drawing.cpp

//#define XLINECHECK

/*
* UAE - The Un*x Amiga Emulator
*
* Screen drawing functions
*
* Copyright 1995-2000 Bernd Schmidt
* Copyright 1995 Alessandro Bissacco
* Copyright 2000-2008 Toni Wilen
*/

/* There are a couple of concepts of "coordinates" in this file.
- DIW coordinates
- DDF coordinates (essentially cycles, resolution lower than lores by a factor of 2)
- Pixel coordinates
* in the Amiga's resolution as determined by BPLCON0 ("Amiga coordinates")
* in the window resolution as determined by the preferences ("window coordinates").
* in the window resolution, and with the origin being the topmost left corner of
the window ("native coordinates")
One note about window coordinates.  The visible area depends on the width of the
window, and the centering code.  The first visible horizontal window coordinate is
often _not_ 0, but the value of VISIBLE_LEFT_BORDER instead.

One important thing to remember: DIW coordinates are in the lowest possible
resolution.

To prevent extremely bad things (think pixels cut in half by window borders) from
happening, all ports should restrict window widths to be multiples of 16 pixels.  */

#include "sysconfig.h"
#include "sysdeps.h"

#include <ctype.h>
#include <assert.h>

#include "options.h"
#include "threaddep/thread.h"
#include "uae.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "xwin.h"
#include "autoconf.h"
#include "gui.h"
#include "picasso96.h"
#include "drawing.h"
#include "savestate.h"
#include "statusline.h"
#include "inputdevice.h"
#include "debug.h"
#include "cd32_fmv.h"
#include "specialmonitors.h"

extern int sprite_buffer_res;
static int lores_factor;
int lores_shift;

static void pfield_set_linetoscr(void);

int debug_bpl_mask = 0xff, debug_bpl_mask_one;

static void lores_set(int lores)
{
	int old = lores;
	lores_shift = lores;
	if (lores_shift != old)
		pfield_set_linetoscr();
}

static void lores_reset (void)
{
	lores_factor = currprefs.gfx_resolution ? 2 : 1;
	lores_set(currprefs.gfx_resolution);
	if (doublescan > 0) {
		if (lores_shift < 2)
			lores_shift++;
		lores_factor = 2;
		lores_set(lores_shift);
	}
	sprite_buffer_res = currprefs.gfx_resolution;
	if (doublescan > 0 && sprite_buffer_res < RES_SUPERHIRES)
		sprite_buffer_res++;
}

bool aga_mode; /* mirror of chipset_mask & CSMASK_AGA */
bool direct_rgb;

/* The shift factor to apply when converting between Amiga coordinates and window
coordinates.  Zero if the resolution is the same, positive if window coordinates
have a higher resolution (i.e. we're stretching the image), negative if window
coordinates have a lower resolution (i.e. we're shrinking the image).  */
static int res_shift;

static int linedbl, linedbld;

int interlace_seen = 0;
#define AUTO_LORES_FRAMES 10
static int can_use_lores = 0, frame_res, frame_res_lace;
static int resolution_count[RES_MAX + 1], lines_count;
static bool center_reset;
static bool need_genlock_data, init_genlock_data;

/* Lookup tables for dual playfields.  The dblpf_*1 versions are for the case
that playfield 1 has the priority, dbplpf_*2 are used if playfield 2 has
priority.  If we need an array for non-dual playfield mode, it has no number.  */
/* The dbplpf_ms? arrays contain a shift value.  plf_spritemask is initialized
to contain two 16 bit words, with the appropriate mask if pf1 is in the
foreground being at bit offset 0, the one used if pf2 is in front being at
offset 16.  */

static int dblpf_ms1[256], dblpf_ms2[256], dblpf_ms[256];
static int dblpf_ind1[256], dblpf_ind2[256];

static int dblpf_2nd1[256], dblpf_2nd2[256];

static const int dblpfofs[] = { 0, 2, 4, 8, 16, 32, 64, 128 };

static int sprite_offs[256];

static uae_u32 clxtab[256];

/* Video buffer description structure. Filled in by the graphics system
* dependent code. */

struct vidbuf_description gfxvidinfo;

/* OCS/ECS color lookup table. */
xcolnr xcolors[4096];

struct spritepixelsbuf {
	uae_u8 attach;
	uae_u8 stdata;
	uae_u16 data;
};
static struct spritepixelsbuf spritepixels_buffer[MAX_PIXELS_PER_LINE];
static struct spritepixelsbuf *spritepixels;
static int sprite_first_x, sprite_last_x;

#ifdef AGA
/* AGA mode color lookup tables */
unsigned int xredcolors[256], xgreencolors[256], xbluecolors[256];
static int dblpf_ind1_aga[256], dblpf_ind2_aga[256];
#else
static uae_u8 spriteagadpfpixels[1];
static int dblpf_ind1_aga[1], dblpf_ind2_aga[1];
#endif
int xredcolor_s, xredcolor_b, xredcolor_m;
int xgreencolor_s, xgreencolor_b, xgreencolor_m;
int xbluecolor_s, xbluecolor_b, xbluecolor_m;

struct color_entry colors_for_drawing;

/* The size of these arrays is pretty arbitrary; it was chosen to be "more
than enough".  The coordinates used for indexing into these arrays are
almost, but not quite, Amiga coordinates (there's a constant offset).  */
static union {
	/* Let's try to align this thing. */
	double uupzuq;
	long int cruxmedo;
	uae_u8 apixels[MAX_PIXELS_PER_LINE * 2];
	uae_u16 apixels_w[MAX_PIXELS_PER_LINE * 2 / sizeof (uae_u16)];
	uae_u32 apixels_l[MAX_PIXELS_PER_LINE * 2 / sizeof (uae_u32)];
} pixdata;

#ifdef OS_WITHOUT_MEMORY_MANAGEMENT
uae_u16 *spixels;
#else
uae_u16 spixels[2 * MAX_SPR_PIXELS];
#endif

/* Eight bits for every pixel.  */
union sps_union spixstate;

static uae_u32 ham_linebuf[MAX_PIXELS_PER_LINE * 2];
static uae_u8 *real_bplpt[8];

static uae_u8 all_ones[MAX_PIXELS_PER_LINE];
static uae_u8 all_zeros[MAX_PIXELS_PER_LINE];

uae_u8 *xlinebuffer, *xlinebuffer_genlock;

static int *amiga2aspect_line_map, *native2amiga_line_map;
static uae_u8 **row_map;
static uae_u8 *row_map_genlock_buffer;
static uae_u8 row_tmp[MAX_PIXELS_PER_LINE * 32 / 8];
static int max_drawn_amiga_line;
uae_u8 **row_map_genlock;

/* line_draw_funcs: pfield_do_linetoscr, pfield_do_fill_line, decode_ham */
typedef void (*line_draw_func)(int, int, bool);

#define LINE_UNDECIDED 1
#define LINE_DECIDED 2
#define LINE_DECIDED_DOUBLE 3
#define LINE_AS_PREVIOUS 4
#define LINE_BLACK 5
#define LINE_REMEMBERED_AS_BLACK 6
#define LINE_DONE 7
#define LINE_DONE_AS_PREVIOUS 8
#define LINE_REMEMBERED_AS_PREVIOUS 9

#define LINESTATE_SIZE ((MAXVPOS + 2) * 2 + 1)

static uae_u8 linestate[LINESTATE_SIZE];

uae_u8 line_data[(MAXVPOS + 2) * 2][MAX_PLANES * MAX_WORDS_PER_LINE * 2];

/* Centering variables.  */
static int min_diwstart, max_diwstop;
/* The visible window: VISIBLE_LEFT_BORDER contains the left border of the visible
area, VISIBLE_RIGHT_BORDER the right border.  These are in window coordinates.  */
int visible_left_border, visible_right_border;
/* Pixels outside of visible_start and visible_stop are always black */
static int visible_left_start, visible_right_stop;
static int visible_top_start, visible_bottom_stop;
/* same for hblank */
static int hblank_left_start, hblank_right_stop;

static int linetoscr_x_adjust_pixbytes, linetoscr_x_adjust_pixels;
static int thisframe_y_adjust;
static int thisframe_y_adjust_real, max_ypos_thisframe, min_ypos_for_screen;
int thisframe_first_drawn_line, thisframe_last_drawn_line;

/* A frame counter that forces a redraw after at least one skipped frame in
interlace mode.  */
static int last_redraw_point;

#define MAX_STOP 30000
static int first_drawn_line, last_drawn_line;
static int first_block_line, last_block_line;

#define NO_BLOCK -3

/* These are generated by the drawing code from the line_decisions array for
each line that needs to be drawn.  These are basically extracted out of
bit fields in the hardware registers.  */
static int bplehb, bplham, bpldualpf, bpldualpfpri, bpldualpf2of, bplplanecnt, ecsshres;
static bool issprites;
static int bplres;
static int plf1pri, plf2pri, bplxor, bpldelay_sh;
static bool enabled_sh;
static uae_u32 plf_sprite_mask;
static int sbasecol[2] = { 16, 16 };
static int hposblank;
static bool specialmonitoron;
static bool ecs_genlock_features_active;
static uae_u8 ecs_genlock_features_mask;
static bool ecs_genlock_features_colorkey;

bool picasso_requested_on;
bool picasso_on;

uae_sem_t gui_sem;
int inhibit_frame;

int framecnt = 0;
static int frame_redraw_necessary;
static int picasso_redraw_necessary;

#ifdef XLINECHECK
static void xlinecheck (unsigned int start, unsigned int end)
{
	unsigned int xstart = (unsigned int)xlinebuffer + start * gfxvidinfo.drawbuffer.pixbytes;
	unsigned int xend = (unsigned int)xlinebuffer + end * gfxvidinfo.drawbuffer.pixbytes;
	unsigned int end1 = (unsigned int)gfxvidinfo.drawbuffer.bufmem + gfxvidinfo.drawbuffer.rowbytes * gfxvidinfo.drawbuffer.height;
	int min = linetoscr_x_adjust_bytes / gfxvidinfo.drawbuffer.pixbytes;
	int ok = 1;

	if (xstart >= gfxvidinfo.drawbuffer.emergmem && xstart < gfxvidinfo.drawbuffer.emergmem + 4096 * gfxvidinfo.drawbuffer.pixbytes &&
		xend >= gfxvidinfo.drawbuffer.emergmem && xend < gfxvidinfo.drawbuffer.emergmem + 4096 * gfxvidinfo.drawbuffer.pixbytes)
		return;

	if (xstart < (unsigned int)gfxvidinfo.drawbuffer.bufmem || xend < (unsigned int)gfxvidinfo.drawbuffer.bufmem)
		ok = 0;
	if (xend > end1 || xstart >= end1)
		ok = 0;
	xstart -= (unsigned int)gfxvidinfo.drawbuffer.bufmem;
	xend -= (unsigned int)gfxvidinfo.drawbuffer.bufmem;
	if ((xstart % gfxvidinfo.drawbuffer.rowbytes) >= gfxvidinfo.drawbuffer.width * gfxvidinfo.drawbuffer.pixbytes)
		ok = 0;
	if ((xend % gfxvidinfo.drawbuffer.rowbytes) >= gfxvidinfo.drawbuffer.width * gfxvidinfo.drawbuffer.pixbytes)
		ok = 0;
	if (xstart >= xend)
		ok = 0;
	if (xend - xstart > gfxvidinfo.drawbuffer.width * gfxvidinfo.drawbuffer.pixbytes)
		ok = 0;

	if (!ok) {
		write_log (_T("*** %d-%d (%dx%dx%d %d) %p\n"),
			start - min, end - min, gfxvidinfo.drawbuffer.width, gfxvidinfo.drawbuffer.height,
			gfxvidinfo.drawbuffer.pixbytes, gfxvidinfo.drawbuffer.rowbytes,
			xlinebuffer);
	}
}
#else
#define xlinecheck(start, end)
#endif

static void clearbuffer (struct vidbuffer *dst)
{
	if (!dst->bufmem_allocated)
		return;
	uae_u8 *p = dst->bufmem_allocated;
	for (int y = 0; y < dst->height_allocated; y++) {
		memset (p, 0, dst->width_allocated * dst->pixbytes);
		p += dst->rowbytes;
	}
}

static void reset_decision_table (void)
{
	for (int i = 0; i < sizeof linestate / sizeof *linestate; i++) {
		linestate[i] = LINE_UNDECIDED;
	}
}

STATIC_INLINE void count_frame (void)
{
	framecnt++;
	if (framecnt >= currprefs.gfx_framerate)
		framecnt = 0;
	if (inhibit_frame)
		framecnt = 1;
}

STATIC_INLINE int xshift (int x, int shift)
{
	if (shift < 0)
		return x >> (-shift);
	else
		return x << shift;
}

int coord_native_to_amiga_x (int x)
{
	x += visible_left_border;
	x = xshift (x, 1 - lores_shift);
	return x + 2 * DISPLAY_LEFT_SHIFT - 2 * DIW_DDF_OFFSET;
}

int coord_native_to_amiga_y (int y)
{
	return native2amiga_line_map[y] + thisframe_y_adjust - minfirstline;
}

STATIC_INLINE int res_shift_from_window (int x)
{
	if (res_shift >= 0)
		return x >> res_shift;
	return x << -res_shift;
}

STATIC_INLINE int res_shift_from_amiga (int x)
{
	if (res_shift >= 0)
		return x >> res_shift;
	return x << -res_shift;
}

void notice_screen_contents_lost (void)
{
	picasso_redraw_necessary = 1;
	frame_redraw_necessary = 2;
}

bool isnativevidbuf (void)
{
	if (gfxvidinfo.outbuffer == NULL)
		return false;
	if (gfxvidinfo.outbuffer == &gfxvidinfo.drawbuffer)
		return true;
	return gfxvidinfo.outbuffer->nativepositioning;
}

extern int plffirstline_total, plflastline_total;
extern int first_planes_vpos, last_planes_vpos;
extern int diwfirstword_total, diwlastword_total;
extern int ddffirstword_total, ddflastword_total;
extern bool vertical_changed, horizontal_changed;
extern int firstword_bplcon1;
extern int lof_store;

#define MIN_DISPLAY_W 256
#define MIN_DISPLAY_H 192
#define MAX_DISPLAY_W 362
#define MAX_DISPLAY_H 283

static int gclow, gcloh, gclox, gcloy, gclorealh;
static int stored_left_start, stored_top_start, stored_width, stored_height;

void get_custom_topedge (int *xp, int *yp, bool max)
{
	
	if (isnativevidbuf () && !max) {
		int x, y;
		x = visible_left_border + (DISPLAY_LEFT_SHIFT << currprefs.gfx_resolution);
		y = minfirstline << currprefs.gfx_vresolution;
#if 0
		int dbl1, dbl2;
		dbl2 = dbl1 = currprefs.gfx_vresolution;
		if (doublescan > 0 && interlace_seen <= 0) {
			dbl1--;
			dbl2--;
		}
		x = -(visible_left_border + (DISPLAY_LEFT_SHIFT << currprefs.gfx_resolution));
		y = -minfirstline << currprefs.gfx_vresolution;
		y = xshift (y, dbl2);
#endif
		*xp = x;
		*yp = y;
	} else {
		*xp = 0;
		*yp = 0;
	}
}

static void reset_custom_limits (void)
{
	gclow = gcloh = gclox = gcloy = 0;
	gclorealh = -1;
	center_reset = true;
}

static void set_blanking_limits (void)
{
	hblank_left_start = visible_left_start;
	hblank_right_stop = visible_right_stop;

	if (programmedmode) {
		if (hblank_left_start < coord_hw_to_window_x (hsyncendpos * 2))
			hblank_left_start = coord_hw_to_window_x (hsyncendpos * 2);
		if (hblank_right_stop > coord_hw_to_window_x (hsyncstartpos * 2))
			hblank_right_stop = coord_hw_to_window_x (hsyncstartpos * 2);
	}
}

void get_custom_raw_limits (int *pw, int *ph, int *pdx, int *pdy)
{
	if (stored_width > 0) {
		*pw = stored_width;
		*ph = stored_height;
		*pdx = stored_left_start;
		*pdy = stored_top_start;
	} else {
		int x = visible_left_border;
		if (x < visible_left_start)
			x = visible_left_start;
		*pdx = x;
		int x2 = visible_right_border;
		if (x2 > visible_right_stop)
			x2 = visible_right_stop;
		*pw = x2 - x;
		int y = min_ypos_for_screen;
		if (y < visible_top_start)
			y = visible_top_start;
		*pdy = y;
		int y2 = max_ypos_thisframe;
		if (y2 > visible_bottom_stop)
			y2 = visible_bottom_stop;
		*ph = y2 - y;
	}
}

void check_custom_limits(void)
{
	int vls = visible_left_start;
	int vrs = visible_right_stop;
	int vts = visible_top_start;
	int vbs = visible_bottom_stop;

	struct gfx_filterdata *fd = &currprefs.gf[0];
	int left = fd->gfx_filter_left_border >> (RES_MAX - currprefs.gfx_resolution);
	int right = fd->gfx_filter_right_border >> (RES_MAX - currprefs.gfx_resolution);
	int top = fd->gfx_filter_top_border;
	int bottom = fd->gfx_filter_bottom_border;

	if (left > visible_left_start)
		visible_left_start = left;
	if (right > left && right < visible_right_stop)
		visible_right_stop = right;

	if (top > visible_top_start)
		visible_top_start = top;
	if (bottom > top && bottom < visible_bottom_stop)
		visible_bottom_stop = bottom;
	
	set_blanking_limits ();
}

void set_custom_limits (int w, int h, int dx, int dy)
{
	int vls = visible_left_start;
	int vrs = visible_right_stop;
	int vts = visible_top_start;
	int vbs = visible_bottom_stop;

	if (w <= 0 || dx < 0) {
		visible_left_start = 0;
		visible_right_stop = MAX_STOP;
	} else {
		visible_left_start = visible_left_border + dx;
		visible_right_stop = visible_left_start + w;
	}
	if (h <= 0 || dy < 0) {
		visible_top_start = 0;
		visible_bottom_stop = MAX_STOP;
	} else {
		visible_top_start = min_ypos_for_screen + dy;
		visible_bottom_stop = visible_top_start + h;
	}

	if (vls != visible_left_start || vrs != visible_right_stop ||
		vts != visible_top_start || vbs != visible_bottom_stop)
		notice_screen_contents_lost ();

	check_custom_limits();
}

void store_custom_limits (int w, int h, int x, int y)
{
	stored_left_start = x;
	stored_top_start = y;
	stored_width = w;
	stored_height = h;
#if 0
	write_log (_T("%dx%d %dx%d %dx%d %dx%d %d\n"), x, y, w, h,
	   	currprefs.gfx_xcenter_pos,
		currprefs.gfx_ycenter_pos,
		currprefs.gfx_xcenter_size,
		currprefs.gfx_ycenter_size,
		currprefs.gfx_filter_autoscale);
#endif
}

int get_custom_limits (int *pw, int *ph, int *pdx, int *pdy, int *prealh)
{
	int w, h, dx, dy, y1, y2, dbl1, dbl2;
	int ret = 0;

	if (!pw || !ph || !pdx || !pdy) {
		reset_custom_limits ();
		return 0;
	}

	if (!isnativevidbuf ()) {
		*pw = gfxvidinfo.outbuffer->outwidth;
		*ph = gfxvidinfo.outbuffer->outheight;
		*pdx = 0;
		*pdy = 0;
		*prealh = -1;
		return 1;
	}

	*pw = gclow;
	*ph = gcloh;
	*pdx = gclox;
	*pdy = gcloy;
	*prealh = gclorealh;

	if (gclow > 0 && gcloh > 0)
		ret = -1;

	if (interlace_seen) {
		static int interlace_count;
		// interlace = only use long frames
		if (lof_store && (interlace_count & 1) == 0)
			interlace_count++;
		if (!lof_store && (interlace_count & 1) != 0)
			interlace_count++;
		if (interlace_count < 3)
			return ret;
		if (!lof_store)
			return ret;
		interlace_count = 0;
		/* program may have set last visible line as last possible line (CD32 boot screen) */
		if (last_planes_vpos < maxvpos)
			last_planes_vpos++;
		if (plflastline_total < maxvpos)
			plflastline_total++;
	}

	if (plflastline_total < 4)
		plflastline_total = last_planes_vpos;

	ddffirstword_total = coord_hw_to_window_x (ddffirstword_total * 2 + DIW_DDF_OFFSET);
	ddflastword_total = coord_hw_to_window_x (ddflastword_total * 2 + DIW_DDF_OFFSET);

	if (doublescan <= 0 && !programmedmode) {
		int min = coord_diw_to_window_x (92);
		int max = coord_diw_to_window_x (460);
		if (diwfirstword_total < min)
			diwfirstword_total = min;
		if (diwlastword_total > max)
			diwlastword_total = max;
		if (ddffirstword_total < min)
			ddffirstword_total = min;
		if (ddflastword_total > max)
			ddflastword_total = max;
		if (0 && !(currprefs.chipset_mask & CSMASK_AGA)) {
			if (ddffirstword_total > diwfirstword_total)
				diwfirstword_total = ddffirstword_total;
			if (ddflastword_total < diwlastword_total)
				diwlastword_total = ddflastword_total;
		}
	}

	w = diwlastword_total - diwfirstword_total;
	dx = diwfirstword_total - visible_left_border;

	y2 = plflastline_total;
	if (y2 > last_planes_vpos)
		y2 = last_planes_vpos;
	y1 = plffirstline_total;
	if (first_planes_vpos > y1)
		y1 = first_planes_vpos;
	if (minfirstline > y1)
		y1 = minfirstline;

	dbl2 = dbl1 = currprefs.gfx_vresolution;
	if (doublescan > 0 && interlace_seen <= 0) {
		dbl1--;
		dbl2--;
	}

	h = y2 - y1;
	dy = y1 - minfirstline;

	if (first_planes_vpos == 0) {
		// no planes enabled during frame
		if (ret < 0)
			return 1;
		h = currprefs.ntscmode ? 200 : 240;
		w = 320 << currprefs.gfx_resolution;
		dy = 36 / 2;
		dx = 58;
	}

	if (dx < 0)
		dx = 0;

	*prealh = -1;
	if (!programmedmode && first_planes_vpos) {
		int th = (maxvpos - minfirstline) * 95 / 100;
		if (th > h) {
			th = xshift (th, dbl1);
			*prealh = th;
		}
	}

	dy = xshift (dy, dbl2);
	h = xshift (h, dbl1);

	if (w == 0 || h == 0)
		return 0;

	if (doublescan <= 0 && !programmedmode) {
		if ((w >> currprefs.gfx_resolution) < MIN_DISPLAY_W) {
			dx += (w - (MIN_DISPLAY_W << currprefs.gfx_resolution)) / 2;
			w = MIN_DISPLAY_W << currprefs.gfx_resolution;
		}
		if ((h >> dbl1) < MIN_DISPLAY_H) {
			dy += (h - (MIN_DISPLAY_H << dbl1)) / 2;
			h = MIN_DISPLAY_H << dbl1;
		}
		if ((w >> currprefs.gfx_resolution) > MAX_DISPLAY_W) {
			dx += (w - (MAX_DISPLAY_W << currprefs.gfx_resolution)) / 2;
			w = MAX_DISPLAY_W << currprefs.gfx_resolution;
		}
		if ((h >> dbl1) > MAX_DISPLAY_H) {
			dy += (h - (MAX_DISPLAY_H << dbl1)) / 2;
			h = MAX_DISPLAY_H << dbl1;
		}
	}

	if (gclow == w && gcloh == h && gclox == dx && gcloy == dy)
		return ret;

	if (w <= 0 || h <= 0 || dx < 0 || dy < 0)
		return ret;
	if (doublescan <= 0 && !programmedmode) {
		if (dx > gfxvidinfo.outbuffer->inwidth / 3)
			return ret;
		if (dy > gfxvidinfo.outbuffer->inheight / 3)
			return ret;
	}

	gclow = w;
	gcloh = h;
	gclox = dx;
	gcloy = dy;
	gclorealh = *prealh;
	*pw = w;
	*ph = h;
	*pdx = dx;
	*pdy = dy;
#if 1
	write_log (_T("Display Size: %dx%d Offset: %dx%d\n"), w, h, dx, dy);
	write_log (_T("First: %d Last: %d MinV: %d MaxV: %d Min: %d\n"),
		plffirstline_total, plflastline_total,
		first_planes_vpos, last_planes_vpos, minfirstline);
#endif
	center_reset = true;
	return 1;
}

void get_custom_mouse_limits (int *pw, int *ph, int *pdx, int *pdy, int dbl)
{
	int delay1, delay2;
	int w, h, dx, dy, dbl1, dbl2, y1, y2;

	w = diwlastword_total - diwfirstword_total;
	dx = diwfirstword_total - visible_left_border;

	y2 = plflastline_total;
	if (y2 > last_planes_vpos)
		y2 = last_planes_vpos;
	y1 = plffirstline_total;
	if (first_planes_vpos > y1)
		y1 = first_planes_vpos;
	if (minfirstline > y1)
		y1 = minfirstline;

	h = y2 - y1;
	dy = y1 - minfirstline;

	if (*pw > 0)
		w = *pw;

	w = xshift (w, res_shift);

	if (*ph > 0)
		h = *ph;

	delay1 = (firstword_bplcon1 & 0x0f) | ((firstword_bplcon1 & 0x0c00) >> 6);
	delay2 = ((firstword_bplcon1 >> 4) & 0x0f) | (((firstword_bplcon1 >> 4) & 0x0c00) >> 6);
//	if (delay1 == delay2)
//		dx += delay1;

	dx = xshift (dx, res_shift);

	dbl2 = dbl1 = currprefs.gfx_vresolution;
	if ((doublescan > 0 || interlace_seen > 0) && !dbl) {
		dbl1--;
		dbl2--;
	}
	if (interlace_seen > 0)
		dbl2++;
	if (interlace_seen <= 0 && dbl)
		dbl2--;
	h = xshift (h, dbl1);
	dy = xshift (dy, dbl2);

	if (w < 1)
		w = 1;
	if (h < 1)
		h = 1;
	if (dx < 0)
		dx = 0;
	if (dy < 0)
		dy = 0;
	*pw = w; *ph = h;
	*pdx = dx; *pdy = dy;
}

static struct decision *dp_for_drawing;
static struct draw_info *dip_for_drawing;

/* Record DIW of the current line for use by centering code.  */
void record_diw_line (int plfstrt, int first, int last)
{
	if (last > max_diwstop)
		max_diwstop = last;
	if (first < min_diwstart) {
		min_diwstart = first;
		/*
		if (plfstrt * 2 > min_diwstart)
		min_diwstart = plfstrt * 2;
		*/
	}
}

/*
* Screen update macros/functions
*/

/* The important positions in the line: where do we start drawing the left border,
where do we start drawing the playfield, where do we start drawing the right border.
All of these are forced into the visible window (VISIBLE_LEFT_BORDER .. VISIBLE_RIGHT_BORDER).
PLAYFIELD_START and PLAYFIELD_END are in window coordinates.  */
static int playfield_start, playfield_end;
static int real_playfield_start, real_playfield_end;
static int sprite_playfield_start;
static bool may_require_hard_way;
static int linetoscr_diw_start, linetoscr_diw_end;
static int native_ddf_left, native_ddf_right;

static int pixels_offset;
static int src_pixel;
/* How many pixels in window coordinates which are to the left of the left border.  */
static int unpainted;

STATIC_INLINE xcolnr getbgc (bool blank)
{
#if 0
	if (blank)
		return xcolors[0x088];
	else if (hposblank == 1)
		return xcolors[0xf00];
	else if (hposblank == 2)
		return xcolors[0x0f0];
	else if (hposblank == 3)
		return xcolors[0x00f];
	else if (colors_for_drawing.borderblank)
		return xcolors[0x880];
	//return colors_for_drawing.acolors[0];
	return xcolors[0xf0f];
#endif
	return (blank || hposblank || colors_for_drawing.borderblank) ? 0 : colors_for_drawing.acolors[0];
}


static void set_res_shift(int shift)
{
	int old = res_shift;
	res_shift = shift;
	if (res_shift != old)
		pfield_set_linetoscr();
}

/* Initialize the variables necessary for drawing a line.
* This involves setting up start/stop positions and display window
* borders.  */
static void pfield_init_linetoscr (bool border)
{
	/* First, get data fetch start/stop in DIW coordinates.  */
	int ddf_left = dp_for_drawing->plfleft * 2 + DIW_DDF_OFFSET;
	int ddf_right = dp_for_drawing->plfright * 2 + DIW_DDF_OFFSET;
	int leftborderhidden;
	int native_ddf_left2;

	if (border)
		ddf_left = DISPLAY_LEFT_SHIFT;

	/* Compute datafetch start/stop in pixels; native display coordinates.  */
	native_ddf_left = coord_hw_to_window_x (ddf_left);
	native_ddf_right = coord_hw_to_window_x (ddf_right);

	// Blerkenwiegel/Scoopex workaround
	native_ddf_left2 = native_ddf_left;
	if (native_ddf_left < 0)
		native_ddf_left = 0;

	if (native_ddf_right < native_ddf_left)
		native_ddf_right = native_ddf_left;

	linetoscr_diw_start = dp_for_drawing->diwfirstword;
	linetoscr_diw_end = dp_for_drawing->diwlastword;

	/* Perverse cases happen. */
	if (linetoscr_diw_end < linetoscr_diw_start)
		linetoscr_diw_end = linetoscr_diw_start;

	set_res_shift(lores_shift - bplres);

	playfield_start = linetoscr_diw_start;
	playfield_end = linetoscr_diw_end;

	if (playfield_start < native_ddf_left)
		playfield_start = native_ddf_left;
	if (playfield_end > native_ddf_right)
		playfield_end = native_ddf_right;

	if (playfield_start < visible_left_border)
		playfield_start = visible_left_border;
	if (playfield_start > visible_right_border)
		playfield_start = visible_right_border;
	if (playfield_end < visible_left_border)
		playfield_end = visible_left_border;
	if (playfield_end > visible_right_border)
		playfield_end = visible_right_border;

	real_playfield_start = playfield_start;
	sprite_playfield_start = playfield_start;
	real_playfield_end = playfield_end;

	// Sprite hpos don't include DIW_DDF_OFFSET and can appear 1 lores pixel
	// before first bitplane pixel appears.
	// This means "bordersprite" condition is possible under OCS/ECS too. Argh!
	if (dip_for_drawing->nr_sprites) {
		if (!colors_for_drawing.borderblank) {
			/* bordersprite off or not supported: sprites are visible until diw_end */
			if (playfield_end < linetoscr_diw_end && hblank_right_stop > playfield_end) {
				playfield_end = linetoscr_diw_end;
			}
			int left = coord_hw_to_window_x (dp_for_drawing->plfleft * 2);
			if (left < visible_left_border)
				left = visible_left_border;
			if (left < playfield_start && left >= linetoscr_diw_start) {
				playfield_start = left;
			}
		} else {
			sprite_playfield_start = 0;
			if (playfield_end < linetoscr_diw_end && hblank_right_stop > playfield_end) {
				playfield_end = linetoscr_diw_end;
			}
		}
	}

#ifdef AGA
	may_require_hard_way = false;
	if (dp_for_drawing->bordersprite_seen && !colors_for_drawing.borderblank && dip_for_drawing->nr_sprites) {
		int min = visible_right_border, max = visible_left_border, i;
		for (i = 0; i < dip_for_drawing->nr_sprites; i++) {
			int x;
			x = curr_sprite_entries[dip_for_drawing->first_sprite_entry + i].pos;
			if (x < min)
				min = x;
			// include max extra pixels, sprite may be 2x or 4x size: 4x - 1.
			x = curr_sprite_entries[dip_for_drawing->first_sprite_entry + i].max + (4 - 1);
			if (x > max)
				max = x;
		}
		min = coord_hw_to_window_x (min >> sprite_buffer_res) + (DIW_DDF_OFFSET << lores_shift);
		max = coord_hw_to_window_x (max >> sprite_buffer_res) + (DIW_DDF_OFFSET << lores_shift);

		if (min < playfield_start)
			playfield_start = min;
		if (playfield_start < visible_left_border)
			playfield_start = visible_left_border;
		if (max > playfield_end)
			playfield_end = max;
		if (playfield_end > visible_right_border)
			playfield_end = visible_right_border;
		sprite_playfield_start = 0;
		may_require_hard_way = true;
	}
#endif

	unpainted = visible_left_border < playfield_start ? 0 : visible_left_border - playfield_start;
	unpainted = res_shift_from_window (unpainted);

	int first_x = sprite_first_x;
	int last_x = sprite_last_x;
	if (first_x < last_x) {
		if (dp_for_drawing->bordersprite_seen && !colors_for_drawing.borderblank) {
			if (first_x > visible_left_border)
				first_x = visible_left_border;
			if (last_x < visible_right_border)
				last_x = visible_right_border;
		}
		if (first_x < 0)
			first_x = 0;
		if (last_x > MAX_PIXELS_PER_LINE - 2)
			last_x = MAX_PIXELS_PER_LINE - 2;
		if (first_x < last_x)
			memset (spritepixels + first_x, 0, sizeof (struct spritepixelsbuf) * (last_x - first_x + 1));
	}

	sprite_last_x = 0;
	sprite_first_x = MAX_PIXELS_PER_LINE - 1;

	/* Now, compute some offsets.  */
	ddf_left -= DISPLAY_LEFT_SHIFT;
	pixels_offset = MAX_PIXELS_PER_LINE - (ddf_left << bplres);
	ddf_left <<= bplres;

	leftborderhidden = playfield_start - native_ddf_left2;
	if (hblank_left_start > playfield_start)
		leftborderhidden += hblank_left_start - playfield_start;
	src_pixel = MAX_PIXELS_PER_LINE + res_shift_from_window (leftborderhidden);

	if (dip_for_drawing->nr_sprites == 0)
		return;

	/* We need to clear parts of apixels.  */
	if (linetoscr_diw_start < native_ddf_left) {
		int size = res_shift_from_window (native_ddf_left - linetoscr_diw_start);
		linetoscr_diw_start = native_ddf_left;
		memset (pixdata.apixels + MAX_PIXELS_PER_LINE - size, 0, size);
	}
	if (linetoscr_diw_end > native_ddf_right) {
		int pos = res_shift_from_window (native_ddf_right - native_ddf_left);
		int size = res_shift_from_window (linetoscr_diw_end - native_ddf_right);
		linetoscr_diw_start = native_ddf_left;
		memset (pixdata.apixels + MAX_PIXELS_PER_LINE + pos, 0, size);
	}
}

// erase sprite graphics in pixdata if they were outside of ddf
static void pfield_erase_hborder_sprites (void)
{
	if (sprite_first_x < native_ddf_left) {
		int size = res_shift_from_window (native_ddf_left - sprite_first_x);
		memset (pixdata.apixels + MAX_PIXELS_PER_LINE - size, 0, size);
	}
	if (sprite_last_x > native_ddf_right) {
		int pos = res_shift_from_window (native_ddf_right - native_ddf_left);
		int size = res_shift_from_window (sprite_last_x - native_ddf_right);
		memset (pixdata.apixels + MAX_PIXELS_PER_LINE + pos, 0, size);
	}
}

// erase whole viewable area if sprite in upper or lower border
static void pfield_erase_vborder_sprites (void)
{
	if (visible_right_border <= visible_left_border)
		return;
	int pos = 0;
	int size = 0;
	if (visible_left_border < native_ddf_left) {
		size = res_shift_from_window (native_ddf_left - visible_left_border);
		pos = -size;
	}
	if (visible_right_border > native_ddf_left)
		size += res_shift_from_window (visible_right_border - native_ddf_left);
	memset (pixdata.apixels + MAX_PIXELS_PER_LINE - pos, 0, size);
}


STATIC_INLINE uae_u16 merge_2pixel16 (uae_u16 p1, uae_u16 p2)
{
	uae_u16 v = ((((p1 >> xredcolor_s) & xredcolor_m) + ((p2 >> xredcolor_s) & xredcolor_m)) / 2) << xredcolor_s;
	v |= ((((p1 >> xbluecolor_s) & xbluecolor_m) + ((p2 >> xbluecolor_s) & xbluecolor_m)) / 2) << xbluecolor_s;
	v |= ((((p1 >> xgreencolor_s) & xgreencolor_m) + ((p2 >> xgreencolor_s) & xgreencolor_m)) / 2) << xgreencolor_s;
	return v;
}
STATIC_INLINE uae_u32 merge_2pixel32 (uae_u32 p1, uae_u32 p2)
{
	uae_u32 v = ((((p1 >> 16) & 0xff) + ((p2 >> 16) & 0xff)) / 2) << 16;
	v |= ((((p1 >> 8) & 0xff) + ((p2 >> 8) & 0xff)) / 2) << 8;
	v |= ((((p1 >> 0) & 0xff) + ((p2 >> 0) & 0xff)) / 2) << 0;
	return v;
}

STATIC_INLINE void fill_line_16 (uae_u8 *buf, int start, int stop, bool blank)
{
	uae_u16 *b = (uae_u16 *)buf;
	unsigned int i;
	unsigned int rem = 0;
	xcolnr col = getbgc (blank);
	if (((uintptr_t)&b[start]) & 1)
		b[start++] = (uae_u16) col;
	if (start >= stop)
		return;
	if (((uintptr_t)&b[stop]) & 1) {
		rem++;
		stop--;
	}
	for (i = start; i < stop; i += 2) {
		uae_u32 *b2 = (uae_u32 *)&b[i];
		*b2 = col;
	}
	if (rem)
		b[stop] = (uae_u16)col;
}

STATIC_INLINE void fill_line_32 (uae_u8 *buf, int start, int stop, bool blank)
{
	uae_u32 *b = (uae_u32 *)buf;
	unsigned int i;
	xcolnr col = getbgc (blank);
	for (i = start; i < stop; i++)
		b[i] = col;
}

static void pfield_do_fill_line (int start, int stop, bool blank)
{
	switch (gfxvidinfo.drawbuffer.pixbytes) {
	case 2: fill_line_16 (xlinebuffer, start, stop, blank); break;
	case 4: fill_line_32 (xlinebuffer, start, stop, blank); break;
	}
	if (need_genlock_data) {
		memset(xlinebuffer_genlock + start, 0, stop - start);
	}
}

static void fill_line2 (int startpos, int len)
{
	int shift;
	int nints, nrem;
	int *start;
	xcolnr val;

	shift = 0;
	if (gfxvidinfo.drawbuffer.pixbytes == 2)
		shift = 1;
	if (gfxvidinfo.drawbuffer.pixbytes == 4)
		shift = 2;

	nints = len >> (2 - shift);
	nrem = nints & 7;
	nints &= ~7;
	start = (int *)(((uae_u8*)xlinebuffer) + (startpos << shift));
	val = getbgc (false);
	for (; nints > 0; nints -= 8, start += 8) {
		*start = val;
		*(start+1) = val;
		*(start+2) = val;
		*(start+3) = val;
		*(start+4) = val;
		*(start+5) = val;
		*(start+6) = val;
		*(start+7) = val;
	}

	switch (nrem) {
	case 7:
		*start++ = val;
	case 6:
		*start++ = val;
	case 5:
		*start++ = val;
	case 4:
		*start++ = val;
	case 3:
		*start++ = val;
	case 2:
		*start++ = val;
	case 1:
		*start = val;
	}
}

static void fill_line_border (int lineno)
{
	int lastpos = visible_left_border;
	int endpos = visible_left_border + gfxvidinfo.drawbuffer.inwidth;

	if (lineno < visible_top_start || lineno >= visible_bottom_stop) {
		int b = hposblank;
		hposblank = 3;
		fill_line2(lastpos, gfxvidinfo.drawbuffer.inwidth);
		if (need_genlock_data) {
			memset(xlinebuffer_genlock + lastpos, 0, gfxvidinfo.drawbuffer.inwidth);
		}
		hposblank = b;
		return;
	}

	// full hblank
	if (hposblank) {
		hposblank = 3;
		fill_line2(lastpos, gfxvidinfo.drawbuffer.inwidth);
		if (need_genlock_data) {
			memset(xlinebuffer_genlock + lastpos, 0, gfxvidinfo.drawbuffer.inwidth);
		}
		return;
	}
	// hblank not visible
	if (hblank_left_start <= lastpos && hblank_right_stop >= endpos) {
		fill_line2(lastpos, gfxvidinfo.drawbuffer.inwidth);
		if (need_genlock_data) {
			memset(xlinebuffer_genlock + lastpos, 0, gfxvidinfo.drawbuffer.inwidth);
		}
		return;
	}

	// left, right or both hblanks visible
	if (lastpos < hblank_left_start) {
		int t = hblank_left_start < endpos ? hblank_left_start : endpos;
		pfield_do_fill_line(lastpos, t, true);
		lastpos = t;
	}
	if (lastpos < hblank_right_stop) {
		int t = hblank_right_stop < endpos ? hblank_right_stop : endpos;
		pfield_do_fill_line(lastpos, t, false);
		lastpos = t;
	}
	if (lastpos < endpos) {
		pfield_do_fill_line(lastpos, endpos, true);
	}
}

#define SPRITE_DEBUG 0
static uae_u8 render_sprites (int pos, int dualpf, uae_u8 apixel, int aga)
{
	struct spritepixelsbuf *spb = &spritepixels[pos];
	unsigned int v = spb->data;
	int *shift_lookup = dualpf ? (bpldualpfpri ? dblpf_ms2 : dblpf_ms1) : dblpf_ms;
	int maskshift, plfmask;

	/* The value in the shift lookup table is _half_ the shift count we
	need.  This is because we can't shift 32 bits at once (undefined
	behaviour in C).  */
	maskshift = shift_lookup[apixel];
	plfmask = (plf_sprite_mask >> maskshift) >> maskshift;
	v &= ~plfmask;
	/* Extra 1 sprite pixel at DDFSTRT is only possible if at least 1 plane is active */
	if ((bplplanecnt > 0 || pos >= sprite_playfield_start) && (v != 0 || SPRITE_DEBUG)) {
		unsigned int vlo, vhi, col;
		unsigned int v1 = v & 255;
		/* OFFS determines the sprite pair with the highest priority that has
		any bits set.  E.g. if we have 0xFF00 in the buffer, we have sprite
		pairs 01 and 23 cleared, and pairs 45 and 67 set, so OFFS will
		have a value of 4.
		2 * OFFS is the bit number in V of the sprite pair, and it also
		happens to be the color offset for that pair. 
		*/
		int offs;
		if (v1 == 0)
			offs = 4 + sprite_offs[v >> 8];
		else
			offs = sprite_offs[v1];

		/* Shift highest priority sprite pair down to bit zero.  */
		v >>= offs * 2;
		v &= 15;
#if SPRITE_DEBUG > 0
		v ^= 8;
#endif
		if (spb->attach && (spb->stdata & (3 << offs))) {
			col = v;
			if (aga)
				col += sbasecol[1];
			else
				col += 16;
		} else {
			/* This sequence computes the correct color value.  We have to select
			either the lower-numbered or the higher-numbered sprite in the pair.
			We have to select the high one if the low one has all bits zero.
			If the lower-numbered sprite has any bits nonzero, (VLO - 1) is in
			the range of 0..2, and with the mask and shift, VHI will be zero.
			If the lower-numbered sprite is zero, (VLO - 1) is a mask of
			0xFFFFFFFF, and we select the bits of the higher numbered sprite
			in VHI.
			This is _probably_ more efficient than doing it with branches.  */
			vlo = v & 3;
			vhi = (v & (vlo - 1)) >> 2;
			col = (vlo | vhi);
			if (aga) {
				if (vhi > 0)
					col += sbasecol[1];
				else
					col += sbasecol[0];
			} else {
				col += 16;
			}
			col += offs * 2;
		}

		return col;
	}

	return 0;
}

static bool get_genlock_very_rare_and_complex_case(uae_u8 v)
{
	// border color without BRDNTRAN bit set = transparent
	if (v == 0 && !colors_for_drawing.borderntrans)
		return false;
	if (ecs_genlock_features_colorkey) {
		// color key match?
		if (currprefs.chipset_mask & CSMASK_AGA) {
			if (colors_for_drawing.color_regs_aga[v] & 0x80000000)
				return false;
		} else {
			if (colors_for_drawing.color_regs_ecs[v] & 0x8000)
				return false;
		}
	}
	// plane mask match?
	if (v & ecs_genlock_features_mask)
		return false;
	return true;
}
// false = transparent
STATIC_INLINE bool get_genlock_transparency(uae_u8 v)
{
	if (!ecs_genlock_features_active) {
		if (v == 0)
			return false;
		return true;
	} else {
		return get_genlock_very_rare_and_complex_case(v);
	}
}

#include "linetoscr.cpp"

#define LTPARMS src_pixel, start, stop

#ifdef ECS_DENISE
/* ECS SuperHires special cases */

#define PUTBPIX(x) buf[dpix] = (x);

STATIC_INLINE uae_u32 shsprite (int dpix, uae_u32 spix_val, uae_u32 v, int spr)
{
	uae_u8 sprcol;
	uae_u16 scol;
	if (!spr)
		return v;
	sprcol = render_sprites (dpix, 0, spix_val, 0);
	if (!sprcol)
		return v;
	/* good enough for now.. */ 
	scol = colors_for_drawing.color_regs_ecs[sprcol] & 0xccc;
	scol |= scol >> 2;
	return xcolors[scol];
}

static int NOINLINE linetoscr_16_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u16 *buf = (uae_u16 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u16 spix_val1, spix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val1, xcolors[v], spr));
		dpix++;
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val2, xcolors[v], spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_16_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_16_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_16_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_16_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_32_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u32 *buf = (uae_u32 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u32 spix_val1, spix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val1, xcolors[v], spr));
		dpix++;
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val2, xcolors[v], spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_32_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_32_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_32_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_32_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_32_shrink1_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u32 *buf = (uae_u32 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u32 spix_val1, spix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val1, xcolors[v], spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_32_shrink1_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink1_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_32_shrink1_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink1_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_32_shrink1f_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u32 *buf = (uae_u32 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u32 spix_val1, spix_val2, dpix_val1, dpix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		dpix_val1 = xcolors[v];
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		dpix_val2 = xcolors[v];
		PUTBPIX(shsprite (dpix, spix_val1, merge_2pixel32 (dpix_val1, dpix_val2), spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_32_shrink1f_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink1f_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_32_shrink1f_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink1f_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_16_shrink1_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u16 *buf = (uae_u16 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u16 spix_val1, spix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val1, xcolors[v], spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_16_shrink1_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink1_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_16_shrink1_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink1_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_16_shrink1f_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u16 *buf = (uae_u16 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u16 spix_val1, spix_val2, dpix_val1, dpix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		dpix_val1 = xcolors[v];
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		dpix_val2 = xcolors[v];
		PUTBPIX(shsprite (dpix, spix_val1, merge_2pixel16 (dpix_val1, dpix_val2), spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_16_shrink1f_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink1f_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_16_shrink1f_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink1f_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_32_shrink2_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u32 *buf = (uae_u32 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u32 spix_val1, spix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val1, xcolors[v], spr));
		spix+=2;
		dpix++;
	}
	return spix;
}
static int linetoscr_32_shrink2_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink2_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_32_shrink2_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink2_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_32_shrink2f_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u32 *buf = (uae_u32 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u32 spix_val1, spix_val2, dpix_val1, dpix_val2, dpix_val3, dpix_val4;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		dpix_val1 = xcolors[v];
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		dpix_val2 = xcolors[v];
		dpix_val3 = merge_2pixel32 (dpix_val1, dpix_val2);
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		dpix_val1 = xcolors[v];
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		dpix_val2 = xcolors[v];
		dpix_val4 = merge_2pixel32 (dpix_val1, dpix_val2);
		PUTBPIX(shsprite (dpix, spix_val1, merge_2pixel32 (dpix_val3, dpix_val4), spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_32_shrink2f_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink2f_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_32_shrink2f_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_32_shrink2f_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_16_shrink2_sh_func(int spix, int dpix, int stoppos, int spr)
{
	uae_u16 *buf = (uae_u16 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u16 spix_val1, spix_val2;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		PUTBPIX(shsprite (dpix, spix_val1, xcolors[v], spr));
		spix+=2;
		dpix++;
	}
	return spix;
}
static int linetoscr_16_shrink2_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink2_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_16_shrink2_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink2_sh_func(spix, dpix, stoppos, false);
}
static int NOINLINE linetoscr_16_shrink2f_sh_func (int spix, int dpix, int stoppos, int spr)
{
	uae_u16 *buf = (uae_u16 *) xlinebuffer;

	while (dpix < stoppos) {
		uae_u16 spix_val1, spix_val2, dpix_val1, dpix_val2, dpix_val3, dpix_val4;
		uae_u16 v;
		int off;
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		dpix_val1 = xcolors[v];
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		dpix_val2 = xcolors[v];
		dpix_val3 = merge_2pixel32 (dpix_val1, dpix_val2);
		spix_val1 = pixdata.apixels[spix++];
		spix_val2 = pixdata.apixels[spix++];
		off = ((spix_val2 & 3) * 4) + (spix_val1 & 3) + ((spix_val1 | spix_val2) & 16);
		v = (colors_for_drawing.color_regs_ecs[off] & 0xccc) << 0;
		v |= v >> 2;
		dpix_val1 = xcolors[v];
		v = (colors_for_drawing.color_regs_ecs[off] & 0x333) << 2;
		v |= v >> 2;
		dpix_val2 = xcolors[v];
		dpix_val4 = merge_2pixel32 (dpix_val1, dpix_val2);
		PUTBPIX(shsprite (dpix, spix_val1, merge_2pixel16 (dpix_val3, dpix_val4), spr));
		dpix++;
	}
	return spix;
}
static int linetoscr_16_shrink2f_sh_spr(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink2f_sh_func(spix, dpix, stoppos, true);
}
static int linetoscr_16_shrink2f_sh(int spix, int dpix, int stoppos)
{
	return linetoscr_16_shrink2f_sh_func(spix, dpix, stoppos, false);
}
#endif

typedef int(*call_linetoscr)(int spix, int dpix, int dpix_end);

static call_linetoscr pfield_do_linetoscr_normal;
static call_linetoscr pfield_do_linetoscr_sprite;
static call_linetoscr pfield_do_linetoscr_spriteonly;

static void pfield_do_linetoscr(int start, int stop, bool blank)
{
	src_pixel = pfield_do_linetoscr_normal(src_pixel, start, stop);
}
static void pfield_do_linetoscr_spr(int start, int stop, bool blank)
{
	src_pixel = pfield_do_linetoscr_sprite(src_pixel, start, stop);
}
static int pfield_do_nothing(int a, int b, int c)
{
	return a;
}

/* AGA subpixel delay hack */
static call_linetoscr pfield_do_linetoscr_shdelay_normal;
static call_linetoscr pfield_do_linetoscr_shdelay_sprite;

STATIC_INLINE int get_shdelay_add(void)
{
	if (bplres == RES_SUPERHIRES)
		return 0;
	int add = bpldelay_sh;
	add >>= RES_MAX - currprefs.gfx_resolution;
	return add;
}
static int pfield_do_linetoscr_normal_shdelay(int spix, int dpix, int dpix_end)
{
	int add = get_shdelay_add();
	int add2 = add * gfxvidinfo.drawbuffer.pixbytes;
	xlinebuffer += add2;
	int out = pfield_do_linetoscr_shdelay_normal(spix, dpix, dpix_end);
	xlinebuffer -= add2;
	return out;
}
static int pfield_do_linetoscr_sprite_shdelay(int spix, int dpix, int dpix_end)
{
	int add = get_shdelay_add();
	int add2 = add * gfxvidinfo.drawbuffer.pixbytes;
	spritepixels -= add;
	xlinebuffer += add2;
	int out = pfield_do_linetoscr_shdelay_sprite(spix, dpix, dpix_end);
	xlinebuffer -= add2;
	spritepixels += add;
	return out;
}

static void pfield_set_linetoscr (void)
{
	xlinecheck(start, stop);
	enabled_sh = false;
	spritepixels = spritepixels_buffer;
	pfield_do_linetoscr_spriteonly = pfield_do_nothing;
#ifdef AGA
	if (currprefs.chipset_mask & CSMASK_AGA) {
		if (res_shift == 0) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_aga_genlock : linetoscr_16_aga;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_aga_spr_genlock : linetoscr_16_aga_spr;
				pfield_do_linetoscr_spriteonly = linetoscr_16_aga_spronly;
				break;
				case 4:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_aga_genlock : linetoscr_32_aga;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_aga_spr_genlock : linetoscr_32_aga_spr;
				pfield_do_linetoscr_spriteonly = linetoscr_32_aga_spronly;
				break;
			}
		} else if (res_shift == 2) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_stretch2_aga_genlock : linetoscr_16_stretch2_aga;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_stretch2_aga_spr_genlock : linetoscr_16_stretch2_aga_spr_genlock;
				pfield_do_linetoscr_spriteonly = linetoscr_16_stretch2_aga_spronly;
				break;
				case 4:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_stretch2_aga_genlock : linetoscr_32_stretch2_aga;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_stretch2_aga_spr_genlock : linetoscr_32_stretch2_aga_spr;
				pfield_do_linetoscr_spriteonly = linetoscr_32_stretch2_aga_spronly;
				break;
			}
		} else if (res_shift == 1) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_stretch1_aga_genlock : linetoscr_16_stretch1_aga;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_stretch1_aga_spr_genlock : linetoscr_16_stretch1_aga_spr;
				pfield_do_linetoscr_spriteonly = linetoscr_16_stretch1_aga_spronly;
				break;
				case 4:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_stretch1_aga_genlock : linetoscr_32_stretch1_aga;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_stretch1_aga_spr_genlock : linetoscr_32_stretch1_aga_spr;
				pfield_do_linetoscr_spriteonly = linetoscr_32_stretch1_aga_spronly;
				break;
			}
		} else if (res_shift == -1) {
			if (currprefs.gfx_lores_mode) {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_shrink1f_aga_genlock : linetoscr_16_shrink1f_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_shrink1f_aga_spr_genlock : linetoscr_16_shrink1f_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_16_shrink1f_aga_spronly;
					break;
					case 4:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_shrink1f_aga_genlock : linetoscr_32_shrink1f_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_shrink1f_aga_spr_genlock : linetoscr_32_shrink1f_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_32_shrink1f_aga_spronly;
					break;
				}
			} else {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_shrink1_aga_genlock : linetoscr_16_shrink1_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_shrink1_aga_spr_genlock : linetoscr_16_shrink1_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_16_shrink1_aga_spronly;
					break;
					case 4:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_shrink1_aga_genlock : linetoscr_32_shrink1_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_shrink1_aga_spr_genlock : linetoscr_32_shrink1_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_32_shrink1_aga_spronly;
					break;
				}
			}
		} else if (res_shift == -2) {
			if (currprefs.gfx_lores_mode) {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_shrink2f_aga_genlock : linetoscr_16_shrink2f_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_shrink2f_aga_spr_genlock : linetoscr_16_shrink2f_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_16_shrink2f_aga_spronly;
					break;
					case 4:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_shrink2f_aga_genlock : linetoscr_32_shrink2f_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_shrink2f_aga_spr_genlock : linetoscr_32_shrink2f_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_32_shrink2f_aga_spronly;
					break;
				}
			} else {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_shrink2_aga_genlock : linetoscr_16_shrink2_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_shrink2_aga_spr_genlock : linetoscr_16_shrink2_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_16_shrink2_aga_spronly;
					break;
					case 4:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_shrink2_aga_genlock : linetoscr_32_shrink2_aga;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_shrink2_aga_spr_genlock : linetoscr_32_shrink2_aga_spr;
					pfield_do_linetoscr_spriteonly = linetoscr_32_shrink2_aga_spronly;
					break;
				}
			}
		}
		if (get_shdelay_add()) {
			pfield_do_linetoscr_shdelay_normal = pfield_do_linetoscr_normal;
			pfield_do_linetoscr_shdelay_sprite = pfield_do_linetoscr_sprite;
			pfield_do_linetoscr_normal = pfield_do_linetoscr_normal_shdelay;
			pfield_do_linetoscr_sprite = pfield_do_linetoscr_sprite_shdelay;
			enabled_sh = true;
		}
	}
#endif
#ifdef ECS_DENISE
	if (!(currprefs.chipset_mask & CSMASK_AGA) && ecsshres) {
		// TODO: genlock support
		if (res_shift == 0) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = linetoscr_16_sh;
				pfield_do_linetoscr_sprite = linetoscr_16_sh_spr;
				break;
				case 4:
				pfield_do_linetoscr_normal = linetoscr_32_sh;
				pfield_do_linetoscr_sprite = linetoscr_32_sh_spr;
				break;
			}
		} else if (res_shift == -1) {
			if (currprefs.gfx_lores_mode) {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = linetoscr_16_shrink1f_sh;
					pfield_do_linetoscr_sprite = linetoscr_16_shrink1f_sh_spr;
					break;
					case 4:
					pfield_do_linetoscr_normal = linetoscr_32_shrink1f_sh;
					pfield_do_linetoscr_sprite = linetoscr_32_shrink1f_sh_spr;
					break;
				}
			} else {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = linetoscr_16_shrink1_sh;
					pfield_do_linetoscr_sprite = linetoscr_16_shrink1_sh_spr;
					break;
					case 4:
					pfield_do_linetoscr_normal = linetoscr_32_shrink1_sh;
					pfield_do_linetoscr_sprite = linetoscr_32_shrink1_sh_spr;
					break;
				}
			}
		} else if (res_shift == -2) {
			if (currprefs.gfx_lores_mode) {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = linetoscr_16_shrink2f_sh;
					pfield_do_linetoscr_sprite = linetoscr_16_shrink2f_sh_spr;
					break;
					case 4:
					pfield_do_linetoscr_normal = linetoscr_32_shrink2f_sh;
					pfield_do_linetoscr_sprite = linetoscr_32_shrink2f_sh_spr;
					break;
				}
			} else {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = linetoscr_16_shrink2_sh;
					pfield_do_linetoscr_sprite = linetoscr_16_shrink2_sh_spr;
					break;
					case 4:
					pfield_do_linetoscr_normal = linetoscr_32_shrink2_sh;
					pfield_do_linetoscr_sprite = linetoscr_32_shrink2_sh_spr;
					break;
				}
			}
		}
	}
#endif
	if (!(currprefs.chipset_mask & CSMASK_AGA) && !ecsshres) {
		if (res_shift == 0) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_genlock : linetoscr_16;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_spr_genlock : linetoscr_16_spr;
				break;
				case 4:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_genlock : linetoscr_32;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_spr_genlock : linetoscr_32_spr;
				break;
			}
		} else if (res_shift == 2) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_stretch2_genlock : linetoscr_16_stretch2;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_stretch2_spr_genlock : linetoscr_16_stretch2_spr;
				break;
				case 4:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_stretch2_genlock : linetoscr_32_stretch2;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_stretch2_spr_genlock : linetoscr_32_stretch2_spr;
				break;
			}
		} else if (res_shift == 1) {
			switch (gfxvidinfo.drawbuffer.pixbytes) {
				case 2:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_stretch1_genlock : linetoscr_16_stretch1;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_stretch1_spr_genlock : linetoscr_16_stretch1_spr;
				break;
				case 4:
				pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_stretch1_genlock : linetoscr_32_stretch1;
				pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_stretch1_spr_genlock : linetoscr_32_stretch1_spr;
				break;
			}
		} else if (res_shift == -1) {
				if (currprefs.gfx_lores_mode) {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_shrink1f_genlock : linetoscr_16_shrink1f;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_shrink1f_spr_genlock : linetoscr_16_shrink1f_spr;
					break;
					case 4:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_shrink1f_genlock : linetoscr_32_shrink1f;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_shrink1f_spr_genlock : linetoscr_32_shrink1f_spr;
					break;
				}
			} else {
				switch (gfxvidinfo.drawbuffer.pixbytes) {
					case 2:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_16_shrink1_genlock : linetoscr_16_shrink1;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_16_shrink1_spr_genlock : linetoscr_16_shrink1_spr;
					break;
					case 4:
					pfield_do_linetoscr_normal = need_genlock_data ? linetoscr_32_shrink1_genlock : linetoscr_32_shrink1;
					pfield_do_linetoscr_sprite = need_genlock_data ? linetoscr_32_shrink1_spr_genlock : linetoscr_32_shrink1_spr;
					break;
				}
			}
		}
	}
}

// left or right AGA border sprite
static void pfield_do_linetoscr_bordersprite_aga (int start, int stop, bool blank)
{
	if (blank) {
		pfield_do_fill_line (start, stop, blank);
		return;
	}
	src_pixel = pfield_do_linetoscr_spriteonly(src_pixel, start, stop);
}

static void dummy_worker (int start, int stop, bool blank)
{
}

static int ham_decode_pixel;
static unsigned int ham_lastcolor;

/* Decode HAM in the invisible portion of the display (left of VISIBLE_LEFT_BORDER),
 * but don't draw anything in.  This is done to prepare HAM_LASTCOLOR for later,
 * when decode_ham runs.
 *
 */
static void init_ham_decoding (void)
{
	int unpainted_amiga = unpainted;

	ham_decode_pixel = src_pixel;
	ham_lastcolor = color_reg_get (&colors_for_drawing, 0);

	if (!bplham) {
		if (unpainted_amiga > 0) {
			int pv = pixdata.apixels[ham_decode_pixel + unpainted_amiga - 1];
#ifdef AGA
			if (currprefs.chipset_mask & CSMASK_AGA)
				ham_lastcolor = colors_for_drawing.color_regs_aga[pv ^ bplxor] & 0xffffff;
			else
#endif
				ham_lastcolor = colors_for_drawing.color_regs_ecs[pv] & 0xfff;
		}
#ifdef AGA
	} else if (currprefs.chipset_mask & CSMASK_AGA) {
		if (bplplanecnt >= 7) { /* AGA mode HAM8 */
			while (unpainted_amiga-- > 0) {
				int pv = pixdata.apixels[ham_decode_pixel++] ^ bplxor;
				switch (pv & 0x3)
				{
				case 0x0: ham_lastcolor = colors_for_drawing.color_regs_aga[pv >> 2] & 0xffffff; break;
				case 0x1: ham_lastcolor &= 0xFFFF03; ham_lastcolor |= (pv & 0xFC); break;
				case 0x2: ham_lastcolor &= 0x03FFFF; ham_lastcolor |= (pv & 0xFC) << 16; break;
				case 0x3: ham_lastcolor &= 0xFF03FF; ham_lastcolor |= (pv & 0xFC) << 8; break;
				}
			}
		} else { /* AGA mode HAM6 */
			while (unpainted_amiga-- > 0) {
				int pv = pixdata.apixels[ham_decode_pixel++] ^ bplxor;
				switch (pv & 0x30)
				{
				case 0x00: ham_lastcolor = colors_for_drawing.color_regs_aga[pv] & 0xffffff; break;
				case 0x10: ham_lastcolor &= 0xFFFF00; ham_lastcolor |= (pv & 0xF) << 4; break;
				case 0x20: ham_lastcolor &= 0x00FFFF; ham_lastcolor |= (pv & 0xF) << 20; break;
				case 0x30: ham_lastcolor &= 0xFF00FF; ham_lastcolor |= (pv & 0xF) << 12; break;
				}
			}
		}
#endif
	} else {
		/* OCS/ECS mode HAM6 */
		while (unpainted_amiga-- > 0) {
			int pv = pixdata.apixels[ham_decode_pixel++];
			switch (pv & 0x30)
			{
			case 0x00: ham_lastcolor = colors_for_drawing.color_regs_ecs[pv] & 0xfff; break;
			case 0x10: ham_lastcolor &= 0xFF0; ham_lastcolor |= (pv & 0xF); break;
			case 0x20: ham_lastcolor &= 0x0FF; ham_lastcolor |= (pv & 0xF) << 8; break;
			case 0x30: ham_lastcolor &= 0xF0F; ham_lastcolor |= (pv & 0xF) << 4; break;
			}
		}
	}
}

static void decode_ham (int pix, int stoppos, bool blank)
{
	int todraw_amiga = res_shift_from_window (stoppos - pix);

	if (!bplham) {
		while (todraw_amiga-- > 0) {
			int pv = pixdata.apixels[ham_decode_pixel];
#ifdef AGA
			if (currprefs.chipset_mask & CSMASK_AGA)
				ham_lastcolor = colors_for_drawing.color_regs_aga[pv ^ bplxor] & 0xffffff;
			else
#endif
				ham_lastcolor = colors_for_drawing.color_regs_ecs[pv] & 0xfff;

			ham_linebuf[ham_decode_pixel++] = ham_lastcolor;
		}
#ifdef AGA
	} else if (currprefs.chipset_mask & CSMASK_AGA) {
		if (bplplanecnt >= 7) { /* AGA mode HAM8 */
			while (todraw_amiga-- > 0) {
				int pv = pixdata.apixels[ham_decode_pixel] ^ bplxor;
				switch (pv & 0x3)
				{
				case 0x0: ham_lastcolor = colors_for_drawing.color_regs_aga[pv >> 2] & 0xffffff; break;
				case 0x1: ham_lastcolor &= 0xFFFF03; ham_lastcolor |= (pv & 0xFC); break;
				case 0x2: ham_lastcolor &= 0x03FFFF; ham_lastcolor |= (pv & 0xFC) << 16; break;
				case 0x3: ham_lastcolor &= 0xFF03FF; ham_lastcolor |= (pv & 0xFC) << 8; break;
				}
				ham_linebuf[ham_decode_pixel++] = ham_lastcolor;
			}
		} else { /* AGA mode HAM6 */
			while (todraw_amiga-- > 0) {
				int pv = pixdata.apixels[ham_decode_pixel] ^ bplxor;
				switch (pv & 0x30)
				{
				case 0x00: ham_lastcolor = colors_for_drawing.color_regs_aga[pv] & 0xffffff; break;
				case 0x10: ham_lastcolor &= 0xFFFF00; ham_lastcolor |= (pv & 0xF) << 4; break;
				case 0x20: ham_lastcolor &= 0x00FFFF; ham_lastcolor |= (pv & 0xF) << 20; break;
				case 0x30: ham_lastcolor &= 0xFF00FF; ham_lastcolor |= (pv & 0xF) << 12; break;
				}
				ham_linebuf[ham_decode_pixel++] = ham_lastcolor;
			}
		}
#endif
	} else {
		/* OCS/ECS mode HAM6 */
		while (todraw_amiga-- > 0) {
			int pv = pixdata.apixels[ham_decode_pixel];
			switch (pv & 0x30)
			{
			case 0x00: ham_lastcolor = colors_for_drawing.color_regs_ecs[pv] & 0xfff; break;
			case 0x10: ham_lastcolor &= 0xFF0; ham_lastcolor |= (pv & 0xF); break;
			case 0x20: ham_lastcolor &= 0x0FF; ham_lastcolor |= (pv & 0xF) << 8; break;
			case 0x30: ham_lastcolor &= 0xF0F; ham_lastcolor |= (pv & 0xF) << 4; break;
			}
			ham_linebuf[ham_decode_pixel++] = ham_lastcolor;
		}
	}
}

static void erase_ham_right_border(int pix, int stoppos, bool blank)
{
	if (stoppos < playfield_end)
		return;
	// erase right border in HAM modes or old HAM data may be visible
	// if DDFSTOP < DIWSTOP (Uridium II title screen)
	int todraw_amiga = res_shift_from_window (stoppos - pix);
	while (todraw_amiga-- > 0)
		ham_linebuf[ham_decode_pixel++] = 0;
}

static void gen_pfield_tables (void)
{
	int i;

	for (i = 0; i < 256; i++) {
		int plane1 = ((i >> 0) & 1) | ((i >> 1) & 2) | ((i >> 2) & 4) | ((i >> 3) & 8);
		int plane2 = ((i >> 1) & 1) | ((i >> 2) & 2) | ((i >> 3) & 4) | ((i >> 4) & 8);

		dblpf_2nd1[i] = plane1 == 0 && plane2 != 0;
		dblpf_2nd2[i] = plane2 != 0;

#ifdef AGA
		dblpf_ind1_aga[i] = plane1 == 0 ? plane2 : plane1;
		dblpf_ind2_aga[i] = plane2 == 0 ? plane1 : plane2;
#endif

		dblpf_ms1[i] = plane1 == 0 ? (plane2 == 0 ? 16 : 8) : 0;
		dblpf_ms2[i] = plane2 == 0 ? (plane1 == 0 ? 16 : 0) : 8;
		dblpf_ms[i] = i == 0 ? 16 : 8;

		if (plane2 > 0)
			plane2 += 8;
		dblpf_ind1[i] = i >= 128 ? i & 0x7F : (plane1 == 0 ? plane2 : plane1);
		dblpf_ind2[i] = i >= 128 ? i & 0x7F : (plane2 == 0 ? plane1 : plane2);

		// Hack for OCS/ECS-only dualplayfield chipset bug.
		// If PF2P2 is invalid (>5), playfield color becomes transparent but
		// playfield still hides playfield under it! (if plfpri is set)
		if (i & 64) {
			dblpf_ind2[i] = 0;
			dblpf_ind1[i] = 0;
		}

		sprite_offs[i] = (i & 15) ? 0 : 2;

		clxtab[i] = ((((i & 3) && (i & 12)) << 9)
			| (((i & 3) && (i & 48)) << 10)
			| (((i & 3) && (i & 192)) << 11)
			| (((i & 12) && (i & 48)) << 12)
			| (((i & 12) && (i & 192)) << 13)
			| (((i & 48) && (i & 192)) << 14));

	}

	memset (all_ones, 0xff, MAX_PIXELS_PER_LINE);

}

/* When looking at this function and the ones that inline it, bear in mind
what an optimizing compiler will do with this code.  All callers of this
function only pass in constant arguments (except for E).  This means
that many of the if statements will go away completely after inlining.  */
STATIC_INLINE void draw_sprites_1 (struct sprite_entry *e, int dualpf, int has_attach)
{
	uae_u16 *buf = spixels + e->first_pixel;
	uae_u8 *stbuf = spixstate.bytes + e->first_pixel;
	int spr_pos, pos;

	buf -= e->pos;
	stbuf -= e->pos;

	spr_pos = e->pos + ((DIW_DDF_OFFSET - DISPLAY_LEFT_SHIFT) << sprite_buffer_res);

	if (spr_pos < sprite_first_x)
		sprite_first_x = spr_pos;

	for (pos = e->pos; pos < e->max; pos++, spr_pos++) {
		if (spr_pos >= 0 && spr_pos < MAX_PIXELS_PER_LINE) {
			spritepixels[spr_pos].data = buf[pos];
			spritepixels[spr_pos].stdata = stbuf[pos];
			spritepixels[spr_pos].attach = has_attach;
		}
	}

	if (spr_pos > sprite_last_x)
		sprite_last_x = spr_pos;
}

/* See comments above.  Do not touch if you don't know what's going on.
* (We do _not_ want the following to be inlined themselves).  */
/* lores bitplane, lores sprites */
static void NOINLINE draw_sprites_normal_sp_nat (struct sprite_entry *e) { draw_sprites_1 (e, 0, 0); }
static void NOINLINE draw_sprites_normal_dp_nat (struct sprite_entry *e) { draw_sprites_1 (e, 1, 0); }
static void NOINLINE draw_sprites_normal_sp_at (struct sprite_entry *e) { draw_sprites_1 (e, 0, 1); }
static void NOINLINE draw_sprites_normal_dp_at (struct sprite_entry *e) { draw_sprites_1 (e, 1, 1); }

#ifdef AGA
/* not very optimized */
STATIC_INLINE void draw_sprites_aga (struct sprite_entry *e, int aga)
{
	draw_sprites_1 (e, bpldualpf, e->has_attached);
}
#endif

STATIC_INLINE void draw_sprites_ecs (struct sprite_entry *e)
{
	if (e->has_attached) {
		if (bpldualpf)
			draw_sprites_normal_dp_at (e);
		else
			draw_sprites_normal_sp_at (e);
	} else {
		if (bpldualpf)
			draw_sprites_normal_dp_nat (e);
		else
			draw_sprites_normal_sp_nat (e);
	}
}

#ifdef AGA
/* clear possible bitplane data outside DIW area */
static void clear_bitplane_border_aga (void)
{
	int len, shift = res_shift;
	uae_u8 v = 0;

	if (shift < 0) {
		shift = -shift;
		len = (real_playfield_start - playfield_start) << shift;
		memset (pixdata.apixels + pixels_offset + (playfield_start << shift), v, len);
		len = (playfield_end - real_playfield_end) << shift;
		memset (pixdata.apixels + pixels_offset + (real_playfield_end << shift), v, len);
	} else {
		len = (real_playfield_start - playfield_start) >> shift;
		memset (pixdata.apixels + pixels_offset + (playfield_start >> shift), v, len);
		len = (playfield_end - real_playfield_end) >> shift;
		memset (pixdata.apixels + pixels_offset + (real_playfield_end >> shift), v, len);
	}
}
#endif

static void weird_bitplane_fix (int start, int end)
{
	int sh = lores_shift;
	uae_u8 *p = pixdata.apixels + pixels_offset;

	start >>= sh;
	end >>= sh;
	if (bplplanecnt == 5 && !bpldualpf) {
		/* emulate OCS/ECS only undocumented "SWIV" hardware feature */
		for (int i = start; i < end; i++) {
			if (p[i] & 16)
				p[i] = 16;
		}
	} else if (bpldualpf && bpldualpfpri) {
		/* in dualplayfield mode this feature is even more strange.. */
		for (int i = start; i < end; i++) {
			if (p[i] & (2 | 8 | 32))
				p[i] |= 0x40;
		}
	} else if (bpldualpf && !bpldualpfpri) {
		for (int i = start; i < end; i++) {
			p[i] &= ~(2 | 8 | 32);
		}
	}
}

/* We use the compiler's inlining ability to ensure that PLANES is in effect a compile time
constant.  That will cause some unnecessary code to be optimized away.
Don't touch this if you don't know what you are doing.  */

#define MERGE(a,b,mask,shift) do {\
	uae_u32 tmp = mask & (a ^ (b >> shift)); \
	a ^= tmp; \
	b ^= (tmp << shift); \
} while (0)

#define GETLONG(P) (*(uae_u32 *)P)

STATIC_INLINE void pfield_doline_1 (uae_u32 *pixels, int wordcount, int planes)
{
	while (wordcount-- > 0) {
		uae_u32 b0, b1, b2, b3, b4, b5, b6, b7;

		b0 = 0, b1 = 0, b2 = 0, b3 = 0, b4 = 0, b5 = 0, b6 = 0, b7 = 0;
		switch (planes) {
#ifdef AGA
		case 8: b0 = GETLONG (real_bplpt[7]); real_bplpt[7] += 4;
		case 7: b1 = GETLONG (real_bplpt[6]); real_bplpt[6] += 4;
#endif
		case 6: b2 = GETLONG (real_bplpt[5]); real_bplpt[5] += 4;
		case 5: b3 = GETLONG (real_bplpt[4]); real_bplpt[4] += 4;
		case 4: b4 = GETLONG (real_bplpt[3]); real_bplpt[3] += 4;
		case 3: b5 = GETLONG (real_bplpt[2]); real_bplpt[2] += 4;
		case 2: b6 = GETLONG (real_bplpt[1]); real_bplpt[1] += 4;
		case 1: b7 = GETLONG (real_bplpt[0]); real_bplpt[0] += 4;
		}

		MERGE (b0, b1, 0x55555555, 1);
		MERGE (b2, b3, 0x55555555, 1);
		MERGE (b4, b5, 0x55555555, 1);
		MERGE (b6, b7, 0x55555555, 1);

		MERGE (b0, b2, 0x33333333, 2);
		MERGE (b1, b3, 0x33333333, 2);
		MERGE (b4, b6, 0x33333333, 2);
		MERGE (b5, b7, 0x33333333, 2);

		MERGE (b0, b4, 0x0f0f0f0f, 4);
		MERGE (b1, b5, 0x0f0f0f0f, 4);
		MERGE (b2, b6, 0x0f0f0f0f, 4);
		MERGE (b3, b7, 0x0f0f0f0f, 4);

		MERGE (b0, b1, 0x00ff00ff, 8);
		MERGE (b2, b3, 0x00ff00ff, 8);
		MERGE (b4, b5, 0x00ff00ff, 8);
		MERGE (b6, b7, 0x00ff00ff, 8);

		MERGE (b0, b2, 0x0000ffff, 16);
		do_put_mem_long (pixels, b0);
		do_put_mem_long (pixels + 4, b2);
		MERGE (b1, b3, 0x0000ffff, 16);
		do_put_mem_long (pixels + 2, b1);
		do_put_mem_long (pixels + 6, b3);
		MERGE (b4, b6, 0x0000ffff, 16);
		do_put_mem_long (pixels + 1, b4);
		do_put_mem_long (pixels + 5, b6);
		MERGE (b5, b7, 0x0000ffff, 16);
		do_put_mem_long (pixels + 3, b5);
		do_put_mem_long (pixels + 7, b7);
		pixels += 8;
	}
}

/* See above for comments on inlining.  These functions should _not_
be inlined themselves.  */
static void NOINLINE pfield_doline_n1 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 1); }
static void NOINLINE pfield_doline_n2 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 2); }
static void NOINLINE pfield_doline_n3 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 3); }
static void NOINLINE pfield_doline_n4 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 4); }
static void NOINLINE pfield_doline_n5 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 5); }
static void NOINLINE pfield_doline_n6 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 6); }
#ifdef AGA
static void NOINLINE pfield_doline_n7 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 7); }
static void NOINLINE pfield_doline_n8 (uae_u32 *data, int count) { pfield_doline_1 (data, count, 8); }
#endif

static void pfield_doline (int lineno)
{
	int wordcount = dp_for_drawing->plflinelen;
	uae_u32 *data = pixdata.apixels_l + MAX_PIXELS_PER_LINE / 4;

#ifdef SMART_UPDATE
#define DATA_POINTER(n) ((debug_bpl_mask & (1 << n)) ? (line_data[lineno] + (n) * MAX_WORDS_PER_LINE * 2) : (debug_bpl_mask_one ? all_ones : all_zeros))
	real_bplpt[0] = DATA_POINTER (0);
	real_bplpt[1] = DATA_POINTER (1);
	real_bplpt[2] = DATA_POINTER (2);
	real_bplpt[3] = DATA_POINTER (3);
	real_bplpt[4] = DATA_POINTER (4);
	real_bplpt[5] = DATA_POINTER (5);
#ifdef AGA
	real_bplpt[6] = DATA_POINTER (6);
	real_bplpt[7] = DATA_POINTER (7);
#endif
#endif

	switch (bplplanecnt) {
	default: break;
	case 0: memset (data, 0, wordcount * 32); break;
	case 1: pfield_doline_n1 (data, wordcount); break;
	case 2: pfield_doline_n2 (data, wordcount); break;
	case 3: pfield_doline_n3 (data, wordcount); break;
	case 4: pfield_doline_n4 (data, wordcount); break;
	case 5: pfield_doline_n5 (data, wordcount); break;
	case 6: pfield_doline_n6 (data, wordcount); break;
#ifdef AGA
	case 7: pfield_doline_n7 (data, wordcount); break;
	case 8: pfield_doline_n8 (data, wordcount); break;
#endif
	}
}

void init_row_map (void)
{
	static uae_u8 *oldbufmem;
	static int oldheight, oldpitch;
	static bool oldgenlock;
	int i, j;

	if (gfxvidinfo.drawbuffer.height_allocated > max_uae_height) {
		write_log (_T("Resolution too high, aborting\n"));
		abort ();
	}
	if (!row_map) {
		row_map = xmalloc(uae_u8*, max_uae_height + 1);
		row_map_genlock = xmalloc(uae_u8*, max_uae_height + 1);
	}

	if (oldbufmem && oldbufmem == gfxvidinfo.drawbuffer.bufmem &&
		oldheight == gfxvidinfo.drawbuffer.height_allocated &&
		oldpitch == gfxvidinfo.drawbuffer.rowbytes &&
		oldgenlock == init_genlock_data)
		return;
	xfree(row_map_genlock_buffer);
	row_map_genlock_buffer = NULL;
	if (init_genlock_data) {
		row_map_genlock_buffer = xcalloc(uae_u8, gfxvidinfo.drawbuffer.width_allocated * (gfxvidinfo.drawbuffer.height_allocated + 2));
	}
	j = oldheight == 0 ? max_uae_height : oldheight;
	for (i = gfxvidinfo.drawbuffer.height_allocated; i < max_uae_height + 1 && i < j + 1; i++) {
		row_map[i] = row_tmp;
		row_map_genlock[i] = row_tmp;
	}
	for (i = 0, j = 0; i < gfxvidinfo.drawbuffer.height_allocated; i++, j += gfxvidinfo.drawbuffer.rowbytes) {
		row_map[i] = gfxvidinfo.drawbuffer.bufmem + j;
		if (init_genlock_data) {
			row_map_genlock[i] = row_map_genlock_buffer + gfxvidinfo.drawbuffer.width_allocated * (i + 1);
		} else {
			row_map_genlock[i] = NULL;
		}
	}
	oldbufmem = gfxvidinfo.drawbuffer.bufmem;
	oldheight = gfxvidinfo.drawbuffer.height_allocated;
	oldpitch = gfxvidinfo.drawbuffer.rowbytes;
	oldgenlock = init_genlock_data;
}

static void init_aspect_maps (void)
{
	int i, maxl, h;

	h = gfxvidinfo.drawbuffer.height_allocated;

	if (h == 0)
		/* Do nothing if the gfx driver hasn't initialized the screen yet */
		return;

	linedbld = linedbl = currprefs.gfx_vresolution;
	if (doublescan > 0 && interlace_seen <= 0) {
		linedbl = 0;
		linedbld = 1;
	}

	if (native2amiga_line_map)
		xfree (native2amiga_line_map);
	if (amiga2aspect_line_map)
		xfree (amiga2aspect_line_map);

	/* At least for this array the +1 is necessary. */
	amiga2aspect_line_map = xmalloc (int, (MAXVPOS + 1) * 2 + 1);
	native2amiga_line_map = xmalloc (int, h);

	maxl = (MAXVPOS + 1) << linedbld;
	min_ypos_for_screen = minfirstline << linedbl;
	max_drawn_amiga_line = -1;
	for (i = 0; i < maxl; i++) {
		int v = i - min_ypos_for_screen;
		if (v >= h && max_drawn_amiga_line < 0)
			max_drawn_amiga_line = v;
		if (i < min_ypos_for_screen || v >= h)
			v = -1;
		amiga2aspect_line_map[i] = v;
	}
	if (max_drawn_amiga_line < 0)
		max_drawn_amiga_line = maxl - min_ypos_for_screen;

	for (i = 0; i < h; i++)
		native2amiga_line_map[i] = -1;

	for (i = maxl - 1; i >= min_ypos_for_screen; i--) {
		int j;
		if (amiga2aspect_line_map[i] == -1)
			continue;
		for (j = amiga2aspect_line_map[i]; j < h && native2amiga_line_map[j] == -1; j++)
			native2amiga_line_map[j] = i >> linedbl;
	}

	gfxvidinfo.xchange = 1 << (RES_MAX - currprefs.gfx_resolution);
	gfxvidinfo.ychange = linedbl ? 1 : 2;

	visible_left_start = 0;
	visible_right_stop = MAX_STOP;
	visible_top_start = 0;
	visible_bottom_stop = MAX_STOP;
	set_blanking_limits ();
}

/*
* A raster line has been built in the graphics buffer. Tell the graphics code
* to do anything necessary to display it.
*/
static void do_flush_line_1 (struct vidbuffer *vb, int lineno)
{
	if (lineno < first_drawn_line)
		first_drawn_line = lineno;
	if (lineno > last_drawn_line)
		last_drawn_line = lineno;

	if (gfxvidinfo.maxblocklines == 0)
		flush_line (vb, lineno);
	else {
		if ((last_block_line + 2) < lineno) {
			if (first_block_line != NO_BLOCK)
				flush_block (vb, first_block_line, last_block_line);
			first_block_line = lineno;
		}
		last_block_line = lineno;
		if (last_block_line - first_block_line >= gfxvidinfo.maxblocklines) {
			flush_block (vb, first_block_line, last_block_line);
			first_block_line = last_block_line = NO_BLOCK;
		}
	}
}

STATIC_INLINE void do_flush_line (struct vidbuffer *vb, int lineno)
{
	if (vb)
		do_flush_line_1 (vb, lineno);
}

/*
* One drawing frame has been finished. Tell the graphics code about it.
* Note that the actual flush_screen() call is a no-op for all reasonable
* systems.
*/

static void do_flush_screen (struct vidbuffer *vb, int start, int stop)
{
	/* TODO: this flush operation is executed outside locked state!
	Should be corrected.
	(sjo 26.9.99) */

	if (vb != gfxvidinfo.outbuffer)
		return;

	xlinecheck (start, stop);
	if (gfxvidinfo.maxblocklines != 0 && first_block_line != NO_BLOCK) {
		flush_block (vb, first_block_line, last_block_line);
	}
	unlockscr (vb);
	if (start <= stop)
		flush_screen (vb, start, stop);
	else if (isvsync_chipset ())
		flush_screen (vb, 0, 0); /* vsync mode */
}

/* We only save hardware registers during the hardware frame. Now, when
* drawing the frame, we expand the data into a slightly more useful
* form. */
static void pfield_expand_dp_bplcon (void)
{
	bool pfield_mode_changed = false;

	bplres = dp_for_drawing->bplres;
	bplplanecnt = dp_for_drawing->nr_planes;
	bplham = dp_for_drawing->ham_seen;
	bplehb = dp_for_drawing->ehb_seen;
	if ((currprefs.chipset_mask & CSMASK_ECS_DENISE) && (dp_for_drawing->bplcon2 & 0x0200))
		bplehb = 0;
	issprites = dip_for_drawing->nr_sprites > 0;
#ifdef ECS_DENISE
	int oecsshres = ecsshres;
	ecsshres = bplres == RES_SUPERHIRES && (currprefs.chipset_mask & CSMASK_ECS_DENISE) && !(currprefs.chipset_mask & CSMASK_AGA);
	pfield_mode_changed = oecsshres != ecsshres;
#endif

	plf1pri = dp_for_drawing->bplcon2 & 7;
	plf2pri = (dp_for_drawing->bplcon2 >> 3) & 7;
	plf_sprite_mask = 0xFFFF0000 << (4 * plf2pri);
	plf_sprite_mask |= (0x0000FFFF << (4 * plf1pri)) & 0xFFFF;
	bpldualpf = (dp_for_drawing->bplcon0 & 0x400) == 0x400;
	bpldualpfpri = (dp_for_drawing->bplcon2 & 0x40) == 0x40;

#ifdef AGA
	bpldualpf2of = (dp_for_drawing->bplcon3 >> 10) & 7;
	sbasecol[0] = ((dp_for_drawing->bplcon4 >> 4) & 15) << 4;
	sbasecol[1] = ((dp_for_drawing->bplcon4 >> 0) & 15) << 4;
	bplxor = dp_for_drawing->bplcon4 >> 8;
	int obpldelay_sh = bpldelay_sh;
	bpldelay_sh = dp_for_drawing->bplcon2 >> 14;
	if ((bpldelay_sh && !obpldelay_sh) || (!bpldelay_sh && obpldelay_sh))
		pfield_mode_changed = true;
#endif
	ecs_genlock_features_active = (currprefs.chipset_mask & CSMASK_ECS_DENISE) && ((dp_for_drawing->bplcon2 & 0x0c00) || colors_for_drawing.borderntrans) ? 1 : 0;
	if (ecs_genlock_features_active) {
		ecs_genlock_features_colorkey = false;
		ecs_genlock_features_mask = 0;
		if (dp_for_drawing->bplcon3 & 0x0800) {
			ecs_genlock_features_mask = 1 << ((dp_for_drawing->bplcon2 >> 12) & 7);
		} 
		if (dp_for_drawing->bplcon3 & 0x0400) {
			ecs_genlock_features_colorkey = true;
		}
	}
	if (pfield_mode_changed)
		pfield_set_linetoscr();
}

static bool isham (uae_u16 bplcon0)
{
	int p = GET_PLANES (bplcon0);
	if (!(bplcon0 & 0x800))
		return 0;
	if (currprefs.chipset_mask & CSMASK_AGA) {
		// AGA only has 6 or 8 plane HAM
		if (p == 6 || p == 8)
			return 1;
	} else {
		// OCS/ECS also supports 5 plane HAM
		if (GET_RES_DENISE (bplcon0) > 0)
			return 0;
		if (p >= 5)
			return 1;
	}
	return 0;
}

static void pfield_expand_dp_bplconx (int regno, int v)
{
	if (regno == 0xffff) {
		hposblank = 1;
		return;
	}
	regno -= 0x1000;
	switch (regno)
	{
	case 0x100: // BPLCON0
		dp_for_drawing->bplcon0 = v;
		dp_for_drawing->bplres = GET_RES_DENISE (v);
		dp_for_drawing->nr_planes = GET_PLANES (v);
		dp_for_drawing->ham_seen = isham (v);
		break;
	case 0x104: // BPLCON2
		dp_for_drawing->bplcon2 = v;
		break;
#ifdef ECS_DENISE
	case 0x106: // BPLCON3
		dp_for_drawing->bplcon3 = v;
		break;
#endif
#ifdef AGA
	case 0x10c: // BPLCON4
		dp_for_drawing->bplcon4 = v;
		break;
#endif
	}
	pfield_expand_dp_bplcon ();
	set_res_shift(lores_shift - bplres);
}

static int drawing_color_matches;
static enum { color_match_acolors, color_match_full } color_match_type;

/* Set up colors_for_drawing to the state at the beginning of the currently drawn
line.  Try to avoid copying color tables around whenever possible.  */
static void adjust_drawing_colors (int ctable, int need_full)
{
	if (drawing_color_matches != ctable || need_full < 0) {
		if (need_full) {
			color_reg_cpy (&colors_for_drawing, curr_color_tables + ctable);
			color_match_type = color_match_full;
		} else {
			memcpy (colors_for_drawing.acolors, curr_color_tables[ctable].acolors,
				sizeof colors_for_drawing.acolors);
			colors_for_drawing.borderblank = curr_color_tables[ctable].borderblank;
			colors_for_drawing.bordersprite = curr_color_tables[ctable].bordersprite;
			color_match_type = color_match_acolors;
		}
		drawing_color_matches = ctable;
	} else if (need_full && color_match_type != color_match_full) {
		color_reg_cpy (&colors_for_drawing, &curr_color_tables[ctable]);
		color_match_type = color_match_full;
	}
}

static void playfield_hard_way(line_draw_func worker_pfield, int first, int last)
{
	if (first < real_playfield_start)  {
		int next = last < real_playfield_start ? last : real_playfield_start;
		int diff = next - first;
		pfield_do_linetoscr_bordersprite_aga(first, next, false);
		if (res_shift >= 0)
			diff >>= res_shift;
		else
			diff <<= res_shift;
		src_pixel += diff;
		first = next;
	}
	(*worker_pfield)(first, last < real_playfield_end ? last : real_playfield_end, false);
	if (last > real_playfield_end)
		pfield_do_linetoscr_bordersprite_aga(real_playfield_end, last, false);
}

static void do_color_changes (line_draw_func worker_border, line_draw_func worker_pfield, int vp)
{
	int i;
	int lastpos = visible_left_border;
	int endpos = visible_left_border + gfxvidinfo.drawbuffer.inwidth;

	for (i = dip_for_drawing->first_color_change; i <= dip_for_drawing->last_color_change; i++) {
		int regno = curr_color_changes[i].regno;
		unsigned int value = curr_color_changes[i].value;
		int nextpos, nextpos_in_range;

		if (i == dip_for_drawing->last_color_change)
			nextpos = endpos;
		else
			nextpos = coord_hw_to_window_x (curr_color_changes[i].linepos);

		nextpos_in_range = nextpos;
		if (nextpos > endpos)
			nextpos_in_range = endpos;

		// left hblank (left edge to hblank end)
		if (nextpos_in_range > lastpos && lastpos < hblank_left_start) {
			int t = nextpos_in_range <= hblank_left_start ? nextpos_in_range : hblank_left_start;
			(*worker_border) (lastpos, t, true);
			lastpos = t;
		}

		// left border (hblank end to playfield start)
		if (nextpos_in_range > lastpos && lastpos < playfield_start) {
			int t = nextpos_in_range <= playfield_start ? nextpos_in_range : playfield_start;
			(*worker_border) (lastpos, t, false);
			lastpos = t;
		}

		// playfield
		if (nextpos_in_range > lastpos && lastpos >= playfield_start && lastpos < playfield_end) {
			int t = nextpos_in_range <= playfield_end ? nextpos_in_range : playfield_end;
			if (plf2pri > 5 && !(currprefs.chipset_mask & CSMASK_AGA))
				weird_bitplane_fix (lastpos, t);
			if (bplxor && may_require_hard_way && worker_pfield != pfield_do_linetoscr_bordersprite_aga)
				playfield_hard_way(worker_pfield, lastpos, t);
			else
				(*worker_pfield) (lastpos, t, false);
			lastpos = t;
		}

		// right border (playfield end to hblank start)
		if (nextpos_in_range > lastpos && lastpos >= playfield_end) {
			int t = nextpos_in_range <= hblank_right_stop ? nextpos_in_range : hblank_right_stop;
			(*worker_border) (lastpos, t, false);
			lastpos = t;
		}

		// right hblank (hblank start to right edge, hblank start may be earlier than playfield end)
		if (nextpos_in_range > hblank_right_stop) {
			(*worker_border) (hblank_right_stop, nextpos_in_range, true);
			lastpos = nextpos_in_range;
		}

		if (regno >= 0x1000) {
			pfield_expand_dp_bplconx (regno, value);
		} else if (regno >= 0) {
			if (regno == 0 && (value & COLOR_CHANGE_BRDBLANK)) {
				colors_for_drawing.borderblank = (value & 1) != 0;
				colors_for_drawing.bordersprite = (value & 3) == 2;
				colors_for_drawing.borderntrans = (value & 5) == 4;
			} else {
				color_reg_set (&colors_for_drawing, regno, value);
				colors_for_drawing.acolors[regno] = getxcolor (value);
			}
		}
		if (lastpos >= endpos)
			break;
	}
#if 1
	if (vp < visible_top_start || vp >= visible_bottom_stop) {
		// outside of visible area
		// Just overwrite with black. Above code needs to run because of custom registers,
		// not worth the trouble for separate code path just for max 10 lines or so
		(*worker_border) (visible_left_border, visible_left_border + gfxvidinfo.drawbuffer.inwidth, true);
	}
#endif
}

STATIC_INLINE bool is_color_changes(struct draw_info *di)
{
	int regno = curr_color_changes[di->first_color_change].regno;
	int changes = di->nr_color_changes;
	return changes > 1 || (changes == 1 && regno != 0xffff && regno != -1);
}

enum double_how {
	dh_buf,
	dh_line,
	dh_emerg
};

static void pfield_draw_line (struct vidbuffer *vb, int lineno, int gfx_ypos, int follow_ypos)
{
	static int warned = 0;
	int border = 0;
	int do_double = 0;
	bool have_color_changes;
	enum double_how dh;
	int ls = linestate[lineno];

	dp_for_drawing = line_decisions + lineno;
	dip_for_drawing = curr_drawinfo + lineno;

	if (dp_for_drawing->plfleft >= 0) {
		lines_count++;
		resolution_count[dp_for_drawing->bplres]++;
	}

	switch (ls)
	{
	case LINE_REMEMBERED_AS_PREVIOUS:
//		if (!warned) // happens when program messes up with VPOSW
//			write_log (_T("Shouldn't get here... this is a bug.\n")), warned++;
		return;

	case LINE_BLACK:
		linestate[lineno] = LINE_REMEMBERED_AS_BLACK;
		border = -1;
		break;

	case LINE_REMEMBERED_AS_BLACK:
		return;

	case LINE_AS_PREVIOUS:
		dp_for_drawing--;
		dip_for_drawing--;
		linestate[lineno] = LINE_DONE_AS_PREVIOUS;
		if (dp_for_drawing->plfleft < 0)
			border = 1;
		break;

	case LINE_DONE_AS_PREVIOUS:
		/* fall through */
	case LINE_DONE:
		return;

	case LINE_DECIDED_DOUBLE:
		if (follow_ypos >= 0) {
			do_double = 1;
			linestate[lineno + 1] = LINE_DONE_AS_PREVIOUS;
		}

		/* fall through */
	default:
		if (dp_for_drawing->plfleft < 0)
			border = 1;
		linestate[lineno] = LINE_DONE;
		break;
	}

	have_color_changes = is_color_changes(dip_for_drawing);

	dh = dh_line;
	xlinebuffer = gfxvidinfo.drawbuffer.linemem;
	if (xlinebuffer == 0 && do_double
		&& (border == 0 || have_color_changes))
		xlinebuffer = gfxvidinfo.drawbuffer.emergmem, dh = dh_emerg;
	if (xlinebuffer == 0)
		xlinebuffer = row_map[gfx_ypos], dh = dh_buf;
	xlinebuffer -= linetoscr_x_adjust_pixbytes;
	xlinebuffer_genlock = row_map_genlock[gfx_ypos] - linetoscr_x_adjust_pixels;

	if (border == 0) {

		pfield_expand_dp_bplcon ();
		pfield_init_linetoscr (false);
		pfield_doline (lineno);

		adjust_drawing_colors (dp_for_drawing->ctable, dp_for_drawing->ham_seen || bplehb || ecsshres);

		/* The problem is that we must call decode_ham() BEFORE we do the sprites. */
		if (dp_for_drawing->ham_seen) {
			int ohposblank = hposblank;
			init_ham_decoding ();
			do_color_changes (dummy_worker, decode_ham, lineno);
			if (have_color_changes) {
				// do_color_changes() did color changes, reset colors back to original state
				adjust_drawing_colors (dp_for_drawing->ctable, -1);
				pfield_expand_dp_bplcon ();
			}
			hposblank = ohposblank;
			ham_decode_pixel = src_pixel;
			bplham = dp_for_drawing->ham_at_start;
		}

		if (dip_for_drawing->nr_sprites) {
			int i;
#ifdef AGA
			if (colors_for_drawing.bordersprite && dp_for_drawing->bordersprite_seen && !colors_for_drawing.borderblank)
				clear_bitplane_border_aga ();
#endif

			for (i = 0; i < dip_for_drawing->nr_sprites; i++) {
#ifdef AGA
				if (currprefs.chipset_mask & CSMASK_AGA)
					draw_sprites_aga (curr_sprite_entries + dip_for_drawing->first_sprite_entry + i, 1);
				else
#endif
					draw_sprites_ecs (curr_sprite_entries + dip_for_drawing->first_sprite_entry + i);
			}
		}

#ifdef AGA
		if (dip_for_drawing->nr_sprites && colors_for_drawing.bordersprite && !colors_for_drawing.borderblank && dp_for_drawing->bordersprite_seen)
			do_color_changes (pfield_do_linetoscr_bordersprite_aga, pfield_do_linetoscr_spr, lineno);
		else
#endif
			do_color_changes (pfield_do_fill_line, dip_for_drawing->nr_sprites ? pfield_do_linetoscr_spr : pfield_do_linetoscr, lineno);

		if (dh == dh_emerg)
			memcpy (row_map[gfx_ypos], xlinebuffer + linetoscr_x_adjust_pixbytes, gfxvidinfo.drawbuffer.pixbytes * gfxvidinfo.drawbuffer.inwidth);

		do_flush_line (vb, gfx_ypos);
		if (do_double) {
			if (dh == dh_emerg)
				memcpy (row_map[follow_ypos], xlinebuffer + linetoscr_x_adjust_pixbytes, gfxvidinfo.drawbuffer.pixbytes * gfxvidinfo.drawbuffer.inwidth);
			else if (dh == dh_buf)
				memcpy (row_map[follow_ypos], row_map[gfx_ypos], gfxvidinfo.drawbuffer.pixbytes * gfxvidinfo.drawbuffer.inwidth);
			if (need_genlock_data)
				memcpy(row_map_genlock[follow_ypos], row_map_genlock[gfx_ypos], gfxvidinfo.drawbuffer.inwidth);
			do_flush_line (vb, follow_ypos);
		}

		if (dip_for_drawing->nr_sprites)
			pfield_erase_hborder_sprites ();

	} else if (border > 0) { // border > 0: top or bottom border

		bool dosprites = false;

		adjust_drawing_colors (dp_for_drawing->ctable, 0);

#ifdef AGA /* this makes things complex.. */
		if (dp_for_drawing->bordersprite_seen && !colors_for_drawing.borderblank && dip_for_drawing->nr_sprites) {
			dosprites = true;
			pfield_expand_dp_bplcon ();
			pfield_init_linetoscr (true);
			pfield_erase_vborder_sprites ();
		}
#endif

		if (!dosprites && !have_color_changes) {
			if (dp_for_drawing->plfleft < -1) {
				// blanked border line
				int tmp = hposblank;
				hposblank = 1;
				fill_line_border(lineno);
				hposblank = tmp;
			} else {
				// normal border line
				fill_line_border(lineno);
			}

			do_flush_line (vb, gfx_ypos);
			if (do_double) {
				if (dh == dh_buf) {
					xlinebuffer = row_map[follow_ypos] - linetoscr_x_adjust_pixbytes;
					xlinebuffer_genlock = row_map_genlock[follow_ypos] - linetoscr_x_adjust_pixels;
					fill_line_border(lineno);
				}
				/* If dh == dh_line, do_flush_line will re-use the rendered line
				* from linemem.  */
				do_flush_line (vb, follow_ypos);
			}
			return;
		}

#ifdef AGA
		if (dosprites) {

			for (int i = 0; i < dip_for_drawing->nr_sprites; i++)
				draw_sprites_aga (curr_sprite_entries + dip_for_drawing->first_sprite_entry + i, 1);
			do_color_changes (pfield_do_linetoscr_bordersprite_aga, pfield_do_linetoscr_bordersprite_aga, lineno);
#else
		if (0) {
#endif

		} else {

			playfield_start = visible_right_border;
			playfield_end = visible_right_border;
			do_color_changes (pfield_do_fill_line, pfield_do_fill_line, lineno);

		}

		if (dh == dh_emerg)
			memcpy (row_map[gfx_ypos], xlinebuffer + linetoscr_x_adjust_pixbytes, gfxvidinfo.drawbuffer.pixbytes * gfxvidinfo.drawbuffer.inwidth);
		do_flush_line (vb, gfx_ypos);
		if (do_double) {
			if (dh == dh_emerg)
				memcpy (row_map[follow_ypos], xlinebuffer + linetoscr_x_adjust_pixbytes, gfxvidinfo.drawbuffer.pixbytes * gfxvidinfo.drawbuffer.inwidth);
			else if (dh == dh_buf)
				memcpy (row_map[follow_ypos], row_map[gfx_ypos], gfxvidinfo.drawbuffer.pixbytes * gfxvidinfo.drawbuffer.inwidth);
			if (need_genlock_data)
				memcpy(row_map_genlock[follow_ypos], row_map_genlock[gfx_ypos], gfxvidinfo.drawbuffer.inwidth);
			do_flush_line(vb, follow_ypos);
		}

	} else {

		// top or bottom blanking region
		int tmp = hposblank;
		hposblank = 1;
		fill_line_border(lineno);
		hposblank = tmp;
		do_flush_line(vb, gfx_ypos);

	}
}

static void center_image (void)
{
	int prev_x_adjust = visible_left_border;
	int prev_y_adjust = thisframe_y_adjust;

	int w = gfxvidinfo.drawbuffer.inwidth;
	if (currprefs.gfx_xcenter && !currprefs.gf[0].gfx_filter_autoscale && max_diwstop > 0) {

		if (max_diwstop - min_diwstart < w && currprefs.gfx_xcenter == 2)
			/* Try to center. */
			visible_left_border = (max_diwstop - min_diwstart - w) / 2 + min_diwstart;
		else
			visible_left_border = max_diwstop - w - (max_diwstop - min_diwstart - w) / 2;
		visible_left_border &= ~((xshift (1, lores_shift)) - 1);
#if 1
		if (!center_reset && !vertical_changed) {
			/* Would the old value be good enough? If so, leave it as it is if we want to be clever. */
			if (currprefs.gfx_xcenter == 2) {
				if (visible_left_border < prev_x_adjust && prev_x_adjust < min_diwstart && min_diwstart - visible_left_border <= 32)
					visible_left_border = prev_x_adjust;
			}
		}
#endif
	} else if (gfxvidinfo.drawbuffer.extrawidth) {
		visible_left_border = max_diwlastword - w;
		if (gfxvidinfo.drawbuffer.extrawidth > 0)
			visible_left_border += gfxvidinfo.drawbuffer.extrawidth << currprefs.gfx_resolution;
	} else {
		if (gfxvidinfo.drawbuffer.inxoffset < 0) {
			visible_left_border = 0;
		} else {
			visible_left_border = gfxvidinfo.drawbuffer.inxoffset - DISPLAY_LEFT_SHIFT;
		}
	}

	if (visible_left_border > max_diwlastword - 32)
		visible_left_border = max_diwlastword - 32;
	if (visible_left_border < 0)
		visible_left_border = 0;
	visible_left_border &= ~((xshift (1, lores_shift)) - 1);

	//write_log (_T("%d %d %d %d %d\n"), max_diwlastword, gfxvidinfo.drawbuffer.width, lores_shift, currprefs.gfx_resolution, visible_left_border);

	linetoscr_x_adjust_pixels = visible_left_border;
	linetoscr_x_adjust_pixbytes = linetoscr_x_adjust_pixels * gfxvidinfo.drawbuffer.pixbytes;

	visible_right_border = visible_left_border + w;
	if (visible_right_border > max_diwlastword)
		visible_right_border = max_diwlastword;

	int max_drawn_amiga_line_tmp = max_drawn_amiga_line;
	if (max_drawn_amiga_line_tmp > gfxvidinfo.drawbuffer.inheight)
		max_drawn_amiga_line_tmp = gfxvidinfo.drawbuffer.inheight;
	max_drawn_amiga_line_tmp >>= linedbl;
	
	thisframe_y_adjust = minfirstline;
	if (currprefs.gfx_ycenter && thisframe_first_drawn_line >= 0 && !currprefs.gf[0].gfx_filter_autoscale) {

		if (thisframe_last_drawn_line - thisframe_first_drawn_line < max_drawn_amiga_line_tmp && currprefs.gfx_ycenter == 2)
			thisframe_y_adjust = (thisframe_last_drawn_line - thisframe_first_drawn_line - max_drawn_amiga_line_tmp) / 2 + thisframe_first_drawn_line;
		else
			thisframe_y_adjust = thisframe_first_drawn_line;
#if 1
		/* Would the old value be good enough? If so, leave it as it is if we want to be clever. */
		if (!center_reset && !horizontal_changed) {
			if (currprefs.gfx_ycenter == 2 && thisframe_y_adjust != prev_y_adjust) {
				if (prev_y_adjust <= thisframe_first_drawn_line && prev_y_adjust + max_drawn_amiga_line_tmp > thisframe_last_drawn_line)
					thisframe_y_adjust = prev_y_adjust;
			}
		}
#endif
	}

	/* Make sure the value makes sense */
	if (thisframe_y_adjust + max_drawn_amiga_line_tmp > maxvpos + maxvpos / 2)
		thisframe_y_adjust = maxvpos + maxvpos / 2 - max_drawn_amiga_line_tmp;
	if (thisframe_y_adjust < 0)
		thisframe_y_adjust = 0;

	thisframe_y_adjust_real = thisframe_y_adjust << linedbl;
	max_ypos_thisframe = (maxvpos_display - minfirstline + 1) << linedbl;

	if (prev_x_adjust != visible_left_border || prev_y_adjust != thisframe_y_adjust)
		frame_redraw_necessary |= interlace_seen > 0 && linedbl ? 2 : 1;

	max_diwstop = 0;
	min_diwstart = MAX_STOP;

	gfxvidinfo.drawbuffer.xoffset = (DISPLAY_LEFT_SHIFT << RES_MAX) + (visible_left_border << (RES_MAX - currprefs.gfx_resolution));
	gfxvidinfo.drawbuffer.yoffset = thisframe_y_adjust << VRES_MAX;

	center_reset = false;
	horizontal_changed = false;
	vertical_changed = false;
}

static int frame_res_cnt;
static int autoswitch_old_resolution;
static void init_drawing_frame (void)
{
	int i, maxline;
	static int frame_res_old;

	if (currprefs.gfx_resolution == changed_prefs.gfx_resolution && lines_count > 0) {
		int largest_count = 0;
		int largest_count_res = 0;
		int largest_res = 0;
		for (int i = 0; i <= RES_MAX; i++) {
			if (resolution_count[i])
				largest_res = i;
			if (resolution_count[i] >= largest_count) {
				largest_count = resolution_count[i];
				largest_count_res = i;
			}
		}

		if (currprefs.gfx_autoresolution_vga && programmedmode && gfxvidinfo.gfx_resolution_reserved >= RES_HIRES && gfxvidinfo.gfx_vresolution_reserved >= VRES_DOUBLE) {
			if (largest_res == RES_SUPERHIRES && (gfxvidinfo.gfx_resolution_reserved < RES_SUPERHIRES || gfxvidinfo.gfx_vresolution_reserved < 1)) {
				// enable full doubling/superhires support if programmed mode. It may be "half-width" only and may fit in normal display window.
				gfxvidinfo.gfx_resolution_reserved = RES_SUPERHIRES;
				gfxvidinfo.gfx_vresolution_reserved = VRES_DOUBLE;
				graphics_reset(false);
			}
			int newres = largest_res;
			if (htotal < 190)
				newres = largest_res + 1;
			if (newres < RES_HIRES)
				newres = RES_HIRES;
			if (newres > RES_MAX)
				newres = RES_MAX;
			if (changed_prefs.gfx_resolution != newres) {
				autoswitch_old_resolution = RES_HIRES;
				write_log(_T("Programmed mode autores = %d -> %d (%d)\n"), changed_prefs.gfx_resolution, newres, largest_res);
				changed_prefs.gfx_resolution = newres;
				set_config_changed();
				return;
			}
		} else if (autoswitch_old_resolution == RES_HIRES) {
			autoswitch_old_resolution = 0;
			if (changed_prefs.gfx_resolution != RES_HIRES) {
				changed_prefs.gfx_resolution = RES_HIRES;
				set_config_changed();
				return;
			}
		}

		if (currprefs.gfx_autoresolution) {
			int frame_res_detected;
			int frame_res_lace_detected = frame_res_lace;

			if (currprefs.gfx_autoresolution == 1 || currprefs.gfx_autoresolution >= 100)
				frame_res_detected = largest_res;
			else if (largest_count * 100 / lines_count >= currprefs.gfx_autoresolution)
				frame_res_detected = largest_count_res;
			else
				frame_res_detected = largest_count_res - 1;
			if (frame_res_detected < 0)
				frame_res_detected = 0;
	#if 0
			static int delay;
			delay--;
			if (delay < 0) {
				delay = 50;
				write_log (_T("%d %d, %d %d %d, %d %d, %d %d\n"), currprefs.gfx_autoresolution, lines_count, resolution_count[0], resolution_count[1], resolution_count[2],
					largest_count, largest_count_res, frame_res_detected, frame_res_lace_detected);
			}
	#endif
			if (frame_res_detected >= 0 && frame_res_lace_detected >= 0) {
				if (frame_res_cnt > 0 && frame_res_old == frame_res_detected * 2 + frame_res_lace_detected) {
					frame_res_cnt--;
					if (frame_res_cnt == 0) {
						int m = frame_res_detected * 2 + frame_res_lace_detected;
						struct wh *dst = currprefs.gfx_apmode[0].gfx_fullscreen ? &changed_prefs.gfx_size_fs : &changed_prefs.gfx_size_win;
						while (m < 3 * 2) {
							struct wh *src = currprefs.gfx_apmode[0].gfx_fullscreen ? &currprefs.gfx_size_fs_xtra[m] : &currprefs.gfx_size_win_xtra[m];
							if ((src->width > 0 && src->height > 0) || (currprefs.gfx_api || currprefs.gf[0].gfx_filter > 0)) {
								int nr = m >> 1;
								int nl = (m & 1) == 0 ? 0 : 1;
								int nr_o = nr;
								int nl_o = nl;

								if (currprefs.gfx_autoresolution >= 100 && nl == 0 && nr > 0) {
									nl = 1;
								}

								if (currprefs.gfx_autoresolution_minh < 0) {
									if (nr < nl)
										nr = nl;
								} else if (nr < currprefs.gfx_autoresolution_minh) {
									nr = currprefs.gfx_autoresolution_minh;
								}
								if (currprefs.gfx_autoresolution_minv < 0) {
									if (nl < nr)
										nl = nr;
								} else if (nl < currprefs.gfx_autoresolution_minv) {
									nl = currprefs.gfx_autoresolution_minv;
								}

								if (nr > gfxvidinfo.gfx_resolution_reserved)
									nr = gfxvidinfo.gfx_resolution_reserved;
								if (nl > gfxvidinfo.gfx_vresolution_reserved)
									nl = gfxvidinfo.gfx_vresolution_reserved;

								if (changed_prefs.gfx_resolution != nr || changed_prefs.gfx_vresolution != nl) {
									changed_prefs.gfx_resolution = nr;
									changed_prefs.gfx_vresolution = nl;

									write_log (_T("RES -> %d (%d) LINE -> %d (%d) (%d - %d, %d - %d)\n"), nr, nr_o, nl, nl_o,
										currprefs.gfx_autoresolution_minh, currprefs.gfx_autoresolution_minv,
										gfxvidinfo.gfx_resolution_reserved, gfxvidinfo.gfx_vresolution_reserved);
									set_config_changed ();
									//activate_debugger ();
								}
								if (src->width > 0 && src->height > 0) {
									if (memcmp (dst, src, sizeof *dst)) {
										*dst = *src;
										set_config_changed ();
									}
								}
								break;
							}
							m++;
						}
						frame_res_cnt = currprefs.gfx_autoresolution_delay;
					}
				} else {
					frame_res_old = frame_res_detected * 2 + frame_res_lace_detected;
					frame_res_cnt = currprefs.gfx_autoresolution_delay;
					if (frame_res_cnt <= 0)
						frame_res_cnt = 1;
				}
			}
		}
	}
	for (int i = 0; i <= RES_MAX; i++)
		resolution_count[i] = 0;
	lines_count = 0;
	frame_res = -1;
	frame_res_lace = 0;

	if (can_use_lores > AUTO_LORES_FRAMES && 0) {
		lores_factor = 1;
		lores_set(0);
	} else {
		can_use_lores++;
		lores_reset();
	}

	init_hardware_for_drawing_frame ();

	if (thisframe_first_drawn_line < 0)
		thisframe_first_drawn_line = minfirstline;
	if (thisframe_first_drawn_line > thisframe_last_drawn_line)
		thisframe_last_drawn_line = thisframe_first_drawn_line;

	maxline = ((maxvpos_display + 1) << linedbl) + 2;
#ifdef SMART_UPDATE
	for (i = 0; i < maxline; i++) {
		int ls = linestate[i];
		switch (ls) {
		case LINE_DONE_AS_PREVIOUS:
			linestate[i] = LINE_REMEMBERED_AS_PREVIOUS;
			break;
		case LINE_REMEMBERED_AS_BLACK:
			break;
		default:
			linestate[i] = LINE_UNDECIDED;
			break;
		}
	}
#else
	memset (linestate, LINE_UNDECIDED, maxline);
#endif
	last_drawn_line = 0;
	first_drawn_line = 32767;

	first_block_line = last_block_line = NO_BLOCK;
	if (frame_redraw_necessary)
		frame_redraw_necessary--;

	center_image ();

	thisframe_first_drawn_line = -1;
	thisframe_last_drawn_line = -1;

	drawing_color_matches = -1;
}

static int lightpen_y1, lightpen_y2;
static int statusbar_y1, statusbar_y2;

void putpixel (uae_u8 *buf, int bpp, int x, xcolnr c8, int opaq)
{
	if (x <= 0)
		return;

	switch (bpp) {
	case 1:
		buf[x] = (uae_u8)c8;
		break;
	case 2:
		{
			uae_u16 *p = (uae_u16*)buf + x;
			*p = (uae_u16)c8;
			break;
		}
	case 3:
		/* no 24 bit yet */
		break;
	case 4:
		{
			int i;
			if (1 || opaq || currprefs.gf[0].gfx_filter == 0) {
				uae_u32 *p = (uae_u32*)buf + x;
				*p = c8;
			} else {
				for (i = 0; i < 4; i++) {
					int v1 = buf[i + bpp * x];
					int v2 = (c8 >> (i * 8)) & 255;
					v1 = (v1 * 2 + v2 * 3) / 5;
					if (v1 > 255)
						v1 = 255;
					buf[i + bpp * x] = v1;
				}
			}
			break;
		}
	}
}

static uae_u8 *status_line_ptr(int line)
{
	int y;

	y = line - (gfxvidinfo.drawbuffer.outheight - TD_TOTAL_HEIGHT);
	xlinebuffer = gfxvidinfo.drawbuffer.linemem;
	if (xlinebuffer == 0)
		xlinebuffer = row_map[line];
	xlinebuffer_genlock = row_map_genlock[line];
	return xlinebuffer;
}

static void draw_status_line (int line, int statusy)
{
	uae_u8 *buf = status_line_ptr(line);
	if (!buf)
		return;
	if (statusy < 0)
		statusline_render(buf, gfxvidinfo.drawbuffer.pixbytes, gfxvidinfo.drawbuffer.rowbytes, gfxvidinfo.drawbuffer.outwidth, TD_TOTAL_HEIGHT, xredcolors, xgreencolors, xbluecolors, NULL);
	else
		draw_status_line_single(buf, gfxvidinfo.drawbuffer.pixbytes, statusy, gfxvidinfo.drawbuffer.outwidth, xredcolors, xgreencolors, xbluecolors, NULL);
}

static void draw_debug_status_line (int line)
{
	xlinebuffer = gfxvidinfo.drawbuffer.linemem;
	if (xlinebuffer == 0)
		xlinebuffer = row_map[line];
	xlinebuffer_genlock = row_map_genlock[line];
	debug_draw_cycles(xlinebuffer, gfxvidinfo.drawbuffer.pixbytes, line, gfxvidinfo.drawbuffer.outwidth, gfxvidinfo.drawbuffer.outheight, xredcolors, xgreencolors, xbluecolors);
}

#define LIGHTPEN_HEIGHT 12
#define LIGHTPEN_WIDTH 17

static const char *lightpen_cursor = {
	"------.....------"
	"------.xxx.------"
	"------.xxx.------"
	"------.xxx.------"
	".......xxx......."
	".xxxxxxxxxxxxxxx."
	".xxxxxxxxxxxxxxx."
	".......xxx......."
	"------.xxx.------"
	"------.xxx.------"
	"------.xxx.------"
	"------.....------"
};

static void draw_lightpen_cursor (int x, int y, int line, int onscreen)
{
	int i;
	const char *p;
	int color1 = onscreen ? 0xff0 : 0xf00;
	int color2 = 0x000;

	xlinebuffer = gfxvidinfo.drawbuffer.linemem;
	if (xlinebuffer == 0)
		xlinebuffer = row_map[line];
	xlinebuffer_genlock = row_map_genlock[line];

	p = lightpen_cursor + y * LIGHTPEN_WIDTH;
	for (i = 0; i < LIGHTPEN_WIDTH; i++) {
		int xx = x + i - LIGHTPEN_WIDTH / 2;
		if (*p != '-' && xx >= 0 && xx < gfxvidinfo.drawbuffer.outwidth)
			putpixel (xlinebuffer, gfxvidinfo.drawbuffer.pixbytes, xx, *p == 'x' ? xcolors[color1] : xcolors[color2], 1);
		p++;
	}
}

static void lightpen_update (struct vidbuffer *vb)
{
	int i;

	if (lightpen_x < LIGHTPEN_WIDTH + 1)
		lightpen_x = LIGHTPEN_WIDTH + 1;
	if (lightpen_x >= gfxvidinfo.drawbuffer.inwidth - LIGHTPEN_WIDTH - 1)
		lightpen_x = gfxvidinfo.drawbuffer.inwidth - LIGHTPEN_WIDTH - 2;
	if (lightpen_y < LIGHTPEN_HEIGHT + 1)
		lightpen_y = LIGHTPEN_HEIGHT + 1;
	if (lightpen_y >= gfxvidinfo.drawbuffer.inheight - LIGHTPEN_HEIGHT - 1)
		lightpen_y = gfxvidinfo.drawbuffer.inheight - LIGHTPEN_HEIGHT - 2;
	if (lightpen_y >= max_ypos_thisframe - LIGHTPEN_HEIGHT - 1)
		lightpen_y = max_ypos_thisframe - LIGHTPEN_HEIGHT - 2;

	lightpen_cx = (((lightpen_x + visible_left_border) >> lores_shift) >> 1) + DISPLAY_LEFT_SHIFT - DIW_DDF_OFFSET;

	lightpen_cy = lightpen_y;
	lightpen_cy >>= linedbl;
	lightpen_cy += minfirstline;

	if (lightpen_cx < 0x18)
		lightpen_cx = 0x18;
	if (lightpen_cx >= maxhpos)
		lightpen_cx -= maxhpos;
	if (lightpen_cy < minfirstline)
		lightpen_cy = minfirstline;
	if (lightpen_cy >= maxvpos)
		lightpen_cy = maxvpos - 1;

	for (i = 0; i < LIGHTPEN_HEIGHT; i++) {
		int line = lightpen_y + i - LIGHTPEN_HEIGHT / 2;
		if (line >= 0 || line < max_ypos_thisframe) {
			if (lightpen_active > 0)
				draw_lightpen_cursor (lightpen_x, i, line, lightpen_cx > 0);
			flush_line (vb, line);
		}
	}
	lightpen_y1 = lightpen_y - LIGHTPEN_HEIGHT / 2 - 1 + min_ypos_for_screen;
	lightpen_y2 = lightpen_y1 + LIGHTPEN_HEIGHT + 2;

	if (lightpen_active < 0)
		lightpen_active = 0;
}

struct vidbuffer *xvbin, *xvbout;

#define LARGEST_LINE_DEBUG 0

static void draw_frame2 (struct vidbuffer *vbin, struct vidbuffer *vbout)
{
	int i;

	xvbin = vbin;
	xvbout = vbout;

#if LARGEST_LINE_DEBUG
	int largest = 0;
#endif
	for (i = 0; i < max_ypos_thisframe; i++) {
		int i1 = i + min_ypos_for_screen;
		int line = i + thisframe_y_adjust_real;
		int whereline = amiga2aspect_line_map[i1];
		int wherenext = amiga2aspect_line_map[i1 + 1];

		if (whereline >= vbin->inheight)
			break;
		if (whereline < 0)
			continue;

#if LARGEST_LINE_DEBUG
		if (largest < whereline)
			largest = whereline;
#endif

		hposblank = 0;
		pfield_draw_line(vbout, line, whereline, wherenext);
	}

#if LARGEST_LINE_DEBUG
	write_log (_T("%d\n"), largest);
#endif
}

bool draw_frame (struct vidbuffer *vb)
{
	uae_u8 oldstate[LINESTATE_SIZE];
	struct vidbuffer oldvb;

	memcpy (&oldvb, &gfxvidinfo.drawbuffer, sizeof (struct vidbuffer));
	memcpy (&gfxvidinfo.drawbuffer, vb, sizeof (struct vidbuffer));
	clearbuffer (vb);
	init_row_map ();
	memcpy (oldstate, linestate, LINESTATE_SIZE);
	for (int i = 0; i < LINESTATE_SIZE; i++) {
		uae_u8 v = linestate[i];
		if (v == LINE_REMEMBERED_AS_PREVIOUS) {
			linestate[i - 1] = LINE_DECIDED_DOUBLE;
			v = LINE_AS_PREVIOUS;
		} else if (v == LINE_DONE_AS_PREVIOUS) {
			linestate[i - 1] = LINE_DECIDED_DOUBLE;
			v = LINE_AS_PREVIOUS;
		} else if (v == LINE_REMEMBERED_AS_BLACK) {
			v = LINE_BLACK;
		} else if (v == LINE_DONE) {
			v = LINE_DECIDED;
		}
//		if (i < maxvpos)
//			write_log (_T("%d: %d -> %d\n"), i, linestate[i], v);
		linestate[i] = v;
	}
	last_drawn_line = 0;
	first_drawn_line = 32767;
	drawing_color_matches = -1;
	draw_frame2 (vb, NULL);
	last_drawn_line = 0;
	first_drawn_line = 32767;
	drawing_color_matches = -1;
	memcpy (linestate, oldstate, LINESTATE_SIZE);
	memcpy (&gfxvidinfo.drawbuffer, &oldvb, sizeof (struct vidbuffer));
	init_row_map ();
	return true;
}

static void setnativeposition(struct vidbuffer *vb)
{
	vb->inwidth = gfxvidinfo.drawbuffer.inwidth;
	vb->inheight = gfxvidinfo.drawbuffer.inheight;
	vb->inwidth2 = gfxvidinfo.drawbuffer.inwidth2;
	vb->inheight2 = gfxvidinfo.drawbuffer.inheight2;
	vb->outwidth = gfxvidinfo.drawbuffer.outwidth;
	vb->outheight = gfxvidinfo.drawbuffer.outheight;
}

static void setspecialmonitorpos(struct vidbuffer *vb)
{
	vb->extrawidth = gfxvidinfo.drawbuffer.extrawidth;
	vb->xoffset = gfxvidinfo.drawbuffer.xoffset;
	vb->yoffset = gfxvidinfo.drawbuffer.yoffset;
	vb->inxoffset = gfxvidinfo.drawbuffer.inxoffset;
	vb->inyoffset = gfxvidinfo.drawbuffer.inyoffset;
}

static void finish_drawing_frame (void)
{
	int i;
	bool didflush = false;
	struct vidbuffer *vb = &gfxvidinfo.drawbuffer;

	gfxvidinfo.outbuffer = vb;

	if (! lockscr (vb, false)) {
		notice_screen_contents_lost ();
		return;
	}

#ifndef SMART_UPDATE
	/* @@@ This isn't exactly right yet. FIXME */
	if (!interlace_seen)
		do_flush_screen (first_drawn_line, last_drawn_line);
	else
		unlockscr ();
	return;
#endif

	draw_frame2 (vb, vb);

	if (currprefs.leds_on_screen && ((currprefs.leds_on_screen & STATUSLINE_CHIPSET) && !(currprefs.leds_on_screen & STATUSLINE_TARGET))) {
		int slx, sly;
		statusline_getpos(&slx, &sly, vb->outwidth, vb->outheight);
		statusbar_y1 = sly + min_ypos_for_screen - 1;
		statusbar_y2 = statusbar_y1 + TD_TOTAL_HEIGHT + 1;
		draw_status_line(sly, -1);
		for (i = 0; i < TD_TOTAL_HEIGHT; i++) {
			int line = sly + i;
			draw_status_line (line, i);
			do_flush_line (vb, line);
		}
	}
	if (debug_dma > 1) {
		for (i = 0; i < vb->outheight; i++) {
			int line = i;
			draw_debug_status_line (line);
			do_flush_line (vb, line);
		}
	}

	if (lightpen_active)
		lightpen_update (vb);

	if (currprefs.monitoremu && gfxvidinfo.tempbuffer.bufmem_allocated) {
		setspecialmonitorpos(&gfxvidinfo.tempbuffer);
		if (init_genlock_data != specialmonitor_need_genlock()) {
			init_genlock_data = specialmonitor_need_genlock();
			init_row_map();
		}
		if (emulate_specialmonitors (vb, &gfxvidinfo.tempbuffer)) {
			vb = gfxvidinfo.outbuffer = &gfxvidinfo.tempbuffer;
			if (vb->nativepositioning)
				setnativeposition(vb);
			gfxvidinfo.drawbuffer.tempbufferinuse = true;
			need_genlock_data = specialmonitor_need_genlock();
			if (!specialmonitoron) {
				compute_framesync();
			}
			specialmonitoron = true;
			pfield_set_linetoscr();
			do_flush_screen (vb, 0, vb->outheight);
			didflush = true;
		} else {
			pfield_set_linetoscr();
			need_genlock_data = false;
			if (specialmonitoron || gfxvidinfo.drawbuffer.tempbufferinuse) {
				gfxvidinfo.drawbuffer.tempbufferinuse = false;
				specialmonitoron = false;
				compute_framesync();
			}
		}
	}

	if (currprefs.genlock_image && !currprefs.monitoremu && gfxvidinfo.tempbuffer.bufmem_allocated && currprefs.genlock) {
		pfield_set_linetoscr();
		setspecialmonitorpos(&gfxvidinfo.tempbuffer);
		if (init_genlock_data != specialmonitor_need_genlock()) {
			need_genlock_data = init_genlock_data = specialmonitor_need_genlock();
			init_row_map();
		}
		emulate_genlock(vb, &gfxvidinfo.tempbuffer);
		vb = gfxvidinfo.outbuffer = &gfxvidinfo.tempbuffer;
		if (vb->nativepositioning)
			setnativeposition(vb);
		gfxvidinfo.drawbuffer.tempbufferinuse = true;
		do_flush_screen(vb, 0, vb->outheight);
		didflush = true;
	}

	if (!currprefs.monitoremu && gfxvidinfo.tempbuffer.bufmem_allocated && currprefs.cs_cd32fmv) {
		if (cd32_fmv_active) {
			cd32_fmv_genlock(vb, &gfxvidinfo.tempbuffer);
			vb = gfxvidinfo.outbuffer = &gfxvidinfo.tempbuffer;
			setnativeposition(vb);
			gfxvidinfo.drawbuffer.tempbufferinuse = true;
			do_flush_screen(vb, 0, vb->outheight);
			didflush = true;
		} else {
			gfxvidinfo.drawbuffer.tempbufferinuse = false;
		}
	}

	if (!didflush)
		do_flush_screen (vb, first_drawn_line, last_drawn_line);
}

void hardware_line_completed (int lineno)
{
#ifndef SMART_UPDATE
	{
		int i, where;
		/* l is the line that has been finished for drawing. */
		i = lineno - thisframe_y_adjust_real;
		if (i >= 0 && i < max_ypos_thisframe) {
			where = amiga2aspect_line_map[i+min_ypos_for_screen];
			if (where < gfxvidinfo.drawbuffer.outheight && where >= 0)
				pfield_draw_line (lineno, where, amiga2aspect_line_map[i+min_ypos_for_screen+1]);
		}
	}
#endif
}

static void check_picasso (void)
{
#ifdef PICASSO96
	if (picasso_on && picasso_redraw_necessary)
		picasso_refresh ();
	picasso_redraw_necessary = 0;

	if (picasso_requested_on == picasso_on)
		return;

	picasso_on = picasso_requested_on;

	if (!picasso_on)
		clear_inhibit_frame (IHF_PICASSO);
	else
		set_inhibit_frame (IHF_PICASSO);

	gfx_set_picasso_state (picasso_on);
	picasso_enablescreen (picasso_requested_on);

	notice_screen_contents_lost ();
	notice_new_xcolors ();
	count_frame ();
#endif
}

void redraw_frame (void)
{
	last_drawn_line = 0;
	first_drawn_line = 32767;
	finish_drawing_frame ();
	flush_screen (gfxvidinfo.inbuffer, 0, 0);
}

bool vsync_handle_check (void)
{
	int changed = check_prefs_changed_gfx ();
	if (changed > 0) {
		reset_drawing ();
		init_row_map ();
		init_aspect_maps ();
		notice_screen_contents_lost ();
		notice_new_xcolors ();
	} else if (changed < 0) {
		reset_drawing ();
		init_row_map ();
		init_aspect_maps ();
		notice_screen_contents_lost ();
		notice_new_xcolors ();
	}
	check_prefs_changed_cd ();
	check_prefs_changed_audio ();
	check_prefs_changed_custom ();
	check_prefs_changed_cpu ();
	check_picasso ();
	return changed != 0;
}

void vsync_handle_redraw (int long_field, int lof_changed, uae_u16 bplcon0p, uae_u16 bplcon3p)
{
	last_redraw_point++;
	if (lof_changed || interlace_seen <= 0 || (currprefs.gfx_iscanlines && interlace_seen > 0) || last_redraw_point >= 2 || long_field || doublescan < 0) {
		last_redraw_point = 0;

		if (framecnt == 0)
			finish_drawing_frame ();
#if 0
		if (interlace_seen > 0) {
			interlace_seen = -1;
		} else if (interlace_seen == -1) {
			interlace_seen = 0;
			if (currprefs.gfx_scandoubler && currprefs.gfx_vresolution)
				notice_screen_contents_lost ();
		}
#endif

		if (quit_program < 0) {
#ifdef SAVESTATE
			if (!savestate_state) {
				if (currprefs.quitstatefile[0]) {
					savestate_initsave (currprefs.quitstatefile, 1, 1, true); 
					save_state (currprefs.quitstatefile, _T(""));
				}
			}
#endif
			quit_program = -quit_program;
			set_inhibit_frame (IHF_QUIT_PROGRAM);
			set_special(SPCFLAG_BRK | SPCFLAG_MODE_CHANGE);
			return;
		}

		count_frame ();

		if (framecnt == 0)
			init_drawing_frame ();
		else if (currprefs.cpu_cycle_exact)
			init_hardware_for_drawing_frame ();
	} else {
		if (isvsync_chipset ())
			flush_screen (gfxvidinfo.inbuffer, 0, 0); /* vsync mode */
	}

	gui_flicker_led (-1, 0, 0);
#ifdef AVIOUTPUT
	if (!picasso_on)
		frame_drawn ();
#endif
}

void hsync_record_line_state (int lineno, enum nln_how how, int changed)
{
	uae_u8 *state;

	if (framecnt != 0)
		return;

	state = linestate + lineno;
	changed += frame_redraw_necessary + ((
		(lineno >= lightpen_y1 && lineno < lightpen_y2) ||
		(lineno >= statusbar_y1 && lineno < statusbar_y2))
		? 1 : 0);

	switch (how) {
	case nln_normal:
		*state = changed ? LINE_DECIDED : LINE_DONE;
		break;
	case nln_doubled:
		*state = changed ? LINE_DECIDED_DOUBLE : LINE_DONE;
		changed += state[1] != LINE_REMEMBERED_AS_PREVIOUS;
		state[1] = changed ? LINE_AS_PREVIOUS : LINE_DONE_AS_PREVIOUS;
		break;
	case nln_nblack:
		*state = changed ? LINE_DECIDED : LINE_DONE;
		if (state[1] != LINE_REMEMBERED_AS_BLACK)
			state[1] = LINE_BLACK;
		break;
	case nln_lower:
		if (state[-1] == LINE_UNDECIDED)
			state[-1] = LINE_DECIDED; //LINE_BLACK;
		*state = changed ? LINE_DECIDED : LINE_DONE;
		break;
	case nln_upper:
		*state = changed ? LINE_DECIDED : LINE_DONE;
		if (state[1] == LINE_UNDECIDED
			|| state[1] == LINE_REMEMBERED_AS_PREVIOUS
			|| state[1] == LINE_AS_PREVIOUS)
			state[1] = LINE_DECIDED; //LINE_BLACK;
		break;
	case nln_lower_black_always:
		state[1] = LINE_BLACK;
		*state = LINE_DECIDED;
//		if (lineno == (maxvpos + lof_store) * 2 - 1)
//			*state = LINE_BLACK;
		break;
	case nln_lower_black:
		changed += state[0] != LINE_DONE;
		state[1] = LINE_DONE;
		*state = changed ? LINE_DECIDED : LINE_DONE;
//		if (lineno == (maxvpos + lof_store) * 2 - 1)
//			*state = LINE_BLACK;
		break;
	case nln_upper_black_always:
		*state = LINE_DECIDED;
		state[-1] = LINE_BLACK;
		if (!interlace_seen && lineno == (maxvpos + lof_store) * 2 - 2)
			state[1] = LINE_BLACK;
		break;
	case nln_upper_black:
		changed += state[0] != LINE_DONE;
		*state = changed ? LINE_DECIDED : LINE_DONE;
		state[-1] = LINE_DONE;
		if (!interlace_seen && lineno == (maxvpos + lof_store) * 2 - 2)
			state[1] = LINE_DONE;
		break;
	}
}

static void dummy_flush_line (struct vidbuf_description *gfxinfo, struct vidbuffer *vb, int line_no)
{
}

static void dummy_flush_block (struct vidbuf_description *gfxinfo, struct vidbuffer *vb, int first_line, int last_line)
{
}

static void dummy_flush_screen (struct vidbuf_description *gfxinfo, struct vidbuffer *vb, int first_line, int last_line)
{
}

static void dummy_flush_clear_screen (struct vidbuf_description *gfxinfo, struct vidbuffer *vb)
{
}

static int  dummy_lock (struct vidbuf_description *gfxinfo, struct vidbuffer *vb)
{
	return 1;
}

static void dummy_unlock (struct vidbuf_description *gfxinfo, struct vidbuffer *vb)
{
}

static void gfxbuffer_reset (void)
{
	gfxvidinfo.drawbuffer.flush_line         = dummy_flush_line;
	gfxvidinfo.drawbuffer.flush_block        = dummy_flush_block;
	gfxvidinfo.drawbuffer.flush_screen       = dummy_flush_screen;
	gfxvidinfo.drawbuffer.flush_clear_screen = dummy_flush_clear_screen;
	gfxvidinfo.drawbuffer.lockscr            = dummy_lock;
	gfxvidinfo.drawbuffer.unlockscr          = dummy_unlock;
}

void notice_resolution_seen (int res, bool lace)
{
	if (res > frame_res)
		frame_res = res;
	if (res > 0)
		can_use_lores = 0;
	if (!frame_res_lace && lace)
		frame_res_lace = lace;
}

bool notice_interlace_seen (bool lace)
{
	bool changed = false;
	// non-lace to lace switch (non-lace active at least one frame)?
	if (lace) {
		if (interlace_seen == 0) {
			changed = true;
			//write_log (_T("->lace PC=%x\n"), m68k_getpc ());
		}
		interlace_seen = currprefs.gfx_vresolution ? 1 : -1;
	} else {
		if (interlace_seen) {
			changed = true;
			//write_log (_T("->non-lace PC=%x\n"), m68k_getpc ());
		}
		interlace_seen = 0;
	}
	return changed;
}

void allocvidbuffer (struct vidbuffer *buf, int width, int height, int depth)
{
	memset (buf, 0, sizeof (struct vidbuffer));
	buf->pixbytes = (depth + 7) / 8;
	buf->width_allocated = (width + 7) & ~7;
	buf->height_allocated = height;

	buf->outwidth = buf->width_allocated;
	buf->outheight = buf->height_allocated;
	buf->inwidth = buf->width_allocated;
	buf->inheight = buf->height_allocated;

	int size = width * height * buf->pixbytes;
	buf->realbufmem = xcalloc (uae_u8, size);
	buf->bufmem_allocated = buf->bufmem = buf->realbufmem;
	buf->rowbytes = width * buf->pixbytes;
	buf->bufmemend = buf->realbufmem + size - buf->rowbytes;
	buf->bufmem_lockable = true;
}

void freevidbuffer (struct vidbuffer *buf)
{
	xfree (buf->realbufmem);
	memset (buf, 0, sizeof (struct vidbuffer));
}

void reset_drawing (void)
{
	unsigned int i;

	max_diwstop = 0;

	lores_reset ();

	for (i = 0; i < sizeof linestate / sizeof *linestate; i++) {
		linestate[i] = LINE_UNDECIDED;
	}

	init_aspect_maps ();

	init_row_map ();

	last_redraw_point = 0;

	memset (spixels, 0, sizeof spixels);
	memset (&spixstate, 0, sizeof spixstate);

	init_drawing_frame ();
	pfield_set_linetoscr();

	notice_screen_contents_lost ();
	frame_res_cnt = currprefs.gfx_autoresolution_delay;
	lightpen_y1 = lightpen_y2 = -1;

	reset_custom_limits ();

	clearbuffer (&gfxvidinfo.drawbuffer);
	clearbuffer (&gfxvidinfo.tempbuffer);

	center_reset = true;
	specialmonitoron = false;
}

void drawing_init (void)
{
	gen_pfield_tables ();

	uae_sem_init (&gui_sem, 0, 1);
#ifdef PICASSO96
	if (!isrestore ()) {
		picasso_on = 0;
		picasso_requested_on = 0;
		gfx_set_picasso_state (0);
	}
#endif
	xlinebuffer = gfxvidinfo.drawbuffer.bufmem;
	xlinebuffer_genlock = NULL;

	inhibit_frame = 0;

	gfxbuffer_reset ();
	reset_drawing ();
}

int isvsync_chipset (void)
{
	if (picasso_on || !currprefs.gfx_apmode[0].gfx_vsync || (currprefs.gfx_apmode[0].gfx_vsync == 0 && !currprefs.gfx_apmode[0].gfx_fullscreen))
		return 0;
	if (currprefs.gfx_apmode[0].gfx_vsyncmode == 0)
		return 1;
	if (currprefs.m68k_speed >= 0)
		return -1;
	return currprefs.cachesize ? -3 : -2;
}

int isvsync_rtg (void)
{
	if (!picasso_on || !currprefs.gfx_apmode[1].gfx_vsync || (currprefs.gfx_apmode[1].gfx_vsync == 0 && !currprefs.gfx_apmode[1].gfx_fullscreen))
		return 0;
	if (currprefs.gfx_apmode[1].gfx_vsyncmode == 0)
		return 1;
	if (currprefs.m68k_speed >= 0)
		return -1;
	return currprefs.cachesize ? -3 : -2;
}

int isvsync (void)
{
	if (picasso_on)
		return isvsync_rtg ();
	else
		return isvsync_chipset ();
}