X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fdraw2.c;fp=pico%2Fdraw2.c;h=b2e6a7106bc005ac338555521d768f9250144059;hb=1cfc5cc4ce06642b9bc45ca3b9d32793718e9455;hp=0000000000000000000000000000000000000000;hpb=d158df697da66bcda57307e35fc77929cfa5053c;p=picodrive.git

diff --git a/pico/draw2.c b/pico/draw2.c
new file mode 100644
index 0000000..b2e6a71
--- /dev/null
+++ b/pico/draw2.c
@@ -0,0 +1,623 @@
+// This is part of Pico Library
+
+// (c) Copyright 2007, Grazvydas "notaz" Ignotas
+// Free for non-commercial use.
+
+// For commercial use, separate licencing terms must be obtained.
+
+
+// this is a frame-based renderer, alternative to Dave's line based which is in Draw.c
+
+
+#include "pico_int.h"
+
+// port_config.h include must define these 2 defines:
+// #define START_ROW  1 // which row of tiles to start rendering at?
+// #define END_ROW   27 // ..end
+// one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.
+
+#define TILE_ROWS END_ROW-START_ROW
+
+#define USE_CACHE
+
+// note: this is not implemented in ARM asm
+#if defined(DRAW2_OVERRIDE_LINE_WIDTH)
+#define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH
+#else
+#define LINE_WIDTH 328
+#endif
+
+static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers
+static int HighCache2B[41*(TILE_ROWS+1)+1+1];
+
+unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)
+void (*PicoPrepareCram)()=0;            // prepares PicoCramHigh for renderer to use
+
+
+// stuff available in asm:
+#ifdef _ASM_DRAW_C
+void BackFillFull(int reg7);
+void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);
+void DrawTilesFromCacheF(int *hc);
+void DrawWindowFull(int start, int end, int prio);
+void DrawSpriteFull(unsigned int *sprite);
+#else
+
+
+static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)
+{
+	unsigned int pack=0; unsigned int t=0, blank = 1;
+	int i;
+
+	for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {
+		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
+		if(!pack) continue;
+
+		t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);
+		t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);
+		t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);
+		t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);
+		t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);
+		t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);
+		t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);
+		t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);
+		blank = 0;
+	}
+
+	return blank; // Tile blank?
+}
+
+static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)
+{
+	unsigned int pack=0; unsigned int t=0, blank = 1;
+	int i;
+
+	for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {
+		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
+		if(!pack) continue;
+
+		t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);
+		t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);
+		t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);
+		t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);
+		t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);
+		t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);
+		t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);
+		t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);
+		blank = 0;
+	}
+	return blank; // Tile blank?
+}
+
+static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)
+{
+	unsigned int pack=0; unsigned int t=0, blank = 1;
+	int i;
+
+	addr+=14;
+	for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {
+		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
+		if(!pack) continue;
+
+		t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);
+		t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);
+		t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);
+		t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);
+		t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);
+		t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);
+		t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);
+		t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);
+		blank = 0;
+	}
+
+	return blank; // Tile blank?
+}
+
+static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)
+{
+	unsigned int pack=0; unsigned int t=0, blank = 1;
+	int i;
+
+	addr+=14;
+	for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {
+		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
+		if(!pack) continue;
+
+		t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);
+		t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);
+		t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);
+		t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);
+		t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);
+		t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);
+		t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);
+		t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);
+		blank = 0;
+	}
+	return blank; // Tile blank?
+}
+
+
+// start: (tile_start<<16)|row_start, end: [same]
+static void DrawWindowFull(int start, int end, int prio)
+{
+	struct PicoVideo *pvid=&Pico.video;
+	int nametab, nametab_step, trow, tilex, blank=-1, code;
+	unsigned char *scrpos = PicoDraw2FB;
+	int tile_start, tile_end; // in cells
+
+	// parse ranges
+	tile_start = start>>16;
+	tile_end = end>>16;
+	start = start<<16>>16;
+	end = end<<16>>16;
+
+	// Find name table line:
+	if (pvid->reg[12]&1)
+	{
+		nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
+		nametab_step = 1<<6;
+	}
+	else
+	{
+		nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
+		nametab_step = 1<<5;
+	}
+	nametab += nametab_step*start;
+
+	// check priority
+	code=Pico.vram[nametab+tile_start];
+	if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority
+
+	scrpos+=8*LINE_WIDTH+8;
+	scrpos+=8*LINE_WIDTH*(start-START_ROW);
+
+	// do a window until we reach planestart row
+	for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row
+		for (tilex=tile_start; tilex<tile_end; tilex++)
+		{
+			int code,addr,zero=0;
+//			unsigned short *pal=NULL;
+			unsigned char pal;
+
+			code=Pico.vram[nametab+tilex];
+			if (code==blank) continue;
+
+			// Get tile address/2:
+			addr=(code&0x7ff)<<4;
+
+//			pal=PicoCramHigh+((code>>9)&0x30);
+			pal=(unsigned char)((code>>9)&0x30);
+
+			switch((code>>11)&3) {
+				case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;
+				case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;
+				case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;
+				case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;
+			}
+			if(zero) blank=code; // We know this tile is blank now
+		}
+
+		scrpos += LINE_WIDTH*8;
+	}
+}
+
+
+static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)
+{
+	struct PicoVideo *pvid=&Pico.video;
+	static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps
+	int width, height, ymask, htab;
+	int nametab, hscroll=0, vscroll, cells;
+	unsigned char *scrpos;
+	int blank=-1, xmask, nametab_row, trow;
+
+	// parse ranges
+	cells = (planeend>>16)-(planestart>>16);
+	planestart = planestart<<16>>16;
+	planeend = planeend<<16>>16;
+
+	// Work out the Tiles to draw
+
+	htab=pvid->reg[13]<<9; // Horizontal scroll table address
+//	if ( pvid->reg[11]&2)     htab+=Scanline<<1; // Offset by line
+//	if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
+	htab+=plane; // A or B
+
+	if(!(pvid->reg[11]&3)) { // full screen scroll
+		// Get horizontal scroll value
+		hscroll=Pico.vram[htab&0x7fff];
+		htab = 0; // this marks that we don't have to update scroll value
+	}
+
+	// Work out the name table size: 32 64 or 128 tiles (0-3)
+	width=pvid->reg[16];
+	height=(width>>4)&3; width&=3;
+
+	xmask=(1<<shift[width ])-1; // X Mask in tiles
+	ymask=(height<<5)|0x1f;     // Y Mask in tiles
+	if(width == 1)   ymask&=0x3f;
+	else if(width>1) ymask =0x1f;
+
+	// Find name table:
+	if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A
+	else          nametab=(pvid->reg[4]&0x07)<<12; // B
+
+	scrpos = PicoDraw2FB;
+	scrpos+=8*LINE_WIDTH*(planestart-START_ROW);
+
+	// Get vertical scroll value:
+	vscroll=Pico.vsram[plane]&0x1ff;
+	scrpos+=(8-(vscroll&7))*LINE_WIDTH;
+	if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row
+
+	*hcache++ = 8-(vscroll&7); // push y-offset to tilecache
+
+
+	for(trow = planestart; trow < planeend; trow++) { // current tile row
+		int cellc=cells,tilex,dx;
+
+		// Find the tile row in the name table
+		//ts.line=(vscroll+Scanline)&ymask;
+		//ts.nametab+=(ts.line>>3)<<shift[width];
+		nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row
+
+		// update hscroll if needed
+		if(htab) {
+			int htaddr=htab+(trow<<4);
+			if(trow) htaddr-=(vscroll&7)<<1;
+			hscroll=Pico.vram[htaddr&0x7fff];
+		}
+
+		// Draw tiles across screen:
+		tilex=(-hscroll)>>3;
+		dx=((hscroll-1)&7)+1;
+		if(dx != 8) cellc++; // have hscroll, do more cells
+
+		for (; cellc; dx+=8,tilex++,cellc--)
+		{
+			int code=0,addr=0,zero=0;
+//			unsigned short *pal=NULL;
+			unsigned char pal;
+
+			code=Pico.vram[nametab_row+(tilex&xmask)];
+			if (code==blank) continue;
+
+			if (code>>15) { // high priority tile
+				*hcache++ = code|(dx<<16)|(trow<<27); // cache it
+				continue;
+			}
+
+			// Get tile address/2:
+			addr=(code&0x7ff)<<4;
+
+//			pal=PicoCramHigh+((code>>9)&0x30);
+			pal=(unsigned char)((code>>9)&0x30);
+
+			switch((code>>11)&3) {
+				case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;
+				case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;
+				case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;
+				case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;
+			}
+			if(zero) blank=code; // We know this tile is blank now
+		}
+
+		scrpos += LINE_WIDTH*8;
+	}
+
+	*hcache = 0; // terminate cache
+}
+
+
+static void DrawTilesFromCacheF(int *hc)
+{
+	int code, addr, zero = 0;
+	unsigned int prevy=0xFFFFFFFF;
+//	unsigned short *pal;
+	unsigned char pal;
+	short blank=-1; // The tile we know is blank
+	unsigned char *scrpos = PicoDraw2FB, *pd = 0;
+
+	// *hcache++ = code|(dx<<16)|(trow<<27); // cache it
+	scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;
+
+	while((code=*hc++)) {
+		if((short)code == blank) continue;
+
+		// y pos
+		if(((unsigned)code>>27) != prevy) {
+			prevy = (unsigned)code>>27;
+			pd = scrpos + prevy*LINE_WIDTH*8;
+		}
+
+		// Get tile address/2:
+		addr=(code&0x7ff)<<4;
+//		pal=PicoCramHigh+((code>>9)&0x30);
+		pal=(unsigned char)((code>>9)&0x30);
+
+		switch((code>>11)&3) {
+			case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;
+			case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;
+			case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;
+			case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;
+		}
+
+		if(zero) blank=(short)code;
+	}
+}
+
+
+// sx and sy are coords of virtual screen with 8pix borders on top and on left
+static void DrawSpriteFull(unsigned int *sprite)
+{
+	int width=0,height=0;
+//	unsigned short *pal=NULL;
+	unsigned char pal;
+	int tile,code,tdeltax,tdeltay;
+	unsigned char *scrpos;
+	int sx, sy;
+
+	sy=sprite[0];
+	height=sy>>24;
+	sy=(sy&0x1ff)-0x78; // Y
+	width=(height>>2)&3; height&=3;
+	width++; height++; // Width and height in tiles
+
+	code=sprite[1];
+	sx=((code>>16)&0x1ff)-0x78; // X
+
+	tile=code&0x7ff; // Tile number
+	tdeltax=height; // Delta to increase tile by going right
+	tdeltay=1;      // Delta to increase tile by going down
+	if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X
+	if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y
+
+	//delta<<=4; // Delta of address
+//	pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer
+	pal=(unsigned char)((code>>9)&0x30);
+
+	// goto first vertically visible tile
+	while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }
+
+	scrpos = PicoDraw2FB;
+	scrpos+=(sy-START_ROW*8)*LINE_WIDTH;
+
+	for (; height > 0; height--, sy+=8, tile+=tdeltay)
+	{
+		int w = width, x=sx, t=tile;
+
+		if(sy >= END_ROW*8+8) return; // offscreen
+
+		for (; w; w--,x+=8,t+=tdeltax)
+		{
+			if(x<=0)   continue;
+			if(x>=328) break; // Offscreen
+
+			t&=0x7fff; // Clip tile address
+			switch((code>>11)&3) {
+				case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;
+				case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;
+				case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;
+				case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;
+			}
+		}
+
+		scrpos+=8*LINE_WIDTH;
+	}
+}
+#endif
+
+
+static void DrawAllSpritesFull(int prio, int maxwidth)
+{
+	struct PicoVideo *pvid=&Pico.video;
+	int table=0,maskrange=0;
+	int i,u,link=0;
+	unsigned int *sprites[80]; // Sprites
+	int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking
+
+	table=pvid->reg[5]&0x7f;
+	if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
+	table<<=8; // Get sprite table address/2
+
+	for (i=u=0; u < 80; u++)
+	{
+		unsigned int *sprite=NULL;
+		int code, code2, sx, sy, height;
+
+		sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
+
+		// get sprite info
+		code = sprite[0];
+
+		// check if it is not hidden vertically
+		sy = (code&0x1ff)-0x80;
+		height = (((code>>24)&3)+1)<<3;
+		if(sy+height <= y_min || sy > y_max) goto nextsprite;
+
+		// masking sprite?
+		code2=sprite[1];
+		sx = (code2>>16)&0x1ff;
+		if(!sx) {
+			int to = sy+height; // sy ~ from
+			if(maskrange) {
+				// try to merge with previous range
+				if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);
+				else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);
+			}
+			// support only very simple masking (top and bottom of screen)
+			if(sy <= y_min && to+1 > y_min) y_min = to+1;
+			else if(to >= y_max && sy-1 < y_max) y_max = sy-1;
+			else maskrange=sy|(to<<16);
+
+			goto nextsprite;
+		}
+
+		// priority
+		if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority
+
+		// check if sprite is not hidden horizontally
+		sx -= 0x78; // Get X coordinate + 8
+		if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;
+
+		// sprite is good, save it's index
+		sprites[i++]=sprite;
+
+		nextsprite:
+		// Find next sprite
+		link=(code>>16)&0x7f;
+		if(!link) break; // End of sprites
+	}
+
+	// Go through sprites backwards:
+	for (i-- ;i>=0; i--)
+	{
+		DrawSpriteFull(sprites[i]);
+	}
+}
+
+#ifndef _ASM_DRAW_C
+static void BackFillFull(int reg7)
+{
+	unsigned int back;
+
+	// Start with a background color:
+//	back=PicoCramHigh[reg7&0x3f];
+	back=reg7&0x3f;
+	back|=back<<8;
+	back|=back<<16;
+
+	memset32((int *)PicoDraw2FB, back, LINE_WIDTH*(8+(END_ROW-START_ROW)*8)/4);
+}
+#endif
+
+static void DrawDisplayFull(void)
+{
+	struct PicoVideo *pvid=&Pico.video;
+	int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full
+	int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)
+	int winstart=START_ROW, winend=END_ROW;     // same for window
+	int maxw, maxcolc; // max width and col cells
+
+	if(pvid->reg[12]&1) {
+		maxw = 328; maxcolc = 40;
+	} else {
+		maxw = 264; maxcolc = 32;
+	}
+
+	// horizontal window?
+	if ((win=pvid->reg[0x12]))
+	{
+		hvwin=1; // hwindow shares display with plane A
+		edge=win&0x1f;
+		if(win == 0x80) {
+			// fullscreen window
+			hvwin=4;
+		} else if(win < 0x80) {
+			// window on the top
+			     if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region
+			else if(edge >= END_ROW)   hvwin=4;
+			else planestart = winend = edge;
+		} else if(win > 0x80) {
+			// window at the bottom
+			if(edge >= END_ROW) hvwin=0;
+			else planeend = winstart = edge;
+		}
+	}
+
+	// check for vertical window, but only if win is not fullscreen
+	if (hvwin != 4)
+	{
+		win=pvid->reg[0x11];
+		edge=win&0x1f;
+		if (win&0x80) {
+			if(!edge) hvwin=4;
+			else if(edge < (maxcolc>>1)) {
+				// window is on the right
+				hvwin|=2;
+				planeend|=edge<<17;
+				winstart|=edge<<17;
+				winend|=maxcolc<<16;
+			}
+		} else {
+			if(edge >= (maxcolc>>1)) hvwin=4;
+			else if(edge) {
+				// window is on the left
+				hvwin|=2;
+				winend|=edge<<17;
+				planestart|=edge<<17;
+				planeend|=maxcolc<<16;
+			}
+		}
+	}
+
+	if (hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }
+
+	HighCache2A[1] = HighCache2B[1] = 0;
+	if (PicoDrawMask & PDRAW_LAYERB_ON)
+		DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW);
+	if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)
+	{
+		case 4:
+		// fullscreen window
+		DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);
+		break;
+
+		case 3:
+		// we have plane A and both v and h windows
+		DrawLayerFull(0, HighCache2A, planestart, planeend);
+		DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h
+		DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0);    // v
+		break;
+
+		case 2:
+		case 1:
+		// both window and plane A visible, window is vertical XOR horizontal
+		DrawLayerFull(0, HighCache2A, planestart, planeend);
+		DrawWindowFull(winstart, winend, 0);
+		break;
+
+		default:
+		// fullscreen plane A
+		DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW);
+		break;
+	}
+	if (PicoDrawMask & PDRAW_SPRITES_LOW_ON)
+		DrawAllSpritesFull(0, maxw);
+
+	if (HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);
+	if (HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);
+	if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)
+	{
+		case 4:
+		// fullscreen window
+		DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);
+		break;
+
+		case 3:
+		// we have plane A and both v and h windows
+		DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h
+		DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1);    // v
+		break;
+
+		case 2:
+		case 1:
+		// both window and plane A visible, window is vertical XOR horizontal
+		DrawWindowFull(winstart, winend, 1);
+		break;
+	}
+	if (PicoDrawMask & PDRAW_SPRITES_HI_ON)
+		DrawAllSpritesFull(1, maxw);
+}
+
+
+PICO_INTERNAL void PicoFrameFull()
+{
+	// prepare cram?
+	if (PicoPrepareCram) PicoPrepareCram();
+
+	// Draw screen:
+	BackFillFull(Pico.video.reg[7]);
+	if (Pico.video.reg[1]&0x40) DrawDisplayFull();
+}
+