[picodrive.git] / pico / draw2.c

// This is part of Pico Library\r
\r
// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
// Free for non-commercial use.\r
\r
// For commercial use, separate licencing terms must be obtained.\r
\r
\r
// this is a frame-based renderer, alternative to Dave's line based which is in Draw.c\r
\r
\r
#include "pico_int.h"\r
\r
// port_config.h include must define these 2 defines:\r
// #define START_ROW  1 // which row of tiles to start rendering at?\r
// #define END_ROW   27 // ..end\r
// one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.\r
\r
#define TILE_ROWS END_ROW-START_ROW\r
\r
#define USE_CACHE\r
\r
// note: this is not implemented in ARM asm\r
#if defined(DRAW2_OVERRIDE_LINE_WIDTH)\r
#define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH\r
#else\r
#define LINE_WIDTH 328\r
#endif\r
\r
static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r
static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r
\r
unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r
void (*PicoPrepareCram)()=0;            // prepares PicoCramHigh for renderer to use\r
\r
\r
// stuff available in asm:\r
#ifdef _ASM_DRAW_C\r
void BackFillFull(int reg7);\r
void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r
void DrawTilesFromCacheF(int *hc);\r
void DrawWindowFull(int start, int end, int prio);\r
void DrawSpriteFull(unsigned int *sprite);\r
#else\r
\r
\r
static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r
{\r
	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	int i;\r
\r
	for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
		if(!pack) continue;\r
\r
		t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
		t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
		t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
		t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);\r
		t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
		t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
		t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
		t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
		blank = 0;\r
	}\r
\r
	return blank; // Tile blank?\r
}\r
\r
static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r
{\r
	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	int i;\r
\r
	for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
		if(!pack) continue;\r
\r
		t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
		t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
		t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
		t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
		t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);\r
		t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
		t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
		t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
		blank = 0;\r
	}\r
	return blank; // Tile blank?\r
}\r
\r
static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r
{\r
	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	int i;\r
\r
	addr+=14;\r
	for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
		if(!pack) continue;\r
\r
		t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
		t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
		t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
		t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);\r
		t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
		t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
		t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
		t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
		blank = 0;\r
	}\r
\r
	return blank; // Tile blank?\r
}\r
\r
static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r
{\r
	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	int i;\r
\r
	addr+=14;\r
	for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
		pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
		if(!pack) continue;\r
\r
		t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
		t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
		t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
		t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
		t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);\r
		t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
		t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
		t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
		blank = 0;\r
	}\r
	return blank; // Tile blank?\r
}\r
\r
\r
// start: (tile_start<<16)|row_start, end: [same]\r
static void DrawWindowFull(int start, int end, int prio)\r
{\r
	struct PicoVideo *pvid=&Pico.video;\r
	int nametab, nametab_step, trow, tilex, blank=-1, code;\r
	unsigned char *scrpos = PicoDraw2FB;\r
	int tile_start, tile_end; // in cells\r
\r
	// parse ranges\r
	tile_start = start>>16;\r
	tile_end = end>>16;\r
	start = start<<16>>16;\r
	end = end<<16>>16;\r
\r
	// Find name table line:\r
	if (pvid->reg[12]&1)\r
	{\r
		nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
		nametab_step = 1<<6;\r
	}\r
	else\r
	{\r
		nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
		nametab_step = 1<<5;\r
	}\r
	nametab += nametab_step*start;\r
\r
	// check priority\r
	code=Pico.vram[nametab+tile_start];\r
	if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r
\r
	scrpos+=8*LINE_WIDTH+8;\r
	scrpos+=8*LINE_WIDTH*(start-START_ROW);\r
\r
	// do a window until we reach planestart row\r
	for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r
		for (tilex=tile_start; tilex<tile_end; tilex++)\r
		{\r
			int code,addr,zero=0;\r
//			unsigned short *pal=NULL;\r
			unsigned char pal;\r
\r
			code=Pico.vram[nametab+tilex];\r
			if (code==blank) continue;\r
\r
			// Get tile address/2:\r
			addr=(code&0x7ff)<<4;\r
\r
//			pal=PicoCramHigh+((code>>9)&0x30);\r
			pal=(unsigned char)((code>>9)&0x30);\r
\r
			switch((code>>11)&3) {\r
				case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r
				case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r
				case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r
				case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r
			}\r
			if(zero) blank=code; // We know this tile is blank now\r
		}\r
\r
		scrpos += LINE_WIDTH*8;\r
	}\r
}\r
\r
\r
static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r
{\r
	struct PicoVideo *pvid=&Pico.video;\r
	static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r
	int width, height, ymask, htab;\r
	int nametab, hscroll=0, vscroll, cells;\r
	unsigned char *scrpos;\r
	int blank=-1, xmask, nametab_row, trow;\r
\r
	// parse ranges\r
	cells = (planeend>>16)-(planestart>>16);\r
	planestart = planestart<<16>>16;\r
	planeend = planeend<<16>>16;\r
\r
	// Work out the Tiles to draw\r
\r
	htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
//	if ( pvid->reg[11]&2)     htab+=Scanline<<1; // Offset by line\r
//	if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
	htab+=plane; // A or B\r
\r
	if(!(pvid->reg[11]&3)) { // full screen scroll\r
		// Get horizontal scroll value\r
		hscroll=Pico.vram[htab&0x7fff];\r
		htab = 0; // this marks that we don't have to update scroll value\r
	}\r
\r
	// Work out the name table size: 32 64 or 128 tiles (0-3)\r
	width=pvid->reg[16];\r
	height=(width>>4)&3; width&=3;\r
\r
	xmask=(1<<shift[width ])-1; // X Mask in tiles\r
	ymask=(height<<5)|0x1f;     // Y Mask in tiles\r
	if(width == 1)   ymask&=0x3f;\r
	else if(width>1) ymask =0x1f;\r
\r
	// Find name table:\r
	if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r
	else          nametab=(pvid->reg[4]&0x07)<<12; // B\r
\r
	scrpos = PicoDraw2FB;\r
	scrpos+=8*LINE_WIDTH*(planestart-START_ROW);\r
\r
	// Get vertical scroll value:\r
	vscroll=Pico.vsram[plane]&0x1ff;\r
	scrpos+=(8-(vscroll&7))*LINE_WIDTH;\r
	if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r
\r
	*hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r
\r
\r
	for(trow = planestart; trow < planeend; trow++) { // current tile row\r
		int cellc=cells,tilex,dx;\r
\r
		// Find the tile row in the name table\r
		//ts.line=(vscroll+Scanline)&ymask;\r
		//ts.nametab+=(ts.line>>3)<<shift[width];\r
		nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r
\r
		// update hscroll if needed\r
		if(htab) {\r
			int htaddr=htab+(trow<<4);\r
			if(trow) htaddr-=(vscroll&7)<<1;\r
			hscroll=Pico.vram[htaddr&0x7fff];\r
		}\r
\r
		// Draw tiles across screen:\r
		tilex=(-hscroll)>>3;\r
		dx=((hscroll-1)&7)+1;\r
		if(dx != 8) cellc++; // have hscroll, do more cells\r
\r
		for (; cellc; dx+=8,tilex++,cellc--)\r
		{\r
			int code=0,addr=0,zero=0;\r
//			unsigned short *pal=NULL;\r
			unsigned char pal;\r
\r
			code=Pico.vram[nametab_row+(tilex&xmask)];\r
			if (code==blank) continue;\r
\r
			if (code>>15) { // high priority tile\r
				*hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
				continue;\r
			}\r
\r
			// Get tile address/2:\r
			addr=(code&0x7ff)<<4;\r
\r
//			pal=PicoCramHigh+((code>>9)&0x30);\r
			pal=(unsigned char)((code>>9)&0x30);\r
\r
			switch((code>>11)&3) {\r
				case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r
				case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r
				case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r
				case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r
			}\r
			if(zero) blank=code; // We know this tile is blank now\r
		}\r
\r
		scrpos += LINE_WIDTH*8;\r
	}\r
\r
	*hcache = 0; // terminate cache\r
}\r
\r
\r
static void DrawTilesFromCacheF(int *hc)\r
{\r
	int code, addr, zero = 0;\r
	unsigned int prevy=0xFFFFFFFF;\r
//	unsigned short *pal;\r
	unsigned char pal;\r
	short blank=-1; // The tile we know is blank\r
	unsigned char *scrpos = PicoDraw2FB, *pd = 0;\r
\r
	// *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
	scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;\r
\r
	while((code=*hc++)) {\r
		if((short)code == blank) continue;\r
\r
		// y pos\r
		if(((unsigned)code>>27) != prevy) {\r
			prevy = (unsigned)code>>27;\r
			pd = scrpos + prevy*LINE_WIDTH*8;\r
		}\r
\r
		// Get tile address/2:\r
		addr=(code&0x7ff)<<4;\r
//		pal=PicoCramHigh+((code>>9)&0x30);\r
		pal=(unsigned char)((code>>9)&0x30);\r
\r
		switch((code>>11)&3) {\r
			case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
			case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
			case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
			case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
		}\r
\r
		if(zero) blank=(short)code;\r
	}\r
}\r
\r
\r
// sx and sy are coords of virtual screen with 8pix borders on top and on left\r
static void DrawSpriteFull(unsigned int *sprite)\r
{\r
	int width=0,height=0;\r
//	unsigned short *pal=NULL;\r
	unsigned char pal;\r
	int tile,code,tdeltax,tdeltay;\r
	unsigned char *scrpos;\r
	int sx, sy;\r
\r
	sy=sprite[0];\r
	height=sy>>24;\r
	sy=(sy&0x1ff)-0x78; // Y\r
	width=(height>>2)&3; height&=3;\r
	width++; height++; // Width and height in tiles\r
\r
	code=sprite[1];\r
	sx=((code>>16)&0x1ff)-0x78; // X\r
\r
	tile=code&0x7ff; // Tile number\r
	tdeltax=height; // Delta to increase tile by going right\r
	tdeltay=1;      // Delta to increase tile by going down\r
	if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r
	if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r
\r
	//delta<<=4; // Delta of address\r
//	pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r
	pal=(unsigned char)((code>>9)&0x30);\r
\r
	// goto first vertically visible tile\r
	while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r
\r
	scrpos = PicoDraw2FB;\r
	scrpos+=(sy-START_ROW*8)*LINE_WIDTH;\r
\r
	for (; height > 0; height--, sy+=8, tile+=tdeltay)\r
	{\r
		int w = width, x=sx, t=tile;\r
\r
		if(sy >= END_ROW*8+8) return; // offscreen\r
\r
		for (; w; w--,x+=8,t+=tdeltax)\r
		{\r
			if(x<=0)   continue;\r
			if(x>=328) break; // Offscreen\r
\r
			t&=0x7fff; // Clip tile address\r
			switch((code>>11)&3) {\r
				case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r
				case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r
				case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r
				case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r
			}\r
		}\r
\r
		scrpos+=8*LINE_WIDTH;\r
	}\r
}\r
#endif\r
\r
\r
static void DrawAllSpritesFull(int prio, int maxwidth)\r
{\r
	struct PicoVideo *pvid=&Pico.video;\r
	int table=0,maskrange=0;\r
	int i,u,link=0;\r
	unsigned int *sprites[80]; // Sprites\r
	int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r
\r
	table=pvid->reg[5]&0x7f;\r
	if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
	table<<=8; // Get sprite table address/2\r
\r
	for (i=u=0; u < 80; u++)\r
	{\r
		unsigned int *sprite=NULL;\r
		int code, code2, sx, sy, height;\r
\r
		sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
\r
		// get sprite info\r
		code = sprite[0];\r
\r
		// check if it is not hidden vertically\r
		sy = (code&0x1ff)-0x80;\r
		height = (((code>>24)&3)+1)<<3;\r
		if(sy+height <= y_min || sy > y_max) goto nextsprite;\r
\r
		// masking sprite?\r
		code2=sprite[1];\r
		sx = (code2>>16)&0x1ff;\r
		if(!sx) {\r
			int to = sy+height; // sy ~ from\r
			if(maskrange) {\r
				// try to merge with previous range\r
				if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r
				else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r
			}\r
			// support only very simple masking (top and bottom of screen)\r
			if(sy <= y_min && to+1 > y_min) y_min = to+1;\r
			else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r
			else maskrange=sy|(to<<16);\r
\r
			goto nextsprite;\r
		}\r
\r
		// priority\r
		if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r
\r
		// check if sprite is not hidden horizontally\r
		sx -= 0x78; // Get X coordinate + 8\r
		if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
\r
		// sprite is good, save it's index\r
		sprites[i++]=sprite;\r
\r
		nextsprite:\r
		// Find next sprite\r
		link=(code>>16)&0x7f;\r
		if(!link) break; // End of sprites\r
	}\r
\r
	// Go through sprites backwards:\r
	for (i-- ;i>=0; i--)\r
	{\r
		DrawSpriteFull(sprites[i]);\r
	}\r
}\r
\r
#ifndef _ASM_DRAW_C\r
static void BackFillFull(int reg7)\r
{\r
	unsigned int back;\r
\r
	// Start with a background color:\r
//	back=PicoCramHigh[reg7&0x3f];\r
	back=reg7&0x3f;\r
	back|=back<<8;\r
	back|=back<<16;\r
\r
	memset32((int *)PicoDraw2FB, back, LINE_WIDTH*(8+(END_ROW-START_ROW)*8)/4);\r
}\r
#endif\r
\r
static void DrawDisplayFull(void)\r
{\r
	struct PicoVideo *pvid=&Pico.video;\r
	int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r
	int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r
	int winstart=START_ROW, winend=END_ROW;     // same for window\r
	int maxw, maxcolc; // max width and col cells\r
\r
	if(pvid->reg[12]&1) {\r
		maxw = 328; maxcolc = 40;\r
	} else {\r
		maxw = 264; maxcolc = 32;\r
	}\r
\r
	// horizontal window?\r
	if ((win=pvid->reg[0x12]))\r
	{\r
		hvwin=1; // hwindow shares display with plane A\r
		edge=win&0x1f;\r
		if(win == 0x80) {\r
			// fullscreen window\r
			hvwin=4;\r
		} else if(win < 0x80) {\r
			// window on the top\r
			     if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r
			else if(edge >= END_ROW)   hvwin=4;\r
			else planestart = winend = edge;\r
		} else if(win > 0x80) {\r
			// window at the bottom\r
			if(edge >= END_ROW) hvwin=0;\r
			else planeend = winstart = edge;\r
		}\r
	}\r
\r
	// check for vertical window, but only if win is not fullscreen\r
	if (hvwin != 4)\r
	{\r
		win=pvid->reg[0x11];\r
		edge=win&0x1f;\r
		if (win&0x80) {\r
			if(!edge) hvwin=4;\r
			else if(edge < (maxcolc>>1)) {\r
				// window is on the right\r
				hvwin|=2;\r
				planeend|=edge<<17;\r
				winstart|=edge<<17;\r
				winend|=maxcolc<<16;\r
			}\r
		} else {\r
			if(edge >= (maxcolc>>1)) hvwin=4;\r
			else if(edge) {\r
				// window is on the left\r
				hvwin|=2;\r
				winend|=edge<<17;\r
				planestart|=edge<<17;\r
				planeend|=maxcolc<<16;\r
			}\r
		}\r
	}\r
\r
	if (hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r
\r
	HighCache2A[1] = HighCache2B[1] = 0;\r
	if (PicoDrawMask & PDRAW_LAYERB_ON)\r
		DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW);\r
	if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r
	{\r
		case 4:\r
		// fullscreen window\r
		DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);\r
		break;\r
\r
		case 3:\r
		// we have plane A and both v and h windows\r
		DrawLayerFull(0, HighCache2A, planestart, planeend);\r
		DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h\r
		DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0);    // v\r
		break;\r
\r
		case 2:\r
		case 1:\r
		// both window and plane A visible, window is vertical XOR horizontal\r
		DrawLayerFull(0, HighCache2A, planestart, planeend);\r
		DrawWindowFull(winstart, winend, 0);\r
		break;\r
\r
		default:\r
		// fullscreen plane A\r
		DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW);\r
		break;\r
	}\r
	if (PicoDrawMask & PDRAW_SPRITES_LOW_ON)\r
		DrawAllSpritesFull(0, maxw);\r
\r
	if (HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);\r
	if (HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);\r
	if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r
	{\r
		case 4:\r
		// fullscreen window\r
		DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);\r
		break;\r
\r
		case 3:\r
		// we have plane A and both v and h windows\r
		DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h\r
		DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1);    // v\r
		break;\r
\r
		case 2:\r
		case 1:\r
		// both window and plane A visible, window is vertical XOR horizontal\r
		DrawWindowFull(winstart, winend, 1);\r
		break;\r
	}\r
	if (PicoDrawMask & PDRAW_SPRITES_HI_ON)\r
		DrawAllSpritesFull(1, maxw);\r
}\r
\r
\r
PICO_INTERNAL void PicoFrameFull()\r
{\r
	// prepare cram?\r
	if (PicoPrepareCram) PicoPrepareCram();\r
\r
	// Draw screen:\r
	BackFillFull(Pico.video.reg[7]);\r
	if (Pico.video.reg[1]&0x40) DrawDisplayFull();\r
}\r
\r
Commit	Line	Data
cc68a136	1	// This is part of Pico Library\r
cc68a136	2	\r
6cadc2da	3	// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
cc68a136	4	// Free for non-commercial use.\r
	5	\r
	6	// For commercial use, separate licencing terms must be obtained.\r
	7	\r
	8	\r
	9	// this is a frame-based renderer, alternative to Dave's line based which is in Draw.c\r
	10	\r
	11	\r
efcba75f	12	#include "pico_int.h"\r
cc68a136	13	\r
	14	// port_config.h include must define these 2 defines:\r
	15	// #define START_ROW 1 // which row of tiles to start rendering at?\r
	16	// #define END_ROW 27 // ..end\r
	17	// one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.\r
	18	\r
	19	#define TILE_ROWS END_ROW-START_ROW\r
	20	\r
	21	#define USE_CACHE\r
	22	\r
9112b6ce	23	// note: this is not implemented in ARM asm\r
	24	#if defined(DRAW2_OVERRIDE_LINE_WIDTH)\r
	25	#define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH\r
	26	#else\r
	27	#define LINE_WIDTH 328\r
	28	#endif\r
cc68a136	29	\r
eff55556	30	static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r
eff55556	31	static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r
cc68a136	32	\r
	33	unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r
	34	void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to use\r
	35	\r
	36	\r
	37	// stuff available in asm:\r
	38	#ifdef _ASM_DRAW_C\r
	39	void BackFillFull(int reg7);\r
	40	void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r
	41	void DrawTilesFromCacheF(int *hc);\r
	42	void DrawWindowFull(int start, int end, int prio);\r
	43	void DrawSpriteFull(unsigned int *sprite);\r
	44	#else\r
	45	\r
	46	\r
	47	static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r
	48	{\r
	49	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	50	int i;\r
	51	\r
9112b6ce	52	for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
cc68a136	53	pack=(unsigned int )(Pico.vram+addr); // Get 8 pixels\r
	54	if(!pack) continue;\r
	55	\r
	56	t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)\|pal);\r
	57	t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)\|pal);\r
	58	t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)\|pal);\r
	59	t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )\|pal);\r
	60	t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)\|pal);\r
	61	t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)\|pal);\r
	62	t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)\|pal);\r
	63	t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)\|pal);\r
	64	blank = 0;\r
	65	}\r
	66	\r
	67	return blank; // Tile blank?\r
	68	}\r
	69	\r
	70	static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r
	71	{\r
	72	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	73	int i;\r
	74	\r
9112b6ce	75	for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
cc68a136	76	pack=(unsigned int )(Pico.vram+addr); // Get 8 pixels\r
	77	if(!pack) continue;\r
	78	\r
	79	t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)\|pal);\r
	80	t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)\|pal);\r
	81	t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)\|pal);\r
	82	t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)\|pal);\r
	83	t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )\|pal);\r
	84	t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)\|pal);\r
	85	t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)\|pal);\r
	86	t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)\|pal);\r
	87	blank = 0;\r
	88	}\r
	89	return blank; // Tile blank?\r
	90	}\r
	91	\r
	92	static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r
	93	{\r
	94	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	95	int i;\r
	96	\r
	97	addr+=14;\r
9112b6ce	98	for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
cc68a136	99	pack=(unsigned int )(Pico.vram+addr); // Get 8 pixels\r
	100	if(!pack) continue;\r
	101	\r
	102	t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)\|pal);\r
	103	t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)\|pal);\r
	104	t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)\|pal);\r
	105	t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )\|pal);\r
	106	t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)\|pal);\r
	107	t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)\|pal);\r
	108	t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)\|pal);\r
	109	t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)\|pal);\r
	110	blank = 0;\r
	111	}\r
	112	\r
	113	return blank; // Tile blank?\r
	114	}\r
	115	\r
	116	static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r
	117	{\r
	118	unsigned int pack=0; unsigned int t=0, blank = 1;\r
	119	int i;\r
	120	\r
	121	addr+=14;\r
9112b6ce	122	for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
cc68a136	123	pack=(unsigned int )(Pico.vram+addr); // Get 8 pixels\r
	124	if(!pack) continue;\r
	125	\r
	126	t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)\|pal);\r
	127	t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)\|pal);\r
	128	t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)\|pal);\r
	129	t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)\|pal);\r
	130	t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )\|pal);\r
	131	t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)\|pal);\r
	132	t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)\|pal);\r
	133	t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)\|pal);\r
	134	blank = 0;\r
	135	}\r
	136	return blank; // Tile blank?\r
	137	}\r
	138	\r
	139	\r
	140	// start: (tile_start<<16)\|row_start, end: [same]\r
	141	static void DrawWindowFull(int start, int end, int prio)\r
	142	{\r
	143	struct PicoVideo *pvid=&Pico.video;\r
	144	int nametab, nametab_step, trow, tilex, blank=-1, code;\r
e5f426aa	145	unsigned char *scrpos = PicoDraw2FB;\r
cc68a136	146	int tile_start, tile_end; // in cells\r
	147	\r
	148	// parse ranges\r
	149	tile_start = start>>16;\r
	150	tile_end = end>>16;\r
	151	start = start<<16>>16;\r
	152	end = end<<16>>16;\r
	153	\r
	154	// Find name table line:\r
	155	if (pvid->reg[12]&1)\r
	156	{\r
	157	nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
	158	nametab_step = 1<<6;\r
	159	}\r
	160	else\r
	161	{\r
	162	nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
	163	nametab_step = 1<<5;\r
	164	}\r
	165	nametab += nametab_step*start;\r
	166	\r
	167	// check priority\r
	168	code=Pico.vram[nametab+tile_start];\r
	169	if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r
	170	\r
9112b6ce	171	scrpos+=8*LINE_WIDTH+8;\r
9112b6ce	172	scrpos+=8LINE_WIDTH(start-START_ROW);\r
cc68a136	173	\r
	174	// do a window until we reach planestart row\r
	175	for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r
	176	for (tilex=tile_start; tilex<tile_end; tilex++)\r
	177	{\r
	178	int code,addr,zero=0;\r
	179	// unsigned short *pal=NULL;\r
	180	unsigned char pal;\r
	181	\r
	182	code=Pico.vram[nametab+tilex];\r
	183	if (code==blank) continue;\r
	184	\r
	185	// Get tile address/2:\r
	186	addr=(code&0x7ff)<<4;\r
	187	\r
	188	// pal=PicoCramHigh+((code>>9)&0x30);\r
	189	pal=(unsigned char)((code>>9)&0x30);\r
	190	\r
	191	switch((code>>11)&3) {\r
	192	case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r
	193	case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r
	194	case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r
	195	case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r
	196	}\r
	197	if(zero) blank=code; // We know this tile is blank now\r
	198	}\r
	199	\r
9112b6ce	200	scrpos += LINE_WIDTH*8;\r
cc68a136	201	}\r
	202	}\r
	203	\r
	204	\r
	205	static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r
	206	{\r
	207	struct PicoVideo *pvid=&Pico.video;\r
	208	static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r
	209	int width, height, ymask, htab;\r
	210	int nametab, hscroll=0, vscroll, cells;\r
	211	unsigned char *scrpos;\r
	212	int blank=-1, xmask, nametab_row, trow;\r
	213	\r
	214	// parse ranges\r
	215	cells = (planeend>>16)-(planestart>>16);\r
	216	planestart = planestart<<16>>16;\r
	217	planeend = planeend<<16>>16;\r
	218	\r
	219	// Work out the Tiles to draw\r
	220	\r
	221	htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
	222	// if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r
	223	// if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
	224	htab+=plane; // A or B\r
	225	\r
	226	if(!(pvid->reg[11]&3)) { // full screen scroll\r
	227	// Get horizontal scroll value\r
	228	hscroll=Pico.vram[htab&0x7fff];\r
	229	htab = 0; // this marks that we don't have to update scroll value\r
	230	}\r
	231	\r
	232	// Work out the name table size: 32 64 or 128 tiles (0-3)\r
	233	width=pvid->reg[16];\r
	234	height=(width>>4)&3; width&=3;\r
	235	\r
	236	xmask=(1<<shift[width ])-1; // X Mask in tiles\r
eff55556	237	ymask=(height<<5)\|0x1f; // Y Mask in tiles\r
	238	if(width == 1) ymask&=0x3f;\r
	239	else if(width>1) ymask =0x1f;\r
cc68a136	240	\r
	241	// Find name table:\r
	242	if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r
	243	else nametab=(pvid->reg[4]&0x07)<<12; // B\r
	244	\r
e5f426aa	245	scrpos = PicoDraw2FB;\r
9112b6ce	246	scrpos+=8LINE_WIDTH(planestart-START_ROW);\r
cc68a136	247	\r
	248	// Get vertical scroll value:\r
	249	vscroll=Pico.vsram[plane]&0x1ff;\r
9112b6ce	250	scrpos+=(8-(vscroll&7))*LINE_WIDTH;\r
cc68a136	251	if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r
	252	\r
	253	*hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r
	254	\r
	255	\r
	256	for(trow = planestart; trow < planeend; trow++) { // current tile row\r
	257	int cellc=cells,tilex,dx;\r
	258	\r
	259	// Find the tile row in the name table\r
	260	//ts.line=(vscroll+Scanline)&ymask;\r
	261	//ts.nametab+=(ts.line>>3)<<shift[width];\r
	262	nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r
	263	\r
	264	// update hscroll if needed\r
	265	if(htab) {\r
	266	int htaddr=htab+(trow<<4);\r
	267	if(trow) htaddr-=(vscroll&7)<<1;\r
	268	hscroll=Pico.vram[htaddr&0x7fff];\r
	269	}\r
	270	\r
	271	// Draw tiles across screen:\r
	272	tilex=(-hscroll)>>3;\r
	273	dx=((hscroll-1)&7)+1;\r
	274	if(dx != 8) cellc++; // have hscroll, do more cells\r
	275	\r
	276	for (; cellc; dx+=8,tilex++,cellc--)\r
	277	{\r
	278	int code=0,addr=0,zero=0;\r
	279	// unsigned short *pal=NULL;\r
	280	unsigned char pal;\r
	281	\r
	282	code=Pico.vram[nametab_row+(tilex&xmask)];\r
	283	if (code==blank) continue;\r
	284	\r
cc68a136	285	if (code>>15) { // high priority tile\r
cc68a136	286	*hcache++ = code\|(dx<<16)\|(trow<<27); // cache it\r
cc68a136	287	continue;\r
	288	}\r
	289	\r
	290	// Get tile address/2:\r
	291	addr=(code&0x7ff)<<4;\r
	292	\r
	293	// pal=PicoCramHigh+((code>>9)&0x30);\r
	294	pal=(unsigned char)((code>>9)&0x30);\r
	295	\r
	296	switch((code>>11)&3) {\r
	297	case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r
	298	case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r
	299	case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r
	300	case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r
	301	}\r
	302	if(zero) blank=code; // We know this tile is blank now\r
	303	}\r
	304	\r
9112b6ce	305	scrpos += LINE_WIDTH*8;\r
cc68a136	306	}\r
	307	\r
	308	*hcache = 0; // terminate cache\r
	309	}\r
	310	\r
	311	\r
	312	static void DrawTilesFromCacheF(int *hc)\r
	313	{\r
	314	int code, addr, zero = 0;\r
	315	unsigned int prevy=0xFFFFFFFF;\r
	316	// unsigned short *pal;\r
	317	unsigned char pal;\r
	318	short blank=-1; // The tile we know is blank\r
e5f426aa	319	unsigned char scrpos = PicoDraw2FB, pd = 0;\r
cc68a136	320	\r
cc68a136	321	// *hcache++ = code\|(dx<<16)\|(trow<<27); // cache it\r
9112b6ce	322	scrpos+=(hc++)LINE_WIDTH - START_ROWLINE_WIDTH8;\r
cc68a136	323	\r
	324	while((code=*hc++)) {\r
	325	if((short)code == blank) continue;\r
	326	\r
	327	// y pos\r
	328	if(((unsigned)code>>27) != prevy) {\r
	329	prevy = (unsigned)code>>27;\r
9112b6ce	330	pd = scrpos + prevyLINE_WIDTH8;\r
cc68a136	331	}\r
	332	\r
	333	// Get tile address/2:\r
	334	addr=(code&0x7ff)<<4;\r
	335	// pal=PicoCramHigh+((code>>9)&0x30);\r
	336	pal=(unsigned char)((code>>9)&0x30);\r
	337	\r
	338	switch((code>>11)&3) {\r
	339	case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
	340	case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
	341	case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
	342	case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
	343	}\r
	344	\r
	345	if(zero) blank=(short)code;\r
	346	}\r
	347	}\r
	348	\r
	349	\r
	350	// sx and sy are coords of virtual screen with 8pix borders on top and on left\r
	351	static void DrawSpriteFull(unsigned int *sprite)\r
	352	{\r
	353	int width=0,height=0;\r
	354	// unsigned short *pal=NULL;\r
	355	unsigned char pal;\r
	356	int tile,code,tdeltax,tdeltay;\r
	357	unsigned char *scrpos;\r
	358	int sx, sy;\r
	359	\r
	360	sy=sprite[0];\r
	361	height=sy>>24;\r
	362	sy=(sy&0x1ff)-0x78; // Y\r
	363	width=(height>>2)&3; height&=3;\r
	364	width++; height++; // Width and height in tiles\r
	365	\r
	366	code=sprite[1];\r
	367	sx=((code>>16)&0x1ff)-0x78; // X\r
	368	\r
	369	tile=code&0x7ff; // Tile number\r
	370	tdeltax=height; // Delta to increase tile by going right\r
	371	tdeltay=1; // Delta to increase tile by going down\r
	372	if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r
	373	if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r
	374	\r
	375	//delta<<=4; // Delta of address\r
	376	// pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r
	377	pal=(unsigned char)((code>>9)&0x30);\r
	378	\r
	379	// goto first vertically visible tile\r
	380	while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r
	381	\r
e5f426aa	382	scrpos = PicoDraw2FB;\r
9112b6ce	383	scrpos+=(sy-START_ROW8)LINE_WIDTH;\r
cc68a136	384	\r
	385	for (; height > 0; height--, sy+=8, tile+=tdeltay)\r
	386	{\r
	387	int w = width, x=sx, t=tile;\r
	388	\r
	389	if(sy >= END_ROW*8+8) return; // offscreen\r
	390	\r
	391	for (; w; w--,x+=8,t+=tdeltax)\r
	392	{\r
	393	if(x<=0) continue;\r
	394	if(x>=328) break; // Offscreen\r
	395	\r
	396	t&=0x7fff; // Clip tile address\r
	397	switch((code>>11)&3) {\r
	398	case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r
	399	case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r
	400	case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r
	401	case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r
	402	}\r
	403	}\r
	404	\r
9112b6ce	405	scrpos+=8*LINE_WIDTH;\r
cc68a136	406	}\r
	407	}\r
	408	#endif\r
	409	\r
	410	\r
	411	static void DrawAllSpritesFull(int prio, int maxwidth)\r
	412	{\r
	413	struct PicoVideo *pvid=&Pico.video;\r
	414	int table=0,maskrange=0;\r
	415	int i,u,link=0;\r
	416	unsigned int *sprites[80]; // Sprites\r
	417	int y_min=START_ROW8, y_max=END_ROW8; // for a simple sprite masking\r
	418	\r
	419	table=pvid->reg[5]&0x7f;\r
	420	if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
	421	table<<=8; // Get sprite table address/2\r
	422	\r
	423	for (i=u=0; u < 80; u++)\r
	424	{\r
	425	unsigned int *sprite=NULL;\r
	426	int code, code2, sx, sy, height;\r
	427	\r
	428	sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
	429	\r
	430	// get sprite info\r
	431	code = sprite[0];\r
	432	\r
	433	// check if it is not hidden vertically\r
	434	sy = (code&0x1ff)-0x80;\r
	435	height = (((code>>24)&3)+1)<<3;\r
	436	if(sy+height <= y_min \|\| sy > y_max) goto nextsprite;\r
	437	\r
	438	// masking sprite?\r
	439	code2=sprite[1];\r
	440	sx = (code2>>16)&0x1ff;\r
	441	if(!sx) {\r
	442	int to = sy+height; // sy ~ from\r
	443	if(maskrange) {\r
	444	// try to merge with previous range\r
	445	if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r
	446	else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r
	447	}\r
	448	// support only very simple masking (top and bottom of screen)\r
	449	if(sy <= y_min && to+1 > y_min) y_min = to+1;\r
	450	else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r
	451	else maskrange=sy\|(to<<16);\r
	452	\r
	453	goto nextsprite;\r
	454	}\r
	455	\r
	456	// priority\r
	457	if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r
	458	\r
	459	// check if sprite is not hidden horizontally\r
	460	sx -= 0x78; // Get X coordinate + 8\r
	461	if(sx <= -8*3 \|\| sx >= maxwidth) goto nextsprite;\r
	462	\r
	463	// sprite is good, save it's index\r
	464	sprites[i++]=sprite;\r
	465	\r
	466	nextsprite:\r
	467	// Find next sprite\r
	468	link=(code>>16)&0x7f;\r
	469	if(!link) break; // End of sprites\r
470	}\r
471	\r
472	// Go through sprites backwards:\r
473	for (i-- ;i>=0; i--)\r
474	{\r
475	DrawSpriteFull(sprites[i]);\r
476	}\r
477	}\r
478	\r
479	#ifndef _ASM_DRAW_C\r
480	static void BackFillFull(int reg7)\r
481	{\r
b542be46	482	unsigned int back;\r
cc68a136	483	\r
	484	// Start with a background color:\r
	485	// back=PicoCramHigh[reg7&0x3f];\r
	486	back=reg7&0x3f;\r
	487	back\|=back<<8;\r
	488	back\|=back<<16;\r
	489	\r
b542be46	490	memset32((int )PicoDraw2FB, back, LINE_WIDTH(8+(END_ROW-START_ROW)*8)/4);\r
cc68a136	491	}\r
	492	#endif\r
	493	\r
f579f7b8	494	static void DrawDisplayFull(void)\r
cc68a136	495	{\r
	496	struct PicoVideo *pvid=&Pico.video;\r
	497	int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r
	498	int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r
	499	int winstart=START_ROW, winend=END_ROW; // same for window\r
	500	int maxw, maxcolc; // max width and col cells\r
	501	\r
	502	if(pvid->reg[12]&1) {\r
	503	maxw = 328; maxcolc = 40;\r
	504	} else {\r
	505	maxw = 264; maxcolc = 32;\r
	506	}\r
	507	\r
	508	// horizontal window?\r
f579f7b8	509	if ((win=pvid->reg[0x12]))\r
f579f7b8	510	{\r
cc68a136	511	hvwin=1; // hwindow shares display with plane A\r
	512	edge=win&0x1f;\r
	513	if(win == 0x80) {\r
	514	// fullscreen window\r
	515	hvwin=4;\r
	516	} else if(win < 0x80) {\r
	517	// window on the top\r
	518	if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r
	519	else if(edge >= END_ROW) hvwin=4;\r
	520	else planestart = winend = edge;\r
	521	} else if(win > 0x80) {\r
	522	// window at the bottom\r
	523	if(edge >= END_ROW) hvwin=0;\r
	524	else planeend = winstart = edge;\r
	525	}\r
	526	}\r
	527	\r
	528	// check for vertical window, but only if win is not fullscreen\r
f579f7b8	529	if (hvwin != 4)\r
f579f7b8	530	{\r
cc68a136	531	win=pvid->reg[0x11];\r
	532	edge=win&0x1f;\r
	533	if (win&0x80) {\r
	534	if(!edge) hvwin=4;\r
	535	else if(edge < (maxcolc>>1)) {\r
	536	// window is on the right\r
	537	hvwin\|=2;\r
	538	planeend\|=edge<<17;\r
	539	winstart\|=edge<<17;\r
	540	winend\|=maxcolc<<16;\r
	541	}\r
	542	} else {\r
	543	if(edge >= (maxcolc>>1)) hvwin=4;\r
	544	else if(edge) {\r
	545	// window is on the left\r
	546	hvwin\|=2;\r
	547	winend\|=edge<<17;\r
	548	planestart\|=edge<<17;\r
	549	planeend\|=maxcolc<<16;\r
	550	}\r
	551	}\r
	552	}\r
	553	\r
f579f7b8	554	if (hvwin==1) { winend\|=maxcolc<<16; planeend\|=maxcolc<<16; }\r
cc68a136	555	\r
f579f7b8	556	HighCache2A[1] = HighCache2B[1] = 0;\r
	557	if (PicoDrawMask & PDRAW_LAYERB_ON)\r
	558	DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)\|END_ROW);\r
	559	if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r
	560	{\r
cc68a136	561	case 4:\r
	562	// fullscreen window\r
	563	DrawWindowFull(START_ROW, (maxcolc<<16)\|END_ROW, 0);\r
cc68a136	564	break;\r
	565	\r
	566	case 3:\r
	567	// we have plane A and both v and h windows\r
eff55556	568	DrawLayerFull(0, HighCache2A, planestart, planeend);\r
cc68a136	569	DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)\|(maxcolc<<16), 0); // h\r
	570	DrawWindowFull((winstart&~0xff)\|START_ROW, (winend&~0xff)\|END_ROW, 0); // v\r
	571	break;\r
	572	\r
	573	case 2:\r
	574	case 1:\r
	575	// both window and plane A visible, window is vertical XOR horizontal\r
eff55556	576	DrawLayerFull(0, HighCache2A, planestart, planeend);\r
cc68a136	577	DrawWindowFull(winstart, winend, 0);\r
	578	break;\r
	579	\r
	580	default:\r
	581	// fullscreen plane A\r
eff55556	582	DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)\|END_ROW);\r
cc68a136	583	break;\r
cc68a136	584	}\r
f579f7b8	585	if (PicoDrawMask & PDRAW_SPRITES_LOW_ON)\r
f579f7b8	586	DrawAllSpritesFull(0, maxw);\r
cc68a136	587	\r
f579f7b8	588	if (HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);\r
f579f7b8	589	if (HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);\r
8cf22667	590	if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r
f579f7b8	591	{\r
cc68a136	592	case 4:\r
	593	// fullscreen window\r
	594	DrawWindowFull(START_ROW, (maxcolc<<16)\|END_ROW, 1);\r
	595	break;\r
	596	\r
	597	case 3:\r
	598	// we have plane A and both v and h windows\r
	599	DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)\|(maxcolc<<16), 1); // h\r
	600	DrawWindowFull((winstart&~0xff)\|START_ROW, (winend&~0xff)\|END_ROW, 1); // v\r
	601	break;\r
	602	\r
	603	case 2:\r
	604	case 1:\r
	605	// both window and plane A visible, window is vertical XOR horizontal\r
	606	DrawWindowFull(winstart, winend, 1);\r
	607	break;\r
	608	}\r
f579f7b8	609	if (PicoDrawMask & PDRAW_SPRITES_HI_ON)\r
f579f7b8	610	DrawAllSpritesFull(1, maxw);\r
cc68a136	611	}\r
	612	\r
	613	\r
eff55556	614	PICO_INTERNAL void PicoFrameFull()\r
cc68a136	615	{\r
cc68a136	616	// prepare cram?\r
f579f7b8	617	if (PicoPrepareCram) PicoPrepareCram();\r
cc68a136	618	\r
	619	// Draw screen:\r
	620	BackFillFull(Pico.video.reg[7]);\r
	621	if (Pico.video.reg[1]&0x40) DrawDisplayFull();\r
	622	}\r
	623	\r