625 lines
18 KiB
C
625 lines
18 KiB
C
/*
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* tile renderer
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* (C) notaz, 2006-2008
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*
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* This work is licensed under the terms of MAME license.
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* See COPYING file in the top-level directory.
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*/
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#include "pico_int.h"
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#define START_ROW 0 // which row of tiles to start rendering at?
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#define END_ROW 28 // ..end
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#define TILE_ROWS END_ROW-START_ROW
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// note: this is not implemented in ARM asm
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#if defined(DRAW2_OVERRIDE_LINE_WIDTH)
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#define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH
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#else
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#define LINE_WIDTH 328
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#endif
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static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];
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unsigned char *PicoDraw2FB = PicoDraw2FB_;
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static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers
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static int HighCache2B[41*(TILE_ROWS+1)+1+1];
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unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)
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void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to use
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// stuff available in asm:
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#ifdef _ASM_DRAW_C
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void BackFillFull(int reg7);
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void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);
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void DrawTilesFromCacheF(int *hc);
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void DrawWindowFull(int start, int end, int prio);
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void DrawSpriteFull(unsigned int *sprite);
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#else
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static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)
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{
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unsigned int pack=0; unsigned int t=0, blank = 1;
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int i;
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for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if(!pack) continue;
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t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);
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t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);
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t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);
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t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);
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t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);
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t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);
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t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);
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t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);
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blank = 0;
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}
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return blank; // Tile blank?
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}
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static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)
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{
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unsigned int pack=0; unsigned int t=0, blank = 1;
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int i;
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for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if(!pack) continue;
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t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);
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t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);
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t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);
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t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);
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t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);
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t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);
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t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);
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t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);
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blank = 0;
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}
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return blank; // Tile blank?
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}
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static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)
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{
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unsigned int pack=0; unsigned int t=0, blank = 1;
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int i;
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addr+=14;
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for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if(!pack) continue;
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t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);
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t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);
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t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);
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t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);
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t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);
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t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);
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t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);
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t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);
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blank = 0;
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}
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return blank; // Tile blank?
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}
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static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)
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{
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unsigned int pack=0; unsigned int t=0, blank = 1;
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int i;
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addr+=14;
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for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if(!pack) continue;
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t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);
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t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);
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t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);
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t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);
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t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);
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t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);
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t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);
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t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);
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blank = 0;
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}
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return blank; // Tile blank?
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}
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// start: (tile_start<<16)|row_start, end: [same]
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static void DrawWindowFull(int start, int end, int prio)
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{
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struct PicoVideo *pvid=&Pico.video;
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int nametab, nametab_step, trow, tilex, blank=-1, code;
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unsigned char *scrpos = PicoDraw2FB;
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int tile_start, tile_end; // in cells
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// parse ranges
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tile_start = start>>16;
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tile_end = end>>16;
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start = start<<16>>16;
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end = end<<16>>16;
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// Find name table line:
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if (pvid->reg[12]&1)
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{
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nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
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nametab_step = 1<<6;
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}
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else
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{
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nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
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nametab_step = 1<<5;
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}
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nametab += nametab_step*start;
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// check priority
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code=Pico.vram[nametab+tile_start];
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if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority
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scrpos+=8*LINE_WIDTH+8;
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scrpos+=8*LINE_WIDTH*(start-START_ROW);
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// do a window until we reach planestart row
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for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row
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for (tilex=tile_start; tilex<tile_end; tilex++)
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{
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int code,addr,zero=0;
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// unsigned short *pal=NULL;
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unsigned char pal;
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code=Pico.vram[nametab+tilex];
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if (code==blank) continue;
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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// pal=PicoCramHigh+((code>>9)&0x30);
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pal=(unsigned char)((code>>9)&0x30);
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switch((code>>11)&3) {
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case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;
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case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;
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case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;
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case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;
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}
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if(zero) blank=code; // We know this tile is blank now
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}
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scrpos += LINE_WIDTH*8;
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}
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}
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static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)
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{
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struct PicoVideo *pvid=&Pico.video;
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static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps
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int width, height, ymask, htab;
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int nametab, hscroll=0, vscroll, cells;
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unsigned char *scrpos;
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int blank=-1, xmask, nametab_row, trow;
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// parse ranges
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cells = (planeend>>16)-(planestart>>16);
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planestart = planestart<<16>>16;
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planeend = planeend<<16>>16;
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// Work out the Tiles to draw
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htab=pvid->reg[13]<<9; // Horizontal scroll table address
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// if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line
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// if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
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htab+=plane; // A or B
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if(!(pvid->reg[11]&3)) { // full screen scroll
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// Get horizontal scroll value
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hscroll=Pico.vram[htab&0x7fff];
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htab = 0; // this marks that we don't have to update scroll value
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}
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// Work out the name table size: 32 64 or 128 tiles (0-3)
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width=pvid->reg[16];
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height=(width>>4)&3; width&=3;
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xmask=(1<<shift[width ])-1; // X Mask in tiles
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ymask=(height<<5)|0x1f; // Y Mask in tiles
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if(width == 1) ymask&=0x3f;
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else if(width>1) ymask =0x1f;
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// Find name table:
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if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A
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else nametab=(pvid->reg[4]&0x07)<<12; // B
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scrpos = PicoDraw2FB;
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scrpos+=8*LINE_WIDTH*(planestart-START_ROW);
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// Get vertical scroll value:
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vscroll=Pico.vsram[plane]&0x1ff;
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scrpos+=(8-(vscroll&7))*LINE_WIDTH;
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if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row
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*hcache++ = 8-(vscroll&7); // push y-offset to tilecache
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for(trow = planestart; trow < planeend; trow++) { // current tile row
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int cellc=cells,tilex,dx;
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// Find the tile row in the name table
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//ts.line=(vscroll+Scanline)&ymask;
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//ts.nametab+=(ts.line>>3)<<shift[width];
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nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row
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// update hscroll if needed
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if(htab) {
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int htaddr=htab+(trow<<4);
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if(trow) htaddr-=(vscroll&7)<<1;
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hscroll=Pico.vram[htaddr&0x7fff];
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}
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// Draw tiles across screen:
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tilex=(-hscroll)>>3;
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dx=((hscroll-1)&7)+1;
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if(dx != 8) cellc++; // have hscroll, do more cells
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for (; cellc; dx+=8,tilex++,cellc--)
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{
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int code=0,addr=0,zero=0;
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// unsigned short *pal=NULL;
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unsigned char pal;
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code=Pico.vram[nametab_row+(tilex&xmask)];
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if (code==blank) continue;
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if (code>>15) { // high priority tile
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*hcache++ = code|(dx<<16)|(trow<<27); // cache it
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continue;
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}
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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// pal=PicoCramHigh+((code>>9)&0x30);
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pal=(unsigned char)((code>>9)&0x30);
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switch((code>>11)&3) {
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case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;
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case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;
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case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;
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case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;
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}
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if(zero) blank=code; // We know this tile is blank now
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}
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scrpos += LINE_WIDTH*8;
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}
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*hcache = 0; // terminate cache
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}
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static void DrawTilesFromCacheF(int *hc)
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{
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int code, addr, zero = 0;
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unsigned int prevy=0xFFFFFFFF;
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// unsigned short *pal;
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unsigned char pal;
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short blank=-1; // The tile we know is blank
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unsigned char *scrpos = PicoDraw2FB, *pd = 0;
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// *hcache++ = code|(dx<<16)|(trow<<27); // cache it
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scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;
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while((code=*hc++)) {
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if((short)code == blank) continue;
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// y pos
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if(((unsigned)code>>27) != prevy) {
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prevy = (unsigned)code>>27;
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pd = scrpos + prevy*LINE_WIDTH*8;
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}
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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// pal=PicoCramHigh+((code>>9)&0x30);
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pal=(unsigned char)((code>>9)&0x30);
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switch((code>>11)&3) {
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case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;
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case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;
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case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;
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case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;
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}
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if(zero) blank=(short)code;
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}
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}
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// sx and sy are coords of virtual screen with 8pix borders on top and on left
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static void DrawSpriteFull(unsigned int *sprite)
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{
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int width=0,height=0;
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// unsigned short *pal=NULL;
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unsigned char pal;
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int tile,code,tdeltax,tdeltay;
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unsigned char *scrpos;
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int sx, sy;
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sy=sprite[0];
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height=sy>>24;
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sy=(sy&0x1ff)-0x78; // Y
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width=(height>>2)&3; height&=3;
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width++; height++; // Width and height in tiles
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code=sprite[1];
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sx=((code>>16)&0x1ff)-0x78; // X
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tile=code&0x7ff; // Tile number
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tdeltax=height; // Delta to increase tile by going right
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tdeltay=1; // Delta to increase tile by going down
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if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X
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if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y
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//delta<<=4; // Delta of address
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// pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer
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pal=(unsigned char)((code>>9)&0x30);
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// goto first vertically visible tile
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while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }
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scrpos = PicoDraw2FB;
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scrpos+=(sy-START_ROW*8)*LINE_WIDTH;
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for (; height > 0; height--, sy+=8, tile+=tdeltay)
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{
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int w = width, x=sx, t=tile;
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if(sy >= END_ROW*8+8) return; // offscreen
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for (; w; w--,x+=8,t+=tdeltax)
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{
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if(x<=0) continue;
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if(x>=328) break; // Offscreen
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t&=0x7fff; // Clip tile address
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switch((code>>11)&3) {
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case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;
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case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;
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case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;
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case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;
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}
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}
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scrpos+=8*LINE_WIDTH;
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}
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}
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#endif
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static void DrawAllSpritesFull(int prio, int maxwidth)
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{
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struct PicoVideo *pvid=&Pico.video;
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int table=0,maskrange=0;
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int i,u,link=0;
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unsigned int *sprites[80]; // Sprites
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int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking
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table=pvid->reg[5]&0x7f;
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if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
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table<<=8; // Get sprite table address/2
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for (i=u=0; u < 80; u++)
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{
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unsigned int *sprite=NULL;
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int code, code2, sx, sy, height;
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sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
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// get sprite info
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code = sprite[0];
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// check if it is not hidden vertically
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sy = (code&0x1ff)-0x80;
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height = (((code>>24)&3)+1)<<3;
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if(sy+height <= y_min || sy > y_max) goto nextsprite;
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// masking sprite?
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code2=sprite[1];
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sx = (code2>>16)&0x1ff;
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if(!sx) {
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int to = sy+height; // sy ~ from
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if(maskrange) {
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// try to merge with previous range
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if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);
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else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);
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}
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// support only very simple masking (top and bottom of screen)
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if(sy <= y_min && to+1 > y_min) y_min = to+1;
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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()
|
|
{
|
|
pprof_start(draw);
|
|
|
|
// prepare cram?
|
|
if (PicoPrepareCram) PicoPrepareCram();
|
|
|
|
// Draw screen:
|
|
BackFillFull(Pico.video.reg[7]);
|
|
if (Pico.video.reg[1] & 0x40)
|
|
DrawDisplayFull();
|
|
|
|
pprof_end(draw);
|
|
}
|
|
|