473 lines
11 KiB
C
473 lines
11 KiB
C
//contains routines for blending images (as well as blitting 32bit to 8bit type stuff)
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#include "quakedef.h"
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#include "d_local.h"
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#include "r_local.h"
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void MakeVideoPalette(void);
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void MakeSwizzledPalette(void);
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int *srctable;
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int *dsttable;
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qbyte *pal555to8;
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int swzpal[TRANS_LEVELS][256];
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#define palette host_basepal
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#define _abs(x) ((x)*(x))
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void D_InitTrans(void)
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{
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// create pal555to8 and swizzled palette
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MakeVideoPalette();
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MakeSwizzledPalette();
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srctable = swzpal[0];
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dsttable = swzpal[TRANS_MAX];
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}
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#if 0
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#define Trans(p, p2) (t_curlookupp[p][p2])
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#else
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// TODO: INLINE THESE FUNCTIONS
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qbyte FASTCALL Trans(qbyte p, qbyte p2)
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{
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int x;
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x = (srctable[p] + dsttable[p2]) | 0x01F07C1F;
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return pal555to8[x & (x >> 15)];
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}
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#endif
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qbyte FASTCALL AddBlend(qbyte p, qbyte p2)
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{
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int x, y;
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x = (srctable[p] + dsttable[p2]);
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y = x & 0x40100400; // overflow bits
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x = (x | 0x01F07C1F) & 0x3FFFFFFF;
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y = y - (y >> 5);
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x = x | y;
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return pal555to8[x & (x >> 15)];
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}
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/*
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void Set_TransLevelI(int level)
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{
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t_curtable = level/(100.0f/(t_numtables-1));
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t_curlookupp = t_lookup[t_curtable];
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}
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*/
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void D_SetTransLevel(float level, blendmode_t blend) //MUST be between 0 and 1
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{
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int ilvl;
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// cap and set level
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ilvl = (bound(0, level, 1) * (TRANS_MAX + 0.99));
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// set blending tables
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switch (blend)
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{
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case BM_ADD:
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dsttable = swzpal[ilvl];
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srctable = swzpal[TRANS_MAX];
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break;
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default:
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dsttable = swzpal[ilvl];
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srctable = swzpal[TRANS_MAX - ilvl];
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}
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}
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#define _abs(x) ((x)*(x))
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qbyte FindIndexFromRGB(int red, int green, int blue)
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{
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int i, best=15;
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int bestdif=256*256*256, curdif;
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extern qbyte *host_basepal;
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qbyte *pa;
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pa = host_basepal;
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for (i = 0; i < 256; i++, pa+=3)
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{
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curdif = _abs(red - pa[0]) + _abs(green - pa[1]) + _abs(blue - pa[2]);
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if (curdif < bestdif)
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{
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if (curdif<1)
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return i;
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bestdif = curdif;
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best = i;
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}
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}
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return best;
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}
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#define FindPalette(r,g,b) pal555to8[((r&0xF8)>>3)|((g&0xF8)<<2)|((b&0xF8)<<7)]
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qbyte GetPalette(int red, int green, int blue)
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{
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if (pal555to8) //fast precalculated method
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return FindPalette(red,green,blue);
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else //slow, horrible method.
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return FindIndexFromRGB(red, green, blue);
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}
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void MakeVideoPalette(void)
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{
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FILE *f;
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int r, g, b;
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// allocate memory
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if (!pal555to8)
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pal555to8 = BZ_Malloc(PAL555_SIZE);
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// pal555to8 = Hunk_AllocName(PAL555_SIZE, "RGB data");
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// load in previously created table
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COM_FOpenFile ("pal555.pal", &f);
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if (f)
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{
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fread(pal555to8, 1, PAL555_SIZE, f); //cached
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fclose(f);
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return;
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}
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// create palette conversion table
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for (b = 0; b < 32; b++)
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for (g = 0; g < 32; g++)
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for (r = 0; r < 32; r++)
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pal555to8[r | (g << 5) | (b << 10)] =
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FindIndexFromRGB(r<<3|r>>2, g<<3|g>>2, b<<3|b>>2);
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// write palette conversion table
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if (r_palconvwrite.value)
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COM_WriteFile("pal555.pal", pal555to8, PAL555_SIZE);
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}
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void MakeSwizzledPalette(void)
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{
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int idx, lvl;
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qbyte *pa;
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// create swizzled palettes
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for (lvl = 0; lvl < TRANS_LEVELS; lvl++)
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{
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pa = host_basepal;
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for (idx = 0; idx < 256; idx++)
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{
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// create a b10r10g10 table for each alpha level
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// may need some hacking due to the tendancy of
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// identity merges becoming darker
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swzpal[lvl][idx] = ( (pa[0] * lvl) >> 4 ) << 10; // red
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swzpal[lvl][idx] |= ( (pa[1] * lvl) >> 4 ); // green
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swzpal[lvl][idx] |= ( (pa[2] * lvl) >> 4 ) << 20; // blue
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swzpal[lvl][idx] = swzpal[lvl][idx] & 0x3feffbff;
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pa += 3;
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}
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}
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}
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void MediaSW_ShowFrame8bit(qbyte *framedata, int inwidth, int inheight, qbyte *palette)
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{
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int y, x;
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D_EnableBackBufferAccess (); // of all overlay stuff if drawing directly
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if (r_pixbytes == 1)
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{
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qbyte *dest, *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (vid.conheight - lines + y)*inheight/vid.conheight;
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src = framedata + v*inwidth;
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{
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f = 0;
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fstep = (inwidth<<16)/vid.conwidth;
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for (x=0 ; x<vid.conwidth ; x+=4)
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{
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dest[x] = FindPalette(palette[src[(f>>16)]*3], palette[src[(f>>16)]*3+1], palette[src[(f>>16)]*3+2]);
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f += fstep;
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dest[x+1] = FindPalette(palette[src[(f>>16)]*3], palette[src[(f>>16)]*3+1], palette[src[(f>>16)]*3+2]);
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f += fstep;
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dest[x+2] = FindPalette(palette[src[(f>>16)]*3], palette[src[(f>>16)]*3+1], palette[src[(f>>16)]*3+2]);
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f += fstep;
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dest[x+3] = FindPalette(palette[src[(f>>16)]*3], palette[src[(f>>16)]*3+1], palette[src[(f>>16)]*3+2]);
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f += fstep;
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}
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}
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}
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}
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else if (r_pixbytes == 2)
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{
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/* this still expects 32bit input
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extern int redbits, redshift;
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extern int greenbits, greenshift;
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extern int bluebits, blueshift;
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unsigned short *dest;
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qbyte *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = (unsigned short *)vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (vid.conheight - lines + y)*inheight/vid.conheight;
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src = framedata + v*inwidth*4;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth; x++) //sw 32 bit rendering is bgrx
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{
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dest[x] = (((src[(f>>16)*4]*(1<<redbits))/256)<<redshift) + (((src[(f>>16)*4+1]*(1<<greenbits))/256)<<greenshift) + (((src[(f>>16)*4+2]*(1<<bluebits))/256)<<blueshift);
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f += fstep;
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}
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}
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}
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*/
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}
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else if (r_pixbytes == 4)
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{
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qbyte *dest, *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes*4)
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{
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v = (vid.conheight - lines + y)*inheight/vid.conheight;
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src = framedata + v*inwidth;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth*4 ; x+=4) //sw 32 bit rendering is bgrx
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{
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dest[x] = palette[src[(f>>16)]*3+2];
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dest[x+1] = palette[src[(f>>16)]*3+1];
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dest[x+2] = palette[src[(f>>16)]*3];
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f += fstep;
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}
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}
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}
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}
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else
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Sys_Error("24 bit rendering?");
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D_DisableBackBufferAccess (); // for adapters that can't stay mapped in
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SCR_SetUpToDrawConsole();
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if (scr_con_current)
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SCR_DrawConsole (false);
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M_Draw(0);
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}
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void MediaSW_ShowFrameRGBA_32(qbyte *framedata, int inwidth, int inheight) //top down
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{
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int y, x;
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D_EnableBackBufferAccess (); // of all overlay stuff if drawing directly
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if (r_pixbytes == 1)
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{
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qbyte *dest, *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (vid.conheight - lines + y)*inheight/vid.conheight;
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src = framedata + v*inwidth*4;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth ; x+=4)
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{
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dest[x] = FindPalette(src[(f>>16)*4], src[(f>>16)*4+1], src[(f>>16)*4+2]);
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f += fstep;
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dest[x+1] = FindPalette(src[(f>>16)*4], src[(f>>16)*4+1], src[(f>>16)*4+2]);
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f += fstep;
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dest[x+2] = FindPalette(src[(f>>16)*4], src[(f>>16)*4+1], src[(f>>16)*4+2]);
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f += fstep;
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dest[x+3] = FindPalette(src[(f>>16)*4], src[(f>>16)*4+1], src[(f>>16)*4+2]);
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f += fstep;
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}
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}
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}
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}
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else if (r_pixbytes == 2)
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{
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extern int redbits, redshift;
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extern int greenbits, greenshift;
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extern int bluebits, blueshift;
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unsigned short *dest;
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qbyte *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = (unsigned short *)vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (vid.conheight - lines + y)*inheight/vid.conheight;
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src = framedata + v*inwidth*4;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth; x++) //sw 32 bit rendering is bgrx
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{
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dest[x] = (((src[(f>>16)*4]*(1<<redbits))/256)<<redshift) + (((src[(f>>16)*4+1]*(1<<greenbits))/256)<<greenshift) + (((src[(f>>16)*4+2]*(1<<bluebits))/256)<<blueshift);
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f += fstep;
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}
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}
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}
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}
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else if (r_pixbytes == 4)
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{
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qbyte *dest, *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes*4)
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{
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v = (vid.conheight - lines + y)*inheight/vid.conheight;
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src = framedata + v*inwidth*4;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth*4 ; x+=4) //sw 32 bit rendering is bgrx
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{
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dest[x] = src[(f>>16)*4+2];
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dest[x+1] = src[(f>>16)*4+1];
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dest[x+2] = src[(f>>16)*4];
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f += fstep;
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}
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}
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}
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}
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else
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Sys_Error("24 bit rendering?");
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D_DisableBackBufferAccess (); // for adapters that can't stay mapped in
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SCR_SetUpToDrawConsole();
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if (scr_con_current)
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SCR_DrawConsole (false);
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}
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void MediaSW_ShowFrameBGR_24_Flip(qbyte *framedata, int inwidth, int inheight) //input is bottom up...
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{
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int y, x;
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D_EnableBackBufferAccess (); // of all overlay stuff if drawing directly
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if (r_pixbytes == 1)
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{
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qbyte *dest, *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (lines - y)*inheight/vid.conheight;
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src = framedata + v*inwidth*3;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth ; x+=4)
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{
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dest[x] = FindPalette(src[(f>>16)*3+2], src[(f>>16)*3+1], src[(f>>16)*3]);
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f += fstep;
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dest[x+1] = FindPalette(src[(f>>16)*3+2], src[(f>>16)*3+1], src[(f>>16)*3]);
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f += fstep;
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dest[x+2] = FindPalette(src[(f>>16)*3+2], src[(f>>16)*3+1], src[(f>>16)*3]);
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f += fstep;
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dest[x+3] = FindPalette(src[(f>>16)*3+2], src[(f>>16)*3+1], src[(f>>16)*3]);
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f += fstep;
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}
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}
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}
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}
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else if (r_pixbytes == 2)
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{
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extern int redbits, redshift;
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extern int greenbits, greenshift;
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extern int bluebits, blueshift;
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unsigned short *dest;
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qbyte *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = (unsigned short *)vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (lines - y)*inheight/vid.conheight;
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src = framedata + v*inwidth*3;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth; x++) //sw 32 bit rendering is bgrx
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{
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dest[x] = (((src[(f>>16)*3+2]*(1<<redbits))/256)<<redshift) + (((src[(f>>16)*3+1]*(1<<greenbits))/256)<<greenshift) + (((src[(f>>16)*3+0]*(1<<bluebits))/256)<<blueshift);
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f += fstep;
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}
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}
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}
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}
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else if (r_pixbytes == 4)
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{
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unsigned int *dest;
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qbyte *src;
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int lines=vid.conheight;
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int v;
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int f, fstep;
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dest = (unsigned int *)vid.conbuffer;
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for (y=0 ; y<lines ; y++, dest += vid.conrowbytes)
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{
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v = (lines - y)*inheight/vid.conheight;
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src = framedata + v*inwidth*3;
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{
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f = 0;
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fstep = ((inwidth)*0x10000)/vid.conwidth;
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for (x=0 ; x<vid.conwidth ; x++) //sw 32 bit rendering is bgrx
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{
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*(dest+x) = *(int *)(src + (f>>16)*3);
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f += fstep;
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}
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}
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}
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}
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else
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Sys_Error("24 bit rendering?");
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D_DisableBackBufferAccess (); // for adapters that can't stay mapped in
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SCR_SetUpToDrawConsole();
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if (scr_con_current)
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SCR_DrawConsole (false);
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}
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