517 lines
14 KiB
C
517 lines
14 KiB
C
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//////////////////////////////////////////////////////////////////////////////
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//
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// DITH666.C - full color dither (to a palette with 6 red, 6 green 6 blue
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// levels)
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//
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// NOTE this file contains the 'C' code and DITH666A.ASM has the ASM code.
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//
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// This file does the following dithering
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//
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// 32bpp -> 8bpp
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// 24bpp -> 8bpp
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// 16bpp -> 8bpp
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//
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// 8bpp -> 4bpp N/I
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// 16bpp -> 4bpp N/I
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// 24bpp -> 4bpp N/I
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// 32bpp -> 4bpp N/I
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//
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//////////////////////////////////////////////////////////////////////////////
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#include <windows.h>
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#include <windowsx.h>
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#include "drawdibi.h"
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#include "dither.h"
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#if defined(WIN32) || defined(WANT_286) // 'C' code for Win32
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#define USE_C
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#endif
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#include "dith666.h"
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int giDitherTableUsage = 0;
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LPVOID glpDitherTable;
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static void Get666Colors(LPBITMAPINFOHEADER lpbi);
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//////////////////////////////////////////////////////////////////////////////
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//
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//
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//////////////////////////////////////////////////////////////////////////////
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void FAR PASCAL Dither16(LPBITMAPINFOHEADER,LPVOID,int,int,int,int,LPBITMAPINFOHEADER,LPVOID,int,int,LPVOID);
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void FAR PASCAL Dither24(LPBITMAPINFOHEADER,LPVOID,int,int,int,int,LPBITMAPINFOHEADER,LPVOID,int,int,LPVOID);
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void FAR PASCAL Dither32(LPBITMAPINFOHEADER,LPVOID,int,int,int,int,LPBITMAPINFOHEADER,LPVOID,int,int,LPVOID);
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//////////////////////////////////////////////////////////////////////////////
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//
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// DitherTableInit()
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//
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//////////////////////////////////////////////////////////////////////////////
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static LPVOID DitherTableInit()
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{
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#ifdef DEBUG
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DWORD time = timeGetTime();
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#endif
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#ifdef XDEBUG
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int X,Y;
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char aBuffer[100];
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char far *pBuffer = aBuffer;
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GetProfileString("DrawDib", "Matrix5", "", aBuffer, sizeof(aBuffer));
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if (aBuffer[0])
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{
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for(Y = 0;Y < 4;Y++)
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{
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for(X = 0;X < 4;X++)
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{
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while(!isdigit(*pBuffer))
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{
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pBuffer++;
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}
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aHalftone4x4_5[X][Y] = *pBuffer - '0';
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pBuffer++;
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}
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}
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}
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#endif
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if (aHalftone8[0][0][0][0] == (BYTE)-1)
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{
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int i,x,y;
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for (x=0; x<4; x++)
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for (y=0; y<4; y++)
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for (i=0; i<256; i++)
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aHalftone8[0][x][y][i] = (i/51 + (i%51 > aHalftone4x4[x][y]));
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for (x=0; x<4; x++)
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for (y=0; y<4; y++)
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for (i=0; i<256; i++)
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aHalftone8[1][x][y][i] = 6 * (i/51 + (i%51 > aHalftone4x4[x][y]));
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for (x=0; x<4; x++)
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for (y=0; y<4; y++)
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for (i=0; i<256; i++)
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aHalftone8[2][x][y][i] = 36 * (i/51 + (i%51 > aHalftone4x4[x][y]));
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}
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#ifdef USE_C
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if (aHalftone5[0][0][0][0] == (BYTE)-1)
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{
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int i,x,y,z,n;
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for (x=0; x<4; x++)
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for (y=0; y<4; y++)
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for (z=0; z<256; z++) {
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n = (z >> 2) & 0x1F;
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i = n > 0 ? n-1 : 0;
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aHalftone5[0][x][y][z] = (i/6 + (i%6 > aHalftone4x4_5[x][y]));
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}
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for (x=0; x<4; x++)
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for (y=0; y<4; y++)
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for (z=0; z<256; z++) {
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n = (z & 0x1F);
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i = n > 0 ? n-1 : 0;
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aHalftone5[1][x][y][z] = 6 * (i/6 + (i%6 > aHalftone4x4_5[x][y]));
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}
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for (x=0; x<4; x++)
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for (y=0; y<4; y++)
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for (z=0; z<256; z++) {
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n = z & 0x1F;
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i = n > 0 ? n-1 : 0;
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aHalftone5[2][x][y][z] = 36 * (i/6 + (i%6 > aHalftone4x4_5[x][y]));
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}
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}
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#endif
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DPF(("DitherTableInit() took %ldms", timeGetTime() - time));
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return NULL;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// DitherInit()
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR PASCAL Dither8Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable)
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{
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UINT x,y,i,r,g,b;
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BYTE FAR *pb;
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Get666Colors(lpbiOut);
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DitherTableInit();
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if (lpDitherTable == NULL)
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lpDitherTable = GlobalAllocPtr(GHND, 256*8*8);
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if (lpDitherTable == NULL)
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return (LPVOID)-1;
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pb = (LPBYTE)lpDitherTable;
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for (y=0; y<8; y++)
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{
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for (i=0; i<256; i++)
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{
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r = ((LPRGBQUAD)(lpbi+1))[i].rgbRed;
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g = ((LPRGBQUAD)(lpbi+1))[i].rgbGreen;
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b = ((LPRGBQUAD)(lpbi+1))[i].rgbBlue;
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for (x=0; x<8; x++)
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{
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*pb++ = DITH8(x,y,r,g,b);
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}
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}
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}
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*lpDitherProc = Dither8;
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return lpDitherTable;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// DitherInit()
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR PASCAL Dither16Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable)
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{
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Get666Colors(lpbiOut);
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*lpDitherProc = Dither16;
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DitherTableInit();
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#ifndef USE_C
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//
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// we dont need to re-init the dither table, unless it is not ours then
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// we should free it.
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//
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if (lpDitherTable && lpDitherTable != glpDitherTable)
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{
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DitherTerm(lpDitherTable);
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lpDitherTable = NULL;
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}
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//
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// we dont need to re-init table
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//
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if (lpDitherTable != NULL)
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return lpDitherTable;
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if (glpDitherTable)
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{
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giDitherTableUsage++;
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return glpDitherTable;
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}
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else
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{
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//
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// build a table that maps a RGB555 directly to a palette index
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// we actualy build 4 tables, we assume a 2x2 dither and build
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// a table for each position in the matrix.
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//
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UINT x,y,r,g,b;
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BYTE FAR *pb;
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#ifdef DEBUG
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DWORD time = timeGetTime();
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#endif
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lpDitherTable = GlobalAllocPtr(GMEM_MOVEABLE|GMEM_SHARE, 32768l*4);
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if (lpDitherTable == NULL)
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return (LPVOID)-1;
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glpDitherTable = lpDitherTable;
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giDitherTableUsage = 1;
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for (y=0; y<2; y++)
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{
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if (y == 0)
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pb = (BYTE FAR *)lpDitherTable;
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else
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pb = (BYTE FAR *)((BYTE _huge *)lpDitherTable + 65536);
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for (r=0; r<32; r++)
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for (g=0; g<32; g++)
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for (b=0; b<32; b++)
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for (x=0; x<2; x++)
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*pb++ = DITH31(x,y,r,g,b);
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}
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DPF(("Dither16Init() took %ldms", timeGetTime() - time));
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}
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#endif
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return lpDitherTable;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// DitherTerm()
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//
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//////////////////////////////////////////////////////////////////////////////
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void FAR PASCAL Dither16Term(LPVOID lpDitherTable)
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{
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if (giDitherTableUsage == 0 || --giDitherTableUsage > 0)
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return;
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if (glpDitherTable)
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{
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GlobalFreePtr(glpDitherTable);
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glpDitherTable = NULL;
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// Dither24Init()
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR PASCAL Dither24Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable)
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{
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Get666Colors(lpbiOut);
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*lpDitherProc = Dither24;
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return DitherTableInit();
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// Dither24Term()
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//
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//////////////////////////////////////////////////////////////////////////////
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void FAR PASCAL Dither24Term(LPVOID lpDitherTable)
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{
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// Dither32Init()
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//
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//////////////////////////////////////////////////////////////////////////////
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LPVOID FAR PASCAL Dither32Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable)
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{
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Get666Colors(lpbiOut);
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*lpDitherProc = Dither32;
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return DitherTableInit();
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// Dither32Term()
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//
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//////////////////////////////////////////////////////////////////////////////
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void FAR PASCAL Dither32Term(LPVOID lpDitherTable)
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{
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// GetDithColors() get the dither palette
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//
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//////////////////////////////////////////////////////////////////////////////
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static void Get666Colors(LPBITMAPINFOHEADER lpbi)
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{
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RGBQUAD FAR *prgb = (RGBQUAD FAR *)(((LPBYTE)lpbi) + (UINT)lpbi->biSize);
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int i;
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for (i=0; i<256; i++)
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{
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prgb[i].rgbRed = pal666[i][0];
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prgb[i].rgbGreen = pal666[i][1];
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prgb[i].rgbBlue = pal666[i][2];
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prgb[i].rgbReserved = 0;
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}
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lpbi->biClrUsed = 256;
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}
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#ifdef USE_C
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//////////////////////////////////////////////////////////////////////////////
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//
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// Dither24 - dither from 24 to 8 using the Table method in 'C' Code
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//
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//////////////////////////////////////////////////////////////////////////////
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void FAR PASCAL Dither24(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable) // dither table.
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{
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int x,y;
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BYTE r,g,b;
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UINT wWidthSrc;
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UINT wWidthDst;
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BYTE _huge *pbS;
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BYTE _huge *pbD;
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if (biDst->biBitCount != 8 || biSrc->biBitCount != 24)
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return;
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wWidthSrc = ((UINT)biSrc->biWidth*3+3)&~3;
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wWidthDst = ((UINT)biDst->biWidth+3)&~3;
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pbD = (BYTE _huge *)lpDst + DstX + (DWORD)(UINT)DstY * (DWORD)wWidthDst;
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pbS = (BYTE _huge *)lpSrc + SrcX*3 + (DWORD)(UINT)SrcY * (DWORD)wWidthSrc;
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wWidthSrc -= DstXE*3;
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wWidthDst -= DstXE;
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#define GET24() \
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b = *pbS++; \
|
||
|
|
g = *pbS++; \
|
||
|
|
r = *pbS++;
|
||
|
|
|
||
|
|
for (y=0; y<DstYE; y++) {
|
||
|
|
|
||
|
|
for (x=0; x<DstXE; x++) {
|
||
|
|
GET24(); *pbD++ = DITH8(x,y,r,g,b);
|
||
|
|
}
|
||
|
|
|
||
|
|
pbS += wWidthSrc;
|
||
|
|
pbD += wWidthDst;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// Dither32 - dither from 32 to 8 using the Table method in 'C' Code
|
||
|
|
//
|
||
|
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
void FAR PASCAL Dither32(
|
||
|
|
LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
|
||
|
|
LPVOID lpDst, // --> to destination bits
|
||
|
|
int DstX, // Destination origin - x coordinate
|
||
|
|
int DstY, // Destination origin - y coordinate
|
||
|
|
int DstXE, // x extent of the BLT
|
||
|
|
int DstYE, // y extent of the BLT
|
||
|
|
LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
|
||
|
|
LPVOID lpSrc, // --> to source bits
|
||
|
|
int SrcX, // Source origin - x coordinate
|
||
|
|
int SrcY, // Source origin - y coordinate
|
||
|
|
LPVOID lpDitherTable) // dither table.
|
||
|
|
{
|
||
|
|
int x,y;
|
||
|
|
BYTE r,g,b;
|
||
|
|
UINT wWidthSrc;
|
||
|
|
UINT wWidthDst;
|
||
|
|
BYTE _huge *pbS;
|
||
|
|
BYTE _huge *pbD;
|
||
|
|
|
||
|
|
if (biDst->biBitCount != 8 || biSrc->biBitCount != 32)
|
||
|
|
return;
|
||
|
|
|
||
|
|
wWidthSrc = ((UINT)biSrc->biWidth*4+3)&~3;
|
||
|
|
wWidthDst = ((UINT)biDst->biWidth+3)&~3;
|
||
|
|
|
||
|
|
pbD = (BYTE _huge *)lpDst + DstX + (DWORD)(UINT)DstY * (DWORD)wWidthDst;
|
||
|
|
pbS = (BYTE _huge *)lpSrc + SrcX*4 + (DWORD)(UINT)SrcY * (DWORD)wWidthSrc;
|
||
|
|
|
||
|
|
wWidthSrc -= DstXE*4;
|
||
|
|
wWidthDst -= DstXE;
|
||
|
|
|
||
|
|
#define GET32() \
|
||
|
|
b = *pbS++; \
|
||
|
|
g = *pbS++; \
|
||
|
|
r = *pbS++; \
|
||
|
|
pbS++;
|
||
|
|
|
||
|
|
for (y=0; y<DstYE; y++) {
|
||
|
|
|
||
|
|
for (x=0; x<DstXE; x++)
|
||
|
|
{
|
||
|
|
GET32();
|
||
|
|
*pbD++ = DITH8(x,y,r,g,b);
|
||
|
|
}
|
||
|
|
|
||
|
|
pbS += wWidthSrc;
|
||
|
|
pbD += wWidthDst;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
|
//
|
||
|
|
// Dither16 - dither from 16 to 8 using the Table method in 'C' Code
|
||
|
|
//
|
||
|
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
void FAR PASCAL Dither16(
|
||
|
|
LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
|
||
|
|
LPVOID lpDst, // --> to destination bits
|
||
|
|
int DstX, // Destination origin - x coordinate
|
||
|
|
int DstY, // Destination origin - y coordinate
|
||
|
|
int DstXE, // x extent of the BLT
|
||
|
|
int DstYE, // y extent of the BLT
|
||
|
|
LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
|
||
|
|
LPVOID lpSrc, // --> to source bits
|
||
|
|
int SrcX, // Source origin - x coordinate
|
||
|
|
int SrcY, // Source origin - y coordinate
|
||
|
|
LPVOID lpDitherTable) // dither table.
|
||
|
|
{
|
||
|
|
int x,y;
|
||
|
|
WORD w;
|
||
|
|
UINT wWidthSrc;
|
||
|
|
UINT wWidthDst;
|
||
|
|
BYTE _huge *pbS;
|
||
|
|
BYTE _huge *pbD;
|
||
|
|
|
||
|
|
if (biDst->biBitCount != 8 || biSrc->biBitCount != 16)
|
||
|
|
return;
|
||
|
|
|
||
|
|
wWidthSrc = ((UINT)biSrc->biWidth*2+3)&~3;
|
||
|
|
wWidthDst = ((UINT)biDst->biWidth+3)&~3;
|
||
|
|
|
||
|
|
pbD = (BYTE _huge *)lpDst + DstX + (DWORD)(UINT)DstY * (DWORD)wWidthDst;
|
||
|
|
pbS = (BYTE _huge *)lpSrc + SrcX*2 + (DWORD)(UINT)SrcY * (DWORD)wWidthSrc;
|
||
|
|
|
||
|
|
wWidthSrc -= DstXE*2;
|
||
|
|
wWidthDst -= DstXE;
|
||
|
|
|
||
|
|
#define GET16() \
|
||
|
|
w = *((WORD _huge *)pbS)++;
|
||
|
|
|
||
|
|
for (y=0; y<DstYE; y++) {
|
||
|
|
|
||
|
|
for (x=0; x<DstXE; x++)
|
||
|
|
{
|
||
|
|
GET16();
|
||
|
|
*pbD++ = DITH5(x,y,w);
|
||
|
|
}
|
||
|
|
|
||
|
|
pbS += wWidthSrc;
|
||
|
|
pbD += wWidthDst;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|