mirror of
https://github.com/jmarshall23/Hellfire.git
synced 2026-08-12 07:50:53 +02:00
Justin Marshall
1138 lines
33 KiB
C++
1138 lines
33 KiB
C++
/****************************************************************************
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*
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* SBMP.CPP
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* Storm bitmap functions
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*
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* By Michael O'Brien (2/8/96)
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*
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***/
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#include "pch.h"
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#pragma hdrstop
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#define BMPSIGNATURE 0x4D42
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#define PCXSIGNATURE 0x050A
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/****************************************************************************
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*
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* BMP ENCODER/DECODER
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*
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***/
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static void FlipImage (LPBYTE dest,
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LPBYTE source,
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DWORD destbytes,
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int destwidth,
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int sourcewidth,
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int height);
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//===========================================================================
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static BOOL DecodeBmpFile (HSFILE file,
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LPPALETTEENTRY paletteentries,
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LPBYTE bitmapbits,
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DWORD buffersize,
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int *width,
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int *height,
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int *bitdepth) {
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// READ THE FILE HEADER
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BITMAPFILEHEADER fileheader;
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if (!SFileReadFile(file,&fileheader,sizeof(BITMAPFILEHEADER)))
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return FALSE;
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// READ THE BITMAP INFO HEADER
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BITMAPINFOHEADER infoheader;
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if (!SFileReadFile(file,&infoheader,sizeof(BITMAPINFOHEADER)))
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return FALSE;
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if (width)
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*width = infoheader.biWidth;
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if (height)
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*height = infoheader.biHeight;
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if (bitdepth)
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*bitdepth = infoheader.biBitCount;
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// READ THE PALETTE ENTRIES
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if (infoheader.biBitCount > 8)
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paletteentries = NULL;
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if (paletteentries) {
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RGBQUAD palettedata[256];
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if (!SFileReadFile(file,palettedata,256*sizeof(RGBQUAD)))
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return FALSE;
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// CONVERT FROM RGBQUAD TO PALETTEENTRY FORMAT
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for (int loop = 0; loop < 256; ++loop) {
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(paletteentries+loop)->peRed = palettedata[loop].rgbRed;
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(paletteentries+loop)->peGreen = palettedata[loop].rgbGreen;
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(paletteentries+loop)->peBlue = palettedata[loop].rgbBlue;
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(paletteentries+loop)->peFlags = 0;
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}
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}
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// READ THE BITMAP BITS
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if (bitmapbits) {
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SFileSetFilePointer(file,
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fileheader.bfOffBits
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-sizeof(BITMAPFILEHEADER)
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-sizeof(BITMAPINFOHEADER)
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-(paletteentries ? 256*sizeof(RGBQUAD) : 0),
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NULL,
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FILE_CURRENT);
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DWORD bytesread = 0;
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{
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LPBYTE temp = (LPBYTE)ALLOC(infoheader.biSizeImage);
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SFileReadFile(file,temp,infoheader.biSizeImage,&bytesread);
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int destwidth = (infoheader.biWidth*infoheader.biBitCount) >> 3;
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int sourcewidth = destwidth;
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if (sourcewidth & 3)
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sourcewidth += 4-(sourcewidth & 3);
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FlipImage(bitmapbits,
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temp,
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buffersize,
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destwidth,
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sourcewidth,
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infoheader.biHeight);
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FREE(temp);
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}
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if (bytesread < infoheader.biSizeImage)
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return FALSE;
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}
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return TRUE;
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}
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//===========================================================================
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static BOOL DecodeBmpMem (LPBYTE imagedata,
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DWORD imagebytes,
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LPPALETTEENTRY paletteentries,
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LPBYTE bitmapbits,
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DWORD buffersize,
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int *width,
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int *height,
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int *bitdepth) {
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// PROCESS THE HEADERS
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LPBITMAPFILEHEADER fileheader = (LPBITMAPFILEHEADER)imagedata;
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LPBITMAPINFOHEADER infoheader = (LPBITMAPINFOHEADER)(fileheader+1);
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if (width)
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*width = infoheader->biWidth;
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if (height)
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*height = infoheader->biHeight;
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if (bitdepth)
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*bitdepth = infoheader->biBitCount;
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// PROCESS THE PALETTE ENTRIES
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if (infoheader->biBitCount > 8)
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paletteentries = NULL;
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if (paletteentries) {
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RGBQUAD *palettedata = (RGBQUAD *)(infoheader+1);
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for (int loop = 0; loop < 256; ++loop) {
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(paletteentries+loop)->peRed = (palettedata+loop)->rgbRed;
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(paletteentries+loop)->peGreen = (palettedata+loop)->rgbGreen;
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(paletteentries+loop)->peBlue = (palettedata+loop)->rgbBlue;
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(paletteentries+loop)->peFlags = 0;
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}
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}
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// PROCESS THE BITMAP BITS
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if (bitmapbits) {
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DWORD offset = fileheader->bfOffBits
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-sizeof(BITMAPFILEHEADER)
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-sizeof(BITMAPINFOHEADER)
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-(paletteentries ? 256*sizeof(RGBQUAD) : 0);
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int destwidth = (infoheader->biWidth*infoheader->biBitCount) >> 3;
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int sourcewidth = destwidth;
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if (sourcewidth & 3)
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sourcewidth += 4-(sourcewidth & 3);
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FlipImage(bitmapbits,
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imagedata+offset,
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buffersize,
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destwidth,
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sourcewidth,
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infoheader->biHeight);
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}
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return TRUE;
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}
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//===========================================================================
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static BOOL EncodeBmp256File (HANDLE file,
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LPPALETTEENTRY paletteentries,
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LPBYTE bitmapbits,
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int width,
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int height) {
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// WRITE THE FILE HEADER
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{
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BITMAPFILEHEADER fileheader;
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ZeroMemory(&fileheader,sizeof(BITMAPFILEHEADER));
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fileheader.bfType = BMPSIGNATURE;
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fileheader.bfOffBits = sizeof(BITMAPFILEHEADER)
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+sizeof(BITMAPINFOHEADER)
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+256*sizeof(RGBQUAD);
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fileheader.bfSize = fileheader.bfOffBits+width*height;
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DWORD byteswritten;
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WriteFile(file,&fileheader,sizeof(BITMAPFILEHEADER),&byteswritten,NULL);
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}
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// WRITE THE BITMAP INFO HEADER
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{
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BITMAPINFOHEADER infoheader;
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ZeroMemory(&infoheader,sizeof(BITMAPINFOHEADER));
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infoheader.biSize = sizeof(BITMAPINFOHEADER);
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infoheader.biWidth = width;
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infoheader.biHeight = height;
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infoheader.biPlanes = 1;
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infoheader.biBitCount = 8;
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infoheader.biCompression = BI_RGB;
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infoheader.biSizeImage = width*height;
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infoheader.biClrUsed = 256;
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infoheader.biClrImportant = 256;
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DWORD byteswritten;
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WriteFile(file,&infoheader,sizeof(BITMAPINFOHEADER),&byteswritten,NULL);
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}
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// WRITE THE PALETTE ENTRIES
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{
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RGBQUAD palettedata[256];
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for (int loop = 0; loop < 256; ++loop) {
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palettedata[loop].rgbRed = (paletteentries+loop)->peRed;
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palettedata[loop].rgbGreen = (paletteentries+loop)->peGreen;
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palettedata[loop].rgbBlue = (paletteentries+loop)->peBlue;
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palettedata[loop].rgbReserved = 0;
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}
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DWORD byteswritten;
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WriteFile(file,palettedata,256*sizeof(RGBQUAD),&byteswritten,NULL);
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}
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// WRITE THE BITMAP BITS
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{
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DWORD byteswritten;
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int destwidth = width;
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if (destwidth & 3)
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destwidth += 4-(destwidth & 3);
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LPBYTE temp = (LPBYTE)ALLOC(destwidth*height);
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FlipImage(temp,
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bitmapbits,
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destwidth*height,
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destwidth,
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width,
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height);
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WriteFile(file,temp,destwidth*height,&byteswritten,NULL);
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FREE(temp);
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}
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return TRUE;
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}
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//===========================================================================
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static void FlipImage (LPBYTE dest,
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LPBYTE source,
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DWORD destbytes,
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int destwidth,
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int sourcewidth,
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int height) {
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VALIDATEBEGIN;
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VALIDATE(dest);
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VALIDATE(source);
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VALIDATE(destbytes);
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VALIDATE(destwidth);
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VALIDATE(sourcewidth);
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VALIDATE(height);
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VALIDATEENDVOID;
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source += (height-1)*sourcewidth;
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LPBYTE destterm = dest+destbytes;
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while (height--) {
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DWORD bytestocopy = min(destwidth,destterm-dest);
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if (!bytestocopy)
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break;
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CopyMemory(dest,source,bytestocopy);
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dest += bytestocopy;
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source -= sourcewidth;
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}
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}
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/****************************************************************************
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*
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* GIF ENCODER/DECODER
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*
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***/
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typedef struct _GIFCOMPRESSREC {
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int bits;
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int max_code;
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int init_bits;
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int cur_accum;
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int cur_bits;
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int waiting_code;
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BOOL first_byte;
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int clearcode;
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int EOFcode;
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int freecode;
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int *hash_code;
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int *hash_value;
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int bytesinpkt;
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BYTE packetbuf[256];
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} GIFCOMPRESSREC;
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#pragma pack(1)
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typedef struct _GIFHEADERREC {
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char signature[6];
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WORD width;
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WORD height;
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BYTE flags;
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BYTE bgidx;
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BYTE reserved;
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} GIFHEADERREC;
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#pragma pack()
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typedef struct _GIFIMAGEDESCREC {
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WORD x;
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WORD y;
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WORD width;
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WORD height;
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BYTE flags;
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BYTE codesize;
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} GIFIMAGEDESCREC;
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typedef struct _GIFPALREC {
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struct {
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BYTE red;
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BYTE green;
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BYTE blue;
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} idx[256];
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} GIFPALREC;
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typedef struct _GIFMARKERREC {
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char ch;
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} GIFMARKERREC;
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#define HASH_ENTRY(prefix,suffix) ((((int) (prefix)) << 8) | (suffix))
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#define MAX_LZW_BITS 12 /* maximum LZW code size (4096 symbols) */
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#define LZW_TABLE_SIZE ((int) 1 << MAX_LZW_BITS)
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#define HSIZE 5003 /* hash table size for 80% occupancy */
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#define MAXCODE(bits) (((int) 1 << (bits)) - 1)
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static inline void Output (GIFCOMPRESSREC *compress,
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LPVOID *dest,
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int code);
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//===========================================================================
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static void ClearBlock (GIFCOMPRESSREC *compress,
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LPVOID *dest) {
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ZeroMemory(compress->hash_code,HSIZE*sizeof(int));
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compress->freecode = compress->clearcode + 2;
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Output(compress,
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dest,
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compress->clearcode);
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compress->bits = compress->init_bits; /* reset code size */
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compress->max_code = MAXCODE(compress->bits);
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}
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//===========================================================================
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static void FlushPacket (GIFCOMPRESSREC *compress,
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LPVOID *dest) {
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if (!compress->bytesinpkt)
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return;
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compress->packetbuf[0] = (BYTE)(compress->bytesinpkt++);
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CopyMemory(*dest,compress->packetbuf,compress->bytesinpkt);
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*dest = (LPBYTE)*dest + compress->bytesinpkt;
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compress->bytesinpkt = 0;
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}
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//===========================================================================
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static inline void Output (GIFCOMPRESSREC *compress,
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LPVOID *dest,
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int code) {
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compress->cur_accum |= code << compress->cur_bits;
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compress->cur_bits += compress->bits;
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while (compress->cur_bits >= 8) {
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compress->packetbuf[++compress->bytesinpkt] =
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(BYTE)(compress->cur_accum & 0xFF);
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if (compress->bytesinpkt >= 255)
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FlushPacket(compress,
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dest);
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compress->cur_accum >>= 8;
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compress->cur_bits -= 8;
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}
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/*
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* If the next entry is going to be too big for the code size,
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* then increase it, if possible. We do this here to ensure
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* that it's done in sync with the decoder's codesize increases.
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*/
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if (compress->freecode > compress->max_code) {
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compress->bits++;
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if (compress->bits == MAX_LZW_BITS)
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compress->max_code = LZW_TABLE_SIZE; /* freecode will never exceed this */
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else
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compress->max_code = MAXCODE(compress->bits);
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}
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}
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//===========================================================================
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static inline void CompressGifByte (GIFCOMPRESSREC *compress,
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LPVOID *dest,
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int val) {
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register int i;
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register int disp;
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register int probe_value;
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if (compress->first_byte) { /* need to initialize waiting_code */
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compress->waiting_code = val;
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compress->first_byte = FALSE;
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return;
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}
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/* Probe hash table to see if a symbol exists for
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* waiting_code followed by val.
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* If so, replace waiting_code by that symbol and return.
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*/
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i = ((int) val << (MAX_LZW_BITS-8)) + compress->waiting_code;
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/* i is less than twice 2**MAX_LZW_BITS, therefore less than twice HSIZE */
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if (i >= HSIZE)
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i -= HSIZE;
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probe_value = HASH_ENTRY(compress->waiting_code, val);
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if (compress->hash_code[i] != 0) { /* is first probed slot empty? */
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if (compress->hash_value[i] == probe_value) {
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compress->waiting_code = compress->hash_code[i];
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return;
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}
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if (i == 0) /* secondary hash (after G. Knott) */
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disp = 1;
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else
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disp = HSIZE - i;
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for (;;) {
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i -= disp;
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if (i < 0)
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i += HSIZE;
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if (compress->hash_code[i] == 0)
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break; /* hit empty slot */
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if (compress->hash_value[i] == probe_value) {
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compress->waiting_code = compress->hash_code[i];
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return;
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}
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}
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}
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/* here when hashtable[i] is an empty slot; desired symbol not in table */
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Output(compress,
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dest,
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compress->waiting_code);
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if (compress->freecode < LZW_TABLE_SIZE) {
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compress->hash_code[i] = compress->freecode++; /* add symbol to hashtable */
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compress->hash_value[i] = probe_value;
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} else
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ClearBlock(compress,
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dest);
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compress->waiting_code = val;
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}
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//===========================================================================
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static DWORD CompressGifImage (LPVOID dest,
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LPCVOID source,
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DWORD sourcebytes) {
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LPVOID basedest = dest;
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// INITIALIZE COMPRESSION
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GIFCOMPRESSREC compress;
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ZeroMemory(&compress,sizeof(GIFCOMPRESSREC));
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compress.bits = 9;
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compress.init_bits = 9;
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compress.max_code = MAXCODE(compress.bits);
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compress.clearcode = 1 << (compress.bits-1);
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compress.EOFcode = compress.clearcode+1;
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compress.freecode = compress.clearcode+2;
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compress.first_byte = TRUE;
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compress.hash_code = (int *)ALLOCZERO(HSIZE*sizeof(int));
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compress.hash_value = (int *)ALLOCZERO(HSIZE*sizeof(int));
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Output(&compress,
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&dest,
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compress.clearcode);
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// COMPRESS THE IMAGE
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while (sourcebytes--) {
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CompressGifByte(&compress,
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&dest,
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*(LPBYTE)source);
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source = (LPBYTE)source+1;
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}
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// CLEANUP
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if (!compress.first_byte)
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Output(&compress,
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&dest,
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compress.waiting_code);
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Output(&compress,
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&dest,
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compress.EOFcode);
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if (compress.cur_bits > 0)
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compress.packetbuf[++compress.bytesinpkt] =
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(BYTE)(compress.cur_accum & 0xFF);
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FlushPacket(&compress,
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&dest);
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FREE(compress.hash_code);
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FREE(compress.hash_value);
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return (LPBYTE)dest-(LPBYTE)basedest;
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}
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//===========================================================================
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static BOOL EncodeGif256File (HANDLE file,
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LPPALETTEENTRY paletteentries,
|
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LPBYTE bitmapbits,
|
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int width,
|
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int height) {
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// WRITE THE HEADER
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{
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GIFHEADERREC rec;
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rec.signature[0] = 'G';
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rec.signature[1] = 'I';
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rec.signature[2] = 'F';
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rec.signature[3] = '8';
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rec.signature[4] = '7';
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rec.signature[5] = 'a';
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rec.width = (WORD)width;
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rec.height = (WORD)height;
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rec.flags = 0x80 // global color table
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| 0x70 // 256 color image
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| 0x07; // 256 colors in global color table;
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rec.bgidx = 0;
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rec.reserved = 0;
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DWORD byteswritten;
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WriteFile(file,&rec,sizeof(GIFHEADERREC),&byteswritten,NULL);
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}
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// WRITE THE COLOR TABLE
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{
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GIFPALREC pal;
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for (int loop = 0; loop < 256; ++loop) {
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pal.idx[loop].red = (paletteentries+loop)->peRed;
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pal.idx[loop].green = (paletteentries+loop)->peGreen;
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pal.idx[loop].blue = (paletteentries+loop)->peBlue;
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}
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DWORD byteswritten;
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WriteFile(file,&pal,sizeof(GIFPALREC),&byteswritten,NULL);
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}
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|
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// WRITE THE SEPARATOR
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{
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GIFMARKERREC rec;
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rec.ch = ',';
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DWORD byteswritten;
|
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WriteFile(file,&rec,sizeof(GIFMARKERREC),&byteswritten,NULL);
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}
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|
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// WRITE THE IMAGE DESCRIPTOR
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{
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GIFIMAGEDESCREC rec;
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rec.x = 0;
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rec.y = 0;
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rec.width = (WORD)width;
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rec.height = (WORD)height;
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rec.flags = 0;
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rec.codesize = 8;
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DWORD byteswritten;
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WriteFile(file,&rec,sizeof(GIFIMAGEDESCREC),&byteswritten,NULL);
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}
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// WRITE THE BITMAP BITS
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|
{
|
|
LPBYTE compressed = (LPBYTE)ALLOC(width*height*2);
|
|
DWORD bytes = CompressGifImage(compressed,
|
|
bitmapbits,
|
|
width*height);
|
|
DWORD byteswritten;
|
|
WriteFile(file,compressed,bytes,&byteswritten,NULL);
|
|
FREE(compressed);
|
|
}
|
|
|
|
// WRITE THE TERMINATOR
|
|
{
|
|
GIFMARKERREC rec;
|
|
rec.ch = 0;
|
|
DWORD byteswritten;
|
|
WriteFile(file,&rec,sizeof(GIFMARKERREC),&byteswritten,NULL);
|
|
rec.ch = ';';
|
|
WriteFile(file,&rec,sizeof(GIFMARKERREC),&byteswritten,NULL);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
*
|
|
* PCX ENCODER/DECODER
|
|
*
|
|
***/
|
|
|
|
typedef struct _PCXHEADERREC {
|
|
WORD signature;
|
|
BYTE encoding;
|
|
BYTE bitsperpixel;
|
|
WORD x1;
|
|
WORD y1;
|
|
WORD x2;
|
|
WORD y2;
|
|
WORD screenwidth;
|
|
WORD screenheight;
|
|
} PCXHEADERREC;
|
|
|
|
typedef struct _PCXINFOREC {
|
|
BYTE mode;
|
|
BYTE planes;
|
|
WORD bytesperline;
|
|
BYTE unused[60];
|
|
} PCXINFOREC;
|
|
|
|
typedef struct _PCXRGBREC {
|
|
BYTE red;
|
|
BYTE green;
|
|
BYTE blue;
|
|
} PCXRGBREC;
|
|
|
|
typedef struct _PCXFILEREC {
|
|
PCXHEADERREC header;
|
|
PCXRGBREC pal16[16];
|
|
PCXINFOREC info;
|
|
} PCXFILEREC;
|
|
|
|
typedef struct _PCXEXTPALREC {
|
|
BYTE number;
|
|
PCXRGBREC pal256[256];
|
|
} PCXEXTPALREC;
|
|
|
|
static void UncompressPcxImage (LPBYTE dest,
|
|
LPBYTE source,
|
|
DWORD destbytes,
|
|
DWORD sourcebytes);
|
|
|
|
//===========================================================================
|
|
static void CompressPcxRow (LPBYTE *dest, LPBYTE *source, int width) {
|
|
do {
|
|
BYTE ch = *(*source)++;
|
|
int count = 1;
|
|
--width;
|
|
while (width && (ch == **source) && (count < 63)) {
|
|
++count;
|
|
--width;
|
|
++*source;
|
|
}
|
|
if ((count > 1) || (ch >= 0xC0)) {
|
|
count |= 0xC0;
|
|
*(*dest)++ = (BYTE)(count & 0xFF);
|
|
}
|
|
*(*dest)++ = ch;
|
|
} while (width);
|
|
}
|
|
|
|
//===========================================================================
|
|
static BOOL DecodePcxFile (HSFILE file,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE bitmapbits,
|
|
DWORD buffersize,
|
|
int *width,
|
|
int *height,
|
|
int *bitdepth) {
|
|
|
|
// READ THE HEADER
|
|
PCXFILEREC rec;
|
|
if (!SFileReadFile(file,&rec,sizeof(PCXFILEREC)))
|
|
return 0;
|
|
int imagewidth = rec.header.x2+1-rec.header.x1;
|
|
int imageheight = rec.header.y2+1-rec.header.y1;
|
|
int imagebitdepth = rec.header.bitsperpixel;
|
|
if (width)
|
|
*width = imagewidth;
|
|
if (height)
|
|
*height = imageheight;
|
|
if (bitdepth)
|
|
*bitdepth = imagebitdepth;
|
|
|
|
// READ THE BITMAP BITS
|
|
if (bitmapbits) {
|
|
DWORD bytestoread = SFileGetFileSize(file)-SFileSetFilePointer(file,0,NULL,FILE_CURRENT);
|
|
LPBYTE compressed = (LPBYTE)ALLOC(bytestoread);
|
|
SFileReadFile(file,compressed,bytestoread);
|
|
UncompressPcxImage(bitmapbits,
|
|
compressed,
|
|
buffersize,
|
|
bytestoread);
|
|
FREE(compressed);
|
|
}
|
|
else
|
|
SFileSetFilePointer(file,0,NULL,FILE_END);
|
|
|
|
// READ THE PALETTE ENTRIES
|
|
if (paletteentries && (imagebitdepth == 8)) {
|
|
PCXRGBREC paldata[256];
|
|
SFileSetFilePointer(file,-256*(int)sizeof(PCXRGBREC),NULL,FILE_CURRENT);
|
|
SFileReadFile(file,paldata,256*sizeof(PCXRGBREC));
|
|
|
|
// CONVERT FROM PCXRGBREC TO PALETTEENTRY FORMAT
|
|
for (int loop = 0; loop < 256; ++loop) {
|
|
(paletteentries+loop)->peRed = paldata[loop].red;
|
|
(paletteentries+loop)->peGreen = paldata[loop].green;
|
|
(paletteentries+loop)->peBlue = paldata[loop].blue;
|
|
(paletteentries+loop)->peFlags = 0;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
//===========================================================================
|
|
static BOOL DecodePcxMem (LPBYTE imagedata,
|
|
DWORD imagebytes,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE bitmapbits,
|
|
DWORD buffersize,
|
|
int *width,
|
|
int *height,
|
|
int *bitdepth) {
|
|
|
|
// PROCESS THE HEADER
|
|
PCXFILEREC *rec = (PCXFILEREC *)imagedata;
|
|
int imagewidth = rec->header.x2+1-rec->header.x1;
|
|
int imageheight = rec->header.y2+1-rec->header.y1;
|
|
int imagebitdepth = rec->header.bitsperpixel;
|
|
if (width)
|
|
*width = imagewidth;
|
|
if (height)
|
|
*height = imageheight;
|
|
if (bitdepth)
|
|
*bitdepth = imagebitdepth;
|
|
|
|
// PROCESS THE BITMAP BITS
|
|
if (bitmapbits)
|
|
UncompressPcxImage(bitmapbits,
|
|
(LPBYTE)(rec+1),
|
|
min(buffersize,(DWORD)(imagewidth*imageheight)),
|
|
imagebytes-sizeof(PCXFILEREC));
|
|
|
|
// PROCESS THE PALETTE ENTRIES
|
|
if (paletteentries && (imagebitdepth == 8)) {
|
|
PCXRGBREC *paldata = (PCXRGBREC *)(imagedata+imagebytes-256*sizeof(PCXRGBREC));
|
|
for (int loop = 0; loop < 256; ++loop) {
|
|
(paletteentries+loop)->peRed = (paldata+loop)->red;
|
|
(paletteentries+loop)->peGreen = (paldata+loop)->green;
|
|
(paletteentries+loop)->peBlue = (paldata+loop)->blue;
|
|
(paletteentries+loop)->peFlags = 0;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
//===========================================================================
|
|
static BOOL EncodePcx256File (HANDLE file,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE bitmapbits,
|
|
int width,
|
|
int height) {
|
|
|
|
// WRITE THE HEADER
|
|
{
|
|
PCXFILEREC rec;
|
|
ZeroMemory(&rec,sizeof(PCXFILEREC));
|
|
rec.header.signature = PCXSIGNATURE;
|
|
rec.header.encoding = 1;
|
|
rec.header.bitsperpixel = 8;
|
|
rec.header.x2 = width-1;
|
|
rec.header.y2 = height-1;
|
|
rec.header.screenwidth = width;
|
|
rec.header.screenheight = height;
|
|
rec.info.planes = 1;
|
|
rec.info.bytesperline = width;
|
|
DWORD byteswritten;
|
|
WriteFile(file,&rec,sizeof(PCXFILEREC),&byteswritten,NULL);
|
|
}
|
|
|
|
// WRITE THE BITMAP BITS
|
|
{
|
|
LPBYTE compressed = (LPBYTE)ALLOC(width*height*2);
|
|
LPBYTE source = bitmapbits;
|
|
LPBYTE dest = compressed;
|
|
for (int loop = 0; loop < height; ++loop)
|
|
CompressPcxRow(&dest,&source,width);
|
|
DWORD byteswritten;
|
|
WriteFile(file,compressed,dest-compressed,&byteswritten,NULL);
|
|
FREE(compressed);
|
|
}
|
|
|
|
// WRITE THE PALETTE ENTRIES
|
|
{
|
|
PCXEXTPALREC pal;
|
|
pal.number = 12;
|
|
for (int loop = 0; loop < 256; ++loop) {
|
|
pal.pal256[loop].red = (paletteentries+loop)->peRed;
|
|
pal.pal256[loop].green = (paletteentries+loop)->peGreen;
|
|
pal.pal256[loop].blue = (paletteentries+loop)->peBlue;
|
|
}
|
|
DWORD byteswritten;
|
|
WriteFile(file,&pal,sizeof(PCXEXTPALREC),&byteswritten,NULL);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
//===========================================================================
|
|
static void UncompressPcxImage (LPBYTE dest,
|
|
LPBYTE source,
|
|
DWORD destbytes,
|
|
DWORD sourcebytes) {
|
|
LPBYTE destterm = dest+destbytes;
|
|
LPBYTE sourceterm = source+sourcebytes;
|
|
while ((dest < destterm) && (source < sourceterm)) {
|
|
BYTE val = *source++;
|
|
if (val >= 0xC0) {
|
|
DWORD count = val & 0x3F;
|
|
count = min(count,(DWORD)(destterm-dest));
|
|
val = *source++;
|
|
FillMemory(dest,count,val);
|
|
dest += count;
|
|
}
|
|
else
|
|
*dest++ = val;
|
|
}
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
*
|
|
* SUPPORT FUNCTIONS
|
|
*
|
|
***/
|
|
|
|
//===========================================================================
|
|
static LPCTSTR FindExtension (LPCTSTR filename) {
|
|
LPCTSTR result = filename;
|
|
while (SStrChr(result,'\\'))
|
|
result = SStrChr(result,'\\')+1;
|
|
while (SStrChr(result+1,'.'))
|
|
result = SStrChr(result+1,'.');
|
|
return result;
|
|
}
|
|
|
|
//===========================================================================
|
|
static DWORD DetermineImageType (WORD signature) {
|
|
switch (signature) {
|
|
|
|
case BMPSIGNATURE:
|
|
return SBMP_IMAGETYPE_BMP;
|
|
|
|
case PCXSIGNATURE:
|
|
return SBMP_IMAGETYPE_PCX;
|
|
|
|
default:
|
|
return 0;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
*
|
|
* EXPORTED FUNCTIONS
|
|
*
|
|
***/
|
|
|
|
//===========================================================================
|
|
BOOL APIENTRY SBmpAllocLoadImage (LPCTSTR filename,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE *returnedbuffer,
|
|
int *width,
|
|
int *height,
|
|
int *bitdepth,
|
|
int requestedbitdepth,
|
|
SBMPALLOCPROC allocproc) {
|
|
if (returnedbuffer)
|
|
*returnedbuffer = NULL;
|
|
if (width)
|
|
*width = 0;
|
|
if (height)
|
|
*height = 0;
|
|
if (bitdepth)
|
|
*bitdepth = 0;
|
|
|
|
VALIDATEBEGIN;
|
|
VALIDATE(filename);
|
|
VALIDATE(*filename);
|
|
VALIDATE(returnedbuffer);
|
|
VALIDATEEND;
|
|
|
|
// OPEN THE FILE
|
|
HSFILE file;
|
|
if (!SFileOpenFile(filename,&file))
|
|
return FALSE;
|
|
|
|
// LOAD THE FILE INTO MEMORY
|
|
DWORD filesize = SFileGetFileSize(file);
|
|
LPBYTE filedata = (LPBYTE)ALLOC(filesize);
|
|
SFileReadFile(file,
|
|
filedata,
|
|
filesize);
|
|
SFileCloseFile(file);
|
|
|
|
BOOL success = FALSE;
|
|
TRY {
|
|
|
|
// DETERMINE THE SOURCE IMAGE DIMENSIONS
|
|
int localwidth, localheight, localbitdepth;
|
|
if (!SBmpDecodeImage(SBMP_IMAGETYPE_AUTO,
|
|
filedata,
|
|
filesize,
|
|
NULL,
|
|
NULL,
|
|
0,
|
|
&localwidth,
|
|
&localheight,
|
|
&localbitdepth))
|
|
LEAVE;
|
|
|
|
// IF THE REQUESTED BIT DEPTH DOES NOT MATCH THE ACTUAL BIT DEPTH,
|
|
// RETURN AN ERROR, SINCE WE DO NOT CURRENTLY IMPLEMENT IMAGE FORMAT
|
|
// CONVERSION
|
|
if (!requestedbitdepth)
|
|
requestedbitdepth = localbitdepth;
|
|
if (requestedbitdepth != localbitdepth)
|
|
LEAVE;
|
|
|
|
// ALLOCATE A BUFFER TO HOLD THE IMAGE
|
|
DWORD imagesize = localwidth*localheight*requestedbitdepth/8;
|
|
if (allocproc)
|
|
*returnedbuffer = (LPBYTE)allocproc(imagesize);
|
|
else
|
|
*returnedbuffer = (LPBYTE)SMemAlloc(imagesize,
|
|
filename,
|
|
SERR_LINECODE_FILE,
|
|
0);
|
|
if (!*returnedbuffer)
|
|
LEAVE;
|
|
|
|
// DECODE THE IMAGE INTO THE BUFFER
|
|
SBmpDecodeImage(SBMP_IMAGETYPE_AUTO,
|
|
filedata,
|
|
filesize,
|
|
paletteentries,
|
|
*returnedbuffer,
|
|
imagesize);
|
|
|
|
// RETURN THE WIDTH, HEIGHT, AND BITDEPTH
|
|
if (width)
|
|
*width = localwidth;
|
|
if (height)
|
|
*height = localheight;
|
|
if (bitdepth)
|
|
*bitdepth = requestedbitdepth;
|
|
|
|
success = TRUE;
|
|
}
|
|
FINALLY {
|
|
FREE(filedata);
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
//===========================================================================
|
|
BOOL APIENTRY SBmpDecodeImage (DWORD imagetype,
|
|
LPBYTE imagedata,
|
|
DWORD imagebytes,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE bitmapbits,
|
|
DWORD buffersize,
|
|
int *width,
|
|
int *height,
|
|
int *bitdepth) {
|
|
if (width)
|
|
*width = 0;
|
|
if (height)
|
|
*height = 0;
|
|
if (bitdepth)
|
|
*bitdepth = 0;
|
|
|
|
VALIDATEBEGIN;
|
|
VALIDATE(imagedata);
|
|
VALIDATE(imagebytes);
|
|
VALIDATE(buffersize || !bitmapbits);
|
|
VALIDATEEND;
|
|
|
|
// IF NO IMAGE TYPE WAS GIVEN, TRY TO DETERMINE IT FROM THE SIGNATURE
|
|
if ((imagetype == SBMP_IMAGETYPE_AUTO) &&
|
|
(imagebytes >= sizeof(WORD)))
|
|
imagetype = DetermineImageType(*(LPWORD)imagedata);
|
|
|
|
// DECODE THE IMAGE
|
|
switch (imagetype) {
|
|
|
|
case SBMP_IMAGETYPE_BMP:
|
|
return DecodeBmpMem(imagedata,
|
|
imagebytes,
|
|
paletteentries,
|
|
bitmapbits,
|
|
buffersize,
|
|
width,
|
|
height,
|
|
bitdepth);
|
|
|
|
case SBMP_IMAGETYPE_PCX:
|
|
return DecodePcxMem(imagedata,
|
|
imagebytes,
|
|
paletteentries,
|
|
bitmapbits,
|
|
buffersize,
|
|
width,
|
|
height,
|
|
bitdepth);
|
|
|
|
default:
|
|
return FALSE;
|
|
|
|
}
|
|
}
|
|
|
|
//===========================================================================
|
|
BOOL APIENTRY SBmpLoadImage (LPCTSTR filename,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE bitmapbits,
|
|
DWORD buffersize,
|
|
int *width,
|
|
int *height,
|
|
int *bitdepth) {
|
|
if (width)
|
|
*width = 0;
|
|
if (height)
|
|
*height = 0;
|
|
if (bitdepth)
|
|
*bitdepth = 0;
|
|
|
|
VALIDATEBEGIN;
|
|
VALIDATE(filename);
|
|
VALIDATE(*filename);
|
|
VALIDATE(buffersize || !bitmapbits);
|
|
VALIDATEEND;
|
|
|
|
// OPEN THE FILE
|
|
HSFILE file;
|
|
if (!SFileOpenFile(filename,&file))
|
|
return FALSE;
|
|
|
|
// DETERMINE THE IMAGE TYPE
|
|
DWORD imagetype = 0;
|
|
{
|
|
WORD signature;
|
|
if (SFileReadFile(file,&signature,sizeof(WORD))) {
|
|
SFileSetFilePointer(file,-2,NULL,FILE_CURRENT);
|
|
imagetype = DetermineImageType(signature);
|
|
}
|
|
}
|
|
|
|
// READ AND DECODE THE IMAGE
|
|
BOOL result = FALSE;
|
|
switch (imagetype) {
|
|
|
|
case SBMP_IMAGETYPE_BMP:
|
|
result = DecodeBmpFile(file,
|
|
paletteentries,
|
|
bitmapbits,
|
|
buffersize,
|
|
width,
|
|
height,
|
|
bitdepth);
|
|
break;
|
|
|
|
case SBMP_IMAGETYPE_PCX:
|
|
result = DecodePcxFile(file,
|
|
paletteentries,
|
|
bitmapbits,
|
|
buffersize,
|
|
width,
|
|
height,
|
|
bitdepth);
|
|
break;
|
|
|
|
}
|
|
|
|
// CLOSE THE FILE
|
|
SFileCloseFile(file);
|
|
|
|
return result;
|
|
}
|
|
|
|
//===========================================================================
|
|
BOOL APIENTRY SBmpSaveImage (LPCTSTR filename,
|
|
LPPALETTEENTRY paletteentries,
|
|
LPBYTE bitmapbits,
|
|
int width,
|
|
int height,
|
|
int bitdepth) {
|
|
VALIDATEBEGIN;
|
|
VALIDATE(filename);
|
|
VALIDATE(*filename);
|
|
VALIDATE(paletteentries);
|
|
VALIDATE(bitmapbits);
|
|
VALIDATE(width > 0);
|
|
VALIDATE(height > 0);
|
|
VALIDATEEND;
|
|
|
|
// STORM CURRENTLY ONLY SUPPORTS 256-COLOR MODE, SO FOR THE TIME BEING,
|
|
// REJECT ALL BIT DEPTHS EXCEPT 8BPP
|
|
if (bitdepth != 8)
|
|
return FALSE;
|
|
|
|
// OPEN THE FILE
|
|
HANDLE file = CreateFile(filename,
|
|
GENERIC_WRITE,
|
|
0,
|
|
(LPSECURITY_ATTRIBUTES)NULL,
|
|
CREATE_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
NULL);
|
|
if (file == INVALID_HANDLE_VALUE)
|
|
return FALSE;
|
|
|
|
// WRITE THE IMAGE
|
|
LPCTSTR ext = FindExtension(filename);
|
|
BOOL result = 0;
|
|
if (ext && !_stricmp(ext,".pcx"))
|
|
result = EncodePcx256File(file,
|
|
paletteentries,
|
|
bitmapbits,
|
|
width,
|
|
height);
|
|
else if (ext && !_stricmp(ext,".gif"))
|
|
result = EncodeGif256File(file,
|
|
paletteentries,
|
|
bitmapbits,
|
|
width,
|
|
height);
|
|
else
|
|
result = EncodeBmp256File(file,
|
|
paletteentries,
|
|
bitmapbits,
|
|
width,
|
|
height);
|
|
|
|
// CLOSE THE FILE
|
|
CloseHandle(file);
|
|
|
|
return result;
|
|
}
|