136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
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/*==========================================================================
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*
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* Copyright (c) 1995 - 1997 Microsoft Corporation. All Rights Reserved.
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* Copyright (C) 1994-1995 ATI Technologies Inc. All Rights Reserved.
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*
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* File: bmp.c
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* Content: Bitmap reader
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*
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***************************************************************************/
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#include "foxbear.h"
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/*
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* gfxLoadBitmap
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*/
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GFX_HBM gfxLoadBitmap(LPSTR szFileName)
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{
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HFASTFILE pfile;
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BITMAPFILEHEADER UNALIGNED *pbf;
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BITMAPINFOHEADER UNALIGNED *pbi;
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GFX_HBM hbm;
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BOOL trans = FALSE;
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pfile = FastFileOpen( szFileName );
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if( pfile == NULL )
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{
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return NULL;
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}
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pbf = (BITMAPFILEHEADER *)FastFileLock(pfile, 0, 0);
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pbi = (BITMAPINFOHEADER *)(pbf+1);
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if (pbf->bfType != 0x4d42 ||
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pbi->biSize != sizeof(BITMAPINFOHEADER))
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{
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Msg("Failed to load");
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Msg(szFileName);
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FastFileClose( pfile );
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return NULL;
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}
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/*
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* TOTAL HACK for FoxBear, FoxBear does not use any masks, it draws
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* sprites with transparent colors, but the code still loads the masks
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* if a mask exists the sprite is transparent, else it is not, so
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* you cant get rid of the masks or nothing will be transparent!!
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*
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* if the code tries to load a mask, just return a non-zero value.
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*/
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if( pbi->biBitCount == 1 )
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{
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Msg("some code is still using masks, stop that!");
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FastFileClose( pfile );
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return NULL;
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}
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/*
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* ANOTHER TOTAL HACK for FoxBear, some of the bitmaps in FoxBear
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* are a solid color, detect these and dont waste VRAM on them.
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*/
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if( !bTransDest && pbi->biBitCount == 8 )
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{
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int x,y;
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BYTE c;
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BYTE UNALIGNED *pb = (LPBYTE)pbi + pbi->biSize + 256 * sizeof(COLORREF);
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RGBQUAD UNALIGNED *prgb = (RGBQUAD *)((LPBYTE)pbi + pbi->biSize);
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COLORREF rgb;
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c = *pb;
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for(y=0; y<(int)pbi->biHeight; y++ )
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{
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for( x=0; x<(int)pbi->biWidth; x++ )
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{
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if (c != *pb++)
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goto not_solid;
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}
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pb += ((pbi->biWidth + 3) & ~3) - pbi->biWidth;
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}
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rgb = RGB(prgb[c].rgbRed,prgb[c].rgbGreen,prgb[c].rgbBlue);
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hbm = gfxCreateSolidColorBitmap(rgb);
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FastFileClose( pfile );
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return hbm;
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}
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not_solid:
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/*
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* figure out iff the bitmap has the transparent color in it.
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*/
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if( pbi->biBitCount == 8 )
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{
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int x,y;
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BYTE UNALIGNED *pb = (LPBYTE)pbi + pbi->biSize + 256 * sizeof(COLORREF);
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DWORD UNALIGNED *prgb = (DWORD *)((LPBYTE)pbi + pbi->biSize);
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for(y=0; y<(int)pbi->biHeight && !trans; y++ )
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{
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for( x=0; x<(int)pbi->biWidth && !trans; x++ )
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{
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if (prgb[*pb++] == 0x00FFFFFF)
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trans=TRUE;
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}
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pb += ((pbi->biWidth + 3) & ~3) - pbi->biWidth;
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}
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}
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hbm = gfxCreateVramBitmap(pbi, trans);
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if( hbm == NULL )
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{
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FastFileClose( pfile );
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return GFX_FALSE;
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}
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#if 0
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{
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DDSCAPS ddscaps;
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IDirectDrawSurface_GetCaps(((GFX_BITMAP *)hbm)->lpSurface, &ddscaps);
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if( !(ddscaps.dwCaps & DDSCAPS_VIDEOMEMORY) )
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{
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Msg( "%s is in system memory", szFileName );
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}
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}
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#endif
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FastFileClose( pfile );
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return hbm;
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} /* gfxLoadBitmap */
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