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92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
//header file to load .dds files
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//these use dxtc texture compression
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#ifndef __DDS_H
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#define __DDS_H
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#include "PreProcDefines.h"
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#include "globalincs/pstypes.h"
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#ifdef _WIN32
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#include "directx/vddraw.h"
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#endif
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struct CFILE;
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#define DDS_ERROR_NONE 0 //everything went fine
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#define DDS_ERROR_INVALID_FILENAME 1 //bad filename
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#define DDS_ERROR_NO_MEM 2 //not enough mem to load
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#define DDS_ERROR_UNSUPPORTED 3 //not a readable format
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#define DDS_ERROR_INVALID_FORMAT 4 //can only use dxtc1, dxtc3, dxtc5
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#define DDS_ERROR_BAD_HEADER 5 //header was not "DDS "
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#define DDS_DXT_INVALID -1
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#define DDS_UNCOMPRESSED 0
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#define DDS_DXT1 1
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#define DDS_DXT3 3
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#define DDS_DXT5 5
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#ifndef MAKEFOURCC
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#define MAKEFOURCC(ch0, ch1, ch2, ch3) \
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((DWORD)(BYTE)(ch0) | ((DWORD)(BYTE)(ch1) << 8) | \
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((DWORD)(BYTE)(ch2) << 16) | ((DWORD)(BYTE)(ch3) << 24 ))
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#endif //defined(MAKEFOURCC)
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// FOURCC codes for DX compressed-texture pixel formats
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#define FOURCC_DXT1 (MAKEFOURCC('D','X','T','1'))
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#define FOURCC_DXT2 (MAKEFOURCC('D','X','T','2'))
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#define FOURCC_DXT3 (MAKEFOURCC('D','X','T','3'))
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#define FOURCC_DXT4 (MAKEFOURCC('D','X','T','4'))
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#define FOURCC_DXT5 (MAKEFOURCC('D','X','T','5'))
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#define DDS_FILECODE 0x20534444 // "DDS " in file
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#ifndef DUMMYUNIONNAMEN
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#if defined(__cplusplus) || !defined(NONAMELESSUNION)
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#define DUMMYUNIONNAMEN(n)
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#else
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#define DUMMYUNIONNAMEN(n) u##n
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#endif
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#endif
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//these structures are the headers for a dds file
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typedef struct _DDSCAPS2
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{
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DWORD dwCaps1;
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DWORD dwCaps2;
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DWORD Reserved[2];
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} DDSCAPS2;
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typedef struct _DDSURFACEDESC2
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{
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DWORD dwSize; // size of the DDSURFACEDESC structure
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DWORD dwFlags; // determines what fields are valid
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DWORD dwHeight; // height of surface to be created
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DWORD dwWidth; // width of input surface
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DWORD dwPitchOrLinearSize;
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DWORD dwDepth;
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DWORD dwMipMapCount;
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DWORD dwReserved1[11];
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DDPIXELFORMAT ddpfPixelFormat;
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DDSCAPS2 ddsCaps; // direct draw surface capabilities
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DWORD dwReserved2;
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} DDSURFACEDESC2, FAR* LPDDSURFACEDESC2;
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#define DDS_OFFSET 4+sizeof(DDSURFACEDESC2) //place where the data starts -- should be 128
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//reads a dds header
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//returns one of the error values
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//'compression_type' comes back as one of the DDS_DXTC* defines
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int dds_read_header(char *filename, CFILE *img_cfp = NULL, int *width = 0, int *height = 0, int *bpp = 0, int *compression_type = 0, int *levels = 0, int *size = 0);
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//reads bitmap
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//size of the data it stored in size
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int dds_read_bitmap(char *filename, ubyte **data, ubyte *bpp = NULL);
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//returns a string from a DDS error code
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const char* dds_error_string(int code);
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extern int Texture_compression_enabled;
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#endif //__DDS_H
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