56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/******************************************************************************
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** Filename : imageSgi.h
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** UNCLASSIFIED
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**
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** Description : Utility to read SGI image format files. This code was
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** originally a SGI image loading utility provided with the
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** Mesa 3D library @ http://www.mesa3d.org by Brain Paul.
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** This has been extended to read all SGI image formats
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** (e.g. INT, INTA, RGB, RGBA).
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**
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** Revision History:
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** Date Name Description
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** 06/08/99 BRC Initial Release
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**
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******************************************************************************/
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#ifndef __IMAGESGI_H
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#define __IMAGESGI_H
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#define IMAGE_SGI_TYPE_VERBATIM 0
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#define IMAGE_SGI_TYPE_RLE 1
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struct sImageSgiHeader // 512 bytes
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{
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short magic; // IRIS image file magic number (474)
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char type; // Storage format (e.g. RLE or VERBATIM)
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char numBytesPerPixelChannel; // Number of bytes per pixel channel
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unsigned short dim; // Number of dimensions (1 to 3)
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unsigned short xsize; // Width (in pixels)
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unsigned short ysize; // Height (in pixels)
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unsigned short zsize; // Number of channels (1 to 4)
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int minimumPixelValue; // Minimum pixel value (0 to 255)
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int maximumPixelValue; // Maximum pixel value (0 to 255)
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char padding1[4]; // (ignored)
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char imageName[80]; // Image name
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int colormap; // colormap ID (0=normal, 0=dithered,
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// 2=screen, 3=colormap)
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char padding2[404]; // (ignored)
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};
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struct sImageSgi
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{
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struct sImageSgiHeader header;
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unsigned char *data;
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};
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#ifndef __IMAGESGI_CPP
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// RGB image load utility
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extern struct sImageSgi *ImageSgiOpen(char const * const fileName);
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extern void ImageSgiClose(struct sImageSgi *image);
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#endif
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#endif /* __IMAGESGI_H */
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