This function loads the palette pointed to by lpPalette into the DIB, replacing the prior palette that was present.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_palette_set (
HIGEAR hIGear,
const LPAT_RGBQUAD lpPalette
);
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Arguments:
| HIGEAR | HIGEAR handle of image. |
| LpPalette | Far pointer to the first of an array of AT_RGBQUAD structs containing the palette you wish to load into the DIB, as the image's new DIB palette. |
Return Value:
Returns the number of ImageGear errors that occurred during this function call.
Supported Raster Image Formats:
Indexed RGB - 1…8 bpp.
Sample:
Palette Edit
Example:
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HIGEAR hIGear; /* HIGEAR handle of image */ AT_ERRCOUNT nErrcount; /* Returned count of errors on stack */ AT_RGBQUAD rgbqPalette[256]; /* Array of AT_RGBQUAD structs */ INT pix; /* Loop index, = pixel value */ /* Create a grayscale palette, and set it into image hIGear's DIB: */ for ( pix = 0; pix <= 255; pix++ ) { rgbqPalette[pix].rgbBlue = pix; rgbqPalette[pix].rgbGreen = pix; rgbqPalette[pix].rgbRed = pix; rgbqPalette[pix].rgbReserved = 0; } nErrcount = IG_palette_set ( hIGear, rgbqPalette ); |
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Remarks:
Your palette pointed to by lpPalette must be in the form of AT_RGBQUAD structs: 4 bytes per entry, ordered Blue-Green-Red-Unused (0). The number of consecutive AT_RGBQUAD structs you need is determined by the number of Bits Per Pixel in the image. For example, for an 8 bit image, you would need an array of 256 AT_RGBQUAD structs.
If the image is 24 bit, this function will set an error and return.
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See also function IG_palette_set(). |