ImageGear Professional for Unix
IG_DIB_raster_set
| ImageGear Professional v18.2 > API Reference Guide > Core Component API Reference > Core Component Functions Reference > DIB Functions > IG_DIB_raster_set |
This function sets a horizontal raster line of pixels into the DIB image bitmap.
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AT_ERRCOUNT ACCUAPI IG_DIB_raster_set (
HIGEAR hIGear,
AT_PIXPOS nYpos,
const LPAT_PIXEL lpPixel,
AT_MODE nFormat
);
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| Name | Type | Description |
| hIGear | HIGEAR | HIGEAR handle of an image. |
| nYpos | AT_PIXPOS | Raster line number (0 is top line). |
| lpPixel | const LPAT_PIXEL | Far pointer to first byte of the pixel data to set. |
| nFormat | AT_MODE | A variable of type AT_MODE which indicates in which manner the raster data should be stored: IG_PIXEL_PACKED, IG_PIXEL_UNPACKED, or IG_PIXEL_RLE. |
Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.
All pixel formats supported by ImageGear Professional.
See the example for function IG_DIB_raster_get().
nFormat should be set to the same format in which the rest of the data in the DIB is stored. If you choose IG_PIXEL_PACKED, your array of bytes should be padded with zeroes on the right, just as it is in the standard DIB format, such that its length is a multiple of 4.
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ImageGear's pixel access functions consider the coordinates (0,0) to refer to the upper left-hand corner of the bitmap data. They do not follow the DIB's orientation, which considers (0,0) to refer to the lower left-hand corner of the bitmap. If the image you are modifying is 1-bit, you must convert the image from run-end encoded to a standard DIB, before you can set pixel values. Please see the section Accessing Image Pixels for details. |