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MGL_getJPEGSize
Obtain the dimensions of a JPEG file from disk.
Declaration
ibool MGLAPI MGL_getJPEGSize(
const char *JPEGName,
int *width,
int *height,
int *bitsPerPixel,
pixel_format_t *pf)
Prototype In
mgraph.h
Parameters
JPEGName |
Name of the bitmap file to load header for |
width |
Place to store the bitmap width |
height |
Place to store the bitmap height |
bitsPerPixel |
Place to store the bitmap pixel depth |
pf |
Place to store the bitmap pixel format information |
Return Value
True if the JPEG file was found, false if not.
Description
This functions loads all the header information for a JPEG file from disk, without actually loading the bits for the bitmap surface. This is useful to determine the dimensions and pixel format for the bitmap before it is loaded, so you can create an appropriate memory device context that you can load the bitmap into with the MGL_loadJPEGIntoDC function.
Note that JPEG files are inherently 24-bit, so when you call this function it will always return information for a 24-bit RGB pixel format image.
See Also
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