pdfGetImageDecodeRange
Get the decode range for an image color component.
void pdfGetImageDecodeRange(PDFHandle pdf, int idx, int component,
double *low, double *high)
This function returns the component decode range (which is most
commonly 0..1 or 1..0, but can be completely different) for
the
idxth image on the page specified in the
last call to pdfGetImages.
C:
double low, high;
int nImgs, i, j, mask, colorSpace, w, h, nComps;
pdfGetImages(pdf, 1);
nImgs = pdfGetNumImages(pdf);
for (i = 0; i < nImgs; ++i) {
pdfGetImageInfo(pdf, i, &mask, &colorSpace, &w, &h);
nComps = pdfGetImageNumComponents(pdf, i);
printf("image %d: %s with %d components\n",
i, pdfGetColorSpaceName(colorSpace), nComps);
for (j = 0; j < nComps; ++j) {
pdfGetImageDecodeRange(pdf, i, j, &low, &high);
printf(" decode: %g %g\n", low, high);
}
}