Mathis/sharp
1
0
Fork 0
mirror of https://github.com/lovell/sharp.git synced 2026-02-05 06:06:18 +01:00
Code Issues Packages Projects Releases Wiki Activity

Allow non-RGB input to embed/extend onto bg with alpha #646

Browse Source
This commit is contained in:
Lovell Fuller
2016-12-11 15:58:20 +00:00
parent 61721bb086
commit d2455267a8
11 changed files with 74 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/common.cc
View File

@@ -434,4 +434,20 @@ namespace sharp {
);
}
/*
Convert RGBA value to another colourspace
*/
std::vector<double> GetRgbaAsColourspace(std::vector<double> const rgba, VipsInterpretation const interpretation) {
int const bands = static_cast<int>(rgba.size());
if (bands < 3 || interpretation == VIPS_INTERPRETATION_sRGB || interpretation == VIPS_INTERPRETATION_RGB) {
return rgba;
} else {
VImage pixel = VImage::new_matrix(1, 1);
pixel.set("bands", bands);
pixel = pixel.new_from_image(rgba);
pixel = pixel.colourspace(interpretation, VImage::option()->set("source_space", VIPS_INTERPRETATION_sRGB));
return pixel(0, 0);
}
}
} // namespace sharp