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Image: Export emissive colors in 3 channel PNG images 

Related to T81199. When saving a rendered image with transparency (RGBA)
to a 3 channel PNG image the emissive colors were not exported. This
change adds the emissive colors to the written file.

NOTE: this does not fix the limitation of writing emissive colors to a 4
channel PNG file as the file format does not support this.
This commit is contained in:
Jeroen Bakker 2020-10-19 11:29:47 +02:00
parent f52f51aef2
commit 850944e6cd
1 changed files with 2 additions and 11 deletions
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13
source/blender/imbuf/intern/imageprocess.c
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@ -458,17 +458,8 @@ void IMB_alpha_under_color_float(float *rect_float, int x, int y, float backcol[
float *fp = rect_float;
while (a--) {
if (fp[3] == 0.0f) {
copy_v3_v3(fp, backcol);
}
else {
float mul = 1.0f - fp[3];
fp[0] += mul * backcol[0];
fp[1] += mul * backcol[1];
fp[2] += mul * backcol[2];
}
const float mul = 1.0f - fp[3];
madd_v3_v3fl(fp, backcol, mul);
fp[3] = 1.0f;
fp += 4;