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PNG: fix scaling of grayscale images

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Matthias Schiffer 2015-02-03 13:59:12 +01:00
parent cca2ec58fb
commit 4cd7e83a70
1 changed files with 1 additions and 1 deletions
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src/PNG.cpp
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@ -130,7 +130,7 @@ static void readScaled(uint8_t *data, size_t offset_w, size_t offset_h, const ch
for (size_t h = 0; h < width/2; h++) { for (size_t h = 0; h < width/2; h++) {
for (size_t w = 0; w < width/2; w++) { for (size_t w = 0; w < width/2; w++) {
for (size_t c = 0; c < 4; c++) { for (size_t c = 0; c < b; c++) {
size_t i = 2*b*(width*h + w) + c; size_t i = 2*b*(width*h + w) + c;
data[b*(width*(offset_h+h) + offset_w+w) + c] = (input[i] + input[i+b] + input[i+b*width] + input[i+b*width+b])/4; data[b*(width*(offset_h+h) + offset_w+w) + c] = (input[i] + input[i+b] + input[i+b*width] + input[i+b*width+b])/4;
} }