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Look at whole tex for alpha mask

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This commit is contained in:
Zach Pomerantz 2016-03-18 10:39:27 -07:00
parent 481a75faca
commit a0ba5d3c29
1 changed files with 5 additions and 8 deletions
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13
libraries/model/src/model/TextureMap.cpp
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@ -56,7 +56,7 @@ gpu::Texture* TextureUsage::create2DTextureFromImage(const QImage& srcImage, con
bool validAlpha = false;
bool alphaAsMask = true;
const uint8 OPAQUE_ALPHA = 255;
const uint8 TRANSLUCENT_ALPHA = 0;
const uint8 TRANSPARENT_ALPHA = 0;
if (image.hasAlphaChannel()) {
std::map<uint8, uint32> alphaHistogram;
@ -70,10 +70,7 @@ gpu::Texture* TextureUsage::create2DTextureFromImage(const QImage& srcImage, con
for (int x = 0; x < image.width(); ++x) {
auto alpha = qAlpha(data[x]);
alphaHistogram[alpha] ++;
if (alpha != OPAQUE_ALPHA) {
validAlpha = true;
break;
}
validAlpha = validAlpha || (alpha != OPAQUE_ALPHA);
}
}
@ -81,10 +78,10 @@ gpu::Texture* TextureUsage::create2DTextureFromImage(const QImage& srcImage, con
if (validAlpha && (alphaHistogram.size() > 1)) {
auto totalNumPixels = image.height() * image.width();
auto numOpaques = alphaHistogram[OPAQUE_ALPHA];
auto numTranslucents = alphaHistogram[TRANSLUCENT_ALPHA];
auto numTransparents = totalNumPixels - numOpaques - numTranslucents;
auto numTransparents = alphaHistogram[TRANSPARENT_ALPHA];
auto numTranslucents = totalNumPixels - numOpaques - numTransparents;
alphaAsMask = ((numTransparents / (double)totalNumPixels) < 0.05);
alphaAsMask = ((numTranslucents / (double)totalNumPixels) < 0.05);
}
}