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https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
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Changed: Implement and use CBitmap::makeTransparentPixelsBlack()
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3 changed files with 54 additions and 0 deletions
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@ -375,6 +375,12 @@ public:
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void makeOpaque();
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/**
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* Make fully transparent pixels (alpha 0) black.
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*/
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void makeTransparentPixelsBlack();
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/**
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* Return if the bitmap has uniform alpha values for all pixels.
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* \param alpha return the uniform value if return is true
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@ -369,6 +369,51 @@ void CBitmap::makeOpaque()
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}
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/*-------------------------------------------------------------------*\
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makeTransparentPixelsBlack
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\*-------------------------------------------------------------------*/
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void CBitmap::makeTransparentPixelsBlack()
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{
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if (_Width*_Height == 0) return;
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uint pixelSize;
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switch (PixelFormat)
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{
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case RGBA: pixelSize = 4; break;
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case AlphaLuminance: pixelSize = 2; break;
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default: return;
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}
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uint colorsSize = pixelSize - 1;
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for (uint8 m = 0; m < _MipMapCount; ++m)
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{
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// get a pointer on original data
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uint8 *data = _Data[m].getPtr();
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// end of data
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uint8 *endData = data + _Data[m].size();
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// first alpha
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data += pixelSize - 1;
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// replace all alpha values by 255
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while (data < endData)
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{
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// fully transparent pixel
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if (*data == 0)
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{
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// make colors black
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memset(data - colorsSize, 0, colorsSize);
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}
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data += pixelSize;
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}
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}
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}
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/*-------------------------------------------------------------------*\
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isAlphaUniform
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\*-------------------------------------------------------------------*/
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@ -350,6 +350,9 @@ int main(int argc, char **argv)
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UVMax[i].V = UVMax[i].V / (float)GlobalTexture.getHeight();
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}
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// make sure transparent pixels are black
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GlobalTexture.makeTransparentPixelsBlack();
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// Write global texture file
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if (writeFileDependingOnFilename(fmtName, GlobalTexture))
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{
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