drewcassidy/nvidia-texture-tools
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Bug fix. Only use tonormal conversion for top of the mipmap chain.

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This commit is contained in:
castano 2008-02-11 08:35:32 +00:00
parent ccd9e86d54
commit c3749f48cd
1 changed files with 4 additions and 7 deletions
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11
src/nvtt/Compressor.cpp
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@ -418,9 +418,9 @@ bool Compressor::Private::initMipmap(Mipmap & mipmap, const InputOptions::Privat
// Find image from input.
int inputIdx = findExactMipmap(inputOptions, w, h, d, f);
if (inputIdx == -1 && m != 0)
if ((inputIdx == -1 || inputOptions.convertToNormalMap) && m != 0)
{
// If input mipmap not found, and not top of the chain, then generate from last.
// Generate from last, when mipmap not found, or normal map conversion enabled.
downsampleMipmap(mipmap, inputOptions);
}
else
@ -561,11 +561,8 @@ void Compressor::Private::processInputImage(Mipmap & mipmap, const InputOptions:
if (inputOptions.convertToNormalMap)
{
mipmap.toFixedImage(inputOptions);
// @@ Compute heighmap scale factor correctly.
// m = original_width / this_width
// Scale height factor by 1 / 2 ^ m
Vector4 heightScale = inputOptions.heightFactors; // / float(1 << m);
Vector4 heightScale = inputOptions.heightFactors;
mipmap.setImage(createNormalMap(mipmap.asFixedImage(), (FloatImage::WrapMode)inputOptions.wrapMode, heightScale, inputOptions.bumpFrequencyScale));
}
else if (inputOptions.isNormalMap)