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LibGfx/TIFF: Use a wider type for palette indices to prevent overflow
We refuse any image with a sample depth greater than 32, storing these value as `u64` prevent any overflows. This is probably overkill as no one in their right mind will use a 32 bits color table.
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1 changed files with 4 additions and 4 deletions
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@ -182,10 +182,10 @@ private:
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// From description of PhotometricInterpretation in Section 8: Baseline Field Reference Guide
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// "In a TIFF ColorMap, all the Red values come first, followed by the Green values,
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// then the Blue values."
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auto const size = 1 << (*m_metadata.bits_per_sample())[0];
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auto const red_offset = 0 * size;
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auto const green_offset = 1 * size;
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auto const blue_offset = 2 * size;
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u64 const size = 1ul << (*m_metadata.bits_per_sample())[0];
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u64 const red_offset = 0 * size;
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u64 const green_offset = 1 * size;
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u64 const blue_offset = 2 * size;
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auto const color_map = *m_metadata.color_map();
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