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Apply swizzle to user supplied mipmaps

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This commit is contained in:
flashk
2021-04-14 10:37:16 -07:00
committed by GitHub
parent ee626cec19
commit 1cd2b7506a
1 changed files with 16 additions and 1 deletions
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17
encoder/basisu_comp.cpp
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@@ -623,7 +623,22 @@ namespace basisu
// User-provided mipmaps for each layer or image in the texture array.
for (uint32_t mip_index = 0; mip_index < m_params.m_source_mipmap_images[source_file_index].size(); mip_index++)
{
const image& mip_img = m_params.m_source_mipmap_images[source_file_index][mip_index];
image& mip_img = m_params.m_source_mipmap_images[source_file_index][mip_index];
if (m_params.m_swizzle[0] != 0 ||
m_params.m_swizzle[1] != 1 ||
m_params.m_swizzle[2] != 2 ||
m_params.m_swizzle[3] != 3)
{
// Used for XY normal maps in RG - puts X in color, Y in alpha
for (uint32_t y = 0; y < mip_img.get_height(); y++)
for (uint32_t x = 0; x < mip_img.get_width(); x++)
{
const color_rgba &c = mip_img(x, y);
mip_img(x, y).set_noclamp_rgba(c[m_params.m_swizzle[0]], c[m_params.m_swizzle[1]], c[m_params.m_swizzle[2]], c[m_params.m_swizzle[3]]);
}
}
slices.push_back(mip_img);
}
}