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Changing C compression API for XUAST LDR: if unified quality level is not being used, and the lower level uastc_rdo_or_dct_quality parameter was set to 100, we would previously return an error. Now DCT is not enabled, as expected.

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This commit is contained in:
Richard Geldreich
2026-03-04 10:08:34 -05:00
parent c4d7061d58
commit 961935d699
1 changed files with 10 additions and 8 deletions
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18
encoder/basisu_comp.cpp
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@@ -5096,15 +5096,17 @@ namespace basisu
// Valid XUASTC LDR weight grid DCT quality levels are 1-100.
if (basist::basis_tex_format_is_xuastc_ldr(mode) && (uastc_rdo_or_dct_quality != 0.0f))
{
// TODO: change this so 100=no DCT to simplify the non-unified API, right now they must set 0=no DCT
if ((uastc_rdo_or_dct_quality >= (float)BASISU_XUASTC_QUALITY_MIN) && (uastc_rdo_or_dct_quality < (float)BASISU_XUASTC_QUALITY_MAX))
if ((uastc_rdo_or_dct_quality >= (float)BASISU_XUASTC_QUALITY_MIN) && (uastc_rdo_or_dct_quality <= (float)BASISU_XUASTC_QUALITY_MAX))
{
// Enable weight grid DCT usage, set quality level.
comp_params.m_xuastc_ldr_use_dct = true;
comp_params.m_quality_level = (int)uastc_rdo_or_dct_quality;
// Also enable bounded lossy distortion mode in the normally lossless supercompressor for extra savings.
comp_params.m_xuastc_ldr_use_lossy_supercompression = true;
if (uastc_rdo_or_dct_quality < (float)BASISU_XUASTC_QUALITY_MAX)
{
// Enable weight grid DCT usage, set quality level.
comp_params.m_xuastc_ldr_use_dct = true;
comp_params.m_quality_level = (int)uastc_rdo_or_dct_quality;
// Also enable bounded lossy distortion mode in the normally lossless supercompressor for extra savings.
comp_params.m_xuastc_ldr_use_lossy_supercompression = true;
}
}
else
{