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Diffstat (limited to 'thirdparty/squish/squish.h')
| -rw-r--r-- | thirdparty/squish/squish.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/thirdparty/squish/squish.h b/thirdparty/squish/squish.h index 7c46e37ff1..14c9bb59fb 100644 --- a/thirdparty/squish/squish.h +++ b/thirdparty/squish/squish.h @@ -239,6 +239,15 @@ int GetStorageRequirements( int width, int height, int flags ); allows for pixels outside the image to take arbitrary values. The function squish::GetStorageRequirements can be called to compute the amount of memory to allocate for the compressed output. + + Note on compression quality: When compressing textures with + libsquish it is recommended to apply a gamma-correction + beforehand. This will reduce the blockiness in dark areas. The + level of necessary gamma-correction is platform dependent. For + example, a gamma correction with gamma = 0.5 before compression + and gamma = 2.0 after decompression yields good results on the + Windows platform but for other platforms like MacOS X a different + gamma value may be more suitable. */ void CompressImage( u8 const* rgba, int width, int height, int pitch, void* blocks, int flags, float* metric = 0 ); void CompressImage( u8 const* rgba, int width, int height, void* blocks, int flags, float* metric = 0 ); |