kc3-lang/angle/src/image_util

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  Commit

• Hash : e6582161
  Author :
  Date : 2019-09-16T12:39:18
  

  Convert DXT1 RGB data to DXT3 RGBA when uploading to the GPU.
  
  DXT1 has a specific 'BLACK' code that results in transparent black pixels when
  sampled. D3D does not have specific RGB-only DXT1 formats like OpenGL does so
  when this code is encountered, we sample 0 alpha for these pixels when GL would
  expect 1 because the alpha channel should not exist.
  
  Work around this by converting to DXT3 RGBA, adding an extra block of 1.0 alpha
  pixels for each color block.
  
  Mac Intel OpenGL requires additional workarounds to always sample 1.0 alpha.
  Set the texture swizzle parameters to force it.
  
  BUG=angleproject:3729
  
  Change-Id: Ia3647085acd97bb01af4e95ef3f6f21dcfb6a554
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1804880
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Ian Elliott <ianelliott@google.com>
  

• Files

• copyimage.cpp
• copyimage.h
• copyimage.inc
• generatemip.h
• generatemip.inc
• imageformats.cpp
• imageformats.h
• loadimage.cpp
• loadimage.h
• loadimage.inc
• loadimage_etc.cpp

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• Git HTTP	https://git.kmx.io/kc3-lang/angle.git
  Git SSH	git@git.kmx.io:kc3-lang/angle.git
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  Description	A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android. Homepage Github
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