diff options
| author | twiz@chromium.org <twiz@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-06-19 15:43:17 +0000 |
|---|---|---|
| committer | twiz@chromium.org <twiz@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-06-19 15:43:17 +0000 |
| commit | 6c75c71e79b70dcf32982b1da3e219c277872162 (patch) | |
| tree | e815368906a055004f7273b3c7119764f48689e0 /gpu/GLES2 | |
| parent | a9377f622db492fbf08fc12eac9d504bb5a4a8b7 (diff) | |
| download | chromium_src-6c75c71e79b70dcf32982b1da3e219c277872162.zip chromium_src-6c75c71e79b70dcf32982b1da3e219c277872162.tar.gz chromium_src-6c75c71e79b70dcf32982b1da3e219c277872162.tar.bz2 | |
Addition of an unpremultiplied-alpha setting for the GL_CHROMIUM_copy_texture command buffer GL extension.
The extension needs to support the ability to unpremultiply the source of the copy because of the canvas2d-webgl texture use case. Canvas is stored in premultiplied form, yet WebGL expects texture contents to be in unpremultiplied form.
Change also includes conversion of argument types to overriders of WebGraphicsContext3D::copyTextureCHROMIUM(...).
This change is necessary as a result of a wk-change: https://bugs.webkit.org/show_bug.cgi?id=86275
BUG=101051
TEST=none
Review URL: https://chromiumcodereview.appspot.com/10535174
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@142962 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'gpu/GLES2')
| -rw-r--r-- | gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt index 0b22f6b..57085b9 100644 --- a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt +++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt @@ -23,7 +23,12 @@ Overview glCopyTexImage2D command. A new function is exported, glCopyTextureCHROMIUM, that performs the same copy operation as glCopyTexImage2D, while respecting the pixel-storage modifiers - UNPACK_FLIP_Y_CHROMIUM and GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM. + UNPACK_FLIP_Y_CHROMIUM, GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM and + GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM. + + If GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM and + GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM are enabled. Then no alpha + processing occurs. This is the equivalent of having neither flag set. The extension also supports copying BGRA textures, which is not explicitly granted by EXT_texture_format_BGRA8888. |