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| author | twiz@chromium.org <twiz@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-04-20 17:06:28 +0000 |
|---|---|---|
| committer | twiz@chromium.org <twiz@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-04-20 17:06:28 +0000 |
| commit | 43410e98156161a042bcc2cf31b8a4670830f84e (patch) | |
| tree | 29fed576d01cba8f70d8598596fab3fac949adc8 /gpu/command_buffer/service/gl_utils.h | |
| parent | 7f85791b0e6ce5a7745a26be8adc4cebf0ee409d (diff) | |
| download | chromium_src-43410e98156161a042bcc2cf31b8a4670830f84e.zip chromium_src-43410e98156161a042bcc2cf31b8a4670830f84e.tar.gz chromium_src-43410e98156161a042bcc2cf31b8a4670830f84e.tar.bz2 | |
Re-submission of http://codereview.chromium.org/9968113
This version corrects the problem that caussed the revert of the above issue. The shaders used by the extension were specifying a precision, which is not supported on desktop GL. The shaders now conditionally specify the precision.
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Introduction of CHROMIUM_copy_texture extension that respects pixel-store semantics, and allows copying of BGRA textures.
OpenGL ES does not natively allow for copying textures with a BGRA format. The EXT_texture_format_BGRA8888 extension does not specify support for glCopyTexImage calls on these textures.
This extension provides a routine to perform texture copies to/from BGRA-backed textures that also respects the following CHROMIUM pixel storage modifiers:
UNPACK_FLIP_Y_CHROMIUM
UNPACK_PREMULTIPLY_ALPHA_CHROMIUM
This extension will be useful for the following purposes:
- Copying accelerated Canvas2D contents to WebGL textures without a software readback. (And potentially the same for video-webgl texture copies.)
- Copying Canvas2D contents to the compositor backing store.
BUG=101051
TEST=none
Review URL: http://codereview.chromium.org/10124016
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133213 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'gpu/command_buffer/service/gl_utils.h')
| -rw-r--r-- | gpu/command_buffer/service/gl_utils.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gpu/command_buffer/service/gl_utils.h b/gpu/command_buffer/service/gl_utils.h index 64495b3..d0d8411 100644 --- a/gpu/command_buffer/service/gl_utils.h +++ b/gpu/command_buffer/service/gl_utils.h @@ -42,6 +42,12 @@ // GL_ANGLE_translated_shader_source #define GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE 0x93A0 +// GL_CHROMIUM_flipy +#define GL_UNPACK_FLIP_Y_CHROMIUM 0x9240 + +#define GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM 0x9241 +#define GL_UNPACK_COLORSPACE_CONVERSION_CHROMIUM 0x9243 + // GL_ANGLE_pack_reverse_row_order #define GL_PACK_REVERSE_ROW_ORDER_ANGLE 0x93A4 |