[Mesa-dev] [RFC-PATCH 00/11] add support for GL_OES_EGL_image_external
eric at anholt.net
Mon Oct 31 08:46:54 PDT 2011
On Mon, 31 Oct 2011 03:07:26 +0800, Chia-I Wu <olvaffe at gmail.com> wrote:
> From: Chia-I Wu <olv at lunarg.com>
> This patch series adds support for the OpenGL ES specific
> GL_OES_EGL_image_external extension. It is enabled in st/mesa.
> The extension is written with YUV formats in mind. It describes two possible
> ways to to support them. One is to insert extra instructions to the shaders
> to let GPU perform the necessary color conversions on the fly. The other is
> to allocate an internal storage to perform the conversions when the EGLImage
> is specified. Neither is supported for this series. It effectively makes the
> implementation a subset of GL_OES_EGL_image function-wise.
Both of these options are why I hated the idea of this extension.
If the application wants to do YUV conversion, it should be doing YUV
conversion. We give them access to shaders for a reason. Hiding the
interaction between planar YUV and actual texture units is going to be
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