| '''OpenGL extension EXT.YUV_target |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GLES2.EXT.YUV_target to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension adds support for three new YUV related items: first |
| rendering to YUV images, second sampling from YUV images while keeping the |
| data in YUV space, third it defines a new built in function that does |
| conversion from RGB to YUV with controls to choose ITU-R BT.601-7, |
| ITU-R BT.601-7 Full range (JFIF images), or ITU-R BT.709-5 standard. |
| |
| This new functionality is layered on top of the OES_EGL_image_external |
| extension. |
| |
| To perform the YUV rendering capability in this extension an application |
| will attach a texture to the framebuffer object as the color attachment. |
| If the texture has a target type of TEXTURE_EXTERNAL_OES with YUV color |
| format then the GL driver can use this framebuffer object as the render |
| target, TEXTURE_EXTERNAL_OES target with RGB color format are not allowed |
| with this extension. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/EXT/YUV_target.txt |
| ''' |
| from OpenGL import platform, constant, arrays |
| from OpenGL import extensions, wrapper |
| import ctypes |
| from OpenGL.raw.GLES2 import _types, _glgets |
| from OpenGL.raw.GLES2.EXT.YUV_target import * |
| from OpenGL.raw.GLES2.EXT.YUV_target import _EXTENSION_NAME |
|
|
| def glInitYuvTargetEXT(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
|
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| |
