| | '''OpenGL extension AMD.stencil_operation_extended |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.AMD.stencil_operation_extended to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | Stencil buffers are special buffers that allow tests to be made against an |
| | incoming value and action taken based on that value. The stencil buffer is |
| | updated during rasterization, and the operation used to update the stencil |
| | buffer is chosen based on whether the fragment passes the stencil test, |
| | and if it does, whether it passes the depth test. Traditional OpenGL |
| | includes support for several primitive operations, such as incrementing, |
| | or clearing the content of the stencil buffer, or replacing it with a |
| | specified reference value. |
| | |
| | This extension adds support for an additional set of operations that may |
| | be performed on the stencil buffer under each circumstance. Additionally, |
| | this extension separates the value used as the source for stencil |
| | operations from the reference value, allowing different values to be used |
| | in the stencil test, and in the update of the stencil buffer. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/AMD/stencil_operation_extended.txt |
| | ''' |
| | from OpenGL import platform, constant, arrays |
| | from OpenGL import extensions, wrapper |
| | import ctypes |
| | from OpenGL.raw.GL import _types, _glgets |
| | from OpenGL.raw.GL.AMD.stencil_operation_extended import * |
| | from OpenGL.raw.GL.AMD.stencil_operation_extended import _EXTENSION_NAME |
| |
|
| | def glInitStencilOperationExtendedAMD(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
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| |
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| | |
