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'''OpenGL extension APPLE.aux_depth_stencil |
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This module customises the behaviour of the |
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OpenGL.raw.GL.APPLE.aux_depth_stencil to provide a more |
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Python-friendly API |
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Overview (from the spec) |
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Normally, each OpenGL drawable allocates at most one depth buffer and one |
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stencil buffer, regardless of how many aux buffers there are. |
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When the APPLE_aux_depth_stencil extension is used, and the depth buffer |
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size is non-zero, the GL silently allocates a separate depth buffer for the |
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color buffer and for each aux buffer. Similarly, if the stencil buffer size |
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is non-zero, a separate stencil buffer is allocated for the color buffer and |
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each aux buffer. This extension does not cause separate depth or stencil |
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buffers to be allocated for the left and right buffers of a stereo drawable. |
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A context with no aux buffers will be unaffected by this extension. |
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Switching the draw or read buffer from the color buffer to an aux buffer, or |
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switching between two aux buffers, simultaneously switches the associated |
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depth and stencil buffers, for drawing or reading. |
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For example, if an OpenGL context has two aux buffers and non-zero depth |
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buffer size, it will have a total of three depth buffers - one associated |
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with the color buffer and one associated with each aux buffer. If that |
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context is used to render to AUX0, then to render to AUX1, the changes to |
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the depth buffer made by the rendering to AUX1 will not affect the depth |
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buffer associated with AUX0, and vice versa. |
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The official definition of this extension is available here: |
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http://www.opengl.org/registry/specs/APPLE/aux_depth_stencil.txt |
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''' |
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from OpenGL import platform, constant, arrays |
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from OpenGL import extensions, wrapper |
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import ctypes |
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from OpenGL.raw.GL import _types, _glgets |
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from OpenGL.raw.GL.APPLE.aux_depth_stencil import * |
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from OpenGL.raw.GL.APPLE.aux_depth_stencil import _EXTENSION_NAME |
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def glInitAuxDepthStencilAPPLE(): |
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'''Return boolean indicating whether this extension is available''' |
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from OpenGL import extensions |
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return extensions.hasGLExtension( _EXTENSION_NAME ) |
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