| | '''OpenGL extension AMD.seamless_cubemap_per_texture |
| | |
| | This module customises the behaviour of the |
| | OpenGL.raw.GL.AMD.seamless_cubemap_per_texture to provide a more |
| | Python-friendly API |
| | |
| | Overview (from the spec) |
| | |
| | In unextended OpenGL, cube maps are treated as sets of six, independent |
| | texture images. Once a face is selected from the set, it is treated exactly |
| | as any other two-dimensional texture would be. When sampling linearly from |
| | the texture, all of the individual texels that would be used to to create |
| | the final, bilinear sample values are taken from the same cube face. The |
| | normal, two-dimensional texture coordinate wrapping modes are honored. |
| | This sometimes causes seams to appear in cube maps. |
| | |
| | ARB_seamless_cube_map addresses this issue by providing a mechanism whereby |
| | an implementation could take each of the taps of a bilinear sample from |
| | a different face, spanning face boundaries and providing seamless filtering |
| | from cube map textures. However, in ARB_seamless_cube_map, this feature was |
| | exposed as a global state, affecting all bound cube map textures. It was not |
| | possible to mix seamless and per-face cube map sampling modes during |
| | multisampling. Furthermore, if an application included cube maps that were |
| | meant to be sampled seamlessly and non-seamlessly, it would have to track |
| | this state and enable or disable seamless cube map sampling as needed. |
| | |
| | This extension addresses this issue and provides an orthogonal method for |
| | allowing an implementation to provide a per-texture setting for enabling |
| | seamless sampling from cube maps. |
| | |
| | The official definition of this extension is available here: |
| | http://www.opengl.org/registry/specs/AMD/seamless_cubemap_per_texture.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.seamless_cubemap_per_texture import * |
| | from OpenGL.raw.GL.AMD.seamless_cubemap_per_texture import _EXTENSION_NAME |
| |
|
| | def glInitSeamlessCubemapPerTextureAMD(): |
| | '''Return boolean indicating whether this extension is available''' |
| | from OpenGL import extensions |
| | return extensions.hasGLExtension( _EXTENSION_NAME ) |
| |
|
| |
|
| | |
