| '''OpenGL extension OES.draw_texture |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GLES1.OES.draw_texture to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension defines a mechanism for writing pixel |
| rectangles from one or more textures to a rectangular |
| region of the screen. This capability is useful for |
| fast rendering of background paintings, bitmapped font |
| glyphs, and 2D framing elements in games. This |
| extension is primarily intended for use with OpenGL ES. |
| |
| The extension relies on a new piece of texture state |
| called the texture crop rectangle, which defines a |
| rectangular subregion of a texture object. These |
| subregions are used as sources of pixels for the texture |
| drawing function. |
| |
| Applications use this extension by configuring the |
| texture crop rectangle for one or more textures via |
| ActiveTexture() and TexParameteriv() with pname equal to |
| TEXTURE_CROP_RECT_OES. They then request a drawing |
| operation using DrawTex{sifx}[v]OES(). The effect of |
| the latter function is to generate a screen-aligned |
| target rectangle, with texture coordinates chosen to map |
| the texture crop rectangle(s) linearly to fragments in |
| the target rectangle. The fragments are then processed |
| in accordance with the fragment pipeline state. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/OES/draw_texture.txt |
| ''' |
| from OpenGL import platform, constant, arrays |
| from OpenGL import extensions, wrapper |
| import ctypes |
| from OpenGL.raw.GLES1 import _types, _glgets |
| from OpenGL.raw.GLES1.OES.draw_texture import * |
| from OpenGL.raw.GLES1.OES.draw_texture import _EXTENSION_NAME |
|
|
| def glInitDrawTextureOES(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
| glDrawTexsvOES=wrapper.wrapper(glDrawTexsvOES).setInputArraySize( |
| 'coords', 5 |
| ) |
| glDrawTexivOES=wrapper.wrapper(glDrawTexivOES).setInputArraySize( |
| 'coords', 5 |
| ) |
| glDrawTexxvOES=wrapper.wrapper(glDrawTexxvOES).setInputArraySize( |
| 'coords', 5 |
| ) |
| glDrawTexfvOES=wrapper.wrapper(glDrawTexfvOES).setInputArraySize( |
| 'coords', 5 |
| ) |
| |
