OpenGL.GLES2.shaders

Convenience module providing common shader entry points

The point of this module is to allow client code to use OpenGL Core names to reference shader-related operations even if the local hardware only supports ARB extension-based shader rendering.

There are also two utility methods compileProgram and compileShader which make it easy to create demos which are shader-using.

Functions

compileProgram( * shaders , ** named )

Create a new program, attach shaders and validate

shaders: arbitrary number of shaders to attach to the generated program.separable (keyword only) -- set the separable flag to allow for partial installation of shader into the pipeline (see glUseProgramStages)retrievable (keyword only) -- set the retrievable flag to allow retrieval of the program binary representation, (see glProgramBinary, glGetProgramBinary)

This convenience function is *not* standard OpenGL, but it does wind up being fairly useful for demos and the like. You may wish to copy it to your code base to guard against PyOpenGL changes.

Usage:

shader = compileProgram( compileShader( source, GL_VERTEX_SHADER ), compileShader( source2, GL_FRAGMENT_SHADER ), ) glUseProgram( shader )

Note: If (and only if) validation of the linked program *passes* then the passed-in shader objects will be deleted from the GL.

returns ShaderProgram() (GLuint) program reference raises RuntimeError when a link/validation failure occurs

compileShader( source , shaderType )

Compile shader source of given type