fsleyes.gl.gl21.gllabel_funcs

This module provides functions which are used by the GLLabel class to render Image overlays in an OpenGL 2.1 compatible manner.

Rendering of a GLLabel is very similar to that of a GLVolume, with the exception that a different fragment shader (gllabel) is used. The preDraw, draw, drawAll and postDraw functions defined in the gl21.glvolume_funcs are re-used by this module.

fsleyes.gl.gl21.gllabel_funcs.init(self)

Calls the compileShaders() and updateShaderState() functions.

fsleyes.gl.gl21.gllabel_funcs.destroy(self)

Destroys the shader programs.

fsleyes.gl.gl21.gllabel_funcs.compileShaders(self)

Loads the vertex/fragment shader source code, and creates a GLSLShader program.

fsleyes.gl.gl21.gllabel_funcs.updateShaderState(self)

Updates all shader program variables.

fsleyes.gl.gl21.gllabel_funcs.draw2D(self, *args, **kwargs)

Draws the label overlay in 2D. See GLObject.draw2D().

fsleyes.gl.gl21.gllabel_funcs.drawAll(self, *args, **kwargs)

Draws the label overlay in 2D. See GLObject.draw2D().