fsleyes.gl.gl21.glvolume_funcs

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

A GLSLShader is used to manage the glvolume vertex/fragment shader programs.

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

Calls compileShaders() and updateShaderState().

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

Cleans up the shader programs.

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

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

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

Updates the parameters used by the shader programs, reflecting the current display properties.

fsleyes.gl.gl21.glvolume_funcs.preDraw(self, xform=None, bbox=None)

Sets up the GL state to draw a slice from the given GLVolume instance.

fsleyes.gl.gl21.glvolume_funcs.draw2D(self, zpos, axes, xform=None, bbox=None)

Draws the specified 2D slice from the specified image on the canvas.

Parameters:
  • self – The GLVolume object which is managing the image to be drawn.
  • zpos – World Z position of slice to be drawn.
  • axes – x, y, z axis indices.
  • xform – A 4*4 transformation matrix to be applied to the vertex data.
  • bbox – An optional bounding box.
fsleyes.gl.gl21.glvolume_funcs.draw3D(self, xform=None, bbox=None)

Draws the image in 3D on the canvas.

Parameters:
  • self – The GLVolume object which is managing the image to be drawn.
  • xform – A 4*4 transformation matrix to be applied to the vertex data.
  • bbox – An optional bounding box.
fsleyes.gl.gl21.glvolume_funcs.drawAll(self, axes, zposes, xforms)

Draws all of the specified slices.

fsleyes.gl.gl21.glvolume_funcs.postDraw(self, xform=None, bbox=None)

Cleans up the GL state after drawing from the given GLVolume instance.