O glOrtho Multiplies the current matrix by an orthographic matrix. Places a marker in the feedback buffer. Specifies the pixel zoom factors. Selects a polygon rasterization mode. Sets the scale and bias used to calculate z values.
Sets texture residence priority.
R glRasterPos Specifies the raster position for pixel operations. Reads a block of pixels from the frame buffer. Draws a rectangle. Sets rasterization mode. S glScale Multiplies the current matrix by a general scaling matrix.