OpenGL ES 3.0 Programming Guide, Second Edition

Chapter 11. Fragment Operations

This chapter discusses the operations that can be applied either to the entire framebuffer or to individual fragments after the execution of the fragment shader in the OpenGL ES 3.0 fragment pipeline. As you’ll recall, the output of the fragment shader is the fragment’s colors and depth value. The following operations occur after fragment shader execution and can affect the visibility and final color of a pixel:

• Scissor box testing

• Stencil buffer testing

• Depth buffer testing

• Multisampling

• Blending

• Dithering

The tests and operations that a fragment goes through on its way to the framebuffer are shown in Figure 11-1.

Figure 11-1 The Post-Shader Fragment Pipeline

As you might have noticed, there isn’t ...