GPU Pro 5

3. Bandwidth Efficient Graphics with ARM Mali GPUs 285

3.4.2 Step 2: Light Accumulation

This step makes use of both the Shader Pixel Local Storage extension and the

depth/stencil fetch extension to compute the light contribution of each light.

The lights are rendered with depth test enabled and depth writes off. (See

Listing 3.9.)

#version 300 es

#e x t e n s i o n G L EXT shader pixel local storage : enable

#e x t e n s i o n G L ARM shader framebuffer fetch depth stencil : enable

precision mediump float ;

__pixel_localEXT FragData

{

layout( r11f_g11f_b10f ) mediump vec3 Color ;

layout( rgb10_a2) mediump vec4 Normal ;

layout( r11f_g11f_b10f ) mediump vec3