Mali GPU User Interface Engine Application Development Guide

Tutorial on Constructing Custom Shaders6.5 Assigning the shader programsThere are the following ways to assign the shader code to a shader:• In-line source code• External shader source code• Precompiled shader programs on page 6-15.6.5.1 In-line source codeExample 6-16 shows:• how to define shaders source code in text strings• using createShader() to compile the shader source code• using createProgram() to create a program from the object code• using setProgram() to assign the program to the context.Example 6-16 Specifying the attributes for the vertex source elements...const char* vertexsource ="attribute vec4 POSITION; \attribute vec4 COLOR;\varying vec4 col;\void main(void)\{\col = COLOR;\gl_Position = POSITION;\}";const char* fragmentsource ="precision mediump float; \varying vec4 col;\void main(void)\{\gl_FragColor = col;\}";Managed vertexshader =context->createShader(GL_VERTEX_SHADER, vertexsource);Managed fragmentshader =context->createShader(GL_FRAGMENT_SHADER, fragmentsource);Managed program = context->createProgram(vertexshader, fragmentshader);context->setProgram(program);...6.5.2 External shader source codeExample 6-17 shows loading the shader source code from two files:Example 6-17 Loading the hello_world shaders...Managed filesystem = system->createFileSystem(".");Proxy proxy(filesystem, context);Program *helloWorldProgram =ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 6-14ID070710Non-Confidential - Draft - Beta