Mali GPU User Interface Engine Application Development Guide

Tutorial on Drawing 2D Shapes5. The second element in the elements array is defined, and the semantic attribute is TECOORD0.See Example 3-3 on page 3-3:Example 3-17 Setting VertexElement to use a texture...VertexElement elements[2];elements[0].components = 2;elements[0].offset = 0;elements[0].semantic = POSITION;elements[0].stream = 0;elements[0].type = GL_FLOAT;elements[1].components = 2;elements[1].offset = 2*sizeof(GLfloat);elements[1].semantic = TEXCOORD0;elements[1].stream = 0;elements[1].type = GL_FLOAT;// xy position// this element is the vertices for the shapes// uv position// this element is texture information...Managed vertexDeclaration = context->createVertexDeclaration(elements, 2);context->setVertexDeclaration(vertexDeclaration);6. The shape and texture have been defined, so draw the shape as shown in Example 3-18.Example 3-18 Draw a shape with a custom texture...do{glClearColor(1.0f, 0.0f, 0.0f, 1.0f);glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );context->setVertexBuffer(0, vertexBuffer);/** When dealing with 2D textures and shaders, we need to assign the texture to a sampler.*/context->setUniformSampler("texture", (Texture*)checkerBoard);context->drawArrays( GL_TRIANGLES, 0, 2 );if(keyboard->getSpecialKeyState(Keyboard::KEY_ESCAPE)) break;}while( context->update() );}}catch(Exception& e){printf("MDE Exception: \n%s\n\n",e.getMessage().getCharString());}7. Figure 3-5 on page 3-14 shows the shape with its texture:ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 3-13ID070710Non-Confidential - Draft - Beta