Mali GPU User Interface Engine Application Development Guide

Tutorial on Constructing Custom ShadersUsing files in Mali Binary Format improves efficiency and separates graphic creation fromgraphic display:1. To load asset files, create a Proxy object for the directory containing the assets. SeeExample 6-5:Example 6-5 Creating a proxyManaged system = create_system_backend();Managed filesystem = system->createFileSystem("data/");Proxy proxy(filesystem, context);2. Example 6-6 shows the code that loads the assets from the directory:Example 6-6 Loading assets from a proxy// load the scene from the asset fileSceneAsset* scene = proxy.getSceneAsset("superpot.MBA");// load the shader programsProgram* program = proxy.getProgramAsset("default.vert;default.frag")->getProgram();context->setProgram(program);// Access parts of the scene by name or idconst char* exName = "Teapot01-mesh";GeometryAsset* mesh = (GeometryAsset*)scene->getAsset(Asset::TYPE_GEOMETRY, exName);3. The draw loop reads the geometry assets from the file and updates the context as shownin Example 6-7:Example 6-7 Redrawing geometries from the assetfor(unsigned int i = 0; i < scene->getAssetCount(Asset::TYPE_GEOMETRY); i++){// set the drawing options...// calculate the camera position, world, view, and perspective projection...// set the uniform values to pass to the shaderscontext->setUniformMatrix("WORLD", 4, 1, world);context->setUniformMatrix("VIEW", 4, 1, view);context->setUniformMatrix("PROJECTION", 4, 1, proj);context->setUniformMatrix("PROJ_VIEW", 4, 1, proj*view);// tell the scene asset to draw itself((GeometryAsset*)scene->getAsset(Asset::TYPE_GEOMETRY, i))->draw();}// update the context to switch the buffers and display the drawingcontext->update();For more information on the Mali Binary Format, see the Mali GPU Binary Asset Exporter UserGuide.ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 6-9ID070710Non-Confidential - Draft - Beta