Mali GPU User Interface Engine Application Development Guide

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Tutorial on the Lotion User Interface Classes5.4.2 Modified startup code in lightshow.cppThe original lighshow.cpp file in ...\example_applications\lightshow is not the same as the onein ...\lotion\applets\lightshow:• the standalone application is converted to a be a class• additional code is added to interface with the theme and application classes.The modified lightshow.cpp file uses the header file and the Lotion namespaces as shown in :Example 5-20 Namespace for lightshow// add reference to new header file#include "lightshow.h"// remove low-level includesusing namespace MDE;namespace Lotion // use Lotion namespace{namespace Applets // use Applets namespace{...}}The first part of lightshow.cpp file is similar to the original, except that some widget code hasbeen added as shown in Example 5-21:Example 5-21 Functions in lightshow.cpp// same as original except now class methodvoid LightShow::prepareFlares(Context* context, MDE::Program* p){float texcoords[] = { 0, 0, 1, 0, 1, 1, 0, 1 };flareTexcoord = context->createBuffer(GL_ARRAY_BUFFER,sizeof(texcoords), 8);flareTexcoord->setData(0, sizeof(texcoords), texcoords);flareTexcoordsLoc = p->getAttribLocation(TEXCOORD0);}// same as original except now class methodvoid LightShow::drawFlare(Context* context, vec3 position, vec3 color, float size){context->setUniform("position", position);context->setUniform("color", color);context->setUniform("size", size);glEnableVertexAttribArray(flareTexcoordsLoc);glBindBuffer(GL_ARRAY_BUFFER, flareTexcoord->getHandle());glVertexAttribPointer(flareTexcoordsLoc, 2, GL_FLOAT, GL_FALSE, 0, 0);unsigned short indices[] = { 0, 1, 2, 0, 2, 3 };glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);}glDisableVertexAttribArray(flareTexcoordsLoc);ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 5-26ID070710Non-Confidential - Draft - Beta
Tutorial on the Lotion User Interface Classes// same as original except now class methodvoid LightShow::traverseTransform(Tree* node,mat4 parentTransform, float time){if (!node)return;traverseTransform(node->getNextSibling(), parentTransform, time);if (node->data) {mat4 localTransform = node->data->sampleLocalTransform(time);parentTransform = localTransform * parentTransform;node->data->setAbsoluteTransform(parentTransform);}traverseTransform(node->getFirstChild(), parentTransform, time);}// same as original except now class methodvoid LightShow::applyMaterial(MaterialAsset* m, Context* context){if (m) {if (m->commonMaps.diffuse)context->setUniformSampler("diffuseMap",m->commonMaps.diffuse->getTexture());if (m->commonMaps.bump) {Texture* t = m->commonMaps.bump->getTexture();context->setUniformSampler("normalMap", t);}}}if (m->commonMaps.spec_level)context->setUniformSampler("glossMap",m->commonMaps.spec_level->getTexture());5.4.3 Changes to traverseDraw()The traverseDraw() function is the same except for the namespace and the addition of a loopthrough the batches. See Example 5-22:Example 5-22 traverseDraw() function// now class method and display options configurable by radio buttonsvoid LightShow::traverseDraw(Tree* node, Context* context) {if (!node)return;traverseDraw(node->getNextSibling(), context);if (node->data){mat4 world = node->data->getAbsoluteTransform();context->setUniformMatrix("WORLD", world);mat4 inv_trans_world = world.transposed();inv_trans_world.invert(inv_trans_world);context->setUniformMatrix("INV_TRANS_WORLD", inv_trans_world);// new for applet, loop through batchesfor (unsigned int i = 0; i < node->data->getBatchCount(); i++){Batch b = node->data->getBatch(i);ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 5-27ID070710Non-Confidential - Draft - Beta
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MaliGPU User Interface EngineVersio
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ContentsMali GPU User Interface Eng
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List of TablesMali GPU User Interfa
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List of FiguresFigure 4-17 Environm
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PrefaceAbout this bookThis is the M
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PrefaceFeedbackARM welcomes feedbac
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Introduction1.1 About the Mali GPU
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IntroductionProxygetLoader()LoaderA
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Chapter 2Tutorial on the System Cla
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Tutorial on the System Classes2.2 C
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Tutorial on the System ClassesFigur
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Tutorial on the System ClassesDrawi
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Chapter 3Tutorial on Drawing 2D Sha
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Tutorial on Drawing 2D Shapes...con
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Tutorial on Drawing 2D ShapesFor ea
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Tutorial on Drawing 2D ShapesExampl
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Tutorial on Drawing 2D ShapesFigure
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Tutorial on Drawing 3D Shapes4.1 Dr
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Tutorial on Drawing 3D Shapes4.2 Co
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Mali GPU User Interface Engine Application Development Guide

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