book

OpenGL ES 3.0 Programming Guide, Second Edition

Name: OpenGL ES 3.0 Programming Guide, Second Edition
ISBN: 9780133440133

by Dan Ginsburg, Budirijanto Purnomo, Dave Shreiner, Aaftab Munshi

March 2014

Intermediate to advanced

560 pages

14h 7m

English

Addison-Wesley Professional

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About This eBook
Title Page
Copyright Page
Praise for OpenGL® ES™ 3.0 Programming Guide, Second Edition
Contents
List of Figures
List of Examples
List of Tables
Foreword
Preface
Intended AudienceOrganization of This BookExample Code and ShadersErrata

Acknowledgments
About the Authors
Chapter 1. Introduction to OpenGL ES 3.0
OpenGL ES 3.0What’s New in OpenGL ES 3.0OpenGL ES 3.0 and Backward CompatibilityEGLEGL Command SyntaxOpenGL ES Command SyntaxError HandlingBasic State ManagementFurther Reading
Chapter 2. Hello Triangle: An OpenGL ES 3.0 Example
Code FrameworkWhere to Download the ExamplesHello Triangle ExampleUsing the OpenGL ES 3.0 FrameworkCreating a Simple Vertex and Fragment ShaderCompiling and Loading the ShadersCreating a Program Object and Linking the ShadersSetting the Viewport and Clearing the Color BufferLoading the Geometry and Drawing a PrimitiveDisplaying the Back BufferSummary
Chapter 3. An Introduction to EGL
Communicating with the Windowing SystemChecking for ErrorsInitializing EGLDetermining the Available Surface ConfigurationsQuerying EGLConfig AttributesLetting EGL Choose the ConfigurationCreating an On-Screen Rendering Area: The EGL WindowCreating an Off-Screen Rendering Area: EGL PbuffersCreating a Rendering ContextMaking an EGLContext CurrentPutting All Our EGL Knowledge TogetherSynchronizing RenderingSummary
Chapter 4. Shaders and Programs
Shaders and ProgramsUniforms and AttributesShader CompilerProgram BinariesSummary
Chapter 5. OpenGL ES Shading Language
OpenGL ES Shading Language BasicsShader Version SpecificationVariables and Variable TypesVariable ConstructorsVector and Matrix ComponentsConstantsStructuresArraysOperatorsFunctionsBuilt-In FunctionsControl Flow StatementsUniformsUniform BlocksVertex and Fragment Shader Inputs/OutputsInterpolation QualifiersPreprocessor and DirectivesUniform and Interpolator PackingPrecision QualifiersInvarianceSummary
Chapter 6. Vertex Attributes, Vertex Arrays, and Buffer Objects
Specifying Vertex Attribute DataDeclaring Vertex Attribute Variables in a Vertex ShaderVertex Buffer ObjectsVertex Array ObjectsMapping Buffer ObjectsCopying Buffer ObjectsSummary
Chapter 7. Primitive Assembly and Rasterization
PrimitivesDrawing PrimitivesPrimitive AssemblyRasterizationOcclusion QueriesSummary
Chapter 8. Vertex Shaders
Vertex Shader OverviewVertex Shader ExamplesGenerating Texture CoordinatesVertex SkinningTransform FeedbackVertex TexturesOpenGL ES 1.1 Vertex Pipeline as an ES 3.0 Vertex ShaderSummary
Chapter 9. Texturing
Texturing BasicsCompressed TexturesTexture Subimage SpecificationCopying Texture Data from the Color BufferSampler ObjectsImmutable TexturesPixel Unpack Buffer ObjectsSummary
Chapter 10. Fragment Shaders
Fixed-Function Fragment ShadersFragment Shader OverviewImplementing Fixed-Function Techniques Using ShadersSummary
Chapter 11. Fragment Operations
BuffersFragment Tests and OperationsBlendingDitheringMultisampled Anti-AliasingReading and Writing Pixels to the FramebufferMultiple Render TargetsSummary
Chapter 12. Framebuffer Objects
Why Framebuffer Objects?Framebuffer and Renderbuffer ObjectsCreating Framebuffer and Renderbuffer ObjectsUsing Renderbuffer ObjectsUsing Framebuffer ObjectsFramebuffer BlitsFramebuffer InvalidationDeleting Framebuffer and Renderbuffer ObjectsExamplesPerformance Tips and TricksSummary
Chapter 13. Sync Objects and Fences
Flush and FinishWhy Use a Sync Object?Creating and Deleting a Sync ObjectWaiting for and Signaling a Sync ObjectExampleSummary
Chapter 14. Advanced Programming with OpenGL ES 3.0
Per-Fragment LightingEnvironment MappingParticle System Using Transform FeedbackImage PostprocessingProjective TexturingNoise Using a 3D TextureProcedural TexturingRendering Terrain with Vertex Texture FetchShadows Using a Depth TextureSummary
Chapter 15. State Queries
OpenGL ES 3.0 Implementation String QueriesQuerying Implementation-Dependent LimitsQuerying OpenGL ES StateHintsEntity Name QueriesNonprogrammable Operations Control and QueriesShader and Program State QueriesVertex Attribute QueriesTexture State QueriesSampler QueriesAsynchronous Object QueriesSync Object QueriesVertex Buffer QueriesRenderbuffer and Framebuffer State QueriesSummary
Chapter 16. OpenGL ES Platforms
Building for Microsoft Windows with Visual StudioBuilding for Ubuntu LinuxBuilding for Android 4.3+ NDK (C++)Building for Android 4.3+ SDK (Java)Building for iOS 7Summary
Appendix A. GL_HALF_FLOAT
16-Bit Floating-Point NumberConverting a Float to a Half-Float
Appendix B. Built-In Functions
Angle and Trigonometry FunctionsExponential FunctionsCommon FunctionsFloating-Point Pack and Unpack FunctionsGeometric FunctionsMatrix FunctionsVector Relational FunctionsTexture Lookup FunctionsFragment Processing Functions
Appendix C. ES Framework API
Framework Core FunctionsTransformation Functions
Index

Content preview from OpenGL ES 3.0 Programming Guide, Second Edition

Appendix A. GL_HALF_FLOAT

GL_HALF_FLOAT is a vertex and texture data type supported by OpenGL ES 3.0. The GL_HALF_FLOAT data type is used to specify 16-bit floating-point values. This can be useful, for example, in specifying vertex attributes such as texture coordinates,normals,binormals, and tangent vectors. Using GL_HALF_FLOAT rather than GL_FLOAT provides a two times reduction in memory bandwidth required to read vertex or texture data by the GPU.

One might argue that we can use GL_SHORT or GL_UNSIGNED_SHORT instead of a 16-bit floating-point data type and get the same memory footprint and bandwidth savings. However, with that approach, you will need to scale the data or matrices appropriately and apply a transform in the vertexshader. For ...

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OpenGL ES 3.0 Programming Guide, Second Edition

by Dan Ginsburg, Budirijanto Purnomo, Dave Shreiner, Aaftab Munshi

Appendix A. GL_HALF_FLOAT

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