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Advanced Graphics Workshop - Texas Instruments GFX2011 Dec 3rd 2011 Bangalore

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Prabindh Sundareson
Prabindh Sundareson

The document outlines the agenda for an Advanced Graphics Workshop being held by Texas Instruments. The workshop will include an introduction to graphics hardware architectures and the OpenGL rendering pipeline. It will provide a detailed walkthrough of the OpenGL ES 2.0 specification and APIs. Participants will work through several hands-on labs covering texturing, transformations, shaders and more. The goal is to help developers optimize graphics performance on embedded platforms.

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Advanced Graphics Workshop - Prabindh Sundareson, Texas Instruments GFX2011 Dec 3 rd 2011 Bangalore Note: This slide set is a public version of the actual slides presented at the workshop
GFX2011 8.30 AM [Registration and Introduction, Equipment setup] 9.00 AM Why Graphics ? Present and Future – Prof. Vijay Natarajan, Assistant Professor, Department of Computer Science and Automation, IISc, Bangalore 9.45 AM Introduction to the OpenGL/ES Rendering pipeline, and algorithms Detailed walkthrough of the OpenGL ES2.0 spec and APIs – Part 1 1.00 PM [Lunch] Detailed walkthrough of the OpenGL ES2.0 spec and APIs – Part 2 - Break - Framework and platform integration - EGL, Android (SurfaceFlinger) Tools for performance benchmarking, and Graphics Development Q&A, Certificate presentation to participants – Networking
Detailed Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GPU HW Architectures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GPU integrated SOCs ,[object Object],CPU size ~= GPU size
Integrated GPU architectures (Samsung SRP) From – Khronos presentation
Vivante GPU Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],From - http://www.socip.org/socip/speech/pdf/2-Vivante-SoCIP%202011%20Presentation.pdf Spec evolution
OpenGL specification evolution Reading the spec
A note on reading the GLES specifications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Extensions
What are Extensions ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Dependencies
OpenGL Dependencies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],GL vs ES
OpenGL 2.0 vs OpenGL ES2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],GLES API
The OpenGL ES API ,[object Object],[object Object],[object Object],[object Object],[object Object],Client server
The GL Client – Server Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],GL,SL, EGL spec versions
OpenGL Specifications OPENGL Full version ES version Common Common-Lite GLSL companion GLSL-ES companion What we miss in ES compared to desktop version: Polygons, Display lists, Accumulation buffers,… Currently in 4.0+ Currently in 2.0 Currently in 1.0.16 Currently in 1.20 EGL Currently in 1.3 Core GL Spec Shader Spec Platform Integration EGL Currently in 1.3 Programming Flow
Programming in OpenGL / ES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Frames/vertex/basics
Preliminaries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Frame switch (Uniform) Driver frame draw (non-uniform) Real frame switch happens here Triangles
Why Triangles ? ,[object Object],+ + ??? pipeline
ES2.0 Pipeline What do the APIs look like ? …
The GLES API – Overall view Global Platform Management Vertex Operations Texture Operations Shader Operations Rendering Operations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],State Management ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Context Management ,[object Object],[object Object],[object Object],EGL GL
Starting on the GPU
Flush, and Finish ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A note on WebGL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Programming ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Below link contains introductory video for starting the labs: http://www.youtube.com/watch?v=TM6t2ev9MHk
Texturing
A note on Binding, Buffer Objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Correct approach of data transfers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Texturing basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Uv mapping
Texturing 3D objects ,[object Object],[object Object],[object Object],[object Object],compression
Texture Compression types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],KTX
Khronos KTX file format ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
KTX format … Passing coords
Texture coordinates to GPU ,[object Object],[object Object],WebGL/Textures
Note on WebGL and Textures ,[object Object],[object Object],[object Object],Programming
Programming with Textures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Note on the lab hints ,[object Object],[object Object]
Lab 94 – Texturing (Keys to remove errors) ,[object Object],[object Object],[object Object],[object Object]
Vertices, Transformations
What are vertices ? ,[object Object],[object Object],[object Object]
Vertex operations ,[object Object],[object Object],[object Object],[object Object],Attributes
Vertex Attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],CPU to GPU xfer
Vertices – CPU to GPU ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cartesian
Translation ,[object Object],X = 0 X = 0.4  Translation applied to all objects (effect is not dependent on depth of object)
Rotation x y z Rotation  Observe effect of x offset! Refresh M,V,P after every rotate -0 Lookat
Getting the eye to see the object ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Viewport
Viewport Transformation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],HW optimisations
Summary - The Transformation Sequence Translation example mathematical step - w
HW Optimisations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Programming
Programming ! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lab 913 – Keys for “Eyeing the eyes” ,[object Object],[object Object],[object Object],[object Object]
Real life 3D models
Real-life modelling of objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Programming ,[object Object],[object Object],[object Object],[object Object],[object Object]
Shaders
Vertices, Fragments - Revisited ,[object Object],[object Object],[object Object],[object Object],[object Object],Shader characteristics
Shader characteristics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Inputs to shader
Inputs to the Shaders ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Shader types
Fragment Shaders ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Sample Frag shader
Program ,[object Object],[object Object],Precision
Advanced Shaders ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Programming with Shaders ,[object Object],[object Object],[object Object],[object Object],[object Object]
Lab 96 – Keys for “Squishing the slice” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rendering Targets
Rendering Targets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Need
Need for offscreen rendering ,[object Object],[object Object],[object Object],[object Object],[object Object],FBO
FrameBuffer Object ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],rtt
Render-To-Texture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],APIs
Post-processing operations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],programming
Programming FBO and back to Fb ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Programming ,[object Object],[object Object],[object Object],[object Object]
Lab 910 – Keys for “Render to Texture” lab ,[object Object],[object Object],[object Object],[object Object]
Platform Integration
Setting up the platform - EGL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Android
Android Integration Details ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Surfaceflinger
Android SurfaceFlinger architecture ,[object Object],[object Object],[object Object],[object Object],composition
Optimising OpenGL / ES applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],debugging
Debugging OpenGL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Appendix: Video and Graphics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Q & A, Feedback ,[object Object],[object Object]

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Advanced Graphics Workshop - Texas Instruments GFX2011 Dec 3rd 2011 Bangalore

  • 1. Advanced Graphics Workshop - Prabindh Sundareson, Texas Instruments GFX2011 Dec 3 rd 2011 Bangalore Note: This slide set is a public version of the actual slides presented at the workshop
  • 2. GFX2011 8.30 AM [Registration and Introduction, Equipment setup] 9.00 AM Why Graphics ? Present and Future – Prof. Vijay Natarajan, Assistant Professor, Department of Computer Science and Automation, IISc, Bangalore 9.45 AM Introduction to the OpenGL/ES Rendering pipeline, and algorithms Detailed walkthrough of the OpenGL ES2.0 spec and APIs – Part 1 1.00 PM [Lunch] Detailed walkthrough of the OpenGL ES2.0 spec and APIs – Part 2 - Break - Framework and platform integration - EGL, Android (SurfaceFlinger) Tools for performance benchmarking, and Graphics Development Q&A, Certificate presentation to participants – Networking
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  • 6. Integrated GPU architectures (Samsung SRP) From – Khronos presentation
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  • 15. OpenGL Specifications OPENGL Full version ES version Common Common-Lite GLSL companion GLSL-ES companion What we miss in ES compared to desktop version: Polygons, Display lists, Accumulation buffers,… Currently in 4.0+ Currently in 2.0 Currently in 1.0.16 Currently in 1.20 EGL Currently in 1.3 Core GL Spec Shader Spec Platform Integration EGL Currently in 1.3 Programming Flow
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  • 19. ES2.0 Pipeline What do the APIs look like ? …
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  • 44. Rotation x y z Rotation  Observe effect of x offset! Refresh M,V,P after every rotate -0 Lookat
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  • 47. Summary - The Transformation Sequence Translation example mathematical step - w
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