OpenGL 3'0

1
OpenGL 3.0

• Use only as directed. These are the opinions
  of two ARB member companies and may not reflect
  the opinions of the ARB as a whole. Not
  available in all areas. Void where prohibited.
  Specs not included.

2
Motivation

• OpenGL has matured over 13 years
• OpenGL not always representative of hardware
  anymore
• Fully backwards compatible (not so for the other
  graphics API)
• Significant new hardware functionality coming
• Programmability just at the beginning of its
  potential
• OpenGL is the API to expose this all
• OpenGL needs to be market and timeline driven
• Provide only what is actually needed
• Provide it on time

3
ISV Road Tour
4
A Tale of Two Profiles
Full OpenGL 3.x Application
Layered 3.x functionality
OpenGL LM 3.x Application
Full Profile
Core OpenGL 3.x functionality
Core OpenGL 3.x functionality
Lean Mean Profile
5
Layered Features

• Immediate Mode
• Fixed functionality vertex processing
• Transform
• Lighting
• Fixed functionality fragment processing
• Texturing
• Fogging
• GLSL built-in variables
• Color index rendering
• Accumulation buffer
• Evaluators
• Selection
• Feedback

6
Implications of LM Profile

• Put most effort in moving OpenGL LM profile
  forward
• Some new features will only be supported here
• We would like you to migrate to LM in your
  application
• Can still get to all functionality using the full
  OpenGL profile
• Both profiles aimed at desktop and workstation
  market
• Pick what suits you best
• Foundation for cross-platform gaming and
  authoring
• OpenGL ES next version could be derived from
  OpenGL LM profile
• Aimed at embedded markets
• Console market could take snapshot for its use

7
OpenGL LM Benefits

• Higher performance
• Removes software layer between application and
  hardware
• Is where most innovation will happen
• Some new functionality will also be available in
  the full profile
• Higher quality drivers
• Simpler code, less bugs
• Less ways to achieve the same effect
• fast paths are clear
• Dont have to compromise new features
• To fit in with existing features
• Simplify extension process

8
Usability and Performance

• Better error handling
• Callback mechanism can set breakpoint!
• More error codes
• More general InfoLog for all GL state human
  readable
• Performance counters
• Debugging hooks
• Logging events
• Validate state combinations
• Ability to determine in advance if all state is
  sane
• Performance mode
• Suppression of error checking
• Suppression of GL state mirroring especially
  for current vertex state