https://github.com/davidandreoletti/libegl

Khronos EGL 1.4 for iOS
https://github.com/davidandreoletti/libegl

Last synced: 18 days ago
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Khronos EGL 1.4 for iOS

• Host: GitHub
• URL: https://github.com/davidandreoletti/libegl
• Owner: davidandreoletti
• License: other
• Created: 2014-03-24T14:27:18.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-04-06T03:25:47.000Z (over 10 years ago)
• Last Synced: 2024-07-31T22:56:37.994Z (3 months ago)
• Language: C
• Homepage:
• Size: 1.04 MB
• Stars: 27
• Watchers: 5
• Forks: 9
• Open Issues: 2
• Metadata Files:
  • Readme: README-DEV.md
  • Changelog: CHANGELOG.md

Awesome Lists containing this project

README

        
# Bug/Feature Lists

## TODO LibEGL Bug Priority List:

    - None yet :)

## TODO LibEGL Feature Priority List:

    - Add EGL_SWAP_BEHAVIOR_PRESERVED_BIT support. See EGL 1.4 Table 3.2

      Surface swap is EGL_BUFFER_DESTROYED for now ? See iOS support EGL_BUFFER_RETAINED via kEAGLDrawablePropertyRetainedBacking too

    - Add support for rotation. See EGL 1.4 - Section 3.9.1 Native Window Resizing

    - Add support for Multisampling

## TODO Uncategorised List:

    - Memory Leak: App starts with 8.5Mb without EGL. Running the demo + unit test consumes more 16Mb. When the demo stops, the memory consumption is higher than 8.5Mb. Some resources are not deleted

    - Split Samples from UT Xcode projects 

    - Can add support for GLKView (currently only CEAGLLayer supported) ?

## TODO Code Cleanup Priority List:

    - None. 

## TODO Unit Test Bug Priority List:

    - None yet :)

# PERSONAL NOTES:

    EGL:  several types of drawing surfaces collectively referred to as EGLSurfaces;

    - windows, used for onscreen rendering; 

    - pbuffers, used for offscreen rendering; 

    - pixmaps, used for offscreen rendering into buffers that may be accessed through native APIs. 

        

    EGL windows and pixmaps are tied to native window system windows and pixmaps

        

    db-blog:

    EGLDisplay = the UIWindow holding our custom view 

    EGLSurface = window surf: CAEAGLayer's attached to a sub-class from UIView 

             pbuffer surf (block of memory dynamically allocated on the graphics card, but not visible on-screen): OpenGL's Framebuffer Objects -> See https://developer.apple.com/library/ios/documentation/3ddrawing/conceptual/opengles_programmingguide/WorkingwithEAGLContexts/WorkingwithEAGLContexts.html#//apple_ref/doc/uid/TP40008793-CH103-SW6

             pixmap surf ( uses whatever pixel buffer representation is supported by the platform’s native graphics API (in the case of Android, this would be a Bitmap), allowing you to mix and match OpenGL and native graphics drawing calls into the same pixels without having to copy buffers back and forth): CGContextRef from Quartz 2D

    http://android-dls.com/wiki/index.php?title=EGL_notes  - About offscreen rendering

    http://www.slideshare.net/llopis/the-best-of-both-worlds-mixing-uikit-with-opengl 

    http://gamesfromwithin.com/remixing-opengl-and-uikit

    https://developer.tizen.org/help/index.jsp?topic=%2Forg.tizen.native.appprogramming%2Fhtml%2Fguide%2Fgraphics%2Fopengl.htm