Name IMG_read_format Name Strings GL_IMG_read_format Notice Copyright Imagination Technologies Limited, 2005, 2008. Contact Imagination Technologies (devtech 'at' imgtec 'dot' com) Status Complete Version Version 1.0 Number OpenGL ES Extension #53 Dependencies GL_OES_read_format is required The extension is written against the OpenGLES 1.0 Specification, which in turn is based OpenGL 1.3. Thus this spec is effectively written against OpenGL 1.3 but does not address sections explicitly removed or reduced by OpenGL-ES 1.0. Overview This extension is intended to supplement the GL_OES_read_format extension by adding support for more format/type combinations to be used when calling ReadPixels. ReadPixels currently accepts one fixed format/type combination (format RGBA and type UNSIGNED_BYTE) for portability, and an implementation specific format/type combination queried using the tokens IMPLEMENTATION_COLOR_READ_FORMAT_OES and IMPLEMENTATION_COLOR_READ_TYPE_OES (GL_OES_read_format extension). This extension adds the following format/type combinations to those currently allowed to be returned by GetIntegerV: format type ------ ---- BGRA_IMG UNSIGNED_BYTE BGRA_IMG UNSIGNED_SHORT_4_4_4_4_REV_IMG E.g. Calling GetIntegerv with a parameter of IMPLEMENTATION_COLOR_READ_FORMAT_OES can now return BGRA, with the corresponding call to GetIntegerv using a parameter of IMPLEMENTATION_COLOR_READ_TYPE_OES returning UNSIGNED_BYTE; IP Status Unknown Issues None. New Procedures and Functions None. New Tokens Accepted by the parameter of ReadPixels: GL_BGRA_IMG 0x80E1 GL_UNSIGNED_SHORT_4_4_4_4_REV_IMG 0x8365 Additions to Chapter 2 of the OpenGL 1.3 Specification (OpenGL Operation) None Additions to Chapter 3 of the OpenGL 1.3 Specification (Rasterization) None Additions to Chapter 4 of the OpenGL 1.3 Specification (Per-Fragment Operations and the Frame Buffer) None Additions to Chapter 5 of the OpenGL 1.3 Specification (Special Functions) None Additions to Chapter 6 of the OpenGL 1.3 Specification (State and State Requests) None Errors None New State None New Implementation Dependent State None Revision History 1.0, 10/04/2008 gdc: Tidied for publication. 0.2, 25/07/2005 sks: Added 4444. 0.1, 18/04/2005 sks: Initial revision.