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Diffstat (limited to 'mesalib/docs/specs/MESA_shader_integer_mix.spec')
-rw-r--r-- | mesalib/docs/specs/MESA_shader_integer_mix.spec | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/mesalib/docs/specs/MESA_shader_integer_mix.spec b/mesalib/docs/specs/MESA_shader_integer_mix.spec deleted file mode 100644 index d381ddd43..000000000 --- a/mesalib/docs/specs/MESA_shader_integer_mix.spec +++ /dev/null @@ -1,135 +0,0 @@ -Name - - MESA_shader_integer_mix - -Name Strings - - GL_MESA_shader_integer_mix - -Contact - - Matt Turner (matt.turner 'at' intel.com) - -Contributors - - Matt Turner, Intel - Ian Romanick, Intel - -Status - - Shipping - -Version - - Last Modified Date: 09/09/2013 - Author Revision: 5 - -Number - - - -Dependencies - - OpenGL 3.0 or OpenGL ES 3.0 is required. This extension interacts with - GL_ARB_ES3_compatibility. - - This extension is written against the OpenGL 4.4 (core) specification - and the GLSL 4.40 specification. - -Overview - - GLSL 1.30 (and GLSL ES 3.00) expanded the mix() built-in function to - operate on a boolean third argument that does not interpolate but - selects. This extension extends mix() to select between int, uint, - and bool components. - -New Procedures and Functions - - None. - -New Tokens - - None. - -Additions to Chapter 8 of the GLSL 4.40 Specification (Built-in Functions) - - Modify Section 8.3, Common Functions - - Additions to the table listing common built-in functions: - - Syntax Description - --------------------------- -------------------------------------------------- - genIType mix(genIType x, Selects which vector each returned component comes - genIType y, from. For a component of a that is false, the - genBType a) corresponding component of x is returned. For a - genUType mix(genUType x, component of a that is true, the corresponding - genUType y, component of y is returned. - genBType a) - genBType mix(genBType x, - genBType y, - genBType a) - -Additions to the AGL/GLX/WGL Specifications - - None. - -Modifications to The OpenGL Shading Language Specification, Version 4.40 - - Including the following line in a shader can be used to control the - language features described in this extension: - - #extension GL_MESA_shader_integer_mix : <behavior> - - where <behavior> is as specified in section 3.3. - - New preprocessor #defines are added to the OpenGL Shading Language: - - #define GL_MESA_shader_integer_mix 1 - -Interactions with ARB_ES3_compatibility - - On desktop implementations that support ARB_ES3_compatibility, - GL_MESA_shader_integer_mix can be enabled (and the new functions - used) in shaders declared with '#version 300 es'. - -GLX Protocol - - None. - -Errors - - None. - -New State - - None. - -New Implementation Dependent State - - None. - -Issues - - 1) Should we allow linear interpolation of integers via a non-boolean - third component? - - RESOLVED: No. - - 2) Should we allow mix() to select between boolean components? - - RESOLVED: Yes. Implementing the same functionality using casts would be - possible but ugly. - -Revision History - - Rev. Date Author Changes - ---- -------- -------- --------------------------------------------- - 5 09/09/2013 idr Add ARB_ES3_compatibility interaction. - - 4 09/06/2013 mattst88 Allow extension on OpenGL ES 3.0. - - 3 08/28/2013 mattst88 Add #extension/#define changes. - - 2 08/26/2013 mattst88 Change vendor prefix to MESA. Add mix() that - selects between boolean components. - 1 08/26/2013 mattst88 Initial revision |