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magnum/src/Magnum/Shaders/compatibility.glsl

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Relicensing to MIT/Expat license, part 3: source files. Added license header also to shader sources. Hopefully it won't harm compilation times too much.
13 years ago
/*
This file is part of Magnum.
Updated copyright year.
6 years ago
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
Updated copyright year.
4 years ago
2020, 2021, 2022 Vladimír Vondruš <mosra@centrum.cz>
Relicensing to MIT/Expat license, part 3: source files. Added license header also to shader sources. Hopefully it won't harm compilation times too much.
13 years ago
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
Blind port of PhongShader to OpenGL ES 2.0.
14 years ago
#if (!defined(GL_ES) && __VERSION__ >= 130) || (defined(GL_ES) && __VERSION__ >= 300)
Shaders: better preprocessor code formatting.
13 years ago
#define NEW_GLSL
Blind port of PhongShader to OpenGL ES 2.0.
14 years ago
#endif
Shader: more robust extension presence checking. Propagate the information about whether given extension is disabled to GLSL instead of doing the guesswork again from scratch.
12 years ago
#if !defined(GL_ES) && defined(GL_ARB_explicit_attrib_location) && !defined(DISABLE_GL_ARB_explicit_attrib_location)
#extension GL_ARB_explicit_attrib_location: enable
#define EXPLICIT_ATTRIB_LOCATION
#endif
#if !defined(GL_ES) && defined(GL_ARB_shading_language_420pack) && !defined(DISABLE_GL_ARB_shading_language_420pack)
Allow shader layout qualifiers only with GLSL 1.40 (GL 3.1) and above. Even if the extension specification describes the minimum required version as GL 2.1 (or doesn't mention it at all), most compilers can't handle `layout(...)` before input/output declaration. These drivers mark the extensions as supported on GL < 3.1, but then can't handle them at all: Mesa fails to compile it with GLSL 1.20, NVidia fails with GLSL 1.30. Also updated `EXPLICIT_*` defines in Shaders/compatibility.glsl to reflect this change.
13 years ago
#extension GL_ARB_shading_language_420pack: enable
#define RUNTIME_CONST
Shaders: EXPLICIT_TEXTURE_LAYER is very misleading. I went through renaming this on many places quite some time ago, but this one slipped through. Now that UBOs will be a thing, rename to EXPLICIT_BINDING instead of EXPLICIT_UNIFORM_BINDING.
5 years ago
#define EXPLICIT_BINDING
Allow shader layout qualifiers only with GLSL 1.40 (GL 3.1) and above. Even if the extension specification describes the minimum required version as GL 2.1 (or doesn't mention it at all), most compilers can't handle `layout(...)` before input/output declaration. These drivers mark the extensions as supported on GL < 3.1, but then can't handle them at all: Mesa fails to compile it with GLSL 1.20, NVidia fails with GLSL 1.30. Also updated `EXPLICIT_*` defines in Shaders/compatibility.glsl to reflect this change.
13 years ago
#endif
Shader: more robust extension presence checking. Propagate the information about whether given extension is disabled to GLSL instead of doing the guesswork again from scratch.
12 years ago
#if !defined(GL_ES) && defined(GL_ARB_explicit_uniform_location) && !defined(DISABLE_GL_ARB_explicit_uniform_location)
#extension GL_ARB_explicit_uniform_location: enable
#define EXPLICIT_UNIFORM_LOCATION
Blind port of PhongShader to OpenGL ES 2.0.
14 years ago
#endif
#if defined(GL_ES) && __VERSION__ >= 300
Shaders: better preprocessor code formatting.
13 years ago
#define EXPLICIT_ATTRIB_LOCATION
Shaders: EXPLICIT_TEXTURE_LAYER is very misleading. I went through renaming this on many places quite some time ago, but this one slipped through. Now that UBOs will be a thing, rename to EXPLICIT_BINDING instead of EXPLICIT_UNIFORM_BINDING.
5 years ago
/* EXPLICIT_BINDING, EXPLICIT_UNIFORM_LOCATION and RUNTIME_CONST is not
Shaders: better preprocessor code formatting.
13 years ago
available in OpenGL ES */
Blind port of PhongShader to OpenGL ES 2.0.
14 years ago
#endif
Shaders: another iteration in porting of Phong and Flat shaders to GLES. Hope the reduced precision won't hurt.
14 years ago
/* Precision qualifiers are not supported in GLSL 1.20 */
#if !defined(GL_ES) && __VERSION__ == 120
Shaders: better preprocessor code formatting.
13 years ago
#define highp
#define mediump
#define lowp
Shaders: another iteration in porting of Phong and Flat shaders to GLES. Hope the reduced precision won't hurt.
14 years ago
#endif