OpenGL Shading Language Compatibilité à l'envers

Activités récentes a poussé cette ancienne question et j'ai réalisé que je résolvai la question. Ce n'était pas facile, mais c'est une solution réussie, prouvée par de nombreuses shaders basées sur elle et le nombre de pilotes qui compilait la source de shader.

essentiellement, j'ai utilisé le gl_arb_shading_language_include_language_include extension (et j'ai également mis en place un prétraiteur source pour le système qui ne le met pas en œuvre), et j'ai fini par Définissez la Shader suivante Inclure la source: P>

//  Copyright (C) 2011-2013 Luca Piccioni
// 
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
// 
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
// 
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.

// @BeginInterface

// Shader renderer

// Symbol defined if running on NVIDIA renderer.
#define DS_VENDOR_NVIDIA            1
// Symbol defined if running on ATI/AMD renderer.
#define DS_VENDOR_AMD               2
// Symbol defined if running on INTEL renderer
#define DS_VENDOR_INTEL             3

// Shader inputs and outputs keywords
//
// - ATTRIBUTE: used to mark a vertex shader inputs
// - SHADER_IN: used to mark a non-vertex shader inputs
// - SHADER_OUT: used to mark a non-fragment shader output
// - OUT: used to mark a fragment shader output
#if __VERSION__ >= 130

#define ATTRIBUTE in
#define SHADER_IN in
#define SHADER_OUT out
#define OUT out

#else

#define ATTRIBUTE attribute
#define SHADER_IN varying
#define SHADER_OUT varying
#define OUT

#endif

// Support array attributes
#if __VERSION__ >= 130

#define ARRAY_ATTRIBUTE(name, size) name[size]

#else

#define ARRAY_ATTRIBUTE(name, size) name[size]

#endif

// Uniform blocks
#if __VERSION__ >= 130

#define BEGIN_UNIFORM_BLOCK(name)   uniform name {

#define END_UNIFORM_BLOCK() };

#else

#define BEGIN_UNIFORM_BLOCK(name)

#define END_UNIFORM_BLOCK()

#endif

// Input and output blocks
#if __VERSION__ >= 150

#define BEGIN_INPUT_BLOCK(name) in name {
#define END_INPUT_BLOCK() };

#define BEGIN_OUTPUT_BLOCK(name) out name {
#define END_OUTPUT_BLOCK() };

#else

#define BEGIN_INPUT_BLOCK(name)
#define END_INPUT_BLOCK()

#define BEGIN_OUTPUT_BLOCK(name)
#define END_OUTPUT_BLOCK()

#endif

// Texturing functions
#if __VERSION__ >= 130

#define TEXTURE_2D texture
#define TEXTURE_3D texture
#define TEXTURE_RECT texture
#define TEXTURE_CUBE texture

#if __VERSION__ >= 150
#define TEXTURE_SIZE(sampler) textureSize(sampler)
#else
#define TEXTURE_SIZE(sampler) sampler ## _Size
#endif

#else

#define TEXTURE_2D texture2D
#define TEXTURE_3D texture3D
#define TEXTURE_RECT texture2DRect
#define TEXTURE_CUBE textureCube

#endif

// Invariance
#if __VERSION__ >= 120
#define INVARIANT invariant
#else
#define INVARIANT
#endif

// Attribute location
#if defined(GL_ARB_explicit_attrib_location)
#define LOCATION(loc)       layout(location = loc)
#else
#define LOCATION(loc)
#endif

// Geometry shader layout
#if __VERSION__ >= 150
#define GEOMETRY_LAYOUT_IN(from) layout (from) in
#define GEOMETRY_LAYOUT(to, max) layout (to, max_vertices = max) out
#else
#define GEOMETRY_LAYOUT_IN(from)
#define GEOMETRY_LAYOUT(to, max)
#endif

// @EndInterface