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glsl_shaders.cpp
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95 lines (81 loc) · 3.01 KB
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/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2016-2017 Baldur Karlsson
*
* 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.
******************************************************************************/
#include "glsl_shaders.h"
#include "os/os_specific.h"
void GenerateGLSLShader(std::vector<std::string> &sources, ShaderType type,
const std::string &defines, const std::string &shader, int version,
bool uniforms)
{
sources.resize(4);
sources[0] =
StringFormat::Fmt("#version %d %s\n", version, type == eShaderGLSLES ? "es" : "core");
if(uniforms)
sources[1] = GetEmbeddedResource(glsl_debuguniforms_h);
else
sources[1] = "";
if(shader.find("#include \"texsample.h\"") != string::npos)
{
if(type == eShaderVulkan)
sources[2] = GetEmbeddedResource(glsl_vk_texsample_h);
else if(type == eShaderGLSL)
sources[2] = GetEmbeddedResource(glsl_gl_texsample_h);
else if(type == eShaderGLSLES)
sources[2] = GetEmbeddedResource(glsl_gles_texsample_h);
else
RDCERR("Unknown type! %d", type);
}
else
{
sources[2] = "";
}
sources[3] = shader;
for(int i = 0; i < 4; i++)
{
// hoist up any #extension directives
size_t extsearch = 0;
do
{
extsearch = sources[i].find("#extension", extsearch);
if(extsearch == string::npos)
break;
size_t begin = extsearch;
extsearch = sources[i].find('\n', extsearch);
string ext = sources[i].substr(begin, extsearch - begin + 1);
if(ext.find("#extension_gles") == 0)
{
if(type != eShaderGLSLES)
continue;
ext.erase(ext.find("_gles"), 5);
}
else if(ext.find("#extension_nongles") == 0)
{
if(type == eShaderGLSLES)
continue;
ext.erase(ext.find("_nongles"), 8);
}
sources[0] += ext;
} while(extsearch != string::npos);
}
sources[0] += "\n" + defines + "\n";
}