From ed1b78e32235680c3978b9830e5ba81115a0ab7d Mon Sep 17 00:00:00 2001
From: Jonathan Goodman <geenz@geenzo.com>
Date: Tue, 28 Aug 2012 10:33:32 -0400
Subject: Added support for adding custom preprocessor definitions (for shader
permutations)
---
indra/llrender/llglslshader.cpp | 9 +++++++--
indra/llrender/llglslshader.h | 3 +++
indra/llrender/llshadermgr.cpp | 13 +++++++++++--
indra/llrender/llshadermgr.h | 2 +-
4 files changed, 22 insertions(+), 5 deletions(-)
(limited to 'indra/llrender')
diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index 7cbf39096e..d345b6593e 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -150,7 +150,7 @@ BOOL LLGLSLShader::createShader(vector<string> * attributes,
vector< pair<string,GLenum> >::iterator fileIter = mShaderFiles.begin();
for ( ; fileIter != mShaderFiles.end(); fileIter++ )
{
- GLhandleARB shaderhandle = LLShaderMgr::instance()->loadShaderFile((*fileIter).first, mShaderLevel, (*fileIter).second, mFeatures.mIndexedTextureChannels);
+ GLhandleARB shaderhandle = LLShaderMgr::instance()->loadShaderFile((*fileIter).first, mShaderLevel, (*fileIter).second, mDefines, mFeatures.mIndexedTextureChannels);
LL_DEBUGS("ShaderLoading") << "SHADER FILE: " << (*fileIter).first << " mShaderLevel=" << mShaderLevel << LL_ENDL;
if (shaderhandle > 0)
{
@@ -372,7 +372,12 @@ void LLGLSLShader::mapUniform(GLint index, const vector<string> * uniforms)
}
}
}
- }
+}
+
+void LLGLSLShader::addPermutation(std::string name, std::string value)
+{
+ mDefines[name] = value;
+}
GLint LLGLSLShader::mapUniformTextureChannel(GLint location, GLenum type)
{
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index 5c68cb46eb..bee5d9adda 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -123,6 +123,8 @@ public:
GLint getAttribLocation(U32 attrib);
GLint mapUniformTextureChannel(GLint location, GLenum type);
+ void addPermutation(std::string name, std::string value);
+
//enable/disable texture channel for specified uniform
//if given texture uniform is active in the shader,
//the corresponding channel will be active upon return
@@ -153,6 +155,7 @@ public:
LLShaderFeatures mFeatures;
std::vector< std::pair< std::string, GLenum > > mShaderFiles;
std::string mName;
+ std::map<std::string, std::string> mDefines;
};
//UI shader (declared here so llui_libtest will link properly)
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index b6a9a6b653..d15584d2e1 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -521,7 +521,7 @@ void LLShaderMgr::dumpObjectLog(GLhandleARB ret, BOOL warns)
}
}
-GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type, S32 texture_index_channels)
+GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type, std::map<std::string, std::string> defines, S32 texture_index_channels)
{
GLenum error = GL_NO_ERROR;
if (gDebugGL)
@@ -657,6 +657,15 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
std::string define = "#define " + iter->first + " " + iter->second + "\n";
text[count++] = (GLcharARB *) strdup(define.c_str());
}
+
+ for (std::map<std::string,std::string>::iterator iter = defines.begin(); iter != defines.end(); ++iter)
+ {
+ if (iter->first != "NULL")
+ {
+ std::string define = "#define " + iter->first + " " + iter->second + "\n";
+ text[count++] = (GLcharARB *) strdup(define.c_str());
+ }
+ }
if (texture_index_channels > 0 && type == GL_FRAGMENT_SHADER_ARB)
{
@@ -854,7 +863,7 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
if (shader_level > 1)
{
shader_level--;
- return loadShaderFile(filename,shader_level,type,texture_index_channels);
+ return loadShaderFile(filename,shader_level,type, defines, texture_index_channels);
}
LL_WARNS("ShaderLoading") << "Failed to load " << filename << LL_ENDL;
}
diff --git a/indra/llrender/llshadermgr.h b/indra/llrender/llshadermgr.h
index 7a16b7c20f..88c60b2144 100644
--- a/indra/llrender/llshadermgr.h
+++ b/indra/llrender/llshadermgr.h
@@ -176,7 +176,7 @@ public:
void dumpObjectLog(GLhandleARB ret, BOOL warns = TRUE);
BOOL linkProgramObject(GLhandleARB obj, BOOL suppress_errors = FALSE);
BOOL validateProgramObject(GLhandleARB obj);
- GLhandleARB loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type, S32 texture_index_channels = -1);
+ GLhandleARB loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type, std::map<std::string, std::string> defines, S32 texture_index_channels = -1);
// Implemented in the application to actually point to the shader directory.
virtual std::string getShaderDirPrefix(void) = 0; // Pure Virtual
--
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