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only change shader if needed

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This commit is contained in:
degasus 2013-01-15 14:22:40 +01:00
parent 85200db6a2
commit 687d74e6c2
3 changed files with 14 additions and 21 deletions
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29
Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp
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@ -131,26 +131,25 @@ void ProgramShaderCache::SetProgramBindings ( ProgramShaderCache::PCacheEntry& e
void ProgramShaderCache::SetBothShaders(GLuint PS, GLuint VS)
{
if(!PS || !VS) {
ERROR_LOG(VIDEO, "tried to bind a zero shader");
return;
}
CurrentFShader = PS;
CurrentVShader = VS;
if (CurrentFShader == 0 && CurrentVShader == 0)
{
CurrentProgram = 0;
glUseProgram(0);
return;
}
// Fragment shaders can survive without Vertex Shaders
// We have a valid fragment shader, let's create our program
// We have a valid shaders, let's create our program
std::pair<u32, u32> ShaderPair = std::make_pair(CurrentFShader, CurrentVShader);
PCache::iterator iter = pshaders.find(ShaderPair);
if (iter != pshaders.end())
{
PCacheEntry &entry = iter->second;
glUseProgram(entry.prog_id);
CurrentShaderProgram = ShaderPair;
CurrentProgram = entry.prog_id;
if(CurrentProgram != entry.prog_id) {
glUseProgram(entry.prog_id);
CurrentProgram = entry.prog_id;
CurrentShaderProgram = ShaderPair;
}
return;
}
@ -159,9 +158,7 @@ void ProgramShaderCache::SetBothShaders(GLuint PS, GLuint VS)
// Right, the program is created now
// Let's attach everything
if (entry.vsid != 0) // attaching zero vertex shader makes it freak out
glAttachShader(entry.prog_id, entry.vsid);
glAttachShader(entry.prog_id, entry.vsid);
glAttachShader(entry.prog_id, entry.psid);
if (g_ActiveConfig.backend_info.bSupportsGLSLCache)
@ -254,6 +251,8 @@ void ProgramShaderCache::Init(void)
ProgramShaderCacheInserter inserter;
g_program_disk_cache.OpenAndRead(cache_filename, inserter);
}
CurrentProgram = 0;
}
void ProgramShaderCache::Shutdown(void)