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ubo streaming

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This commit is contained in:
degasus 2013-01-25 13:20:42 +01:00
parent e0ffdda26e
commit a526fc5f92
2 changed files with 20 additions and 10 deletions
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29
Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp
View File

@ -21,9 +21,12 @@
namespace OGL
{
static const u32 UBO_LENGTH = 1024*1024;
GLuint ProgramShaderCache::CurrentProgram = 0;
ProgramShaderCache::PCache ProgramShaderCache::pshaders;
GLuint ProgramShaderCache::s_ps_vs_ubo;
u32 ProgramShaderCache::s_ubo_iterator;
GLintptr ProgramShaderCache::s_vs_data_offset;
float *ProgramShaderCache::s_ubo_buffer;
u32 ProgramShaderCache::s_ubo_buffer_size;
@ -192,12 +195,23 @@ void ProgramShaderCache::SetMultiVSConstant4fv(unsigned int offset, const float
void ProgramShaderCache::UploadConstants()
{
if(s_ubo_dirty)
glBufferData(GL_UNIFORM_BUFFER, s_ubo_buffer_size, s_ubo_buffer, GL_STREAM_DRAW);
if(s_ubo_dirty) {
if(s_ubo_iterator + s_ubo_buffer_size >= UBO_LENGTH) {
glBufferData(GL_UNIFORM_BUFFER, UBO_LENGTH, NULL, GL_STREAM_DRAW);
s_ubo_iterator = 0;
}
void *ubo = glMapBufferRange(GL_UNIFORM_BUFFER, s_ubo_iterator, s_ubo_buffer_size, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
memcpy(ubo, s_ubo_buffer, s_ubo_buffer_size);
glUnmapBuffer(GL_UNIFORM_BUFFER);
glBindBufferRange(GL_UNIFORM_BUFFER, 1, s_ps_vs_ubo, s_ubo_iterator, s_vs_data_offset);
glBindBufferRange(GL_UNIFORM_BUFFER, 2, s_ps_vs_ubo, s_ubo_iterator + s_vs_data_offset, s_ubo_buffer_size - s_vs_data_offset);
s_ubo_iterator += s_ubo_buffer_size;
}
s_ubo_dirty = false;
}
GLuint ProgramShaderCache::GetCurrentProgram(void)
{
return CurrentProgram;
@ -228,13 +242,8 @@ void ProgramShaderCache::Init(void)
// Then once more to get bytes
glGenBuffers(1, &s_ps_vs_ubo);
glBindBuffer(GL_UNIFORM_BUFFER, s_ps_vs_ubo);
glBufferData(GL_UNIFORM_BUFFER, s_ubo_buffer_size, NULL, GL_STREAM_DRAW);
// Now bind the buffer to the index point
// We know PS is 0 since we have it statically set in the shader
// Repeat for VS shader
glBindBufferRange(GL_UNIFORM_BUFFER, 1, s_ps_vs_ubo, 0, ps_data_size);
glBindBufferRange(GL_UNIFORM_BUFFER, 2, s_ps_vs_ubo, s_vs_data_offset, vs_data_size);
glBufferData(GL_UNIFORM_BUFFER, UBO_LENGTH, NULL, GL_STREAM_DRAW);
s_ubo_iterator = 0;
s_ubo_buffer = new float[s_ubo_buffer_size/sizeof(float)];
memset(s_ubo_buffer, 0, s_ubo_buffer_size);

1
Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h
View File

@ -154,6 +154,7 @@ private:
static ShaderUID CurrentShaderProgram;
static GLuint s_ps_vs_ubo;
static u32 s_ubo_iterator;
static GLintptr s_vs_data_offset;
static float *s_ubo_buffer;
static u32 s_ubo_buffer_size;