Use UBOs instead of glUniform. Work in progress; no clear wins seen yet.

[movit] / effect_util.cpp

diff --git a/effect_util.cpp b/effect_util.cpp
index dbeb48b0381a12bd682c018c799199c5869f39cb..4036caf6a49ecb684a4af50a509de1bb3413b674 100644 (file)
--- a/effect_util.cpp
+++ b/effect_util.cpp
@@ -14,6 +14,24 @@ GLint get_uniform_location(GLuint glsl_program_num, const string &prefix, const
        return glGetUniformLocation(glsl_program_num, name.c_str());
 }
 
+void get_uniform_offset_and_size(GLuint glsl_program_num, const string &prefix, const string &key, GLint *offset, GLint *size)
+{
+       string name = prefix + "_" + key;
+       GLuint index;
+       const GLchar *name_cstr = name.c_str();
+       glGetUniformIndices(glsl_program_num, 1, &name_cstr, &index);
+       check_error();
+       if (index == GL_INVALID_INDEX) {
+               *offset = -1;
+               *size = 0;
+               return;
+       }
+       glGetActiveUniformsiv(glsl_program_num, 1, &index, GL_UNIFORM_OFFSET, offset);
+       check_error();
+       glGetActiveUniformsiv(glsl_program_num, 1, &index, GL_UNIFORM_SIZE, size);
+       check_error();
+}
+
 void set_uniform_int(GLuint glsl_program_num, const string &prefix, const string &key, int value)
 {
        GLint location = get_uniform_location(glsl_program_num, prefix, key);