- char name[128];
- int len;
- glGetActiveUniformBlockName(id, i, sizeof(name), &len, name);
- uniform_blocks.push_back(UniformBlockInfo());
- UniformBlockInfo &info = uniform_blocks.back();
- info.name = name;
-
- int value;
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_DATA_SIZE, &value);
- info.data_size = value;
-
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_BINDING, &value);
- info.bind_point = value;
-
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &value);
- vector<int> indices(value);
- glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, &indices[0]);
- for(int j: indices)
- {
- if(!uniforms_by_index[j])
- throw logic_error("Program::link");
- info.uniforms.push_back(uniforms_by_index[j]);
- uniforms_by_index[j]->block = &info;
- }
-
- vector<unsigned> query_indices(indices.begin(), indices.end());
- vector<int> values(indices.size());
- glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_OFFSET, &values[0]);
- for(unsigned j=0; j<indices.size(); ++j)
- uniforms_by_index[indices[j]]->offset = values[j];
-
- query_indices.clear();
- for(int j: indices)
- if(uniforms_by_index[j]->array_size>1)
- query_indices.push_back(j);
- if(!query_indices.empty())
- {
- glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
- for(unsigned j=0; j<query_indices.size(); ++j)
- uniforms_by_index[query_indices[j]]->array_stride = values[j];
- }
-
- query_indices.clear();
- for(int j: indices)
- {
- DataType t = uniforms_by_index[j]->type;
- if(is_matrix(t))
- query_indices.push_back(j);
- }
- if(!query_indices.empty())
- {
- glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
- for(unsigned j=0; j<query_indices.size(); ++j)
- uniforms_by_index[query_indices[j]]->matrix_stride = values[j];
- }
-
- sort(info.uniforms, uniform_location_compare);
- info.layout_hash = compute_layout_hash(info.uniforms);