X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fprogram.cpp;h=d962751994d38fe1e7fd93550bb51a545eaec9f6;hb=ccd59643144950604f95339683bac0ca4e8366d1;hp=ffcc4a6c81bd3db1f3aa4c0315676dd1c5e6d1e2;hpb=ac11296dca7c7a594ff1b20bead87e1e161b4bef;p=libs%2Fgl.git

diff --git a/source/program.cpp b/source/program.cpp
index ffcc4a6c..d9627519 100644
--- a/source/program.cpp
+++ b/source/program.cpp
@@ -297,9 +297,12 @@ void Program::link()
 			for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 				if(uniforms_by_index[*j]->size>1)
 					indices2.push_back(*j);
-			glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
-			for(unsigned j=0; j<indices2.size(); ++j)
-				uniforms_by_index[indices[j]]->array_stride = values[j];
+			if(!indices2.empty())
+			{
+				glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
+				for(unsigned j=0; j<indices2.size(); ++j)
+					uniforms_by_index[indices[j]]->array_stride = values[j];
+			}
 
 			indices2.clear();
 			for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
@@ -310,10 +313,14 @@ void Program::link()
 					t==GL_FLOAT_MAT3x4 || t==GL_FLOAT_MAT4x2 || t==GL_FLOAT_MAT4x3)
 					indices2.push_back(*j);
 			}
-			glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
-			for(unsigned j=0; j<indices2.size(); ++j)
-				uniforms_by_index[indices[j]]->matrix_stride = values[j];
+			if(!indices2.empty())
+			{
+				glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
+				for(unsigned j=0; j<indices2.size(); ++j)
+					uniforms_by_index[indices[j]]->matrix_stride = values[j];
+			}
 
+			sort(info.uniforms.begin(), info.uniforms.end(), uniform_location_compare);
 			info.layout_hash = compute_layout_hash(info.uniforms);
 			info.bind_point = info.layout_hash%BufferRange::get_n_uniform_buffer_bindings();
 			glUniformBlockBinding(id, i, info.bind_point);
@@ -339,6 +346,11 @@ unsigned Program::compute_layout_hash(const vector<const UniformInfo *> &uniform
 	return hash32(layout_descriptor);
 }
 
+bool Program::uniform_location_compare(const UniformInfo *uni1, const UniformInfo *uni2)
+{
+	return uni1->location<uni2->location;
+}
+
 string Program::get_info_log() const
 {
 	GLsizei len = 0;