Mozart: Specify texture origin explicitly.

examples/ui/spinning_cube/spinning_cube_view.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "examples/ui/spinning_cube/spinning_cube_view.h"
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif
 
@@ skipping 145 matching lines @@
   auto update = mojo::gfx::composition::SceneUpdate::New();
   mojo::gfx::composition::ResourcePtr cube_resource = gl_renderer()->DrawGL(
       size_, true,
       base::Bind(&SpinningCubeView::DrawCubeWithGL, base::Unretained(this)));
   DCHECK(cube_resource);
   update->resources.insert(kCubeImageResourceId, cube_resource.Pass());
 
   auto root_node = mojo::gfx::composition::Node::New();
   root_node->content_transform = mojo::Transform::New();
   mojo::SetIdentityTransform(root_node->content_transform.get());
-  // TODO(jeffbrown): Figure out why spinning cube is drawing upside down.
-  // Other GL based programs don't seem to have this problem.
-  root_node->content_transform->matrix[5] = -1;  // flip image vertically
-  root_node->content_transform->matrix[7] = size_.height;
   root_node->op = mojo::gfx::composition::NodeOp::New();
   root_node->op->set_image(mojo::gfx::composition::ImageNodeOp::New());
   root_node->op->get_image()->content_rect = bounds.Clone();
   root_node->op->get_image()->image_resource_id = kCubeImageResourceId;
   update->nodes.insert(kRootNodeId, root_node.Pass());
 
   auto metadata = mojo::gfx::composition::SceneMetadata::New();
   metadata->presentation_time = frame_info.presentation_time;
 
   // Publish the scene.
   scene()->Update(update.Pass());
   scene()->Publish(metadata.Pass());
 
   // Loop!
   choreographer_.ScheduleDraw();
 }
 
 void SpinningCubeView::DrawCubeWithGL() {
   cube_.set_size(size_.width, size_.height);
   cube_.Draw();
 }
 
 }  // namespace examples