cc/trees/draw_property_utils.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_TREES_DRAW_PROPERTY_UTILS_H_
   6 #define CC_TREES_DRAW_PROPERTY_UTILS_H_
   7
   8 #include "cc/base/cc_export.h"
   9
  10 namespace gfx {
  11 class Rect;
  12 class Transform;
  13 }  // namespace gfx
  14
  15 namespace cc {
  16
  17 class ClipTree;
  18 class Layer;
  19 class TransformTree;
  20
  21 // Computes combined clips for every node in |clip_tree|. This function requires
  22 // that |transform_tree| has been updated via |ComputeTransforms|.
  23 // TODO(vollick): ComputeClips and ComputeTransforms will eventually need to be
  24 // done on both threads.
  25 void CC_EXPORT
  26 ComputeClips(ClipTree* clip_tree, const TransformTree& transform_tree);
  27
  28 // Computes combined (screen space) transforms for every node in the transform
  29 // tree. This must be done prior to calling |ComputeClips|.
  30 void CC_EXPORT ComputeTransforms(TransformTree* transform_tree);
  31
  32 // Computes the visible content rect for every layer under |root_layer|. The
  33 // visible content rect is the clipped content space rect that will be used for
  34 // recording.
  35 void CC_EXPORT
  36 ComputeVisibleRectsUsingPropertyTrees(Layer* root_layer,
  37                                       const Layer* page_scale_layer,
  38                                       float page_scale_factor,
  39                                       float device_scale_factor,
  40                                       const gfx::Rect& viewport,
  41                                       const gfx::Transform& device_transform,
  42                                       TransformTree* transform_tree,
  43                                       ClipTree* clip_tree);
  44
  45 }  // namespace cc
  46
  47 #endif  // CC_TREES_DRAW_PROPERTY_UTILS_H_