cc/quads/render_pass.h

   1 // Copyright 2011 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_QUADS_RENDER_PASS_H_
   6 #define CC_QUADS_RENDER_PASS_H_
   7
   8 #include <utility>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/containers/hash_tables.h"
  13 #include "cc/base/cc_export.h"
  14 #include "cc/base/scoped_ptr_vector.h"
  15 #include "skia/ext/refptr.h"
  16 #include "ui/gfx/rect.h"
  17 #include "ui/gfx/rect_f.h"
  18 #include "ui/gfx/transform.h"
  19
  20 namespace base {
  21 class Value;
  22 };
  23
  24 namespace cc {
  25
  26 class DrawQuad;
  27 class CopyOutputRequest;
  28 class SharedQuadState;
  29
  30 // A list of DrawQuad objects, sorted internally in front-to-back order.
  31 class QuadList : public ScopedPtrVector<DrawQuad> {
  32  public:
  33   typedef reverse_iterator BackToFrontIterator;
  34   typedef const_reverse_iterator ConstBackToFrontIterator;
  35
  36   inline BackToFrontIterator BackToFrontBegin() { return rbegin(); }
  37   inline BackToFrontIterator BackToFrontEnd() { return rend(); }
  38   inline ConstBackToFrontIterator BackToFrontBegin() const { return rbegin(); }
  39   inline ConstBackToFrontIterator BackToFrontEnd() const { return rend(); }
  40 };
  41
  42 typedef ScopedPtrVector<SharedQuadState> SharedQuadStateList;
  43
  44 class CC_EXPORT RenderPass {
  45  public:
  46   struct Id {
  47     int layer_id;
  48     int index;
  49
  50     Id(int layer_id, int index) : layer_id(layer_id), index(index) {}
  51     void* AsTracingId() const;
  52
  53     bool operator==(const Id& other) const {
  54       return layer_id == other.layer_id && index == other.index;
  55     }
  56     bool operator!=(const Id& other) const {
  57       return !(*this == other);
  58     }
  59     bool operator<(const Id& other) const {
  60       return layer_id < other.layer_id ||
  61           (layer_id == other.layer_id && index < other.index);
  62     }
  63   };
  64
  65   ~RenderPass();
  66
  67   static scoped_ptr<RenderPass> Create();
  68   static scoped_ptr<RenderPass> Create(size_t num_layers);
  69
  70   // A shallow copy of the render pass, which does not include its quads or copy
  71   // requests.
  72   scoped_ptr<RenderPass> Copy(Id new_id) const;
  73
  74   // A deep copy of the render passes in the list including the quads.
  75   static void CopyAll(const ScopedPtrVector<RenderPass>& in,
  76                       ScopedPtrVector<RenderPass>* out);
  77
  78   void SetNew(Id id,
  79               const gfx::Rect& output_rect,
  80               const gfx::RectF& damage_rect,
  81               const gfx::Transform& transform_to_root_target);
  82
  83   void SetAll(Id id,
  84               const gfx::Rect& output_rect,
  85               const gfx::RectF& damage_rect,
  86               const gfx::Transform& transform_to_root_target,
  87               bool has_transparent_background);
  88
  89   scoped_ptr<base::Value> AsValue() const;
  90
  91   // Uniquely identifies the render pass in the compositor's current frame.
  92   Id id;
  93
  94   // These are in the space of the render pass' physical pixels.
  95   gfx::Rect output_rect;
  96   gfx::RectF damage_rect;
  97
  98   // Transforms from the origin of the |output_rect| to the origin of the root
  99   // render pass' |output_rect|.
 100   gfx::Transform transform_to_root_target;
 101
 102   // If false, the pixels in the render pass' texture are all opaque.
 103   bool has_transparent_background;
 104
 105   // If non-empty, the renderer should produce a copy of the render pass'
 106   // contents as a bitmap, and give a copy of the bitmap to each callback in
 107   // this list. This property should not be serialized between compositors, as
 108   // it only makes sense in the root compositor.
 109   ScopedPtrVector<CopyOutputRequest> copy_requests;
 110
 111   QuadList quad_list;
 112   SharedQuadStateList shared_quad_state_list;
 113
 114  protected:
 115   explicit RenderPass(size_t num_layers);
 116   RenderPass();
 117
 118  private:
 119   DISALLOW_COPY_AND_ASSIGN(RenderPass);
 120 };
 121
 122 }  // namespace cc
 123
 124 namespace BASE_HASH_NAMESPACE {
 125 #if defined(COMPILER_MSVC)
 126 inline size_t hash_value(const cc::RenderPass::Id& key) {
 127   return base::HashPair(key.layer_id, key.index);
 128 }
 129 #elif defined(COMPILER_GCC)
 130 template<>
 131 struct hash<cc::RenderPass::Id> {
 132   size_t operator()(cc::RenderPass::Id key) const {
 133     return base::HashPair(key.layer_id, key.index);
 134   }
 135 };
 136 #else
 137 #error define a hash function for your compiler
 138 #endif  // COMPILER
 139 }  // namespace BASE_HASH_NAMESPACE
 140
 141 namespace cc {
 142 typedef ScopedPtrVector<RenderPass> RenderPassList;
 143 typedef base::hash_map<RenderPass::Id, RenderPass*> RenderPassIdHashMap;
 144 }  // namespace cc
 145
 146 #endif  // CC_QUADS_RENDER_PASS_H_