cc/output/copy_output_request.h

   1 // Copyright 2013 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_OUTPUT_COPY_OUTPUT_REQUEST_H_
   6 #define CC_OUTPUT_COPY_OUTPUT_REQUEST_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "cc/base/cc_export.h"
  11 #include "ui/gfx/rect.h"
  12
  13 class SkBitmap;
  14
  15 namespace cc {
  16 class CopyOutputResult;
  17 class SingleReleaseCallback;
  18 class TextureMailbox;
  19
  20 class CC_EXPORT CopyOutputRequest {
  21  public:
  22   typedef base::Callback<void(scoped_ptr<CopyOutputResult> result)>
  23       CopyOutputRequestCallback;
  24
  25   static scoped_ptr<CopyOutputRequest> CreateEmptyRequest() {
  26     return make_scoped_ptr(new CopyOutputRequest);
  27   }
  28   static scoped_ptr<CopyOutputRequest> CreateRequest(
  29       const CopyOutputRequestCallback& result_callback) {
  30     return make_scoped_ptr(new CopyOutputRequest(false, result_callback));
  31   }
  32   static scoped_ptr<CopyOutputRequest> CreateBitmapRequest(
  33       const CopyOutputRequestCallback& result_callback) {
  34     return make_scoped_ptr(new CopyOutputRequest(true, result_callback));
  35   }
  36   static scoped_ptr<CopyOutputRequest> CreateRelayRequest(
  37       const CopyOutputRequest& original_request,
  38       const CopyOutputRequestCallback& result_callback) {
  39     scoped_ptr<CopyOutputRequest> relay = CreateRequest(result_callback);
  40     relay->force_bitmap_result_ = original_request.force_bitmap_result_;
  41     relay->has_area_ = original_request.has_area_;
  42     relay->area_ = original_request.area_;
  43     return relay.Pass();
  44   }
  45
  46   ~CopyOutputRequest();
  47
  48   bool IsEmpty() const { return result_callback_.is_null(); }
  49
  50   bool force_bitmap_result() const { return force_bitmap_result_; }
  51
  52   // By default copy requests copy the entire layer's subtree output. If an
  53   // area is given, then the intersection of this rect (in layer space) with
  54   // the layer's subtree output will be returned.
  55   void set_area(gfx::Rect area) {
  56     has_area_ = true;
  57     area_ = area;
  58   }
  59   bool has_area() const { return has_area_; }
  60   gfx::Rect area() const { return area_; }
  61
  62   void SendEmptyResult();
  63   void SendBitmapResult(scoped_ptr<SkBitmap> bitmap);
  64   void SendTextureResult(gfx::Size size,
  65                          const TextureMailbox& texture_mailbox,
  66                          scoped_ptr<SingleReleaseCallback> release_callback);
  67
  68   void SendResult(scoped_ptr<CopyOutputResult> result);
  69
  70   bool Equals(const CopyOutputRequest& other) const {
  71     return result_callback_.Equals(other.result_callback_) &&
  72         force_bitmap_result_ == other.force_bitmap_result_;
  73   }
  74
  75  private:
  76   CopyOutputRequest();
  77   explicit CopyOutputRequest(bool force_bitmap_result,
  78                              const CopyOutputRequestCallback& result_callback);
  79
  80   bool force_bitmap_result_;
  81   bool has_area_;
  82   gfx::Rect area_;
  83   CopyOutputRequestCallback result_callback_;
  84 };
  85
  86 }  // namespace cc
  87
  88 #endif  // CC_OUTPUT_COPY_OUTPUT_REQUEST_H_