15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/callback_forward.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/common/content_export.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/size.h" 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "ui/gfx/vector2d.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/surface/transport_dib.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class RenderProcessHost; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace gfx { 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Rect; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace skia { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class PlatformBitmap; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class RenderProcessHost; 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class RenderWidgetHost; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Represents a backing store for the pixels in a RenderWidgetHost. 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class CONTENT_EXPORT BackingStore { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~BackingStore(); 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RenderWidgetHost* render_widget_host() const { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return render_widget_host_; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::Size& size() { return size_; } 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The number of bytes that this backing store consumes. The default 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // implementation just assumes there's 32 bits per pixel over the current 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // size of the screen. Implementations may override this if they have more 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // information about the color depth. 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual size_t MemorySize(); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Paints the bitmap from the renderer onto the backing store. bitmap_rect 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // gives the location of bitmap, and copy_rects specifies the subregion(s) of 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the backingstore to be painted from the bitmap. All coordinates are in 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // DIPs. |scale_factor| contains the expected device scale factor of the 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // backing store. 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // PaintToBackingStore does not need to guarantee that this has happened by 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the time it returns, in which case it will set |scheduled_callback| to 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // true and will call |callback| when completed. 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void PaintToBackingStore( 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RenderProcessHost* process, 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TransportDIB::Id bitmap, 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::Rect& bitmap_rect, 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::vector<gfx::Rect>& copy_rects, 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float scale_factor, 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Closure& completion_callback, 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool* scheduled_completion_callback) = 0; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Extracts the gives subset of the backing store and copies it to the given 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // PlatformCanvas. The PlatformCanvas should not be initialized. This function 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // will call initialize() with the correct size. The return value indicates 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // success. 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual bool CopyFromBackingStore(const gfx::Rect& rect, 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) skia::PlatformBitmap* output) = 0; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Scrolls the contents of clip_rect in the backing store by |delta| (but 732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // |delta|.x() and |delta|.y() cannot both be non-zero). 742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) virtual void ScrollBackingStore(const gfx::Vector2d& delta, 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::Rect& clip_rect, 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::Size& view_size) = 0; 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) protected: 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Can only be constructed via subclasses. 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BackingStore(RenderWidgetHost* widget, const gfx::Size& size); 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The owner of this backing store. 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RenderWidgetHost* render_widget_host_; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The size of the backing store. 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Size size_; 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(BackingStore); 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace content 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // CONTENT_BROWSER_RENDERER_HOST_BACKING_STORE_H_ 94