content/renderer/render_process.h

   1 // Copyright (c) 2010 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 CONTENT_RENDERER_RENDER_PROCESS_H_
   6 #define CONTENT_RENDERER_RENDER_PROCESS_H_
   7 #pragma once
   8
   9 #include "content/common/child_process.h"
  10 #include "skia/ext/platform_canvas.h"
  11
  12 class TransportDIB;
  13
  14 namespace gfx {
  15 class Rect;
  16 }
  17
  18 namespace skia {
  19 class PlatformCanvas;
  20 }
  21
  22 // A abstract interface representing the renderer end of the browser<->renderer
  23 // connection. The opposite end is the RenderProcessHost. This is a singleton
  24 // object for each renderer.
  25 //
  26 // RenderProcessImpl implements this interface for the regular browser.
  27 // MockRenderProcess implements this interface for certain tests, especially
  28 // ones derived from RenderViewTest.
  29 class RenderProcess : public ChildProcess {
  30  public:
  31   RenderProcess() {}
  32   virtual ~RenderProcess() {}
  33
  34   // Get a canvas suitable for drawing and transporting to the browser
  35   //   memory: (output) the transport DIB memory
  36   //   rect: the rectangle which will be painted, use for sizing the canvas
  37   //   returns: NULL on error
  38   //
  39   // When no longer needed, you should pass the TransportDIB to
  40   // ReleaseTransportDIB so that it can be recycled.
  41   virtual skia::PlatformCanvas* GetDrawingCanvas(TransportDIB** memory,
  42                                                  const gfx::Rect& rect) = 0;
  43
  44   // Frees shared memory allocated by AllocSharedMemory.  You should only use
  45   // this function to free the SharedMemory object.
  46   virtual void ReleaseTransportDIB(TransportDIB* memory) = 0;
  47
  48   // Returns true if plugisn should be loaded in-process.
  49   virtual bool UseInProcessPlugins() const = 0;
  50
  51   // Returns a pointer to the RenderProcess singleton instance. Assuming that
  52   // we're actually a renderer or a renderer test, this static cast will
  53   // be correct.
  54   static RenderProcess* current() {
  55     return static_cast<RenderProcess*>(ChildProcess::current());
  56   }
  57
  58  private:
  59   DISALLOW_COPY_AND_ASSIGN(RenderProcess);
  60 };
  61
  62 #endif  // CONTENT_RENDERER_RENDER_PROCESS_H_