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| 1 // Copyright (c) 2012 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 WEBKIT_PLUGINS_PPAPI_PPB_GRAPHICS_2D_IMPL_H_ | |
| 6 #define WEBKIT_PLUGINS_PPAPI_PPB_GRAPHICS_2D_IMPL_H_ | |
| 7 | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/memory/weak_ptr.h" | |
| 12 #include "ppapi/c/pp_completion_callback.h" | |
| 13 #include "ppapi/c/ppb_graphics_2d.h" | |
| 14 #include "ppapi/shared_impl/resource.h" | |
| 15 #include "ppapi/shared_impl/tracked_callback.h" | |
| 16 #include "ppapi/thunk/ppb_graphics_2d_api.h" | |
| 17 #include "third_party/WebKit/Source/Platform/chromium/public/WebCanvas.h" | |
| 18 #include "webkit/plugins/webkit_plugins_export.h" | |
| 19 | |
| 20 namespace gfx { | |
| 21 class Point; | |
| 22 class Rect; | |
| 23 } | |
| 24 | |
| 25 namespace content { | |
| 26 class PepperGraphics2DHost; | |
| 27 } | |
| 28 | |
| 29 namespace webkit { | |
| 30 namespace ppapi { | |
| 31 | |
| 32 class PPB_ImageData_Impl; | |
| 33 class PluginInstance; | |
| 34 | |
| 35 class WEBKIT_PLUGINS_EXPORT PPB_Graphics2D_Impl : | |
| 36 public ::ppapi::Resource, | |
| 37 public ::ppapi::thunk::PPB_Graphics2D_API { | |
| 38 public: | |
| 39 virtual ~PPB_Graphics2D_Impl(); | |
| 40 | |
| 41 static PP_Resource Create(PP_Instance instance, | |
| 42 const PP_Size& size, | |
| 43 PP_Bool is_always_opaque); | |
| 44 | |
| 45 bool is_always_opaque() const { return is_always_opaque_; } | |
| 46 | |
| 47 // Resource overrides. | |
| 48 virtual ::ppapi::thunk::PPB_Graphics2D_API* AsPPB_Graphics2D_API(); | |
| 49 virtual void LastPluginRefWasDeleted() OVERRIDE; | |
| 50 | |
| 51 // PPB_Graphics2D functions. | |
| 52 virtual PP_Bool Describe(PP_Size* size, PP_Bool* is_always_opaque) OVERRIDE; | |
| 53 virtual void PaintImageData(PP_Resource image_data, | |
| 54 const PP_Point* top_left, | |
| 55 const PP_Rect* src_rect) OVERRIDE; | |
| 56 virtual void Scroll(const PP_Rect* clip_rect, | |
| 57 const PP_Point* amount) OVERRIDE; | |
| 58 virtual void ReplaceContents(PP_Resource image_data) OVERRIDE; | |
| 59 virtual bool SetScale(float scale) OVERRIDE; | |
| 60 virtual float GetScale() OVERRIDE; | |
| 61 virtual int32_t Flush( | |
| 62 scoped_refptr< ::ppapi::TrackedCallback> callback, | |
| 63 PP_Resource* old_image_data) OVERRIDE; | |
| 64 | |
| 65 bool ReadImageData(PP_Resource image, const PP_Point* top_left); | |
| 66 | |
| 67 // Assciates this device with the given plugin instance. You can pass NULL to | |
| 68 // clear the existing device. Returns true on success. In this case, a | |
| 69 // repaint of the page will also be scheduled. Failure means that the device | |
| 70 // is already bound to a different instance, and nothing will happen. | |
| 71 bool BindToInstance(PluginInstance* new_instance); | |
| 72 | |
| 73 // Paints the current backing store to the web page. | |
| 74 void Paint(WebKit::WebCanvas* canvas, | |
| 75 const gfx::Rect& plugin_rect, | |
| 76 const gfx::Rect& paint_rect); | |
| 77 | |
| 78 // Notifications about the view's progress painting. See PluginInstance. | |
| 79 // These messages are used to send Flush callbacks to the plugin. | |
| 80 void ViewWillInitiatePaint(); | |
| 81 void ViewInitiatedPaint(); | |
| 82 void ViewFlushedPaint(); | |
| 83 | |
| 84 PPB_ImageData_Impl* image_data() { return image_data_.get(); } | |
| 85 PluginInstance* bound_instance() const { return bound_instance_; } | |
| 86 | |
| 87 // Scale |op_rect| to logical pixels, taking care to include partially- | |
| 88 // covered logical pixels (aka DIPs). Also scale optional |delta| to logical | |
| 89 // pixels as well for scrolling cases. Returns false for scrolling cases where | |
| 90 // scaling either |op_rect| or |delta| would require scrolling to fall back to | |
| 91 // invalidation due to rounding errors, true otherwise. | |
| 92 static bool ConvertToLogicalPixels(float scale, | |
| 93 gfx::Rect* op_rect, | |
| 94 gfx::Point* delta); | |
| 95 | |
| 96 private: | |
| 97 explicit PPB_Graphics2D_Impl(PP_Instance instance); | |
| 98 | |
| 99 bool Init(int width, int height, bool is_always_opaque); | |
| 100 | |
| 101 // Tracks a call to flush that requires a callback. | |
| 102 class FlushCallbackData { | |
| 103 public: | |
| 104 FlushCallbackData() { | |
| 105 Clear(); | |
| 106 } | |
| 107 | |
| 108 explicit FlushCallbackData( | |
| 109 scoped_refptr< ::ppapi::TrackedCallback> callback) { | |
| 110 Set(callback); | |
| 111 } | |
| 112 | |
| 113 bool is_null() const { | |
| 114 return !::ppapi::TrackedCallback::IsPending(callback_); | |
| 115 } | |
| 116 | |
| 117 void Set(scoped_refptr< ::ppapi::TrackedCallback> callback) { | |
| 118 callback_ = callback; | |
| 119 } | |
| 120 | |
| 121 void Clear() { | |
| 122 callback_ = NULL; | |
| 123 } | |
| 124 | |
| 125 void Execute(int32_t result) { | |
| 126 callback_->Run(result); | |
| 127 } | |
| 128 | |
| 129 void PostAbort() { | |
| 130 if (!is_null()) { | |
| 131 callback_->PostAbort(); | |
| 132 Clear(); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 private: | |
| 137 scoped_refptr< ::ppapi::TrackedCallback> callback_; | |
| 138 }; | |
| 139 | |
| 140 // Called internally to execute the different queued commands. The | |
| 141 // parameters to these functions will have already been validated. The last | |
| 142 // rect argument will be filled by each function with the area affected by | |
| 143 // the update that requires invalidation. If there were no pixels changed, | |
| 144 // this rect can be untouched. | |
| 145 void ExecutePaintImageData(PPB_ImageData_Impl* image, | |
| 146 int x, int y, | |
| 147 const gfx::Rect& src_rect, | |
| 148 gfx::Rect* invalidated_rect); | |
| 149 void ExecuteScroll(const gfx::Rect& clip, int dx, int dy, | |
| 150 gfx::Rect* invalidated_rect); | |
| 151 void ExecuteReplaceContents(PPB_ImageData_Impl* image, | |
| 152 gfx::Rect* invalidated_rect, | |
| 153 PP_Resource* old_image_data); | |
| 154 | |
| 155 // Schedules the offscreen callback to be fired at a future time. This | |
| 156 // will add the given item to the offscreen_flush_callbacks_ vector. | |
| 157 void ScheduleOffscreenCallback(const FlushCallbackData& callback); | |
| 158 | |
| 159 // Function scheduled to execute by ScheduleOffscreenCallback that actually | |
| 160 // issues the offscreen callbacks. | |
| 161 void ExecuteOffscreenCallback(FlushCallbackData data); | |
| 162 | |
| 163 // Returns true if there is any type of flush callback pending. | |
| 164 bool HasPendingFlush() const; | |
| 165 | |
| 166 scoped_refptr<PPB_ImageData_Impl> image_data_; | |
| 167 | |
| 168 // Non-owning pointer to the plugin instance this context is currently bound | |
| 169 // to, if any. If the context is currently unbound, this will be NULL. | |
| 170 PluginInstance* bound_instance_; | |
| 171 | |
| 172 // Keeps track of all drawing commands queued before a Flush call. | |
| 173 struct QueuedOperation; | |
| 174 typedef std::vector<QueuedOperation> OperationQueue; | |
| 175 OperationQueue queued_operations_; | |
| 176 | |
| 177 // The plugin can give us one "Flush" at a time. This flush will either be in | |
| 178 // the "unpainted" state (in which case unpainted_flush_callback_ will be | |
| 179 // non-NULL) or painted, in which case painted_flush_callback_ will be | |
| 180 // non-NULL). There can also be an offscreen callback which is handled | |
| 181 // separately (see offscreen_callback_pending_). Only one of these three | |
| 182 // things may be set at a time to enforce the "only one pending flush at a | |
| 183 // time" constraint. | |
| 184 // | |
| 185 // "Unpainted" ones are flush requests which have never been painted. These | |
| 186 // could have been done while the RenderView was already waiting for an ACK | |
| 187 // from a previous paint, so won't generate a new one yet. | |
| 188 // | |
| 189 // "Painted" ones are those flushes that have been painted by RenderView, but | |
| 190 // for which the ACK from the browser has not yet been received. | |
| 191 // | |
| 192 // When we get updates from a plugin with a callback, it is first added to | |
| 193 // the unpainted callbacks. When the renderer has initiated the paint, we move | |
| 194 // it to the painted callback. When the renderer receives a flush, we execute | |
| 195 // and clear the painted callback. This helps avoid the callback being called | |
| 196 // prematurely in response to flush notifications for a previous update. | |
| 197 FlushCallbackData unpainted_flush_callback_; | |
| 198 FlushCallbackData painted_flush_callback_; | |
| 199 | |
| 200 // When doing offscreen flushes, we issue a task that issues the callback | |
| 201 // later. This is set when one of those tasks is pending so that we can | |
| 202 // enforce the "only one pending flush at a time" constraint in the API. | |
| 203 bool offscreen_flush_pending_; | |
| 204 | |
| 205 // Set to true if the plugin declares that this device will always be opaque. | |
| 206 // This allows us to do more optimized painting in some cases. | |
| 207 bool is_always_opaque_; | |
| 208 | |
| 209 // Set to the scale between what the plugin considers to be one pixel and one | |
| 210 // DIP | |
| 211 float scale_; | |
| 212 | |
| 213 base::WeakPtrFactory<PPB_Graphics2D_Impl> weak_ptr_factory_; | |
| 214 | |
| 215 friend class content::PepperGraphics2DHost; | |
| 216 DISALLOW_COPY_AND_ASSIGN(PPB_Graphics2D_Impl); | |
| 217 }; | |
| 218 | |
| 219 } // namespace ppapi | |
| 220 } // namespace webkit | |
| 221 | |
| 222 #endif // WEBKIT_PLUGINS_PPAPI_PPB_GRAPHICS_2D_IMPL_H_ | |
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Chromium Code Reviews
Issue 14386009:
Remove vestigal in-process PPB_Graphics2D impl. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src