third_party/WebKit/public/platform/WebDisplayItemList.h

   1 // Copyright 2014 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 WebDisplayItemList_h
   6 #define WebDisplayItemList_h
   7
   8 #include "WebBlendMode.h"
   9 #include "WebFloatPoint.h"
  10 #include "WebFloatRect.h"
  11 #include "WebRect.h"
  12 #include "WebSize.h"
  13 #include "WebVector.h"
  14
  15 #include "third_party/skia/include/core/SkColorFilter.h"
  16 #include "third_party/skia/include/core/SkRRect.h"
  17 #include "third_party/skia/include/core/SkRegion.h"
  18 #include "third_party/skia/include/core/SkXfermode.h"
  19 #include "third_party/skia/include/utils/SkMatrix44.h"
  20
  21 class SkImageFilter;
  22 class SkMatrix44;
  23 class SkPicture;
  24
  25 namespace blink {
  26 class WebFilterOperations;
  27
  28 // An ordered list of items representing content to be rendered (stored in
  29 // 'drawing' items) and operations to be performed when rendering this content
  30 // (stored in 'clip', 'transform', 'filter', etc...). For more details see:
  31 // http://dev.chromium.org/blink/slimming-paint.
  32 class WebDisplayItemList {
  33 public:
  34     virtual ~WebDisplayItemList() { }
  35
  36     // This grabs a ref on the passed-in SkPicture.
  37     virtual void appendDrawingItem(const SkPicture*) { }
  38
  39     virtual void appendClipItem(const WebRect&, const WebVector<SkRRect>&) { }
  40     virtual void appendEndClipItem() { }
  41     virtual void appendClipPathItem(const SkPath&, SkRegion::Op, bool antialias) { }
  42     virtual void appendEndClipPathItem() { }
  43     virtual void appendFloatClipItem(const WebFloatRect&) { }
  44     virtual void appendEndFloatClipItem() { }
  45     virtual void appendTransformItem(const SkMatrix44&) { }
  46     virtual void appendEndTransformItem() { }
  47     virtual void appendCompositingItem(float opacity,
  48         SkXfermode::Mode, SkRect* bounds, SkColorFilter*) { }
  49     virtual void appendEndCompositingItem() { }
  50
  51     virtual void appendFilterItem(const WebFilterOperations&, const WebFloatRect& bounds) { }
  52     virtual void appendEndFilterItem() { }
  53
  54     // Scroll containers are identified by an opaque pointer.
  55     using ScrollContainerId = const void*;
  56     virtual void appendScrollItem(const WebSize& scrollOffset, ScrollContainerId) { }
  57     virtual void appendEndScrollItem() { }
  58 };
  59
  60 } // namespace blink
  61
  62 #endif // WebDisplayItemList_h
  63