1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #ifndef GrRenderTargetContextPriv_DEFINED
9 #define GrRenderTargetContextPriv_DEFINED
10
11 #include "GrRenderTargetContext.h"
12 #include "GrRenderTargetOpList.h"
13 #include "GrPathRendering.h"
14
15 class GrFixedClip;
16 class GrHardClip;
17 class GrPath;
18 class GrRenderTargetPriv;
19 struct GrUserStencilSettings;
20
21 /** Class that adds methods to GrRenderTargetContext that are only intended for use internal to
22 Skia. This class is purely a privileged window into GrRenderTargetContext. It should never have
23 additional data members or virtual methods. */
24 class GrRenderTargetContextPriv {
25 public:
26 // called to note the last clip drawn to the stencil buffer.
27 // TODO: remove after clipping overhaul.
setLastClip(uint32_t clipStackGenID,const SkIRect & devClipBounds,int numClipAnalyticFPs)28 void setLastClip(uint32_t clipStackGenID, const SkIRect& devClipBounds,
29 int numClipAnalyticFPs) {
30 GrRenderTargetOpList* opList = fRenderTargetContext->getRTOpList();
31 opList->fLastClipStackGenID = clipStackGenID;
32 opList->fLastDevClipBounds = devClipBounds;
33 opList->fLastClipNumAnalyticFPs = numClipAnalyticFPs;
34 }
35
36 // called to determine if we have to render the clip into SB.
37 // TODO: remove after clipping overhaul.
mustRenderClip(uint32_t clipStackGenID,const SkIRect & devClipBounds,int numClipAnalyticFPs)38 bool mustRenderClip(uint32_t clipStackGenID, const SkIRect& devClipBounds,
39 int numClipAnalyticFPs) const {
40 GrRenderTargetOpList* opList = fRenderTargetContext->getRTOpList();
41 return opList->fLastClipStackGenID != clipStackGenID ||
42 !opList->fLastDevClipBounds.contains(devClipBounds) ||
43 opList->fLastClipNumAnalyticFPs != numClipAnalyticFPs;
44 }
45
46 using CanClearFullscreen = GrRenderTargetContext::CanClearFullscreen;
47
48 void clear(const GrFixedClip&, const GrColor, CanClearFullscreen);
49
50 void clearStencilClip(const GrFixedClip&, bool insideStencilMask);
51
52 /*
53 * Some portions of the code, which use approximate-match rendertargets (i.e., ImageFilters),
54 * rely on clears that lie outside of the content region to still have an effect.
55 * For example, when sampling a decimated blurred image back up to full size, the GaussianBlur
56 * code draws 1-pixel rects along the left and bottom edges to be able to use bilerp for
57 * upsampling. The "absClear" entry point ignores the content bounds but does use the
58 * worst case (instantiated) bounds.
59 *
60 * @param rect if (!null) the rect to clear, otherwise it is a full screen clear
61 * @param color the color to clear to
62 */
63 void absClear(const SkIRect* rect, const GrColor color);
64
65 void stencilRect(const GrHardClip&,
66 const GrUserStencilSettings* ss,
67 GrAAType,
68 const SkMatrix& viewMatrix,
69 const SkRect& rect);
70
71 void stencilPath(const GrHardClip&, GrAAType, const SkMatrix& viewMatrix, const GrPath*);
72
73 /**
74 * Draws a rect, either AA or not, and touches the stencil buffer with the user stencil settings
75 * for each color sample written.
76 */
77 bool drawAndStencilRect(const GrHardClip&,
78 const GrUserStencilSettings*,
79 SkRegion::Op op,
80 bool invert,
81 GrAA,
82 const SkMatrix& viewMatrix,
83 const SkRect&);
84
85 /**
86 * Draws a path, either AA or not, and touches the stencil buffer with the user stencil settings
87 * for each color sample written.
88 */
89 bool drawAndStencilPath(const GrHardClip&,
90 const GrUserStencilSettings*,
91 SkRegion::Op op,
92 bool invert,
93 GrAA,
94 const SkMatrix& viewMatrix,
95 const SkPath&);
96
97 SkBudgeted isBudgeted() const;
98
99 int maxWindowRectangles() const;
100
101 /*
102 * This unique ID will not change for a given RenderTargetContext. However, it is _NOT_
103 * guaranteed to match the uniqueID of the underlying GrRenderTarget - beware!
104 */
uniqueID()105 GrSurfaceProxy::UniqueID uniqueID() const {
106 return fRenderTargetContext->fRenderTargetProxy->uniqueID();
107 }
108
109 uint32_t testingOnly_getOpListID();
110 uint32_t testingOnly_addDrawOp(std::unique_ptr<GrDrawOp>);
111 uint32_t testingOnly_addDrawOp(const GrClip&, std::unique_ptr<GrDrawOp>);
112
refsWrappedObjects()113 bool refsWrappedObjects() const {
114 return fRenderTargetContext->fRenderTargetProxy->refsWrappedObjects();
115 }
116
117 private:
GrRenderTargetContextPriv(GrRenderTargetContext * renderTargetContext)118 explicit GrRenderTargetContextPriv(GrRenderTargetContext* renderTargetContext)
119 : fRenderTargetContext(renderTargetContext) {}
GrRenderTargetContextPriv(const GrRenderTargetPriv &)120 GrRenderTargetContextPriv(const GrRenderTargetPriv&) {} // unimpl
121 GrRenderTargetContextPriv& operator=(const GrRenderTargetPriv&); // unimpl
122
123 // No taking addresses of this type.
124 const GrRenderTargetContextPriv* operator&() const;
125 GrRenderTargetContextPriv* operator&();
126
127 GrRenderTargetContext* fRenderTargetContext;
128
129 friend class GrRenderTargetContext; // to construct/copy this type.
130 };
131
priv()132 inline GrRenderTargetContextPriv GrRenderTargetContext::priv() {
133 return GrRenderTargetContextPriv(this);
134 }
135
priv()136 inline const GrRenderTargetContextPriv GrRenderTargetContext::priv() const {
137 return GrRenderTargetContextPriv(const_cast<GrRenderTargetContext*>(this));
138 }
139
140 #endif
141