gfx/skia/trunk/src/gpu/effects/GrConvexPolyEffect.h@129ffea94266
gfx/skia/trunk/src/gpu/effects/GrConvexPolyEffect.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright 2014 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 */
8 #ifndef GrConvexPolyEffect_DEFINED
9 #define GrConvexPolyEffect_DEFINED
11 #include "GrDrawTargetCaps.h"
12 #include "GrEffect.h"
13 #include "GrTypesPriv.h"
15 class GrGLConvexPolyEffect;
16 class SkPath;
18 /**
19 * An effect that renders a convex polygon. It is intended to be used as a coverage effect.
20 * Bounding geometry is rendered and the effect computes coverage based on the fragment's
21 * position relative to the polygon.
22 */
23 class GrConvexPolyEffect : public GrEffect {
24 public:
25 enum {
26 kMaxEdges = 8,
27 };
29 /**
30 * edges is a set of n edge equations where n is limited to kMaxEdges. It contains 3*n values.
31 * The edges should form a convex polygon. The positive half-plane is considered to be the
32 * inside. The equations should be normalized such that the first two coefficients are a unit
33 * 2d vector.
34 *
35 * Currently the edges are specified in device space. In the future we may prefer to specify
36 * them in src space. There are a number of ways this could be accomplished but we'd probably
37 * have to modify the effect/shaderbuilder interface to make it possible (e.g. give access
38 * to the view matrix or untransformed positions in the fragment shader).
39 */
40 static GrEffectRef* Create(GrEffectEdgeType edgeType, int n, const SkScalar edges[]) {
41 if (n <= 0 || n > kMaxEdges || kHairlineAA_GrEffectEdgeType == edgeType) {
42 return NULL;
43 }
44 return CreateEffectRef(AutoEffectUnref(SkNEW_ARGS(GrConvexPolyEffect,
45 (edgeType, n, edges))));
46 }
48 /**
49 * Creates an effect that clips against the path. If the path is not a convex polygon, is
50 * inverse filled, or has too many edges, this will return NULL. If offset is non-NULL, then
51 * the path is translated by the vector.
52 */
53 static GrEffectRef* Create(GrEffectEdgeType, const SkPath&, const SkVector* offset = NULL);
55 /**
56 * Creates an effect that fills inside the rect with AA edges..
57 */
58 static GrEffectRef* Create(GrEffectEdgeType, const SkRect&);
60 virtual ~GrConvexPolyEffect();
62 static const char* Name() { return "ConvexPoly"; }
64 GrEffectEdgeType getEdgeType() const { return fEdgeType; }
66 int getEdgeCount() const { return fEdgeCount; }
68 const SkScalar* getEdges() const { return fEdges; }
70 typedef GrGLConvexPolyEffect GLEffect;
72 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
74 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
76 private:
77 GrConvexPolyEffect(GrEffectEdgeType edgeType, int n, const SkScalar edges[]);
79 virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE;
81 GrEffectEdgeType fEdgeType;
82 int fEdgeCount;
83 SkScalar fEdges[3 * kMaxEdges];
85 GR_DECLARE_EFFECT_TEST;
87 typedef GrEffect INHERITED;
88 };
91 #endif
