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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrFragmentProcessor_DEFINED | 8 #ifndef GrFragmentProcessor_DEFINED |
9 #define GrFragmentProcessor_DEFINED | 9 #define GrFragmentProcessor_DEFINED |
10 | 10 |
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58 * series. The original input is passed to the first, the first's output is
passed to the | 58 * series. The original input is passed to the first, the first's output is
passed to the |
59 * second, etc. The output of the returned processor is the output of the la
st processor of the | 59 * second, etc. The output of the returned processor is the output of the la
st processor of the |
60 * series. | 60 * series. |
61 * | 61 * |
62 * The array elements with be moved. | 62 * The array elements with be moved. |
63 */ | 63 */ |
64 static sk_sp<GrFragmentProcessor> RunInSeries(sk_sp<GrFragmentProcessor>*, i
nt cnt); | 64 static sk_sp<GrFragmentProcessor> RunInSeries(sk_sp<GrFragmentProcessor>*, i
nt cnt); |
65 | 65 |
66 GrFragmentProcessor() | 66 GrFragmentProcessor() |
67 : INHERITED() | 67 : INHERITED() |
| 68 , fUsesDistanceVectorField(false) |
68 , fUsesLocalCoords(false) | 69 , fUsesLocalCoords(false) |
69 , fNumTexturesExclChildren(0) | 70 , fNumTexturesExclChildren(0) |
70 , fNumBuffersExclChildren(0) | 71 , fNumBuffersExclChildren(0) |
71 , fNumTransformsExclChildren(0) {} | 72 , fNumTransformsExclChildren(0) {} |
72 | 73 |
73 ~GrFragmentProcessor() override; | 74 ~GrFragmentProcessor() override; |
74 | 75 |
75 GrGLSLFragmentProcessor* createGLSLInstance() const; | 76 GrGLSLFragmentProcessor* createGLSLInstance() const; |
76 | 77 |
77 void getGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) c
onst { | 78 void getGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) c
onst { |
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103 } | 104 } |
104 } | 105 } |
105 | 106 |
106 int numChildProcessors() const { return fChildProcessors.count(); } | 107 int numChildProcessors() const { return fChildProcessors.count(); } |
107 | 108 |
108 const GrFragmentProcessor& childProcessor(int index) const { return *fChildP
rocessors[index]; } | 109 const GrFragmentProcessor& childProcessor(int index) const { return *fChildP
rocessors[index]; } |
109 | 110 |
110 /** Do any of the coordtransforms for this processor require local coords? *
/ | 111 /** Do any of the coordtransforms for this processor require local coords? *
/ |
111 bool usesLocalCoords() const { return fUsesLocalCoords; } | 112 bool usesLocalCoords() const { return fUsesLocalCoords; } |
112 | 113 |
| 114 /** Does this FP need a vector to the nearest edge? */ |
| 115 bool usesDistanceVectorField() const { return fUsesDistanceVectorField; } |
| 116 |
113 /** Returns true if this and other processor conservatively draw identically
. It can only return | 117 /** Returns true if this and other processor conservatively draw identically
. It can only return |
114 true when the two processor are of the same subclass (i.e. they return t
he same object from | 118 true when the two processor are of the same subclass (i.e. they return t
he same object from |
115 from getFactory()). | 119 from getFactory()). |
116 | 120 |
117 A return value of true from isEqual() should not be used to test whether
the processor would | 121 A return value of true from isEqual() should not be used to test whether
the processor would |
118 generate the same shader code. To test for identical code generation use
getGLSLProcessorKey | 122 generate the same shader code. To test for identical code generation use
getGLSLProcessorKey |
119 */ | 123 */ |
120 bool isEqual(const GrFragmentProcessor& that, bool ignoreCoordTransforms) co
nst; | 124 bool isEqual(const GrFragmentProcessor& that, bool ignoreCoordTransforms) co
nst; |
121 | 125 |
122 /** | 126 /** |
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166 int registerChildProcessor(sk_sp<GrFragmentProcessor> child); | 170 int registerChildProcessor(sk_sp<GrFragmentProcessor> child); |
167 | 171 |
168 /** | 172 /** |
169 * Subclass implements this to support getConstantColorComponents(...). | 173 * Subclass implements this to support getConstantColorComponents(...). |
170 * | 174 * |
171 * Note: it's up to the subclass implementation to do any recursive call to
compute the child | 175 * Note: it's up to the subclass implementation to do any recursive call to
compute the child |
172 * procs' output invariants; computeInvariantOutput will not be recursive. | 176 * procs' output invariants; computeInvariantOutput will not be recursive. |
173 */ | 177 */ |
174 virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const = 0; | 178 virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const = 0; |
175 | 179 |
| 180 /* Sub-classes should set this to true in their constructors if they need ac
cess to a distance |
| 181 * vector field to the nearest edge |
| 182 */ |
| 183 bool fUsesDistanceVectorField; |
| 184 |
176 private: | 185 private: |
177 void notifyRefCntIsZero() const final; | 186 void notifyRefCntIsZero() const final; |
178 | 187 |
179 /** Returns a new instance of the appropriate *GL* implementation class | 188 /** Returns a new instance of the appropriate *GL* implementation class |
180 for the given GrFragmentProcessor; caller is responsible for deleting | 189 for the given GrFragmentProcessor; caller is responsible for deleting |
181 the object. */ | 190 the object. */ |
182 virtual GrGLSLFragmentProcessor* onCreateGLSLInstance() const = 0; | 191 virtual GrGLSLFragmentProcessor* onCreateGLSLInstance() const = 0; |
183 | 192 |
184 /** Implemented using GLFragmentProcessor::GenKey as described in this class
's comment. */ | 193 /** Implemented using GLFragmentProcessor::GenKey as described in this class
's comment. */ |
185 virtual void onGetGLSLProcessorKey(const GrGLSLCaps& caps, | 194 virtual void onGetGLSLProcessorKey(const GrGLSLCaps& caps, |
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228 /** | 237 /** |
229 * This is not SkSTArray<1, sk_sp<GrFragmentProcessor>> because this class h
olds strong | 238 * This is not SkSTArray<1, sk_sp<GrFragmentProcessor>> because this class h
olds strong |
230 * references until notifyRefCntIsZero and then it holds pending executions. | 239 * references until notifyRefCntIsZero and then it holds pending executions. |
231 */ | 240 */ |
232 SkSTArray<1, GrFragmentProcessor*, true> fChildProcessors; | 241 SkSTArray<1, GrFragmentProcessor*, true> fChildProcessors; |
233 | 242 |
234 typedef GrProcessor INHERITED; | 243 typedef GrProcessor INHERITED; |
235 }; | 244 }; |
236 | 245 |
237 #endif | 246 #endif |
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