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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 GrGLFragmentShaderBuilder_DEFINED | 8 #ifndef GrGLFragmentShaderBuilder_DEFINED |
9 #define GrGLFragmentShaderBuilder_DEFINED | 9 #define GrGLFragmentShaderBuilder_DEFINED |
10 | 10 |
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50 is in device space (e.g. 0,0 is the top left and pixel centers are at ha
lf-integers). */ | 50 is in device space (e.g. 0,0 is the top left and pixel centers are at ha
lf-integers). */ |
51 virtual const char* fragmentPosition() = 0; | 51 virtual const char* fragmentPosition() = 0; |
52 | 52 |
53 /** | 53 /** |
54 * Fragment procs with child procs should call these functions before/after
calling emitCode | 54 * Fragment procs with child procs should call these functions before/after
calling emitCode |
55 * on a child proc. | 55 * on a child proc. |
56 */ | 56 */ |
57 void onBeforeChildProcEmitCode(); | 57 void onBeforeChildProcEmitCode(); |
58 void onAfterChildProcEmitCode(); | 58 void onAfterChildProcEmitCode(); |
59 | 59 |
60 int getChildNumberThisLevel() const { | |
61 if (fSubstageIndices.count() > 1) { | |
62 // second-to-last value in the fSubstageIndices stack is the index o
f the child proc | |
63 // at that level which is currently emitting code. | |
64 return fSubstageIndices[fSubstageIndices.count() - 2]; | |
65 } | |
66 return -1; | |
67 } | |
68 | |
69 const SkString& getMangleString() const { return fMangleString; } | 60 const SkString& getMangleString() const { return fMangleString; } |
70 | 61 |
71 SkString getMangleStringThisLevel() const { | |
72 SkString ret; | |
73 int childNumber = this->getChildNumberThisLevel(); | |
74 if (childNumber >= 0) { | |
75 ret.printf("_c%d", childNumber); | |
76 } | |
77 return ret; | |
78 } | |
79 | |
80 private: | 62 private: |
81 /* | 63 /* |
82 * State that tracks which child proc in the proc tree is currently emitting
code. This is | 64 * State that tracks which child proc in the proc tree is currently emitting
code. This is |
83 * used to update the fMangleString, which is used to mangle the names of un
iforms and functions | 65 * used to update the fMangleString, which is used to mangle the names of un
iforms and functions |
84 * emitted by the proc. fSubstageIndices is a stack: its count indicates ho
w many levels deep | 66 * emitted by the proc. fSubstageIndices is a stack: its count indicates ho
w many levels deep |
85 * we are in the tree, and its second-to-last value is the index of the chil
d proc at that | 67 * we are in the tree, and its second-to-last value is the index of the chil
d proc at that |
86 * level which is currently emitting code. For example, if fSubstageIndices
= [3, 1, 2, 0], that | 68 * level which is currently emitting code. For example, if fSubstageIndices
= [3, 1, 2, 0], that |
87 * means we're currently emitting code for the base proc's 3rd child's 1st c
hild's 2nd child. | 69 * means we're currently emitting code for the base proc's 3rd child's 1st c
hild's 2nd child. |
88 */ | 70 */ |
89 SkTArray<int> fSubstageIndices; | 71 SkTArray<int> fSubstageIndices; |
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212 // the program creator | 194 // the program creator |
213 bool fHasReadDstColor; | 195 bool fHasReadDstColor; |
214 bool fHasReadFragmentPosition; | 196 bool fHasReadFragmentPosition; |
215 | 197 |
216 friend class GrGLProgramBuilder; | 198 friend class GrGLProgramBuilder; |
217 | 199 |
218 typedef GrGLXPFragmentBuilder INHERITED; | 200 typedef GrGLXPFragmentBuilder INHERITED; |
219 }; | 201 }; |
220 | 202 |
221 #endif | 203 #endif |
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