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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 GrTextureMaker_DEFINED | 8 #ifndef GrTextureMaker_DEFINED |
9 #define GrTextureMaker_DEFINED | 9 #define GrTextureMaker_DEFINED |
10 | 10 |
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63 const SkMatrix& textureMatrix, | 63 const SkMatrix& textureMatrix, |
64 const SkRect& constraintRect, | 64 const SkRect& constraintRect, |
65 FilterConstraint filterConstraint, | 65 FilterConstraint filterConstraint, |
66 bool coordsLimitedToConstraintRect, | 66 bool coordsLimitedToConstraintRect, |
67 const GrTextureParams::FilterMode* filterOrN
ullForBicubic) = 0; | 67 const GrTextureParams::FilterMode* filterOrN
ullForBicubic) = 0; |
68 | 68 |
69 virtual ~GrTextureProducer() {} | 69 virtual ~GrTextureProducer() {} |
70 | 70 |
71 int width() const { return fWidth; } | 71 int width() const { return fWidth; } |
72 int height() const { return fHeight; } | 72 int height() const { return fHeight; } |
| 73 bool isAlphaOnly() const { return fIsAlphaOnly; } |
73 | 74 |
74 protected: | 75 protected: |
75 GrTextureProducer(int width, int height) : fWidth(width), fHeight(height) {} | 76 GrTextureProducer(int width, int height, bool isAlphaOnly) |
| 77 : fWidth(width) |
| 78 , fHeight(height) |
| 79 , fIsAlphaOnly(isAlphaOnly) {} |
76 | 80 |
77 /** Helper for creating a key for a copy from an original key. */ | 81 /** Helper for creating a key for a copy from an original key. */ |
78 static void MakeCopyKeyFromOrigKey(const GrUniqueKey& origKey, | 82 static void MakeCopyKeyFromOrigKey(const GrUniqueKey& origKey, |
79 const CopyParams& copyParams, | 83 const CopyParams& copyParams, |
80 GrUniqueKey* copyKey) { | 84 GrUniqueKey* copyKey) { |
81 SkASSERT(!copyKey->isValid()); | 85 SkASSERT(!copyKey->isValid()); |
82 if (origKey.isValid()) { | 86 if (origKey.isValid()) { |
83 static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDoma
in(); | 87 static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDoma
in(); |
84 GrUniqueKey::Builder builder(copyKey, origKey, kDomain, 3); | 88 GrUniqueKey::Builder builder(copyKey, origKey, kDomain, 3); |
85 builder[0] = copyParams.fFilter; | 89 builder[0] = copyParams.fFilter; |
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97 virtual void makeCopyKey(const CopyParams&, GrUniqueKey* copyKey) = 0; | 101 virtual void makeCopyKey(const CopyParams&, GrUniqueKey* copyKey) = 0; |
98 | 102 |
99 /** | 103 /** |
100 * If a stretched version of the texture is generated, it may be cached (ass
uming that | 104 * If a stretched version of the texture is generated, it may be cached (ass
uming that |
101 * makeCopyKey() returns true). In that case, the maker is notified in case
it | 105 * makeCopyKey() returns true). In that case, the maker is notified in case
it |
102 * wants to note that for when the maker is destroyed. | 106 * wants to note that for when the maker is destroyed. |
103 */ | 107 */ |
104 virtual void didCacheCopy(const GrUniqueKey& copyKey) = 0; | 108 virtual void didCacheCopy(const GrUniqueKey& copyKey) = 0; |
105 | 109 |
106 private: | 110 private: |
107 const int fWidth; | 111 const int fWidth; |
108 const int fHeight; | 112 const int fHeight; |
| 113 const bool fIsAlphaOnly; |
109 | 114 |
110 typedef SkNoncopyable INHERITED; | 115 typedef SkNoncopyable INHERITED; |
111 }; | 116 }; |
112 | 117 |
113 /** | 118 /** |
114 * Base class for sources that start out as textures. Optionally allows for a co
ntent area subrect. | 119 * Base class for sources that start out as textures. Optionally allows for a co
ntent area subrect. |
115 * The intent is not to use content area for subrect rendering. Rather, the pixe
ls outside the | 120 * The intent is not to use content area for subrect rendering. Rather, the pixe
ls outside the |
116 * content area have undefined values and shouldn't be read *regardless* of filt
ering mode or | 121 * content area have undefined values and shouldn't be read *regardless* of filt
ering mode or |
117 * the SkCanvas::SrcRectConstraint used for subrect draws. | 122 * the SkCanvas::SrcRectConstraint used for subrect draws. |
118 */ | 123 */ |
119 class GrTextureAdjuster : public GrTextureProducer { | 124 class GrTextureAdjuster : public GrTextureProducer { |
120 public: | 125 public: |
121 /** Makes the subset of the texture safe to use with the given texture param
eters. | 126 /** Makes the subset of the texture safe to use with the given texture param
eters. |
122 outOffset will be the top-left corner of the subset if a copy is not mad
e. Otherwise, | 127 outOffset will be the top-left corner of the subset if a copy is not mad
e. Otherwise, |
123 the copy will be tight to the contents and outOffset will be (0, 0). If
the copy's size | 128 the copy will be tight to the contents and outOffset will be (0, 0). If
the copy's size |
124 does not match subset's dimensions then the contents are scaled to fit t
he copy.*/ | 129 does not match subset's dimensions then the contents are scaled to fit t
he copy.*/ |
125 GrTexture* refTextureSafeForParams(const GrTextureParams&, SkIPoint* outOffs
et); | 130 GrTexture* refTextureSafeForParams(const GrTextureParams&, SkIPoint* outOffs
et); |
126 | 131 |
127 const GrFragmentProcessor* createFragmentProcessor( | 132 const GrFragmentProcessor* createFragmentProcessor( |
128 const SkMatrix& textureMatrix, | 133 const SkMatrix& textureMatrix, |
129 const SkRect& constraintRect, | 134 const SkRect& constraintRect, |
130 FilterConstraint, | 135 FilterConstraint, |
131 bool coordsLimitedToConstraintRect, | 136 bool coordsLimitedToConstraintRect, |
132 const GrTextureParams::FilterMode* filterOrNullF
orBicubic) override; | 137 const GrTextureParams::FilterMode* filterOrNullF
orBicubic) override; |
133 | 138 |
134 protected: | 139 protected: |
135 /** The whole texture is content. */ | 140 /** The whole texture is content. */ |
136 explicit GrTextureAdjuster(GrTexture* original) | 141 explicit GrTextureAdjuster(GrTexture* original, bool isAlphaOnly) |
137 : INHERITED(original->width(), original->height()) | 142 : INHERITED(original->width(), original->height(), isAlphaOnly) |
138 , fOriginal(original) {} | 143 , fOriginal(original) {} |
139 | 144 |
140 GrTextureAdjuster(GrTexture* original, const SkIRect& contentArea); | 145 GrTextureAdjuster(GrTexture* original, const SkIRect& contentArea, bool isAl
phaOnly); |
141 | 146 |
142 GrTexture* originalTexture() const { return fOriginal; } | 147 GrTexture* originalTexture() const { return fOriginal; } |
143 | 148 |
144 /** Returns the content area or null for the whole original texture */ | 149 /** Returns the content area or null for the whole original texture */ |
145 const SkIRect* contentAreaOrNull() { return fContentArea.getMaybeNull(); } | 150 const SkIRect* contentAreaOrNull() { return fContentArea.getMaybeNull(); } |
146 | 151 |
147 private: | 152 private: |
148 SkTLazy<SkIRect> fContentArea; | 153 SkTLazy<SkIRect> fContentArea; |
149 GrTexture* fOriginal; | 154 GrTexture* fOriginal; |
150 | 155 |
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163 GrTexture* refTextureForParams(const GrTextureParams&); | 168 GrTexture* refTextureForParams(const GrTextureParams&); |
164 | 169 |
165 const GrFragmentProcessor* createFragmentProcessor( | 170 const GrFragmentProcessor* createFragmentProcessor( |
166 const SkMatrix& textureMatrix, | 171 const SkMatrix& textureMatrix, |
167 const SkRect& constraintRect, | 172 const SkRect& constraintRect, |
168 FilterConstraint filterConstraint, | 173 FilterConstraint filterConstraint, |
169 bool coordsLimitedToConstraintRect, | 174 bool coordsLimitedToConstraintRect, |
170 const GrTextureParams::FilterMode* filterOrNullF
orBicubic) override; | 175 const GrTextureParams::FilterMode* filterOrNullF
orBicubic) override; |
171 | 176 |
172 protected: | 177 protected: |
173 GrTextureMaker(GrContext* context, int width, int height) | 178 GrTextureMaker(GrContext* context, int width, int height, bool isAlphaOnly) |
174 : INHERITED(width, height) | 179 : INHERITED(width, height, isAlphaOnly) |
175 , fContext(context) {} | 180 , fContext(context) {} |
176 | 181 |
177 /** | 182 /** |
178 * Return the maker's "original" texture. It is the responsibility of the m
aker to handle any | 183 * Return the maker's "original" texture. It is the responsibility of the m
aker to handle any |
179 * caching of the original if desired. | 184 * caching of the original if desired. |
180 */ | 185 */ |
181 virtual GrTexture* refOriginalTexture() = 0; | 186 virtual GrTexture* refOriginalTexture() = 0; |
182 | 187 |
183 /** | 188 /** |
184 * Return a new (uncached) texture that is the stretch of the maker's origi
nal. | 189 * Return a new (uncached) texture that is the stretch of the maker's origi
nal. |
185 * | 190 * |
186 * The base-class handles general logic for this, and only needs access to
the following | 191 * The base-class handles general logic for this, and only needs access to
the following |
187 * method: | 192 * method: |
188 * - refOriginalTexture() | 193 * - refOriginalTexture() |
189 * | 194 * |
190 * Subclass may override this if they can handle creating the texture more
directly than | 195 * Subclass may override this if they can handle creating the texture more
directly than |
191 * by copying. | 196 * by copying. |
192 */ | 197 */ |
193 virtual GrTexture* generateTextureForParams(const CopyParams&); | 198 virtual GrTexture* generateTextureForParams(const CopyParams&); |
194 | 199 |
195 GrContext* context() const { return fContext; } | 200 GrContext* context() const { return fContext; } |
196 | 201 |
197 private: | 202 private: |
198 GrContext* fContext; | 203 GrContext* fContext; |
199 | 204 |
200 typedef GrTextureProducer INHERITED; | 205 typedef GrTextureProducer INHERITED; |
201 }; | 206 }; |
202 | 207 |
203 #endif | 208 #endif |
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