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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 #include "SkPictureShader.h" | 8 #include "SkPictureShader.h" |
9 | 9 |
10 #include "SkBitmap.h" | 10 #include "SkBitmap.h" |
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153 // Use a rotation-invariant scale | 153 // Use a rotation-invariant scale |
154 SkPoint scale; | 154 SkPoint scale; |
155 if (!SkDecomposeUpper2x2(m, NULL, &scale, NULL)) { | 155 if (!SkDecomposeUpper2x2(m, NULL, &scale, NULL)) { |
156 // Decomposition failed, use an approximation. | 156 // Decomposition failed, use an approximation. |
157 scale.set(SkScalarSqrt(m.getScaleX() * m.getScaleX() + m.getSkewX() * m.
getSkewX()), | 157 scale.set(SkScalarSqrt(m.getScaleX() * m.getScaleX() + m.getSkewX() * m.
getSkewX()), |
158 SkScalarSqrt(m.getScaleY() * m.getScaleY() + m.getSkewY() * m.
getSkewY())); | 158 SkScalarSqrt(m.getScaleY() * m.getScaleY() + m.getSkewY() * m.
getSkewY())); |
159 } | 159 } |
160 SkSize scaledSize = SkSize::Make(SkScalarAbs(scale.x() * fTile.width()), | 160 SkSize scaledSize = SkSize::Make(SkScalarAbs(scale.x() * fTile.width()), |
161 SkScalarAbs(scale.y() * fTile.height())); | 161 SkScalarAbs(scale.y() * fTile.height())); |
162 | 162 |
163 // Clamp the tile size to about 16M pixels | 163 // Clamp the tile size to about 4M pixels |
164 static const SkScalar kMaxTileArea = 4096 * 4096; | 164 static const SkScalar kMaxTileArea = 2048 * 2048; |
165 SkScalar tileArea = SkScalarMul(scaledSize.width(), scaledSize.height()); | 165 SkScalar tileArea = SkScalarMul(scaledSize.width(), scaledSize.height()); |
166 if (tileArea > kMaxTileArea) { | 166 if (tileArea > kMaxTileArea) { |
167 SkScalar clampScale = SkScalarSqrt(SkScalarDiv(kMaxTileArea, tileArea)); | 167 SkScalar clampScale = SkScalarSqrt(SkScalarDiv(kMaxTileArea, tileArea)); |
168 scaledSize.set(SkScalarMul(scaledSize.width(), clampScale), | 168 scaledSize.set(SkScalarMul(scaledSize.width(), clampScale), |
169 SkScalarMul(scaledSize.height(), clampScale)); | 169 SkScalarMul(scaledSize.height(), clampScale)); |
170 } | 170 } |
171 | 171 |
172 SkISize tileSize = scaledSize.toRound(); | 172 SkISize tileSize = scaledSize.toRound(); |
173 if (tileSize.isEmpty()) { | 173 if (tileSize.isEmpty()) { |
174 return NULL; | 174 return NULL; |
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303 return bitmapShader->asFragmentProcessor(context, paint, viewM, NULL, paintC
olor, fp); | 303 return bitmapShader->asFragmentProcessor(context, paint, viewM, NULL, paintC
olor, fp); |
304 } | 304 } |
305 #else | 305 #else |
306 bool SkPictureShader::asFragmentProcessor(GrContext*, const SkPaint&, const SkMa
trix&, | 306 bool SkPictureShader::asFragmentProcessor(GrContext*, const SkPaint&, const SkMa
trix&, |
307 const SkMatrix*, GrColor*, | 307 const SkMatrix*, GrColor*, |
308 GrFragmentProcessor**) const { | 308 GrFragmentProcessor**) const { |
309 SkDEBUGFAIL("Should not call in GPU-less build"); | 309 SkDEBUGFAIL("Should not call in GPU-less build"); |
310 return false; | 310 return false; |
311 } | 311 } |
312 #endif | 312 #endif |
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