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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
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 "Sk4fLinearGradient.h" | 8 #include "Sk4fLinearGradient.h" |
9 #include "SkGradientShaderPriv.h" | 9 #include "SkGradientShaderPriv.h" |
10 #include "SkLinearGradient.h" | 10 #include "SkLinearGradient.h" |
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618 if (!fCache || fCache->getAlpha() != alpha || fCache->getDither() != dither)
{ | 618 if (!fCache || fCache->getAlpha() != alpha || fCache->getDither() != dither)
{ |
619 fCache.reset(new GradientShaderCache(alpha, dither, *this)); | 619 fCache.reset(new GradientShaderCache(alpha, dither, *this)); |
620 } | 620 } |
621 // Increment the ref counter inside the mutex to ensure the returned pointer
is still valid. | 621 // Increment the ref counter inside the mutex to ensure the returned pointer
is still valid. |
622 // Otherwise, the pointer may have been overwritten on a different thread be
fore the object's | 622 // Otherwise, the pointer may have been overwritten on a different thread be
fore the object's |
623 // ref count was incremented. | 623 // ref count was incremented. |
624 fCache.get()->ref(); | 624 fCache.get()->ref(); |
625 return fCache; | 625 return fCache; |
626 } | 626 } |
627 | 627 |
628 SK_DECLARE_STATIC_MUTEX(gGradientCacheMutex); | 628 static SkMutex gGradientCacheMutex; |
629 /* | 629 /* |
630 * Because our caller might rebuild the same (logically the same) gradient | 630 * Because our caller might rebuild the same (logically the same) gradient |
631 * over and over, we'd like to return exactly the same "bitmap" if possible, | 631 * over and over, we'd like to return exactly the same "bitmap" if possible, |
632 * allowing the client to utilize a cache of our bitmap (e.g. with a GPU). | 632 * allowing the client to utilize a cache of our bitmap (e.g. with a GPU). |
633 * To do that, we maintain a private cache of built-bitmaps, based on our | 633 * To do that, we maintain a private cache of built-bitmaps, based on our |
634 * colors and positions. Note: we don't try to flatten the fMapper, so if one | 634 * colors and positions. Note: we don't try to flatten the fMapper, so if one |
635 * is present, we skip the cache for now. | 635 * is present, we skip the cache for now. |
636 */ | 636 */ |
637 void SkGradientShaderBase::getGradientTableBitmap(SkBitmap* bitmap) const { | 637 void SkGradientShaderBase::getGradientTableBitmap(SkBitmap* bitmap) const { |
638 // our caller assumes no external alpha, so we ensure that our cache is | 638 // our caller assumes no external alpha, so we ensure that our cache is |
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1203 (*stops)[i] = stop; | 1203 (*stops)[i] = stop; |
1204 stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - st
op) : 1.f; | 1204 stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - st
op) : 1.f; |
1205 } | 1205 } |
1206 } | 1206 } |
1207 *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileM
odeCount)); | 1207 *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileM
odeCount)); |
1208 | 1208 |
1209 return outColors; | 1209 return outColors; |
1210 } | 1210 } |
1211 | 1211 |
1212 #endif | 1212 #endif |
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