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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 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 "SkBitmapCache.h" | 8 #include "SkBitmapCache.h" |
9 #include "SkBitmapProcState.h" | 9 #include "SkBitmapProcState.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
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94 | 94 |
95 static bool valid_for_filtering(unsigned dimension) { | 95 static bool valid_for_filtering(unsigned dimension) { |
96 // for filtering, width and height must fit in 14bits, since we use steal | 96 // for filtering, width and height must fit in 14bits, since we use steal |
97 // 2 bits from each to store our 4bit subpixel data | 97 // 2 bits from each to store our 4bit subpixel data |
98 return (dimension & ~0x3FFF) == 0; | 98 return (dimension & ~0x3FFF) == 0; |
99 } | 99 } |
100 | 100 |
101 static SkScalar effective_matrix_scale(const SkMatrix& mat) { | 101 static SkScalar effective_matrix_scale(const SkMatrix& mat) { |
102 SkScalar dx = SkVector::Length(mat.getScaleX(), mat.getSkewY()); | 102 SkScalar dx = SkVector::Length(mat.getScaleX(), mat.getSkewY()); |
103 SkScalar dy = SkVector::Length(mat.getSkewX(), mat.getScaleY()); | 103 SkScalar dy = SkVector::Length(mat.getSkewX(), mat.getScaleY()); |
104 #ifdef SK_SUPPORT_LEGACY_MIPMAP_EFFECTIVE_SCALE | |
105 return SkMaxScalar(dx, dy); | |
106 #else | |
107 return SkScalarSqrt(dx * dy); | 104 return SkScalarSqrt(dx * dy); |
108 #endif | |
109 } | 105 } |
110 | 106 |
111 // Check to see that the size of the bitmap that would be produced by | 107 // Check to see that the size of the bitmap that would be produced by |
112 // scaling by the given inverted matrix is less than the maximum allowed. | 108 // scaling by the given inverted matrix is less than the maximum allowed. |
113 static inline bool cache_size_okay(const SkBitmap& bm, const SkMatrix& invMat) { | 109 static inline bool cache_size_okay(const SkBitmap& bm, const SkMatrix& invMat) { |
114 size_t maximumAllocation = SkResourceCache::GetEffectiveSingleAllocationByte
Limit(); | 110 size_t maximumAllocation = SkResourceCache::GetEffectiveSingleAllocationByte
Limit(); |
115 if (0 == maximumAllocation) { | 111 if (0 == maximumAllocation) { |
116 return true; | 112 return true; |
117 } | 113 } |
118 // float matrixScaleFactor = 1.0 / (invMat.scaleX * invMat.scaleY); | 114 // float matrixScaleFactor = 1.0 / (invMat.scaleX * invMat.scaleY); |
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1018 fx += dx; | 1014 fx += dx; |
1019 } | 1015 } |
1020 } else { | 1016 } else { |
1021 for (int i = 0; i < count; ++i) { | 1017 for (int i = 0; i < count; ++i) { |
1022 dst[i] = src[SkClampMax(SkFractionalIntToInt(fx), maxX)]; | 1018 dst[i] = src[SkClampMax(SkFractionalIntToInt(fx), maxX)]; |
1023 fx += dx; | 1019 fx += dx; |
1024 } | 1020 } |
1025 } | 1021 } |
1026 } | 1022 } |
1027 | 1023 |
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