gfx/skia/patches/0007-Bug-848491-Re-apply-bug-687188-Expand-the-gradient-c.patch@6474c204b198
gfx/skia/patches/0007-Bug-848491-Re-apply-bug-687188-Expand-the-gradient-c.patch
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 From: George Wright <gw@gwright.org.uk>
2 Date: Thu, 25 Apr 2013 20:47:06 -0400
3 Subject: Bug 848491 - Re-apply bug 687188 - Expand the gradient cache by 2 to store 0/1 colour stop values for clamping.
6 diff --git a/gfx/skia/src/effects/gradients/SkGradientShader.cpp b/gfx/skia/src/effects/gradients/SkGradientShader.cpp
7 index 684355d..27a9c46 100644
8 --- a/gfx/skia/src/effects/gradients/SkGradientShader.cpp
9 +++ b/gfx/skia/src/effects/gradients/SkGradientShader.cpp
10 @@ -453,15 +453,15 @@ const uint16_t* SkGradientShaderBase::getCache16() const {
12 const SkPMColor* SkGradientShaderBase::getCache32() const {
13 if (fCache32 == NULL) {
14 - // double the count for dither entries
15 - const int entryCount = kCache32Count * 4;
16 + // double the count for dither entries, and have an extra two entries for clamp values
17 + const int entryCount = kCache32Count * 4 + 2;
18 const size_t allocSize = sizeof(SkPMColor) * entryCount;
20 if (NULL == fCache32PixelRef) {
21 fCache32PixelRef = SkNEW_ARGS(SkMallocPixelRef,
22 (NULL, allocSize, NULL));
23 }
24 - fCache32 = (SkPMColor*)fCache32PixelRef->getAddr();
25 + fCache32 = (SkPMColor*)fCache32PixelRef->getAddr() + 1;
26 if (fColorCount == 2) {
27 Build32bitCache(fCache32, fOrigColors[0], fOrigColors[1],
28 kCache32Count, fCacheAlpha);
29 @@ -484,7 +484,7 @@ const SkPMColor* SkGradientShaderBase::getCache32() const {
30 SkMallocPixelRef* newPR = SkNEW_ARGS(SkMallocPixelRef,
31 (NULL, allocSize, NULL));
32 SkPMColor* linear = fCache32; // just computed linear data
33 - SkPMColor* mapped = (SkPMColor*)newPR->getAddr(); // storage for mapped data
34 + SkPMColor* mapped = (SkPMColor*)newPR->getAddr() + 1; // storage for mapped data
35 SkUnitMapper* map = fMapper;
36 for (int i = 0; i < kCache32Count; i++) {
37 int index = map->mapUnit16((i << 8) | i) >> 8;
38 @@ -495,9 +495,21 @@ const SkPMColor* SkGradientShaderBase::getCache32() const {
39 }
40 fCache32PixelRef->unref();
41 fCache32PixelRef = newPR;
42 - fCache32 = (SkPMColor*)newPR->getAddr();
43 + fCache32 = (SkPMColor*)newPR->getAddr() + 1;
44 }
45 }
46 +
47 + // Write the clamp colours into the first and last entries of fCache32
48 + fCache32[kCache32ClampLower] = SkPackARGB32(fCacheAlpha,
49 + SkColorGetR(fOrigColors[0]),
50 + SkColorGetG(fOrigColors[0]),
51 + SkColorGetB(fOrigColors[0]));
52 +
53 + fCache32[kCache32ClampUpper] = SkPackARGB32(fCacheAlpha,
54 + SkColorGetR(fOrigColors[fColorCount - 1]),
55 + SkColorGetG(fOrigColors[fColorCount - 1]),
56 + SkColorGetB(fOrigColors[fColorCount - 1]));
57 +
58 return fCache32;
59 }
61 diff --git a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h
62 index 729ce4e..2cb6a9d 100644
63 --- a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h
64 +++ b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h
65 @@ -86,6 +86,9 @@ public:
66 /// if dithering is disabled.
67 kDitherStride32 = kCache32Count,
68 kDitherStride16 = kCache16Count,
69 +
70 + kCache32ClampLower = -1,
71 + kCache32ClampUpper = kCache32Count * 4
72 };
75 diff --git a/gfx/skia/src/effects/gradients/SkLinearGradient.cpp b/gfx/skia/src/effects/gradients/SkLinearGradient.cpp
76 index e0f216c..40ab918 100644
77 --- a/gfx/skia/src/effects/gradients/SkLinearGradient.cpp
78 +++ b/gfx/skia/src/effects/gradients/SkLinearGradient.cpp
79 @@ -127,6 +127,17 @@ void shadeSpan_linear_vertical_lerp(TileProc proc, SkFixed dx, SkFixed fx,
80 SkPMColor* SK_RESTRICT dstC,
81 const SkPMColor* SK_RESTRICT cache,
82 int toggle, int count) {
83 + if (proc == clamp_tileproc) {
84 + // No need to lerp or dither for clamp values
85 + if (fx < 0) {
86 + sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count);
87 + return;
88 + } else if (fx > 0xffff) {
89 + sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count);
90 + return;
91 + }
92 + }
93 +
94 // We're a vertical gradient, so no change in a span.
95 // If colors change sharply across the gradient, dithering is
96 // insufficient (it subsamples the color space) and we need to lerp.
97 @@ -154,10 +165,7 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx,
98 range.init(fx, dx, count, 0, SkGradientShaderBase::kCache32Count - 1);
100 if ((count = range.fCount0) > 0) {
101 - sk_memset32_dither(dstC,
102 - cache[toggle + range.fV0],
103 - cache[next_dither_toggle(toggle) + range.fV0],
104 - count);
105 + sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count);
106 dstC += count;
107 }
108 if ((count = range.fCount1) > 0) {
109 @@ -176,10 +184,7 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx,
110 }
111 }
112 if ((count = range.fCount2) > 0) {
113 - sk_memset32_dither(dstC,
114 - cache[toggle + range.fV1],
115 - cache[next_dither_toggle(toggle) + range.fV1],
116 - count);
117 + sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count);
118 }
119 }
121 diff --git a/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp b/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp
122 index abd974b..601fff4 100644
123 --- a/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp
124 +++ b/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp
125 @@ -124,10 +124,14 @@ static void twopoint_clamp(TwoPtRadial* rec, SkPMColor* SK_RESTRICT dstC,
126 if (TwoPtRadial::DontDrawT(t)) {
127 *dstC++ = 0;
128 } else {
129 - SkFixed index = SkClampMax(t, 0xFFFF);
130 - SkASSERT(index <= 0xFFFF);
131 - *dstC++ = cache[toggle +
132 - (index >> SkGradientShaderBase::kCache32Shift)];
133 + if (t < 0) {
134 + *dstC++ = cache[SkGradientShaderBase::kCache32ClampLower];
135 + } else if (t > 0xFFFF) {
136 + *dstC++ = cache[SkGradientShaderBase::kCache32ClampUpper];
137 + } else {
138 + SkASSERT(t <= 0xFFFF);
139 + *dstC++ = cache[t >> SkGradientShaderBase::kCache32Shift];
140 + }
141 }
142 toggle = next_dither_toggle(toggle);
143 }
144 diff --git a/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp b/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp
145 index f70b67d..ec2ae75 100644
146 --- a/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp
147 +++ b/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp
148 @@ -120,9 +120,14 @@ void shadeSpan_twopoint_clamp(SkScalar fx, SkScalar dx,
149 for (; count > 0; --count) {
150 SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura,
151 fOneOverTwoA, posRoot);
152 - SkFixed index = SkClampMax(t, 0xFFFF);
153 - SkASSERT(index <= 0xFFFF);
154 - *dstC++ = cache[index >> SkGradientShaderBase::kCache32Shift];
155 + if (t < 0) {
156 + *dstC++ = cache[SkGradientShaderBase::kCache32ClampLower];
157 + } else if (t > 0xFFFF) {
158 + *dstC++ = cache[SkGradientShaderBase::kCache32ClampUpper];
159 + } else {
160 + SkASSERT(t <= 0xFFFF);
161 + *dstC++ = cache[t >> SkGradientShaderBase::kCache32Shift];
162 + }
163 fx += dx;
164 fy += dy;
165 b += db;
166 --
167 1.7.11.7
