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1 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * This Source Code Form is subject to the terms of the Mozilla Public
3 : * License, v. 2.0. If a copy of the MPL was not distributed with this
4 : * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 :
6 : #include "2D.h"
7 : #include "Logging.h"
8 : #include "PathHelpers.h"
9 :
10 : #include "DrawTargetCapture.h"
11 :
12 : #ifdef BUILD_ARM_NEON
13 : #include "mozilla/arm.h"
14 : #include "LuminanceNEON.h"
15 : #endif
16 :
17 : namespace mozilla {
18 : namespace gfx {
19 :
20 : /**
21 : * Byte offsets of channels in a native packed gfxColor or cairo image surface.
22 : */
23 : #ifdef IS_BIG_ENDIAN
24 : #define GFX_ARGB32_OFFSET_A 0
25 : #define GFX_ARGB32_OFFSET_R 1
26 : #define GFX_ARGB32_OFFSET_G 2
27 : #define GFX_ARGB32_OFFSET_B 3
28 : #else
29 : #define GFX_ARGB32_OFFSET_A 3
30 : #define GFX_ARGB32_OFFSET_R 2
31 : #define GFX_ARGB32_OFFSET_G 1
32 : #define GFX_ARGB32_OFFSET_B 0
33 : #endif
34 :
35 : // c = n / 255
36 : // c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4)) * 255 + 0.5
37 : static const uint8_t gsRGBToLinearRGBMap[256] = {
38 : 0, 0, 0, 0, 0, 0, 0, 1,
39 : 1, 1, 1, 1, 1, 1, 1, 1,
40 : 1, 1, 2, 2, 2, 2, 2, 2,
41 : 2, 2, 3, 3, 3, 3, 3, 3,
42 : 4, 4, 4, 4, 4, 5, 5, 5,
43 : 5, 6, 6, 6, 6, 7, 7, 7,
44 : 8, 8, 8, 8, 9, 9, 9, 10,
45 : 10, 10, 11, 11, 12, 12, 12, 13,
46 : 13, 13, 14, 14, 15, 15, 16, 16,
47 : 17, 17, 17, 18, 18, 19, 19, 20,
48 : 20, 21, 22, 22, 23, 23, 24, 24,
49 : 25, 25, 26, 27, 27, 28, 29, 29,
50 : 30, 30, 31, 32, 32, 33, 34, 35,
51 : 35, 36, 37, 37, 38, 39, 40, 41,
52 : 41, 42, 43, 44, 45, 45, 46, 47,
53 : 48, 49, 50, 51, 51, 52, 53, 54,
54 : 55, 56, 57, 58, 59, 60, 61, 62,
55 : 63, 64, 65, 66, 67, 68, 69, 70,
56 : 71, 72, 73, 74, 76, 77, 78, 79,
57 : 80, 81, 82, 84, 85, 86, 87, 88,
58 : 90, 91, 92, 93, 95, 96, 97, 99,
59 : 100, 101, 103, 104, 105, 107, 108, 109,
60 : 111, 112, 114, 115, 116, 118, 119, 121,
61 : 122, 124, 125, 127, 128, 130, 131, 133,
62 : 134, 136, 138, 139, 141, 142, 144, 146,
63 : 147, 149, 151, 152, 154, 156, 157, 159,
64 : 161, 163, 164, 166, 168, 170, 171, 173,
65 : 175, 177, 179, 181, 183, 184, 186, 188,
66 : 190, 192, 194, 196, 198, 200, 202, 204,
67 : 206, 208, 210, 212, 214, 216, 218, 220,
68 : 222, 224, 226, 229, 231, 233, 235, 237,
69 : 239, 242, 244, 246, 248, 250, 253, 255
70 : };
71 :
72 : static void
73 0 : ComputesRGBLuminanceMask(const uint8_t *aSourceData,
74 : int32_t aSourceStride,
75 : uint8_t *aDestData,
76 : int32_t aDestStride,
77 : const IntSize &aSize,
78 : float aOpacity)
79 : {
80 : #ifdef BUILD_ARM_NEON
81 : if (mozilla::supports_neon()) {
82 : ComputesRGBLuminanceMask_NEON(aSourceData, aSourceStride,
83 : aDestData, aDestStride,
84 : aSize, aOpacity);
85 : return;
86 : }
87 : #endif
88 :
89 0 : int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
90 0 : int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
91 0 : int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
92 0 : int32_t sourceOffset = aSourceStride - 4 * aSize.width;
93 0 : const uint8_t *sourcePixel = aSourceData;
94 0 : int32_t destOffset = aDestStride - aSize.width;
95 0 : uint8_t *destPixel = aDestData;
96 :
97 0 : for (int32_t y = 0; y < aSize.height; y++) {
98 0 : for (int32_t x = 0; x < aSize.width; x++) {
99 0 : uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
100 :
101 0 : if (a) {
102 0 : *destPixel = (redFactor * sourcePixel[GFX_ARGB32_OFFSET_R] +
103 0 : greenFactor * sourcePixel[GFX_ARGB32_OFFSET_G] +
104 0 : blueFactor * sourcePixel[GFX_ARGB32_OFFSET_B]) >> 8;
105 : } else {
106 0 : *destPixel = 0;
107 : }
108 0 : sourcePixel += 4;
109 0 : destPixel++;
110 : }
111 0 : sourcePixel += sourceOffset;
112 0 : destPixel += destOffset;
113 : }
114 0 : }
115 :
116 : static void
117 0 : ComputeLinearRGBLuminanceMask(const uint8_t *aSourceData,
118 : int32_t aSourceStride,
119 : uint8_t *aDestData,
120 : int32_t aDestStride,
121 : const IntSize &aSize,
122 : float aOpacity)
123 : {
124 0 : int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
125 0 : int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
126 0 : int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
127 0 : int32_t sourceOffset = aSourceStride - 4 * aSize.width;
128 0 : const uint8_t *sourcePixel = aSourceData;
129 0 : int32_t destOffset = aDestStride - aSize.width;
130 0 : uint8_t *destPixel = aDestData;
131 :
132 0 : for (int32_t y = 0; y < aSize.height; y++) {
133 0 : for (int32_t x = 0; x < aSize.width; x++) {
134 0 : uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
135 :
136 : // unpremultiply
137 0 : if (a) {
138 0 : if (a == 255) {
139 : /* sRGB -> linearRGB -> intensity */
140 0 : *destPixel =
141 : static_cast<uint8_t>
142 0 : ((gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_R]] *
143 0 : redFactor +
144 0 : gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_G]] *
145 0 : greenFactor +
146 0 : gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_B]] *
147 0 : blueFactor) >> 8);
148 : } else {
149 : uint8_t tempPixel[4];
150 0 : tempPixel[GFX_ARGB32_OFFSET_B] =
151 0 : (255 * sourcePixel[GFX_ARGB32_OFFSET_B]) / a;
152 0 : tempPixel[GFX_ARGB32_OFFSET_G] =
153 0 : (255 * sourcePixel[GFX_ARGB32_OFFSET_G]) / a;
154 0 : tempPixel[GFX_ARGB32_OFFSET_R] =
155 0 : (255 * sourcePixel[GFX_ARGB32_OFFSET_R]) / a;
156 :
157 : /* sRGB -> linearRGB -> intensity */
158 0 : *destPixel =
159 0 : static_cast<uint8_t>
160 0 : (((gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_R]] *
161 0 : redFactor +
162 0 : gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_G]] *
163 0 : greenFactor +
164 0 : gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_B]] *
165 0 : blueFactor) >> 8) * (a / 255.0f));
166 : }
167 : } else {
168 0 : *destPixel = 0;
169 : }
170 0 : sourcePixel += 4;
171 0 : destPixel++;
172 : }
173 0 : sourcePixel += sourceOffset;
174 0 : destPixel += destOffset;
175 : }
176 0 : }
177 :
178 : already_AddRefed<DrawTargetCapture>
179 0 : DrawTarget::CreateCaptureDT(const IntSize& aSize)
180 : {
181 0 : RefPtr<DrawTargetCaptureImpl> dt = new DrawTargetCaptureImpl();
182 :
183 0 : if (!dt->Init(aSize, this)) {
184 0 : gfxWarning() << "Failed to initialize Capture DrawTarget!";
185 0 : return nullptr;
186 : }
187 :
188 0 : return dt.forget();
189 : }
190 :
191 : void
192 0 : DrawTarget::DrawCapturedDT(DrawTargetCapture *aCaptureDT,
193 : const Matrix& aTransform)
194 : {
195 0 : if (aTransform.HasNonIntegerTranslation()) {
196 0 : gfxWarning() << "Non integer translations are not supported for DrawCaptureDT at this time!";
197 0 : return;
198 : }
199 0 : static_cast<DrawTargetCaptureImpl*>(aCaptureDT)->ReplayToDrawTarget(this, aTransform);
200 : }
201 :
202 : void
203 0 : DrawTarget::PushDeviceSpaceClipRects(const IntRect* aRects, uint32_t aCount)
204 : {
205 0 : Matrix oldTransform = GetTransform();
206 0 : SetTransform(Matrix());
207 :
208 0 : RefPtr<PathBuilder> pathBuilder = CreatePathBuilder();
209 0 : for (uint32_t i = 0; i < aCount; i++) {
210 0 : AppendRectToPath(pathBuilder, Rect(aRects[i]));
211 : }
212 0 : RefPtr<Path> path = pathBuilder->Finish();
213 0 : PushClip(path);
214 :
215 0 : SetTransform(oldTransform);
216 0 : }
217 :
218 : void
219 0 : DrawTarget::StrokeGlyphs(ScaledFont* aFont,
220 : const GlyphBuffer& aBuffer,
221 : const Pattern& aPattern,
222 : const StrokeOptions& aStrokeOptions,
223 : const DrawOptions& aOptions,
224 : const GlyphRenderingOptions* aRenderingOptions)
225 : {
226 0 : RefPtr<Path> path = aFont->GetPathForGlyphs(aBuffer, this);
227 0 : Stroke(path, aPattern, aStrokeOptions, aOptions);
228 0 : }
229 :
230 : already_AddRefed<SourceSurface>
231 0 : DrawTarget::IntoLuminanceSource(LuminanceType aMaskType, float aOpacity)
232 : {
233 0 : RefPtr<SourceSurface> surface = Snapshot();
234 0 : IntSize size = surface->GetSize();
235 :
236 0 : RefPtr<DataSourceSurface> maskSurface = surface->GetDataSurface();
237 : DataSourceSurface::MappedSurface map;
238 0 : if (!maskSurface->Map(DataSourceSurface::MapType::READ, &map)) {
239 0 : return nullptr;
240 : }
241 :
242 : // Create alpha channel mask for output
243 : RefPtr<DataSourceSurface> destMaskSurface =
244 0 : Factory::CreateDataSourceSurface(size, SurfaceFormat::A8);
245 0 : if (!destMaskSurface) {
246 0 : return nullptr;
247 : }
248 : DataSourceSurface::MappedSurface destMap;
249 0 : if (!destMaskSurface->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
250 0 : return nullptr;
251 : }
252 :
253 0 : switch (aMaskType) {
254 : case LuminanceType::LUMINANCE:
255 : {
256 0 : ComputesRGBLuminanceMask(map.mData, map.mStride,
257 : destMap.mData, destMap.mStride,
258 0 : size, aOpacity);
259 0 : break;
260 : }
261 : case LuminanceType::LINEARRGB:
262 : {
263 0 : ComputeLinearRGBLuminanceMask(map.mData, map.mStride,
264 : destMap.mData, destMap.mStride,
265 0 : size, aOpacity);
266 0 : break;
267 : }
268 : }
269 :
270 0 : maskSurface->Unmap();
271 0 : destMaskSurface->Unmap();
272 :
273 0 : return destMaskSurface.forget();
274 : }
275 :
276 : } // namespace gfx
277 : } // namespace mozilla
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