зеркало из https://github.com/mozilla/gecko-dev.git
273 строки
8.6 KiB
C++
273 строки
8.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "2D.h"
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#include "Logging.h"
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#include "PathHelpers.h"
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#include "DrawTargetCapture.h"
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#ifdef BUILD_ARM_NEON
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#include "mozilla/arm.h"
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#include "LuminanceNEON.h"
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#endif
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namespace mozilla {
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namespace gfx {
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/**
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* Byte offsets of channels in a native packed gfxColor or cairo image surface.
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*/
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#ifdef IS_BIG_ENDIAN
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#define GFX_ARGB32_OFFSET_A 0
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#define GFX_ARGB32_OFFSET_R 1
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#define GFX_ARGB32_OFFSET_G 2
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#define GFX_ARGB32_OFFSET_B 3
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#else
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#define GFX_ARGB32_OFFSET_A 3
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#define GFX_ARGB32_OFFSET_R 2
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#define GFX_ARGB32_OFFSET_G 1
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#define GFX_ARGB32_OFFSET_B 0
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#endif
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// c = n / 255
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// c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4)) * 255 + 0.5
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static const uint8_t gsRGBToLinearRGBMap[256] = {
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0, 0, 0, 0, 0, 0, 0, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 2, 2, 2, 2, 2, 2,
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2, 2, 3, 3, 3, 3, 3, 3,
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4, 4, 4, 4, 4, 5, 5, 5,
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5, 6, 6, 6, 6, 7, 7, 7,
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8, 8, 8, 8, 9, 9, 9, 10,
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10, 10, 11, 11, 12, 12, 12, 13,
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13, 13, 14, 14, 15, 15, 16, 16,
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17, 17, 17, 18, 18, 19, 19, 20,
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20, 21, 22, 22, 23, 23, 24, 24,
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25, 25, 26, 27, 27, 28, 29, 29,
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30, 30, 31, 32, 32, 33, 34, 35,
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35, 36, 37, 37, 38, 39, 40, 41,
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41, 42, 43, 44, 45, 45, 46, 47,
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48, 49, 50, 51, 51, 52, 53, 54,
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55, 56, 57, 58, 59, 60, 61, 62,
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63, 64, 65, 66, 67, 68, 69, 70,
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71, 72, 73, 74, 76, 77, 78, 79,
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80, 81, 82, 84, 85, 86, 87, 88,
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90, 91, 92, 93, 95, 96, 97, 99,
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100, 101, 103, 104, 105, 107, 108, 109,
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111, 112, 114, 115, 116, 118, 119, 121,
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122, 124, 125, 127, 128, 130, 131, 133,
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134, 136, 138, 139, 141, 142, 144, 146,
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147, 149, 151, 152, 154, 156, 157, 159,
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161, 163, 164, 166, 168, 170, 171, 173,
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175, 177, 179, 181, 183, 184, 186, 188,
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190, 192, 194, 196, 198, 200, 202, 204,
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206, 208, 210, 212, 214, 216, 218, 220,
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222, 224, 226, 229, 231, 233, 235, 237,
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239, 242, 244, 246, 248, 250, 253, 255
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};
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static void
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ComputesRGBLuminanceMask(const uint8_t *aSourceData,
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int32_t aSourceStride,
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uint8_t *aDestData,
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int32_t aDestStride,
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const IntSize &aSize,
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float aOpacity)
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{
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#ifdef BUILD_ARM_NEON
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if (mozilla::supports_neon()) {
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ComputesRGBLuminanceMask_NEON(aSourceData, aSourceStride,
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aDestData, aDestStride,
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aSize, aOpacity);
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return;
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}
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#endif
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int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
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int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
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int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
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int32_t sourceOffset = aSourceStride - 4 * aSize.width;
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const uint8_t *sourcePixel = aSourceData;
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int32_t destOffset = aDestStride - aSize.width;
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uint8_t *destPixel = aDestData;
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for (int32_t y = 0; y < aSize.height; y++) {
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for (int32_t x = 0; x < aSize.width; x++) {
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uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
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if (a) {
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*destPixel = (redFactor * sourcePixel[GFX_ARGB32_OFFSET_R] +
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greenFactor * sourcePixel[GFX_ARGB32_OFFSET_G] +
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blueFactor * sourcePixel[GFX_ARGB32_OFFSET_B]) >> 8;
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} else {
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*destPixel = 0;
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}
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sourcePixel += 4;
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destPixel++;
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}
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sourcePixel += sourceOffset;
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destPixel += destOffset;
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}
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}
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static void
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ComputeLinearRGBLuminanceMask(const uint8_t *aSourceData,
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int32_t aSourceStride,
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uint8_t *aDestData,
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int32_t aDestStride,
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const IntSize &aSize,
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float aOpacity)
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{
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int32_t redFactor = 55 * aOpacity; // 255 * 0.2125 * opacity
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int32_t greenFactor = 183 * aOpacity; // 255 * 0.7154 * opacity
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int32_t blueFactor = 18 * aOpacity; // 255 * 0.0721
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int32_t sourceOffset = aSourceStride - 4 * aSize.width;
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const uint8_t *sourcePixel = aSourceData;
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int32_t destOffset = aDestStride - aSize.width;
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uint8_t *destPixel = aDestData;
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for (int32_t y = 0; y < aSize.height; y++) {
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for (int32_t x = 0; x < aSize.width; x++) {
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uint8_t a = sourcePixel[GFX_ARGB32_OFFSET_A];
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// unpremultiply
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if (a) {
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if (a == 255) {
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/* sRGB -> linearRGB -> intensity */
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*destPixel =
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static_cast<uint8_t>
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((gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_R]] *
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redFactor +
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gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_G]] *
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greenFactor +
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gsRGBToLinearRGBMap[sourcePixel[GFX_ARGB32_OFFSET_B]] *
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blueFactor) >> 8);
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} else {
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uint8_t tempPixel[4];
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tempPixel[GFX_ARGB32_OFFSET_B] =
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(255 * sourcePixel[GFX_ARGB32_OFFSET_B]) / a;
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tempPixel[GFX_ARGB32_OFFSET_G] =
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(255 * sourcePixel[GFX_ARGB32_OFFSET_G]) / a;
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tempPixel[GFX_ARGB32_OFFSET_R] =
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(255 * sourcePixel[GFX_ARGB32_OFFSET_R]) / a;
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/* sRGB -> linearRGB -> intensity */
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*destPixel =
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static_cast<uint8_t>
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(((gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_R]] *
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redFactor +
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gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_G]] *
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greenFactor +
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gsRGBToLinearRGBMap[tempPixel[GFX_ARGB32_OFFSET_B]] *
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blueFactor) >> 8) * (a / 255.0f));
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}
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} else {
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*destPixel = 0;
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}
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sourcePixel += 4;
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destPixel++;
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}
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sourcePixel += sourceOffset;
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destPixel += destOffset;
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}
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}
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void
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DrawTarget::DrawCapturedDT(DrawTargetCapture *aCaptureDT,
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const Matrix& aTransform)
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{
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if (aTransform.HasNonIntegerTranslation()) {
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gfxWarning() << "Non integer translations are not supported for DrawCaptureDT at this time!";
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return;
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}
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static_cast<DrawTargetCaptureImpl*>(aCaptureDT)->ReplayToDrawTarget(this, aTransform);
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}
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void
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DrawTarget::PushDeviceSpaceClipRects(const IntRect* aRects, uint32_t aCount)
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{
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Matrix oldTransform = GetTransform();
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SetTransform(Matrix());
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RefPtr<PathBuilder> pathBuilder = CreatePathBuilder();
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for (uint32_t i = 0; i < aCount; i++) {
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AppendRectToPath(pathBuilder, Rect(aRects[i]));
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}
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RefPtr<Path> path = pathBuilder->Finish();
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PushClip(path);
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SetTransform(oldTransform);
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}
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void
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DrawTarget::StrokeGlyphs(ScaledFont* aFont,
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const GlyphBuffer& aBuffer,
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const Pattern& aPattern,
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const StrokeOptions& aStrokeOptions,
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const DrawOptions& aOptions)
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{
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RefPtr<Path> path = aFont->GetPathForGlyphs(aBuffer, this);
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Stroke(path, aPattern, aStrokeOptions, aOptions);
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}
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already_AddRefed<SourceSurface>
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DrawTarget::IntoLuminanceSource(LuminanceType aMaskType, float aOpacity)
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{
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RefPtr<SourceSurface> surface = Snapshot();
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if (!surface) {
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return nullptr;
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}
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IntSize size = surface->GetSize();
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RefPtr<DataSourceSurface> maskSurface = surface->GetDataSurface();
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if (!maskSurface) {
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return nullptr;
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}
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DataSourceSurface::MappedSurface map;
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if (!maskSurface->Map(DataSourceSurface::MapType::READ, &map)) {
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return nullptr;
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}
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// Create alpha channel mask for output
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RefPtr<DataSourceSurface> destMaskSurface =
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Factory::CreateDataSourceSurface(size, SurfaceFormat::A8);
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if (!destMaskSurface) {
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return nullptr;
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}
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DataSourceSurface::MappedSurface destMap;
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if (!destMaskSurface->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
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return nullptr;
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}
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switch (aMaskType) {
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case LuminanceType::LUMINANCE:
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{
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ComputesRGBLuminanceMask(map.mData, map.mStride,
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destMap.mData, destMap.mStride,
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size, aOpacity);
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break;
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}
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case LuminanceType::LINEARRGB:
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{
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ComputeLinearRGBLuminanceMask(map.mData, map.mStride,
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destMap.mData, destMap.mStride,
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size, aOpacity);
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break;
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}
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}
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maskSurface->Unmap();
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destMaskSurface->Unmap();
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return destMaskSurface.forget();
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}
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} // namespace gfx
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} // namespace mozilla
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