DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d1ed7de67f5a)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_GFX_HELPERSSKIA_H_
#define MOZILLA_GFX_HELPERSSKIA_H_

#include "2D.h"
#include "skia/SkCanvas.h"
#include "skia/SkDashPathEffect.h"
#include "skia/SkShader.h"
#ifdef USE_SKIA_GPU
#include "skia/GrTypes.h"
#endif
#include "mozilla/Assertions.h"
#include <vector>

namespace mozilla {
namespace gfx {

static inline SkColorType
GfxFormatToSkiaColorType(SurfaceFormat format)
{
  switch (format)
  {
    case SurfaceFormat::B8G8R8A8:
      return kBGRA_8888_SkColorType;
    case SurfaceFormat::B8G8R8X8:
      // We probably need to do something here.
      return kBGRA_8888_SkColorType;
    case SurfaceFormat::R5G6B5:
      return kRGB_565_SkColorType;
    case SurfaceFormat::A8:
      return kAlpha_8_SkColorType;
    default:
      return kRGBA_8888_SkColorType;
  }
}

static inline SurfaceFormat
SkiaColorTypeToGfxFormat(SkColorType type)
{
  switch (type)
  {
    case kBGRA_8888_SkColorType:
      return SurfaceFormat::B8G8R8A8;
    case kRGB_565_SkColorType:
      return SurfaceFormat::R5G6B5;
    case kAlpha_8_SkColorType:
      return SurfaceFormat::A8;
    default:
      return SurfaceFormat::B8G8R8A8;
  }
}

#ifdef USE_SKIA_GPU
static inline GrPixelConfig
GfxFormatToGrConfig(SurfaceFormat format)
{
  switch (format)
  {
    case SurfaceFormat::B8G8R8A8:
      return kBGRA_8888_GrPixelConfig;
    case SurfaceFormat::B8G8R8X8:
      // We probably need to do something here.
      return kBGRA_8888_GrPixelConfig;
    case SurfaceFormat::R5G6B5:
      return kRGB_565_GrPixelConfig;
    case SurfaceFormat::A8:
      return kAlpha_8_GrPixelConfig;
    default:
      return kRGBA_8888_GrPixelConfig;
  }

}
#endif
static inline void
GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval)
{
    retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21), SkFloatToScalar(mat._31),
                  SkFloatToScalar(mat._12), SkFloatToScalar(mat._22), SkFloatToScalar(mat._32),
                  0, 0, SK_Scalar1);
}

static inline SkPaint::Cap
CapStyleToSkiaCap(CapStyle aCap)
{
  switch (aCap)
  {
    case CapStyle::BUTT:
      return SkPaint::kButt_Cap;
    case CapStyle::ROUND:
      return SkPaint::kRound_Cap;
    case CapStyle::SQUARE:
      return SkPaint::kSquare_Cap;
  }
  return SkPaint::kDefault_Cap;
}

static inline SkPaint::Join
JoinStyleToSkiaJoin(JoinStyle aJoin)
{
  switch (aJoin)
  {
    case JoinStyle::BEVEL:
      return SkPaint::kBevel_Join;
    case JoinStyle::ROUND:
      return SkPaint::kRound_Join;
    case JoinStyle::MITER:
    case JoinStyle::MITER_OR_BEVEL:
      return SkPaint::kMiter_Join;
  }
  return SkPaint::kDefault_Join;
}

static inline bool
StrokeOptionsToPaint(SkPaint& aPaint, const StrokeOptions &aOptions)
{
  // Skia renders 0 width strokes with a width of 1 (and in black),
  // so we should just skip the draw call entirely.
  if (!aOptions.mLineWidth) {
    return false;
  }
  aPaint.setStrokeWidth(SkFloatToScalar(aOptions.mLineWidth));
  aPaint.setStrokeMiter(SkFloatToScalar(aOptions.mMiterLimit));
  aPaint.setStrokeCap(CapStyleToSkiaCap(aOptions.mLineCap));
  aPaint.setStrokeJoin(JoinStyleToSkiaJoin(aOptions.mLineJoin));

  if (aOptions.mDashLength > 0) {
    // Skia only supports dash arrays that are multiples of 2.
    uint32_t dashCount;

    if (aOptions.mDashLength % 2 == 0) {
      dashCount = aOptions.mDashLength;
    } else {
      dashCount = aOptions.mDashLength * 2;
    }

    std::vector<SkScalar> pattern;
    pattern.resize(dashCount);

    for (uint32_t i = 0; i < dashCount; i++) {
      pattern[i] = SkFloatToScalar(aOptions.mDashPattern[i % aOptions.mDashLength]);
    }

    SkDashPathEffect* dash = SkDashPathEffect::Create(&pattern.front(),
                                                      dashCount, 
                                                      SkFloatToScalar(aOptions.mDashOffset));
    SkSafeUnref(aPaint.setPathEffect(dash));
  }

  aPaint.setStyle(SkPaint::kStroke_Style);
  return true;
}

static inline SkXfermode::Mode
GfxOpToSkiaOp(CompositionOp op)
{
  switch (op)
  {
    case CompositionOp::OP_OVER:
      return SkXfermode::kSrcOver_Mode;
    case CompositionOp::OP_ADD:
      return SkXfermode::kPlus_Mode;
    case CompositionOp::OP_ATOP:
      return SkXfermode::kSrcATop_Mode;
    case CompositionOp::OP_OUT:
      return SkXfermode::kSrcOut_Mode;
    case CompositionOp::OP_IN:
      return SkXfermode::kSrcIn_Mode;
    case CompositionOp::OP_SOURCE:
      return SkXfermode::kSrc_Mode;
    case CompositionOp::OP_DEST_IN:
      return SkXfermode::kDstIn_Mode;
    case CompositionOp::OP_DEST_OUT:
      return SkXfermode::kDstOut_Mode;
    case CompositionOp::OP_DEST_OVER:
      return SkXfermode::kDstOver_Mode;
    case CompositionOp::OP_DEST_ATOP:
      return SkXfermode::kDstATop_Mode;
    case CompositionOp::OP_XOR:
      return SkXfermode::kXor_Mode;
    case CompositionOp::OP_MULTIPLY:
      return SkXfermode::kMultiply_Mode;
    case CompositionOp::OP_SCREEN:
      return SkXfermode::kScreen_Mode;
    case CompositionOp::OP_OVERLAY:
      return SkXfermode::kOverlay_Mode;
    case CompositionOp::OP_DARKEN:
      return SkXfermode::kDarken_Mode;
    case CompositionOp::OP_LIGHTEN:
      return SkXfermode::kLighten_Mode;
    case CompositionOp::OP_COLOR_DODGE:
      return SkXfermode::kColorDodge_Mode;
    case CompositionOp::OP_COLOR_BURN:
      return SkXfermode::kColorBurn_Mode;
    case CompositionOp::OP_HARD_LIGHT:
      return SkXfermode::kHardLight_Mode;
    case CompositionOp::OP_SOFT_LIGHT:
      return SkXfermode::kSoftLight_Mode;
    case CompositionOp::OP_DIFFERENCE:
      return SkXfermode::kDifference_Mode;
    case CompositionOp::OP_EXCLUSION:
      return SkXfermode::kExclusion_Mode;
    case CompositionOp::OP_HUE:
      return SkXfermode::kHue_Mode;
    case CompositionOp::OP_SATURATION:
      return SkXfermode::kSaturation_Mode;
    case CompositionOp::OP_COLOR:
      return SkXfermode::kColor_Mode;
    case CompositionOp::OP_LUMINOSITY:
      return SkXfermode::kLuminosity_Mode;
    default:
      return SkXfermode::kSrcOver_Mode;
  }
}

/* There's quite a bit of inconsistency about
 * whether float colors should be rounded with .5f.
 * We choose to do it to match cairo which also
 * happens to match the Direct3D specs */
static inline U8CPU ColorFloatToByte(Float color)
{
  //XXX: do a better job converting to int
  return U8CPU(color*255.f + .5f);
};

static inline SkColor ColorToSkColor(const Color &color, Float aAlpha)
{
  return SkColorSetARGB(ColorFloatToByte(color.a*aAlpha), ColorFloatToByte(color.r),
                        ColorFloatToByte(color.g), ColorFloatToByte(color.b));
}

static inline SkRect
RectToSkRect(const Rect& aRect)
{
  return SkRect::MakeXYWH(SkFloatToScalar(aRect.x), SkFloatToScalar(aRect.y), 
                          SkFloatToScalar(aRect.width), SkFloatToScalar(aRect.height));
}

static inline SkRect
IntRectToSkRect(const IntRect& aRect)
{
  return SkRect::MakeXYWH(SkIntToScalar(aRect.x), SkIntToScalar(aRect.y), 
                          SkIntToScalar(aRect.width), SkIntToScalar(aRect.height));
}

static inline SkIRect
RectToSkIRect(const Rect& aRect)
{
  return SkIRect::MakeXYWH(int32_t(aRect.x), int32_t(aRect.y),
                           int32_t(aRect.width), int32_t(aRect.height));
}

static inline SkIRect
IntRectToSkIRect(const IntRect& aRect)
{
  return SkIRect::MakeXYWH(aRect.x, aRect.y, aRect.width, aRect.height);
}

static inline Point
SkPointToPoint(const SkPoint &aPoint)
{
  return Point(SkScalarToFloat(aPoint.x()), SkScalarToFloat(aPoint.y()));
}

static inline Rect
SkRectToRect(const SkRect &aRect)
{
  return Rect(SkScalarToFloat(aRect.x()), SkScalarToFloat(aRect.y()),
              SkScalarToFloat(aRect.width()), SkScalarToFloat(aRect.height()));
}

static inline SkShader::TileMode
ExtendModeToTileMode(ExtendMode aMode)
{
  switch (aMode)
  {
    case ExtendMode::CLAMP:
      return SkShader::kClamp_TileMode;
    case ExtendMode::REPEAT:
      return SkShader::kRepeat_TileMode;
    case ExtendMode::REFLECT:
      return SkShader::kMirror_TileMode;
  }
  return SkShader::kClamp_TileMode;
}

// The following class was imported from Skia, which is under the 
// following licence:
//
// Copyright (c) 2011 Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

template <typename T> class RefPtrSkia {
public:
  RefPtrSkia() : fObj(NULL) {}
  explicit RefPtrSkia(T* obj) : fObj(obj) { SkSafeRef(fObj); }
  RefPtrSkia(const RefPtrSkia& o) : fObj(o.fObj) { SkSafeRef(fObj); }
  ~RefPtrSkia() { SkSafeUnref(fObj); }

  RefPtrSkia& operator=(const RefPtrSkia& rp) {
    SkRefCnt_SafeAssign(fObj, rp.fObj);
    return *this;
  }
  RefPtrSkia& operator=(T* obj) {
    SkRefCnt_SafeAssign(fObj, obj);
    return *this;
  }

  T* get() const { return fObj; }
  T& operator*() const { return *fObj; }
  T* operator->() const { return fObj; }

  RefPtrSkia& adopt(T* obj) {
    SkSafeUnref(fObj);
    fObj = obj;
    return *this;
  }

  typedef T* RefPtrSkia::*unspecified_bool_type;
  operator unspecified_bool_type() const {
    return fObj ? &RefPtrSkia::fObj : NULL;
  }

private:
  T* fObj;
};

// End of code imported from Skia.

}
}

#endif /* MOZILLA_GFX_HELPERSSKIA_H_ */