The Tor Browser: gfx/2d/HelpersSkia.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     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/. */

     6 #ifndef MOZILLA_GFX_HELPERSSKIA_H_

     7 #define MOZILLA_GFX_HELPERSSKIA_H_

     9 #include "2D.h"

    10 #include "skia/SkCanvas.h"

    11 #include "skia/SkDashPathEffect.h"

    12 #include "skia/SkShader.h"

    13 #ifdef USE_SKIA_GPU

    14 #include "skia/GrTypes.h"

    15 #endif

    16 #include "mozilla/Assertions.h"

    17 #include <vector>

    19 namespace mozilla {

    20 namespace gfx {

    22 static inline SkBitmap::Config

    23 GfxFormatToSkiaConfig(SurfaceFormat format)

    24 {

    25   switch (format)

    26   {

    27     case SurfaceFormat::B8G8R8A8:

    28       return SkBitmap::kARGB_8888_Config;

    29     case SurfaceFormat::B8G8R8X8:

    30       // We probably need to do something here.

    31       return SkBitmap::kARGB_8888_Config;

    32     case SurfaceFormat::R5G6B5:

    33       return SkBitmap::kRGB_565_Config;

    34     case SurfaceFormat::A8:

    35       return SkBitmap::kA8_Config;

    36     default:

    37       return SkBitmap::kARGB_8888_Config;

    38   }

    39 }

    41 static inline SkColorType

    42 GfxFormatToSkiaColorType(SurfaceFormat format)

    43 {

    44   switch (format)

    45   {

    46     case SurfaceFormat::B8G8R8A8:

    47       return kBGRA_8888_SkColorType;

    48     case SurfaceFormat::B8G8R8X8:

    49       // We probably need to do something here.

    50       return kBGRA_8888_SkColorType;

    51     case SurfaceFormat::R5G6B5:

    52       return kRGB_565_SkColorType;

    53     case SurfaceFormat::A8:

    54       return kAlpha_8_SkColorType;

    55     default:

    56       return kRGBA_8888_SkColorType;

    57   }

    58 }

    60 static inline SurfaceFormat

    61 SkiaConfigToGfxFormat(SkBitmap::Config config)

    62 {

    63   switch (config)

    64   {

    65     case SkBitmap::kARGB_8888_Config:

    66       return SurfaceFormat::B8G8R8A8;

    67     case SkBitmap::kRGB_565_Config:

    68       return SurfaceFormat::R5G6B5;

    69     case SkBitmap::kA8_Config:

    70       return SurfaceFormat::A8;

    71     default:

    72       return SurfaceFormat::B8G8R8A8;

    73   }

    74 }

    76 #ifdef USE_SKIA_GPU

    77 static inline GrPixelConfig

    78 GfxFormatToGrConfig(SurfaceFormat format)

    79 {

    80   switch (format)

    81   {

    82     case SurfaceFormat::B8G8R8A8:

    83       return kBGRA_8888_GrPixelConfig;

    84     case SurfaceFormat::B8G8R8X8:

    85       // We probably need to do something here.

    86       return kBGRA_8888_GrPixelConfig;

    87     case SurfaceFormat::R5G6B5:

    88       return kRGB_565_GrPixelConfig;

    89     case SurfaceFormat::A8:

    90       return kAlpha_8_GrPixelConfig;

    91     default:

    92       return kRGBA_8888_GrPixelConfig;

    93   }

    95 }

    96 #endif

    97 static inline void

    98 GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval)

    99 {

   100     retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21), SkFloatToScalar(mat._31),

   101                   SkFloatToScalar(mat._12), SkFloatToScalar(mat._22), SkFloatToScalar(mat._32),

   102                   0, 0, SK_Scalar1);

   103 }

   105 static inline SkPaint::Cap

   106 CapStyleToSkiaCap(CapStyle aCap)

   107 {

   108   switch (aCap)

   109   {

   110     case CapStyle::BUTT:

   111       return SkPaint::kButt_Cap;

   112     case CapStyle::ROUND:

   113       return SkPaint::kRound_Cap;

   114     case CapStyle::SQUARE:

   115       return SkPaint::kSquare_Cap;

   116   }

   117   return SkPaint::kDefault_Cap;

   118 }

   120 static inline SkPaint::Join

   121 JoinStyleToSkiaJoin(JoinStyle aJoin)

   122 {

   123   switch (aJoin)

   124   {

   125     case JoinStyle::BEVEL:

   126       return SkPaint::kBevel_Join;

   127     case JoinStyle::ROUND:

   128       return SkPaint::kRound_Join;

   129     case JoinStyle::MITER:

   130     case JoinStyle::MITER_OR_BEVEL:

   131       return SkPaint::kMiter_Join;

   132   }

   133   return SkPaint::kDefault_Join;

   134 }

   136 static inline bool

   137 StrokeOptionsToPaint(SkPaint& aPaint, const StrokeOptions &aOptions)

   138 {

   139   // Skia renders 0 width strokes with a width of 1 (and in black),

   140   // so we should just skip the draw call entirely.

   141   if (!aOptions.mLineWidth) {

   142     return false;

   143   }

   144   aPaint.setStrokeWidth(SkFloatToScalar(aOptions.mLineWidth));

   145   aPaint.setStrokeMiter(SkFloatToScalar(aOptions.mMiterLimit));

   146   aPaint.setStrokeCap(CapStyleToSkiaCap(aOptions.mLineCap));

   147   aPaint.setStrokeJoin(JoinStyleToSkiaJoin(aOptions.mLineJoin));

   149   if (aOptions.mDashLength > 0) {

   150     // Skia only supports dash arrays that are multiples of 2.

   151     uint32_t dashCount;

   153     if (aOptions.mDashLength % 2 == 0) {

   154       dashCount = aOptions.mDashLength;

   155     } else {

   156       dashCount = aOptions.mDashLength * 2;

   157     }

   159     std::vector<SkScalar> pattern;

   160     pattern.resize(dashCount);

   162     for (uint32_t i = 0; i < dashCount; i++) {

   163       pattern[i] = SkFloatToScalar(aOptions.mDashPattern[i % aOptions.mDashLength]);

   164     }

   166     SkDashPathEffect* dash = SkDashPathEffect::Create(&pattern.front(),

   167                                                       dashCount,

   168                                                       SkFloatToScalar(aOptions.mDashOffset));

   169     SkSafeUnref(aPaint.setPathEffect(dash));

   170   }

   172   aPaint.setStyle(SkPaint::kStroke_Style);

   173   return true;

   174 }

   176 static inline SkXfermode::Mode

   177 GfxOpToSkiaOp(CompositionOp op)

   178 {

   179   switch (op)

   180   {

   181     case CompositionOp::OP_OVER:

   182       return SkXfermode::kSrcOver_Mode;

   183     case CompositionOp::OP_ADD:

   184       return SkXfermode::kPlus_Mode;

   185     case CompositionOp::OP_ATOP:

   186       return SkXfermode::kSrcATop_Mode;

   187     case CompositionOp::OP_OUT:

   188       return SkXfermode::kSrcOut_Mode;

   189     case CompositionOp::OP_IN:

   190       return SkXfermode::kSrcIn_Mode;

   191     case CompositionOp::OP_SOURCE:

   192       return SkXfermode::kSrc_Mode;

   193     case CompositionOp::OP_DEST_IN:

   194       return SkXfermode::kDstIn_Mode;

   195     case CompositionOp::OP_DEST_OUT:

   196       return SkXfermode::kDstOut_Mode;

   197     case CompositionOp::OP_DEST_OVER:

   198       return SkXfermode::kDstOver_Mode;

   199     case CompositionOp::OP_DEST_ATOP:

   200       return SkXfermode::kDstATop_Mode;

   201     case CompositionOp::OP_XOR:

   202       return SkXfermode::kXor_Mode;

   203     case CompositionOp::OP_MULTIPLY:

   204       return SkXfermode::kMultiply_Mode;

   205     case CompositionOp::OP_SCREEN:

   206       return SkXfermode::kScreen_Mode;

   207     case CompositionOp::OP_OVERLAY:

   208       return SkXfermode::kOverlay_Mode;

   209     case CompositionOp::OP_DARKEN:

   210       return SkXfermode::kDarken_Mode;

   211     case CompositionOp::OP_LIGHTEN:

   212       return SkXfermode::kLighten_Mode;

   213     case CompositionOp::OP_COLOR_DODGE:

   214       return SkXfermode::kColorDodge_Mode;

   215     case CompositionOp::OP_COLOR_BURN:

   216       return SkXfermode::kColorBurn_Mode;

   217     case CompositionOp::OP_HARD_LIGHT:

   218       return SkXfermode::kHardLight_Mode;

   219     case CompositionOp::OP_SOFT_LIGHT:

   220       return SkXfermode::kSoftLight_Mode;

   221     case CompositionOp::OP_DIFFERENCE:

   222       return SkXfermode::kDifference_Mode;

   223     case CompositionOp::OP_EXCLUSION:

   224       return SkXfermode::kExclusion_Mode;

   225     case CompositionOp::OP_HUE:

   226       return SkXfermode::kHue_Mode;

   227     case CompositionOp::OP_SATURATION:

   228       return SkXfermode::kSaturation_Mode;

   229     case CompositionOp::OP_COLOR:

   230       return SkXfermode::kColor_Mode;

   231     case CompositionOp::OP_LUMINOSITY:

   232       return SkXfermode::kLuminosity_Mode;

   233     default:

   234       return SkXfermode::kSrcOver_Mode;

   235   }

   236 }

   238 static inline SkColor ColorToSkColor(const Color &color, Float aAlpha)

   239 {

   240   //XXX: do a better job converting to int

   241   return SkColorSetARGB(U8CPU(color.a*aAlpha*255.0), U8CPU(color.r*255.0),

   242                         U8CPU(color.g*255.0), U8CPU(color.b*255.0));

   243 }

   245 static inline SkRect

   246 RectToSkRect(const Rect& aRect)

   247 {

   248   return SkRect::MakeXYWH(SkFloatToScalar(aRect.x), SkFloatToScalar(aRect.y),

   249                           SkFloatToScalar(aRect.width), SkFloatToScalar(aRect.height));

   250 }

   252 static inline SkRect

   253 IntRectToSkRect(const IntRect& aRect)

   254 {

   255   return SkRect::MakeXYWH(SkIntToScalar(aRect.x), SkIntToScalar(aRect.y),

   256                           SkIntToScalar(aRect.width), SkIntToScalar(aRect.height));

   257 }

   259 static inline SkIRect

   260 RectToSkIRect(const Rect& aRect)

   261 {

   262   return SkIRect::MakeXYWH(int32_t(aRect.x), int32_t(aRect.y),

   263                            int32_t(aRect.width), int32_t(aRect.height));

   264 }

   266 static inline SkIRect

   267 IntRectToSkIRect(const IntRect& aRect)

   268 {

   269   return SkIRect::MakeXYWH(aRect.x, aRect.y, aRect.width, aRect.height);

   270 }

   272 static inline Point

   273 SkPointToPoint(const SkPoint &aPoint)

   274 {

   275   return Point(SkScalarToFloat(aPoint.x()), SkScalarToFloat(aPoint.y()));

   276 }

   278 static inline Rect

   279 SkRectToRect(const SkRect &aRect)

   280 {

   281   return Rect(SkScalarToFloat(aRect.x()), SkScalarToFloat(aRect.y()),

   282               SkScalarToFloat(aRect.width()), SkScalarToFloat(aRect.height()));

   283 }

   285 static inline SkShader::TileMode

   286 ExtendModeToTileMode(ExtendMode aMode)

   287 {

   288   switch (aMode)

   289   {

   290     case ExtendMode::CLAMP:

   291       return SkShader::kClamp_TileMode;

   292     case ExtendMode::REPEAT:

   293       return SkShader::kRepeat_TileMode;

   294     case ExtendMode::REFLECT:

   295       return SkShader::kMirror_TileMode;

   296   }

   297   return SkShader::kClamp_TileMode;

   298 }

   300 }

   301 }

   303 #endif /* MOZILLA_GFX_HELPERSSKIA_H_ */

The Tor Browser / file revision

gfx/2d/HelpersSkia.h@97036ab72558

gfx/2d/HelpersSkia.h