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

gfx/2d/HelpersSkia.h@97036ab72558 (annotated)

gfx/2d/HelpersSkia.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

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.

 /* -*- 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 SkBitmap::Config
 GfxFormatToSkiaConfig(SurfaceFormat format)
 {
   switch (format)
   {
     case SurfaceFormat::B8G8R8A8:
       return SkBitmap::kARGB_8888_Config;
     case SurfaceFormat::B8G8R8X8:
       // We probably need to do something here.
       return SkBitmap::kARGB_8888_Config;
     case SurfaceFormat::R5G6B5:
       return SkBitmap::kRGB_565_Config;
     case SurfaceFormat::A8:
       return SkBitmap::kA8_Config;
     default:
       return SkBitmap::kARGB_8888_Config;
   }
 }
 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
 SkiaConfigToGfxFormat(SkBitmap::Config config)
 {
   switch (config)
   {
     case SkBitmap::kARGB_8888_Config:
       return SurfaceFormat::B8G8R8A8;
     case SkBitmap::kRGB_565_Config:
       return SurfaceFormat::R5G6B5;
     case SkBitmap::kA8_Config:
       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, 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;
   }
 }
 static inline SkColor ColorToSkColor(const Color &color, Float aAlpha)
 {
   //XXX: do a better job converting to int
   return SkColorSetARGB(U8CPU(color.a*aAlpha*255.0), U8CPU(color.r*255.0),
                         U8CPU(color.g*255.0), U8CPU(color.b*255.0));
 }
 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;
 }
 }
 }
 #endif /* MOZILLA_GFX_HELPERSSKIA_H_ */

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gfx/2d/HelpersSkia.h@97036ab72558 (annotated)

gfx/2d/HelpersSkia.h