michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef MOZILLA_GFX_HELPERSSKIA_H_
michael@0: #define MOZILLA_GFX_HELPERSSKIA_H_
michael@0: 
michael@0: #include "2D.h"
michael@0: #include "skia/SkCanvas.h"
michael@0: #include "skia/SkDashPathEffect.h"
michael@0: #include "skia/SkShader.h"
michael@0: #ifdef USE_SKIA_GPU
michael@0: #include "skia/GrTypes.h"
michael@0: #endif
michael@0: #include "mozilla/Assertions.h"
michael@0: #include <vector>
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: static inline SkBitmap::Config
michael@0: GfxFormatToSkiaConfig(SurfaceFormat format)
michael@0: {
michael@0:   switch (format)
michael@0:   {
michael@0:     case SurfaceFormat::B8G8R8A8:
michael@0:       return SkBitmap::kARGB_8888_Config;
michael@0:     case SurfaceFormat::B8G8R8X8:
michael@0:       // We probably need to do something here.
michael@0:       return SkBitmap::kARGB_8888_Config;
michael@0:     case SurfaceFormat::R5G6B5:
michael@0:       return SkBitmap::kRGB_565_Config;
michael@0:     case SurfaceFormat::A8:
michael@0:       return SkBitmap::kA8_Config;
michael@0:     default:
michael@0:       return SkBitmap::kARGB_8888_Config;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static inline SkColorType
michael@0: GfxFormatToSkiaColorType(SurfaceFormat format)
michael@0: {
michael@0:   switch (format)
michael@0:   {
michael@0:     case SurfaceFormat::B8G8R8A8:
michael@0:       return kBGRA_8888_SkColorType;
michael@0:     case SurfaceFormat::B8G8R8X8:
michael@0:       // We probably need to do something here.
michael@0:       return kBGRA_8888_SkColorType;
michael@0:     case SurfaceFormat::R5G6B5:
michael@0:       return kRGB_565_SkColorType;
michael@0:     case SurfaceFormat::A8:
michael@0:       return kAlpha_8_SkColorType;
michael@0:     default:
michael@0:       return kRGBA_8888_SkColorType;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static inline SurfaceFormat
michael@0: SkiaConfigToGfxFormat(SkBitmap::Config config)
michael@0: {
michael@0:   switch (config)
michael@0:   {
michael@0:     case SkBitmap::kARGB_8888_Config:
michael@0:       return SurfaceFormat::B8G8R8A8;
michael@0:     case SkBitmap::kRGB_565_Config:
michael@0:       return SurfaceFormat::R5G6B5;
michael@0:     case SkBitmap::kA8_Config:
michael@0:       return SurfaceFormat::A8;
michael@0:     default:
michael@0:       return SurfaceFormat::B8G8R8A8;
michael@0:   }
michael@0: }
michael@0: 
michael@0: #ifdef USE_SKIA_GPU
michael@0: static inline GrPixelConfig
michael@0: GfxFormatToGrConfig(SurfaceFormat format)
michael@0: {
michael@0:   switch (format)
michael@0:   {
michael@0:     case SurfaceFormat::B8G8R8A8:
michael@0:       return kBGRA_8888_GrPixelConfig;
michael@0:     case SurfaceFormat::B8G8R8X8:
michael@0:       // We probably need to do something here.
michael@0:       return kBGRA_8888_GrPixelConfig;
michael@0:     case SurfaceFormat::R5G6B5:
michael@0:       return kRGB_565_GrPixelConfig;
michael@0:     case SurfaceFormat::A8:
michael@0:       return kAlpha_8_GrPixelConfig;
michael@0:     default:
michael@0:       return kRGBA_8888_GrPixelConfig;
michael@0:   }
michael@0: 
michael@0: }
michael@0: #endif
michael@0: static inline void
michael@0: GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval)
michael@0: {
michael@0:     retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21), SkFloatToScalar(mat._31),
michael@0:                   SkFloatToScalar(mat._12), SkFloatToScalar(mat._22), SkFloatToScalar(mat._32),
michael@0:                   0, 0, SK_Scalar1);
michael@0: }
michael@0: 
michael@0: static inline SkPaint::Cap
michael@0: CapStyleToSkiaCap(CapStyle aCap)
michael@0: {
michael@0:   switch (aCap)
michael@0:   {
michael@0:     case CapStyle::BUTT:
michael@0:       return SkPaint::kButt_Cap;
michael@0:     case CapStyle::ROUND:
michael@0:       return SkPaint::kRound_Cap;
michael@0:     case CapStyle::SQUARE:
michael@0:       return SkPaint::kSquare_Cap;
michael@0:   }
michael@0:   return SkPaint::kDefault_Cap;
michael@0: }
michael@0: 
michael@0: static inline SkPaint::Join
michael@0: JoinStyleToSkiaJoin(JoinStyle aJoin)
michael@0: {
michael@0:   switch (aJoin)
michael@0:   {
michael@0:     case JoinStyle::BEVEL:
michael@0:       return SkPaint::kBevel_Join;
michael@0:     case JoinStyle::ROUND:
michael@0:       return SkPaint::kRound_Join;
michael@0:     case JoinStyle::MITER:
michael@0:     case JoinStyle::MITER_OR_BEVEL:
michael@0:       return SkPaint::kMiter_Join;
michael@0:   }
michael@0:   return SkPaint::kDefault_Join;
michael@0: }
michael@0: 
michael@0: static inline bool
michael@0: StrokeOptionsToPaint(SkPaint& aPaint, const StrokeOptions &aOptions)
michael@0: {
michael@0:   // Skia renders 0 width strokes with a width of 1 (and in black),
michael@0:   // so we should just skip the draw call entirely.
michael@0:   if (!aOptions.mLineWidth) {
michael@0:     return false;
michael@0:   }
michael@0:   aPaint.setStrokeWidth(SkFloatToScalar(aOptions.mLineWidth));
michael@0:   aPaint.setStrokeMiter(SkFloatToScalar(aOptions.mMiterLimit));
michael@0:   aPaint.setStrokeCap(CapStyleToSkiaCap(aOptions.mLineCap));
michael@0:   aPaint.setStrokeJoin(JoinStyleToSkiaJoin(aOptions.mLineJoin));
michael@0: 
michael@0:   if (aOptions.mDashLength > 0) {
michael@0:     // Skia only supports dash arrays that are multiples of 2.
michael@0:     uint32_t dashCount;
michael@0: 
michael@0:     if (aOptions.mDashLength % 2 == 0) {
michael@0:       dashCount = aOptions.mDashLength;
michael@0:     } else {
michael@0:       dashCount = aOptions.mDashLength * 2;
michael@0:     }
michael@0: 
michael@0:     std::vector<SkScalar> pattern;
michael@0:     pattern.resize(dashCount);
michael@0: 
michael@0:     for (uint32_t i = 0; i < dashCount; i++) {
michael@0:       pattern[i] = SkFloatToScalar(aOptions.mDashPattern[i % aOptions.mDashLength]);
michael@0:     }
michael@0: 
michael@0:     SkDashPathEffect* dash = SkDashPathEffect::Create(&pattern.front(),
michael@0:                                                       dashCount, 
michael@0:                                                       SkFloatToScalar(aOptions.mDashOffset));
michael@0:     SkSafeUnref(aPaint.setPathEffect(dash));
michael@0:   }
michael@0: 
michael@0:   aPaint.setStyle(SkPaint::kStroke_Style);
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: static inline SkXfermode::Mode
michael@0: GfxOpToSkiaOp(CompositionOp op)
michael@0: {
michael@0:   switch (op)
michael@0:   {
michael@0:     case CompositionOp::OP_OVER:
michael@0:       return SkXfermode::kSrcOver_Mode;
michael@0:     case CompositionOp::OP_ADD:
michael@0:       return SkXfermode::kPlus_Mode;
michael@0:     case CompositionOp::OP_ATOP:
michael@0:       return SkXfermode::kSrcATop_Mode;
michael@0:     case CompositionOp::OP_OUT:
michael@0:       return SkXfermode::kSrcOut_Mode;
michael@0:     case CompositionOp::OP_IN:
michael@0:       return SkXfermode::kSrcIn_Mode;
michael@0:     case CompositionOp::OP_SOURCE:
michael@0:       return SkXfermode::kSrc_Mode;
michael@0:     case CompositionOp::OP_DEST_IN:
michael@0:       return SkXfermode::kDstIn_Mode;
michael@0:     case CompositionOp::OP_DEST_OUT:
michael@0:       return SkXfermode::kDstOut_Mode;
michael@0:     case CompositionOp::OP_DEST_OVER:
michael@0:       return SkXfermode::kDstOver_Mode;
michael@0:     case CompositionOp::OP_DEST_ATOP:
michael@0:       return SkXfermode::kDstATop_Mode;
michael@0:     case CompositionOp::OP_XOR:
michael@0:       return SkXfermode::kXor_Mode;
michael@0:     case CompositionOp::OP_MULTIPLY:
michael@0:       return SkXfermode::kMultiply_Mode;
michael@0:     case CompositionOp::OP_SCREEN:
michael@0:       return SkXfermode::kScreen_Mode;
michael@0:     case CompositionOp::OP_OVERLAY:
michael@0:       return SkXfermode::kOverlay_Mode;
michael@0:     case CompositionOp::OP_DARKEN:
michael@0:       return SkXfermode::kDarken_Mode;
michael@0:     case CompositionOp::OP_LIGHTEN:
michael@0:       return SkXfermode::kLighten_Mode;
michael@0:     case CompositionOp::OP_COLOR_DODGE:
michael@0:       return SkXfermode::kColorDodge_Mode;
michael@0:     case CompositionOp::OP_COLOR_BURN:
michael@0:       return SkXfermode::kColorBurn_Mode;
michael@0:     case CompositionOp::OP_HARD_LIGHT:
michael@0:       return SkXfermode::kHardLight_Mode;
michael@0:     case CompositionOp::OP_SOFT_LIGHT:
michael@0:       return SkXfermode::kSoftLight_Mode;
michael@0:     case CompositionOp::OP_DIFFERENCE:
michael@0:       return SkXfermode::kDifference_Mode;
michael@0:     case CompositionOp::OP_EXCLUSION:
michael@0:       return SkXfermode::kExclusion_Mode;
michael@0:     case CompositionOp::OP_HUE:
michael@0:       return SkXfermode::kHue_Mode;
michael@0:     case CompositionOp::OP_SATURATION:
michael@0:       return SkXfermode::kSaturation_Mode;
michael@0:     case CompositionOp::OP_COLOR:
michael@0:       return SkXfermode::kColor_Mode;
michael@0:     case CompositionOp::OP_LUMINOSITY:
michael@0:       return SkXfermode::kLuminosity_Mode;
michael@0:     default:
michael@0:       return SkXfermode::kSrcOver_Mode;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static inline SkColor ColorToSkColor(const Color &color, Float aAlpha)
michael@0: {
michael@0:   //XXX: do a better job converting to int
michael@0:   return SkColorSetARGB(U8CPU(color.a*aAlpha*255.0), U8CPU(color.r*255.0),
michael@0:                         U8CPU(color.g*255.0), U8CPU(color.b*255.0));
michael@0: }
michael@0: 
michael@0: static inline SkRect
michael@0: RectToSkRect(const Rect& aRect)
michael@0: {
michael@0:   return SkRect::MakeXYWH(SkFloatToScalar(aRect.x), SkFloatToScalar(aRect.y), 
michael@0:                           SkFloatToScalar(aRect.width), SkFloatToScalar(aRect.height));
michael@0: }
michael@0: 
michael@0: static inline SkRect
michael@0: IntRectToSkRect(const IntRect& aRect)
michael@0: {
michael@0:   return SkRect::MakeXYWH(SkIntToScalar(aRect.x), SkIntToScalar(aRect.y), 
michael@0:                           SkIntToScalar(aRect.width), SkIntToScalar(aRect.height));
michael@0: }
michael@0: 
michael@0: static inline SkIRect
michael@0: RectToSkIRect(const Rect& aRect)
michael@0: {
michael@0:   return SkIRect::MakeXYWH(int32_t(aRect.x), int32_t(aRect.y),
michael@0:                            int32_t(aRect.width), int32_t(aRect.height));
michael@0: }
michael@0: 
michael@0: static inline SkIRect
michael@0: IntRectToSkIRect(const IntRect& aRect)
michael@0: {
michael@0:   return SkIRect::MakeXYWH(aRect.x, aRect.y, aRect.width, aRect.height);
michael@0: }
michael@0: 
michael@0: static inline Point
michael@0: SkPointToPoint(const SkPoint &aPoint)
michael@0: {
michael@0:   return Point(SkScalarToFloat(aPoint.x()), SkScalarToFloat(aPoint.y()));
michael@0: }
michael@0: 
michael@0: static inline Rect
michael@0: SkRectToRect(const SkRect &aRect)
michael@0: {
michael@0:   return Rect(SkScalarToFloat(aRect.x()), SkScalarToFloat(aRect.y()),
michael@0:               SkScalarToFloat(aRect.width()), SkScalarToFloat(aRect.height()));
michael@0: }
michael@0: 
michael@0: static inline SkShader::TileMode
michael@0: ExtendModeToTileMode(ExtendMode aMode)
michael@0: {
michael@0:   switch (aMode)
michael@0:   {
michael@0:     case ExtendMode::CLAMP:
michael@0:       return SkShader::kClamp_TileMode;
michael@0:     case ExtendMode::REPEAT:
michael@0:       return SkShader::kRepeat_TileMode;
michael@0:     case ExtendMode::REFLECT:
michael@0:       return SkShader::kMirror_TileMode;
michael@0:   }
michael@0:   return SkShader::kClamp_TileMode;
michael@0: }
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif /* MOZILLA_GFX_HELPERSSKIA_H_ */