gecko-dev/gfx/2d/HelpersSkia.h

362 lines
11 KiB
C++

/* -*- 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_ */