gecko/gfx/2d/DrawCommand.h

594 lines
14 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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_DRAWCOMMAND_H_
#define MOZILLA_GFX_DRAWCOMMAND_H_
#include <math.h>
#include "2D.h"
#include "Filters.h"
#include <vector>
namespace mozilla {
namespace gfx {
enum class CommandType : int8_t {
DRAWSURFACE = 0,
DRAWFILTER,
DRAWSURFACEWITHSHADOW,
CLEARRECT,
COPYSURFACE,
COPYRECT,
FILLRECT,
STROKERECT,
STROKELINE,
STROKE,
FILL,
FILLGLYPHS,
MASK,
MASKSURFACE,
PUSHCLIP,
PUSHCLIPRECT,
POPCLIP,
SETTRANSFORM,
FLUSH
};
class DrawingCommand
{
public:
virtual ~DrawingCommand() {}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix* aTransform = nullptr) const = 0;
virtual bool GetAffectedRect(Rect& aDeviceRect, const Matrix& aTransform) const { return false; }
protected:
explicit DrawingCommand(CommandType aType)
: mType(aType)
{
}
CommandType GetType() { return mType; }
private:
CommandType mType;
};
class StoredPattern
{
public:
explicit StoredPattern(const Pattern& aPattern)
{
Assign(aPattern);
}
void Assign(const Pattern& aPattern)
{
switch (aPattern.GetType()) {
case PatternType::COLOR:
new (mColor)ColorPattern(*static_cast<const ColorPattern*>(&aPattern));
return;
case PatternType::SURFACE:
{
SurfacePattern* surfPat = new (mColor)SurfacePattern(*static_cast<const SurfacePattern*>(&aPattern));
surfPat->mSurface->GuaranteePersistance();
return;
}
case PatternType::LINEAR_GRADIENT:
new (mColor)LinearGradientPattern(*static_cast<const LinearGradientPattern*>(&aPattern));
return;
case PatternType::RADIAL_GRADIENT:
new (mColor)RadialGradientPattern(*static_cast<const RadialGradientPattern*>(&aPattern));
return;
}
}
~StoredPattern()
{
reinterpret_cast<Pattern*>(mColor)->~Pattern();
}
operator Pattern&()
{
return *reinterpret_cast<Pattern*>(mColor);
}
operator const Pattern&() const
{
return *reinterpret_cast<const Pattern*>(mColor);
}
StoredPattern(const StoredPattern& aPattern)
{
Assign(aPattern);
}
private:
StoredPattern operator=(const StoredPattern& aOther)
{
// Block this so that we notice if someone's doing excessive assigning.
return *this;
}
union {
char mColor[sizeof(ColorPattern)];
char mLinear[sizeof(LinearGradientPattern)];
char mRadial[sizeof(RadialGradientPattern)];
char mSurface[sizeof(SurfacePattern)];
};
};
class DrawSurfaceCommand : public DrawingCommand
{
public:
DrawSurfaceCommand(SourceSurface *aSurface, const Rect& aDest,
const Rect& aSource, const DrawSurfaceOptions& aSurfOptions,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::DRAWSURFACE)
, mSurface(aSurface), mDest(aDest)
, mSource(aSource), mSurfOptions(aSurfOptions)
, mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->DrawSurface(mSurface, mDest, mSource, mSurfOptions, mOptions);
}
private:
RefPtr<SourceSurface> mSurface;
Rect mDest;
Rect mSource;
DrawSurfaceOptions mSurfOptions;
DrawOptions mOptions;
};
class DrawFilterCommand : public DrawingCommand
{
public:
DrawFilterCommand(FilterNode* aFilter, const Rect& aSourceRect,
const Point& aDestPoint, const DrawOptions& aOptions)
: DrawingCommand(CommandType::DRAWSURFACE)
, mFilter(aFilter), mSourceRect(aSourceRect)
, mDestPoint(aDestPoint), mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->DrawFilter(mFilter, mSourceRect, mDestPoint, mOptions);
}
private:
RefPtr<FilterNode> mFilter;
Rect mSourceRect;
Point mDestPoint;
DrawOptions mOptions;
};
class ClearRectCommand : public DrawingCommand
{
public:
explicit ClearRectCommand(const Rect& aRect)
: DrawingCommand(CommandType::CLEARRECT)
, mRect(aRect)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->ClearRect(mRect);
}
private:
Rect mRect;
};
class CopySurfaceCommand : public DrawingCommand
{
public:
CopySurfaceCommand(SourceSurface* aSurface,
const IntRect& aSourceRect,
const IntPoint& aDestination)
: DrawingCommand(CommandType::COPYSURFACE)
, mSurface(aSurface)
, mSourceRect(aSourceRect)
, mDestination(aDestination)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix* aTransform) const
{
MOZ_ASSERT(!aTransform || !aTransform->HasNonIntegerTranslation());
Point dest(Float(mDestination.x), Float(mDestination.y));
if (aTransform) {
dest = (*aTransform) * dest;
}
aDT->CopySurface(mSurface, mSourceRect, IntPoint(uint32_t(dest.x), uint32_t(dest.y)));
}
private:
RefPtr<SourceSurface> mSurface;
IntRect mSourceRect;
IntPoint mDestination;
};
class FillRectCommand : public DrawingCommand
{
public:
FillRectCommand(const Rect& aRect,
const Pattern& aPattern,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::FILLRECT)
, mRect(aRect)
, mPattern(aPattern)
, mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->FillRect(mRect, mPattern, mOptions);
}
bool GetAffectedRect(Rect& aDeviceRect, const Matrix& aTransform) const
{
aDeviceRect = aTransform.TransformBounds(mRect);
return true;
}
private:
Rect mRect;
StoredPattern mPattern;
DrawOptions mOptions;
};
class StrokeRectCommand : public DrawingCommand
{
public:
StrokeRectCommand(const Rect& aRect,
const Pattern& aPattern,
const StrokeOptions& aStrokeOptions,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::STROKERECT)
, mRect(aRect)
, mPattern(aPattern)
, mStrokeOptions(aStrokeOptions)
, mOptions(aOptions)
{
if (aStrokeOptions.mDashLength) {
mDashes.resize(aStrokeOptions.mDashLength);
mStrokeOptions.mDashPattern = &mDashes.front();
memcpy(&mDashes.front(), aStrokeOptions.mDashPattern, mStrokeOptions.mDashLength * sizeof(Float));
}
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->StrokeRect(mRect, mPattern, mStrokeOptions, mOptions);
}
private:
Rect mRect;
StoredPattern mPattern;
StrokeOptions mStrokeOptions;
DrawOptions mOptions;
std::vector<Float> mDashes;
};
class StrokeLineCommand : public DrawingCommand
{
public:
StrokeLineCommand(const Point& aStart,
const Point& aEnd,
const Pattern& aPattern,
const StrokeOptions& aStrokeOptions,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::STROKELINE)
, mStart(aStart)
, mEnd(aEnd)
, mPattern(aPattern)
, mStrokeOptions(aStrokeOptions)
, mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->StrokeLine(mStart, mEnd, mPattern, mStrokeOptions, mOptions);
}
private:
Point mStart;
Point mEnd;
StoredPattern mPattern;
StrokeOptions mStrokeOptions;
DrawOptions mOptions;
};
class FillCommand : public DrawingCommand
{
public:
FillCommand(const Path* aPath,
const Pattern& aPattern,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::FILL)
, mPath(const_cast<Path*>(aPath))
, mPattern(aPattern)
, mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->Fill(mPath, mPattern, mOptions);
}
bool GetAffectedRect(Rect& aDeviceRect, const Matrix& aTransform) const
{
aDeviceRect = mPath->GetBounds(aTransform);
return true;
}
private:
RefPtr<Path> mPath;
StoredPattern mPattern;
DrawOptions mOptions;
};
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880
#endif
#ifndef M_SQRT1_2
#define M_SQRT1_2 0.707106781186547524400844362104849039
#endif
// The logic for this comes from _cairo_stroke_style_max_distance_from_path
static Rect
PathExtentsToMaxStrokeExtents(const StrokeOptions &aStrokeOptions,
const Rect &aRect,
const Matrix &aTransform)
{
double styleExpansionFactor = 0.5f;
if (aStrokeOptions.mLineCap == CapStyle::SQUARE) {
styleExpansionFactor = M_SQRT1_2;
}
if (aStrokeOptions.mLineJoin == JoinStyle::MITER &&
styleExpansionFactor < M_SQRT2 * aStrokeOptions.mMiterLimit) {
styleExpansionFactor = M_SQRT2 * aStrokeOptions.mMiterLimit;
}
styleExpansionFactor *= aStrokeOptions.mLineWidth;
double dx = styleExpansionFactor * hypot(aTransform._11, aTransform._21);
double dy = styleExpansionFactor * hypot(aTransform._22, aTransform._12);
Rect result = aRect;
result.Inflate(dx, dy);
return result;
}
class StrokeCommand : public DrawingCommand
{
public:
StrokeCommand(const Path* aPath,
const Pattern& aPattern,
const StrokeOptions& aStrokeOptions,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::STROKE)
, mPath(const_cast<Path*>(aPath))
, mPattern(aPattern)
, mStrokeOptions(aStrokeOptions)
, mOptions(aOptions)
{
if (aStrokeOptions.mDashLength) {
mDashes.resize(aStrokeOptions.mDashLength);
mStrokeOptions.mDashPattern = &mDashes.front();
memcpy(&mDashes.front(), aStrokeOptions.mDashPattern, mStrokeOptions.mDashLength * sizeof(Float));
}
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->Stroke(mPath, mPattern, mStrokeOptions, mOptions);
}
bool GetAffectedRect(Rect& aDeviceRect, const Matrix& aTransform) const
{
aDeviceRect = PathExtentsToMaxStrokeExtents(mStrokeOptions, mPath->GetBounds(aTransform), aTransform);
return true;
}
private:
RefPtr<Path> mPath;
StoredPattern mPattern;
StrokeOptions mStrokeOptions;
DrawOptions mOptions;
std::vector<Float> mDashes;
};
class FillGlyphsCommand : public DrawingCommand
{
public:
FillGlyphsCommand(ScaledFont* aFont,
const GlyphBuffer& aBuffer,
const Pattern& aPattern,
const DrawOptions& aOptions,
const GlyphRenderingOptions* aRenderingOptions)
: DrawingCommand(CommandType::FILLGLYPHS)
, mFont(aFont)
, mPattern(aPattern)
, mOptions(aOptions)
, mRenderingOptions(const_cast<GlyphRenderingOptions*>(aRenderingOptions))
{
mGlyphs.resize(aBuffer.mNumGlyphs);
memcpy(&mGlyphs.front(), aBuffer.mGlyphs, sizeof(Glyph) * aBuffer.mNumGlyphs);
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
GlyphBuffer buf;
buf.mNumGlyphs = mGlyphs.size();
buf.mGlyphs = &mGlyphs.front();
aDT->FillGlyphs(mFont, buf, mPattern, mOptions, mRenderingOptions);
}
private:
RefPtr<ScaledFont> mFont;
std::vector<Glyph> mGlyphs;
StoredPattern mPattern;
DrawOptions mOptions;
RefPtr<GlyphRenderingOptions> mRenderingOptions;
};
class MaskCommand : public DrawingCommand
{
public:
MaskCommand(const Pattern& aSource,
const Pattern& aMask,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::MASK)
, mSource(aSource)
, mMask(aMask)
, mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->Mask(mSource, mMask, mOptions);
}
private:
StoredPattern mSource;
StoredPattern mMask;
DrawOptions mOptions;
};
class MaskSurfaceCommand : public DrawingCommand
{
public:
MaskSurfaceCommand(const Pattern& aSource,
const SourceSurface* aMask,
const Point& aOffset,
const DrawOptions& aOptions)
: DrawingCommand(CommandType::MASKSURFACE)
, mSource(aSource)
, mMask(const_cast<SourceSurface*>(aMask))
, mOffset(aOffset)
, mOptions(aOptions)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->MaskSurface(mSource, mMask, mOffset, mOptions);
}
private:
StoredPattern mSource;
RefPtr<SourceSurface> mMask;
Point mOffset;
DrawOptions mOptions;
};
class PushClipCommand : public DrawingCommand
{
public:
explicit PushClipCommand(const Path* aPath)
: DrawingCommand(CommandType::PUSHCLIP)
, mPath(const_cast<Path*>(aPath))
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->PushClip(mPath);
}
private:
RefPtr<Path> mPath;
};
class PushClipRectCommand : public DrawingCommand
{
public:
explicit PushClipRectCommand(const Rect& aRect)
: DrawingCommand(CommandType::PUSHCLIPRECT)
, mRect(aRect)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->PushClipRect(mRect);
}
private:
Rect mRect;
};
class PopClipCommand : public DrawingCommand
{
public:
PopClipCommand()
: DrawingCommand(CommandType::POPCLIP)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->PopClip();
}
};
class SetTransformCommand : public DrawingCommand
{
public:
explicit SetTransformCommand(const Matrix& aTransform)
: DrawingCommand(CommandType::SETTRANSFORM)
, mTransform(aTransform)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix* aMatrix) const
{
if (aMatrix) {
aDT->SetTransform(mTransform * (*aMatrix));
} else {
aDT->SetTransform(mTransform);
}
}
private:
Matrix mTransform;
};
class FlushCommand : public DrawingCommand
{
public:
explicit FlushCommand()
: DrawingCommand(CommandType::FLUSH)
{
}
virtual void ExecuteOnDT(DrawTarget* aDT, const Matrix*) const
{
aDT->Flush();
}
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_DRAWCOMMAND_H_ */