gecko-dev/gfx/thebes/gfxPattern.h

143 lines
5.0 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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 GFX_PATTERN_H
#define GFX_PATTERN_H
#include "gfxTypes.h"
#include "gfxMatrix.h"
#include "mozilla/Alignment.h"
#include "mozilla/gfx/2D.h"
#include "GraphicsFilter.h"
#include "nsISupportsImpl.h"
#include "nsAutoPtr.h"
#include "nsTArray.h"
class gfxContext;
class gfxASurface;
struct gfxRGBA;
typedef struct _cairo_pattern cairo_pattern_t;
class gfxPattern MOZ_FINAL{
NS_INLINE_DECL_REFCOUNTING(gfxPattern)
public:
gfxPattern(cairo_pattern_t *aPattern);
gfxPattern(const gfxRGBA& aColor);
gfxPattern(gfxASurface *surface); // from another surface
// linear
gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1); // linear
gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0,
gfxFloat cx1, gfxFloat cy1, gfxFloat radius1); // radial
gfxPattern(mozilla::gfx::SourceSurface *aSurface,
const mozilla::gfx::Matrix &aTransform); // Azure
cairo_pattern_t *CairoPattern();
void AddColorStop(gfxFloat offset, const gfxRGBA& c);
void SetColorStops(mozilla::gfx::GradientStops* aStops);
// This should only be called on a cairo pattern that we want to use with
// Azure. We will read back the color stops from cairo and try to look
// them up in the cache.
void CacheColorStops(mozilla::gfx::DrawTarget *aDT);
void SetMatrix(const gfxMatrix& matrix);
gfxMatrix GetMatrix() const;
gfxMatrix GetInverseMatrix() const;
/* Get an Azure Pattern for the current Cairo pattern. aPattern transform
* specifies the transform that was set on the DrawTarget when the pattern
* was set. When this is nullptr it is assumed the transform is identical
* to the current transform.
*/
mozilla::gfx::Pattern *GetPattern(mozilla::gfx::DrawTarget *aTarget,
mozilla::gfx::Matrix *aPatternTransform = nullptr);
bool IsOpaque();
enum GraphicsExtend {
EXTEND_NONE,
EXTEND_REPEAT,
EXTEND_REFLECT,
EXTEND_PAD,
// Our own private flag for setting either NONE or PAD,
// depending on what the platform does for NONE. This is only
// relevant for surface patterns; for all other patterns, it
// behaves identical to PAD. On MacOS X, this becomes "NONE",
// because Quartz does the thing that we want at image edges;
// similarily on the win32 printing surface, since
// everything's done with GDI there. On other platforms, it
// usually becomes PAD.
EXTEND_PAD_EDGE = 1000
};
// none, repeat, reflect
void SetExtend(GraphicsExtend extend);
GraphicsExtend Extend() const;
enum GraphicsPatternType {
PATTERN_SOLID,
PATTERN_SURFACE,
PATTERN_LINEAR,
PATTERN_RADIAL
};
GraphicsPatternType GetType() const;
int CairoStatus();
void SetFilter(GraphicsFilter filter);
GraphicsFilter Filter() const;
/* returns TRUE if it succeeded */
bool GetSolidColor(gfxRGBA& aColor);
already_AddRefed<gfxASurface> GetSurface();
bool IsAzure() { return !mPattern; }
mozilla::TemporaryRef<mozilla::gfx::SourceSurface> GetAzureSurface() { return mSourceSurface; }
private:
// Private destructor, to discourage deletion outside of Release():
~gfxPattern();
cairo_pattern_t *mPattern;
/**
* aPatternTransform is the cairo pattern transform --- from user space at
* the time the pattern was set, to pattern space.
* aCurrentTransform is the DrawTarget's CTM --- from user space to device
* space.
* aOriginalTransform, if non-null, is the DrawTarget's TM when
* aPatternTransform was set --- user space to device space. If null, then
* the DrawTarget's CTM is the same as the TM when aPatternTransfrom was set.
* This function sets aPatternTransform to the Azure pattern transform ---
* from pattern space to current DrawTarget user space.
*/
void AdjustTransformForPattern(mozilla::gfx::Matrix &aPatternTransform,
const mozilla::gfx::Matrix &aCurrentTransform,
const mozilla::gfx::Matrix *aOriginalTransform);
union {
mozilla::AlignedStorage2<mozilla::gfx::ColorPattern> mColorPattern;
mozilla::AlignedStorage2<mozilla::gfx::LinearGradientPattern> mLinearGradientPattern;
mozilla::AlignedStorage2<mozilla::gfx::RadialGradientPattern> mRadialGradientPattern;
mozilla::AlignedStorage2<mozilla::gfx::SurfacePattern> mSurfacePattern;
};
mozilla::gfx::Pattern *mGfxPattern;
mozilla::RefPtr<mozilla::gfx::SourceSurface> mSourceSurface;
mozilla::gfx::Matrix mTransform;
mozilla::RefPtr<mozilla::gfx::GradientStops> mStops;
GraphicsExtend mExtend;
mozilla::gfx::Filter mFilter;
};
#endif /* GFX_PATTERN_H */