DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (5b81998bb7ab)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
/* -*- 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_DRAWABLE_H
#define GFX_DRAWABLE_H

#include "nsISupportsImpl.h"
#include "nsAutoPtr.h"
#include "gfxTypes.h"
#include "gfxRect.h"
#include "gfxColor.h"
#include "gfxMatrix.h"
#include "gfxPattern.h"

class gfxASurface;
class gfxContext;

/**
 * gfxDrawable
 * An Interface representing something that has an intrinsic size and can draw
 * itself repeatedly.
 */
class gfxDrawable {
    NS_INLINE_DECL_REFCOUNTING(gfxDrawable)
public:
    gfxDrawable(const gfxIntSize aSize)
     : mSize(aSize) {}
    virtual ~gfxDrawable() {}

    /**
     * Draw into aContext filling aFillRect, possibly repeating, using aFilter.
     * aTransform is a userspace to "image"space matrix. For example, if Draw
     * draws using a gfxPattern, this is the matrix that should be set on the
     * pattern prior to rendering it.
     *  @return whether drawing was successful
     */
    virtual bool Draw(gfxContext* aContext,
                        const gfxRect& aFillRect,
                        bool aRepeat,
                        const gfxPattern::GraphicsFilter& aFilter,
                        const gfxMatrix& aTransform = gfxMatrix()) = 0;
    virtual gfxIntSize Size() { return mSize; }

protected:
    const gfxIntSize mSize;
};

/**
 * gfxSurfaceDrawable
 * A convenience implementation of gfxDrawable for surfaces.
 */
class gfxSurfaceDrawable : public gfxDrawable {
public:
    gfxSurfaceDrawable(gfxASurface* aSurface, const gfxIntSize aSize,
                       const gfxMatrix aTransform = gfxMatrix());
    virtual ~gfxSurfaceDrawable() {}

    virtual bool Draw(gfxContext* aContext,
                        const gfxRect& aFillRect,
                        bool aRepeat,
                        const gfxPattern::GraphicsFilter& aFilter,
                        const gfxMatrix& aTransform = gfxMatrix());

protected:
    nsRefPtr<gfxASurface> mSurface;
    const gfxMatrix mTransform;
};

/**
 * gfxDrawingCallback
 * A simple drawing functor.
 */
class gfxDrawingCallback {
    NS_INLINE_DECL_REFCOUNTING(gfxDrawingCallback)
public:
    virtual ~gfxDrawingCallback() {}

    /**
     * Draw into aContext filling aFillRect using aFilter.
     * aTransform is a userspace to "image"space matrix. For example, if Draw
     * draws using a gfxPattern, this is the matrix that should be set on the
     * pattern prior to rendering it.
     *  @return whether drawing was successful
     */
    virtual bool operator()(gfxContext* aContext,
                              const gfxRect& aFillRect,
                              const gfxPattern::GraphicsFilter& aFilter,
                              const gfxMatrix& aTransform = gfxMatrix()) = 0;

};

/**
 * gfxCallbackDrawable
 * A convenience implementation of gfxDrawable for callbacks.
 */
class gfxCallbackDrawable : public gfxDrawable {
public:
    gfxCallbackDrawable(gfxDrawingCallback* aCallback, const gfxIntSize aSize);
    virtual ~gfxCallbackDrawable() {}

    virtual bool Draw(gfxContext* aContext,
                        const gfxRect& aFillRect,
                        bool aRepeat,
                        const gfxPattern::GraphicsFilter& aFilter,
                        const gfxMatrix& aTransform = gfxMatrix());

protected:
    already_AddRefed<gfxSurfaceDrawable> MakeSurfaceDrawable(const gfxPattern::GraphicsFilter aFilter = gfxPattern::FILTER_FAST);

    nsRefPtr<gfxDrawingCallback> mCallback;
    nsRefPtr<gfxSurfaceDrawable> mSurfaceDrawable;
};

/**
 * gfxPatternDrawable
 * A convenience implementation of gfxDrawable for patterns.
 */
class gfxPatternDrawable : public gfxDrawable {
public:
    gfxPatternDrawable(gfxPattern* aPattern,
                       const gfxIntSize aSize);
    virtual ~gfxPatternDrawable() {}

    virtual bool Draw(gfxContext* aContext,
                        const gfxRect& aFillRect,
                        bool aRepeat,
                        const gfxPattern::GraphicsFilter& aFilter,
                        const gfxMatrix& aTransform = gfxMatrix());

protected:
    already_AddRefed<gfxCallbackDrawable> MakeCallbackDrawable();

    nsRefPtr<gfxPattern> mPattern;
};

#endif /* GFX_DRAWABLE_H */