1 files changed, 188 insertions, 0 deletions
diff --git a/gfx/thebes/gfxImageSurface.h b/gfx/thebes/gfxImageSurface.h
new file mode 100644
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+++ b/gfx/thebes/gfxImageSurface.h
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+/* -*- 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_IMAGESURFACE_H
+#define GFX_IMAGESURFACE_H
+
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/RefPtr.h"
+#include "gfxASurface.h"
+#include "nsSize.h"
+
+// ARGB -- raw buffer.. wont be changed.. good for storing data.
+
+class gfxSubimageSurface;
+
+namespace mozilla {
+namespace gfx {
+class DataSourceSurface;
+class SourceSurface;
+} // namespace gfx
+} // namespace mozilla
+
+/**
+ * A raw image buffer. The format can be set in the constructor. Its main
+ * purpose is for storing read-only images and using it as a source surface,
+ * but it can also be drawn to.
+ */
+class gfxImageSurface : public gfxASurface {
+public:
+    /**
+     * Construct an image surface around an existing buffer of image data.
+     * @param aData A buffer containing the image data
+     * @param aSize The size of the buffer
+     * @param aStride The stride of the buffer
+     * @param format Format of the data
+     *
+     * @see gfxImageFormat
+     */
+    gfxImageSurface(unsigned char *aData, const mozilla::gfx::IntSize& aSize,
+                    long aStride, gfxImageFormat aFormat);
+
+    /**
+     * Construct an image surface.
+     * @param aSize The size of the buffer
+     * @param format Format of the data
+     *
+     * @see gfxImageFormat
+     */
+    gfxImageSurface(const mozilla::gfx::IntSize& size, gfxImageFormat format, bool aClear = true);
+
+    /**
+     * Construct an image surface, with a specified stride and allowing the
+     * allocation of more memory than required for the storage of the surface
+     * itself.  When aStride and aMinimalAllocation are <=0, this constructor
+     * is the equivalent of the preceeding one.
+     *
+     * @param format Format of the data
+     * @param aSize The size of the buffer
+     * @param aStride The stride of the buffer - if <=0, use ComputeStride()
+     * @param aMinimalAllocation Allocate at least this many bytes.  If smaller
+     *        than width * stride, or width*stride <=0, this value is ignored.
+     * @param aClear 
+     *
+     * @see gfxImageFormat
+     */
+    gfxImageSurface(const mozilla::gfx::IntSize& aSize, gfxImageFormat aFormat,
+                    long aStride, int32_t aMinimalAllocation, bool aClear);
+
+    explicit gfxImageSurface(cairo_surface_t *csurf);
+
+    virtual ~gfxImageSurface();
+
+    // ImageSurface methods
+    gfxImageFormat Format() const { return mFormat; }
+
+    virtual const mozilla::gfx::IntSize GetSize() const override { return mSize; }
+    int32_t Width() const {
+        if (mSize.width < 0) {
+            return 0;
+        }
+        return mSize.width;
+    }
+    int32_t Height() const {
+        if (mSize.height < 0) {
+            return 0;
+        }
+        return mSize.height;
+    }
+
+    /**
+     * Distance in bytes between the start of a line and the start of the
+     * next line.
+     */
+    int32_t Stride() const { return mStride; }
+    /**
+     * Returns a pointer for the image data. Users of this function can
+     * write to it, but must not attempt to free the buffer.
+     */
+    unsigned char* Data() const { return mData; } // delete this data under us and die.
+    /**
+     * Returns the total size of the image data.
+     */
+    int32_t GetDataSize() const {
+        if (mStride < 0 || mSize.height < 0) {
+            return 0;
+        }
+        return mStride*mSize.height;
+    }
+
+    /* Fast copy from another image surface; returns TRUE if successful, FALSE otherwise */
+    bool CopyFrom (gfxImageSurface *other);
+
+    /**
+     * Fast copy from a source surface; returns TRUE if successful, FALSE otherwise
+     * Assumes that the format of this surface is compatable with aSurface
+     */
+    bool CopyFrom (mozilla::gfx::SourceSurface *aSurface);
+
+    /**
+     * Fast copy to a source surface; returns TRUE if successful, FALSE otherwise
+     * Assumes that the format of this surface is compatible with aSurface
+     */
+    bool CopyTo (mozilla::gfx::SourceSurface *aSurface);
+
+    /**
+     * Copy to a Moz2D DataSourceSurface.
+     * Marked as virtual so that browsercomps can access this method.
+     */
+    virtual already_AddRefed<mozilla::gfx::DataSourceSurface> CopyToB8G8R8A8DataSourceSurface();
+
+    /* return new Subimage with pointing to original image starting from aRect.pos
+     * and size of aRect.size. New subimage keeping current image reference
+     */
+    already_AddRefed<gfxSubimageSurface> GetSubimage(const gfxRect& aRect);
+
+    virtual already_AddRefed<gfxImageSurface> GetAsImageSurface() override;
+
+    /** See gfxASurface.h. */
+    static long ComputeStride(const mozilla::gfx::IntSize&, gfxImageFormat);
+
+    virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+        override;
+    virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+        override;
+    virtual bool SizeOfIsMeasured() const override;
+
+protected:
+    gfxImageSurface();
+    void InitWithData(unsigned char *aData, const mozilla::gfx::IntSize& aSize,
+                      long aStride, gfxImageFormat aFormat);
+    /**
+     * See the parameters to the matching constructor.  This should only
+     * be called once, in the constructor, which has already set mSize
+     * and mFormat.
+     */
+    void AllocateAndInit(long aStride, int32_t aMinimalAllocation, bool aClear);
+    void InitFromSurface(cairo_surface_t *csurf);
+
+    long ComputeStride() const { 
+        if (mSize.height < 0 || mSize.width < 0) {
+            return 0;
+        }
+        return ComputeStride(mSize, mFormat);
+    }
+
+    void MakeInvalid();
+
+    mozilla::gfx::IntSize mSize;
+    bool mOwnsData;
+    unsigned char *mData;
+    gfxImageFormat mFormat;
+    long mStride;
+};
+
+class gfxSubimageSurface : public gfxImageSurface {
+protected:
+    friend class gfxImageSurface;
+    gfxSubimageSurface(gfxImageSurface* aParent,
+                       unsigned char* aData,
+                       const mozilla::gfx::IntSize& aSize,
+                       gfxImageFormat aFormat);
+private:
+    RefPtr<gfxImageSurface> mParent;
+};
+
+#endif /* GFX_IMAGESURFACE_H */