1 files changed, 194 insertions, 0 deletions
diff --git a/gfx/thebes/gfxImageSurface.h b/gfx/thebes/gfxImageSurface.h
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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: 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 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 */