LCOV - code coverage report
Current view: directory - objdir/dist/include - gfxImageSurface.h (source / functions) Found Hit Coverage
Test: app.info Lines: 6 4 66.7 %
Date: 2012-06-02 Functions: 6 4 66.7 %

       1                 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  * ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Oracle Corporation code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Oracle Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2005
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Stuart Parmenter <pavlov@pavlov.net>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #ifndef GFX_IMAGESURFACE_H
      39                 : #define GFX_IMAGESURFACE_H
      40                 : 
      41                 : #include "gfxASurface.h"
      42                 : #include "gfxPoint.h"
      43                 : 
      44                 : // ARGB -- raw buffer.. wont be changed.. good for storing data.
      45                 : 
      46                 : class gfxSubimageSurface;
      47                 : 
      48                 : /**
      49                 :  * A raw image buffer. The format can be set in the constructor. Its main
      50                 :  * purpose is for storing read-only images and using it as a source surface,
      51                 :  * but it can also be drawn to.
      52                 :  */
      53                 : class THEBES_API gfxImageSurface : public gfxASurface {
      54                 : public:
      55                 :     /**
      56                 :      * Construct an image surface around an existing buffer of image data.
      57                 :      * @param aData A buffer containing the image data
      58                 :      * @param aSize The size of the buffer
      59                 :      * @param aStride The stride of the buffer
      60                 :      * @param format Format of the data
      61                 :      *
      62                 :      * @see gfxImageFormat
      63                 :      */
      64                 :     gfxImageSurface(unsigned char *aData, const gfxIntSize& aSize,
      65                 :                     long aStride, gfxImageFormat aFormat);
      66                 : 
      67                 :     /**
      68                 :      * Construct an image surface.
      69                 :      * @param aSize The size of the buffer
      70                 :      * @param format Format of the data
      71                 :      *
      72                 :      * @see gfxImageFormat
      73                 :      */
      74                 :     gfxImageSurface(const gfxIntSize& size, gfxImageFormat format);
      75                 :     gfxImageSurface(cairo_surface_t *csurf);
      76                 : 
      77                 :     virtual ~gfxImageSurface();
      78                 : 
      79                 :     // ImageSurface methods
      80               0 :     gfxImageFormat Format() const { return mFormat; }
      81                 : 
      82                 :     virtual const gfxIntSize GetSize() const { return mSize; }
      83              19 :     PRInt32 Width() const { return mSize.width; }
      84              19 :     PRInt32 Height() const { return mSize.height; }
      85                 : 
      86                 :     /**
      87                 :      * Distance in bytes between the start of a line and the start of the
      88                 :      * next line.
      89                 :      */
      90              50 :     PRInt32 Stride() const { return mStride; }
      91                 :     /**
      92                 :      * Returns a pointer for the image data. Users of this function can
      93                 :      * write to it, but must not attempt to free the buffer.
      94                 :      */
      95              50 :     unsigned char* Data() const { return mData; } // delete this data under us and die.
      96                 :     /**
      97                 :      * Returns the total size of the image data.
      98                 :      */
      99               0 :     PRInt32 GetDataSize() const { return mStride*mSize.height; }
     100                 : 
     101                 :     /* Fast copy from another image surface; returns TRUE if successful, FALSE otherwise */
     102                 :     bool CopyFrom (gfxImageSurface *other);
     103                 : 
     104                 :     /* return new Subimage with pointing to original image starting from aRect.pos
     105                 :      * and size of aRect.size. New subimage keeping current image reference
     106                 :      */
     107                 :     already_AddRefed<gfxSubimageSurface> GetSubimage(const gfxRect& aRect);
     108                 : 
     109                 :     virtual already_AddRefed<gfxImageSurface> GetAsImageSurface();
     110                 : 
     111                 :     /** See gfxASurface.h. */
     112                 :     NS_OVERRIDE
     113                 :     virtual void MovePixels(const nsIntRect& aSourceRect,
     114                 :                             const nsIntPoint& aDestTopLeft);
     115                 : 
     116                 : protected:
     117                 :     gfxImageSurface();
     118                 :     void InitWithData(unsigned char *aData, const gfxIntSize& aSize,
     119                 :                       long aStride, gfxImageFormat aFormat);
     120                 :     void InitFromSurface(cairo_surface_t *csurf);
     121                 :     long ComputeStride() const { return ComputeStride(mSize, mFormat); }
     122                 : 
     123                 :     static long ComputeStride(const gfxIntSize&, gfxImageFormat);
     124                 : 
     125                 :     void MakeInvalid();
     126                 : 
     127                 :     gfxIntSize mSize;
     128                 :     bool mOwnsData;
     129                 :     unsigned char *mData;
     130                 :     gfxImageFormat mFormat;
     131                 :     long mStride;
     132                 : };
     133                 : 
     134                 : class THEBES_API gfxSubimageSurface : public gfxImageSurface {
     135                 : protected:
     136                 :     friend class gfxImageSurface;
     137                 :     gfxSubimageSurface(gfxImageSurface* aParent,
     138                 :                        unsigned char* aData,
     139                 :                        const gfxIntSize& aSize);
     140                 : private:
     141                 :     nsRefPtr<gfxImageSurface> mParent;
     142                 : };
     143                 : 
     144                 : #endif /* GFX_IMAGESURFACE_H */

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