reSWIGged

[wxWidgets.git] / include / wx / gifdecod.h

diff --git a/include/wx/gifdecod.h b/include/wx/gifdecod.h
index 922ac29777b62124ee176d565932a9bfc71d6cba..2fdcdd39f9edabe225755f515af215378ca67bc2 100644 (file)
--- a/include/wx/gifdecod.h
+++ b/include/wx/gifdecod.h
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        gifdecod.h
+// Name:        wx/gifdecod.h

 // Purpose:     wxGIFDecoder, GIF reader for wxImage and wxAnimation
 // Author:      Guillermo Rodriguez Garcia <guille@iies.es>
 // Version:     3.02
 // Purpose:     wxGIFDecoder, GIF reader for wxImage and wxAnimation
 // Author:      Guillermo Rodriguez Garcia <guille@iies.es>
 // Version:     3.02


@@ -11,111 +11,106 @@
 #ifndef _WX_GIFDECOD_H
 #define _WX_GIFDECOD_H
 
 #ifndef _WX_GIFDECOD_H
 #define _WX_GIFDECOD_H
 

-#ifdef __GNUG__
-#pragma interface "gifdecod.h"
-#endif
-
-#include "wx/setup.h"
+#include "wx/defs.h"

 
 #if wxUSE_STREAMS && wxUSE_GIF
 
 #include "wx/stream.h"
 #include "wx/image.h"
 
 #if wxUSE_STREAMS && wxUSE_GIF
 
 #include "wx/stream.h"
 #include "wx/image.h"

+#include "wx/animdecod.h"
+
+// internal utility used to store a frame in 8bit-per-pixel format
+class /*WXDLLEXPORT*/ GIFImage;
+

 
 

+// --------------------------------------------------------------------------
+// Constants
+// --------------------------------------------------------------------------

 
 

-typedef struct _IMAGEN
+// Error codes:
+//  Note that the error code wxGIF_TRUNCATED means that the image itself
+//  is most probably OK, but the decoder didn't reach the end of the data
+//  stream; this means that if it was not reading directly from file,
+//  the stream will not be correctly positioned. the
+//
+enum wxGIFErrorCode

 {
 {

-    unsigned int w;                 /* width */
-    unsigned int h;                 /* height */
-    unsigned int left;              /* x coord (in logical screen) */
-    unsigned int top;               /* y coord (in logical screen) */
-    int transparent;                /* transparent color (-1 = none) */
-    int disposal;                   /* disposal method (-1 = unspecified) */
-    long delay;                     /* delay in ms (-1 = unused) */
-    unsigned char *p;               /* bitmap */
-    unsigned char *pal;             /* palette */
-    struct _IMAGEN *next;           /* next image */
-    struct _IMAGEN *prev;           /* prev image */
-} IMAGEN;
-
-
-/* disposal method */
-#define D_UNSPECIFIED   -1          /* not specified */
-#define D_DONOTDISPOSE  0           /* do not dispose */
-#define D_TOBACKGROUND  1           /* restore to background colour */
-#define D_TOPREVIOUS    2           /* restore to previous image */
-
-/* error codes */
-#define E_OK            0           /* everything was OK */
-#define E_FORMATO       1           /* error in gif header */
-#define E_MEMORIA       2           /* error allocating memory */
-
-class WXDLLEXPORT wxGIFDecoder
+    wxGIF_OK = 0,                   /* everything was OK */
+    wxGIF_INVFORMAT,                /* error in gif header */
+    wxGIF_MEMERR,                   /* error allocating memory */
+    wxGIF_TRUNCATED                 /* file appears to be truncated */
+};
+
+#define MAX_BLOCK_SIZE 256          /* max. block size */
+
+
+// --------------------------------------------------------------------------
+// wxGIFDecoder class
+// --------------------------------------------------------------------------
+
+class WXDLLEXPORT wxGIFDecoder : public wxAnimationDecoder

 {
 private:
 {
 private:

-    /* logical screen */
-    unsigned int  m_screenw;        /* logical screen width */
-    unsigned int  m_screenh;        /* logical screen height */
-    int           m_background;     /* background color (-1 = none) */
-
-    /* image data */
-    bool          m_anim;           /* animated GIF */
-    int           m_nimages;        /* number of images */
-    int           m_image;          /* current image */
-    IMAGEN        *m_pimage;        /* pointer to current image */
-    IMAGEN        *m_pfirst;        /* pointer to first image */
-    IMAGEN        *m_plast;         /* pointer to last image */
-
-    /* decoder state vars */
+    // a wxArray provides a constant access time rather than a linear time
+    // like for linked lists.
+    wxArrayPtrVoid m_frames;
+
+    // decoder state vars

     int           m_restbits;       /* remaining valid bits */
     unsigned int  m_restbyte;       /* remaining bytes in this block */
     unsigned int  m_lastbyte;       /* last byte read */
     int           m_restbits;       /* remaining valid bits */
     unsigned int  m_restbyte;       /* remaining bytes in this block */
     unsigned int  m_lastbyte;       /* last byte read */

-
-    wxInputStream *m_f;             /* input file */
+    unsigned char m_buffer[MAX_BLOCK_SIZE];     /* buffer for reading */
+    unsigned char *m_bufp;          /* pointer to next byte in buffer */

 
 private:
 
 private:

-    int getcode(int bits, int abfin);
-    int dgif(IMAGEN *img, int interl, int bits);
+    int getcode(wxInputStream& stream, int bits, int abfin);
+    wxGIFErrorCode dgif(wxInputStream& stream, GIFImage *img, int interl, int bits);
+
+public:
+    // get data of current frame
+    unsigned char* GetData(size_t frame) const;
+    unsigned char* GetPalette(size_t frame) const;
+    unsigned int GetNcolours(size_t frame) const;
+    int GetTransparentColourIndex(size_t frame) const;
+    wxColour GetTransparentColour(size_t frame) const;
+
+    virtual wxSize GetFrameSize(size_t frame) const;
+    virtual wxPoint GetFramePosition(size_t frame) const;
+    virtual wxAnimationDisposal GetDisposalMethod(size_t frame) const;
+    virtual long GetDelay(size_t frame) const;
+
+    // GIFs can contain both static images and animations
+    bool IsAnimation() const
+        { return m_nFrames > 1; }

 
 public:
     // constructor, destructor, etc.
 
 public:
     // constructor, destructor, etc.

-    wxGIFDecoder(wxInputStream *s, bool anim = FALSE);
+    wxGIFDecoder();

     ~wxGIFDecoder();
     ~wxGIFDecoder();

-    bool CanRead();
-    int ReadGIF();
+
+    // load function which returns more info than just Load():
+    wxGIFErrorCode LoadGIF( wxInputStream& stream );
+
+    // free all internal frames

     void Destroy();
 
     void Destroy();
 

-    // convert current frame to wxImage
-    bool ConvertToImage(wxImage *image) const;
+public:     // implementation of wxAnimationDecoder's pure virtuals

 
 

-    // get data of current frame
-    int GetFrameIndex() const;
-    unsigned char* GetData() const;
-    unsigned char* GetPalette() const;
-    unsigned int GetWidth() const;
-    unsigned int GetHeight() const;
-    unsigned int GetLeft() const;
-    unsigned int GetTop() const;
-    int GetDisposalMethod() const;
-    int GetTransparentColour() const;
-    long GetDelay() const;
-
-    // get global data
-    unsigned int GetLogicalScreenWidth() const;
-    unsigned int GetLogicalScreenHeight() const;
-    int GetBackgroundColour() const;
-    int GetNumberOfFrames() const;
-    bool IsAnimation() const;
-
-    // move through the animation
-    bool GoFirstFrame();
-    bool GoLastFrame();
-    bool GoNextFrame(bool cyclic = FALSE);
-    bool GoPrevFrame(bool cyclic = FALSE);
-    bool GoFrame(int which);
+    virtual bool CanRead( wxInputStream& stream ) const;
+    virtual bool Load( wxInputStream& stream )
+        { return LoadGIF(stream) == wxGIF_OK; }
+
+    bool ConvertToImage(size_t frame, wxImage *image) const;
+
+    wxAnimationDecoder *Clone() const
+        { return new wxGIFDecoder; }
+    wxAnimationType GetType() const
+        { return wxANIMATION_TYPE_GIF; }
+
+private:
+    DECLARE_NO_COPY_CLASS(wxGIFDecoder)

 };
 
 
 #endif  // wxUSE_STREAM && wxUSE_GIF
 #endif  // _WX_GIFDECOD_H
 };
 
 
 #endif  // wxUSE_STREAM && wxUSE_GIF
 #endif  // _WX_GIFDECOD_H

-