Release-1.5.9-20090814

1 files changed, 90 insertions, 0 deletions

diff --git a/src/gifenc.h b/src/gifenc.h
new file mode 100644
index 0000000..cca3283
--- /dev/null
+++ b/src/gifenc.h
@@ -0,0 +1,90 @@
+/******************************************************************************
+ *
+ * $Id$
+ *
+ *
+ * Copyright (C) 1997-2009 by Dimitri van Heesch.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation under the terms of the GNU General Public License is hereby 
+ * granted. No representations are made about the suitability of this software 
+ * for any purpose. It is provided "as is" without express or implied warranty.
+ * See the GNU General Public License for more details.
+ *
+ * All output generated with Doxygen is not covered by this license.
+ *
+ */
+
+#ifndef _GIFENC_H
+#define _GIFENC_H
+#include <qfile.h>
+
+typedef unsigned char  Byte;
+typedef unsigned short Word;
+
+struct Color
+{
+  Byte red;
+  Byte green;
+  Byte blue;
+};
+
+const int hashTableSize=5003;     // size of the hash table 
+
+class GifEncoder
+{
+  public:
+    GifEncoder(Byte *rawBytes,Color *p,int w,int h,Byte d,int t);
+   ~GifEncoder();
+    void writeGIF(QFile &fp);
+   
+  protected:
+    void putWord( Word w, QFile &fp );
+    void putByte( Byte b, QFile &fp );
+    void compress(int csize, QFile &fp);
+    void writeCode(int code, QFile &fp);
+    void writeChar( Byte c, QFile &fp );
+    void writePacket(QFile &fp);
+    void clearHashTable();
+    int nextPixel()
+    {
+      if ( --numPixels < 0) return EOF;
+      return *dataPtr++;
+    }
+
+    
+  private:
+    const int colorResolution;      // 8 bit for Red, Green and Blue;
+    const int globalPaletteFlag;
+    const int bits;
+    const int maxMaxCode; 
+
+    // image variables
+    int width;             // image width 
+    int height;            // image height 
+    Byte depth;            // bits per CLUT entry 
+    int transIndex;        // index of the transparant color; -1 = none 
+    Color *palette;        // pointer to the color palette 
+    int numPixels;         // total number of pixel (i.e. width * height)
+    Byte *data;            // pointer to the image data (one byte per pixel) 
+    Byte *dataPtr;         // pointer located at the current pixel.
+    
+    // compression variables
+    bool clearFlag;        // clear hash table flag
+    int  freeEntry;        // first free entry in the hash table
+    unsigned int curAccum; // encoded bit accumulator
+    int curBits;           // number of bits in curAccum
+    Byte accum[256];       // Buffer for a packet
+    int aCount;            // Number of characters so far in this 'packet'
+    int nBits;             // number of bits/code
+    int maxCode;           // maximum code, given n_bits
+    int initBits;          // initial number of bits
+    int EOFCode;           // code for signaling the end of the file
+    int ClearCode;         // the clear code for the decompressor
+    
+    // tables
+    int htab[hashTableSize];       // the hash table
+    Word codetab[hashTableSize];   // the code table
+};
+
+#endif