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Diffstat (limited to 'archive/hge/CxImage/ximagif.h')
| -rw-r--r-- | archive/hge/CxImage/ximagif.h | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/archive/hge/CxImage/ximagif.h b/archive/hge/CxImage/ximagif.h new file mode 100644 index 0000000..4eec35e --- /dev/null +++ b/archive/hge/CxImage/ximagif.h @@ -0,0 +1,244 @@ +/*
+ * File: ximagif.h
+ * Purpose: GIF Image Class Loader and Writer
+ */
+/* ==========================================================
+ * CxImageGIF (c) 07/Aug/2001 Davide Pizzolato - www.xdp.it
+ * For conditions of distribution and use, see copyright notice in ximage.h
+ *
+ * Special thanks to Troels Knakkergaard for new features, enhancements and bugfixes
+ *
+ * original CImageGIF and CImageIterator implementation are:
+ * Copyright: (c) 1995, Alejandro Aguilar Sierra <asierra(at)servidor(dot)unam(dot)mx>
+ *
+ * 6/15/97 Randy Spann: Added GIF87a writing support
+ * R.Spann@ConnRiver.net
+ *
+ * DECODE.C - An LZW decoder for GIF
+ * Copyright (C) 1987, by Steven A. Bennett
+ * Copyright (C) 1994, C++ version by Alejandro Aguilar Sierra
+ *
+ * In accordance with the above, I want to credit Steve Wilhite who wrote
+ * the code which this is heavily inspired by...
+ *
+ * GIF and 'Graphics Interchange Format' are trademarks (tm) of
+ * Compuserve, Incorporated, an H&R Block Company.
+ *
+ * Release Notes: This file contains a decoder routine for GIF images
+ * which is similar, structurally, to the original routine by Steve Wilhite.
+ * It is, however, somewhat noticably faster in most cases.
+ *
+ * ==========================================================
+ */
+
+#if !defined(__ximaGIF_h)
+#define __ximaGIF_h
+
+#include "ximage.h"
+
+#if CXIMAGE_SUPPORT_GIF
+
+typedef int16_t code_int;
+
+/* Various error codes used by decoder */
+#define OUT_OF_MEMORY -10
+#define BAD_CODE_SIZE -20
+#define READ_ERROR -1
+#define WRITE_ERROR -2
+#define OPEN_ERROR -3
+#define CREATE_ERROR -4
+#define BAD_LINE_WIDTH -5
+#define MAX_CODES 4095
+#define GIFBUFTAM 16383
+#define TRANSPARENCY_CODE 0xF9
+
+//LZW GIF Image compression
+#define MAXBITSCODES 12
+#define HSIZE 5003 /* 80% occupancy */
+#define MAXCODE(n_bits) (((code_int) 1 << (n_bits)) - 1)
+#define HashTabOf(i) htab[i]
+#define CodeTabOf(i) codetab[i]
+
+
+class CImageIterator;
+class DLL_EXP CxImageGIF: public CxImage
+{
+#pragma pack(1)
+
+typedef struct tag_gifgce{
+ uint8_t flags; /*res:3|dispmeth:3|userinputflag:1|transpcolflag:1*/
+ uint16_t delaytime;
+ uint8_t transpcolindex;
+} struct_gifgce;
+
+typedef struct tag_dscgif{ /* Logic Screen Descriptor */
+ char header[6]; /* Firma and version */
+ uint16_t scrwidth;
+ uint16_t scrheight;
+ char pflds;
+ char bcindx;
+ char pxasrat;
+} struct_dscgif;
+
+typedef struct tag_image{ /* Image Descriptor */
+ uint16_t l;
+ uint16_t t;
+ uint16_t w;
+ uint16_t h;
+ uint8_t pf;
+} struct_image;
+
+typedef struct tag_TabCol{ /* Tabla de colores */
+ int16_t colres; /* color resolution */
+ int16_t sogct; /* size of global color table */
+ rgb_color paleta[256]; /* paleta */
+} struct_TabCol;
+
+typedef struct tag_RLE{
+ int32_t rl_pixel;
+ int32_t rl_basecode;
+ int32_t rl_count;
+ int32_t rl_table_pixel;
+ int32_t rl_table_max;
+ int32_t just_cleared;
+ int32_t out_bits;
+ int32_t out_bits_init;
+ int32_t out_count;
+ int32_t out_bump;
+ int32_t out_bump_init;
+ int32_t out_clear;
+ int32_t out_clear_init;
+ int32_t max_ocodes;
+ int32_t code_clear;
+ int32_t code_eof;
+ uint32_t obuf;
+ int32_t obits;
+ uint8_t oblock[256];
+ int32_t oblen;
+} struct_RLE;
+#pragma pack()
+
+public:
+ CxImageGIF();
+ ~CxImageGIF();
+
+// bool Load(const TCHAR * imageFileName){ return CxImage::Load(imageFileName,CXIMAGE_FORMAT_GIF);}
+// bool Save(const TCHAR * imageFileName){ return CxImage::Save(imageFileName,CXIMAGE_FORMAT_GIF);}
+
+ bool Decode(CxFile * fp);
+ bool Decode(FILE *fp) { CxIOFile file(fp); return Decode(&file); }
+
+#if CXIMAGE_SUPPORT_ENCODE
+ bool Encode(CxFile * fp);
+ bool Encode(CxFile * fp, CxImage ** pImages, int32_t pagecount, bool bLocalColorMap = false, bool bLocalDispMeth = false);
+ bool Encode(FILE *fp) { CxIOFile file(fp); return Encode(&file); }
+ bool Encode(FILE *fp, CxImage ** pImages, int32_t pagecount, bool bLocalColorMap = false)
+ { CxIOFile file(fp); return Encode(&file, pImages, pagecount, bLocalColorMap); }
+#endif // CXIMAGE_SUPPORT_ENCODE
+
+ void SetLoops(int32_t loops);
+ int32_t GetLoops();
+ void SetComment(const char* sz_comment_in);
+ void GetComment(char* sz_comment_out);
+
+protected:
+ bool DecodeExtension(CxFile *fp);
+ void EncodeHeader(CxFile *fp);
+ void EncodeLoopExtension(CxFile *fp);
+ void EncodeExtension(CxFile *fp);
+ void EncodeBody(CxFile *fp, bool bLocalColorMap = false);
+ void EncodeComment(CxFile *fp);
+ bool EncodeRGB(CxFile *fp);
+ void GifMix(CxImage & imgsrc2, struct_image & imgdesc);
+
+ struct_gifgce gifgce;
+
+ int32_t curx, cury;
+ int32_t CountDown;
+ uint32_t cur_accum;
+ int32_t cur_bits;
+ int32_t interlaced, iypos, istep, iheight, ipass;
+ int32_t ibf;
+ int32_t ibfmax;
+ uint8_t * buf;
+// Implementation
+ int32_t GifNextPixel ();
+ void Putword (int32_t w, CxFile* fp );
+ void compressNONE (int32_t init_bits, CxFile* outfile);
+ void compressLZW (int32_t init_bits, CxFile* outfile);
+ void output (code_int code );
+ void cl_hash (int32_t hsize);
+ void char_out (int32_t c);
+ void flush_char ();
+ int16_t init_exp(int16_t size);
+ int16_t get_next_code(CxFile*);
+ int16_t decoder(CxFile*, CImageIterator* iter, int16_t linewidth, int32_t &bad_code_count);
+ int32_t get_byte(CxFile*);
+ int32_t out_line(CImageIterator* iter, uint8_t *pixels, int32_t linelen);
+ int32_t get_num_frames(CxFile *f,struct_TabCol* TabColSrc,struct_dscgif* dscgif);
+ int32_t seek_next_image(CxFile* fp, int32_t position);
+
+ int16_t curr_size; /* The current code size */
+ int16_t clear; /* Value for a clear code */
+ int16_t ending; /* Value for a ending code */
+ int16_t newcodes; /* First available code */
+ int16_t top_slot; /* Highest code for current size */
+ int16_t slot; /* Last read code */
+
+ /* The following static variables are used
+ * for seperating out codes */
+ int16_t navail_bytes; /* # bytes left in block */
+ int16_t nbits_left; /* # bits left in current uint8_t */
+ uint8_t b1; /* Current uint8_t */
+ uint8_t * byte_buff; /* Current block */
+ uint8_t *pbytes; /* Pointer to next uint8_t in block */
+ /* The reason we have these seperated like this instead of using
+ * a structure like the original Wilhite code did, is because this
+ * stuff generally produces significantly faster code when compiled...
+ * This code is full of similar speedups... (For a good book on writing
+ * C for speed or for space optomisation, see Efficient C by Tom Plum,
+ * published by Plum-Hall Associates...)
+ */
+ uint8_t * stack; /* Stack for storing pixels */
+ uint8_t * suffix; /* Suffix table */
+ uint16_t * prefix; /* Prefix linked list */
+
+//LZW GIF Image compression routines
+ int32_t * htab;
+ uint16_t * codetab;
+ int32_t n_bits; /* number of bits/code */
+ code_int maxcode; /* maximum code, given n_bits */
+ code_int free_ent; /* first unused entry */
+ int32_t clear_flg;
+ int32_t g_init_bits;
+ CxFile* g_outfile;
+ int32_t ClearCode;
+ int32_t EOFCode;
+
+ int32_t a_count;
+ char * accum;
+
+ char * m_comment;
+ int32_t m_loops;
+
+//RLE compression routines
+ void compressRLE( int32_t init_bits, CxFile* outfile);
+ void rle_clear(struct_RLE* rle);
+ void rle_flush(struct_RLE* rle);
+ void rle_flush_withtable(int32_t count, struct_RLE* rle);
+ void rle_flush_clearorrep(int32_t count, struct_RLE* rle);
+ void rle_flush_fromclear(int32_t count,struct_RLE* rle);
+ void rle_output_plain(int32_t c,struct_RLE* rle);
+ void rle_reset_out_clear(struct_RLE* rle);
+ uint32_t rle_compute_triangle_count(uint32_t count, uint32_t nrepcodes);
+ uint32_t rle_isqrt(uint32_t x);
+ void rle_write_block(struct_RLE* rle);
+ void rle_block_out(uint8_t c, struct_RLE* rle);
+ void rle_block_flush(struct_RLE* rle);
+ void rle_output(int32_t val, struct_RLE* rle);
+ void rle_output_flush(struct_RLE* rle);
+};
+
+#endif
+
+#endif
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