Annotation of parser3/src/classes/gd/gif.h, revision 1.13
1.1 paf 1: /** @file
1.4 paf 2: Parser: image manipulations decls.
3:
4: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
5:
1.13 ! parser 6: $Id: gif.h,v 1.10.4.2 2001/09/17 16:14:04 parser Exp $
1.4 paf 7:
8: based on:
1.1 paf 9: gd.h: declarations file for the gifdraw module.
10:
11: Written by Tom Boutell, 5/94.
12: Copyright 1994, Cold Spring Harbor Labs.
13: Permission granted to use this code in any fashion provided
14: that this notice is retained and any alterations are
15: labeled as such. It is requested, but not required, that
16: you share extensions to this module with us so that we
1.2 paf 17: can incorporate them into new versions.
18: */
1.1 paf 19:
20: #ifndef GIF_H
21: #define GIF_H 1
22:
1.6 paf 23: #include "pa_config_includes.h"
24:
1.2 paf 25: #include "pa_pool.h"
1.3 paf 26: #include "pa_string.h"
1.2 paf 27:
1.1 paf 28: #define gdMaxColors 0x100
1.2 paf 29: #define HSIZE 5003 /* 80% occupancy */
30:
31: /** Image type.
32: See functions below; you will not need to change
1.1 paf 33: the elements directly. Use the provided macros to
34: access sx, sy, the color table, and colorsTotal for
1.2 paf 35: read-only purposes.
36: */
37: class gdImage : public Pooled {
38:
1.7 paf 39: public:
40:
41: //@{
42: /// @name Functions to manipulate images
1.2 paf 43: gdImage(Pool& pool) : Pooled(pool) {}
44: void Create(int asx, int asy);
45: bool CreateFromGif(FILE *fd);
46: void SetPixel(int x, int y, int color);
47: int GetPixel(int x, int y);
48: void Line(int x1, int y1, int x2, int y2, int color);
1.11 parser 49: void StyledLine(int x1, int y1, int x2, int y2, int color, const char *lineStyle);
1.2 paf 50: void Rectangle(int x1, int y1, int x2, int y2, int color);
51: void LineReplaceColor(int x1, int y1, int x2, int y2, int a, int b);
52: void FilledRectangle(int x1, int y1, int x2, int y2, int color);
1.7 paf 53: //@}
1.2 paf 54:
1.7 paf 55: /// Point type for use in polygon drawing.
1.2 paf 56: struct Point {
57: int x, y;
58: };
59:
1.11 parser 60: void Polygon(Point *p, int n, int c, bool closed=true);
1.2 paf 61: void FilledPolygon(Point *p, int n, int c);
62: void FilledPolygonReplaceColor(Point *p, int n, int a, int b);
63:
64: int ColorAllocate(int r, int g, int b);
65: int ColorClosest(int r, int g, int b);
66: int ColorExact(int r, int g, int b);
67: int ColorRGB(int r, int g, int b);
68: int Color(unsigned int rgb);
69: void ColorDeallocate(int color);
70: void SetColorTransparent(int color);
71:
72: int BoundsSafe(int x, int y);
73: void DoSetPixel(int x, int y, int color);
74:
1.3 paf 75: void Gif(String& out);
1.2 paf 76: void Arc(int cx, int cy, int w, int h, int s, int e, int color);
77: void FillToBorder(int x, int y, int border, int color);
78: void Fill(int x, int y, int color);
79: void Copy(gdImage& dst, int dstX, int dstY, int srcX, int srcY, int w, int h);
80: void CopyResized(gdImage& dst, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH);
1.11 parser 81: void SetLineWidth(int width);
82: void SetLineStyle(const char *aLineStyle);
1.2 paf 83: void SetInterlace(int interlaceArg); /* On or off(1 or 0) */
84:
1.7 paf 85: public:
1.2 paf 86:
1.7 paf 87: //@{
88: /// @name information about image. READ ONLY
1.2 paf 89: int SX() { return sx; }
90: int SY() { return sy; }
91: int ColorsTotal() { return colorsTotal; }
92: int Red(int c) { return red[c]; }
93: int Green(int c) { return green[c]; }
94: int Blue(int c) { return blue[c]; }
95: int GetTransparent() { return transparent; }
96: int GetInterlaced() { return interlace; }
1.7 paf 97: //@}
1.2 paf 98:
99: private:
1.1 paf 100:
101: unsigned char ** pixels;
102: int sx;
103: int sy;
104: int colorsTotal;
105: int red[gdMaxColors];
106: int green[gdMaxColors];
107: int blue[gdMaxColors];
108: int open[gdMaxColors];
109: int transparent;
110: int *polyInts;
111: int polyAllocated;
1.11 parser 112: int lineWidth; const char *lineStyle;
1.1 paf 113: int interlace;
114:
1.2 paf 115: private: // read gif
1.1 paf 116:
1.2 paf 117: int GetDataBlock(FILE *fd, unsigned char *buf);
118: int LWZReadByte(FILE *fd, int flag, int input_code_size);
119: void ReadImage(FILE *fd, int len, int height, unsigned char(*cmap)[256], int interlace, int ignore);
120: int DoExtension(FILE *fd, int label, int *Transparent);
121: int GetCode(FILE *fd, int code_size, int flag);
122:
123: private: // read gif
124:
125: int ZeroDataBlock;
126:
127: };
128:
1.7 paf 129: /// used by gdImage::Gif to produce buffer with bytes in GIF format
1.2 paf 130: class gdGifEncoder : public Pooled {
131: public:
132:
1.3 paf 133: gdGifEncoder(Pool& pool, gdImage& aim, String& afp);
1.2 paf 134:
1.3 paf 135: void encode(
1.2 paf 136: int GWidth, int GHeight,
137: int GInterlace, int Background,
138: int Transparent, int BitsPerPixel,
139: int *Red, int *Green, int *Blue);
140:
141: private:
142:
1.7 paf 143: /// a code_int must be able to hold 2**GIFBITS values of type int, and also -1
1.2 paf 144: typedef int code_int;
1.10 parser 145: #ifdef SIGNED_COMPARE_SLOW
1.2 paf 146: typedef unsigned long int count_int;
147: typedef unsigned short int count_short;
1.10 parser 148: #else
1.2 paf 149: typedef long int count_int;
1.10 parser 150: #endif
1.2 paf 151:
152: private:
153:
1.3 paf 154: void Putbyte(int c);
155: void Putword(int w);
156: void Write(void *buf, size_t size);
157:
1.2 paf 158: void prepare_encoder(void);
159: void BumpPixel(void);
160: int GIFNextPixel();
1.3 paf 161: void compress(int init_bits);
1.2 paf 162: void output(code_int code);
163: void cl_block(void);
164: void cl_hash(count_int hsize);
165: void char_init(void);
166: void char_out(int c);
167: void flush_char(void);
168:
169: private:
170:
171: gdImage& im;
1.3 paf 172: String& fp;
1.2 paf 173:
174: int Width, Height;
175: int curx, cury;
176: long CountDown;
177: int Pass;
178: int Interlace;
179:
180: int g_init_bits;
181:
182: int ClearCode;
183: int EOFCode;
184:
185: int n_bits; /* number of bits/code */
186: int maxbits; /* user settable max # bits/code */
187:
188: code_int maxcode; /* maximum code, given n_bits */
189: code_int maxmaxcode; /* should NEVER generate this code */
190:
191: count_int htab [HSIZE];
192: unsigned short codetab [HSIZE];
193: code_int hsize; /* for dynamic table sizing */
194:
195: code_int free_ent; /* first unused entry */
196:
197: /*
198: * block compression parameters -- after all codes are used up,
199: * and compression rate changes, start over.
200: */
201: int clear_flg;
202:
203: int offset;
204: long int in_count; /* length of input */
205: long int out_count; /* # of codes output(for debugging) */
206:
207: unsigned long cur_accum;
208: int cur_bits;
209:
210: /*
211: * Number of characters so far in this 'packet'
212: */
213: int a_count;
214:
215: /*
216: * Define the storage for the packet accumulator
217: */
218: char accum[ 256 ];
219:
220: };
221:
222: inline int gdImage::BoundsSafe(int x, int y){
223: return(!(((y < 0) ||(y >= sy)) ||((x < 0) ||(x >= sx))));
224: }
225:
226: inline /*paf int*/void gdImage::DoSetPixel(int x, int y, int color){
227: if(BoundsSafe(x, y)) pixels[x][y] = color;
228: }
1.1 paf 229:
230: #endif
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to gif.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / classes / gd