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26: LittleEndian ( ) ; 
27: 
28: typedef struct { 
29: UBYTE R ; 
30: UBYTE G ; 
31: UBYTE B ; 
32: } RGB < read = ReadRGB > ; 
33: string ReadRGB ( RGB & color ) 
34: { 
35: string s ; 
36: SPrintf ( s , "#%02X%02X%02X" , color . R , color . G , color . B ) ; 
37: return s ; 
38: } 
39: typedef struct { 
40: local UBYTE size = ReadUByte ( FTell ( ) ) ; 
41: while ( size != 0 ) { 
42: struct DATASUBBLOCK { 
43: UBYTE Size ; 
44: char Data [ size ] ; 
45: } DataSubBlock ; 
46: size = ReadUByte ( FTell ( ) ) ; 
47: } 
48: UBYTE BlockTerminator ; 
49: } DATASUBBLOCKS ; 
50: 
51: typedef struct { 
52: char Signature [ 3 ] ; 
53: char Version [ 3 ] ; 
54: } GIFHEADER ; 
55: 
56: typedef struct { 
57: ushort Width ; 
58: ushort Height ; 
59: BitfieldLeftToRight ( ) ; 
60: struct LOGICALSCREENDESCRIPTOR_PACKEDFIELDS { 
61: UBYTE GlobalColorTableFlag : 1 ; 
62: UBYTE ColorResolution : 3 ; 
63: UBYTE SortFlag : 1 ; 
64: UBYTE SizeOfGlobalColorTable : 3 ; 
65: } PackedFields ; 
66: UBYTE BackgroundColorIndex ; 
67: UBYTE PixelAspectRatio ; 
68: } LOGICALSCREENDESCRIPTOR ; 
69: 
70: 
71: 
72: SetBackColor ( 0xFFFFFF ) ; 
73: GIFHEADER GifHeader ; 
74: if ( GifHeader . Signature != "GIF" ) 
75: { 
76: Warning ( "File is not a valid GIF. Template stopped." ) ; 
77: return - 1 ; 
78: } 
79: 
80: 
81: SetBackColor ( 0xE0E0E0 ) ; 
82: LOGICALSCREENDESCRIPTOR LogicalScreenDescriptor ; 
83: 
84: if ( LogicalScreenDescriptor . PackedFields . GlobalColorTableFlag == 1 ) { 
85: SetBackColor ( 0xC0C0C0 ) ; 
86: struct GLOBALCOLORTABLE { 
87: local int i ; 
88: local int size = 1 ; 
89: for ( i = 0 ; i <= LogicalScreenDescriptor . PackedFields . SizeOfGlobalColorTable ; i ++ ) { 
90: size *= 2 ; 
91: } 
92: RGB rgb [ size ] ; 
93: } GlobalColorTable < optimize = false > ; ; 
94: } 
95: 
96: SetBackColor ( 0xFFFFFF ) ; 
97: struct DATA { 
98: while ( ReadUByte ( FTell ( ) ) != 0x3B ) { 
99: 
100: if ( ReadUByte ( FTell ( ) ) == 0x2C ) { 
101: SetBackColor ( 0xE0FFE0 ) ; 
102: struct IMAGEDESCRIPTOR { 
103: UBYTE ImageSeperator ; 
104: ushort ImageLeftPosition ; 
105: ushort ImageTopPosition ; 
106: ushort ImageWidth ; 
107: ushort ImageHeight ; 
108: struct IMAGEDESCRIPTOR_PACKEDFIELDS { 
109: UBYTE LocalColorTableFlag : 1 ; 
110: UBYTE InterlaceFlag : 1 ; 
111: UBYTE SortFlag : 1 ; 
112: UBYTE Reserved : 2 ; 
113: UBYTE SizeOfLocalColorTable : 3 ; 
114: } PackedFields ; 
115: } ImageDescriptor ; 
116: if ( ImageDescriptor . PackedFields . LocalColorTableFlag == 1 ) { 
117: SetBackColor ( 0xC0FFC0 ) ; 
118: struct LOCALCOLORTABLE { 
119: local int i ; 
120: local int size = 1 ; 
121: for ( i = 0 ; i <= ImageDescriptor . PackedFields . SizeOfLocalColorTable ; i ++ ) { 
122: size *= 2 ; 
123: } 
124: RGB rgb [ size ] ; 
125: } LocalColorTable < optimize = false > ; ; 
126: } 
127: SetBackColor ( 0xA0FFA0 ) ; 
128: struct IMAGEDATA { 
129: UBYTE LZWMinimumCodeSize ; 
130: DATASUBBLOCKS DataSubBlocks ; 
131: } ImageData ; 
132: } else if ( ReadUShort ( FTell ( ) ) == 0xF921 ) { 
133: SetBackColor ( 0xC0FFFF ) ; 
134: struct GRAPHICCONTROLEXTENSION { 
135: UBYTE ExtensionIntroducer ; 
136: UBYTE GraphicControlLabel ; 
137: struct GRAPHICCONTROLSUBBLOCK { 
138: UBYTE BlockSize ; 
139: struct GRAPHICCONTROLEXTENSION_DATASUBBLOCK_PACKEDFIELDS { 
140: UBYTE Reserved : 3 ; 
141: UBYTE DisposalMethod : 3 ; 
142: UBYTE UserInputFlag : 1 ; 
143: UBYTE TransparentColorFlag : 1 ; 
144: } PackedFields ; 
145: ushort DelayTime ; 
146: UBYTE TransparentColorIndex ; 
147: } GraphicControlSubBlock ; 
148: UBYTE BlockTerminator ; 
149: } GraphicControlExtension ; 
150: } else if ( ReadUShort ( FTell ( ) ) == 0xFE21 ) { 
151: SetBackColor ( 0xFFFFC0 ) ; 
152: struct COMMENTEXTENSION { 
153: UBYTE ExtensionIntroducer ; 
154: UBYTE CommentLabel ; 
155: DATASUBBLOCKS CommentData ; 
156: } CommentExtension ; 
157: } else if ( ReadUShort ( FTell ( ) ) == 0x121 ) { 
158: SetBackColor ( 0xC0C0C0 ) ; 
159: struct PLAINTEXTEXTENTION { 
160: UBYTE ExtensionIntroducer ; 
161: UBYTE PlainTextLabel ; 
162: struct PLAINTEXTSUBBLOCK { 
163: UBYTE BlockSize ; 
164: ushort TextGridLeftPosition ; 
165: ushort TextGridTopPosition ; 
166: ushort TextGridWidth ; 
167: ushort TextGridHeight ; 
168: UBYTE CharacterCellWidth ; 
169: UBYTE CharacterCellHeight ; 
170: UBYTE TextForegroundColorIndex ; 
171: UBYTE TextBackgroundColorIndex ; 
172: } PlainTextSubBlock ; 
173: DATASUBBLOCKS PlainTextData ; 
174: } PlainTextExtension ; 
175: } else if ( ReadUShort ( FTell ( ) ) == 0xFF21 ) { 
176: SetBackColor ( 0xC0C0FF ) ; 
177: struct APPLICATIONEXTENTION { 
178: UBYTE ExtensionIntroducer ; 
179: UBYTE ApplicationLabel ; 
180: struct APPLICATIONSUBBLOCK { 
181: UBYTE BlockSize ; 
182: char ApplicationIdentifier [ 8 ] ; 
183: char ApplicationAuthenticationCode [ 3 ] ; 
184: } ApplicationSubBlock ; 
185: DATASUBBLOCKS ApplicationData ; 
186: } ApplicationExtension ; 
187: } else { 
188: SetBackColor ( 0xFF8080 ) ; 
189: struct UNDEFINEDDATA { 
190: UBYTE ExtensionIntroducer ; 
191: UBYTE Label ; 
192: DATASUBBLOCKS DataSubBlocks ; 
193: } UndefinedData ; 
194: } 
195: } 
196: } Data ; 
197: SetBackColor ( 0xFFFFFF ) ; 
198: struct TRAILER { 
199: UBYTE GIFTrailer ; 
200: } Trailer ; tok_eof