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259 lines
12 KiB
259 lines
12 KiB
/***************************************************************************** |
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gif_font.c - utility font handling and simple drawing for the GIF library |
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****************************************************************************/ |
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#include <string.h> |
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#include <stdlib.h> |
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#include "gif_lib.h" |
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/***************************************************************************** |
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Ascii 8 by 8 regular font - only first 128 characters are supported. |
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*****************************************************************************/ |
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/* |
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* Each array entry holds the bits for 8 horizontal scan lines, topmost |
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* first. The most significant bit of each constant is the leftmost bit of |
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* the scan line. |
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*/ |
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/*@+charint@*/ |
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const unsigned char GifAsciiTable8x8[][GIF_FONT_WIDTH] = { |
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{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, /* Ascii 0 */ |
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{0x3c, 0x42, 0xa5, 0x81, 0xbd, 0x42, 0x3c, 0x00}, /* Ascii 1 */ |
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{0x3c, 0x7e, 0xdb, 0xff, 0xc3, 0x7e, 0x3c, 0x00}, /* Ascii 2 */ |
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{0x00, 0xee, 0xfe, 0xfe, 0x7c, 0x38, 0x10, 0x00}, /* Ascii 3 */ |
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{0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00}, /* Ascii 4 */ |
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{0x00, 0x3c, 0x18, 0xff, 0xff, 0x08, 0x18, 0x00}, /* Ascii 5 */ |
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{0x10, 0x38, 0x7c, 0xfe, 0xfe, 0x10, 0x38, 0x00}, /* Ascii 6 */ |
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{0x00, 0x00, 0x18, 0x3c, 0x18, 0x00, 0x00, 0x00}, /* Ascii 7 */ |
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{0xff, 0xff, 0xe7, 0xc3, 0xe7, 0xff, 0xff, 0xff}, /* Ascii 8 */ |
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{0x00, 0x3c, 0x42, 0x81, 0x81, 0x42, 0x3c, 0x00}, /* Ascii 9 */ |
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{0xff, 0xc3, 0xbd, 0x7e, 0x7e, 0xbd, 0xc3, 0xff}, /* Ascii 10 */ |
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{0x1f, 0x07, 0x0d, 0x7c, 0xc6, 0xc6, 0x7c, 0x00}, /* Ascii 11 */ |
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{0x00, 0x7e, 0xc3, 0xc3, 0x7e, 0x18, 0x7e, 0x18}, /* Ascii 12 */ |
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{0x04, 0x06, 0x07, 0x04, 0x04, 0xfc, 0xf8, 0x00}, /* Ascii 13 */ |
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{0x0c, 0x0a, 0x0d, 0x0b, 0xf9, 0xf9, 0x1f, 0x1f}, /* Ascii 14 */ |
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{0x00, 0x92, 0x7c, 0x44, 0xc6, 0x7c, 0x92, 0x00}, /* Ascii 15 */ |
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{0x00, 0x00, 0x60, 0x78, 0x7e, 0x78, 0x60, 0x00}, /* Ascii 16 */ |
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{0x00, 0x00, 0x06, 0x1e, 0x7e, 0x1e, 0x06, 0x00}, /* Ascii 17 */ |
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{0x18, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x7e, 0x18}, /* Ascii 18 */ |
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{0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x66, 0x00}, /* Ascii 19 */ |
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{0xff, 0xb6, 0x76, 0x36, 0x36, 0x36, 0x36, 0x00}, /* Ascii 20 */ |
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{0x7e, 0xc1, 0xdc, 0x22, 0x22, 0x1f, 0x83, 0x7e}, /* Ascii 21 */ |
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{0x00, 0x00, 0x00, 0x7e, 0x7e, 0x00, 0x00, 0x00}, /* Ascii 22 */ |
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{0x18, 0x7e, 0x18, 0x18, 0x7e, 0x18, 0x00, 0xff}, /* Ascii 23 */ |
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{0x18, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00}, /* Ascii 24 */ |
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{0x18, 0x18, 0x18, 0x18, 0x18, 0x7e, 0x18, 0x00}, /* Ascii 25 */ |
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{0x00, 0x04, 0x06, 0xff, 0x06, 0x04, 0x00, 0x00}, /* Ascii 26 */ |
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{0x00, 0x20, 0x60, 0xff, 0x60, 0x20, 0x00, 0x00}, /* Ascii 27 */ |
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{0x00, 0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xff, 0x00}, /* Ascii 28 */ |
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{0x00, 0x24, 0x66, 0xff, 0x66, 0x24, 0x00, 0x00}, /* Ascii 29 */ |
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{0x00, 0x00, 0x10, 0x38, 0x7c, 0xfe, 0x00, 0x00}, /* Ascii 30 */ |
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{0x00, 0x00, 0x00, 0xfe, 0x7c, 0x38, 0x10, 0x00}, /* Ascii 31 */ |
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{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, /* */ |
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{0x30, 0x30, 0x30, 0x30, 0x30, 0x00, 0x30, 0x00}, /* ! */ |
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{0x66, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, /* " */ |
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{0x6c, 0x6c, 0xfe, 0x6c, 0xfe, 0x6c, 0x6c, 0x00}, /* # */ |
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{0x10, 0x7c, 0xd2, 0x7c, 0x86, 0x7c, 0x10, 0x00}, /* $ */ |
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{0xf0, 0x96, 0xfc, 0x18, 0x3e, 0x72, 0xde, 0x00}, /* % */ |
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{0x30, 0x48, 0x30, 0x78, 0xce, 0xcc, 0x78, 0x00}, /* & */ |
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{0x0c, 0x0c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00}, /* ' */ |
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{0x10, 0x60, 0xc0, 0xc0, 0xc0, 0x60, 0x10, 0x00}, /* ( */ |
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{0x10, 0x0c, 0x06, 0x06, 0x06, 0x0c, 0x10, 0x00}, /* ) */ |
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{0x00, 0x54, 0x38, 0xfe, 0x38, 0x54, 0x00, 0x00}, /* * */ |
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{0x00, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00}, /* + */ |
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{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x70}, /* , */ |
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{0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00}, /* - */ |
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{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00}, /* . */ |
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{0x02, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x00}, /* / */ |
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{0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00}, /* 0 */ |
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{0x18, 0x38, 0x78, 0x18, 0x18, 0x18, 0x3c, 0x00}, /* 1 */ |
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{0x7c, 0xc6, 0x06, 0x0c, 0x30, 0x60, 0xfe, 0x00}, /* 2 */ |
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{0x7c, 0xc6, 0x06, 0x3c, 0x06, 0xc6, 0x7c, 0x00}, /* 3 */ |
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{0x0e, 0x1e, 0x36, 0x66, 0xfe, 0x06, 0x06, 0x00}, /* 4 */ |
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{0xfe, 0xc0, 0xc0, 0xfc, 0x06, 0x06, 0xfc, 0x00}, /* 5 */ |
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{0x7c, 0xc6, 0xc0, 0xfc, 0xc6, 0xc6, 0x7c, 0x00}, /* 6 */ |
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{0xfe, 0x06, 0x0c, 0x18, 0x30, 0x60, 0x60, 0x00}, /* 7 */ |
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{0x7c, 0xc6, 0xc6, 0x7c, 0xc6, 0xc6, 0x7c, 0x00}, /* 8 */ |
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{0x7c, 0xc6, 0xc6, 0x7e, 0x06, 0xc6, 0x7c, 0x00}, /* 9 */ |
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{0x00, 0x30, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00}, /* : */ |
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{0x00, 0x30, 0x00, 0x00, 0x00, 0x30, 0x20, 0x00}, /* }, */ |
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{0x00, 0x1c, 0x30, 0x60, 0x30, 0x1c, 0x00, 0x00}, /* < */ |
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{0x00, 0x00, 0x7e, 0x00, 0x7e, 0x00, 0x00, 0x00}, /* = */ |
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{0x00, 0x70, 0x18, 0x0c, 0x18, 0x70, 0x00, 0x00}, /* > */ |
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{0x7c, 0xc6, 0x0c, 0x18, 0x30, 0x00, 0x30, 0x00}, /* ? */ |
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{0x7c, 0x82, 0x9a, 0xaa, 0xaa, 0x9e, 0x7c, 0x00}, /* @ */ |
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{0x38, 0x6c, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0x00}, /* A */ |
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{0xfc, 0xc6, 0xc6, 0xfc, 0xc6, 0xc6, 0xfc, 0x00}, /* B */ |
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{0x7c, 0xc6, 0xc6, 0xc0, 0xc0, 0xc6, 0x7c, 0x00}, /* C */ |
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{0xf8, 0xcc, 0xc6, 0xc6, 0xc6, 0xcc, 0xf8, 0x00}, /* D */ |
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{0xfe, 0xc0, 0xc0, 0xfc, 0xc0, 0xc0, 0xfe, 0x00}, /* E */ |
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{0xfe, 0xc0, 0xc0, 0xfc, 0xc0, 0xc0, 0xc0, 0x00}, /* F */ |
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{0x7c, 0xc6, 0xc0, 0xce, 0xc6, 0xc6, 0x7e, 0x00}, /* G */ |
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{0xc6, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0xc6, 0x00}, /* H */ |
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{0x78, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00}, /* I */ |
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{0x1e, 0x06, 0x06, 0x06, 0xc6, 0xc6, 0x7c, 0x00}, /* J */ |
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{0xc6, 0xcc, 0xd8, 0xf0, 0xd8, 0xcc, 0xc6, 0x00}, /* K */ |
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{0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xfe, 0x00}, /* L */ |
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{0xc6, 0xee, 0xfe, 0xd6, 0xc6, 0xc6, 0xc6, 0x00}, /* M */ |
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{0xc6, 0xe6, 0xf6, 0xde, 0xce, 0xc6, 0xc6, 0x00}, /* N */ |
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{0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00}, /* O */ |
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{0xfc, 0xc6, 0xc6, 0xfc, 0xc0, 0xc0, 0xc0, 0x00}, /* P */ |
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{0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x06}, /* Q */ |
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{0xfc, 0xc6, 0xc6, 0xfc, 0xc6, 0xc6, 0xc6, 0x00}, /* R */ |
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{0x78, 0xcc, 0x60, 0x30, 0x18, 0xcc, 0x78, 0x00}, /* S */ |
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{0xfc, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x00}, /* T */ |
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{0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00}, /* U */ |
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{0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x6c, 0x38, 0x00}, /* V */ |
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{0xc6, 0xc6, 0xc6, 0xd6, 0xfe, 0xee, 0xc6, 0x00}, /* W */ |
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{0xc6, 0xc6, 0x6c, 0x38, 0x6c, 0xc6, 0xc6, 0x00}, /* X */ |
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{0xc3, 0xc3, 0x66, 0x3c, 0x18, 0x18, 0x18, 0x00}, /* Y */ |
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{0xfe, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0xfe, 0x00}, /* Z */ |
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{0x3c, 0x30, 0x30, 0x30, 0x30, 0x30, 0x3c, 0x00}, /* [ */ |
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{0xc0, 0x60, 0x30, 0x18, 0x0c, 0x06, 0x03, 0x00}, /* \ */ |
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{0x3c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x3c, 0x00}, /* ] */ |
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{0x00, 0x38, 0x6c, 0xc6, 0x00, 0x00, 0x00, 0x00}, /* ^ */ |
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{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff}, /* _ */ |
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{0x30, 0x30, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00}, /* ` */ |
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{0x00, 0x00, 0x7c, 0x06, 0x7e, 0xc6, 0x7e, 0x00}, /* a */ |
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{0xc0, 0xc0, 0xfc, 0xc6, 0xc6, 0xe6, 0xdc, 0x00}, /* b */ |
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{0x00, 0x00, 0x7c, 0xc6, 0xc0, 0xc0, 0x7e, 0x00}, /* c */ |
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{0x06, 0x06, 0x7e, 0xc6, 0xc6, 0xce, 0x76, 0x00}, /* d */ |
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{0x00, 0x00, 0x7c, 0xc6, 0xfe, 0xc0, 0x7e, 0x00}, /* e */ |
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{0x1e, 0x30, 0x7c, 0x30, 0x30, 0x30, 0x30, 0x00}, /* f */ |
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{0x00, 0x00, 0x7e, 0xc6, 0xce, 0x76, 0x06, 0x7c}, /* g */ |
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{0xc0, 0xc0, 0xfc, 0xc6, 0xc6, 0xc6, 0xc6, 0x00}, /* */ |
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{0x18, 0x00, 0x38, 0x18, 0x18, 0x18, 0x3c, 0x00}, /* i */ |
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{0x18, 0x00, 0x38, 0x18, 0x18, 0x18, 0x18, 0xf0}, /* j */ |
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{0xc0, 0xc0, 0xcc, 0xd8, 0xf0, 0xd8, 0xcc, 0x00}, /* k */ |
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{0x38, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3c, 0x00}, /* l */ |
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{0x00, 0x00, 0xcc, 0xfe, 0xd6, 0xc6, 0xc6, 0x00}, /* m */ |
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{0x00, 0x00, 0xfc, 0xc6, 0xc6, 0xc6, 0xc6, 0x00}, /* n */ |
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{0x00, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0x7c, 0x00}, /* o */ |
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{0x00, 0x00, 0xfc, 0xc6, 0xc6, 0xe6, 0xdc, 0xc0}, /* p */ |
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{0x00, 0x00, 0x7e, 0xc6, 0xc6, 0xce, 0x76, 0x06}, /* q */ |
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{0x00, 0x00, 0x6e, 0x70, 0x60, 0x60, 0x60, 0x00}, /* r */ |
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{0x00, 0x00, 0x7c, 0xc0, 0x7c, 0x06, 0xfc, 0x00}, /* s */ |
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{0x30, 0x30, 0x7c, 0x30, 0x30, 0x30, 0x1c, 0x00}, /* t */ |
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{0x00, 0x00, 0xc6, 0xc6, 0xc6, 0xc6, 0x7e, 0x00}, /* u */ |
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{0x00, 0x00, 0xc6, 0xc6, 0xc6, 0x6c, 0x38, 0x00}, /* v */ |
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{0x00, 0x00, 0xc6, 0xc6, 0xd6, 0xfe, 0x6c, 0x00}, /* w */ |
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{0x00, 0x00, 0xc6, 0x6c, 0x38, 0x6c, 0xc6, 0x00}, /* x */ |
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{0x00, 0x00, 0xc6, 0xc6, 0xce, 0x76, 0x06, 0x7c}, /* y */ |
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{0x00, 0x00, 0xfc, 0x18, 0x30, 0x60, 0xfc, 0x00}, /* z */ |
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{0x0e, 0x18, 0x18, 0x70, 0x18, 0x18, 0x0e, 0x00}, /* { */ |
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{0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00}, /* | */ |
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{0xe0, 0x30, 0x30, 0x1c, 0x30, 0x30, 0xe0, 0x00}, /* } */ |
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{0x00, 0x00, 0x70, 0x9a, 0x0e, 0x00, 0x00, 0x00}, /* ~ */ |
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{0x00, 0x00, 0x18, 0x3c, 0x66, 0xff, 0x00, 0x00} /* Ascii 127 */ |
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}; |
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/*@=charint@*/ |
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void |
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GifDrawText8x8(SavedImage *Image, |
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const int x, const int y, |
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const char *legend, |
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const int color) |
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{ |
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int i, j; |
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int base; |
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const char *cp; |
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for (i = 0; i < GIF_FONT_HEIGHT; i++) { |
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base = Image->ImageDesc.Width * (y + i) + x; |
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for (cp = legend; *cp; cp++) |
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for (j = 0; j < GIF_FONT_WIDTH; j++) { |
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if (GifAsciiTable8x8[(short)(*cp)][i] & (1 << (GIF_FONT_WIDTH - j))) |
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Image->RasterBits[base] = color; |
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base++; |
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} |
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} |
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} |
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void |
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GifDrawBox(SavedImage *Image, |
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const int x, const int y, |
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const int w, const int d, |
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const int color) |
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{ |
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int j, base = Image->ImageDesc.Width * y + x; |
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for (j = 0; j < w; j++) |
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Image->RasterBits[base + j] = |
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Image->RasterBits[base + (d * Image->ImageDesc.Width) + j] = color; |
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for (j = 0; j < d; j++) |
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Image->RasterBits[base + j * Image->ImageDesc.Width] = |
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Image->RasterBits[base + j * Image->ImageDesc.Width + w] = color; |
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} |
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void |
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GifDrawRectangle(SavedImage *Image, |
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const int x, const int y, |
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const int w, const int d, |
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const int color) |
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{ |
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unsigned char *bp = Image->RasterBits + Image->ImageDesc.Width * y + x; |
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int i; |
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for (i = 0; i < d; i++) |
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memset(bp + (i * Image->ImageDesc.Width), color, (size_t)w); |
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} |
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void |
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GifDrawBoxedText8x8(SavedImage *Image, |
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const int x, const int y, |
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const char *legend, |
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const int border, |
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const int bg, const int fg) |
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{ |
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int j = 0, LineCount = 0, TextWidth = 0; |
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const char *cp; |
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char *dup; |
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/* compute size of text to box */ |
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for (cp = legend; *cp; cp++) |
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if (*cp == '\r') { |
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if (j > TextWidth) |
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TextWidth = j; |
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j = 0; |
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LineCount++; |
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} else if (*cp != '\t') |
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++j; |
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LineCount++; /* count last line */ |
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if (j > TextWidth) /* last line might be longer than any previous */ |
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TextWidth = j; |
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/* draw the text */ |
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dup = malloc(strlen(legend)+1); |
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/* FIXME: should return bad status, but that would require API change */ |
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if (dup != NULL) { |
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int i = 0; |
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/* fill the box */ |
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GifDrawRectangle(Image, x + 1, y + 1, |
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border + TextWidth * GIF_FONT_WIDTH + border - 1, |
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border + LineCount * GIF_FONT_HEIGHT + border - 1, bg); |
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(void)strcpy(dup, (char *)legend); |
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cp = strtok((char *)dup, "\r\n"); |
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do { |
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int leadspace = 0; |
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if (cp[0] == '\t') |
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leadspace = (TextWidth - strlen(++cp)) / 2; |
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GifDrawText8x8(Image, x + border + (leadspace * GIF_FONT_WIDTH), |
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y + border + (GIF_FONT_HEIGHT * i++), cp, fg); |
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cp = strtok((char *)NULL, "\r\n"); |
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} while (cp); |
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(void)free((void *)dup); |
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/* outline the box */ |
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GifDrawBox(Image, x, y, border + TextWidth * GIF_FONT_WIDTH + border, |
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border + LineCount * GIF_FONT_HEIGHT + border, fg); |
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} |
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} |
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/* end */
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