260 lines
12 KiB
C
260 lines
12 KiB
C
/*****************************************************************************
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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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