?? gif_font.c
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/*****************************************************************************
* "Gif-Lib" - Yet another gif library. *
* *
* Written by: Gershon Elber IBM PC Ver 0.1, Jun. 1989 *
******************************************************************************
* Utility font handling and simple drawing for the GIF library *
******************************************************************************
* History: *
* 17 Jun 89 - Version 1.0 by Gershon Elber. *
* 25 Sep 92 - Draw functions added by Eric S. Raymond *
*****************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include "gif_lib.h"
/*****************************************************************************
* Ascii 8 by 8 regular font - only first 128 characters are supported. *
*****************************************************************************/
/*
* Each array entry holds the bits for 8 horizontal scan lines, topmost
* first. The most significant bit of each constant is the leftmost bit of
* the scan line.
*/
unsigned char AsciiTable[][GIF_FONT_WIDTH] = {
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* Ascii 0 */
{ 0x3c, 0x42, 0xa5, 0x81, 0xbd, 0x42, 0x3c, 0x00 }, /* Ascii 1 */
{ 0x3c, 0x7e, 0xdb, 0xff, 0xc3, 0x7e, 0x3c, 0x00 }, /* Ascii 2 */
{ 0x00, 0xee, 0xfe, 0xfe, 0x7c, 0x38, 0x10, 0x00 }, /* Ascii 3 */
{ 0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00 }, /* Ascii 4 */
{ 0x00, 0x3c, 0x18, 0xff, 0xff, 0x08, 0x18, 0x00 }, /* Ascii 5 */
{ 0x10, 0x38, 0x7c, 0xfe, 0xfe, 0x10, 0x38, 0x00 }, /* Ascii 6 */
{ 0x00, 0x00, 0x18, 0x3c, 0x18, 0x00, 0x00, 0x00 }, /* Ascii 7 */
{ 0xff, 0xff, 0xe7, 0xc3, 0xe7, 0xff, 0xff, 0xff }, /* Ascii 8 */
{ 0x00, 0x3c, 0x42, 0x81, 0x81, 0x42, 0x3c, 0x00 }, /* Ascii 9 */
{ 0xff, 0xc3, 0xbd, 0x7e, 0x7e, 0xbd, 0xc3, 0xff }, /* Ascii 10 */
{ 0x1f, 0x07, 0x0d, 0x7c, 0xc6, 0xc6, 0x7c, 0x00 }, /* Ascii 11 */
{ 0x00, 0x7e, 0xc3, 0xc3, 0x7e, 0x18, 0x7e, 0x18 }, /* Ascii 12 */
{ 0x04, 0x06, 0x07, 0x04, 0x04, 0xfc, 0xf8, 0x00 }, /* Ascii 13 */
{ 0x0c, 0x0a, 0x0d, 0x0b, 0xf9, 0xf9, 0x1f, 0x1f }, /* Ascii 14 */
{ 0x00, 0x92, 0x7c, 0x44, 0xc6, 0x7c, 0x92, 0x00 }, /* Ascii 15 */
{ 0x00, 0x00, 0x60, 0x78, 0x7e, 0x78, 0x60, 0x00 }, /* Ascii 16 */
{ 0x00, 0x00, 0x06, 0x1e, 0x7e, 0x1e, 0x06, 0x00 }, /* Ascii 17 */
{ 0x18, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x7e, 0x18 }, /* Ascii 18 */
{ 0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x66, 0x00 }, /* Ascii 19 */
{ 0xff, 0xb6, 0x76, 0x36, 0x36, 0x36, 0x36, 0x00 }, /* Ascii 20 */
{ 0x7e, 0xc1, 0xdc, 0x22, 0x22, 0x1f, 0x83, 0x7e }, /* Ascii 21 */
{ 0x00, 0x00, 0x00, 0x7e, 0x7e, 0x00, 0x00, 0x00 }, /* Ascii 22 */
{ 0x18, 0x7e, 0x18, 0x18, 0x7e, 0x18, 0x00, 0xff }, /* Ascii 23 */
{ 0x18, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00 }, /* Ascii 24 */
{ 0x18, 0x18, 0x18, 0x18, 0x18, 0x7e, 0x18, 0x00 }, /* Ascii 25 */
{ 0x00, 0x04, 0x06, 0xff, 0x06, 0x04, 0x00, 0x00 }, /* Ascii 26 */
{ 0x00, 0x20, 0x60, 0xff, 0x60, 0x20, 0x00, 0x00 }, /* Ascii 27 */
{ 0x00, 0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xff, 0x00 }, /* Ascii 28 */
{ 0x00, 0x24, 0x66, 0xff, 0x66, 0x24, 0x00, 0x00 }, /* Ascii 29 */
{ 0x00, 0x00, 0x10, 0x38, 0x7c, 0xfe, 0x00, 0x00 }, /* Ascii 30 */
{ 0x00, 0x00, 0x00, 0xfe, 0x7c, 0x38, 0x10, 0x00 }, /* Ascii 31 */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* */
{ 0x30, 0x30, 0x30, 0x30, 0x30, 0x00, 0x30, 0x00 }, /* ! */
{ 0x66, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* " */
{ 0x6c, 0x6c, 0xfe, 0x6c, 0xfe, 0x6c, 0x6c, 0x00 }, /* # */
{ 0x10, 0x7c, 0xd2, 0x7c, 0x86, 0x7c, 0x10, 0x00 }, /* $ */
{ 0xf0, 0x96, 0xfc, 0x18, 0x3e, 0x72, 0xde, 0x00 }, /* % */
{ 0x30, 0x48, 0x30, 0x78, 0xce, 0xcc, 0x78, 0x00 }, /* & */
{ 0x0c, 0x0c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* ' */
{ 0x10, 0x60, 0xc0, 0xc0, 0xc0, 0x60, 0x10, 0x00 }, /* ( */
{ 0x10, 0x0c, 0x06, 0x06, 0x06, 0x0c, 0x10, 0x00 }, /* ) */
{ 0x00, 0x54, 0x38, 0xfe, 0x38, 0x54, 0x00, 0x00 }, /* * */
{ 0x00, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00 }, /* + */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x70 }, /* , */
{ 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00 }, /* - */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00 }, /* . */
{ 0x02, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x00 }, /* / */
{ 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00 }, /* 0 */
{ 0x18, 0x38, 0x78, 0x18, 0x18, 0x18, 0x3c, 0x00 }, /* 1 */
{ 0x7c, 0xc6, 0x06, 0x0c, 0x30, 0x60, 0xfe, 0x00 }, /* 2 */
{ 0x7c, 0xc6, 0x06, 0x3c, 0x06, 0xc6, 0x7c, 0x00 }, /* 3 */
{ 0x0e, 0x1e, 0x36, 0x66, 0xfe, 0x06, 0x06, 0x00 }, /* 4 */
{ 0xfe, 0xc0, 0xc0, 0xfc, 0x06, 0x06, 0xfc, 0x00 }, /* 5 */
{ 0x7c, 0xc6, 0xc0, 0xfc, 0xc6, 0xc6, 0x7c, 0x00 }, /* 6 */
{ 0xfe, 0x06, 0x0c, 0x18, 0x30, 0x60, 0x60, 0x00 }, /* 7 */
{ 0x7c, 0xc6, 0xc6, 0x7c, 0xc6, 0xc6, 0x7c, 0x00 }, /* 8 */
{ 0x7c, 0xc6, 0xc6, 0x7e, 0x06, 0xc6, 0x7c, 0x00 }, /* 9 */
{ 0x00, 0x30, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00 }, /* : */
{ 0x00, 0x30, 0x00, 0x00, 0x00, 0x30, 0x20, 0x00 }, /* }, */
{ 0x00, 0x1c, 0x30, 0x60, 0x30, 0x1c, 0x00, 0x00 }, /* < */
{ 0x00, 0x00, 0x7e, 0x00, 0x7e, 0x00, 0x00, 0x00 }, /* = */
{ 0x00, 0x70, 0x18, 0x0c, 0x18, 0x70, 0x00, 0x00 }, /* > */
{ 0x7c, 0xc6, 0x0c, 0x18, 0x30, 0x00, 0x30, 0x00 }, /* ? */
{ 0x7c, 0x82, 0x9a, 0xaa, 0xaa, 0x9e, 0x7c, 0x00 }, /* @ */
{ 0x38, 0x6c, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0x00 }, /* A */
{ 0xfc, 0xc6, 0xc6, 0xfc, 0xc6, 0xc6, 0xfc, 0x00 }, /* B */
{ 0x7c, 0xc6, 0xc6, 0xc0, 0xc0, 0xc6, 0x7c, 0x00 }, /* C */
{ 0xf8, 0xcc, 0xc6, 0xc6, 0xc6, 0xcc, 0xf8, 0x00 }, /* D */
{ 0xfe, 0xc0, 0xc0, 0xfc, 0xc0, 0xc0, 0xfe, 0x00 }, /* E */
{ 0xfe, 0xc0, 0xc0, 0xfc, 0xc0, 0xc0, 0xc0, 0x00 }, /* F */
{ 0x7c, 0xc6, 0xc0, 0xce, 0xc6, 0xc6, 0x7e, 0x00 }, /* G */
{ 0xc6, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0xc6, 0x00 }, /* H */
{ 0x78, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00 }, /* I */
{ 0x1e, 0x06, 0x06, 0x06, 0xc6, 0xc6, 0x7c, 0x00 }, /* J */
{ 0xc6, 0xcc, 0xd8, 0xf0, 0xd8, 0xcc, 0xc6, 0x00 }, /* K */
{ 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xfe, 0x00 }, /* L */
{ 0xc6, 0xee, 0xfe, 0xd6, 0xc6, 0xc6, 0xc6, 0x00 }, /* M */
{ 0xc6, 0xe6, 0xf6, 0xde, 0xce, 0xc6, 0xc6, 0x00 }, /* N */
{ 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00 }, /* O */
{ 0xfc, 0xc6, 0xc6, 0xfc, 0xc0, 0xc0, 0xc0, 0x00 }, /* P */
{ 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x06 }, /* Q */
{ 0xfc, 0xc6, 0xc6, 0xfc, 0xc6, 0xc6, 0xc6, 0x00 }, /* R */
{ 0x78, 0xcc, 0x60, 0x30, 0x18, 0xcc, 0x78, 0x00 }, /* S */
{ 0xfc, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x00 }, /* T */
{ 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00 }, /* U */
{ 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x6c, 0x38, 0x00 }, /* V */
{ 0xc6, 0xc6, 0xc6, 0xd6, 0xfe, 0xee, 0xc6, 0x00 }, /* W */
{ 0xc6, 0xc6, 0x6c, 0x38, 0x6c, 0xc6, 0xc6, 0x00 }, /* X */
{ 0xc3, 0xc3, 0x66, 0x3c, 0x18, 0x18, 0x18, 0x00 }, /* Y */
{ 0xfe, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0xfe, 0x00 }, /* Z */
{ 0x3c, 0x30, 0x30, 0x30, 0x30, 0x30, 0x3c, 0x00 }, /* [ */
{ 0xc0, 0x60, 0x30, 0x18, 0x0c, 0x06, 0x03, 0x00 }, /* \ */
{ 0x3c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x3c, 0x00 }, /* ] */
{ 0x00, 0x38, 0x6c, 0xc6, 0x00, 0x00, 0x00, 0x00 }, /* ^ */
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff }, /* _ */
{ 0x30, 0x30, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* ` */
{ 0x00, 0x00, 0x7c, 0x06, 0x7e, 0xc6, 0x7e, 0x00 }, /* a */
{ 0xc0, 0xc0, 0xfc, 0xc6, 0xc6, 0xe6, 0xdc, 0x00 }, /* b */
{ 0x00, 0x00, 0x7c, 0xc6, 0xc0, 0xc0, 0x7e, 0x00 }, /* c */
{ 0x06, 0x06, 0x7e, 0xc6, 0xc6, 0xce, 0x76, 0x00 }, /* d */
{ 0x00, 0x00, 0x7c, 0xc6, 0xfe, 0xc0, 0x7e, 0x00 }, /* e */
{ 0x1e, 0x30, 0x7c, 0x30, 0x30, 0x30, 0x30, 0x00 }, /* f */
{ 0x00, 0x00, 0x7e, 0xc6, 0xce, 0x76, 0x06, 0x7c }, /* g */
{ 0xc0, 0xc0, 0xfc, 0xc6, 0xc6, 0xc6, 0xc6, 0x00 }, /* */
{ 0x18, 0x00, 0x38, 0x18, 0x18, 0x18, 0x3c, 0x00 }, /* i */
{ 0x18, 0x00, 0x38, 0x18, 0x18, 0x18, 0x18, 0xf0 }, /* j */
{ 0xc0, 0xc0, 0xcc, 0xd8, 0xf0, 0xd8, 0xcc, 0x00 }, /* k */
{ 0x38, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3c, 0x00 }, /* l */
{ 0x00, 0x00, 0xcc, 0xfe, 0xd6, 0xc6, 0xc6, 0x00 }, /* m */
{ 0x00, 0x00, 0xfc, 0xc6, 0xc6, 0xc6, 0xc6, 0x00 }, /* n */
{ 0x00, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0x7c, 0x00 }, /* o */
{ 0x00, 0x00, 0xfc, 0xc6, 0xc6, 0xe6, 0xdc, 0xc0 }, /* p */
{ 0x00, 0x00, 0x7e, 0xc6, 0xc6, 0xce, 0x76, 0x06 }, /* q */
{ 0x00, 0x00, 0x6e, 0x70, 0x60, 0x60, 0x60, 0x00 }, /* r */
{ 0x00, 0x00, 0x7c, 0xc0, 0x7c, 0x06, 0xfc, 0x00 }, /* s */
{ 0x30, 0x30, 0x7c, 0x30, 0x30, 0x30, 0x1c, 0x00 }, /* t */
{ 0x00, 0x00, 0xc6, 0xc6, 0xc6, 0xc6, 0x7e, 0x00 }, /* u */
{ 0x00, 0x00, 0xc6, 0xc6, 0xc6, 0x6c, 0x38, 0x00 }, /* v */
{ 0x00, 0x00, 0xc6, 0xc6, 0xd6, 0xfe, 0x6c, 0x00 }, /* w */
{ 0x00, 0x00, 0xc6, 0x6c, 0x38, 0x6c, 0xc6, 0x00 }, /* x */
{ 0x00, 0x00, 0xc6, 0xc6, 0xce, 0x76, 0x06, 0x7c }, /* y */
{ 0x00, 0x00, 0xfc, 0x18, 0x30, 0x60, 0xfc, 0x00 }, /* z */
{ 0x0e, 0x18, 0x18, 0x70, 0x18, 0x18, 0x0e, 0x00 }, /* { */
{ 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00 }, /* | */
{ 0xe0, 0x30, 0x30, 0x1c, 0x30, 0x30, 0xe0, 0x00 }, /* } */
{ 0x00, 0x00, 0x70, 0x9a, 0x0e, 0x00, 0x00, 0x00 }, /* ~ */
{ 0x00, 0x00, 0x18, 0x3c, 0x66, 0xff, 0x00, 0x00 } /* Ascii 127 */
};
void DrawText(SavedImage *Image,
const int x, const int y,
const char *legend,
const int color)
{
int i, j;
int base;
const char *cp;
for (i = 0; i < GIF_FONT_HEIGHT; i++)
{
base = Image->ImageDesc.Width * (y + i) + x;
for (cp = legend; *cp; cp++)
for (j = 0; j < GIF_FONT_WIDTH; j++)
{
if (AsciiTable[*cp][i] & (1 << (GIF_FONT_WIDTH - j)))
Image->RasterBits[base] = color;
base++;
}
}
}
void DrawBox(SavedImage *Image,
const int x, const int y,
const int w, const int d,
const int color)
{
int j, base = Image->ImageDesc.Width * y + x;
for (j = 0; j < w; j++)
Image->RasterBits[base + j]
= Image->RasterBits[base + (d * Image->ImageDesc.Width) + j]
= color;
for (j = 0; j < d; j++)
Image->RasterBits[base + j * Image->ImageDesc.Width]
= Image->RasterBits[base + j * Image->ImageDesc.Width + w]
= color;
}
void DrawRectangle(SavedImage *Image,
const int x, const int y,
const int w, const int d,
const int color)
{
char *bp = Image->RasterBits + Image->ImageDesc.Width * y + x;
int i;
for (i = 0; i < d; i++)
memset(bp + (i * Image->ImageDesc.Width), color, w);
}
void DrawBoxedText(SavedImage *Image,
const int x, const int y,
const char *legend,
const int border,
const int bg, const int fg)
{
int i, j = 0, LineCount = 0, TextWidth = 0;
const char *cp;
/* compute size of text to box */
for (cp = legend; *cp; cp++)
if (*cp == '\r')
{
if (j > TextWidth)
TextWidth = j;
j = 0;
LineCount++;
}
else if (*cp != '\t')
++j;
LineCount++; /* count last line */
if (j > TextWidth) /* last line might be longer than any previous */
TextWidth = j;
/* fill the box */
DrawRectangle(Image,
x + 1, y + 1,
border + TextWidth * GIF_FONT_WIDTH + border - 1,
border + LineCount * GIF_FONT_HEIGHT + border - 1,
bg);
/* draw the text */
i = 0;
cp = strtok((char *)legend, "\r\n");
do {
int leadspace = 0;
if (cp[0] == '\t')
leadspace = (TextWidth - strlen(++cp)) / 2;
DrawText(Image,
x + border + (leadspace * GIF_FONT_WIDTH),
y + border + (GIF_FONT_HEIGHT * i++),
cp, fg);
} while
(cp = strtok((char *)NULL, "\r\n"));
/* outline the box */
DrawBox(Image,
x, y,
border + TextWidth * GIF_FONT_WIDTH + border,
border + LineCount * GIF_FONT_HEIGHT + border,
fg);
}
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