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/*
This utility is just a hack to extract a monospaced bitmap font from an
image file and outputing it as C code.
Windows building:
coin-config --build extractfont extractfont.cpp -lsimage1
*/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define SIMAGE_DLL
#include <simage.h>
#include <Inventor/system/inttypes.h>
#ifndef FALSE
#define FALSE (0)
#define TRUE (!FALSE)
#endif
int
main(int argc, char ** argv)
{
setbuf(stdout, NULL);
setbuf(stderr, NULL);
static unsigned char charset[256];
int c;
for ( c = 0; c < 256; c++ ) { charset[c] = c; }
int options = 0;
int output_c = TRUE;
unsigned char * output = charset;
int outputlen = 256;
while ( argv[1+options] && argv[1+options][0] == '-' ) {
// check options
if ( strcmp(argv[1+options], "--test") == 0 ) {
options++;
output = (unsigned char *) argv[1+options];
outputlen = strlen((const char *) output);
output_c = FALSE;
}
options++;
}
if ( argc != (9 + options) ) {
printf("usage:\n");
printf(" extractfont [options] <cw> <ch> <xsp> <ysp> <xoff> <yoff> <cpl> <imagefile>\n");
printf("arguments:\n");
printf(" cw - character width\n");
printf(" ch - character height\n");
printf(" xsp - x spacing\n");
printf(" ysp - y spacing\n");
printf(" xoff - x offset\n");
printf(" yoff - y offset\n");
printf(" cpl - characters per line\n");
printf("options:\n");
printf(" --test <string>\n");
return 0;
}
int charwidth = atol(argv[1+options]);
int charheight = atol(argv[2+options]);
int xspacing = atol(argv[3+options]);
int yspacing = atol(argv[4+options]);
int xoffset = atol(argv[5+options]);
int yoffset = atol(argv[6+options]);
int charsperline = atol(argv[7+options]);
const char * imgfile = argv[8+options];
assert(imgfile);
fprintf(stderr, "char width: %d\n", charwidth);
fprintf(stderr, "char height: %d\n", charheight);
fprintf(stderr, "x offset: %d\n", xoffset);
fprintf(stderr, "y offset: %d\n", yoffset);
fprintf(stderr, "x spacing: %d\n", xspacing);
fprintf(stderr, "y spacing: %d\n", yspacing);
fprintf(stderr, "chars/line: %d\n", charsperline);
s_image * image = s_image_load(imgfile, NULL);
if ( !image ) {
printf("error: could not open file %s\n", imgfile);
return 1;
}
int width = s_image_width(image);
int height = s_image_height(image);
int components = s_image_components(image);
unsigned char * data = s_image_data(image);
assert(data);
fprintf(stderr, ">image:\n");
fprintf(stderr, "width: %d\n", width);
fprintf(stderr, "height: %d\n", height);
fprintf(stderr, "comp: %d\n", components);
fflush(stderr);
#define TRESHOLD 20
if ( output_c ) {
// printf("static uint32_t font_data[][%d] = {\n", charheight);
}
for ( c = 0; c < outputlen; c++ ) {
int letter = output[c];
int row = letter / charsperline;
int column = letter % charsperline;
if ( !output_c ) {
// output visual text for debugging
printf("letter: %c (%d, %d)\n", letter, column, row);
int x, y;
printf("+");
for ( x = 0; x < charwidth; x++ ) { printf("-"); }
printf("+\n");
for ( y = 0; y < charheight; y++ ) {
printf("|");
for ( x = 0; x < charwidth; x++ ) {
int xpos = xoffset + (column * (charwidth + xspacing)) + x;
int ypos = yoffset + (row * (charheight + yspacing)) + y;
ypos = height - (ypos + 1);
int offset = ((ypos * width) + xpos) * components;
int hit = FALSE;
int i;
if ( xpos < 0 || xpos >= width || ypos < 0 || ypos >= height ) {
} else {
for ( i = 0; i < components; i++ ) {
if ( (components == 2 && i == 1) || (components == 4 && i == 3) ) {
} else if ( data[offset+i] > TRESHOLD ) {
// dark/light scan, assuming no alpha
hit = TRUE;
}
}
}
if ( hit ) {
printf("#");
} else {
printf(" ");
}
}
printf("|\n");
}
printf("+");
for ( x = 0; x < charwidth; x++ ) { printf("-"); }
printf("+\n");
} else {
// output C/C++ code
printf(" { ");
int x, y;
for ( y = charheight - 1; y >= 0; y-- ) {
uint32_t bits = 0;
for ( x = 0; x < charwidth; x++ ) {
int xpos = xoffset + (column * (charwidth + xspacing)) + x;
int ypos = yoffset + (row * (charheight + yspacing)) + y;
ypos = height - (ypos + 1);
int offset = ((ypos * width) + xpos) * components;
int hit = FALSE;
int i;
if ( xpos < 0 || xpos >= width || ypos < 0 || ypos >= height ) {
} else {
for ( i = 0; i < components; i++ ) {
if ( (components == 2 && i == 1) || (components == 4 && i == 3) ) {
} else if ( data[offset+i] > TRESHOLD ) {
// dark/light scan, assuming no alpha
hit = TRUE;
}
}
}
bits = bits << 1;
if ( hit ) {
bits |= 1;
}
}
bits = bits << (32 - charwidth - 1);
if ( bits == 0 ) {
printf("0,0,0,0");
} else {
unsigned int part = (bits >> 24) & 0xff;
printf("0x%x", part);
part = (bits >> 16) & 0xff;
printf(",0x%x", part);
part = (bits >> 8) & 0xff;
printf(",0x%x", part);
part = bits & 0xff;
printf(",0x%x", part);
}
if ( y > 0 ) {
printf(",");
}
}
printf(" }");
if ( c < (outputlen - 1) ) { printf(","); }
if ( isprint(letter) ) {
printf(" /* letter 0x%02x '%c' */", letter, letter);
} else {
printf(" /* letter 0x%02x */", letter);
}
printf("\n");
}
}
if ( output_c ) {
// printf("};\n");
}
s_image_destroy(image);
return 0;
}
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