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added stb_easy_font.h

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This commit is contained in:
Sean Barrett
2015-02-01 01:49:17 -08:00
parent 0d840ab330
commit a3e84e25dd
5 changed files with 452 additions and 17 deletions
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32
tools/README.list
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@ -1,15 +1,17 @@
stb_vorbis.c | audio | decode ogg vorbis files from file/memory to float/16-bit signed output
stb_image.h | graphics | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
stb_truetype.h | graphics | parse, decode, and rasterize characters from truetype fonts
stb_image_write.h | graphics | image writing to disk: PNG, TGA, BMP
stb_image_resize.h | graphics | resize images larger/smaller with good quality
stb_rect_pack.h | graphics | simple 2D rectangle packer with decent quality
stretchy_buffer.h | utility | typesafe dynamic array for C (i.e. approximation to vector<>), doesn't compile as C++
stb_textedit.h | UI | guts of a text editor for games etc implementing them from scratch
stb_dxt.h | 3D graphics | Fabian "ryg" Giesen's real-time DXT compressor
stb_perlin.h | 3D graphics | revised Perlin noise (3D input, 1D output)
stb_tilemap_editor.h | games | embeddable tilemap editor
stb_herringbone_wang_tile.h | games | herringbone Wang tile map generator
stb_c_lexer.h | parsing | simplify writing parsers for C-like languages
stb_divide.h | math | more useful 32-bit modulus e.g. "euclidean divide"
stb.h | misc | helper functions for C, mostly redundant in C++; basically author's personal stuff
stb_vorbis.c | audio | decode ogg vorbis files from file/memory to float/16-bit signed output
stb_image.h | graphics | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
stb_truetype.h | graphics | parse, decode, and rasterize characters from truetype fonts
stb_image_write.h | graphics | image writing to disk: PNG, TGA, BMP
stb_image_resize.h | graphics | resize images larger/smaller with good quality
stb_rect_pack.h | graphics | simple 2D rectangle packer with decent quality
stretchy_buffer.h | utility | typesafe dynamic array for C (i.e. approximation to vector<>), doesn't compile as C++
stb_textedit.h | UI | guts of a text editor for games etc implementing them from scratch
stb_dxt.h | 3D graphics | Fabian "ryg" Giesen's real-time DXT compressor
stb_perlin.h | 3D graphics | revised Perlin noise (3D input, 1D output)
stb_easy_font.h | 3D graphics | quick-and-dirty easy-to-deploy bitmap font for printing frame rate, etc
stb_tilemap_editor.h | game development | embeddable tilemap editor
stb_herringbone_wang_tile.h | game development | herringbone Wang tile map generator
stb_c_lexer.h | parsing | simplify writing parsers for C-like languages
stb_divide.h | math | more useful 32-bit modulus e.g. "euclidean divide"
stb.h | misc | helper functions for C, mostly redundant in C++; basically author's personal stuff
stb_leakcheck.h | misc | quick-and-dirty malloc/free leak-checking

211
tools/easy_font_maker.c Normal file
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// This program was used to encode the data for stb_simple_font.h
#define STB_DEFINE
#include "stb.h"
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
int w,h;
uint8 *data;
int last_x[2], last_y[2];
int num_seg[2], non_empty;
#if 0
typedef struct
{
unsigned short first_segment;
unsigned char advance;
} chardata;
typedef struct
{
unsigned char x:4;
unsigned char y:4;
unsigned char len:3;
unsigned char dir:1;
} segment;
segment *segments;
void add_seg(int x, int y, int len, int horizontal)
{
segment s;
s.x = x;
s.y = y;
s.len = len;
s.dir = horizontal;
assert(s.x == x);
assert(s.y == y);
assert(s.len == len);
stb_arr_push(segments, s);
}
#else
typedef struct
{
unsigned char first_segment:8;
unsigned char first_v_segment:8;
unsigned char advance:5;
unsigned char voff:1;
} chardata;
#define X_LIMIT 1
#define LEN_LIMIT 7
typedef struct
{
unsigned char dx:1;
unsigned char y:4;
unsigned char len:3;
} segment;
segment *segments;
segment *vsegments;
void add_seg(int x, int y, int len, int horizontal)
{
segment s;
while (x - last_x[horizontal] > X_LIMIT) {
add_seg(last_x[horizontal] + X_LIMIT, 0, 0, horizontal);
}
while (len > LEN_LIMIT) {
add_seg(x, y, LEN_LIMIT, horizontal);
len -= LEN_LIMIT;
x += LEN_LIMIT*horizontal;
y += LEN_LIMIT*!horizontal;
}
s.dx = x - last_x[horizontal];
s.y = y;
s.len = len;
non_empty += len != 0;
//assert(s.x == x);
assert(s.y == y);
assert(s.len == len);
++num_seg[horizontal];
if (horizontal)
stb_arr_push(segments, s);
else
stb_arr_push(vsegments, s);
last_x[horizontal] = x;
}
void print_segments(segment *s)
{
int i, hpos;
printf(" ");
hpos = 4;
for (i=0; i < stb_arr_len(s); ++i) {
// repack for portability
unsigned char seg = s[i].len + s[i].dx*8 + s[i].y*16;
hpos += printf("%d,", seg);
if (hpos > 72 && i+1 < stb_arr_len(s)) {
hpos = 4;
printf("\n ");
}
}
printf("\n");
}
#endif
chardata charinfo[128];
int parse_char(int x, chardata *c, int offset)
{
int start_x = x, end_x, top_y = 0, y;
c->first_segment = stb_arr_len(segments);
c->first_v_segment = stb_arr_len(vsegments) - offset;
assert(c->first_segment == stb_arr_len(segments));
assert(c->first_v_segment + offset == stb_arr_len(vsegments));
// find advance distance
end_x = x+1;
while (data[end_x*3] == 255)
++end_x;
c->advance = end_x - start_x + 1;
last_x[0] = last_x[1] = 0;
last_y[0] = last_y[1] = 0;
for (y=2; y < h; ++y) {
for (x=start_x; x < end_x; ++x) {
if (data[y*3*w+x*3+1] < 255) {
top_y = y;
break;
}
}
if (top_y)
break;
}
c->voff = top_y > 2;
if (top_y > 2)
top_y = 3;
for (x=start_x; x < end_x; ++x) {
int y;
for (y=2; y < h; ++y) {
if (data[y*3*w+x*3+1] < 255) {
if (data[y*3*w+x*3+0] == 255) { // red
int len=0;
while (y+len < h && data[(y+len)*3*w+x*3+0] == 255 && data[(y+len)*3*w+x*3+1] == 0) {
data[(y+len)*3*w+x*3+0] = 0;
++len;
}
add_seg(x-start_x,y-top_y,len,0);
}
if (data[y*3*w+x*3+2] == 255) { // blue
int len=0;
while (x+len < end_x && data[y*3*w+(x+len)*3+2] == 255 && data[y*3*w+(x+len)*3+1] == 0) {
data[y*3*w+(x+len)*3+2] = 0;
++len;
}
add_seg(x-start_x,y-top_y,len,1);
}
}
}
}
return end_x;
}
int main(int argc, char **argv)
{
int c, x=0;
data = stbi_load("easy_font_raw.png", &w, &h, 0, 3);
for (c=32; c < 127; ++c) {
x = parse_char(x, &charinfo[c], 0);
printf("%3d -- %3d %3d\n", c, charinfo[c].first_segment, charinfo[c].first_v_segment);
}
printf("===\n");
printf("%d %d %d\n", num_seg[0], num_seg[1], non_empty);
printf("%d\n", sizeof(segments[0]) * stb_arr_len(segments));
printf("%d\n", sizeof(segments[0]) * stb_arr_len(segments) + sizeof(segments[0]) * stb_arr_len(vsegments) + sizeof(charinfo[32])*95);
printf("struct {\n"
" unsigned char advance;\n"
" unsigned char h_seg;\n"
" unsigned char v_seg;\n"
"} stb_easy_font_charinfo[96] = {\n");
charinfo[c].first_segment = stb_arr_len(segments);
charinfo[c].first_v_segment = stb_arr_len(vsegments);
for (c=32; c < 128; ++c) {
if ((c & 3) == 0) printf(" ");
printf("{ %2d,%3d,%3d },",
charinfo[c].advance + 16*charinfo[c].voff,
charinfo[c].first_segment,
charinfo[c].first_v_segment);
if ((c & 3) == 3) printf("\n"); else printf(" ");
}
printf("};\n\n");
printf("unsigned char stb_easy_font_hseg[%d] = {\n", stb_arr_len(segments));
print_segments(segments);
printf("};\n\n");
printf("unsigned char stb_easy_font_vseg[%d] = {\n", stb_arr_len(vsegments));
print_segments(vsegments);
printf("};\n");
return 0;
}