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stb_easy_font: support '\n' in _width(), add _height() [untested]

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This commit is contained in:
Sean Barrett 2016-01-22 04:27:47 -08:00
parent 30015ef464
commit 8b144eb536
1 changed files with 37 additions and 11 deletions
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48
stb_easy_font.h
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@ -1,4 +1,4 @@
// stb_easy_font.h - v0.6 - bitmap font for 3D rendering - public domain
// stb_easy_font.h - v0.7 - bitmap font for 3D rendering - public domain
// Sean Barrett, Feb 2015
//
// Easy-to-deploy,
@ -16,8 +16,10 @@
// DOCUMENTATION:
//
// int stb_easy_font_width(char *text)
// int stb_easy_font_height(char *text)
//
// Takes a string without newlines and returns the horizontal size.
// Takes a string and returns the horizontal size and the
// vertical size (which can vary if 'text' has newlines).
//
// int stb_easy_font_print(float x, float y,
// char *text, unsigned char color[4],
@ -40,7 +42,7 @@
//
// You can ignore z and color if you get them from elsewhere
// This format was chosen in the hopes it would make it
// easier for you to reuse existing buffer-drawing code.
// easier for you to reuse existing vertex-buffer-drawing code.
//
// If you pass in NULL for color, it becomes 255,255,255,255.
//
@ -63,11 +65,6 @@
// compact to me; -0.5 is a reasonable compromise as long as
// you're scaling the font up.
//
// SAMPLE CODE:
//
// Here's sample code for old OpenGL; it's a lot more complicated
// to make work on modern APIs, and that's your problem.
//
// LICENSE
//
// This software is in the public domain. Where that dedication is not
@ -76,10 +73,16 @@
//
// VERSION HISTORY
//
// (2016-01-22) 0.7 width() supports multiline text; add height()
// (2015-09-13) 0.6 #include <math.h>; updated license
// (2015-02-01) 0.5 First release
#if 0
// SAMPLE CODE:
//
// Here's sample code for old OpenGL; it's a lot more complicated
// to make work on modern APIs, and that's your problem.
//
void print_string(float x, float y, char *text, float r, float g, float b)
{
static char buffer[99999]; // ~500 chars
@ -222,11 +225,34 @@ static int stb_easy_font_print(float x, float y, char *text, unsigned char color
static int stb_easy_font_width(char *text)
{
float len = 0;
float max_len = 0;
while (*text) {
len += stb_easy_font_charinfo[*text-32].advance & 15;
len += stb_easy_font_spacing_val;
if (*text == '\n') {
if (len > max_len) max_len = len;
len = 0;
} else {
len += stb_easy_font_charinfo[*text-32].advance & 15;
len += stb_easy_font_spacing_val;
}
++text;
}
return (int) ceil(len);
if (len > max_len) max_len = len;
return (int) ceil(max_len);
}
static int stb_easy_font_height(char *text)
{
float y = 0;
int nonempty_line=0;
while (*text) {
if (*text == '\n') {
y += 12;
nonempty_line = 0;
} else {
nonempty_line = 1;
}
++text;
}
return (int) ceil(y + (nonempty_line ? 12 : 0));
}
#endif