stb_easy_font.h - third_party/stb - Git at Google

 // stb_easy_font.h - v1.1 - bitmap font for 3D rendering - public domain
 // Sean Barrett, Feb 2015
 //
 //    Easy-to-deploy,
 //    reasonably compact,
 //    extremely inefficient performance-wise,
 //    crappy-looking,
 //    ASCII-only,
 //    bitmap font for use in 3D APIs.
 //
 // Intended for when you just want to get some text displaying
 // in a 3D app as quickly as possible.
 //
 // Doesn't use any textures, instead builds characters out of quads.
 //
 // DOCUMENTATION:
 //
 //   int stb_easy_font_width(char *text)
 //   int stb_easy_font_height(char *text)
 //
 //      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],
 //                           void *vertex_buffer, int vbuf_size)
 //
 //      Takes a string (which can contain '\n') and fills out a
 //      vertex buffer with renderable data to draw the string.
 //      Output data assumes increasing x is rightwards, increasing y
 //      is downwards.
 //
 //      The vertex data is divided into quads, i.e. there are four
 //      vertices in the vertex buffer for each quad.
 //
 //      The vertices are stored in an interleaved format:
 //
 //         x:float
 //         y:float
 //         z:float
 //         color:uint8[4]
 //
 //      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 vertex-buffer-drawing code.
 //
 //      If you pass in NULL for color, it becomes 255,255,255,255.
 //
 //      Returns the number of quads.
 //
 //      If the buffer isn't large enough, it will truncate.
 //      Expect it to use an average of ~270 bytes per character.
 //
 //      If your API doesn't draw quads, build a reusable index
 //      list that allows you to render quads as indexed triangles.
 //
 //   void stb_easy_font_spacing(float spacing)
 //
 //      Use positive values to expand the space between characters,
 //      and small negative values (no smaller than -1.5) to contract
 //      the space between characters.
 //
 //      E.g. spacing = 1 adds one "pixel" of spacing between the
 //      characters. spacing = -1 is reasonable but feels a bit too
 //      compact to me; -0.5 is a reasonable compromise as long as
 //      you're scaling the font up.
 //
 // LICENSE
 //
 //   See end of file for license information.
 //
 // VERSION HISTORY
 //
 //   (2020-02-02)  1.1   make everything static so can compile it in more than one src file
 //   (2017-01-15)  1.0   space character takes same space as numbers; fix bad spacing of 'f'
 //   (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
 //
 // CONTRIBUTORS
 //
 //   github:vassvik    --  bug report
 //   github:podsvirov  --  fix multiple definition errors

 #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
   int num_quads;

   num_quads = stb_easy_font_print(x, y, text, NULL, buffer, sizeof(buffer));

   glColor3f(r,g,b);
   glEnableClientState(GL_VERTEX_ARRAY);
   glVertexPointer(2, GL_FLOAT, 16, buffer);
   glDrawArrays(GL_QUADS, 0, num_quads*4);
   glDisableClientState(GL_VERTEX_ARRAY);
 }
 #endif

 #ifndef INCLUDE_STB_EASY_FONT_H
 #define INCLUDE_STB_EASY_FONT_H

 #include <stdlib.h>
 #include <math.h>

 static struct stb_easy_font_info_struct {
     unsigned char advance;
     unsigned char h_seg;
     unsigned char v_seg;
 } stb_easy_font_charinfo[96] = {
     {  6,  0,  0 },  {  3,  0,  0 },  {  5,  1,  1 },  {  7,  1,  4 },
     {  7,  3,  7 },  {  7,  6, 12 },  {  7,  8, 19 },  {  4, 16, 21 },
     {  4, 17, 22 },  {  4, 19, 23 },  { 23, 21, 24 },  { 23, 22, 31 },
     { 20, 23, 34 },  { 22, 23, 36 },  { 19, 24, 36 },  { 21, 25, 36 },
     {  6, 25, 39 },  {  6, 27, 43 },  {  6, 28, 45 },  {  6, 30, 49 },
     {  6, 33, 53 },  {  6, 34, 57 },  {  6, 40, 58 },  {  6, 46, 59 },
     {  6, 47, 62 },  {  6, 55, 64 },  { 19, 57, 68 },  { 20, 59, 68 },
     { 21, 61, 69 },  { 22, 66, 69 },  { 21, 68, 69 },  {  7, 73, 69 },
     {  9, 75, 74 },  {  6, 78, 81 },  {  6, 80, 85 },  {  6, 83, 90 },
     {  6, 85, 91 },  {  6, 87, 95 },  {  6, 90, 96 },  {  7, 92, 97 },
     {  6, 96,102 },  {  5, 97,106 },  {  6, 99,107 },  {  6,100,110 },
     {  6,100,115 },  {  7,101,116 },  {  6,101,121 },  {  6,101,125 },
     {  6,102,129 },  {  7,103,133 },  {  6,104,140 },  {  6,105,145 },
     {  7,107,149 },  {  6,108,151 },  {  7,109,155 },  {  7,109,160 },
     {  7,109,165 },  {  7,118,167 },  {  6,118,172 },  {  4,120,176 },
     {  6,122,177 },  {  4,122,181 },  { 23,124,182 },  { 22,129,182 },
     {  4,130,182 },  { 22,131,183 },  {  6,133,187 },  { 22,135,191 },
     {  6,137,192 },  { 22,139,196 },  {  6,144,197 },  { 22,147,198 },
     {  6,150,202 },  { 19,151,206 },  { 21,152,207 },  {  6,155,209 },
     {  3,160,210 },  { 23,160,211 },  { 22,164,216 },  { 22,165,220 },
     { 22,167,224 },  { 22,169,228 },  { 21,171,232 },  { 21,173,233 },
     {  5,178,233 },  { 22,179,234 },  { 23,180,238 },  { 23,180,243 },
     { 23,180,248 },  { 22,189,248 },  { 22,191,252 },  {  5,196,252 },
     {  3,203,252 },  {  5,203,253 },  { 22,210,253 },  {  0,214,253 },
 };

 static unsigned char stb_easy_font_hseg[214] = {
    97,37,69,84,28,51,2,18,10,49,98,41,65,25,81,105,33,9,97,1,97,37,37,36,
     81,10,98,107,3,100,3,99,58,51,4,99,58,8,73,81,10,50,98,8,73,81,4,10,50,
     98,8,25,33,65,81,10,50,17,65,97,25,33,25,49,9,65,20,68,1,65,25,49,41,
     11,105,13,101,76,10,50,10,50,98,11,99,10,98,11,50,99,11,50,11,99,8,57,
     58,3,99,99,107,10,10,11,10,99,11,5,100,41,65,57,41,65,9,17,81,97,3,107,
     9,97,1,97,33,25,9,25,41,100,41,26,82,42,98,27,83,42,98,26,51,82,8,41,
     35,8,10,26,82,114,42,1,114,8,9,73,57,81,41,97,18,8,8,25,26,26,82,26,82,
     26,82,41,25,33,82,26,49,73,35,90,17,81,41,65,57,41,65,25,81,90,114,20,
     84,73,57,41,49,25,33,65,81,9,97,1,97,25,33,65,81,57,33,25,41,25,
 };

 static unsigned char stb_easy_font_vseg[253] = {
    4,2,8,10,15,8,15,33,8,15,8,73,82,73,57,41,82,10,82,18,66,10,21,29,1,65,
     27,8,27,9,65,8,10,50,97,74,66,42,10,21,57,41,29,25,14,81,73,57,26,8,8,
     26,66,3,8,8,15,19,21,90,58,26,18,66,18,105,89,28,74,17,8,73,57,26,21,
     8,42,41,42,8,28,22,8,8,30,7,8,8,26,66,21,7,8,8,29,7,7,21,8,8,8,59,7,8,
     8,15,29,8,8,14,7,57,43,10,82,7,7,25,42,25,15,7,25,41,15,21,105,105,29,
     7,57,57,26,21,105,73,97,89,28,97,7,57,58,26,82,18,57,57,74,8,30,6,8,8,
     14,3,58,90,58,11,7,74,43,74,15,2,82,2,42,75,42,10,67,57,41,10,7,2,42,
     74,106,15,2,35,8,8,29,7,8,8,59,35,51,8,8,15,35,30,35,8,8,30,7,8,8,60,
     36,8,45,7,7,36,8,43,8,44,21,8,8,44,35,8,8,43,23,8,8,43,35,8,8,31,21,15,
     20,8,8,28,18,58,89,58,26,21,89,73,89,29,20,8,8,30,7,
 };

 typedef struct
 {
    unsigned char c[4];
 } stb_easy_font_color;

 static int stb_easy_font_draw_segs(float x, float y, unsigned char *segs, int num_segs, int vertical, stb_easy_font_color c, char *vbuf, int vbuf_size, int offset)
 {
     int i,j;
     for (i=0; i < num_segs; ++i) {
         int len = segs[i] & 7;
         x += (float) ((segs[i] >> 3) & 1);
         if (len && offset+64 <= vbuf_size) {
             float y0 = y + (float) (segs[i]>>4);
             for (j=0; j < 4; ++j) {
                 * (float *) (vbuf+offset+0) = x  + (j==1 || j==2 ? (vertical ? 1 : len) : 0);
                 * (float *) (vbuf+offset+4) = y0 + (    j >= 2   ? (vertical ? len : 1) : 0);
                 * (float *) (vbuf+offset+8) = 0.f;
                 * (stb_easy_font_color *) (vbuf+offset+12) = c;
                 offset += 16;
             }
         }
     }
     return offset;
 }

 static float stb_easy_font_spacing_val = 0;
 static void stb_easy_font_spacing(float spacing)
 {
    stb_easy_font_spacing_val = spacing;
 }

 static int stb_easy_font_print(float x, float y, char *text, unsigned char color[4], void *vertex_buffer, int vbuf_size)
 {
     char *vbuf = (char *) vertex_buffer;
     float start_x = x;
     int offset = 0;

     stb_easy_font_color c = { 255,255,255,255 }; // use structure copying to avoid needing depending on memcpy()
     if (color) { c.c[0] = color[0]; c.c[1] = color[1]; c.c[2] = color[2]; c.c[3] = color[3]; }

     while (*text && offset < vbuf_size) {
         if (*text == '\n') {
             y += 12;
             x = start_x;
         } else {
             unsigned char advance = stb_easy_font_charinfo[*text-32].advance;
             float y_ch = advance & 16 ? y+1 : y;
             int h_seg, v_seg, num_h, num_v;
             h_seg = stb_easy_font_charinfo[*text-32  ].h_seg;
             v_seg = stb_easy_font_charinfo[*text-32  ].v_seg;
             num_h = stb_easy_font_charinfo[*text-32+1].h_seg - h_seg;
             num_v = stb_easy_font_charinfo[*text-32+1].v_seg - v_seg;
             offset = stb_easy_font_draw_segs(x, y_ch, &stb_easy_font_hseg[h_seg], num_h, 0, c, vbuf, vbuf_size, offset);
             offset = stb_easy_font_draw_segs(x, y_ch, &stb_easy_font_vseg[v_seg], num_v, 1, c, vbuf, vbuf_size, offset);
             x += advance & 15;
             x += stb_easy_font_spacing_val;
         }
         ++text;
     }
     return (unsigned) offset/64;
 }

 static int stb_easy_font_width(char *text)
 {
     float len = 0;
     float max_len = 0;
     while (*text) {
         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;
     }
     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

 /*
 ------------------------------------------------------------------------------
 This software is available under 2 licenses -- choose whichever you prefer.
 ------------------------------------------------------------------------------
 ALTERNATIVE A - MIT License
 Copyright (c) 2017 Sean Barrett
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 of the Software, and to permit persons to whom the Software is furnished to do
 so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 ------------------------------------------------------------------------------
 ALTERNATIVE B - Public Domain (www.unlicense.org)
 This is free and unencumbered software released into the public domain.
 Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
 software, either in source code form or as a compiled binary, for any purpose,
 commercial or non-commercial, and by any means.
 In jurisdictions that recognize copyright laws, the author or authors of this
 software dedicate any and all copyright interest in the software to the public
 domain. We make this dedication for the benefit of the public at large and to
 the detriment of our heirs and successors. We intend this dedication to be an
 overt act of relinquishment in perpetuity of all present and future rights to
 this software under copyright law.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ------------------------------------------------------------------------------
 */
	// stb_easy_font.h - v1.1 - bitmap font for 3D rendering - public domain
	// Sean Barrett, Feb 2015
	//
	// Easy-to-deploy,
	// reasonably compact,
	// extremely inefficient performance-wise,
	// crappy-looking,
	// ASCII-only,
	// bitmap font for use in 3D APIs.
	//
	// Intended for when you just want to get some text displaying
	// in a 3D app as quickly as possible.
	//
	// Doesn't use any textures, instead builds characters out of quads.
	//
	// DOCUMENTATION:
	//
	// int stb_easy_font_width(char *text)
	// int stb_easy_font_height(char *text)
	//
	// 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],
	// void *vertex_buffer, int vbuf_size)
	//
	// Takes a string (which can contain '\n') and fills out a
	// vertex buffer with renderable data to draw the string.
	// Output data assumes increasing x is rightwards, increasing y
	// is downwards.
	//
	// The vertex data is divided into quads, i.e. there are four
	// vertices in the vertex buffer for each quad.
	//
	// The vertices are stored in an interleaved format:
	//
	// x:float
	// y:float
	// z:float
	// color:uint8[4]
	//
	// 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 vertex-buffer-drawing code.
	//
	// If you pass in NULL for color, it becomes 255,255,255,255.
	//
	// Returns the number of quads.
	//
	// If the buffer isn't large enough, it will truncate.
	// Expect it to use an average of ~270 bytes per character.
	//
	// If your API doesn't draw quads, build a reusable index
	// list that allows you to render quads as indexed triangles.
	//
	// void stb_easy_font_spacing(float spacing)
	//
	// Use positive values to expand the space between characters,
	// and small negative values (no smaller than -1.5) to contract
	// the space between characters.
	//
	// E.g. spacing = 1 adds one "pixel" of spacing between the
	// characters. spacing = -1 is reasonable but feels a bit too
	// compact to me; -0.5 is a reasonable compromise as long as
	// you're scaling the font up.
	//
	// LICENSE
	//
	// See end of file for license information.
	//
	// VERSION HISTORY
	//
	// (2020-02-02) 1.1 make everything static so can compile it in more than one src file
	// (2017-01-15) 1.0 space character takes same space as numbers; fix bad spacing of 'f'
	// (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
	//
	// CONTRIBUTORS
	//
	// github:vassvik -- bug report
	// github:podsvirov -- fix multiple definition errors

	#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
	int num_quads;

	num_quads = stb_easy_font_print(x, y, text, NULL, buffer, sizeof(buffer));

	glColor3f(r,g,b);
	glEnableClientState(GL_VERTEX_ARRAY);
	glVertexPointer(2, GL_FLOAT, 16, buffer);
	glDrawArrays(GL_QUADS, 0, num_quads*4);
	glDisableClientState(GL_VERTEX_ARRAY);
	}
	#endif

	#ifndef INCLUDE_STB_EASY_FONT_H
	#define INCLUDE_STB_EASY_FONT_H

	#include <stdlib.h>
	#include <math.h>

	static struct stb_easy_font_info_struct {
	unsigned char advance;
	unsigned char h_seg;
	unsigned char v_seg;
	} stb_easy_font_charinfo[96] = {
	{ 6, 0, 0 }, { 3, 0, 0 }, { 5, 1, 1 }, { 7, 1, 4 },
	{ 7, 3, 7 }, { 7, 6, 12 }, { 7, 8, 19 }, { 4, 16, 21 },
	{ 4, 17, 22 }, { 4, 19, 23 }, { 23, 21, 24 }, { 23, 22, 31 },
	{ 20, 23, 34 }, { 22, 23, 36 }, { 19, 24, 36 }, { 21, 25, 36 },
	{ 6, 25, 39 }, { 6, 27, 43 }, { 6, 28, 45 }, { 6, 30, 49 },
	{ 6, 33, 53 }, { 6, 34, 57 }, { 6, 40, 58 }, { 6, 46, 59 },
	{ 6, 47, 62 }, { 6, 55, 64 }, { 19, 57, 68 }, { 20, 59, 68 },
	{ 21, 61, 69 }, { 22, 66, 69 }, { 21, 68, 69 }, { 7, 73, 69 },
	{ 9, 75, 74 }, { 6, 78, 81 }, { 6, 80, 85 }, { 6, 83, 90 },
	{ 6, 85, 91 }, { 6, 87, 95 }, { 6, 90, 96 }, { 7, 92, 97 },
	{ 6, 96,102 }, { 5, 97,106 }, { 6, 99,107 }, { 6,100,110 },
	{ 6,100,115 }, { 7,101,116 }, { 6,101,121 }, { 6,101,125 },
	{ 6,102,129 }, { 7,103,133 }, { 6,104,140 }, { 6,105,145 },
	{ 7,107,149 }, { 6,108,151 }, { 7,109,155 }, { 7,109,160 },
	{ 7,109,165 }, { 7,118,167 }, { 6,118,172 }, { 4,120,176 },
	{ 6,122,177 }, { 4,122,181 }, { 23,124,182 }, { 22,129,182 },
	{ 4,130,182 }, { 22,131,183 }, { 6,133,187 }, { 22,135,191 },
	{ 6,137,192 }, { 22,139,196 }, { 6,144,197 }, { 22,147,198 },
	{ 6,150,202 }, { 19,151,206 }, { 21,152,207 }, { 6,155,209 },
	{ 3,160,210 }, { 23,160,211 }, { 22,164,216 }, { 22,165,220 },
	{ 22,167,224 }, { 22,169,228 }, { 21,171,232 }, { 21,173,233 },
	{ 5,178,233 }, { 22,179,234 }, { 23,180,238 }, { 23,180,243 },
	{ 23,180,248 }, { 22,189,248 }, { 22,191,252 }, { 5,196,252 },
	{ 3,203,252 }, { 5,203,253 }, { 22,210,253 }, { 0,214,253 },
	};

	static unsigned char stb_easy_font_hseg[214] = {
	97,37,69,84,28,51,2,18,10,49,98,41,65,25,81,105,33,9,97,1,97,37,37,36,
	81,10,98,107,3,100,3,99,58,51,4,99,58,8,73,81,10,50,98,8,73,81,4,10,50,
	98,8,25,33,65,81,10,50,17,65,97,25,33,25,49,9,65,20,68,1,65,25,49,41,
	11,105,13,101,76,10,50,10,50,98,11,99,10,98,11,50,99,11,50,11,99,8,57,
	58,3,99,99,107,10,10,11,10,99,11,5,100,41,65,57,41,65,9,17,81,97,3,107,
	9,97,1,97,33,25,9,25,41,100,41,26,82,42,98,27,83,42,98,26,51,82,8,41,
	35,8,10,26,82,114,42,1,114,8,9,73,57,81,41,97,18,8,8,25,26,26,82,26,82,
	26,82,41,25,33,82,26,49,73,35,90,17,81,41,65,57,41,65,25,81,90,114,20,
	84,73,57,41,49,25,33,65,81,9,97,1,97,25,33,65,81,57,33,25,41,25,
	};

	static unsigned char stb_easy_font_vseg[253] = {
	4,2,8,10,15,8,15,33,8,15,8,73,82,73,57,41,82,10,82,18,66,10,21,29,1,65,
	27,8,27,9,65,8,10,50,97,74,66,42,10,21,57,41,29,25,14,81,73,57,26,8,8,
	26,66,3,8,8,15,19,21,90,58,26,18,66,18,105,89,28,74,17,8,73,57,26,21,
	8,42,41,42,8,28,22,8,8,30,7,8,8,26,66,21,7,8,8,29,7,7,21,8,8,8,59,7,8,
	8,15,29,8,8,14,7,57,43,10,82,7,7,25,42,25,15,7,25,41,15,21,105,105,29,
	7,57,57,26,21,105,73,97,89,28,97,7,57,58,26,82,18,57,57,74,8,30,6,8,8,
	14,3,58,90,58,11,7,74,43,74,15,2,82,2,42,75,42,10,67,57,41,10,7,2,42,
	74,106,15,2,35,8,8,29,7,8,8,59,35,51,8,8,15,35,30,35,8,8,30,7,8,8,60,
	36,8,45,7,7,36,8,43,8,44,21,8,8,44,35,8,8,43,23,8,8,43,35,8,8,31,21,15,
	20,8,8,28,18,58,89,58,26,21,89,73,89,29,20,8,8,30,7,
	};

	typedef struct
	{
	unsigned char c[4];
	} stb_easy_font_color;

	static int stb_easy_font_draw_segs(float x, float y, unsigned char segs, int num_segs, int vertical, stb_easy_font_color c, char vbuf, int vbuf_size, int offset)
	{
	int i,j;
	for (i=0; i < num_segs; ++i) {
	int len = segs[i] & 7;
	x += (float) ((segs[i] >> 3) & 1);
	if (len && offset+64 <= vbuf_size) {
	float y0 = y + (float) (segs[i]>>4);
	for (j=0; j < 4; ++j) {
	* (float *) (vbuf+offset+0) = x + (j==1 \|\| j==2 ? (vertical ? 1 : len) : 0);
	* (float *) (vbuf+offset+4) = y0 + ( j >= 2 ? (vertical ? len : 1) : 0);
	* (float *) (vbuf+offset+8) = 0.f;
	* (stb_easy_font_color *) (vbuf+offset+12) = c;
	offset += 16;
	}
	}
	}
	return offset;
	}

	static float stb_easy_font_spacing_val = 0;
	static void stb_easy_font_spacing(float spacing)
	{
	stb_easy_font_spacing_val = spacing;
	}

	static int stb_easy_font_print(float x, float y, char text, unsigned char color[4], void vertex_buffer, int vbuf_size)
	{
	char vbuf = (char ) vertex_buffer;
	float start_x = x;
	int offset = 0;

	stb_easy_font_color c = { 255,255,255,255 }; // use structure copying to avoid needing depending on memcpy()
	if (color) { c.c[0] = color[0]; c.c[1] = color[1]; c.c[2] = color[2]; c.c[3] = color[3]; }

	while (*text && offset < vbuf_size) {
	if (*text == '\n') {
	y += 12;
	x = start_x;
	} else {
	unsigned char advance = stb_easy_font_charinfo[*text-32].advance;
	float y_ch = advance & 16 ? y+1 : y;
	int h_seg, v_seg, num_h, num_v;
	h_seg = stb_easy_font_charinfo[*text-32 ].h_seg;
	v_seg = stb_easy_font_charinfo[*text-32 ].v_seg;
	num_h = stb_easy_font_charinfo[*text-32+1].h_seg - h_seg;
	num_v = stb_easy_font_charinfo[*text-32+1].v_seg - v_seg;
	offset = stb_easy_font_draw_segs(x, y_ch, &stb_easy_font_hseg[h_seg], num_h, 0, c, vbuf, vbuf_size, offset);
	offset = stb_easy_font_draw_segs(x, y_ch, &stb_easy_font_vseg[v_seg], num_v, 1, c, vbuf, vbuf_size, offset);
	x += advance & 15;
	x += stb_easy_font_spacing_val;
	}
	++text;
	}
	return (unsigned) offset/64;
	}

	static int stb_easy_font_width(char *text)
	{
	float len = 0;
	float max_len = 0;
	while (*text) {
	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;
	}
	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

	/*
	------------------------------------------------------------------------------
	This software is available under 2 licenses -- choose whichever you prefer.
	------------------------------------------------------------------------------
	ALTERNATIVE A - MIT License
	Copyright (c) 2017 Sean Barrett
	Permission is hereby granted, free of charge, to any person obtaining a copy of
	this software and associated documentation files (the "Software"), to deal in
	the Software without restriction, including without limitation the rights to
	use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
	of the Software, and to permit persons to whom the Software is furnished to do
	so, subject to the following conditions:
	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.
	------------------------------------------------------------------------------
	ALTERNATIVE B - Public Domain (www.unlicense.org)
	This is free and unencumbered software released into the public domain.
	Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
	software, either in source code form or as a compiled binary, for any purpose,
	commercial or non-commercial, and by any means.
	In jurisdictions that recognize copyright laws, the author or authors of this
	software dedicate any and all copyright interest in the software to the public
	domain. We make this dedication for the benefit of the public at large and to
	the detriment of our heirs and successors. We intend this dedication to be an
	overt act of relinquishment in perpetuity of all present and future rights to
	this software under copyright law.
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	------------------------------------------------------------------------------
	*/