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// stb_truetype.h - v1.02 - public domain

// authored from 2009-2014 by Sean Barrett / RAD Game Tools

//

//   This library processes TrueType files:

//        parse files

//        extract glyph metrics

//        extract glyph shapes

//        render glyphs to one-channel bitmaps with antialiasing (box filter)

//

//   Todo:

//        non-MS cmaps

//        crashproof on bad data

//        hinting? (no longer patented)

//        cleartype-style AA?

//        optimize: use simple memory allocator for intermediates

//        optimize: build edge-list directly from curves

//        optimize: rasterize directly from curves?

//

// ADDITIONAL CONTRIBUTORS

//

//   Mikko Mononen: compound shape support, more cmap formats

//   Tor Andersson: kerning, subpixel rendering

//

//   Bug/warning reports/fixes:

//       "Zer" on mollyrocket (with fix)

//       Cass Everitt

//       stoiko (Haemimont Games)

//       Brian Hook

//       Walter van Niftrik

//       David Gow

//       David Given

//       Ivan-Assen Ivanov

//       Anthony Pesch

//       Johan Duparc

//       Hou Qiming

//       Fabian "ryg" Giesen

//

//   Misc other:

//       Ryan Gordon

//

// VERSION HISTORY

//

//   1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++

//   1.01 (2014-12-08) fix subpixel position when oversampling to exactly match

//                        non-oversampled; STBTT_POINT_SIZE for packed case only

//   1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling

//   0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg)

//   0.9  (2014-08-07) support certain mac/iOS fonts without an MS platformID

//   0.8b (2014-07-07) fix a warning

//   0.8  (2014-05-25) fix a few more warnings

//   0.7  (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back

//   0.6c (2012-07-24) improve documentation

//   0.6b (2012-07-20) fix a few more warnings

//   0.6  (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels,

//                        stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty

//   0.5  (2011-12-09) bugfixes:

//                        subpixel glyph renderer computed wrong bounding box

//                        first vertex of shape can be off-curve (FreeSans)

//   0.4b (2011-12-03) fixed an error in the font baking example

//   0.4  (2011-12-01) kerning, subpixel rendering (tor)

//                    bugfixes for:

//                        codepoint-to-glyph conversion using table fmt=12

//                        codepoint-to-glyph conversion using table fmt=4

//                        stbtt_GetBakedQuad with non-square texture (Zer)

//                    updated Hello World! sample to use kerning and subpixel

//                    fixed some warnings

//   0.3  (2009-06-24) cmap fmt=12, compound shapes (MM)

//                    userdata, malloc-from-userdata, non-zero fill (stb)

//   0.2  (2009-03-11) Fix unsigned/signed char warnings

//   0.1  (2009-03-09) First public release

//

// LICENSE

//

//   This software is in the public domain. Where that dedication is not

//   recognized, you are granted a perpetual, irrevokable license to copy

//   and modify this file as you see fit.

//

// USAGE

//

//   Include this file in whatever places neeed to refer to it. In ONE C/C++

//   file, write:

//      #define STB_TRUETYPE_IMPLEMENTATION

//   before the #include of this file. This expands out the actual

//   implementation into that C/C++ file.

//

//   Simple 3D API (don't ship this, but it's fine for tools and quick start)

//           stbtt_BakeFontBitmap()               -- bake a font to a bitmap for use as texture

//           stbtt_GetBakedQuad()                 -- compute quad to draw for a given char

//

//   Improved 3D API (more shippable):

//           #include "stb_rect_pack.h"           -- optional, but you really want it

//           stbtt_PackBegin()

//           stbtt_PackSetOversample()            -- for improved quality on small fonts

//           stbtt_PackFontRanges()

//           stbtt_PackEnd()

//           stbtt_GetPackedQuad()

//

//   "Load" a font file from a memory buffer (you have to keep the buffer loaded)

//           stbtt_InitFont()

//           stbtt_GetFontOffsetForIndex()        -- use for TTC font collections

//

//   Render a unicode codepoint to a bitmap

//           stbtt_GetCodepointBitmap()           -- allocates and returns a bitmap

//           stbtt_MakeCodepointBitmap()          -- renders into bitmap you provide

//           stbtt_GetCodepointBitmapBox()        -- how big the bitmap must be

//

//   Character advance/positioning

//           stbtt_GetCodepointHMetrics()

//           stbtt_GetFontVMetrics()

//           stbtt_GetCodepointKernAdvance()

//

// ADDITIONAL DOCUMENTATION

//

//   Immediately after this block comment are a series of sample programs.

//

//   After the sample programs is the "header file" section. This section

//   includes documentation for each API function.

//

//   Some important concepts to understand to use this library:

//

//      Codepoint

//         Characters are defined by unicode codepoints, e.g. 65 is

//         uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is

//         the hiragana for "ma".

//

//      Glyph

//         A visual character shape (every codepoint is rendered as

//         some glyph)

//

//      Glyph index

//         A font-specific integer ID representing a glyph

//

//      Baseline

//         Glyph shapes are defined relative to a baseline, which is the

//         bottom of uppercase characters. Characters extend both above

//         and below the baseline.

//

//      Current Point

//         As you draw text to the screen, you keep track of a "current point"

//         which is the origin of each character. The current point's vertical

//         position is the baseline. Even "baked fonts" use this model.

//

//      Vertical Font Metrics

//         The vertical qualities of the font, used to vertically position

//         and space the characters. See docs for stbtt_GetFontVMetrics.

//

//      Font Size in Pixels or Points

//         The preferred interface for specifying font sizes in stb_truetype

//         is to specify how tall the font's vertical extent should be in pixels.

//         If that sounds good enough, skip the next paragraph.

//

//         Most font APIs instead use "points", which are a common typographic

//         measurement for describing font size, defined as 72 points per inch.

//         stb_truetype provides a point API for compatibility. However, true

//         "per inch" conventions don't make much sense on computer displays

//         since they different monitors have different number of pixels per

//         inch. For example, Windows traditionally uses a convention that

//         there are 96 pixels per inch, thus making 'inch' measurements have

//         nothing to do with inches, and thus effectively defining a point to

//         be 1.333 pixels. Additionally, the TrueType font data provides

//         an explicit scale factor to scale a given font's glyphs to points,

//         but the author has observed that this scale factor is often wrong

//         for non-commercial fonts, thus making fonts scaled in points

//         according to the TrueType spec incoherently sized in practice.

//

// ADVANCED USAGE

//

//   Quality:

//

//    - Use the functions with Subpixel at the end to allow your characters

//      to have subpixel positioning. Since the font is anti-aliased, not

//      hinted, this is very import for quality. (This is not possible with

//      baked fonts.)

//

//    - Kerning is now supported, and if you're supporting subpixel rendering

//      then kerning is worth using to give your text a polished look.

//

//   Performance:

//

//    - Convert Unicode codepoints to glyph indexes and operate on the glyphs;

//      if you don't do this, stb_truetype is forced to do the conversion on

//      every call.

//

//    - There are a lot of memory allocations. We should modify it to take

//      a temp buffer and allocate from the temp buffer (without freeing),

//      should help performance a lot.

//

// NOTES

//

//   The system uses the raw data found in the .ttf file without changing it

//   and without building auxiliary data structures. This is a bit inefficient

//   on little-endian systems (the data is big-endian), but assuming you're

//   caching the bitmaps or glyph shapes this shouldn't be a big deal.

//

//   It appears to be very hard to programmatically determine what font a

//   given file is in a general way. I provide an API for this, but I don't

//   recommend it.

//

//

// SOURCE STATISTICS (based on v0.6c, 2050 LOC)

//

//   Documentation & header file        520 LOC  \___ 660 LOC documentation

//   Sample code                        140 LOC  /

//   Truetype parsing                   620 LOC  ---- 620 LOC TrueType

//   Software rasterization             240 LOC  \                           .

//   Curve tesselation                  120 LOC   \__ 550 LOC Bitmap creation

//   Bitmap management                  100 LOC   /

//   Baked bitmap interface              70 LOC  /

//   Font name matching & access        150 LOC  ---- 150

//   C runtime library abstraction       60 LOC  ----  60

//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////

////

////  SAMPLE PROGRAMS

////

//

//  Incomplete text-in-3d-api example, which draws quads properly aligned to be lossless

//

#if 0

#define STB_TRUETYPE_IMPLEMENTATION  // force following include to generate implementation

#include "stb_truetype.h"

char ttf_buffer[1<<20];

unsigned char temp_bitmap[512*512];

stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs

GLstbtt_uint ftex;

void my_stbtt_initfont(void)

{

   fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb"));

   stbtt_BakeFontBitmap(data,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!

   // can free ttf_buffer at this point

   glGenTextures(1, &ftex);

   glBindTexture(GL_TEXTURE_2D, ftex);

   glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 512,512, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap);

   // can free temp_bitmap at this point

   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

}

void my_stbtt_print(float x, float y, char *text)

{

   // assume orthographic projection with units = screen pixels, origin at top left

   glBindTexture(GL_TEXTURE_2D, ftex);

   glBegin(GL_QUADS);

   while (*text) {

      if (*text >= 32 && *text < 128) {

         stbtt_aligned_quad q;

         stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl & d3d10+,0=d3d9

         glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y0);

         glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y0);

         glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y1);

         glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y1);

      }

      ++text;

   }

   glEnd();

}

#endif

//

//

//////////////////////////////////////////////////////////////////////////////

//

// Complete program (this compiles): get a single bitmap, print as ASCII art

//

#if 0

#include 

#define STB_TRUETYPE_IMPLEMENTATION  // force following include to generate implementation

#include "stb_truetype.h"

char ttf_buffer[1<<25];

int main(int argc, char **argv)

{

   stbtt_fontinfo font;

   unsigned char *bitmap;

   int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20);

   fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb"));

   stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0));

   bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0);

   for (j=0; j < h; ++j) {

      for (i=0; i < w; ++i)

         putchar(" .:ioVM@"[bitmap[j*w+i]>>5]);

      putchar('\n');

   }

   return 0;

}

#endif

//

// Output:

//

//     .ii.

//    @@@@@@.

//   V@Mio@@o

//   :i.  V@V

//     :oM@@M

//   :@@@MM@M

//   @@o  o@M

//  :@@.  M@M

//   @@@o@@@@

//   :M@@V:@@.

//

//////////////////////////////////////////////////////////////////////////////

//

// Complete program: print "Hello World!" banner, with bugs

//

#if 0

char buffer[24<<20];

unsigned char screen[20][79];

int main(int arg, char **argv)

{

   stbtt_fontinfo font;

   int i,j,ascent,baseline,ch=0;

   float scale, xpos=2; // leave a little padding in case the character extends left

   char *text = "Heljo World!";

   fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb"));

   stbtt_InitFont(&font, buffer, 0);

   scale = stbtt_ScaleForPixelHeight(&font, 15);

   stbtt_GetFontVMetrics(&font, &ascent,0,0);

   baseline = (int) (ascent*scale);

   while (text[ch]) {

      int advance,lsb,x0,y0,x1,y1;

      float x_shift = xpos - (float) floor(xpos);

      stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb);

      stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1);

      stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]);

      // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong

      // because this API is really for baking character bitmaps into textures. if you want to render

      // a sequence of characters, you really need to render each bitmap to a temp buffer, then

      // "alpha blend" that into the working buffer

      xpos += (advance * scale);

      if (text[ch+1])

         xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]);

      ++ch;

   }

   for (j=0; j < 20; ++j) {

      for (i=0; i < 78; ++i)

         putchar(" .:ioVM@"[screen[j][i]>>5]);

      putchar('\n');

   }

   return 0;

}

#endif

//////////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////

////

////   INTEGRATION WITH YOUR CODEBASE

////

////   The following sections allow you to supply alternate definitions

////   of C library functions used by stb_truetype.

#ifdef STB_TRUETYPE_IMPLEMENTATION

   // #define your own (u)stbtt_int8/16/32 before including to override this

   #ifndef stbtt_uint8

   typedef unsigned char   stbtt_uint8;

   typedef signed   char   stbtt_int8;

   typedef unsigned short  stbtt_uint16;

   typedef signed   short  stbtt_int16;

   typedef unsigned int    stbtt_uint32;

   typedef signed   int    stbtt_int32;

   #endif

   typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];

   typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];

   // #define your own STBTT_sort() to override this to avoid qsort

   #ifndef STBTT_sort

   #include 

   #define STBTT_sort(data,num_items,item_size,compare_func)   qsort(data,num_items,item_size,compare_func)

   #endif

   // #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h

   #ifndef STBTT_ifloor

   #include 

   #define STBTT_ifloor(x)   ((int) floor(x))

   #define STBTT_iceil(x)    ((int) ceil(x))

   #endif

   #ifndef STBTT_sqrt

   #include 

   #define STBTT_sqrt(x)      sqrt(x)

   #endif

   // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h

   #ifndef STBTT_malloc

   #include 

   #define STBTT_malloc(x,u)  ((void)(u),malloc(x))

   #define STBTT_free(x,u)    ((void)(u),free(x))

   #endif

   #ifndef STBTT_assert

   #include 

   #define STBTT_assert(x)    assert(x)

   #endif

   #ifndef STBTT_strlen

   #include 

   #define STBTT_strlen(x)    strlen(x)

   #endif

   #ifndef STBTT_memcpy

   #include 

   #define STBTT_memcpy       memcpy

   #define STBTT_memset       memset

   #endif

#endif

///////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////

////

////   INTERFACE

////

////

#ifndef __STB_INCLUDE_STB_TRUETYPE_H__

#define __STB_INCLUDE_STB_TRUETYPE_H__

#ifdef __cplusplus

extern "C" {

#endif

//////////////////////////////////////////////////////////////////////////////

//

// TEXTURE BAKING API

//

// If you use this API, you only have to call two functions ever.

//

typedef struct

{

   unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap

   float xoff,yoff,xadvance;

} stbtt_bakedchar;

extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)

                                float pixel_height,                     // height of font in pixels

                                unsigned char *pixels, int pw, int ph,  // bitmap to be filled in

                                int first_char, int num_chars,          // characters to bake

                                stbtt_bakedchar *chardata);             // you allocate this, it's num_chars long

// if return is positive, the first unused row of the bitmap

// if return is negative, returns the negative of the number of characters that fit

// if return is 0, no characters fit and no rows were used

// This uses a very crappy packing.

typedef struct

{

   float x0,y0,s0,t0; // top-left

   float x1,y1,s1,t1; // bottom-right

} stbtt_aligned_quad;

extern void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph,  // same data as above

                               int char_index,             // character to display

                               float *xpos, float *ypos,   // pointers to current position in screen pixel space

                               stbtt_aligned_quad *q,      // output: quad to draw

                               int opengl_fillrule);       // true if opengl fill rule; false if DX9 or earlier

// Call GetBakedQuad with char_index = 'character - first_char', and it

// creates the quad you need to draw and advances the current position.

//

// The coordinate system used assumes y increases downwards.

//

// Characters will extend both above and below the current position;

// see discussion of "BASELINE" above.

//

// It's inefficient; you might want to c&p it and optimize it.

//////////////////////////////////////////////////////////////////////////////

//

// NEW TEXTURE BAKING API

//

// This provides options for packing multiple fonts into one atlas, not

// perfectly but better than nothing.

typedef struct

{

   unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap

   float xoff,yoff,xadvance;

   float xoff2,yoff2;

} stbtt_packedchar;

typedef struct stbtt_pack_context stbtt_pack_context;

extern int  stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);

// Initializes a packing context stored in the passed-in stbtt_pack_context.

// Future calls using this context will pack characters into the bitmap passed

// in here: a 1-channel bitmap that is weight x height. stride_in_bytes is

// the distance from one row to the next (or 0 to mean they are packed tightly

// together). "padding" is // the amount of padding to leave between each

// character (normally you want '1' for bitmaps you'll use as textures with

// bilinear filtering).

//

// Returns 0 on failure, 1 on success.

extern void stbtt_PackEnd  (stbtt_pack_context *spc);

// Cleans up the packing context and frees all memory.

#define STBTT_POINT_SIZE(x)   (-(x))

extern int  stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,

                                int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range);

// Creates character bitmaps from the font_index'th font found in fontdata (use

// font_index=0 if you don't know what that is). It creates num_chars_in_range

// bitmaps for characters with unicode values starting at first_unicode_char_in_range

// and increasing. Data for how to render them is stored in chardata_for_range;

// pass these to stbtt_GetPackedQuad to get back renderable quads.

//

// font_size is the full height of the character from ascender to descender,

// as computed by stbtt_ScaleForPixelHeight. To use a point size as computed

// by stbtt_ScaleForMappingEmToPixels, wrap the point size in STBTT_POINT_SIZE()

// and pass that result as 'font_size':

//       ...,                  20 , ... // font max minus min y is 20 pixels tall

//       ..., STBTT_POINT_SIZE(20), ... // 'M' is 20 pixels tall

typedef struct

{

   float font_size;

   int first_unicode_char_in_range;

   int num_chars_in_range;

   stbtt_packedchar *chardata_for_range; // output

} stbtt_pack_range;

extern int  stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);

// Creates character bitmaps from multiple ranges of characters stored in

// ranges. This will usually create a better-packed bitmap than multiple

// calls to stbtt_PackFontRange.

extern void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);

// Oversampling a font increases the quality by allowing higher-quality subpixel

// positioning, and is especially valuable at smaller text sizes.

//

// This function sets the amount of oversampling for all following calls to

// stbtt_PackFontRange(s). The default (no oversampling) is achieved by

// h_oversample=1, v_oversample=1. The total number of pixels required is

// h_oversample*v_oversample larger than the default; for example, 2x2

// oversampling requires 4x the storage of 1x1. For best results, render

// oversampled textures with bilinear filtering. Look at the readme in

// stb/tests/oversample for information about oversampled fonts

extern void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph,  // same data as above

                               int char_index,             // character to display

                               float *xpos, float *ypos,   // pointers to current position in screen pixel space

                               stbtt_aligned_quad *q,      // output: quad to draw

                               int align_to_integer);

// this is an opaque structure that you shouldn't mess with which holds

// all the context needed from PackBegin to PackEnd.

struct stbtt_pack_context {

   void *user_allocator_context;

   void *pack_info;

   int   width;

   int   height;

   int   stride_in_bytes;

   int   padding;

   unsigned int   h_oversample, v_oversample;

   unsigned char *pixels;

   void  *nodes;

};

//////////////////////////////////////////////////////////////////////////////

//

// FONT LOADING

//

//

extern int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);

// Each .ttf/.ttc file may have more than one font. Each font has a sequential

// index number starting from 0. Call this function to get the font offset for

// a given index; it returns -1 if the index is out of range. A regular .ttf

// file will only define one font and it always be at offset 0, so it will

// return '0' for index 0, and -1 for all other indices. You can just skip

// this step if you know it's that kind of font.

// The following structure is defined publically so you can declare one on

// the stack or as a global or etc, but you should treat it as opaque.

typedef struct stbtt_fontinfo

{

   void           * userdata;

   unsigned char  * data;              // pointer to .ttf file

   int              fontstart;         // offset of start of font

   int numGlyphs;                     // number of glyphs, needed for range checking

   int loca,head,glyf,hhea,hmtx,kern; // table locations as offset from start of .ttf

   int index_map;                     // a cmap mapping for our chosen character encoding

   int indexToLocFormat;              // format needed to map from glyph index to glyph

} stbtt_fontinfo;

extern int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);

// Given an offset into the file that defines a font, this function builds

// the necessary cached info for the rest of the system. You must allocate

// the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't

// need to do anything special to free it, because the contents are pure

// value data with no additional data structures. Returns 0 on failure.

//////////////////////////////////////////////////////////////////////////////

//

// CHARACTER TO GLYPH-INDEX CONVERSIOn

int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);

// If you're going to perform multiple operations on the same character

// and you want a speed-up, call this function with the character you're

// going to process, then use glyph-based functions instead of the

// codepoint-based functions.

//////////////////////////////////////////////////////////////////////////////

//

// CHARACTER PROPERTIES

//

extern float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);

// computes a scale factor to produce a font whose "height" is 'pixels' tall.

// Height is measured as the distance from the highest ascender to the lowest

// descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics

// and computing:

//       scale = pixels / (ascent - descent)

// so if you prefer to measure height by the ascent only, use a similar calculation.

extern float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);

// computes a scale factor to produce a font whose EM size is mapped to

// 'pixels' tall. This is probably what traditional APIs compute, but

// I'm not positive.

extern void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);

// ascent is the coordinate above the baseline the font extends; descent

// is the coordinate below the baseline the font extends (i.e. it is typically negative)

// lineGap is the spacing between one row's descent and the next row's ascent...

// so you should advance the vertical position by "*ascent - *descent + *lineGap"

//   these are expressed in unscaled coordinates, so you must multiply by

//   the scale factor for a given size

extern void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);

// the bounding box around all possible characters

extern void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);

// leftSideBearing is the offset from the current horizontal position to the left edge of the character

// advanceWidth is the offset from the current horizontal position to the next horizontal position

//   these are expressed in unscaled coordinates

extern int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);

// an additional amount to add to the 'advance' value between ch1 and ch2

extern int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);

// Gets the bounding box of the visible part of the glyph, in unscaled coordinates

extern void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);

extern int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);

extern int  stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);

// as above, but takes one or more glyph indices for greater efficiency

//////////////////////////////////////////////////////////////////////////////

//

// GLYPH SHAPES (you probably don't need these, but they have to go before

// the bitmaps for C declaration-order reasons)

//

#ifndef STBTT_vmove // you can predefine these to use different values (but why?)

   enum {

      STBTT_vmove=1,

      STBTT_vline,

      STBTT_vcurve

   };

#endif

#ifndef stbtt_vertex // you can predefine this to use different values

                   // (we share this with other code at RAD)

   #define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file

   typedef struct

   {

      stbtt_vertex_type x,y,cx,cy;

      unsigned char type,padding;

   } stbtt_vertex;

#endif

extern int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);

// returns non-zero if nothing is drawn for this glyph

extern int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);

extern int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);

// returns # of vertices and fills *vertices with the pointer to them

//   these are expressed in "unscaled" coordinates

//

// The shape is a series of countours. Each one starts with

// a STBTT_moveto, then consists of a series of mixed

// STBTT_lineto and STBTT_curveto segments. A lineto

// draws a line from previous endpoint to its x,y; a curveto

// draws a quadratic bezier from previous endpoint to

// its x,y, using cx,cy as the bezier control point.

extern void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);

// frees the data allocated above

//////////////////////////////////////////////////////////////////////////////

//

// BITMAP RENDERING

//

extern void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);

// frees the bitmap allocated below

extern unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);

// allocates a large-enough single-channel 8bpp bitmap and renders the

// specified character/glyph at the specified scale into it, with

// antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque).

// *width & *height are filled out with the width & height of the bitmap,

// which is stored left-to-right, top-to-bottom.

//

// xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap

extern unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);

// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel

// shift for the character

extern void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);

// the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap

// in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap

// is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the

// width and height and positioning info for it first.

extern void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint);

// same as stbtt_MakeCodepointBitmap, but you can specify a subpixel

// shift for the character

extern void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);

// get the bbox of the bitmap centered around the glyph origin; so the

// bitmap width is ix1-ix0, height is iy1-iy0, and location to place

// the bitmap top left is (leftSideBearing*scale,iy0).

// (Note that the bitmap uses y-increases-down, but the shape uses

// y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.)

extern void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);

// same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel

// shift for the character

// the following functions are equivalent to the above functions, but operate

// on glyph indices instead of Unicode codepoints (for efficiency)

extern unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);

extern unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff);

extern void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph);

extern void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph);

extern void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);

extern void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);

// @TODO: don't expose this structure

typedef struct

{

   int w,h,stride;

   unsigned char *pixels;

} stbtt__bitmap;

extern void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata);

//////////////////////////////////////////////////////////////////////////////

//

// Finding the right font...

//

// You should really just solve this offline, keep your own tables

// of what font is what, and don't try to get it out of the .ttf file.

// That's because getting it out of the .ttf file is really hard, because

// the names in the file can appear in many possible encodings, in many

// possible languages, and e.g. if you need a case-insensitive comparison,

// the details of that depend on the encoding & language in a complex way

// (actually underspecified in truetype, but also gigantic).

//

// But you can use the provided functions in two possible ways:

//     stbtt_FindMatchingFont() will use *case-sensitive* comparisons on

//             unicode-encoded names to try to find the font you want;

//             you can run this before calling stbtt_InitFont()

//

//     stbtt_GetFontNameString() lets you get any of the various strings

//             from the file yourself and do your own comparisons on them.

//             You have to have called stbtt_InitFont() first.

extern int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);

// returns the offset (not index) of the font that matches, or -1 if none

//   if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold".

//   if you use any other flag, use a font name like "Arial"; this checks

//     the 'macStyle' header field; i don't know if fonts set this consistently

#define STBTT_MACSTYLE_DONTCARE     0

#define STBTT_MACSTYLE_BOLD         1

#define STBTT_MACSTYLE_ITALIC       2

#define STBTT_MACSTYLE_UNDERSCORE   4

#define STBTT_MACSTYLE_NONE         8   // <= not same as 0, this makes us check the bitfield is 0

extern int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);

// returns 1/0 whether the first string interpreted as utf8 is identical to

// the second string interpreted as big-endian utf16... useful for strings from next func

extern const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);

// returns the string (which may be big-endian double byte, e.g. for unicode)

// and puts the length in bytes in *length.

//

// some of the values for the IDs are below; for more see the truetype spec:

//     http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html

//     http://www.microsoft.com/typography/otspec/name.htm

enum { // platformID

   STBTT_PLATFORM_ID_UNICODE   =0,

   STBTT_PLATFORM_ID_MAC       =1,

   STBTT_PLATFORM_ID_ISO       =2,

   STBTT_PLATFORM_ID_MICROSOFT =3

};

enum { // encodingID for STBTT_PLATFORM_ID_UNICODE

   STBTT_UNICODE_EID_UNICODE_1_0    =0,

   STBTT_UNICODE_EID_UNICODE_1_1    =1,

   STBTT_UNICODE_EID_ISO_10646      =2,

   STBTT_UNICODE_EID_UNICODE_2_0_BMP=3,

   STBTT_UNICODE_EID_UNICODE_2_0_FULL=4

};

enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT

   STBTT_MS_EID_SYMBOL        =0,

   STBTT_MS_EID_UNICODE_BMP   =1,

   STBTT_MS_EID_SHIFTJIS      =2,

   STBTT_MS_EID_UNICODE_FULL  =10

};

enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes

   STBTT_MAC_EID_ROMAN        =0,   STBTT_MAC_EID_ARABIC       =4,

   STBTT_MAC_EID_JAPANESE     =1,   STBTT_MAC_EID_HEBREW       =5,

   STBTT_MAC_EID_CHINESE_TRAD =2,   STBTT_MAC_EID_GREEK        =6,

   STBTT_MAC_EID_KOREAN       =3,   STBTT_MAC_EID_RUSSIAN      =7

};

enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID...

       // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs

   STBTT_MS_LANG_ENGLISH     =0x0409,   STBTT_MS_LANG_ITALIAN     =0x0410,

   STBTT_MS_LANG_CHINESE     =0x0804,   STBTT_MS_LANG_JAPANESE    =0x0411,

   STBTT_MS_LANG_DUTCH       =0x0413,   STBTT_MS_LANG_KOREAN      =0x0412,

   STBTT_MS_LANG_FRENCH      =0x040c,   STBTT_MS_LANG_RUSSIAN     =0x0419,

   STBTT_MS_LANG_GERMAN      =0x0407,   STBTT_MS_LANG_SPANISH     =0x0409,

   STBTT_MS_LANG_HEBREW      =0x040d,   STBTT_MS_LANG_SWEDISH     =0x041D

};

enum { // languageID for STBTT_PLATFORM_ID_MAC

   STBTT_MAC_LANG_ENGLISH      =0 ,   STBTT_MAC_LANG_JAPANESE     =11,

   STBTT_MAC_LANG_ARABIC       =12,   STBTT_MAC_LANG_KOREAN       =23,

   STBTT_MAC_LANG_DUTCH        =4 ,   STBTT_MAC_LANG_RUSSIAN      =32,

   STBTT_MAC_LANG_FRENCH       =1 ,   STBTT_MAC_LANG_SPANISH      =6 ,

   STBTT_MAC_LANG_GERMAN       =2 ,   STBTT_MAC_LANG_SWEDISH      =5 ,

   STBTT_MAC_LANG_HEBREW       =10,   STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33,

   STBTT_MAC_LANG_ITALIAN      =3 ,   STBTT_MAC_LANG_CHINESE_TRAD =19

};

#ifdef __cplusplus

}

#endif

#endif // __STB_INCLUDE_STB_TRUETYPE_H__

///////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////

////

////   IMPLEMENTATION

////

////

#ifdef STB_TRUETYPE_IMPLEMENTATION

#ifndef STBTT_MAX_OVERSAMPLE

#define STBTT_MAX_OVERSAMPLE   8

#endif

typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1];

//////////////////////////////////////////////////////////////////////////

//

// accessors to parse data from file

//

// on platforms that don't allow misaligned reads, if we want to allow

// truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE

#define ttBYTE(p)     (* (stbtt_uint8 *) (p))

#define ttCHAR(p)     (* (stbtt_int8 *) (p))

#define ttFixed(p)    ttLONG(p)

#if defined(STB_TRUETYPE_BIGENDIAN) && !defined(ALLOW_UNALIGNED_TRUETYPE)

   #define ttUSHORT(p)   (* (stbtt_uint16 *) (p))

   #define ttSHORT(p)    (* (stbtt_int16 *) (p))

   #define ttULONG(p)    (* (stbtt_uint32 *) (p))

   #define ttLONG(p)     (* (stbtt_int32 *) (p))

#else

   stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }

   stbtt_int16 ttSHORT(const stbtt_uint8 *p)   { return p[0]*256 + p[1]; }

   stbtt_uint32 ttULONG(const stbtt_uint8 *p)  { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }

   stbtt_int32 ttLONG(const stbtt_uint8 *p)    { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }

#endif

#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3))

#define stbtt_tag(p,str)           stbtt_tag4(p,str[0],str[1],str[2],str[3])

static int stbtt__isfont(const stbtt_uint8 *font)

{

   // check the version number

   if (stbtt_tag4(font, '1',0,0,0))  return 1; // TrueType 1

   if (stbtt_tag(font, "typ1"))   return 1; // TrueType with type 1 font -- we don't support this!

   if (stbtt_tag(font, "OTTO"))   return 1; // OpenType with CFF

   if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0

   return 0;

}

// @OPTIMIZE: binary search

static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag)

{

   stbtt_int32 num_tables = ttUSHORT(data+fontstart+4);

   stbtt_uint32 tabledir = fontstart + 12;

   stbtt_int32 i;

   for (i=0; i < num_tables; ++i) {

      stbtt_uint32 loc = tabledir + 16*i;

      if (stbtt_tag(data+loc+0, tag))

         return ttULONG(data+loc+8);

   }

   return 0;

}

int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index)

{

   // if it's just a font, there's only one valid index

   if (stbtt__isfont(font_collection))

      return index == 0 ? 0 : -1;

   // check if it's a TTC

   if (stbtt_tag(font_collection, "ttcf")) {

      // version 1?

      if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {

         stbtt_int32 n = ttLONG(font_collection+8);

         if (index >= n)

            return -1;

         return ttULONG(font_collection+12+index*14);

      }

   }

   return -1;

}

int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart)

{

   stbtt_uint8 *data = (stbtt_uint8 *) data2;

   stbtt_uint32 cmap, t;

   stbtt_int32 i,numTables;

   info->data = data;

   info->fontstart = fontstart;

   cmap = stbtt__find_table(data, fontstart, "cmap");       // required

   info->loca = stbtt__find_table(data, fontstart, "loca"); // required

   info->head = stbtt__find_table(data, fontstart, "head"); // required

   info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required

   info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required

   info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required

   info->kern = stbtt__find_table(data, fontstart, "kern"); // not required

   if (!cmap || !info->loca || !info->head || !info->glyf || !info->hhea || !info->hmtx)

      return 0;

   t = stbtt__find_table(data, fontstart, "maxp");

   if (t)

      info->numGlyphs = ttUSHORT(data+t+4);

   else

      info->numGlyphs = 0xffff;

   // find a cmap encoding table we understand *now* to avoid searching

   // later. (todo: could make this installable)

   // the same regardless of glyph.

   numTables = ttUSHORT(data + cmap + 2);

   info->index_map = 0;

   for (i=0; i < numTables; ++i) {

      stbtt_uint32 encoding_record = cmap + 4 + 8 * i;

      // find an encoding we understand:

      switch(ttUSHORT(data+encoding_record)) {

         case STBTT_PLATFORM_ID_MICROSOFT:

            switch (ttUSHORT(data+encoding_record+2)) {

               case STBTT_MS_EID_UNICODE_BMP:

               case STBTT_MS_EID_UNICODE_FULL:

                  // MS/Unicode

                  info->index_map = cmap + ttULONG(data+encoding_record+4);

                  break;

            }

            break;

        case STBTT_PLATFORM_ID_UNICODE:

            // Mac/iOS has these

            // all the encodingIDs are unicode, so we don't bother to check it

            info->index_map = cmap + ttULONG(data+encoding_record+4);

            break;

      }

   }

   if (info->index_map == 0)

      return 0;

   info->indexToLocFormat = ttUSHORT(data+info->head + 50);

   return 1;

}

int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)

{

   stbtt_uint8 *data = info->data;

   stbtt_uint32 index_map = info->index_map;

   stbtt_uint16 format = ttUSHORT(data + index_map + 0);

   if (format == 0) { // apple byte encoding

      stbtt_int32 bytes = ttUSHORT(data + index_map + 2);

      if (unicode_codepoint < bytes-6)

         return ttBYTE(data + index_map + 6 + unicode_codepoint);

      return 0;

   } else if (format == 6) {

      stbtt_uint32 first = ttUSHORT(data + index_map + 6);

      stbtt_uint32 count = ttUSHORT(data + index_map + 8);

      if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count)

         return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2);

      return 0;

   } else if (format == 2) {

      STBTT_assert(0); // @TODO: high-byte mapping for japanese/chinese/korean

      return 0;

   } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges

      stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1;

      stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1;

      stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10);

      stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1;

      stbtt_uint16 item, offset, start, end;

      // do a binary search of the segments

      stbtt_uint32 endCount = index_map + 14;

      stbtt_uint32 search = endCount;

      if (unicode_codepoint > 0xffff)

         return 0;

      // they lie from endCount .. endCount + segCount

      // but searchRange is the nearest power of two, so...

      if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2))

         search += rangeShift*2;

      // now decrement to bias correctly to find smallest

      search -= 2;

      while (entrySelector) {

         searchRange >>= 1;

         start = ttUSHORT(data + search + searchRange*2 + segcount*2 + 2);

         end = ttUSHORT(data + search + searchRange*2);

         if (unicode_codepoint > end)

            search += searchRange*2;

         --entrySelector;

      }

      search += 2;

      item = (stbtt_uint16) ((search - endCount) >> 1);

      STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));

      start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);

      end = ttUSHORT(data + index_map + 14 + 2 + 2*item);

      if (unicode_codepoint < start)

         return 0;

      offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);

      if (offset == 0)

         return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));

      return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);

   } else if (format == 12 || format == 13) {

      stbtt_uint32 ngroups = ttULONG(data+index_map+12);

      stbtt_int32 low,high;

      low = 0; high = (stbtt_int32)ngroups;

      // Binary search the right group.

      while (low < high) {

         stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high

         stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12);

         stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4);

         if ((stbtt_uint32) unicode_codepoint < start_char)

            high = mid;

         else if ((stbtt_uint32) unicode_codepoint > end_char)

            low = mid+1;

         else {

            stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8);

            if (format == 12)

               return start_glyph + unicode_codepoint-start_char;

            else // format == 13

               return start_glyph;

         }

      }

      return 0; // not found

   }

   // @TODO

   STBTT_assert(0);

   return 0;

}

int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)

{

   return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices);

}

static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy)

{

   v->type = type;

   v->x = (stbtt_int16) x;

   v->y = (stbtt_int16) y;

   v->cx = (stbtt_int16) cx;

   v->cy = (stbtt_int16) cy;

}

static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)

{

   int g1,g2;

   if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range