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php-src/ext/gd/libgd/gdft.c

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/********************************************/
/* gd interface to freetype library */
/* */
/* John Ellson ellson@graphviz.org */
/********************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "gd.h"
#include "gdhelpers.h"
#ifndef MSWIN32
#include <unistd.h>
#else
#include <io.h>
#ifndef R_OK
# define R_OK 04 /* Needed in Windows */
#endif
#endif
#ifdef WIN32
#define access _access
#ifndef R_OK
#define R_OK 2
#endif
#endif
/* number of antialised colors for indexed bitmaps */
/* overwrite Windows GDI define in case of windows build */
#ifdef NUMCOLORS
#undef NUMCOLORS
#endif
#define NUMCOLORS 8
char *
gdImageStringTTF (gdImage * im, int *brect, int fg, char *fontlist,
double ptsize, double angle, int x, int y, char *string)
{
/* 2.0.6: valid return */
return gdImageStringFT (im, brect, fg, fontlist, ptsize, angle, x, y, string);
}
#ifndef HAVE_LIBFREETYPE
char *
gdImageStringFTEx (gdImage * im, int *brect, int fg, char *fontlist,
double ptsize, double angle, int x, int y, char *string,
gdFTStringExtraPtr strex)
{
return "libgd was not built with FreeType font support\n";
}
char *
gdImageStringFT (gdImage * im, int *brect, int fg, char *fontlist,
double ptsize, double angle, int x, int y, char *string)
{
return "libgd was not built with FreeType font support\n";
}
#else
#include "gdcache.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
/* number of fonts cached before least recently used is replaced */
#define FONTCACHESIZE 6
/* number of antialias color lookups cached */
#define TWEENCOLORCACHESIZE 32
/*
* Line separation as a factor of font height.
* No space between if LINESPACE = 1.00
* Line separation will be rounded up to next pixel row.
*/
#define LINESPACE 1.05
/*
* The character (space) used to separate alternate fonts in the
* fontlist parameter to gdImageStringFT. 2.0.18: space was a oor choice for this.
*/
#define LISTSEPARATOR ";"
/*
* DEFAULT_FONTPATH and PATHSEPARATOR are host type dependent and
* are normally set by configure in config.h. These are just
* some last resort values that might match some Un*x system
* if building this version of gd separate from graphviz.
*/
#ifndef DEFAULT_FONTPATH
#if defined(__APPLE__) || (defined(__MWERKS__) && defined(macintosh))
#define DEFAULT_FONTPATH "/usr/share/fonts/truetype:/System/Library/Fonts:/Library/Fonts"
#else
#define DEFAULT_FONTPATH "/usr/share/fonts/truetype"
#endif
#endif
#ifndef PATHSEPARATOR
#define PATHSEPARATOR ":"
#endif
#ifndef TRUE
#define FALSE 0
#define TRUE !FALSE
#endif
#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif
#ifndef MIN
#define MIN(a,b) ((a)<(b)?(a):(b))
#endif
typedef struct
{
char *fontlist; /* key */
FT_Library *library;
FT_Face face;
FT_Bool have_char_map_unicode, have_char_map_big5, have_char_map_sjis, have_char_map_apple_roman;
gdCache_head_t *glyphCache;
} font_t;
typedef struct
{
char *fontlist; /* key */
FT_Library *library;
} fontkey_t;
typedef struct
{
int pixel; /* key */
int bgcolor; /* key */
int fgcolor; /* key *//* -ve means no antialias */
gdImagePtr im; /* key */
int tweencolor;
} tweencolor_t;
typedef struct
{
int pixel; /* key */
int bgcolor; /* key */
int fgcolor; /* key *//* -ve means no antialias */
gdImagePtr im; /* key */
} tweencolorkey_t;
/********************************************************************
* gdTcl_UtfToUniChar is borrowed from Tcl ...
*/
/*
* tclUtf.c --
*
* Routines for manipulating UTF-8 strings.
*
* Copyright (c) 1997-1998 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCS: @(#) tclUtf.c 1.25 98/01/28 18:02:43
*/
/*
*---------------------------------------------------------------------------
*
* gdTcl_UtfToUniChar --
*
* Extract the Tcl_UniChar represented by the UTF-8 string. Bad
* UTF-8 sequences are converted to valid Tcl_UniChars and processing
* continues. Equivalent to Plan 9 chartorune().
*
* The caller must ensure that the source buffer is long enough that
* this routine does not run off the end and dereference non-existent
* memory looking for trail bytes. If the source buffer is known to
* be '\0' terminated, this cannot happen. Otherwise, the caller
* should call Tcl_UtfCharComplete() before calling this routine to
* ensure that enough bytes remain in the string.
*
* Results:
* *chPtr is filled with the Tcl_UniChar, and the return value is the
* number of bytes from the UTF-8 string that were consumed.
*
* Side effects:
* None.
*
*---------------------------------------------------------------------------
*/
#ifdef JISX0208
#include "jisx0208.h"
#endif
extern int any2eucjp (char *, char *, unsigned int);
/* Persistent font cache until explicitly cleared */
/* Fonts can be used across multiple images */
/* 2.0.16: thread safety (the font cache is shared) */
gdMutexDeclare(gdFontCacheMutex);
static gdCache_head_t *fontCache = NULL;
static FT_Library library;
#define Tcl_UniChar int
#define TCL_UTF_MAX 3
static int gdTcl_UtfToUniChar (char *str, Tcl_UniChar * chPtr)
/* str is the UTF8 next character pointer */
/* chPtr is the int for the result */
{
int byte;
/* HTML4.0 entities in decimal form, e.g. &#197; */
byte = *((unsigned char *) str);
if (byte == '&') {
int i, n = 0;
byte = *((unsigned char *) (str + 1));
if (byte == '#') {
byte = *((unsigned char *) (str + 2));
if (byte == 'x' || byte == 'X') {
for (i = 3; i < 8; i++) {
byte = *((unsigned char *) (str + i));
if (byte >= 'A' && byte <= 'F')
byte = byte - 'A' + 10;
else if (byte >= 'a' && byte <= 'f')
byte = byte - 'a' + 10;
else if (byte >= '0' && byte <= '9')
byte = byte - '0';
else
break;
n = (n * 16) + byte;
}
} else {
for (i = 2; i < 8; i++) {
byte = *((unsigned char *) (str + i));
if (byte >= '0' && byte <= '9') {
n = (n * 10) + (byte - '0');
} else {
break;
}
}
}
if (byte == ';') {
*chPtr = (Tcl_UniChar) n;
return ++i;
}
}
}
/* Unroll 1 to 3 byte UTF-8 sequences, use loop to handle longer ones. */
byte = *((unsigned char *) str);
#ifdef JISX0208
if (0xA1 <= byte && byte <= 0xFE) {
int ku, ten;
ku = (byte & 0x7F) - 0x20;
ten = (str[1] & 0x7F) - 0x20;
if ((ku < 1 || ku > 92) || (ten < 1 || ten > 94)) {
*chPtr = (Tcl_UniChar) byte;
return 1;
}
*chPtr = (Tcl_UniChar) UnicodeTbl[ku - 1][ten - 1];
return 2;
} else
#endif /* JISX0208 */
if (byte < 0xC0) {
/* Handles properly formed UTF-8 characters between
* 0x01 and 0x7F. Also treats \0 and naked trail
* bytes 0x80 to 0xBF as valid characters representing
* themselves.
*/
*chPtr = (Tcl_UniChar) byte;
return 1;
} else if (byte < 0xE0) {
if ((str[1] & 0xC0) == 0x80) {
/* Two-byte-character lead-byte followed by a trail-byte. */
*chPtr = (Tcl_UniChar) (((byte & 0x1F) << 6) | (str[1] & 0x3F));
return 2;
}
/*
* A two-byte-character lead-byte not followed by trail-byte
* represents itself.
*/
*chPtr = (Tcl_UniChar) byte;
return 1;
} else if (byte < 0xF0) {
if (((str[1] & 0xC0) == 0x80) && ((str[2] & 0xC0) == 0x80)) {
/* Three-byte-character lead byte followed by two trail bytes. */
*chPtr = (Tcl_UniChar) (((byte & 0x0F) << 12) | ((str[1] & 0x3F) << 6) | (str[2] & 0x3F));
return 3;
}
/* A three-byte-character lead-byte not followed by two trail-bytes represents itself. */
*chPtr = (Tcl_UniChar) byte;
return 1;
}
#if TCL_UTF_MAX > 3
else {
int ch, total, trail;
total = totalBytes[byte];
trail = total - 1;
if (trail > 0) {
ch = byte & (0x3F >> trail);
do {
str++;
if ((*str & 0xC0) != 0x80) {
*chPtr = byte;
return 1;
}
ch <<= 6;
ch |= (*str & 0x3F);
trail--;
} while (trail > 0);
*chPtr = ch;
return total;
}
}
#endif
*chPtr = (Tcl_UniChar) byte;
return 1;
}
/********************************************************************/
/* font cache functions */
static int fontTest (void *element, void *key)
{
font_t *a = (font_t *) element;
fontkey_t *b = (fontkey_t *) key;
return (strcmp (a->fontlist, b->fontlist) == 0);
}
static void *fontFetch (char **error, void *key)
{
font_t *a;
fontkey_t *b = (fontkey_t *) key;
int n;
int font_found = 0;
unsigned short platform, encoding;
char *fontsearchpath, *fontlist;
char fullname[MAXPATHLEN], cur_dir[MAXPATHLEN];
char *name, *path=NULL, *dir;
char *strtok_ptr;
FT_Error err;
FT_CharMap found = 0;
FT_CharMap charmap;
a = (font_t *) gdPMalloc(sizeof(font_t));
a->fontlist = gdPEstrdup(b->fontlist);
a->library = b->library;
/*
* Search the pathlist for any of a list of font names.
*/
fontsearchpath = getenv ("GDFONTPATH");
if (!fontsearchpath) {
fontsearchpath = DEFAULT_FONTPATH;
}
fontlist = gdEstrdup(a->fontlist);
/*
* Must use gd_strtok_r else pointer corrupted by strtok in nested loop.
*/
for (name = gd_strtok_r (fontlist, LISTSEPARATOR, &strtok_ptr); name; name = gd_strtok_r (0, LISTSEPARATOR, &strtok_ptr)) {
/* make a fresh copy each time - strtok corrupts it. */
path = gdEstrdup (fontsearchpath);
/* if name is an absolute filename then test directly */
#ifdef NETWARE
if (*name == '/' || (name[0] != 0 && strstr(name, ":/"))) {
#else
if (*name == '/' || (name[0] != 0 && name[1] == ':' && (name[2] == '/' || name[2] == '\\'))) {
#endif
snprintf(fullname, sizeof(fullname) - 1, "%s", name);
if (access(fullname, R_OK) == 0) {
font_found++;
break;
}
}
for (dir = strtok (path, PATHSEPARATOR); dir; dir = strtok (0, PATHSEPARATOR)) {
if (!strcmp(dir, ".")) {
TSRMLS_FETCH();
#if HAVE_GETCWD
dir = VCWD_GETCWD(cur_dir, MAXPATHLEN);
#elif HAVE_GETWD
dir = VCWD_GETWD(cur_dir);
#endif
if (!dir) {
continue;
}
}
#define GD_CHECK_FONT_PATH(ext) \
snprintf(fullname, sizeof(fullname) - 1, "%s/%s%s", dir, name, ext); \
if (access(fullname, R_OK) == 0) { \
font_found++; \
break; \
} \
GD_CHECK_FONT_PATH("");
GD_CHECK_FONT_PATH(".ttf");
GD_CHECK_FONT_PATH(".pfa");
GD_CHECK_FONT_PATH(".pfb");
GD_CHECK_FONT_PATH(".dfont");
}
gdFree(path);
path = NULL;
if (font_found) {
break;
}
}
if (path) {
gdFree(path);
}
gdFree(fontlist);
if (!font_found) {
gdPFree(a->fontlist);
gdPFree(a);
*error = "Could not find/open font";
return NULL;
}
err = FT_New_Face (*b->library, fullname, 0, &a->face);
if (err) {
gdPFree(a->fontlist);
gdPFree(a);
*error = "Could not read font";
return NULL;
}
/* FIXME - This mapping stuff is imcomplete - where is the spec? */
/* EAM - It's worse than that. It's pointless to match character encodings here.
* As currently written, the stored a->face->charmap only matches one of
* the actual charmaps and we cannot know at this stage if it is the right
* one. We should just skip all this stuff, and check in gdImageStringFTEx
* if some particular charmap is preferred and if so whether it is held in
* one of the a->face->charmaps[0..num_charmaps].
* And why is it so bad not to find any recognized charmap? The user may
* still know what mapping to use, even if we do not. In that case we can
* just use the map in a->face->charmaps[num_charmaps] and be done with it.
*/
a->have_char_map_unicode = 0;
a->have_char_map_big5 = 0;
a->have_char_map_sjis = 0;
a->have_char_map_apple_roman = 0;
for (n = 0; n < a->face->num_charmaps; n++) {
charmap = a->face->charmaps[n];
platform = charmap->platform_id;
encoding = charmap->encoding_id;
/* EAM DEBUG - Newer versions of libfree2 make it easier by defining encodings */
#if (defined(FREETYPE_MAJOR) && ((FREETYPE_MAJOR == 2 && ((FREETYPE_MINOR == 1 && FREETYPE_PATCH >= 3) || FREETYPE_MINOR > 1) || FREETYPE_MAJOR > 2)))
if (charmap->encoding == FT_ENCODING_MS_SYMBOL
|| charmap->encoding == FT_ENCODING_ADOBE_CUSTOM
|| charmap->encoding == FT_ENCODING_ADOBE_STANDARD) {
a->have_char_map_unicode = 1;
found = charmap;
a->face->charmap = charmap;
return (void *)a;
}
#endif /* Freetype 2.1.3 or better */
/* EAM DEBUG */
if ((platform == 3 && encoding == 1) /* Windows Unicode */
|| (platform == 3 && encoding == 0) /* Windows Symbol */
|| (platform == 2 && encoding == 1) /* ISO Unicode */
|| (platform == 0))
{ /* Apple Unicode */
a->have_char_map_unicode = 1;
found = charmap;
} else if (platform == 3 && encoding == 4) { /* Windows Big5 */
a->have_char_map_big5 = 1;
found = charmap;
} else if (platform == 3 && encoding == 2) { /* Windows Sjis */
a->have_char_map_sjis = 1;
found = charmap;
} else if ((platform == 1 && encoding == 0) /* Apple Roman */
|| (platform == 2 && encoding == 0))
{ /* ISO ASCII */
a->have_char_map_apple_roman = 1;
found = charmap;
}
}
if (!found) {
gdPFree(a->fontlist);
gdPFree(a);
*error = "Unable to find a CharMap that I can handle";
return NULL;
}
/* 2.0.5: we should actually return this */
a->face->charmap = found;
return (void *) a;
}
static void fontRelease (void *element)
{
font_t *a = (font_t *) element;
FT_Done_Face (a->face);
gdPFree(a->fontlist);
gdPFree((char *) element);
}
/********************************************************************/
/* tweencolor cache functions */
static int tweenColorTest (void *element, void *key)
{
tweencolor_t *a = (tweencolor_t *) element;
tweencolorkey_t *b = (tweencolorkey_t *) key;
return (a->pixel == b->pixel && a->bgcolor == b->bgcolor && a->fgcolor == b->fgcolor && a->im == b->im);
}
/*
* Computes a color in im's color table that is part way between
* the background and foreground colors proportional to the gray
* pixel value in the range 0-NUMCOLORS. The fg and bg colors must already
* be in the color table for palette images. For truecolor images the
* returned value simply has an alpha component and gdImageAlphaBlend
* does the work so that text can be alpha blended across a complex
* background (TBB; and for real in 2.0.2).
*/
static void * tweenColorFetch (char **error, void *key)
{
tweencolor_t *a;
tweencolorkey_t *b = (tweencolorkey_t *) key;
int pixel, npixel, bg, fg;
gdImagePtr im;
a = (tweencolor_t *) gdMalloc (sizeof (tweencolor_t));
pixel = a->pixel = b->pixel;
bg = a->bgcolor = b->bgcolor;
fg = a->fgcolor = b->fgcolor;
im = a->im = b->im;
/* if fg is specified by a negative color idx, then don't antialias */
if (fg < 0) {
if ((pixel + pixel) >= NUMCOLORS) {
a->tweencolor = -fg;
} else {
a->tweencolor = bg;
}
} else {
npixel = NUMCOLORS - pixel;
if (im->trueColor) {
/* 2.0.1: use gdImageSetPixel to do the alpha blending work,
* or to just store the alpha level. All we have to do here
* is incorporate our knowledge of the percentage of this
* pixel that is really "lit" by pushing the alpha value
* up toward transparency in edge regions.
*/
a->tweencolor = gdTrueColorAlpha(
gdTrueColorGetRed(fg),
gdTrueColorGetGreen(fg),
gdTrueColorGetBlue(fg),
gdAlphaMax - (gdTrueColorGetAlpha (fg) * pixel / NUMCOLORS));
} else {
a->tweencolor = gdImageColorResolve(im,
(pixel * im->red[fg] + npixel * im->red[bg]) / NUMCOLORS,
(pixel * im->green[fg] + npixel * im->green[bg]) / NUMCOLORS,
(pixel * im->blue[fg] + npixel * im->blue[bg]) / NUMCOLORS);
}
}
return (void *) a;
}
static void tweenColorRelease (void *element)
{
gdFree((char *) element);
}
/* draw_bitmap - transfers glyph bitmap to GD image */
static char * gdft_draw_bitmap (gdCache_head_t *tc_cache, gdImage * im, int fg, FT_Bitmap bitmap, int pen_x, int pen_y)
{
unsigned char *pixel = NULL;
int *tpixel = NULL;
int x, y, row, col, pc, pcr;
tweencolor_t *tc_elem;
tweencolorkey_t tc_key;
/* copy to image, mapping colors */
tc_key.fgcolor = fg;
tc_key.im = im;
/* Truecolor version; does not require the cache */
if (im->trueColor) {
for (row = 0; row < bitmap.rows; row++) {
pc = row * bitmap.pitch;
pcr = pc;
y = pen_y + row;
/* clip if out of bounds */
/* 2.0.16: clipping rectangle, not image bounds */
if ((y > im->cy2) || (y < im->cy1)) {
continue;
}
for (col = 0; col < bitmap.width; col++, pc++) {
int level;
if (bitmap.pixel_mode == ft_pixel_mode_grays) {
/* Scale to 128 levels of alpha for gd use.
* alpha 0 is opacity, so be sure to invert at the end
*/
level = (bitmap.buffer[pc] * gdAlphaMax / (bitmap.num_grays - 1));
} else if (bitmap.pixel_mode == ft_pixel_mode_mono) {
/* 2.0.5: mode_mono fix from Giuliano Pochini */
level = ((bitmap.buffer[(col>>3)+pcr]) & (1<<(~col&0x07))) ? gdAlphaTransparent : gdAlphaOpaque;
} else {
return "Unsupported ft_pixel_mode";
}
if ((fg >= 0) && (im->trueColor)) {
/* Consider alpha in the foreground color itself to be an
* upper bound on how opaque things get, when truecolor is
* available. Without truecolor this results in far too many
* color indexes.
*/
level = level * (gdAlphaMax - gdTrueColorGetAlpha(fg)) / gdAlphaMax;
}
level = gdAlphaMax - level;
x = pen_x + col;
/* clip if out of bounds */
/* 2.0.16: clip to clipping rectangle, Matt McNabb */
if ((x > im->cx2) || (x < im->cx1)) {
continue;
}
/* get pixel location in gd buffer */
tpixel = &im->tpixels[y][x];
if (fg < 0) {
if (level < (gdAlphaMax / 2)) {
*tpixel = -fg;
}
} else {
if (im->alphaBlendingFlag) {
*tpixel = gdAlphaBlend(*tpixel, (level << 24) + (fg & 0xFFFFFF));
} else {
*tpixel = (level << 24) + (fg & 0xFFFFFF);
}
}
}
}
return (char *) NULL;
}
/* Non-truecolor case, restored to its more or less original form */
for (row = 0; row < bitmap.rows; row++) {
int pcr;
pc = row * bitmap.pitch;
pcr = pc;
if (bitmap.pixel_mode==ft_pixel_mode_mono) {
pc *= 8; /* pc is measured in bits for monochrome images */
}
y = pen_y + row;
/* clip if out of bounds */
if (y >= im->sy || y < 0) {
continue;
}
for (col = 0; col < bitmap.width; col++, pc++) {
if (bitmap.pixel_mode == ft_pixel_mode_grays) {
/*
* Round to NUMCOLORS levels of antialiasing for
* index color images since only 256 colors are
* available.
*/
tc_key.pixel = ((bitmap.buffer[pc] * NUMCOLORS) + bitmap.num_grays / 2) / (bitmap.num_grays - 1);
} else if (bitmap.pixel_mode == ft_pixel_mode_mono) {
tc_key.pixel = ((bitmap.buffer[pc / 8] << (pc % 8)) & 128) ? NUMCOLORS : 0;
/* 2.0.5: mode_mono fix from Giuliano Pochini */
tc_key.pixel = ((bitmap.buffer[(col>>3)+pcr]) & (1<<(~col&0x07))) ? NUMCOLORS : 0;
} else {
return "Unsupported ft_pixel_mode";
}
if (tc_key.pixel > 0) { /* if not background */
x = pen_x + col;
/* clip if out of bounds */
if (x >= im->sx || x < 0) {
continue;
}
/* get pixel location in gd buffer */
pixel = &im->pixels[y][x];
if (tc_key.pixel == NUMCOLORS) {
/* use fg color directly. gd 2.0.2: watch out for
* negative indexes (thanks to David Marwood).
*/
*pixel = (fg < 0) ? -fg : fg;
} else {
/* find antialised color */
tc_key.bgcolor = *pixel;
tc_elem = (tweencolor_t *) gdCacheGet(tc_cache, &tc_key);
*pixel = tc_elem->tweencolor;
}
}
}
}
return (char *) NULL;
}
static int
gdroundupdown (FT_F26Dot6 v1, int updown)
{
return (!updown) ? (v1 < 0 ? ((v1 - 63) >> 6) : v1 >> 6) : (v1 > 0 ? ((v1 + 63) >> 6) : v1 >> 6);
}
void gdFontCacheShutdown()
{
gdMutexLock(gdFontCacheMutex);
if (fontCache) {
gdCacheDelete(fontCache);
fontCache = NULL;
FT_Done_FreeType(library);
}
gdMutexUnlock(gdFontCacheMutex);
}
void gdFreeFontCache()
{
gdFontCacheShutdown();
}
void gdFontCacheMutexSetup()
{
gdMutexSetup(gdFontCacheMutex);
}
void gdFontCacheMutexShutdown()
{
gdMutexShutdown(gdFontCacheMutex);
}
int gdFontCacheSetup(void)
{
if (fontCache) {
/* Already set up */
return 0;
}
if (FT_Init_FreeType(&library)) {
return -1;
}
fontCache = gdCacheCreate (FONTCACHESIZE, fontTest, fontFetch, fontRelease);
return 0;
}
/********************************************************************/
/* gdImageStringFT - render a utf8 string onto a gd image */
char *
gdImageStringFT (gdImage * im, int *brect, int fg, char *fontlist,
double ptsize, double angle, int x, int y, char *string)
{
return gdImageStringFTEx(im, brect, fg, fontlist, ptsize, angle, x, y, string, 0);
}
char *
gdImageStringFTEx (gdImage * im, int *brect, int fg, char *fontlist, double ptsize, double angle, int x, int y, char *string, gdFTStringExtraPtr strex)
{
FT_BBox bbox, glyph_bbox;
FT_Matrix matrix;
FT_Vector pen, delta, penf;
FT_Face face;
FT_Glyph image;
FT_GlyphSlot slot;
FT_Bool use_kerning;
FT_UInt glyph_index, previous;
double sin_a = sin (angle);
double cos_a = cos (angle);
int len, i = 0, ch;
int x1 = 0, y1 = 0;
int xb = x, yb = y;
int yd = 0;
font_t *font;
fontkey_t fontkey;
char *next;
char *tmpstr = NULL;
int render = (im && (im->trueColor || (fg <= 255 && fg >= -255)));
FT_BitmapGlyph bm;
/* 2.0.13: Bob Ostermann: don't force autohint, that's just for testing freetype and doesn't look as good */
int render_mode = FT_LOAD_DEFAULT;
int m, mfound;
/* Now tuneable thanks to Wez Furlong */
double linespace = LINESPACE;
/* 2.0.6: put this declaration with the other declarations! */
/*
* make a new tweenColorCache on every call
* because caching colormappings between calls
* is not safe. If the im-pointer points to a
* brand new image, the cache gives out bogus
* colorindexes. -- 27.06.2001 <krisku@arrak.fi>
*/
gdCache_head_t *tc_cache;
/* Tuneable horizontal and vertical resolution in dots per inch */
int hdpi, vdpi;
if (strex && ((strex->flags & gdFTEX_LINESPACE) == gdFTEX_LINESPACE)) {
linespace = strex->linespacing;
}
tc_cache = gdCacheCreate(TWEENCOLORCACHESIZE, tweenColorTest, tweenColorFetch, tweenColorRelease);
/***** initialize font library and font cache on first call ******/
gdMutexLock(gdFontCacheMutex);
if (!fontCache) {
if (gdFontCacheSetup() != 0) {
gdCacheDelete(tc_cache);
gdMutexUnlock(gdFontCacheMutex);
return "Failure to initialize font library";
}
}
/*****/
/* get the font (via font cache) */
fontkey.fontlist = fontlist;
fontkey.library = &library;
font = (font_t *) gdCacheGet (fontCache, &fontkey);
if (!font) {
gdCacheDelete(tc_cache);
gdMutexUnlock(gdFontCacheMutex);
return fontCache->error;
}
face = font->face; /* shortcut */
slot = face->glyph; /* shortcut */
/*
* Added hdpi and vdpi to support images at non-screen resolutions, i.e. 300 dpi TIFF,
* or 100h x 50v dpi FAX format. 2.0.23.
* 2004/02/27 Mark Shackelford, mark.shackelford@acs-inc.com
*/
hdpi = GD_RESOLUTION;
vdpi = GD_RESOLUTION;
if (strex && (strex->flags & gdFTEX_RESOLUTION)) {
hdpi = strex->hdpi;
vdpi = strex->vdpi;
}
if (FT_Set_Char_Size(face, 0, (FT_F26Dot6) (ptsize * 64), hdpi, vdpi)) {
gdCacheDelete(tc_cache);
gdMutexUnlock(gdFontCacheMutex);
return "Could not set character size";
}
matrix.xx = (FT_Fixed) (cos_a * (1 << 16));
matrix.yx = (FT_Fixed) (sin_a * (1 << 16));
matrix.xy = -matrix.yx;
matrix.yy = matrix.xx;
penf.x = penf.y = 0; /* running position of non-rotated string */
pen.x = pen.y = 0; /* running position of rotated string */
bbox.xMin = bbox.xMax = bbox.yMin = bbox.yMax = 0;
use_kerning = FT_HAS_KERNING (face);
previous = 0;
if (fg < 0) {
render_mode |= FT_LOAD_MONOCHROME;
}
/* 2.0.12: allow explicit specification of the preferred map;
* but we still fall back if it is not available.
*/
m = gdFTEX_Unicode;
if (strex && (strex->flags & gdFTEX_CHARMAP)) {
m = strex->charmap;
}
/* Try all three types of maps, but start with the specified one */
mfound = 0;
for (i = 0; i < 3; i++) {
switch (m) {
case gdFTEX_Unicode:
if (font->have_char_map_unicode) {
mfound = 1;
}
break;
case gdFTEX_Shift_JIS:
if (font->have_char_map_sjis) {
mfound = 1;
}
break;
case gdFTEX_Big5:
/* This was the 'else' case, we can't really 'detect' it */
mfound = 1;
break;
}
if (mfound) {
break;
}
m++;
m %= 3;
}
if (!mfound) {
/* No character set found! */
gdMutexUnlock(gdFontCacheMutex);
return "No character set found";
}
#ifndef JISX0208
if (font->have_char_map_sjis) {
#endif
tmpstr = (char *) gdMalloc(BUFSIZ);
any2eucjp(tmpstr, string, BUFSIZ);
next = tmpstr;
#ifndef JISX0208
} else {
next = string;
}
#endif
i = 0;
while (*next) {
ch = *next;
/* carriage returns */
if (ch == '\r') {
penf.x = 0;
x1 = (int)(- penf.y * sin_a + 32) / 64;
y1 = (int)(- penf.y * cos_a + 32) / 64;
pen.x = pen.y = 0;
previous = 0; /* clear kerning flag */
next++;
continue;
}
/* newlines */
if (ch == '\n') {
if (!*(++next)) break;
/* 2.0.13: reset penf.x. Christopher J. Grayce */
penf.x = 0;
penf.y -= (long)(face->size->metrics.height * linespace);
penf.y = (penf.y - 32) & -64; /* round to next pixel row */
x1 = (int)(- penf.y * sin_a + 32) / 64;
y1 = (int)(- penf.y * cos_a + 32) / 64;
xb = x + x1;
yb = y + y1;
yd = 0;
pen.x = pen.y = 0;
previous = 0; /* clear kerning flag */
continue;
}
/* EAM DEBUG */
#if (defined(FREETYPE_MAJOR) && ((FREETYPE_MAJOR == 2 && ((FREETYPE_MINOR == 1 && FREETYPE_PATCH >= 3) || FREETYPE_MINOR > 1) || FREETYPE_MAJOR > 2)))
if (font->face->family_name && font->face->charmap->encoding &&
font->face->charmap->encoding == FT_ENCODING_MS_SYMBOL && strcmp(font->face->family_name, "Symbol") == 0) {
/* I do not know the significance of the constant 0xf000.
* It was determined by inspection of the character codes
* stored in Microsoft font symbol.
* Added by Pierre (pajoye@php.net):
* Convert to the Symbol glyph range only for a Symbol family member
*/
len = gdTcl_UtfToUniChar (next, &ch);
ch |= 0xf000;
next += len;
} else
#endif /* Freetype 2.1 or better */
/* EAM DEBUG */
switch (m) {
case gdFTEX_Unicode:
if (font->have_char_map_unicode) {
/* use UTF-8 mapping from ASCII */
len = gdTcl_UtfToUniChar(next, &ch);
next += len;
}
break;
case gdFTEX_Shift_JIS:
if (font->have_char_map_sjis) {
unsigned char c;
int jiscode;
c = *next;
if (0xA1 <= c && c <= 0xFE) {
next++;
jiscode = 0x100 * (c & 0x7F) + ((*next) & 0x7F);
ch = (jiscode >> 8) & 0xFF;
jiscode &= 0xFF;
if (ch & 1) {
jiscode += 0x40 - 0x21;
} else {
jiscode += 0x9E - 0x21;
}
if (jiscode >= 0x7F) {
jiscode++;
}
ch = (ch - 0x21) / 2 + 0x81;
if (ch >= 0xA0) {
ch += 0x40;
}
ch = (ch << 8) + jiscode;
} else {
ch = c & 0xFF; /* don't extend sign */
}
if (*next) next++;
}
break;
case gdFTEX_Big5: {
/*
* Big 5 mapping:
* use "JIS-8 half-width katakana" coding from 8-bit characters. Ref:
* ftp://ftp.ora.com/pub/examples/nutshell/ujip/doc/japan.inf-032092.sjs
*/
ch = (*next) & 0xFF; /* don't extend sign */
next++;
if (ch >= 161 /* first code of JIS-8 pair */
&& *next) { /* don't advance past '\0' */
/* TBB: Fix from Kwok Wah On: & 255 needed */
ch = (ch * 256) + ((*next) & 255);
next++;
}
}
break;
}
/* set rotation transform */
FT_Set_Transform(face, &matrix, NULL);
/* Convert character code to glyph index */
glyph_index = FT_Get_Char_Index(face, ch);
/* retrieve kerning distance and move pen position */
if (use_kerning && previous && glyph_index) {
FT_Get_Kerning(face, previous, glyph_index, ft_kerning_default, &delta);
pen.x += delta.x;
penf.x += delta.x;
}
/* load glyph image into the slot (erase previous one) */
if (FT_Load_Glyph(face, glyph_index, render_mode)) {
if (tmpstr) {
gdFree(tmpstr);
}
gdCacheDelete(tc_cache);
gdMutexUnlock(gdFontCacheMutex);
return "Problem loading glyph";
}
/* transform glyph image */
FT_Get_Glyph(slot, &image);
if (brect) { /* only if need brect */
FT_Glyph_Get_CBox(image, ft_glyph_bbox_gridfit, &glyph_bbox);
glyph_bbox.xMin += penf.x;
glyph_bbox.yMin += penf.y;
glyph_bbox.xMax += penf.x;
glyph_bbox.yMax += penf.y;
if (ch == ' ') { /* special case for trailing space */
glyph_bbox.xMax += slot->metrics.horiAdvance;
}
if (!i) { /* if first character, init BB corner values */
yd = slot->metrics.height - slot->metrics.horiBearingY;
bbox.xMin = glyph_bbox.xMin;
bbox.yMin = glyph_bbox.yMin;
bbox.xMax = glyph_bbox.xMax;
bbox.yMax = glyph_bbox.yMax;
} else {
FT_Pos desc;
if ( (desc = (slot->metrics.height - slot->metrics.horiBearingY)) > yd) {
yd = desc;
}
if (bbox.xMin > glyph_bbox.xMin) {
bbox.xMin = glyph_bbox.xMin;
}
if (bbox.yMin > glyph_bbox.yMin) {
bbox.yMin = glyph_bbox.yMin;
}
if (bbox.xMax < glyph_bbox.xMax) {
bbox.xMax = glyph_bbox.xMax;
}
if (bbox.yMax < glyph_bbox.yMax) {
bbox.yMax = glyph_bbox.yMax;
}
}
i++;
}
if (render) {
if (image->format != ft_glyph_format_bitmap && FT_Glyph_To_Bitmap(&image, ft_render_mode_normal, 0, 1)) {
FT_Done_Glyph(image);
if (tmpstr) {
gdFree(tmpstr);
}
gdCacheDelete(tc_cache);
gdMutexUnlock(gdFontCacheMutex);
return "Problem rendering glyph";
}
/* now, draw to our target surface */
bm = (FT_BitmapGlyph) image;
gdft_draw_bitmap(tc_cache, im, fg, bm->bitmap, x + x1 + ((pen.x + 31) >> 6) + bm->left, y + y1 + ((pen.y + 31) >> 6) - bm->top);
}
/* record current glyph index for kerning */
previous = glyph_index;
/* increment pen position */
pen.x += image->advance.x >> 10;
pen.y -= image->advance.y >> 10;
penf.x += slot->metrics.horiAdvance;
FT_Done_Glyph(image);
}
if (brect) { /* only if need brect */
/* For perfect rounding, must get sin(a + pi/4) and sin(a - pi/4). */
double d1 = sin (angle + 0.78539816339744830962);
double d2 = sin (angle - 0.78539816339744830962);
/* make the center of rotation at (0, 0) */
FT_BBox normbox;
normbox.xMin = 0;
normbox.yMin = 0;
normbox.xMax = bbox.xMax - bbox.xMin;
normbox.yMax = bbox.yMax - bbox.yMin;
brect[0] = brect[2] = brect[4] = brect[6] = (int) (yd * sin_a);
brect[1] = brect[3] = brect[5] = brect[7] = (int)(- yd * cos_a);
/* rotate bounding rectangle */
brect[0] += (int) (normbox.xMin * cos_a - normbox.yMin * sin_a);
brect[1] += (int) (normbox.xMin * sin_a + normbox.yMin * cos_a);
brect[2] += (int) (normbox.xMax * cos_a - normbox.yMin * sin_a);
brect[3] += (int) (normbox.xMax * sin_a + normbox.yMin * cos_a);
brect[4] += (int) (normbox.xMax * cos_a - normbox.yMax * sin_a);
brect[5] += (int) (normbox.xMax * sin_a + normbox.yMax * cos_a);
brect[6] += (int) (normbox.xMin * cos_a - normbox.yMax * sin_a);
brect[7] += (int) (normbox.xMin * sin_a + normbox.yMax * cos_a);
/* scale, round and offset brect */
brect[0] = xb + gdroundupdown(brect[0], d2 > 0);
brect[1] = yb - gdroundupdown(brect[1], d1 < 0);
brect[2] = xb + gdroundupdown(brect[2], d1 > 0);
brect[3] = yb - gdroundupdown(brect[3], d2 > 0);
brect[4] = xb + gdroundupdown(brect[4], d2 < 0);
brect[5] = yb - gdroundupdown(brect[5], d1 > 0);
brect[6] = xb + gdroundupdown(brect[6], d1 < 0);
brect[7] = yb - gdroundupdown(brect[7], d2 < 0);
}
if (tmpstr) {
gdFree(tmpstr);
}
gdCacheDelete(tc_cache);
gdMutexUnlock(gdFontCacheMutex);
return (char *) NULL;
}
#endif /* HAVE_LIBFREETYPE */
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