MapServer/src/fontcache.c at main · MapServer/MapServer · GitHub

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/******************************************************************************

* Project: MapServer

* Purpose: Freetype Font helper functions

* Author: Thomas Bonfort and the MapServer team.

******************************************************************************

* 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 of this Software or works derived from this 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.

*****************************************************************************/

#include "mapserver.h"

#include "mapthread.h"

#include "fontcache.h"

#include "dejavu-sans-condensed.h"

#include "cpl_conv.h"

typedef struct {

FT_Library library;

face_element *face_cache;

glyph_element *bitmap_glyph_cache;

} ft_cache;

#ifdef USE_THREAD

typedef struct ft_thread_cache ft_thread_cache;

struct ft_thread_cache {

void *thread_id;

ft_thread_cache *next;

ft_cache cache;

};

ft_thread_cache *ft_caches;

int use_global_ft_cache;

#else

ft_cache global_ft_cache;

#endif

void msInitFontCache(ft_cache *c) {

memset(c, 0, sizeof(ft_cache));

FT_Init_FreeType(&c->library);

}

void msFreeFontCache(ft_cache *c) {

/* ... TODO ... */

face_element *cur_face, *tmp_face;

glyph_element *cur_bitmap, *tmp_bitmap;

UT_HASH_ITER(hh, c->face_cache, cur_face, tmp_face) {

index_element *cur_index, *tmp_index;

outline_element *cur_outline, *tmp_outline;

glyph_element *cur_glyph, *tmp_glyph;

UT_HASH_ITER(hh, cur_face->index_cache, cur_index, tmp_index) {

UT_HASH_DEL(cur_face->index_cache, cur_index);

free(cur_index);

}

UT_HASH_ITER(hh, cur_face->outline_cache, cur_outline, tmp_outline) {

UT_HASH_DEL(cur_face->outline_cache, cur_outline);

FT_Outline_Done(c->library, &cur_outline->outline);

free(cur_outline);

}

UT_HASH_ITER(hh, cur_face->glyph_cache, cur_glyph, tmp_glyph) {

UT_HASH_DEL(cur_face->glyph_cache, cur_glyph);

free(cur_glyph);

}

#ifdef USE_HARFBUZZ

if (cur_face->hbfont) {

hb_font_destroy(cur_face->hbfont->hbfont);

hb_font_destroy(cur_face->hbfont->hbparentfont);

hb_font_funcs_destroy(cur_face->hbfont->funcs);

free(cur_face->hbfont);

}

#endif

FT_Done_Face(cur_face->face);

free(cur_face->font);

UT_HASH_DEL(c->face_cache, cur_face);

free(cur_face);

}

FT_Done_FreeType(c->library);

UT_HASH_ITER(hh, c->bitmap_glyph_cache, cur_bitmap, tmp_bitmap) {

UT_HASH_DEL(c->bitmap_glyph_cache, cur_bitmap);

free(cur_bitmap);

}

memset(c, 0, sizeof(ft_cache));

}

ft_cache *msGetFontCache() {

#ifndef USE_THREAD

return &global_ft_cache;

#else

void *nThreadId = 0;

ft_thread_cache *prev = NULL, *cur = ft_caches;

if (!use_global_ft_cache)

nThreadId = msGetThreadId();

if (cur != NULL && cur->thread_id == nThreadId)

return &cur->cache;

/* -------------------------------------------------------------------- */

/* Search for cache for this thread */

/* -------------------------------------------------------------------- */

msAcquireLock(TLOCK_TTF);

cur = ft_caches;

while (cur != NULL && cur->thread_id != nThreadId) {

prev = cur;

cur = cur->next;

}

/* -------------------------------------------------------------------- */

/* If we found it, make sure it is pushed to the front of the */

/* link for faster finding next time, and return it. */

/* -------------------------------------------------------------------- */

if (cur != NULL) {

if (prev != NULL) {

prev->next = cur->next;

cur->next = ft_caches;

ft_caches = cur;

}

msReleaseLock(TLOCK_TTF);

return &cur->cache;

}

/* -------------------------------------------------------------------- */

/* Create a new context group for this thread. */

/* -------------------------------------------------------------------- */

cur = msSmallMalloc(sizeof(ft_thread_cache));

cur->next = NULL;

cur->thread_id = nThreadId;

msInitFontCache(&cur->cache);

cur->next = ft_caches;

ft_caches = cur;

msReleaseLock(TLOCK_TTF);

return &cur->cache;

#endif

}

void msFontCacheSetup() {

#ifndef USE_THREAD

ft_cache *c = msGetFontCache();

msInitFontCache(c);

#else

const char *use_global_cache =

CPLGetConfigOption("MS_USE_GLOBAL_FT_CACHE", NULL);

if (use_global_cache)

use_global_ft_cache = atoi(use_global_cache);

else

use_global_ft_cache = 0;

ft_caches = NULL;

#endif

}

void msFontCacheCleanup() {

#ifndef USE_THREAD

ft_cache *c = msGetFontCache();

msFreeFontCache(c);

#else

ft_thread_cache *cur, *next;

msAcquireLock(TLOCK_TTF);

cur = ft_caches;

while (cur != NULL) {

msFreeFontCache(&cur->cache);

next = cur->next;

free(cur);

cur = next;

}

ft_caches = NULL;

msReleaseLock(TLOCK_TTF);

#endif

}

unsigned int msGetGlyphIndex(face_element *face, unsigned int unicode) {

index_element *ic;

if (face->face->charmap &&

face->face->charmap->encoding == FT_ENCODING_MS_SYMBOL) {

unicode |= 0xf000; /* why? */

}

#ifdef USE_THREAD

if (use_global_ft_cache)

msAcquireLock(TLOCK_TTF);

#endif

UT_HASH_FIND_INT(face->index_cache, &unicode, ic);

if (!ic) {

ic = msSmallMalloc(sizeof(index_element));

ic->codepoint = FT_Get_Char_Index(face->face, unicode);

ic->unicode = unicode;

UT_HASH_ADD_INT(face->index_cache, unicode, ic);

}

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return ic->codepoint;

}

#define MS_DEFAULT_FONT_KEY "_ms_default_"

face_element *msGetFontFace(const char *key, fontSetObj *fontset) {

face_element *fc;

int error;

ft_cache *cache = msGetFontCache();

if (!key) {

key = MS_DEFAULT_FONT_KEY;

}

#ifdef USE_THREAD

if (use_global_ft_cache)

msAcquireLock(TLOCK_TTF);

#endif

UT_HASH_FIND_STR(cache->face_cache, key, fc);

if (!fc) {

const char *fontfile = NULL;

fc = msSmallCalloc(1, sizeof(face_element));

if (fontset && strcmp(key, MS_DEFAULT_FONT_KEY)) {

fontfile = msLookupHashTable(&(fontset->fonts), key);

if (!fontfile) {

msSetError(MS_MISCERR, "Could not find font with key \"%s\" in fontset",

"msGetFontFace()", key);

free(fc);

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return NULL;

}

error = FT_New_Face(cache->library, fontfile, 0, &(fc->face));

} else {

error = FT_New_Memory_Face(cache->library, dejavu_sans_condensed_ttf,

dejavu_sans_condensed_ttf_len, 0, &(fc->face));

}

if (error) {

msSetError(MS_MISCERR,

"Freetype was unable to load font file \"%s\" for key \"%s\"",

"msGetFontFace()", fontfile, key);

free(fc);

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return NULL;

}

if (!fc->face->charmap) {

/* The font file has no unicode charmap, select an alternate one */

if (FT_Select_Charmap(fc->face, FT_ENCODING_MS_SYMBOL))

FT_Select_Charmap(fc->face, FT_ENCODING_APPLE_ROMAN);

/* the previous calls may have failed, we ignore as there's nothing much

* left to do */

}

fc->font = msStrdup(key);

UT_HASH_ADD_KEYPTR(hh, cache->face_cache, fc->font, strlen(key), fc);

}

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return fc;

}

glyph_element *msGetGlyphByIndex(face_element *face, unsigned int size,

unsigned int codepoint) {

glyph_element *gc;

glyph_element_key key;

memset(&key, 0, sizeof(glyph_element_key));

key.codepoint = codepoint;

key.size = size;

#ifdef USE_THREAD

if (use_global_ft_cache)

msAcquireLock(TLOCK_TTF);

#endif

UT_HASH_FIND(hh, face->glyph_cache, &key, sizeof(glyph_element_key), gc);

if (!gc) {

FT_Error error;

gc = msSmallMalloc(sizeof(glyph_element));

if (MS_NINT(size * 96.0 / 72.0) != face->face->size->metrics.x_ppem) {

FT_Set_Pixel_Sizes(face->face, 0, MS_NINT(size * 96 / 72.0));

}

error =

FT_Load_Glyph(face->face, key.codepoint,

FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP | FT_LOAD_NO_HINTING |

FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);

if (error) {

msDebug("Unable to load glyph %u for font \"%s\". Using ? as fallback.\n",

key.codepoint, face->font);

// If we can't find a glyph then try to fallback to a question mark.

unsigned int fallbackCodepoint = msGetGlyphIndex(face, 0x3F);

error = FT_Load_Glyph(face->face, fallbackCodepoint,

FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP |

FT_LOAD_NO_HINTING |

FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);

}

if (error) {

msSetError(MS_MISCERR, "unable to load glyph %u for font \"%s\"",

"msGetGlyphByIndex()", key.codepoint, face->font);

free(gc);

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return NULL;

}

gc->metrics.minx = face->face->glyph->metrics.horiBearingX / 64.0;

gc->metrics.maxx =

gc->metrics.minx + face->face->glyph->metrics.width / 64.0;

gc->metrics.maxy = face->face->glyph->metrics.horiBearingY / 64.0;

gc->metrics.miny =

gc->metrics.maxy - face->face->glyph->metrics.height / 64.0;

gc->metrics.advance = face->face->glyph->metrics.horiAdvance / 64.0;

gc->key = key;

UT_HASH_ADD(hh, face->glyph_cache, key, sizeof(glyph_element_key), gc);

}

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return gc;

}

outline_element *msGetGlyphOutline(face_element *face, glyph_element *glyph) {

outline_element *oc;

outline_element_key key;

ft_cache *cache = msGetFontCache();

memset(&key, 0, sizeof(outline_element_key));

key.glyph = glyph;

#ifdef USE_THREAD

if (use_global_ft_cache)

msAcquireLock(TLOCK_TTF);

#endif

UT_HASH_FIND(hh, face->outline_cache, &key, sizeof(outline_element_key), oc);

if (!oc) {

FT_Matrix matrix;

FT_Vector pen;

FT_Error error;

oc = msSmallMalloc(sizeof(outline_element));

if (MS_NINT(glyph->key.size * 96.0 / 72.0) !=

face->face->size->metrics.x_ppem) {

FT_Set_Pixel_Sizes(face->face, 0, MS_NINT(glyph->key.size * 96 / 72.0));

}

matrix.xx = matrix.yy = 0x10000L;

matrix.xy = matrix.yx = 0x00000L;

pen.x = pen.y = 0;

FT_Set_Transform(face->face, &matrix, &pen);

error = FT_Load_Glyph(

face->face, glyph->key.codepoint,

FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP /*|FT_LOAD_IGNORE_TRANSFORM*/ |

FT_LOAD_NO_HINTING | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);

if (error) {

msDebug("Unable to load glyph %u for font \"%s\". Using ? as fallback.\n",

glyph->key.codepoint, face->font);

// If we can't find a glyph then try to fallback to a question mark.

unsigned int fallbackCodepoint = msGetGlyphIndex(face, 0x3F);

error = FT_Load_Glyph(

face->face, fallbackCodepoint,

FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP /*|FT_LOAD_IGNORE_TRANSFORM*/ |

FT_LOAD_NO_HINTING | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);

}

if (error) {

msSetError(MS_MISCERR, "unable to load glyph %u for font \"%s\"",

"msGetGlyphOutline()", glyph->key.codepoint, face->font);

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return NULL;

}

error = FT_Outline_New(cache->library, face->face->glyph->outline.n_points,

face->face->glyph->outline.n_contours, &oc->outline);

(void)error;

FT_Outline_Copy(&face->face->glyph->outline, &oc->outline);

oc->key = key;

UT_HASH_ADD(hh, face->outline_cache, key, sizeof(outline_element_key), oc);

}

#ifdef USE_THREAD

if (use_global_ft_cache)

msReleaseLock(TLOCK_TTF);

#endif

return oc;

}

int msIsGlyphASpace(glyphObj *glyph) {

/* space or tab, for now */

unsigned int space, tab;

space = msGetGlyphIndex(glyph->face, 0x20);

tab = msGetGlyphIndex(glyph->face, 0x9);

return glyph->glyph->key.codepoint == space ||

glyph->glyph->key.codepoint == tab;

}

MapServer/src/fontcache.c at main · MapServer/MapServer · GitHub

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MapServer/src/fontcache.c at main · MapServer/MapServer · GitHub

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