diff options
Diffstat (limited to 'src/cairo_font.c')
| -rw-r--r-- | src/cairo_font.c | 476 |
1 files changed, 0 insertions, 476 deletions
diff --git a/src/cairo_font.c b/src/cairo_font.c deleted file mode 100644 index 529c1c7c..00000000 --- a/src/cairo_font.c +++ /dev/null @@ -1,476 +0,0 @@ -/* cairo - a vector graphics library with display and print output - * - * Copyright © 2002 University of Southern California - * Copyright © 2005 Red Hat Inc. - * - * This library is free software; you can redistribute it and/or - * modify it either under the terms of the GNU Lesser General Public - * License version 2.1 as published by the Free Software Foundation - * (the "LGPL") or, at your option, under the terms of the Mozilla - * Public License Version 1.1 (the "MPL"). If you do not alter this - * notice, a recipient may use your version of this file under either - * the MPL or the LGPL. - * - * You should have received a copy of the LGPL along with this library - * in the file COPYING-LGPL-2.1; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * You should have received a copy of the MPL along with this library - * in the file COPYING-MPL-1.1 - * - * The contents of this file are subject to the Mozilla Public License - * Version 1.1 (the "License"); you may not use this file except in - * compliance with the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY - * OF ANY KIND, either express or implied. See the LGPL or the MPL for - * the specific language governing rights and limitations. - * - * The Original Code is the cairo graphics library. - * - * The Initial Developer of the Original Code is University of Southern - * California. - * - * Contributor(s): - * Carl D. Worth <cworth@cworth.org> - * Graydon Hoare <graydon@redhat.com> - * Owen Taylor <otaylor@redhat.com> - */ - -#include "cairoint.h" - -/* Now the internal "unscaled + scale" font API */ - -cairo_private cairo_status_t -_cairo_font_create (const char *family, - cairo_font_slant_t slant, - cairo_font_weight_t weight, - cairo_font_scale_t *sc, - cairo_font_t **font) -{ - const cairo_font_backend_t *backend = CAIRO_FONT_BACKEND_DEFAULT; - - return backend->create (family, slant, weight, sc, font); -} - -void -_cairo_font_init (cairo_font_t *font, - cairo_font_scale_t *scale, - const cairo_font_backend_t *backend) -{ - font->scale = *scale; - font->refcount = 1; - font->backend = backend; -} - -void -_cairo_unscaled_font_init (cairo_unscaled_font_t *font, - const cairo_font_backend_t *backend) -{ - font->refcount = 1; - font->backend = backend; -} - -cairo_status_t -_cairo_font_text_to_glyphs (cairo_font_t *font, - const unsigned char *utf8, - cairo_glyph_t **glyphs, - int *num_glyphs) -{ - return font->backend->text_to_glyphs (font, utf8, glyphs, num_glyphs); -} - -cairo_status_t -_cairo_font_glyph_extents (cairo_font_t *font, - cairo_glyph_t *glyphs, - int num_glyphs, - cairo_text_extents_t *extents) -{ - return font->backend->glyph_extents(font, glyphs, num_glyphs, extents); -} - - -cairo_status_t -_cairo_font_glyph_bbox (cairo_font_t *font, - cairo_glyph_t *glyphs, - int num_glyphs, - cairo_box_t *bbox) -{ - return font->backend->glyph_bbox (font, glyphs, num_glyphs, bbox); -} - -cairo_status_t -_cairo_font_show_glyphs (cairo_font_t *font, - cairo_operator_t operator, - cairo_pattern_t *pattern, - cairo_surface_t *surface, - int source_x, - int source_y, - int dest_x, - int dest_y, - unsigned int width, - unsigned int height, - cairo_glyph_t *glyphs, - int num_glyphs) -{ - cairo_status_t status; - if (surface->backend->show_glyphs != NULL) { - status = surface->backend->show_glyphs (font, operator, pattern, - surface, - source_x, source_y, - dest_x, dest_y, - width, height, - glyphs, num_glyphs); - if (status == CAIRO_STATUS_SUCCESS) - return status; - } - - /* Surface display routine either does not exist or failed. */ - return font->backend->show_glyphs (font, operator, pattern, - surface, - source_x, source_y, - dest_x, dest_y, - width, height, - glyphs, num_glyphs); -} - -cairo_status_t -_cairo_font_glyph_path (cairo_font_t *font, - cairo_glyph_t *glyphs, - int num_glyphs, - cairo_path_t *path) -{ - return font->backend->glyph_path (font, glyphs, num_glyphs, path); -} - -void -_cairo_font_get_glyph_cache_key (cairo_font_t *font, - cairo_glyph_cache_key_t *key) -{ - font->backend->get_glyph_cache_key (font, key); -} - -cairo_status_t -_cairo_font_font_extents (cairo_font_t *font, - cairo_font_extents_t *extents) -{ - return font->backend->font_extents (font, extents); -} - -void -_cairo_unscaled_font_reference (cairo_unscaled_font_t *font) -{ - font->refcount++; -} - -void -_cairo_unscaled_font_destroy (cairo_unscaled_font_t *font) -{ - if (--(font->refcount) > 0) - return; - - font->backend->destroy_unscaled_font (font); -} - - - -/* Public font API follows. */ - -void -cairo_font_reference (cairo_font_t *font) -{ - font->refcount++; -} - -void -cairo_font_destroy (cairo_font_t *font) -{ - if (--(font->refcount) > 0) - return; - - font->backend->destroy_font (font); -} - -/** - * cairo_font_extents: - * @font: a #cairo_font_t - * @font_matrix: the font transformation for which this font was - * created. (See cairo_transform_font()). This is needed - * properly convert the metrics from the font into user space. - * @extents: a #cairo_font_extents_t which to store the retrieved extents. - * - * Gets the metrics for a #cairo_font_t. - * - * Return value: %CAIRO_STATUS_SUCCESS on success. Otherwise, an - * error such as %CAIRO_STATUS_NO_MEMORY. - **/ -cairo_status_t -cairo_font_extents (cairo_font_t *font, - cairo_matrix_t *font_matrix, - cairo_font_extents_t *extents) -{ - cairo_int_status_t status; - double font_scale_x, font_scale_y; - - status = _cairo_font_font_extents (font, extents); - - if (!CAIRO_OK (status)) - return status; - - _cairo_matrix_compute_scale_factors (font_matrix, - &font_scale_x, &font_scale_y, - /* XXX */ 1); - - /* - * The font responded in unscaled units, scale by the font - * matrix scale factors to get to user space - */ - - extents->ascent *= font_scale_y; - extents->descent *= font_scale_y; - extents->height *= font_scale_y; - extents->max_x_advance *= font_scale_x; - extents->max_y_advance *= font_scale_y; - - return status; -} - -/** - * cairo_font_glyph_extents: - * @font: a #cairo_font_t - * @font_matrix: the font transformation for which this font was - * created. (See cairo_transform_font()). This is needed - * properly convert the metrics from the font into user space. - * @glyphs: an array of glyph IDs with X and Y offsets. - * @num_glyphs: the number of glyphs in the @glyphs array - * @extents: a #cairo_text_extents_t which to store the retrieved extents. - * - * cairo_font_glyph_extents() gets the overall metrics for a string of - * glyphs. The X and Y offsets in @glyphs are taken from an origin of 0,0. - **/ -void -cairo_font_glyph_extents (cairo_font_t *font, - cairo_matrix_t *font_matrix, - cairo_glyph_t *glyphs, - int num_glyphs, - cairo_text_extents_t *extents) -{ - cairo_status_t status = CAIRO_STATUS_SUCCESS; - cairo_glyph_t origin_glyph; - cairo_text_extents_t origin_extents; - int i; - double min_x = 0.0, min_y = 0.0, max_x = 0.0, max_y = 0.0; - double x_pos = 0.0, y_pos = 0.0; - int set = 0; - - if (!num_glyphs) - { - extents->x_bearing = 0.0; - extents->y_bearing = 0.0; - extents->width = 0.0; - extents->height = 0.0; - extents->x_advance = 0.0; - extents->y_advance = 0.0; - - return; - } - - for (i = 0; i < num_glyphs; i++) - { - double x, y; - double wm, hm; - - origin_glyph = glyphs[i]; - origin_glyph.x = 0.0; - origin_glyph.y = 0.0; - status = _cairo_font_glyph_extents (font, - &origin_glyph, 1, - &origin_extents); - - /* - * Transform font space metrics into user space metrics - * by running the corners through the font matrix and - * expanding the bounding box as necessary - */ - x = origin_extents.x_bearing; - y = origin_extents.y_bearing; - cairo_matrix_transform_point (font_matrix, - &x, &y); - - for (hm = 0.0; hm <= 1.0; hm += 1.0) - for (wm = 0.0; wm <= 1.0; wm += 1.0) - { - x = origin_extents.x_bearing + origin_extents.width * wm; - y = origin_extents.y_bearing + origin_extents.height * hm; - cairo_matrix_transform_point (font_matrix, - &x, &y); - x += glyphs[i].x; - y += glyphs[i].y; - if (!set) - { - min_x = max_x = x; - min_y = max_y = y; - set = 1; - } - else - { - if (x < min_x) min_x = x; - if (x > max_x) max_x = x; - if (y < min_y) min_y = y; - if (y > max_y) max_y = y; - } - } - - x = origin_extents.x_advance; - y = origin_extents.y_advance; - cairo_matrix_transform_point (font_matrix, - &x, &y); - x_pos = glyphs[i].x + x; - y_pos = glyphs[i].y + y; - } - - extents->x_bearing = min_x - glyphs[0].x; - extents->y_bearing = min_y - glyphs[0].y; - extents->width = max_x - min_x; - extents->height = max_y - min_y; - extents->x_advance = x_pos - glyphs[0].x; - extents->y_advance = y_pos - glyphs[0].y; -} - -/* Now we implement functions to access a default global image & metrics - * cache. - */ - -unsigned long -_cairo_glyph_cache_hash (void *cache, void *key) -{ - cairo_glyph_cache_key_t *in; - in = (cairo_glyph_cache_key_t *) key; - return - ((unsigned long) in->unscaled) - ^ ((unsigned long) in->scale.matrix[0][0]) - ^ ((unsigned long) in->scale.matrix[0][1]) - ^ ((unsigned long) in->scale.matrix[1][0]) - ^ ((unsigned long) in->scale.matrix[1][1]) - ^ (in->flags * 1451) /* 1451 is just an abitrary prime */ - ^ in->index; -} - -int -_cairo_glyph_cache_keys_equal (void *cache, - void *k1, - void *k2) -{ - cairo_glyph_cache_key_t *a, *b; - a = (cairo_glyph_cache_key_t *) k1; - b = (cairo_glyph_cache_key_t *) k2; - return (a->index == b->index) - && (a->unscaled == b->unscaled) - && (a->flags == b->flags) - && (a->scale.matrix[0][0] == b->scale.matrix[0][0]) - && (a->scale.matrix[0][1] == b->scale.matrix[0][1]) - && (a->scale.matrix[1][0] == b->scale.matrix[1][0]) - && (a->scale.matrix[1][1] == b->scale.matrix[1][1]); -} - - -static cairo_status_t -_image_glyph_cache_create_entry (void *cache, - void *key, - void **return_value) -{ - cairo_glyph_cache_key_t *k = (cairo_glyph_cache_key_t *) key; - cairo_image_glyph_cache_entry_t *im; - cairo_status_t status; - - im = calloc (1, sizeof (cairo_image_glyph_cache_entry_t)); - if (im == NULL) - return CAIRO_STATUS_NO_MEMORY; - - im->key = *k; - status = im->key.unscaled->backend->create_glyph (im); - - if (status != CAIRO_STATUS_SUCCESS) { - free (im); - return status; - } - - _cairo_unscaled_font_reference (im->key.unscaled); - - im->key.base.memory = - sizeof (cairo_image_glyph_cache_entry_t) - + (im->image ? - sizeof (cairo_image_surface_t) - + 28 * sizeof (int) /* rough guess at size of pixman image structure */ - + (im->image->height * im->image->stride) : 0); - - *return_value = im; - - return CAIRO_STATUS_SUCCESS; -} - - -static void -_image_glyph_cache_destroy_entry (void *cache, - void *value) -{ - cairo_image_glyph_cache_entry_t *im; - - im = (cairo_image_glyph_cache_entry_t *) value; - _cairo_unscaled_font_destroy (im->key.unscaled); - cairo_surface_destroy (&(im->image->base)); - free (im); -} - -static void -_image_glyph_cache_destroy_cache (void *cache) -{ - free (cache); -} - -static const cairo_cache_backend_t cairo_image_cache_backend = { - _cairo_glyph_cache_hash, - _cairo_glyph_cache_keys_equal, - _image_glyph_cache_create_entry, - _image_glyph_cache_destroy_entry, - _image_glyph_cache_destroy_cache -}; - -void -_cairo_lock_global_image_glyph_cache() -{ - /* FIXME: implement locking. */ -} - -void -_cairo_unlock_global_image_glyph_cache() -{ - /* FIXME: implement locking. */ -} - -static cairo_cache_t * -_global_image_glyph_cache = NULL; - -cairo_cache_t * -_cairo_get_global_image_glyph_cache () -{ - if (_global_image_glyph_cache == NULL) { - _global_image_glyph_cache = malloc (sizeof (cairo_cache_t)); - - if (_global_image_glyph_cache == NULL) - goto FAIL; - - if (_cairo_cache_init (_global_image_glyph_cache, - &cairo_image_cache_backend, - CAIRO_IMAGE_GLYPH_CACHE_MEMORY_DEFAULT)) - goto FAIL; - } - - return _global_image_glyph_cache; - - FAIL: - if (_global_image_glyph_cache) - free (_global_image_glyph_cache); - _global_image_glyph_cache = NULL; - return NULL; -} |