1 /* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
2 /* cairo - a vector graphics library with display and print output
4 * Copyright © 2008 Adrian Johnson
6 * This library is free software; you can redistribute it and/or
7 * modify it either under the terms of the GNU Lesser General Public
8 * License version 2.1 as published by the Free Software Foundation
9 * (the "LGPL") or, at your option, under the terms of the Mozilla
10 * Public License Version 1.1 (the "MPL"). If you do not alter this
11 * notice, a recipient may use your version of this file under either
12 * the MPL or the LGPL.
14 * You should have received a copy of the LGPL along with this library
15 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
17 * You should have received a copy of the MPL along with this library
18 * in the file COPYING-MPL-1.1
20 * The contents of this file are subject to the Mozilla Public License
21 * Version 1.1 (the "License"); you may not use this file except in
22 * compliance with the License. You may obtain a copy of the License at
23 * http://www.mozilla.org/MPL/
25 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
26 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
27 * the specific language governing rights and limitations.
29 * The Original Code is the cairo graphics library.
31 * The Initial Developer of the Original Code is Adrian Johnson.
34 * Adrian Johnson <ajohnson@redneon.com>
39 #if CAIRO_HAS_FONT_SUBSET
41 #include "cairo-type3-glyph-surface-private.h"
42 #include "cairo-output-stream-private.h"
43 #include "cairo-recording-surface-private.h"
44 #include "cairo-analysis-surface-private.h"
45 #include "cairo-default-context-private.h"
46 #include "cairo-error-private.h"
47 #include "cairo-image-surface-private.h"
48 #include "cairo-surface-clipper-private.h"
50 static const cairo_surface_backend_t cairo_type3_glyph_surface_backend;
53 _cairo_type3_glyph_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper,
54 cairo_path_fixed_t *path,
55 cairo_fill_rule_t fill_rule,
57 cairo_antialias_t antialias)
59 cairo_type3_glyph_surface_t *surface = cairo_container_of (clipper,
60 cairo_type3_glyph_surface_t,
64 _cairo_output_stream_printf (surface->stream, "Q q\n");
65 return CAIRO_STATUS_SUCCESS;
68 return _cairo_pdf_operators_clip (&surface->pdf_operators,
74 _cairo_type3_glyph_surface_create (cairo_scaled_font_t *scaled_font,
75 cairo_output_stream_t *stream,
76 cairo_type3_glyph_surface_emit_image_t emit_image,
77 cairo_scaled_font_subsets_t *font_subsets)
79 cairo_type3_glyph_surface_t *surface;
80 cairo_matrix_t invert_y_axis;
82 if (unlikely (stream != NULL && stream->status))
83 return _cairo_surface_create_in_error (stream->status);
85 surface = malloc (sizeof (cairo_type3_glyph_surface_t));
86 if (unlikely (surface == NULL))
87 return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
89 _cairo_surface_init (&surface->base,
90 &cairo_type3_glyph_surface_backend,
92 CAIRO_CONTENT_COLOR_ALPHA);
94 surface->scaled_font = scaled_font;
95 surface->stream = stream;
96 surface->emit_image = emit_image;
98 /* Setup the transform from the user-font device space to Type 3
99 * font space. The Type 3 font space is defined by the FontMatrix
100 * entry in the Type 3 dictionary. In the PDF backend this is an
101 * identity matrix. */
102 surface->cairo_to_pdf = scaled_font->scale_inverse;
103 cairo_matrix_init_scale (&invert_y_axis, 1, -1);
104 cairo_matrix_multiply (&surface->cairo_to_pdf, &surface->cairo_to_pdf, &invert_y_axis);
106 _cairo_pdf_operators_init (&surface->pdf_operators,
108 &surface->cairo_to_pdf,
111 _cairo_surface_clipper_init (&surface->clipper,
112 _cairo_type3_glyph_surface_clipper_intersect_clip_path);
114 return &surface->base;
117 static cairo_status_t
118 _cairo_type3_glyph_surface_emit_image (cairo_type3_glyph_surface_t *surface,
119 cairo_image_surface_t *image,
120 cairo_matrix_t *image_matrix)
122 cairo_status_t status;
124 /* The only image type supported by Type 3 fonts are 1-bit masks */
125 image = _cairo_image_surface_coerce_to_format (image, CAIRO_FORMAT_A1);
126 status = image->base.status;
127 if (unlikely (status))
130 _cairo_output_stream_printf (surface->stream,
131 "q %f %f %f %f %f %f cm\n",
139 status = surface->emit_image (image, surface->stream);
140 cairo_surface_destroy (&image->base);
142 _cairo_output_stream_printf (surface->stream,
148 static cairo_status_t
149 _cairo_type3_glyph_surface_emit_image_pattern (cairo_type3_glyph_surface_t *surface,
150 cairo_image_surface_t *image,
151 const cairo_matrix_t *pattern_matrix)
153 cairo_matrix_t mat, upside_down;
154 cairo_status_t status;
156 if (image->width == 0 || image->height == 0)
157 return CAIRO_STATUS_SUCCESS;
159 mat = *pattern_matrix;
161 /* Get the pattern space to user space matrix */
162 status = cairo_matrix_invert (&mat);
164 /* cairo_pattern_set_matrix ensures the matrix is invertible */
165 assert (status == CAIRO_STATUS_SUCCESS);
167 /* Make this a pattern space to Type 3 font space matrix */
168 cairo_matrix_multiply (&mat, &mat, &surface->cairo_to_pdf);
170 /* PDF images are in a 1 unit by 1 unit image space. Turn the 1 by
171 * 1 image upside down to convert to flip the Y-axis going from
172 * cairo to PDF. Then scale the image up to the required size. */
173 cairo_matrix_scale (&mat, image->width, image->height);
174 cairo_matrix_init (&upside_down, 1, 0, 0, -1, 0, 1);
175 cairo_matrix_multiply (&mat, &upside_down, &mat);
177 return _cairo_type3_glyph_surface_emit_image (surface, image, &mat);
180 static cairo_status_t
181 _cairo_type3_glyph_surface_finish (void *abstract_surface)
183 cairo_type3_glyph_surface_t *surface = abstract_surface;
185 return _cairo_pdf_operators_fini (&surface->pdf_operators);
188 static cairo_int_status_t
189 _cairo_type3_glyph_surface_paint (void *abstract_surface,
191 const cairo_pattern_t *source,
192 const cairo_clip_t *clip)
194 cairo_type3_glyph_surface_t *surface = abstract_surface;
195 const cairo_surface_pattern_t *pattern;
196 cairo_image_surface_t *image;
198 cairo_status_t status;
200 if (source->type != CAIRO_PATTERN_TYPE_SURFACE)
201 return CAIRO_INT_STATUS_IMAGE_FALLBACK;
203 status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
204 if (unlikely (status))
207 pattern = (const cairo_surface_pattern_t *) source;
208 status = _cairo_surface_acquire_source_image (pattern->surface,
209 &image, &image_extra);
210 if (unlikely (status))
213 status = _cairo_type3_glyph_surface_emit_image_pattern (surface,
215 &pattern->base.matrix);
218 _cairo_surface_release_source_image (pattern->surface, image, image_extra);
223 static cairo_int_status_t
224 _cairo_type3_glyph_surface_mask (void *abstract_surface,
226 const cairo_pattern_t *source,
227 const cairo_pattern_t *mask,
228 const cairo_clip_t *clip)
230 return _cairo_type3_glyph_surface_paint (abstract_surface,
235 static cairo_int_status_t
236 _cairo_type3_glyph_surface_stroke (void *abstract_surface,
238 const cairo_pattern_t *source,
239 const cairo_path_fixed_t *path,
240 const cairo_stroke_style_t *style,
241 const cairo_matrix_t *ctm,
242 const cairo_matrix_t *ctm_inverse,
244 cairo_antialias_t antialias,
245 const cairo_clip_t *clip)
247 cairo_type3_glyph_surface_t *surface = abstract_surface;
248 cairo_int_status_t status;
250 status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
251 if (unlikely (status))
254 return _cairo_pdf_operators_stroke (&surface->pdf_operators,
261 static cairo_int_status_t
262 _cairo_type3_glyph_surface_fill (void *abstract_surface,
264 const cairo_pattern_t *source,
265 const cairo_path_fixed_t *path,
266 cairo_fill_rule_t fill_rule,
268 cairo_antialias_t antialias,
269 const cairo_clip_t *clip)
271 cairo_type3_glyph_surface_t *surface = abstract_surface;
272 cairo_int_status_t status;
274 status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
275 if (unlikely (status))
278 return _cairo_pdf_operators_fill (&surface->pdf_operators,
283 static cairo_int_status_t
284 _cairo_type3_glyph_surface_show_glyphs (void *abstract_surface,
286 const cairo_pattern_t *source,
287 cairo_glyph_t *glyphs,
289 cairo_scaled_font_t *scaled_font,
290 const cairo_clip_t *clip)
292 cairo_type3_glyph_surface_t *surface = abstract_surface;
293 cairo_int_status_t status;
294 cairo_scaled_font_t *font;
295 cairo_matrix_t new_ctm, invert_y_axis;
297 status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
298 if (unlikely (status))
301 cairo_matrix_init_scale (&invert_y_axis, 1, -1);
302 cairo_matrix_multiply (&new_ctm, &invert_y_axis, &scaled_font->ctm);
303 cairo_matrix_multiply (&new_ctm, &surface->cairo_to_pdf, &new_ctm);
304 font = cairo_scaled_font_create (scaled_font->font_face,
305 &scaled_font->font_matrix,
307 &scaled_font->options);
308 if (unlikely (font->status))
311 status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators,
318 cairo_scaled_font_destroy (font);
323 static const cairo_surface_backend_t cairo_type3_glyph_surface_backend = {
324 CAIRO_INTERNAL_SURFACE_TYPE_TYPE3_GLYPH,
325 _cairo_type3_glyph_surface_finish,
327 _cairo_default_context_create, /* XXX usable through a context? */
329 NULL, /* create similar */
330 NULL, /* create similar image */
331 NULL, /* map to image */
332 NULL, /* unmap image */
335 NULL, /* acquire_source_image */
336 NULL, /* release_source_image */
339 NULL, /* copy page */
340 NULL, /* show page */
342 NULL, /* _cairo_type3_glyph_surface_get_extents */
343 NULL, /* _cairo_type3_glyph_surface_get_font_options */
346 NULL, /* mark_dirty_rectangle */
348 _cairo_type3_glyph_surface_paint,
349 _cairo_type3_glyph_surface_mask,
350 _cairo_type3_glyph_surface_stroke,
351 _cairo_type3_glyph_surface_fill,
352 NULL, /* fill-stroke */
353 _cairo_type3_glyph_surface_show_glyphs,
357 _cairo_type3_glyph_surface_set_stream (cairo_type3_glyph_surface_t *surface,
358 cairo_output_stream_t *stream)
360 surface->stream = stream;
361 _cairo_pdf_operators_set_stream (&surface->pdf_operators, stream);
364 static cairo_status_t
365 _cairo_type3_glyph_surface_emit_fallback_image (cairo_type3_glyph_surface_t *surface,
366 unsigned long glyph_index)
368 cairo_scaled_glyph_t *scaled_glyph;
369 cairo_status_t status;
370 cairo_image_surface_t *image;
374 status = _cairo_scaled_glyph_lookup (surface->scaled_font,
376 CAIRO_SCALED_GLYPH_INFO_METRICS |
377 CAIRO_SCALED_GLYPH_INFO_SURFACE,
379 if (unlikely (status))
382 image = scaled_glyph->surface;
383 if (image->width == 0 || image->height == 0)
384 return CAIRO_STATUS_SUCCESS;
386 x = _cairo_fixed_to_double (scaled_glyph->bbox.p1.x);
387 y = _cairo_fixed_to_double (scaled_glyph->bbox.p2.y);
388 mat.xx = image->width;
391 mat.yy = image->height;
394 cairo_matrix_multiply (&mat, &mat, &surface->scaled_font->scale_inverse);
397 return _cairo_type3_glyph_surface_emit_image (surface, image, &mat);
401 _cairo_type3_glyph_surface_set_font_subsets_callback (void *abstract_surface,
402 cairo_pdf_operators_use_font_subset_t use_font_subset,
405 cairo_type3_glyph_surface_t *surface = abstract_surface;
407 if (unlikely (surface->base.status))
410 _cairo_pdf_operators_set_font_subsets_callback (&surface->pdf_operators,
416 _cairo_type3_glyph_surface_analyze_glyph (void *abstract_surface,
417 unsigned long glyph_index)
419 cairo_type3_glyph_surface_t *surface = abstract_surface;
420 cairo_scaled_glyph_t *scaled_glyph;
421 cairo_int_status_t status, status2;
422 cairo_output_stream_t *null_stream;
424 if (unlikely (surface->base.status))
425 return surface->base.status;
427 null_stream = _cairo_null_stream_create ();
428 if (unlikely (null_stream->status))
429 return null_stream->status;
431 _cairo_type3_glyph_surface_set_stream (surface, null_stream);
433 _cairo_scaled_font_freeze_cache (surface->scaled_font);
434 status = _cairo_scaled_glyph_lookup (surface->scaled_font,
436 CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE,
439 if (_cairo_int_status_is_error (status))
442 if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
443 status = CAIRO_INT_STATUS_SUCCESS;
447 status = _cairo_recording_surface_replay (scaled_glyph->recording_surface,
449 if (unlikely (status))
452 status = _cairo_pdf_operators_flush (&surface->pdf_operators);
453 if (status == CAIRO_INT_STATUS_IMAGE_FALLBACK)
454 status = CAIRO_INT_STATUS_SUCCESS;
457 _cairo_scaled_font_thaw_cache (surface->scaled_font);
459 status2 = _cairo_output_stream_destroy (null_stream);
460 if (status == CAIRO_INT_STATUS_SUCCESS)
467 _cairo_type3_glyph_surface_emit_glyph (void *abstract_surface,
468 cairo_output_stream_t *stream,
469 unsigned long glyph_index,
473 cairo_type3_glyph_surface_t *surface = abstract_surface;
474 cairo_scaled_glyph_t *scaled_glyph;
475 cairo_int_status_t status, status2;
476 double x_advance, y_advance;
477 cairo_matrix_t font_matrix_inverse;
479 if (unlikely (surface->base.status))
480 return surface->base.status;
482 _cairo_type3_glyph_surface_set_stream (surface, stream);
484 _cairo_scaled_font_freeze_cache (surface->scaled_font);
485 status = _cairo_scaled_glyph_lookup (surface->scaled_font,
487 CAIRO_SCALED_GLYPH_INFO_METRICS |
488 CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE,
490 if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
491 status = _cairo_scaled_glyph_lookup (surface->scaled_font,
493 CAIRO_SCALED_GLYPH_INFO_METRICS,
495 if (status == CAIRO_INT_STATUS_SUCCESS)
496 status = CAIRO_INT_STATUS_IMAGE_FALLBACK;
498 if (_cairo_int_status_is_error (status)) {
499 _cairo_scaled_font_thaw_cache (surface->scaled_font);
503 x_advance = scaled_glyph->metrics.x_advance;
504 y_advance = scaled_glyph->metrics.y_advance;
505 font_matrix_inverse = surface->scaled_font->font_matrix;
506 status2 = cairo_matrix_invert (&font_matrix_inverse);
508 /* The invertability of font_matrix is tested in
509 * pdf_operators_show_glyphs before any glyphs are mapped to the
511 assert (status2 == CAIRO_INT_STATUS_SUCCESS);
513 cairo_matrix_transform_distance (&font_matrix_inverse, &x_advance, &y_advance);
516 *bbox = scaled_glyph->bbox;
517 _cairo_matrix_transform_bounding_box_fixed (&surface->scaled_font->scale_inverse,
520 _cairo_output_stream_printf (surface->stream,
521 "%f 0 %f %f %f %f d1\n",
523 _cairo_fixed_to_double (bbox->p1.x),
524 - _cairo_fixed_to_double (bbox->p2.y),
525 _cairo_fixed_to_double (bbox->p2.x),
526 - _cairo_fixed_to_double (bbox->p1.y));
528 if (status == CAIRO_INT_STATUS_SUCCESS) {
529 cairo_output_stream_t *mem_stream;
531 mem_stream = _cairo_memory_stream_create ();
532 status = mem_stream->status;
533 if (unlikely (status))
536 _cairo_type3_glyph_surface_set_stream (surface, mem_stream);
538 _cairo_output_stream_printf (surface->stream, "q\n");
539 status = _cairo_recording_surface_replay (scaled_glyph->recording_surface,
542 status2 = _cairo_pdf_operators_flush (&surface->pdf_operators);
543 if (status == CAIRO_INT_STATUS_SUCCESS)
546 _cairo_output_stream_printf (surface->stream, "Q\n");
548 _cairo_type3_glyph_surface_set_stream (surface, stream);
549 if (status == CAIRO_INT_STATUS_SUCCESS)
550 _cairo_memory_stream_copy (mem_stream, stream);
552 status2 = _cairo_output_stream_destroy (mem_stream);
553 if (status == CAIRO_INT_STATUS_SUCCESS)
557 if (status == CAIRO_INT_STATUS_IMAGE_FALLBACK)
558 status = _cairo_type3_glyph_surface_emit_fallback_image (surface, glyph_index);
561 _cairo_scaled_font_thaw_cache (surface->scaled_font);
566 #endif /* CAIRO_HAS_FONT_SUBSET */