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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2008 Adrian Johnson
*
* 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, 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
*
* 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 Adrian Johnson.
*
* Contributor(s):
* Adrian Johnson <ajohnson@redneon.com>
*/
#include "cairoint.h"
#if CAIRO_HAS_FONT_SUBSET
#include "cairo-type3-glyph-surface-private.h"
#include "cairo-output-stream-private.h"
#include "cairo-recording-surface-private.h"
#include "cairo-analysis-surface-private.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-surface-clipper-private.h"
static const cairo_surface_backend_t cairo_type3_glyph_surface_backend;
static cairo_status_t
_cairo_type3_glyph_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_type3_glyph_surface_t *surface = cairo_container_of (clipper,
cairo_type3_glyph_surface_t,
clipper);
if (path == NULL) {
_cairo_output_stream_printf (surface->stream, "Q q\n");
return CAIRO_STATUS_SUCCESS;
}
return _cairo_pdf_operators_clip (&surface->pdf_operators,
path,
fill_rule);
}
cairo_surface_t *
_cairo_type3_glyph_surface_create (cairo_scaled_font_t *scaled_font,
cairo_output_stream_t *stream,
cairo_type3_glyph_surface_emit_image_t emit_image,
cairo_scaled_font_subsets_t *font_subsets,
cairo_bool_t ps)
{
cairo_type3_glyph_surface_t *surface;
if (unlikely (stream != NULL && stream->status))
return _cairo_surface_create_in_error (stream->status);
surface = _cairo_malloc (sizeof (cairo_type3_glyph_surface_t));
if (unlikely (surface == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_cairo_surface_init (&surface->base,
&cairo_type3_glyph_surface_backend,
NULL, /* device */
CAIRO_CONTENT_COLOR_ALPHA,
TRUE); /* is_vector */
surface->scaled_font = scaled_font;
surface->stream = stream;
surface->emit_image = emit_image;
/* Setup the transform from the user-font device space to Type 3
* font space. The Type 3 font space is defined by the FontMatrix
* entry in the Type 3 dictionary. In the PDF backend this is an
* identity matrix. */
surface->cairo_to_pdf = scaled_font->scale_inverse;
_cairo_pdf_operators_init (&surface->pdf_operators,
surface->stream,
&surface->cairo_to_pdf,
font_subsets,
ps);
_cairo_surface_clipper_init (&surface->clipper,
_cairo_type3_glyph_surface_clipper_intersect_clip_path);
return &surface->base;
}
static cairo_status_t
_cairo_type3_glyph_surface_emit_image (cairo_type3_glyph_surface_t *surface,
cairo_image_surface_t *image,
cairo_matrix_t *image_matrix)
{
cairo_status_t status;
/* The only image type supported by Type 3 fonts are 1-bit masks */
image = _cairo_image_surface_coerce_to_format (image, CAIRO_FORMAT_A1);
status = image->base.status;
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->stream,
"q %f %f %f %f %f %f cm\n",
image_matrix->xx,
image_matrix->xy,
image_matrix->yx,
image_matrix->yy,
image_matrix->x0,
image_matrix->y0);
status = surface->emit_image (image, surface->stream);
cairo_surface_destroy (&image->base);
_cairo_output_stream_printf (surface->stream,
"Q\n");
return status;
}
static cairo_status_t
_cairo_type3_glyph_surface_emit_image_pattern (cairo_type3_glyph_surface_t *surface,
cairo_image_surface_t *image,
const cairo_matrix_t *pattern_matrix)
{
cairo_matrix_t mat, upside_down;
cairo_status_t status;
if (image->width == 0 || image->height == 0)
return CAIRO_STATUS_SUCCESS;
mat = *pattern_matrix;
/* Get the pattern space to user space matrix */
status = cairo_matrix_invert (&mat);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
/* Make this a pattern space to Type 3 font space matrix */
cairo_matrix_multiply (&mat, &mat, &surface->cairo_to_pdf);
/* PDF images are in a 1 unit by 1 unit image space. Turn the 1 by
* 1 image upside down to convert to flip the Y-axis going from
* cairo to PDF. Then scale the image up to the required size. */
cairo_matrix_scale (&mat, image->width, image->height);
cairo_matrix_init (&upside_down, 1, 0, 0, -1, 0, 1);
cairo_matrix_multiply (&mat, &upside_down, &mat);
return _cairo_type3_glyph_surface_emit_image (surface, image, &mat);
}
static cairo_status_t
_cairo_type3_glyph_surface_finish (void *abstract_surface)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
return _cairo_pdf_operators_fini (&surface->pdf_operators);
}
static cairo_int_status_t
_cairo_type3_glyph_surface_paint (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
const cairo_surface_pattern_t *pattern;
cairo_image_surface_t *image;
void *image_extra;
cairo_status_t status;
if (source->type != CAIRO_PATTERN_TYPE_SURFACE)
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
pattern = (const cairo_surface_pattern_t *) source;
status = _cairo_surface_acquire_source_image (pattern->surface,
&image, &image_extra);
if (unlikely (status))
goto fail;
status = _cairo_type3_glyph_surface_emit_image_pattern (surface,
image,
&pattern->base.matrix);
fail:
_cairo_surface_release_source_image (pattern->surface, image, image_extra);
return status;
}
static cairo_int_status_t
_cairo_type3_glyph_surface_mask (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_clip_t *clip)
{
return _cairo_type3_glyph_surface_paint (abstract_surface,
op, mask,
clip);
}
static cairo_int_status_t
_cairo_type3_glyph_surface_stroke (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
cairo_int_status_t status;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
return _cairo_pdf_operators_stroke (&surface->pdf_operators,
path,
style,
ctm,
ctm_inverse);
}
static cairo_int_status_t
_cairo_type3_glyph_surface_fill (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
cairo_int_status_t status;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
return _cairo_pdf_operators_fill (&surface->pdf_operators,
path,
fill_rule);
}
static cairo_int_status_t
_cairo_type3_glyph_surface_show_glyphs (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
cairo_int_status_t status;
cairo_scaled_font_t *font;
cairo_matrix_t new_ctm;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
cairo_matrix_multiply (&new_ctm, &surface->cairo_to_pdf, &scaled_font->ctm);
font = cairo_scaled_font_create (scaled_font->font_face,
&scaled_font->font_matrix,
&new_ctm,
&scaled_font->options);
if (unlikely (font->status))
return font->status;
status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators,
NULL, 0,
glyphs, num_glyphs,
NULL, 0,
FALSE,
font);
cairo_scaled_font_destroy (font);
return status;
}
static const cairo_surface_backend_t cairo_type3_glyph_surface_backend = {
CAIRO_INTERNAL_SURFACE_TYPE_TYPE3_GLYPH,
_cairo_type3_glyph_surface_finish,
_cairo_default_context_create, /* XXX usable through a context? */
NULL, /* create similar */
NULL, /* create similar image */
NULL, /* map to image */
NULL, /* unmap image */
NULL, /* source */
NULL, /* acquire_source_image */
NULL, /* release_source_image */
NULL, /* snapshot */
NULL, /* copy page */
NULL, /* show page */
NULL, /* _cairo_type3_glyph_surface_get_extents */
NULL, /* _cairo_type3_glyph_surface_get_font_options */
NULL, /* flush */
NULL, /* mark_dirty_rectangle */
_cairo_type3_glyph_surface_paint,
_cairo_type3_glyph_surface_mask,
_cairo_type3_glyph_surface_stroke,
_cairo_type3_glyph_surface_fill,
NULL, /* fill-stroke */
_cairo_type3_glyph_surface_show_glyphs,
};
static void
_cairo_type3_glyph_surface_set_stream (cairo_type3_glyph_surface_t *surface,
cairo_output_stream_t *stream)
{
surface->stream = stream;
_cairo_pdf_operators_set_stream (&surface->pdf_operators, stream);
}
static cairo_status_t
_cairo_type3_glyph_surface_emit_fallback_image (cairo_type3_glyph_surface_t *surface,
unsigned long glyph_index)
{
cairo_scaled_glyph_t *scaled_glyph;
cairo_status_t status;
cairo_image_surface_t *image;
cairo_matrix_t mat;
double x, y;
status = _cairo_scaled_glyph_lookup (surface->scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS |
CAIRO_SCALED_GLYPH_INFO_SURFACE,
&scaled_glyph);
if (unlikely (status))
return status;
image = scaled_glyph->surface;
if (image->width == 0 || image->height == 0)
return CAIRO_STATUS_SUCCESS;
x = _cairo_fixed_to_double (scaled_glyph->bbox.p1.x);
y = _cairo_fixed_to_double (scaled_glyph->bbox.p2.y);
cairo_matrix_init(&mat, image->width, 0,
0, -image->height,
x, y);
cairo_matrix_multiply (&mat, &mat, &surface->scaled_font->scale_inverse);
return _cairo_type3_glyph_surface_emit_image (surface, image, &mat);
}
void
_cairo_type3_glyph_surface_set_font_subsets_callback (void *abstract_surface,
cairo_pdf_operators_use_font_subset_t use_font_subset,
void *closure)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
if (unlikely (surface->base.status))
return;
_cairo_pdf_operators_set_font_subsets_callback (&surface->pdf_operators,
use_font_subset,
closure);
}
cairo_status_t
_cairo_type3_glyph_surface_analyze_glyph (void *abstract_surface,
unsigned long glyph_index)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
cairo_scaled_glyph_t *scaled_glyph;
cairo_int_status_t status, status2;
cairo_output_stream_t *null_stream;
if (unlikely (surface->base.status))
return surface->base.status;
null_stream = _cairo_null_stream_create ();
if (unlikely (null_stream->status))
return null_stream->status;
_cairo_type3_glyph_surface_set_stream (surface, null_stream);
_cairo_scaled_font_freeze_cache (surface->scaled_font);
status = _cairo_scaled_glyph_lookup (surface->scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE,
&scaled_glyph);
if (_cairo_int_status_is_error (status))
goto cleanup;
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
status = CAIRO_INT_STATUS_SUCCESS;
goto cleanup;
}
status = _cairo_recording_surface_replay (scaled_glyph->recording_surface,
&surface->base);
if (unlikely (status))
goto cleanup;
status = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (status == CAIRO_INT_STATUS_IMAGE_FALLBACK)
status = CAIRO_INT_STATUS_SUCCESS;
cleanup:
_cairo_scaled_font_thaw_cache (surface->scaled_font);
status2 = _cairo_output_stream_destroy (null_stream);
if (status == CAIRO_INT_STATUS_SUCCESS)
status = status2;
return status;
}
cairo_status_t
_cairo_type3_glyph_surface_emit_glyph (void *abstract_surface,
cairo_output_stream_t *stream,
unsigned long glyph_index,
cairo_box_t *bbox,
double *width)
{
cairo_type3_glyph_surface_t *surface = abstract_surface;
cairo_scaled_glyph_t *scaled_glyph;
cairo_int_status_t status, status2;
double x_advance, y_advance;
cairo_matrix_t font_matrix_inverse;
if (unlikely (surface->base.status))
return surface->base.status;
_cairo_type3_glyph_surface_set_stream (surface, stream);
_cairo_scaled_font_freeze_cache (surface->scaled_font);
status = _cairo_scaled_glyph_lookup (surface->scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS |
CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE,
&scaled_glyph);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
status = _cairo_scaled_glyph_lookup (surface->scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS,
&scaled_glyph);
if (status == CAIRO_INT_STATUS_SUCCESS)
status = CAIRO_INT_STATUS_IMAGE_FALLBACK;
}
if (_cairo_int_status_is_error (status)) {
_cairo_scaled_font_thaw_cache (surface->scaled_font);
return status;
}
x_advance = scaled_glyph->metrics.x_advance;
y_advance = scaled_glyph->metrics.y_advance;
font_matrix_inverse = surface->scaled_font->font_matrix;
status2 = cairo_matrix_invert (&font_matrix_inverse);
/* The invertability of font_matrix is tested in
* pdf_operators_show_glyphs before any glyphs are mapped to the
* subset. */
assert (status2 == CAIRO_INT_STATUS_SUCCESS);
cairo_matrix_transform_distance (&font_matrix_inverse, &x_advance, &y_advance);
*width = x_advance;
*bbox = scaled_glyph->bbox;
_cairo_matrix_transform_bounding_box_fixed (&surface->scaled_font->scale_inverse,
bbox, NULL);
_cairo_output_stream_printf (surface->stream,
"%f 0 %f %f %f %f d1\n",
x_advance,
_cairo_fixed_to_double (bbox->p1.x),
_cairo_fixed_to_double (bbox->p1.y),
_cairo_fixed_to_double (bbox->p2.x),
_cairo_fixed_to_double (bbox->p2.y));
if (status == CAIRO_INT_STATUS_SUCCESS) {
cairo_output_stream_t *mem_stream;
mem_stream = _cairo_memory_stream_create ();
status = mem_stream->status;
if (unlikely (status))
goto FAIL;
_cairo_type3_glyph_surface_set_stream (surface, mem_stream);
_cairo_output_stream_printf (surface->stream, "q\n");
status = _cairo_recording_surface_replay (scaled_glyph->recording_surface,
&surface->base);
status2 = _cairo_pdf_operators_flush (&surface->pdf_operators);
if (status == CAIRO_INT_STATUS_SUCCESS)
status = status2;
_cairo_output_stream_printf (surface->stream, "Q\n");
_cairo_type3_glyph_surface_set_stream (surface, stream);
if (status == CAIRO_INT_STATUS_SUCCESS)
_cairo_memory_stream_copy (mem_stream, stream);
status2 = _cairo_output_stream_destroy (mem_stream);
if (status == CAIRO_INT_STATUS_SUCCESS)
status = status2;
}
if (status == CAIRO_INT_STATUS_IMAGE_FALLBACK)
status = _cairo_type3_glyph_surface_emit_fallback_image (surface, glyph_index);
FAIL:
_cairo_scaled_font_thaw_cache (surface->scaled_font);
return status;
}
#endif /* CAIRO_HAS_FONT_SUBSET */