/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */ /* cairo - a vector graphics library with display and print output * * Copyright © 2003 University of Southern California * Copyright © 2005 Red Hat, Inc * Copyright © 2007,2008 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., 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 * Kristian Høgsberg * Keith Packard * Adrian Johnson */ /* * Design of the PS output: * * The PS output is harmonised with the PDF operations using PS procedures * to emulate the PDF operators. * * This has a number of advantages: * 1. A large chunk of code is shared between the PDF and PS backends. * See cairo-pdf-operators. * 2. Using gs to do PS -> PDF and PDF -> PS will always work well. */ #define _BSD_SOURCE /* for ctime_r(), snprintf(), strdup() */ #include "cairoint.h" #include "cairo-ps.h" #include "cairo-ps-surface-private.h" #include "cairo-pdf-operators-private.h" #include "cairo-scaled-font-subsets-private.h" #include "cairo-paginated-private.h" #include "cairo-meta-surface-private.h" #include "cairo-output-stream-private.h" #include "cairo-type3-glyph-surface-private.h" #include #include #include #include #include #define DEBUG_PS 0 #ifndef HAVE_CTIME_R #define ctime_r(T, BUF) ctime (T) #endif static const cairo_surface_backend_t cairo_ps_surface_backend; static const cairo_paginated_surface_backend_t cairo_ps_surface_paginated_backend; static const cairo_ps_level_t _cairo_ps_levels[] = { CAIRO_PS_LEVEL_2, CAIRO_PS_LEVEL_3 }; #define CAIRO_PS_LEVEL_LAST ARRAY_LENGTH (_cairo_ps_levels) static const char * _cairo_ps_level_strings[CAIRO_PS_LEVEL_LAST] = { "PS Level 2", "PS Level 3" }; static void _cairo_ps_surface_emit_header (cairo_ps_surface_t *surface) { char ctime_buf[26]; time_t now; char **comments; int i, num_comments; int level; const char *eps_header = ""; if (surface->has_creation_date) now = surface->creation_date; else now = time (NULL); if (surface->ps_level_used == CAIRO_PS_LEVEL_2) level = 2; else level = 3; if (surface->eps) eps_header = " EPSF-3.0"; _cairo_output_stream_printf (surface->final_stream, "%%!PS-Adobe-3.0%s\n" "%%%%Creator: cairo %s (http://cairographics.org)\n" "%%%%CreationDate: %s" "%%%%Pages: %d\n" "%%%%BoundingBox: %d %d %d %d\n", eps_header, cairo_version_string (), ctime_r (&now, ctime_buf), surface->num_pages, surface->bbox_x1, surface->bbox_y1, surface->bbox_x2, surface->bbox_y2); _cairo_output_stream_printf (surface->final_stream, "%%%%DocumentData: Clean7Bit\n" "%%%%LanguageLevel: %d\n", level); num_comments = _cairo_array_num_elements (&surface->dsc_header_comments); comments = _cairo_array_index (&surface->dsc_header_comments, 0); for (i = 0; i < num_comments; i++) { _cairo_output_stream_printf (surface->final_stream, "%s\n", comments[i]); free (comments[i]); comments[i] = NULL; } _cairo_output_stream_printf (surface->final_stream, "%%%%EndComments\n"); _cairo_output_stream_printf (surface->final_stream, "%%%%BeginProlog\n"); if (surface->eps) { _cairo_output_stream_printf (surface->final_stream, "/cairo_eps_state save def\n" "/dict_count countdictstack def\n" "/op_count count 1 sub def\n" "userdict begin\n"); } else { _cairo_output_stream_printf (surface->final_stream, "/languagelevel where\n" "{ pop languagelevel } { 1 } ifelse\n" "%d lt { /Helvetica findfont 12 scalefont setfont 50 500 moveto\n" " (This print job requires a PostScript Language Level %d printer.) show\n" " showpage quit } if\n", level, level); } _cairo_output_stream_printf (surface->final_stream, "/q { gsave } bind def\n" "/Q { grestore } bind def\n" "/cm { 6 array astore concat } bind def\n" "/w { setlinewidth } bind def\n" "/J { setlinecap } bind def\n" "/j { setlinejoin } bind def\n" "/M { setmiterlimit } bind def\n" "/d { setdash } bind def\n" "/m { moveto } bind def\n" "/l { lineto } bind def\n" "/c { curveto } bind def\n" "/h { closepath } bind def\n" "/re { exch dup neg 3 1 roll 5 3 roll moveto 0 rlineto\n" " 0 exch rlineto 0 rlineto closepath } bind def\n" "/S { stroke } bind def\n" "/f { fill } bind def\n" "/f* { eofill } bind def\n" "/B { fill stroke } bind def\n" "/B* { eofill stroke } bind def\n" "/n { newpath } bind def\n" "/W { clip } bind def\n" "/W* { eoclip } bind def\n" "/BT { } bind def\n" "/ET { } bind def\n" "/pdfmark where { pop globaldict /?pdfmark /exec load put }\n" " { globaldict begin /?pdfmark /pop load def /pdfmark\n" " /cleartomark load def end } ifelse\n" "/BDC { mark 3 1 roll /BDC pdfmark } bind def\n" "/EMC { mark /EMC pdfmark } bind def\n" "/cairo_store_point { /cairo_point_y exch def /cairo_point_x exch def } def\n" "/Tj { show currentpoint cairo_store_point } bind def\n" "/TJ {\n" " {\n" " dup\n" " type /stringtype eq\n" " { show } { -0.001 mul 0 cairo_font_matrix dtransform rmoveto } ifelse\n" " } forall\n" " currentpoint cairo_store_point\n" "} bind def\n" "/cairo_selectfont { cairo_font_matrix aload pop pop pop 0 0 6 array astore\n" " cairo_font exch selectfont cairo_point_x cairo_point_y moveto } bind def\n" "/Tf { pop /cairo_font exch def /cairo_font_matrix where\n" " { pop cairo_selectfont } if } bind def\n" "/Td { matrix translate cairo_font_matrix matrix concatmatrix dup\n" " /cairo_font_matrix exch def dup 4 get exch 5 get cairo_store_point\n" " /cairo_font where { pop cairo_selectfont } if } bind def\n" "/Tm { 2 copy 8 2 roll 6 array astore /cairo_font_matrix exch def\n" " cairo_store_point /cairo_font where { pop cairo_selectfont } if } bind def\n" "/g { setgray } bind def\n" "/rg { setrgbcolor } bind def\n" "/d1 { setcachedevice } bind def\n"); _cairo_output_stream_printf (surface->final_stream, "%%%%EndProlog\n"); num_comments = _cairo_array_num_elements (&surface->dsc_setup_comments); if (num_comments) { _cairo_output_stream_printf (surface->final_stream, "%%%%BeginSetup\n"); comments = _cairo_array_index (&surface->dsc_setup_comments, 0); for (i = 0; i < num_comments; i++) { _cairo_output_stream_printf (surface->final_stream, "%s\n", comments[i]); free (comments[i]); comments[i] = NULL; } _cairo_output_stream_printf (surface->final_stream, "%%%%EndSetup\n"); } } #if CAIRO_HAS_FT_FONT static cairo_status_t _cairo_ps_surface_emit_type1_font_subset (cairo_ps_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_type1_subset_t subset; cairo_status_t status; int length; char name[64]; snprintf (name, sizeof name, "f-%d-%d", font_subset->font_id, font_subset->subset_id); status = _cairo_type1_subset_init (&subset, name, font_subset, TRUE); if (status) return status; /* FIXME: Figure out document structure convention for fonts */ #if DEBUG_PS _cairo_output_stream_printf (surface->final_stream, "%% _cairo_ps_surface_emit_type1_font_subset\n"); #endif length = subset.header_length + subset.data_length + subset.trailer_length; _cairo_output_stream_write (surface->final_stream, subset.data, length); _cairo_type1_subset_fini (&subset); return CAIRO_STATUS_SUCCESS; } #endif static cairo_status_t _cairo_ps_surface_emit_type1_font_fallback (cairo_ps_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_type1_subset_t subset; cairo_status_t status; int length; char name[64]; snprintf (name, sizeof name, "f-%d-%d", font_subset->font_id, font_subset->subset_id); status = _cairo_type1_fallback_init_hex (&subset, name, font_subset); if (status) return status; /* FIXME: Figure out document structure convention for fonts */ #if DEBUG_PS _cairo_output_stream_printf (surface->final_stream, "%% _cairo_ps_surface_emit_type1_font_fallback\n"); #endif length = subset.header_length + subset.data_length + subset.trailer_length; _cairo_output_stream_write (surface->final_stream, subset.data, length); _cairo_type1_fallback_fini (&subset); return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_truetype_font_subset (cairo_ps_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_truetype_subset_t subset; cairo_status_t status; unsigned int i, begin, end; status = _cairo_truetype_subset_init (&subset, font_subset); if (status) return status; /* FIXME: Figure out document structure convention for fonts */ #if DEBUG_PS _cairo_output_stream_printf (surface->final_stream, "%% _cairo_ps_surface_emit_truetype_font_subset\n"); #endif _cairo_output_stream_printf (surface->final_stream, "11 dict begin\n" "/FontType 42 def\n" "/FontName /f-%d-%d def\n" "/PaintType 0 def\n" "/FontMatrix [ 1 0 0 1 0 0 ] def\n" "/FontBBox [ 0 0 0 0 ] def\n" "/Encoding 256 array def\n" "0 1 255 { Encoding exch /.notdef put } for\n", font_subset->font_id, font_subset->subset_id); /* FIXME: Figure out how subset->x_max etc maps to the /FontBBox */ for (i = 1; i < font_subset->num_glyphs; i++) { if (font_subset->glyph_names != NULL) { _cairo_output_stream_printf (surface->final_stream, "Encoding %d /%s put\n", i, font_subset->glyph_names[i]); } else { _cairo_output_stream_printf (surface->final_stream, "Encoding %d /g%d put\n", i, i); } } _cairo_output_stream_printf (surface->final_stream, "/CharStrings %d dict dup begin\n" "/.notdef 0 def\n", font_subset->num_glyphs); for (i = 1; i < font_subset->num_glyphs; i++) { if (font_subset->glyph_names != NULL) { _cairo_output_stream_printf (surface->final_stream, "/%s %d def\n", font_subset->glyph_names[i], i); } else { _cairo_output_stream_printf (surface->final_stream, "/g%d %d def\n", i, i); } } _cairo_output_stream_printf (surface->final_stream, "end readonly def\n"); _cairo_output_stream_printf (surface->final_stream, "/sfnts [\n"); begin = 0; end = 0; for (i = 0; i < subset.num_string_offsets; i++) { end = subset.string_offsets[i]; _cairo_output_stream_printf (surface->final_stream,"<"); _cairo_output_stream_write_hex_string (surface->final_stream, subset.data + begin, end - begin); _cairo_output_stream_printf (surface->final_stream,"00>\n"); begin = end; } if (subset.data_length > end) { _cairo_output_stream_printf (surface->final_stream,"<"); _cairo_output_stream_write_hex_string (surface->final_stream, subset.data + end, subset.data_length - end); _cairo_output_stream_printf (surface->final_stream,"00>\n"); } _cairo_output_stream_printf (surface->final_stream, "] def\n" "FontName currentdict end definefont pop\n"); _cairo_truetype_subset_fini (&subset); return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_emit_imagemask (cairo_image_surface_t *image, cairo_output_stream_t *stream) { uint8_t *row, *byte; int rows, cols; /* The only image type supported by Type 3 fonts are 1-bit image * masks */ assert (image->format == CAIRO_FORMAT_A1); _cairo_output_stream_printf (stream, "<<\n" " /ImageType 1\n" " /Width %d\n" " /Height %d\n" " /ImageMatrix [%d 0 0 %d 0 %d]\n" " /Decode [1 0]\n" " /BitsPerComponent 1\n", image->width, image->height, image->width, -image->height, image->height); _cairo_output_stream_printf (stream, " /DataSource {<\n "); for (row = image->data, rows = image->height; rows; row += image->stride, rows--) { for (byte = row, cols = (image->width + 7) / 8; cols; byte++, cols--) { uint8_t output_byte = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (*byte); _cairo_output_stream_printf (stream, "%02x ", output_byte); } _cairo_output_stream_printf (stream, "\n "); } _cairo_output_stream_printf (stream, ">}\n>>\n"); _cairo_output_stream_printf (stream, "imagemask\n"); return _cairo_output_stream_get_status (stream); } static cairo_status_t _cairo_ps_surface_analyze_user_font_subset (cairo_scaled_font_subset_t *font_subset, void *closure) { cairo_ps_surface_t *surface = closure; cairo_status_t status = CAIRO_STATUS_SUCCESS; unsigned int i; cairo_surface_t *type3_surface; type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font, NULL, _cairo_ps_emit_imagemask, surface->font_subsets); for (i = 0; i < font_subset->num_glyphs; i++) { status = _cairo_type3_glyph_surface_analyze_glyph (type3_surface, font_subset->glyphs[i]); if (status) break; } cairo_surface_destroy (type3_surface); return status; } static cairo_status_t _cairo_ps_surface_emit_type3_font_subset (cairo_ps_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_status_t status; unsigned int i; cairo_box_t font_bbox = {{0,0},{0,0}}; cairo_box_t bbox = {{0,0},{0,0}}; cairo_surface_t *type3_surface; double width; if (font_subset->num_glyphs == 0) return CAIRO_STATUS_SUCCESS; #if DEBUG_PS _cairo_output_stream_printf (surface->final_stream, "%% _cairo_ps_surface_emit_type3_font_subset\n"); #endif _cairo_output_stream_printf (surface->final_stream, "8 dict begin\n" "/FontType 3 def\n" "/FontMatrix [1 0 0 1 0 0] def\n" "/Encoding 256 array def\n" "0 1 255 { Encoding exch /.notdef put } for\n"); type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font, NULL, _cairo_ps_emit_imagemask, surface->font_subsets); for (i = 0; i < font_subset->num_glyphs; i++) { if (font_subset->glyph_names != NULL) { _cairo_output_stream_printf (surface->final_stream, "Encoding %d /%s put\n", i, font_subset->glyph_names[i]); } else { _cairo_output_stream_printf (surface->final_stream, "Encoding %d /g%d put\n", i, i); } } _cairo_output_stream_printf (surface->final_stream, "/Glyphs [\n"); for (i = 0; i < font_subset->num_glyphs; i++) { _cairo_output_stream_printf (surface->final_stream, " { %% %d\n", i); status = _cairo_type3_glyph_surface_emit_glyph (type3_surface, surface->final_stream, font_subset->glyphs[i], &bbox, &width); if (status) break; _cairo_output_stream_printf (surface->final_stream, " }\n"); if (i == 0) { font_bbox.p1.x = bbox.p1.x; font_bbox.p1.y = bbox.p1.y; font_bbox.p2.x = bbox.p2.x; font_bbox.p2.y = bbox.p2.y; } else { if (bbox.p1.x < font_bbox.p1.x) font_bbox.p1.x = bbox.p1.x; if (bbox.p1.y < font_bbox.p1.y) font_bbox.p1.y = bbox.p1.y; if (bbox.p2.x > font_bbox.p2.x) font_bbox.p2.x = bbox.p2.x; if (bbox.p2.y > font_bbox.p2.y) font_bbox.p2.y = bbox.p2.y; } } cairo_surface_destroy (type3_surface); if (status) return status; _cairo_output_stream_printf (surface->final_stream, "] def\n" "/FontBBox [%f %f %f %f] def\n" "/BuildChar {\n" " exch /Glyphs get\n" " exch get\n" " 10 dict begin exec end\n" "} bind def\n" "currentdict\n" "end\n" "/f-%d-%d exch definefont pop\n", _cairo_fixed_to_double (font_bbox.p1.x), - _cairo_fixed_to_double (font_bbox.p2.y), _cairo_fixed_to_double (font_bbox.p2.x), - _cairo_fixed_to_double (font_bbox.p1.y), font_subset->font_id, font_subset->subset_id); return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_unscaled_font_subset (cairo_scaled_font_subset_t *font_subset, void *closure) { cairo_ps_surface_t *surface = closure; cairo_status_t status; status = _cairo_scaled_font_subset_create_glyph_names (font_subset); if (status && status != CAIRO_INT_STATUS_UNSUPPORTED) return status; #if CAIRO_HAS_FT_FONT status = _cairo_ps_surface_emit_type1_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; #endif status = _cairo_ps_surface_emit_truetype_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; status = _cairo_ps_surface_emit_type1_font_fallback (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; ASSERT_NOT_REACHED; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_scaled_font_subset (cairo_scaled_font_subset_t *font_subset, void *closure) { cairo_ps_surface_t *surface = closure; cairo_status_t status; status = _cairo_scaled_font_subset_create_glyph_names (font_subset); if (status && status != CAIRO_INT_STATUS_UNSUPPORTED) return status; status = _cairo_ps_surface_emit_type3_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; ASSERT_NOT_REACHED; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_font_subsets (cairo_ps_surface_t *surface) { cairo_status_t status; #if DEBUG_PS _cairo_output_stream_printf (surface->final_stream, "%% _cairo_ps_surface_emit_font_subsets\n"); #endif status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets, _cairo_ps_surface_analyze_user_font_subset, surface); if (status) goto BAIL; status = _cairo_scaled_font_subsets_foreach_unscaled (surface->font_subsets, _cairo_ps_surface_emit_unscaled_font_subset, surface); if (status) goto BAIL; status = _cairo_scaled_font_subsets_foreach_scaled (surface->font_subsets, _cairo_ps_surface_emit_scaled_font_subset, surface); if (status) goto BAIL; status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets, _cairo_ps_surface_emit_scaled_font_subset, surface); BAIL: _cairo_scaled_font_subsets_destroy (surface->font_subsets); surface->font_subsets = NULL; return status; } static cairo_status_t _cairo_ps_surface_emit_body (cairo_ps_surface_t *surface) { char buf[4096]; int n; if (ferror (surface->tmpfile) != 0) return _cairo_error (CAIRO_STATUS_TEMP_FILE_ERROR); rewind (surface->tmpfile); while ((n = fread (buf, 1, sizeof (buf), surface->tmpfile)) > 0) _cairo_output_stream_write (surface->final_stream, buf, n); if (ferror (surface->tmpfile) != 0) return _cairo_error (CAIRO_STATUS_TEMP_FILE_ERROR); return CAIRO_STATUS_SUCCESS; } static void _cairo_ps_surface_emit_footer (cairo_ps_surface_t *surface) { _cairo_output_stream_printf (surface->final_stream, "%%%%Trailer\n"); if (surface->eps) { _cairo_output_stream_printf (surface->final_stream, "count op_count sub {pop} repeat\n" "countdictstack dict_count sub {end} repeat\n" "cairo_eps_state restore\n"); } _cairo_output_stream_printf (surface->final_stream, "%%%%EOF\n"); } static cairo_surface_t * _cairo_ps_surface_create_for_stream_internal (cairo_output_stream_t *stream, double width, double height) { cairo_status_t status, status_ignored; cairo_ps_surface_t *surface; surface = malloc (sizeof (cairo_ps_surface_t)); if (surface == NULL) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto CLEANUP; } _cairo_surface_init (&surface->base, &cairo_ps_surface_backend, CAIRO_CONTENT_COLOR_ALPHA); surface->final_stream = stream; surface->tmpfile = tmpfile (); if (surface->tmpfile == NULL) { switch (errno) { case ENOMEM: status = _cairo_error (CAIRO_STATUS_NO_MEMORY); break; default: status = _cairo_error (CAIRO_STATUS_TEMP_FILE_ERROR); break; } goto CLEANUP_SURFACE; } surface->stream = _cairo_output_stream_create_for_file (surface->tmpfile); status = _cairo_output_stream_get_status (surface->stream); if (status) goto CLEANUP_OUTPUT_STREAM; surface->font_subsets = _cairo_scaled_font_subsets_create_simple (); if (surface->font_subsets == NULL) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto CLEANUP_OUTPUT_STREAM; } surface->has_creation_date = FALSE; surface->eps = FALSE; surface->ps_level = CAIRO_PS_LEVEL_3; surface->ps_level_used = CAIRO_PS_LEVEL_2; surface->width = width; surface->height = height; cairo_matrix_init (&surface->cairo_to_ps, 1, 0, 0, -1, 0, height); surface->paginated_mode = CAIRO_PAGINATED_MODE_ANALYZE; surface->force_fallbacks = FALSE; surface->content = CAIRO_CONTENT_COLOR_ALPHA; surface->use_string_datasource = FALSE; surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_init (&surface->pdf_operators, surface->stream, &surface->cairo_to_ps, surface->font_subsets); surface->num_pages = 0; _cairo_array_init (&surface->dsc_header_comments, sizeof (char *)); _cairo_array_init (&surface->dsc_setup_comments, sizeof (char *)); _cairo_array_init (&surface->dsc_page_setup_comments, sizeof (char *)); surface->dsc_comment_target = &surface->dsc_header_comments; surface->paginated_surface = _cairo_paginated_surface_create ( &surface->base, CAIRO_CONTENT_COLOR_ALPHA, width, height, &cairo_ps_surface_paginated_backend); status = surface->paginated_surface->status; if (status == CAIRO_STATUS_SUCCESS) { /* paginated keeps the only reference to surface now, drop ours */ cairo_surface_destroy (&surface->base); return surface->paginated_surface; } _cairo_scaled_font_subsets_destroy (surface->font_subsets); CLEANUP_OUTPUT_STREAM: status_ignored = _cairo_output_stream_destroy (surface->stream); fclose (surface->tmpfile); CLEANUP_SURFACE: free (surface); CLEANUP: /* destroy stream on behalf of caller */ status_ignored = _cairo_output_stream_destroy (stream); return _cairo_surface_create_in_error (status); } /** * cairo_ps_surface_create: * @filename: a filename for the PS output (must be writable), %NULL may be * used to specify no output. This will generate a PS surface that * may be queried and used as a source, without generating a * temporary file. * @width_in_points: width of the surface, in points (1 point == 1/72.0 inch) * @height_in_points: height of the surface, in points (1 point == 1/72.0 inch) * * Creates a PostScript surface of the specified size in points to be * written to @filename. See cairo_ps_surface_create_for_stream() for * a more flexible mechanism for handling the PostScript output than * simply writing it to a named file. * * Note that the size of individual pages of the PostScript output can * vary. See cairo_ps_surface_set_size(). * * Return value: a pointer to the newly created surface. The caller * owns the surface and should call cairo_surface_destroy() when done * with it. * * This function always returns a valid pointer, but it will return a * pointer to a "nil" surface if an error such as out of memory * occurs. You can use cairo_surface_status() to check for this. * * Since: 1.2 **/ cairo_surface_t * cairo_ps_surface_create (const char *filename, double width_in_points, double height_in_points) { cairo_output_stream_t *stream; stream = _cairo_output_stream_create_for_filename (filename); if (_cairo_output_stream_get_status (stream)) return _cairo_surface_create_in_error (_cairo_output_stream_destroy (stream)); return _cairo_ps_surface_create_for_stream_internal (stream, width_in_points, height_in_points); } /** * cairo_ps_surface_create_for_stream: * @write_func: a #cairo_write_func_t to accept the output data, may be %NULL * to indicate a no-op @write_func. With a no-op @write_func, * the surface may be queried or used as a source without * generating any temporary files. * @closure: the closure argument for @write_func * @width_in_points: width of the surface, in points (1 point == 1/72.0 inch) * @height_in_points: height of the surface, in points (1 point == 1/72.0 inch) * * Creates a PostScript surface of the specified size in points to be * written incrementally to the stream represented by @write_func and * @closure. See cairo_ps_surface_create() for a more convenient way * to simply direct the PostScript output to a named file. * * Note that the size of individual pages of the PostScript * output can vary. See cairo_ps_surface_set_size(). * * Return value: a pointer to the newly created surface. The caller * owns the surface and should call cairo_surface_destroy() when done * with it. * * This function always returns a valid pointer, but it will return a * pointer to a "nil" surface if an error such as out of memory * occurs. You can use cairo_surface_status() to check for this. * * Since: 1.2 */ cairo_surface_t * cairo_ps_surface_create_for_stream (cairo_write_func_t write_func, void *closure, double width_in_points, double height_in_points) { cairo_output_stream_t *stream; stream = _cairo_output_stream_create (write_func, NULL, closure); if (_cairo_output_stream_get_status (stream)) return _cairo_surface_create_in_error (_cairo_output_stream_destroy (stream)); return _cairo_ps_surface_create_for_stream_internal (stream, width_in_points, height_in_points); } static cairo_bool_t _cairo_surface_is_ps (cairo_surface_t *surface) { return surface->backend == &cairo_ps_surface_backend; } /* If the abstract_surface is a paginated surface, and that paginated * surface's target is a ps_surface, then set ps_surface to that * target. Otherwise return %CAIRO_STATUS_SURFACE_TYPE_MISMATCH. */ static cairo_status_t _extract_ps_surface (cairo_surface_t *surface, cairo_ps_surface_t **ps_surface) { cairo_surface_t *target; if (surface->status) return surface->status; if (! _cairo_surface_is_paginated (surface)) return _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); target = _cairo_paginated_surface_get_target (surface); if (target->status) return target->status; if (! _cairo_surface_is_ps (target)) return _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); *ps_surface = (cairo_ps_surface_t *) target; return CAIRO_STATUS_SUCCESS; } /** * cairo_ps_surface_restrict_to_level: * @surface: a PostScript #cairo_surface_t * @level: PostScript level * * Restricts the generated PostSript file to @level. See * cairo_ps_get_levels() for a list of available level values that * can be used here. * * This function should only be called before any drawing operations * have been performed on the given surface. The simplest way to do * this is to call this function immediately after creating the * surface. * * Since: 1.6 **/ void cairo_ps_surface_restrict_to_level (cairo_surface_t *surface, cairo_ps_level_t level) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } if (level < CAIRO_PS_LEVEL_LAST) ps_surface->ps_level = level; } /** * cairo_ps_get_levels: * @levels: supported level list * @num_levels: list length * * Used to retrieve the list of supported levels. See * cairo_ps_surface_restrict_to_level(). * * Since: 1.6 **/ void cairo_ps_get_levels (cairo_ps_level_t const **levels, int *num_levels) { if (levels != NULL) *levels = _cairo_ps_levels; if (num_levels != NULL) *num_levels = CAIRO_PS_LEVEL_LAST; } /** * cairo_ps_level_to_string: * @level: a level id * * Get the string representation of the given @level id. This function * will return %NULL if @level id isn't valid. See cairo_ps_get_levels() * for a way to get the list of valid level ids. * * Return value: the string associated to given level. * * Since: 1.6 **/ const char * cairo_ps_level_to_string (cairo_ps_level_t level) { if (level >= CAIRO_PS_LEVEL_LAST) return NULL; return _cairo_ps_level_strings[level]; } /** * cairo_ps_surface_set_eps: * @surface: a PostScript #cairo_surface_t * @eps: %TRUE to output EPS format PostScript * * If @eps is %TRUE, the PostScript surface will output Encapsulated * PostScript. * * This function should only be called before any drawing operations * have been performed on the current page. The simplest way to do * this is to call this function immediately after creating the * surface. An Encapsulated PostScript file should never contain more * than one page. * * Since: 1.6 **/ void cairo_ps_surface_set_eps (cairo_surface_t *surface, cairo_bool_t eps) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } ps_surface->eps = eps; } /** * cairo_ps_surface_get_eps: * @surface: a PostScript #cairo_surface_t * * Check whether the PostScript surface will output Encapsulated PostScript. * * Return value: %TRUE if the surface will output Encapsulated PostScript. * * Since: 1.6 **/ cairo_public cairo_bool_t cairo_ps_surface_get_eps (cairo_surface_t *surface) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return FALSE; } return ps_surface->eps; } /** * cairo_ps_surface_set_size: * @surface: a PostScript #cairo_surface_t * @width_in_points: new surface width, in points (1 point == 1/72.0 inch) * @height_in_points: new surface height, in points (1 point == 1/72.0 inch) * * Changes the size of a PostScript surface for the current (and * subsequent) pages. * * This function should only be called before any drawing operations * have been performed on the current page. The simplest way to do * this is to call this function immediately after creating the * surface or immediately after completing a page with either * cairo_show_page() or cairo_copy_page(). * * Since: 1.2 **/ void cairo_ps_surface_set_size (cairo_surface_t *surface, double width_in_points, double height_in_points) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } ps_surface->width = width_in_points; ps_surface->height = height_in_points; cairo_matrix_init (&ps_surface->cairo_to_ps, 1, 0, 0, -1, 0, height_in_points); _cairo_pdf_operators_set_cairo_to_pdf_matrix (&ps_surface->pdf_operators, &ps_surface->cairo_to_ps); status = _cairo_paginated_surface_set_size (ps_surface->paginated_surface, width_in_points, height_in_points); if (status) status = _cairo_surface_set_error (surface, status); } /** * cairo_ps_surface_dsc_comment: * @surface: a PostScript #cairo_surface_t * @comment: a comment string to be emitted into the PostScript output * * Emit a comment into the PostScript output for the given surface. * * The comment is expected to conform to the PostScript Language * Document Structuring Conventions (DSC). Please see that manual for * details on the available comments and their meanings. In * particular, the %%IncludeFeature comment allows a * device-independent means of controlling printer device features. So * the PostScript Printer Description Files Specification will also be * a useful reference. * * The comment string must begin with a percent character (%) and the * total length of the string (including any initial percent * characters) must not exceed 255 characters. Violating either of * these conditions will place @surface into an error state. But * beyond these two conditions, this function will not enforce * conformance of the comment with any particular specification. * * The comment string should not have a trailing newline. * * The DSC specifies different sections in which particular comments * can appear. This function provides for comments to be emitted * within three sections: the header, the Setup section, and the * PageSetup section. Comments appearing in the first two sections * apply to the entire document while comments in the BeginPageSetup * section apply only to a single page. * * For comments to appear in the header section, this function should * be called after the surface is created, but before a call to * cairo_ps_surface_begin_setup(). * * For comments to appear in the Setup section, this function should * be called after a call to cairo_ps_surface_begin_setup() but before * a call to cairo_ps_surface_begin_page_setup(). * * For comments to appear in the PageSetup section, this function * should be called after a call to cairo_ps_surface_begin_page_setup(). * * Note that it is only necessary to call cairo_ps_surface_begin_page_setup() * for the first page of any surface. After a call to * cairo_show_page() or cairo_copy_page() comments are unambiguously * directed to the PageSetup section of the current page. But it * doesn't hurt to call this function at the beginning of every page * as that consistency may make the calling code simpler. * * As a final note, cairo automatically generates several comments on * its own. As such, applications must not manually generate any of * the following comments: * * Header section: %!PS-Adobe-3.0, %%Creator, %%CreationDate, %%Pages, * %%BoundingBox, %%DocumentData, %%LanguageLevel, %%EndComments. * * Setup section: %%BeginSetup, %%EndSetup * * PageSetup section: %%BeginPageSetup, %%PageBoundingBox, * %%EndPageSetup. * * Other sections: %%BeginProlog, %%EndProlog, %%Page, %%Trailer, %%EOF * * Here is an example sequence showing how this function might be used: * * * #cairo_surface_t *surface = cairo_ps_surface_create (filename, width, height); * ... * cairo_ps_surface_dsc_comment (surface, "%%Title: My excellent document"); * cairo_ps_surface_dsc_comment (surface, "%%Copyright: Copyright (C) 2006 Cairo Lover") * ... * cairo_ps_surface_dsc_begin_setup (surface); * cairo_ps_surface_dsc_comment (surface, "%%IncludeFeature: *MediaColor White"); * ... * cairo_ps_surface_dsc_begin_page_setup (surface); * cairo_ps_surface_dsc_comment (surface, "%%IncludeFeature: *PageSize A3"); * cairo_ps_surface_dsc_comment (surface, "%%IncludeFeature: *InputSlot LargeCapacity"); * cairo_ps_surface_dsc_comment (surface, "%%IncludeFeature: *MediaType Glossy"); * cairo_ps_surface_dsc_comment (surface, "%%IncludeFeature: *MediaColor Blue"); * ... draw to first page here .. * cairo_show_page (cr); * ... * cairo_ps_surface_dsc_comment (surface, "%%IncludeFeature: *PageSize A5"); * ... * * * Since: 1.2 **/ void cairo_ps_surface_dsc_comment (cairo_surface_t *surface, const char *comment) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; char *comment_copy; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } /* A couple of sanity checks on the comment value. */ if (comment == NULL) { status = _cairo_surface_set_error (surface, CAIRO_STATUS_NULL_POINTER); return; } if (comment[0] != '%' || strlen (comment) > 255) { status = _cairo_surface_set_error (surface, CAIRO_STATUS_INVALID_DSC_COMMENT); return; } /* Then, copy the comment and store it in the appropriate array. */ comment_copy = strdup (comment); if (comment_copy == NULL) { status = _cairo_surface_set_error (surface, CAIRO_STATUS_NO_MEMORY); return; } status = _cairo_array_append (ps_surface->dsc_comment_target, &comment_copy); if (status) { free (comment_copy); status = _cairo_surface_set_error (surface, status); return; } } /** * cairo_ps_surface_dsc_begin_setup: * @surface: a PostScript #cairo_surface_t * * This function indicates that subsequent calls to * cairo_ps_surface_dsc_comment() should direct comments to the Setup * section of the PostScript output. * * This function should be called at most once per surface, and must * be called before any call to cairo_ps_surface_dsc_begin_page_setup() * and before any drawing is performed to the surface. * * See cairo_ps_surface_dsc_comment() for more details. * * Since: 1.2 **/ void cairo_ps_surface_dsc_begin_setup (cairo_surface_t *surface) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } if (ps_surface->dsc_comment_target == &ps_surface->dsc_header_comments) { ps_surface->dsc_comment_target = &ps_surface->dsc_setup_comments; } } /** * cairo_ps_surface_dsc_begin_page_setup: * @surface: a PostScript #cairo_surface_t * * This function indicates that subsequent calls to * cairo_ps_surface_dsc_comment() should direct comments to the * PageSetup section of the PostScript output. * * This function call is only needed for the first page of a * surface. It should be called after any call to * cairo_ps_surface_dsc_begin_setup() and before any drawing is * performed to the surface. * * See cairo_ps_surface_dsc_comment() for more details. * * Since: 1.2 **/ void cairo_ps_surface_dsc_begin_page_setup (cairo_surface_t *surface) { cairo_ps_surface_t *ps_surface = NULL; cairo_status_t status; status = _extract_ps_surface (surface, &ps_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } if (ps_surface->dsc_comment_target == &ps_surface->dsc_header_comments || ps_surface->dsc_comment_target == &ps_surface->dsc_setup_comments) { ps_surface->dsc_comment_target = &ps_surface->dsc_page_setup_comments; } } static cairo_surface_t * _cairo_ps_surface_create_similar (void *abstract_surface, cairo_content_t content, int width, int height) { return _cairo_meta_surface_create (content, width, height); } static cairo_status_t _cairo_ps_surface_finish (void *abstract_surface) { cairo_status_t status, status2; cairo_ps_surface_t *surface = abstract_surface; int i, num_comments; char **comments; _cairo_ps_surface_emit_header (surface); status = _cairo_ps_surface_emit_font_subsets (surface); if (status) goto CLEANUP; status = _cairo_ps_surface_emit_body (surface); if (status) goto CLEANUP; _cairo_ps_surface_emit_footer (surface); CLEANUP: status2 = _cairo_output_stream_destroy (surface->stream); if (status == CAIRO_STATUS_SUCCESS) status = status2; fclose (surface->tmpfile); status2 = _cairo_output_stream_destroy (surface->final_stream); if (status == CAIRO_STATUS_SUCCESS) status = status2; num_comments = _cairo_array_num_elements (&surface->dsc_header_comments); comments = _cairo_array_index (&surface->dsc_header_comments, 0); for (i = 0; i < num_comments; i++) free (comments[i]); _cairo_array_fini (&surface->dsc_header_comments); num_comments = _cairo_array_num_elements (&surface->dsc_setup_comments); comments = _cairo_array_index (&surface->dsc_setup_comments, 0); for (i = 0; i < num_comments; i++) free (comments[i]); _cairo_array_fini (&surface->dsc_setup_comments); num_comments = _cairo_array_num_elements (&surface->dsc_page_setup_comments); comments = _cairo_array_index (&surface->dsc_page_setup_comments, 0); for (i = 0; i < num_comments; i++) free (comments[i]); _cairo_array_fini (&surface->dsc_page_setup_comments); return status; } static cairo_int_status_t _cairo_ps_surface_start_page (void *abstract_surface) { cairo_ps_surface_t *surface = abstract_surface; /* Increment before print so page numbers start at 1. */ surface->num_pages++; return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_ps_surface_end_page (cairo_ps_surface_t *surface) { cairo_int_status_t status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->stream, "Q\n"); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_ps_surface_show_page (void *abstract_surface) { cairo_ps_surface_t *surface = abstract_surface; cairo_int_status_t status; status = _cairo_ps_surface_end_page (surface); if (status) return status; _cairo_output_stream_printf (surface->stream, "showpage\n"); return CAIRO_STATUS_SUCCESS; } static cairo_bool_t color_is_gray (double red, double green, double blue) { const double epsilon = 0.00001; return (fabs (red - green) < epsilon && fabs (red - blue) < epsilon); } static cairo_int_status_t _cairo_ps_surface_analyze_surface_pattern_transparency (cairo_ps_surface_t *surface, cairo_surface_pattern_t *pattern) { cairo_image_surface_t *image; void *image_extra; cairo_int_status_t status; cairo_image_transparency_t transparency; status = _cairo_surface_acquire_source_image (pattern->surface, &image, &image_extra); if (status) return status; if (image->base.status) return image->base.status; transparency = _cairo_image_analyze_transparency (image); switch (transparency) { case CAIRO_IMAGE_IS_OPAQUE: status = CAIRO_STATUS_SUCCESS; break; case CAIRO_IMAGE_HAS_BILEVEL_ALPHA: if (surface->ps_level == CAIRO_PS_LEVEL_2) { status = CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY; } else { surface->ps_level_used = CAIRO_PS_LEVEL_3; status = CAIRO_STATUS_SUCCESS; } break; case CAIRO_IMAGE_HAS_ALPHA: status = CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY; break; case CAIRO_IMAGE_UNKNOWN: ASSERT_NOT_REACHED; } _cairo_surface_release_source_image (pattern->surface, image, image_extra); return status; } static cairo_bool_t surface_pattern_supported (cairo_surface_pattern_t *pattern) { cairo_extend_t extend; if (_cairo_surface_is_meta (pattern->surface)) return TRUE; if (pattern->surface->backend->acquire_source_image == NULL) return FALSE; /* Does an ALPHA-only source surface even make sense? Maybe, but I * don't think it's worth the extra code to support it. */ /* XXX: Need to write this function here... content = cairo_surface_get_content (pattern->surface); if (content == CAIRO_CONTENT_ALPHA) return FALSE; */ /* Cast away the const, trusting get_extend not to muck with it. * And I really wish I had a way to cast away just the const, and * not potentially coerce this pointer to an incorrect type at the * same time. :-( */ extend = cairo_pattern_get_extend ((cairo_pattern_t*)&pattern->base); switch (extend) { case CAIRO_EXTEND_NONE: case CAIRO_EXTEND_REPEAT: case CAIRO_EXTEND_REFLECT: /* There's no point returning FALSE for EXTEND_PAD, as the image * surface does not currently implement it either */ case CAIRO_EXTEND_PAD: return TRUE; } ASSERT_NOT_REACHED; return FALSE; } static cairo_bool_t _gradient_pattern_supported (cairo_ps_surface_t *surface, cairo_pattern_t *pattern) { cairo_gradient_pattern_t *gradient = (cairo_gradient_pattern_t *) pattern; uint16_t alpha; cairo_extend_t extend; unsigned int i; if (surface->ps_level == CAIRO_PS_LEVEL_2) return FALSE; if (gradient->n_stops == 0) return TRUE; /* Alpha gradients are only supported (by flattening the alpha) * if there is no variation in the alpha across the gradient. */ alpha = gradient->stops[0].color.alpha_short; for (i = 0; i < gradient->n_stops; i++) { if (gradient->stops[i].color.alpha_short != alpha) return FALSE; } extend = cairo_pattern_get_extend (pattern); /* Radial gradients are currently only supported when one circle * is inside the other. */ if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL) { double x1, y1, x2, y2, r1, r2, d; cairo_radial_pattern_t *radial = (cairo_radial_pattern_t *) pattern; if (extend == CAIRO_EXTEND_REPEAT || extend == CAIRO_EXTEND_REFLECT) { return FALSE; } x1 = _cairo_fixed_to_double (radial->c1.x); y1 = _cairo_fixed_to_double (radial->c1.y); r1 = _cairo_fixed_to_double (radial->r1); x2 = _cairo_fixed_to_double (radial->c2.x); y2 = _cairo_fixed_to_double (radial->c2.y); r2 = _cairo_fixed_to_double (radial->r2); d = sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1)); if (d > fabs(r2 - r1)) { return FALSE; } } surface->ps_level_used = CAIRO_PS_LEVEL_3; return TRUE; } static cairo_bool_t pattern_supported (cairo_ps_surface_t *surface, cairo_pattern_t *pattern) { if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) return TRUE; if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR || pattern->type == CAIRO_PATTERN_TYPE_RADIAL) return _gradient_pattern_supported (surface, pattern); if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) return surface_pattern_supported ((cairo_surface_pattern_t *) pattern); return FALSE; } static cairo_int_status_t _cairo_ps_surface_analyze_operation (cairo_ps_surface_t *surface, cairo_operator_t op, cairo_pattern_t *pattern) { if (surface->force_fallbacks && surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return CAIRO_INT_STATUS_UNSUPPORTED; if (! pattern_supported (surface, pattern)) return CAIRO_INT_STATUS_UNSUPPORTED; if (!(op == CAIRO_OPERATOR_SOURCE || op == CAIRO_OPERATOR_OVER)) return CAIRO_INT_STATUS_UNSUPPORTED; if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) { cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern; if ( _cairo_surface_is_meta (surface_pattern->surface)) return CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN; } if (op == CAIRO_OPERATOR_SOURCE) return CAIRO_STATUS_SUCCESS; /* CAIRO_OPERATOR_OVER is only supported for opaque patterns. If * the pattern contains transparency, we return * CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY to the analysis * surface. If the analysis surface determines that there is * anything drawn under this operation, a fallback image will be * used. Otherwise the operation will be replayed during the * render stage and we blend the transparency into the white * background to convert the pattern to opaque. */ if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) { cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern; return _cairo_ps_surface_analyze_surface_pattern_transparency (surface, surface_pattern); } if (_cairo_pattern_is_opaque (pattern)) return CAIRO_STATUS_SUCCESS; else return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY; } static cairo_bool_t _cairo_ps_surface_operation_supported (cairo_ps_surface_t *surface, cairo_operator_t op, cairo_pattern_t *pattern) { if (_cairo_ps_surface_analyze_operation (surface, op, pattern) != CAIRO_INT_STATUS_UNSUPPORTED) return TRUE; else return FALSE; } /* The "standard" implementation limit for PostScript string sizes is * 65535 characters (see PostScript Language Reference, Appendix * B). We go one short of that because we sometimes need two * characters in a string to represent a single ASCII85 byte, (for the * escape sequences "\\", "\(", and "\)") and we must not split these * across two strings. So we'd be in trouble if we went right to the * limit and one of these escape sequences just happened to land at * the end. */ #define STRING_ARRAY_MAX_STRING_SIZE (65535-1) #define STRING_ARRAY_MAX_COLUMN 72 typedef struct _string_array_stream { cairo_output_stream_t base; cairo_output_stream_t *output; int column; int string_size; cairo_bool_t use_strings; } string_array_stream_t; static cairo_status_t _string_array_stream_write (cairo_output_stream_t *base, const unsigned char *data, unsigned int length) { string_array_stream_t *stream = (string_array_stream_t *) base; unsigned char c; const unsigned char backslash = '\\'; if (length == 0) return CAIRO_STATUS_SUCCESS; while (length--) { if (stream->string_size == 0 && stream->use_strings) { _cairo_output_stream_printf (stream->output, "("); stream->column++; } c = *data++; if (stream->use_strings) { switch (c) { case '\\': case '(': case ')': _cairo_output_stream_write (stream->output, &backslash, 1); stream->column++; stream->string_size++; break; } } /* Have to be careful to never split the final ~> sequence. */ if (c == '~') { _cairo_output_stream_write (stream->output, &c, 1); stream->column++; stream->string_size++; if (length-- == 0) break; c = *data++; } _cairo_output_stream_write (stream->output, &c, 1); stream->column++; stream->string_size++; if (stream->use_strings && stream->string_size >= STRING_ARRAY_MAX_STRING_SIZE) { _cairo_output_stream_printf (stream->output, ")\n"); stream->string_size = 0; stream->column = 0; } if (stream->column >= STRING_ARRAY_MAX_COLUMN) { _cairo_output_stream_printf (stream->output, "\n "); stream->string_size += 2; stream->column = 1; } } return _cairo_output_stream_get_status (stream->output); } static cairo_status_t _string_array_stream_close (cairo_output_stream_t *base) { cairo_status_t status; string_array_stream_t *stream = (string_array_stream_t *) base; if (stream->use_strings) _cairo_output_stream_printf (stream->output, ")\n"); status = _cairo_output_stream_get_status (stream->output); return status; } /* A string_array_stream wraps an existing output stream. It takes the * data provided to it and output one or more consecutive string * objects, each within the standard PostScript implementation limit * of 65k characters. * * The strings are each separated by a space character for easy * inclusion within an array object, (but the array delimiters are not * added by the string_array_stream). * * The string array stream is also careful to wrap the output within * STRING_ARRAY_MAX_COLUMN columns (+/- 1). The stream also adds * necessary escaping for special characters within a string, * (specifically '\', '(', and ')'). */ static cairo_output_stream_t * _string_array_stream_create (cairo_output_stream_t *output) { string_array_stream_t *stream; stream = malloc (sizeof (string_array_stream_t)); if (stream == NULL) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return (cairo_output_stream_t *) &_cairo_output_stream_nil; } _cairo_output_stream_init (&stream->base, _string_array_stream_write, _string_array_stream_close); stream->output = output; stream->column = 0; stream->string_size = 0; stream->use_strings = TRUE; return &stream->base; } /* A base85_array_stream wraps an existing output stream. It wraps the * output within STRING_ARRAY_MAX_COLUMN columns (+/- 1). The output * is not enclosed in strings like string_array_stream. */ static cairo_output_stream_t * _base85_array_stream_create (cairo_output_stream_t *output) { string_array_stream_t *stream; stream = malloc (sizeof (string_array_stream_t)); if (stream == NULL) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return (cairo_output_stream_t *) &_cairo_output_stream_nil; } _cairo_output_stream_init (&stream->base, _string_array_stream_write, _string_array_stream_close); stream->output = output; stream->column = 0; stream->string_size = 0; stream->use_strings = FALSE; return &stream->base; } /* PS Output - this section handles output of the parts of the meta * surface we can render natively in PS. */ static cairo_status_t _cairo_ps_surface_flatten_image_transparency (cairo_ps_surface_t *surface, cairo_image_surface_t *image, cairo_image_surface_t **opaque_image) { const cairo_color_t *background_color; cairo_surface_t *opaque; cairo_surface_pattern_t pattern; cairo_status_t status; if (surface->content == CAIRO_CONTENT_COLOR_ALPHA) background_color = CAIRO_COLOR_WHITE; else background_color = CAIRO_COLOR_BLACK; opaque = cairo_image_surface_create (CAIRO_FORMAT_RGB24, image->width, image->height); if (opaque->status) return opaque->status; _cairo_pattern_init_for_surface (&pattern, &image->base); status = _cairo_surface_fill_rectangle (opaque, CAIRO_OPERATOR_SOURCE, background_color, 0, 0, image->width, image->height); if (status) goto fail; status = _cairo_surface_composite (CAIRO_OPERATOR_OVER, &pattern.base, NULL, opaque, 0, 0, 0, 0, 0, 0, image->width, image->height); if (status) goto fail; _cairo_pattern_fini (&pattern.base); *opaque_image = (cairo_image_surface_t *) opaque; return CAIRO_STATUS_SUCCESS; fail: _cairo_pattern_fini (&pattern.base); cairo_surface_destroy (opaque); return status; } static cairo_status_t _cairo_ps_surface_emit_base85_string (cairo_ps_surface_t *surface, unsigned char *data, unsigned long length, cairo_bool_t use_strings) { cairo_output_stream_t *base85_stream, *string_array_stream; cairo_status_t status, status2; if (use_strings) string_array_stream = _string_array_stream_create (surface->stream); else string_array_stream = _base85_array_stream_create (surface->stream); status = _cairo_output_stream_get_status (string_array_stream); if (status) return _cairo_output_stream_destroy (string_array_stream); base85_stream = _cairo_base85_stream_create (string_array_stream); status = _cairo_output_stream_get_status (base85_stream); if (status) { status2 = _cairo_output_stream_destroy (string_array_stream); return _cairo_output_stream_destroy (base85_stream); } _cairo_output_stream_write (base85_stream, data, length); status = _cairo_output_stream_destroy (base85_stream); status2 = _cairo_output_stream_destroy (string_array_stream); if (status == CAIRO_STATUS_SUCCESS) status = status2; return status; } static cairo_status_t _cairo_ps_surface_emit_image (cairo_ps_surface_t *surface, cairo_image_surface_t *image, cairo_operator_t op) { cairo_status_t status; unsigned char *data, *data_compressed; unsigned long data_size, data_compressed_size; cairo_image_surface_t *opaque_image = NULL; int x, y, i; cairo_image_transparency_t transparency; cairo_bool_t use_mask; uint32_t *pixel; int bit; if (image->base.status) return image->base.status; transparency = _cairo_image_analyze_transparency (image); /* PostScript can not represent the alpha channel, so we blend the current image over a white (or black for CONTENT_COLOR surfaces) RGB surface to eliminate it. */ if (op == CAIRO_OPERATOR_SOURCE || transparency == CAIRO_IMAGE_HAS_ALPHA || (transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA && surface->ps_level == CAIRO_PS_LEVEL_2)) { status = _cairo_ps_surface_flatten_image_transparency (surface, image, &opaque_image); if (status) return status; use_mask = FALSE; } else if (transparency == CAIRO_IMAGE_IS_OPAQUE) { opaque_image = image; use_mask = FALSE; } else { use_mask = TRUE; } if (use_mask) { /* Type 2 (mask and image interleaved) has the mask and image * samples interleaved by row. The mask row is first, one bit * per pixel with (bit 7 first). The row is padded to byte * boundaries. The image data is 3 bytes per pixel RGB * format. */ data_size = image->height * ((image->width + 7)/8 + 3*image->width); } else { data_size = image->height * image->width * 3; } data = malloc (data_size); if (data == NULL) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto bail1; } if (use_mask) { i = 0; for (y = 0; y < image->height; y++) { /* mask row */ pixel = (uint32_t *) (image->data + y * image->stride); bit = 7; for (x = 0; x < image->width; x++, pixel++) { if (bit == 7) data[i] = 0; if (((*pixel & 0xff000000) >> 24) > 0x80) data[i] |= (1 << bit); bit--; if (bit < 0) { bit = 7; i++; } } if (bit != 7) i++; /* image row*/ pixel = (uint32_t *) (image->data + y * image->stride); for (x = 0; x < image->width; x++, pixel++) { data[i++] = (*pixel & 0x00ff0000) >> 16; data[i++] = (*pixel & 0x0000ff00) >> 8; data[i++] = (*pixel & 0x000000ff) >> 0; } } } else { i = 0; for (y = 0; y < opaque_image->height; y++) { pixel = (uint32_t *) (opaque_image->data + y * opaque_image->stride); for (x = 0; x < opaque_image->width; x++, pixel++) { data[i++] = (*pixel & 0x00ff0000) >> 16; data[i++] = (*pixel & 0x0000ff00) >> 8; data[i++] = (*pixel & 0x000000ff) >> 0; } } } /* XXX: Should fix cairo-lzw to provide a stream-based interface * instead. */ data_compressed_size = data_size; data_compressed = _cairo_lzw_compress (data, &data_compressed_size); if (data_compressed == NULL) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto bail2; } if (surface->use_string_datasource) { /* Emit the image data as a base85-encoded string which will * be used as the data source for the image operator later. */ _cairo_output_stream_printf (surface->stream, "/CairoImageData [\n"); status = _cairo_ps_surface_emit_base85_string (surface, data_compressed, data_compressed_size, TRUE); if (status) goto bail3; _cairo_output_stream_printf (surface->stream, "] def\n"); _cairo_output_stream_printf (surface->stream, "/CairoImageDataIndex 0 def\n"); } if (use_mask) { _cairo_output_stream_printf (surface->stream, "/DeviceRGB setcolorspace\n" "5 dict dup begin\n" " /ImageType 3 def\n" " /InterleaveType 2 def\n" " /DataDict 8 dict def\n" " DataDict begin\n" " /ImageType 1 def\n" " /Width %d def\n" " /Height %d def\n" " /BitsPerComponent 8 def\n" " /Decode [ 0 1 0 1 0 1 ] def\n", image->width, image->height); if (surface->use_string_datasource) { _cairo_output_stream_printf (surface->stream, " /DataSource {\n" " CairoImageData CairoImageDataIndex get\n" " /CairoImageDataIndex CairoImageDataIndex 1 add def\n" " CairoImageDataIndex CairoImageData length 1 sub gt\n" " { /CairoImageDataIndex 0 def } if\n" " } /ASCII85Decode filter /LZWDecode filter def\n"); } else { _cairo_output_stream_printf (surface->stream, " /DataSource currentfile /ASCII85Decode filter /LZWDecode filter def\n"); } _cairo_output_stream_printf (surface->stream, " /ImageMatrix [ 1 0 0 -1 0 %d ] def\n" " end\n" " /MaskDict 8 dict def\n" " MaskDict begin\n" " /ImageType 1 def\n" " /Width %d def\n" " /Height %d def\n" " /BitsPerComponent 1 def\n" " /Decode [ 1 0 ] def\n" " /ImageMatrix [ 1 0 0 -1 0 %d ] def\n" " end\n" "end\n" "image\n", image->height, image->width, image->height, image->height); } else { _cairo_output_stream_printf (surface->stream, "/DeviceRGB setcolorspace\n" "8 dict dup begin\n" " /ImageType 1 def\n" " /Width %d def\n" " /Height %d def\n" " /BitsPerComponent 8 def\n" " /Decode [ 0 1 0 1 0 1 ] def\n", opaque_image->width, opaque_image->height); if (surface->use_string_datasource) { _cairo_output_stream_printf (surface->stream, " /DataSource {\n" " CairoImageData CairoImageDataIndex get\n" " /CairoImageDataIndex CairoImageDataIndex 1 add def\n" " CairoImageDataIndex CairoImageData length 1 sub gt\n" " { /CairoImageDataIndex 0 def } if\n" " } /ASCII85Decode filter /LZWDecode filter def\n"); } else { _cairo_output_stream_printf (surface->stream, " /DataSource currentfile /ASCII85Decode filter /LZWDecode filter def\n"); } _cairo_output_stream_printf (surface->stream, " /ImageMatrix [ 1 0 0 -1 0 %d ] def\n" "end\n" "image\n", opaque_image->height); } if (!surface->use_string_datasource) { /* Emit the image data as a base85-encoded string which will * be used as the data source for the image operator. */ status = _cairo_ps_surface_emit_base85_string (surface, data_compressed, data_compressed_size, FALSE); } else { status = CAIRO_STATUS_SUCCESS; } bail3: free (data_compressed); bail2: free (data); bail1: if (!use_mask && opaque_image != image) cairo_surface_destroy (&opaque_image->base); return status; } static cairo_status_t _cairo_ps_surface_emit_meta_surface (cairo_ps_surface_t *surface, cairo_surface_t *meta_surface) { double old_width, old_height; cairo_matrix_t old_cairo_to_ps; cairo_content_t old_content; cairo_clip_t *old_clip; cairo_rectangle_int_t meta_extents; cairo_status_t status; status = _cairo_surface_get_extents (meta_surface, &meta_extents); if (status) return status; old_content = surface->content; old_width = surface->width; old_height = surface->height; old_cairo_to_ps = surface->cairo_to_ps; old_clip = _cairo_surface_get_clip (&surface->base); surface->width = meta_extents.width; surface->height = meta_extents.height; surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); cairo_matrix_init (&surface->cairo_to_ps, 1, 0, 0, -1, 0, surface->height); _cairo_pdf_operators_set_cairo_to_pdf_matrix (&surface->pdf_operators, &surface->cairo_to_ps); _cairo_output_stream_printf (surface->stream, " q\n" " 0 0 %f %f rectclip\n", surface->width, surface->height); if (cairo_surface_get_content (meta_surface) == CAIRO_CONTENT_COLOR) { surface->content = CAIRO_CONTENT_COLOR; _cairo_output_stream_printf (surface->stream, " 0 g 0 0 %f %f rectfill\n", surface->width, surface->height); } status = _cairo_meta_surface_replay_region (meta_surface, &surface->base, CAIRO_META_REGION_NATIVE); assert (status != CAIRO_INT_STATUS_UNSUPPORTED); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->stream, " Q\n"); surface->content = old_content; surface->width = old_width; surface->height = old_height; surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); surface->cairo_to_ps = old_cairo_to_ps; status = _cairo_surface_set_clip (&surface->base, old_clip); if (status) return status; _cairo_pdf_operators_set_cairo_to_pdf_matrix (&surface->pdf_operators, &surface->cairo_to_ps); return CAIRO_STATUS_SUCCESS; } static void _cairo_ps_surface_flatten_transparency (cairo_ps_surface_t *surface, const cairo_color_t *color, double *red, double *green, double *blue) { *red = color->red; *green = color->green; *blue = color->blue; if (! CAIRO_COLOR_IS_OPAQUE (color)) { *red *= color->alpha; *green *= color->alpha; *blue *= color->alpha; if (surface->content == CAIRO_CONTENT_COLOR_ALPHA) { double one_minus_alpha = 1. - color->alpha; *red += one_minus_alpha; *green += one_minus_alpha; *blue += one_minus_alpha; } } } static void _cairo_ps_surface_emit_solid_pattern (cairo_ps_surface_t *surface, cairo_solid_pattern_t *pattern) { double red, green, blue; _cairo_ps_surface_flatten_transparency (surface, &pattern->color, &red, &green, &blue); if (color_is_gray (red, green, blue)) _cairo_output_stream_printf (surface->stream, "%f g\n", red); else _cairo_output_stream_printf (surface->stream, "%f %f %f rg\n", red, green, blue); } static cairo_status_t _cairo_ps_surface_acquire_surface (cairo_ps_surface_t *surface, cairo_surface_pattern_t *pattern, int *width, int *height, cairo_operator_t op) { cairo_status_t status; if (_cairo_surface_is_meta (pattern->surface)) { cairo_surface_t *meta_surface = pattern->surface; cairo_rectangle_int_t pattern_extents; status = _cairo_surface_get_extents (meta_surface, &pattern_extents); if (status) return status; *width = pattern_extents.width; *height = pattern_extents.height; } else { status = _cairo_surface_acquire_source_image (pattern->surface, &surface->image, &surface->image_extra); if (status) return status; *width = surface->image->width; *height = surface->image->height; } return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_surface (cairo_ps_surface_t *surface, cairo_surface_pattern_t *pattern, cairo_operator_t op) { cairo_status_t status; if (_cairo_surface_is_meta (pattern->surface)) { cairo_surface_t *meta_surface = pattern->surface; status = _cairo_ps_surface_emit_meta_surface (surface, meta_surface); } else { status = _cairo_ps_surface_emit_image (surface, surface->image, op); } return status; } static void _cairo_ps_surface_release_surface (cairo_ps_surface_t *surface, cairo_surface_pattern_t *pattern) { if (!_cairo_surface_is_meta (pattern->surface)) _cairo_surface_release_source_image (pattern->surface, surface->image, surface->image_extra); } static cairo_status_t _cairo_ps_surface_paint_surface (cairo_ps_surface_t *surface, cairo_surface_pattern_t *pattern, cairo_operator_t op) { cairo_status_t status; int width, height; cairo_matrix_t cairo_p2d, ps_p2d; status = _cairo_ps_surface_acquire_surface (surface, pattern, &width, &height, op); if (status) return status; cairo_p2d = pattern->base.matrix; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) { double scale = cairo_p2d.xx; _cairo_output_stream_printf (surface->stream, "%% Fallback Image: x=%f, y=%f, w=%d, h=%d res=%fdpi size=%ld\n", -cairo_p2d.x0/scale, -cairo_p2d.y0/scale, (int)(width/scale), (int)(height/scale), scale*72, (long)width*height*3); } else { if (op == CAIRO_OPERATOR_SOURCE) { _cairo_output_stream_printf (surface->stream, "%d g 0 0 %f %f rectfill\n", surface->content == CAIRO_CONTENT_COLOR ? 0 : 1, surface->width, surface->height); } } status = cairo_matrix_invert (&cairo_p2d); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); ps_p2d = surface->cairo_to_ps; cairo_matrix_multiply (&ps_p2d, &cairo_p2d, &ps_p2d); cairo_matrix_translate (&ps_p2d, 0.0, height); cairo_matrix_scale (&ps_p2d, 1.0, -1.0); if (! _cairo_matrix_is_identity (&ps_p2d)) { _cairo_output_stream_printf (surface->stream, "[ %f %f %f %f %f %f ] concat\n", ps_p2d.xx, ps_p2d.yx, ps_p2d.xy, ps_p2d.yy, ps_p2d.x0, ps_p2d.y0); } status = _cairo_ps_surface_emit_surface (surface, pattern, op); _cairo_ps_surface_release_surface (surface, pattern); return status; } static cairo_status_t _cairo_ps_surface_emit_surface_pattern (cairo_ps_surface_t *surface, cairo_surface_pattern_t *pattern, cairo_operator_t op) { cairo_status_t status; int pattern_width = 0; /* squelch bogus compiler warning */ int pattern_height = 0; /* squelch bogus compiler warning */ double xstep, ystep; cairo_matrix_t cairo_p2d, ps_p2d; cairo_rectangle_int_t surface_extents; cairo_bool_t old_use_string_datasource; cairo_p2d = pattern->base.matrix; status = cairo_matrix_invert (&cairo_p2d); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); ps_p2d = surface->cairo_to_ps; cairo_matrix_multiply (&ps_p2d, &cairo_p2d, &ps_p2d); cairo_matrix_translate (&ps_p2d, 0.0, pattern_height); cairo_matrix_scale (&ps_p2d, 1.0, -1.0); status = _cairo_ps_surface_acquire_surface (surface, pattern, &pattern_width, &pattern_height, op); if (status) return status; switch (pattern->base.extend) { /* We implement EXTEND_PAD like EXTEND_NONE for now */ case CAIRO_EXTEND_PAD: case CAIRO_EXTEND_NONE: { /* In PS/PDF, (as far as I can tell), all patterns are * repeating. So we support cairo's EXTEND_NONE semantics * by setting the repeat step size to a size large enough * to guarantee that no more than a single occurrence will * be visible. * * First, map the surface extents into pattern space (since * xstep and ystep are in pattern space). Then use an upper * bound on the length of the diagonal of the pattern image * and the surface as repeat size. This guarantees to never * repeat visibly. */ double x1 = 0.0, y1 = 0.0; double x2 = surface->width, y2 = surface->height; _cairo_matrix_transform_bounding_box (&pattern->base.matrix, &x1, &y1, &x2, &y2, NULL); /* Rather than computing precise bounds of the union, just * add the surface extents unconditionally. We only * required an answer that's large enough, we don't really * care if it's not as tight as possible.*/ xstep = ystep = ceil ((x2 - x1) + (y2 - y1) + pattern_width + pattern_height); break; } case CAIRO_EXTEND_REPEAT: xstep = pattern_width; ystep = pattern_height; break; case CAIRO_EXTEND_REFLECT: xstep = pattern_width*2; ystep = pattern_height*2; break; /* All the rest (if any) should have been analyzed away, so these * cases should be unreachable. */ default: ASSERT_NOT_REACHED; xstep = 0; ystep = 0; } _cairo_output_stream_printf (surface->stream, "/CairoPattern {\n"); old_use_string_datasource = surface->use_string_datasource; surface->use_string_datasource = TRUE; if (op == CAIRO_OPERATOR_SOURCE) { _cairo_output_stream_printf (surface->stream, "%d g 0 0 %f %f rectfill\n", surface->content == CAIRO_CONTENT_COLOR ? 0 : 1, xstep, ystep); } status = _cairo_ps_surface_emit_surface (surface, pattern, op); if (status) return status; surface->use_string_datasource = old_use_string_datasource; _cairo_output_stream_printf (surface->stream, "} bind def\n"); _cairo_output_stream_printf (surface->stream, "<< /PatternType 1\n" " /PaintType 1\n" " /TilingType 1\n"); _cairo_output_stream_printf (surface->stream, " /XStep %f /YStep %f\n", xstep, ystep); if (pattern->base.extend == CAIRO_EXTEND_REFLECT) { _cairo_output_stream_printf (surface->stream, " /BBox [0 0 %d %d]\n" " /PaintProc {\n" " CairoPattern\n" " [-1 0 0 1 %d 0] concat CairoPattern\n" " [ 1 0 0 -1 0 %d] concat CairoPattern\n" " [-1 0 0 1 %d 0] concat CairoPattern\n" " CairoPattern\n" " } bind\n", pattern_width*2, pattern_height*2, pattern_width*2, pattern_height*2, pattern_width*2); } else { if (op == CAIRO_OPERATOR_SOURCE) { _cairo_output_stream_printf (surface->stream, " /BBox [0 0 %f %f]\n", xstep, ystep); } else { _cairo_output_stream_printf (surface->stream, " /BBox [0 0 %d %d]\n", pattern_width, pattern_height); } _cairo_output_stream_printf (surface->stream, " /PaintProc { CairoPattern }\n"); } _cairo_output_stream_printf (surface->stream, ">>\n"); status = _cairo_surface_get_extents (&surface->base, &surface_extents); if (status) return status; cairo_p2d = pattern->base.matrix; status = cairo_matrix_invert (&cairo_p2d); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); cairo_matrix_init_identity (&ps_p2d); cairo_matrix_translate (&ps_p2d, 0.0, surface_extents.height); cairo_matrix_scale (&ps_p2d, 1.0, -1.0); cairo_matrix_multiply (&ps_p2d, &cairo_p2d, &ps_p2d); cairo_matrix_translate (&ps_p2d, 0.0, pattern_height); cairo_matrix_scale (&ps_p2d, 1.0, -1.0); _cairo_output_stream_printf (surface->stream, "[ %f %f %f %f %f %f ]\n", ps_p2d.xx, ps_p2d.yx, ps_p2d.xy, ps_p2d.yy, ps_p2d.x0, ps_p2d.y0); _cairo_output_stream_printf (surface->stream, "makepattern setpattern\n"); return CAIRO_STATUS_SUCCESS; } typedef struct _cairo_ps_color_stop { double offset; double color[4]; } cairo_ps_color_stop_t; static void _cairo_ps_surface_emit_linear_colorgradient (cairo_ps_surface_t *surface, cairo_ps_color_stop_t *stop1, cairo_ps_color_stop_t *stop2) { _cairo_output_stream_printf (surface->stream, " << /FunctionType 2\n" " /Domain [ 0 1 ]\n" " /C0 [ %f %f %f ]\n" " /C1 [ %f %f %f ]\n" " /N 1\n" " >>\n", stop1->color[0], stop1->color[1], stop1->color[2], stop2->color[0], stop2->color[1], stop2->color[2]); } static void _cairo_ps_surface_emit_stitched_colorgradient (cairo_ps_surface_t *surface, unsigned int n_stops, cairo_ps_color_stop_t stops[]) { unsigned int i; _cairo_output_stream_printf (surface->stream, "<< /FunctionType 3\n" " /Domain [ 0 1 ]\n" " /Functions [\n"); for (i = 0; i < n_stops - 1; i++) _cairo_ps_surface_emit_linear_colorgradient (surface, &stops[i], &stops[i+1]); _cairo_output_stream_printf (surface->stream, " ]\n"); _cairo_output_stream_printf (surface->stream, " /Bounds [ "); for (i = 1; i < n_stops-1; i++) _cairo_output_stream_printf (surface->stream, "%f ", stops[i].offset); _cairo_output_stream_printf (surface->stream, "]\n"); _cairo_output_stream_printf (surface->stream, " /Encode [ 1 1 %d { pop 0 1 } for ]\n", n_stops - 1); _cairo_output_stream_printf (surface->stream, ">>\n"); } static void calc_gradient_color (cairo_ps_color_stop_t *new_stop, cairo_ps_color_stop_t *stop1, cairo_ps_color_stop_t *stop2) { int i; double offset = stop1->offset / (stop1->offset + 1.0 - stop2->offset); for (i = 0; i < 4; i++) new_stop->color[i] = stop1->color[i] + offset*(stop2->color[i] - stop1->color[i]); } #define COLOR_STOP_EPSILON 1e-6 static cairo_status_t _cairo_ps_surface_emit_pattern_stops (cairo_ps_surface_t *surface, cairo_gradient_pattern_t *pattern) { cairo_ps_color_stop_t *allstops, *stops; unsigned int i, n_stops; allstops = _cairo_malloc_ab ((pattern->n_stops + 2), sizeof (cairo_ps_color_stop_t)); if (allstops == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); stops = &allstops[1]; n_stops = pattern->n_stops; for (i = 0; i < n_stops; i++) { cairo_gradient_stop_t *stop = &pattern->stops[i]; stops[i].color[0] = stop->color.red; stops[i].color[1] = stop->color.green; stops[i].color[2] = stop->color.blue; stops[i].color[3] = stop->color.alpha; stops[i].offset = pattern->stops[i].offset; } if (pattern->base.extend == CAIRO_EXTEND_REPEAT || pattern->base.extend == CAIRO_EXTEND_REFLECT) { if (stops[0].offset > COLOR_STOP_EPSILON) { if (pattern->base.extend == CAIRO_EXTEND_REFLECT) memcpy (allstops, stops, sizeof (cairo_ps_color_stop_t)); else calc_gradient_color (&allstops[0], &stops[0], &stops[n_stops-1]); stops = allstops; n_stops++; } stops[0].offset = 0.0; if (stops[n_stops-1].offset < 1.0 - COLOR_STOP_EPSILON) { if (pattern->base.extend == CAIRO_EXTEND_REFLECT) { memcpy (&stops[n_stops], &stops[n_stops - 1], sizeof (cairo_ps_color_stop_t)); } else { calc_gradient_color (&stops[n_stops], &stops[0], &stops[n_stops-1]); } n_stops++; } stops[n_stops-1].offset = 1.0; } for (i = 0; i < n_stops; i++) { double red, green, blue; cairo_color_t color; _cairo_color_init_rgba (&color, stops[i].color[0], stops[i].color[1], stops[i].color[2], stops[i].color[3]); _cairo_ps_surface_flatten_transparency (surface, &color, &red, &green, &blue); stops[i].color[0] = red; stops[i].color[1] = green; stops[i].color[2] = blue; } _cairo_output_stream_printf (surface->stream, "/CairoFunction\n"); if (n_stops == 2) { /* no need for stitched function */ _cairo_ps_surface_emit_linear_colorgradient (surface, &stops[0], &stops[1]); } else { /* multiple stops: stitch. XXX possible optimization: regulary spaced * stops do not require stitching. XXX */ _cairo_ps_surface_emit_stitched_colorgradient (surface, n_stops,stops); } _cairo_output_stream_printf (surface->stream, "def\n"); free (allstops); return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_repeating_function (cairo_ps_surface_t *surface, cairo_gradient_pattern_t *pattern, int begin, int end) { _cairo_output_stream_printf (surface->stream, "/CairoFunction\n" "<< /FunctionType 3\n" " /Domain [ %d %d ]\n" " /Functions [ %d {CairoFunction} repeat ]\n" " /Bounds [ %d 1 %d {} for ]\n", begin, end, end - begin, begin + 1, end - 1); if (pattern->base.extend == CAIRO_EXTEND_REFLECT) { _cairo_output_stream_printf (surface->stream, " /Encode [ %d 1 %d { 2 mod 0 eq {0 1} {1 0} ifelse } for ]\n", begin, end - 1); } else { _cairo_output_stream_printf (surface->stream, " /Encode [ %d 1 %d { pop 0 1 } for ]\n", begin, end - 1); } _cairo_output_stream_printf (surface->stream, ">> def\n"); return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_ps_surface_emit_linear_pattern (cairo_ps_surface_t *surface, cairo_linear_pattern_t *pattern) { double x1, y1, x2, y2; double _x1, _y1, _x2, _y2; cairo_matrix_t pat_to_ps; cairo_extend_t extend; cairo_status_t status; cairo_gradient_pattern_t *gradient = &pattern->base; double first_stop, last_stop; int repeat_begin = 0, repeat_end = 1; if (pattern->base.n_stops == 0) return CAIRO_INT_STATUS_NOTHING_TO_DO; if (pattern->base.n_stops == 1) { cairo_solid_pattern_t solid; _cairo_pattern_init_solid (&solid, &pattern->base.stops[0].color, CAIRO_CONTENT_COLOR_ALPHA); _cairo_ps_surface_emit_solid_pattern (surface, &solid); _cairo_pattern_fini (&solid.base); return CAIRO_STATUS_SUCCESS; } extend = cairo_pattern_get_extend (&pattern->base.base); pat_to_ps = pattern->base.base.matrix; status = cairo_matrix_invert (&pat_to_ps); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); cairo_matrix_multiply (&pat_to_ps, &pat_to_ps, &surface->cairo_to_ps); first_stop = gradient->stops[0].offset; last_stop = gradient->stops[gradient->n_stops - 1].offset; if (pattern->base.base.extend == CAIRO_EXTEND_REPEAT || pattern->base.base.extend == CAIRO_EXTEND_REFLECT) { double dx, dy; int x_rep = 0, y_rep = 0; x1 = _cairo_fixed_to_double (pattern->p1.x); y1 = _cairo_fixed_to_double (pattern->p1.y); cairo_matrix_transform_point (&pat_to_ps, &x1, &y1); x2 = _cairo_fixed_to_double (pattern->p2.x); y2 = _cairo_fixed_to_double (pattern->p2.y); cairo_matrix_transform_point (&pat_to_ps, &x2, &y2); dx = fabs (x2 - x1); dy = fabs (y2 - y1); if (dx > 1e-6) x_rep = (int) ceil (surface->width/dx); if (dy > 1e-6) y_rep = (int) ceil (surface->height/dy); repeat_end = MAX (x_rep, y_rep); repeat_begin = -repeat_end; first_stop = repeat_begin; last_stop = repeat_end; } /* PS requires the first and last stop to be the same as the line * coordinates. For repeating patterns this moves the line * coordinates out to the begin/end of the repeating function. For * non repeating patterns this may move the line coordinates in if * there are not stops at offset 0 and 1. */ x1 = _cairo_fixed_to_double (pattern->p1.x); y1 = _cairo_fixed_to_double (pattern->p1.y); x2 = _cairo_fixed_to_double (pattern->p2.x); y2 = _cairo_fixed_to_double (pattern->p2.y); _x1 = x1 + (x2 - x1)*first_stop; _y1 = y1 + (y2 - y1)*first_stop; _x2 = x1 + (x2 - x1)*last_stop; _y2 = y1 + (y2 - y1)*last_stop; x1 = _x1; x2 = _x2; y1 = _y1; y2 = _y2; /* For EXTEND_NONE and EXTEND_PAD if there are only two stops a * Type 2 function is used by itself without a stitching * function. Type 2 functions always have the domain [0 1] */ if ((pattern->base.base.extend == CAIRO_EXTEND_NONE || pattern->base.base.extend == CAIRO_EXTEND_PAD) && gradient->n_stops == 2) { first_stop = 0.0; last_stop = 1.0; } status = _cairo_ps_surface_emit_pattern_stops (surface, &pattern->base); if (status) return status; if (pattern->base.base.extend == CAIRO_EXTEND_REPEAT || pattern->base.base.extend == CAIRO_EXTEND_REFLECT) { status = _cairo_ps_surface_emit_repeating_function (surface, &pattern->base, repeat_begin, repeat_end); if (status) return status; } _cairo_output_stream_printf (surface->stream, "<< /PatternType 2\n" " /Shading\n" " << /ShadingType 2\n" " /ColorSpace /DeviceRGB\n" " /Coords [ %f %f %f %f ]\n" " /Domain [ %f %f ]\n" " /Function CairoFunction\n", x1, y1, x2, y2, first_stop, last_stop); if (extend == CAIRO_EXTEND_PAD) { _cairo_output_stream_printf (surface->stream, " /Extend [ true true ]\n"); } else { _cairo_output_stream_printf (surface->stream, " /Extend [ false false ]\n"); } _cairo_output_stream_printf (surface->stream, " >>\n" ">>\n"); _cairo_output_stream_printf (surface->stream, "[ %f %f %f %f %f %f ]\n", pat_to_ps.xx, pat_to_ps.yx, pat_to_ps.xy, pat_to_ps.yy, pat_to_ps.x0, pat_to_ps.y0); _cairo_output_stream_printf (surface->stream, "makepattern setpattern\n"); return status; } static cairo_status_t _cairo_ps_surface_emit_radial_pattern (cairo_ps_surface_t *surface, cairo_radial_pattern_t *pattern) { double x1, y1, x2, y2, r1, r2; cairo_matrix_t pat_to_ps; cairo_extend_t extend; cairo_status_t status; if (pattern->base.n_stops == 0) return CAIRO_INT_STATUS_NOTHING_TO_DO; if (pattern->base.n_stops == 1) { cairo_solid_pattern_t solid; _cairo_pattern_init_solid (&solid, &pattern->base.stops[0].color, CAIRO_CONTENT_COLOR_ALPHA); _cairo_ps_surface_emit_solid_pattern (surface, &solid); _cairo_pattern_fini (&solid.base); return CAIRO_STATUS_SUCCESS; } extend = cairo_pattern_get_extend (&pattern->base.base); pat_to_ps = pattern->base.base.matrix; status = cairo_matrix_invert (&pat_to_ps); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); cairo_matrix_multiply (&pat_to_ps, &pat_to_ps, &surface->cairo_to_ps); x1 = _cairo_fixed_to_double (pattern->c1.x); y1 = _cairo_fixed_to_double (pattern->c1.y); r1 = _cairo_fixed_to_double (pattern->r1); x2 = _cairo_fixed_to_double (pattern->c2.x); y2 = _cairo_fixed_to_double (pattern->c2.y); r2 = _cairo_fixed_to_double (pattern->r2); status = _cairo_ps_surface_emit_pattern_stops (surface, &pattern->base); if (status) return status; _cairo_output_stream_printf (surface->stream, "<< /PatternType 2\n" " /Shading\n" " << /ShadingType 3\n" " /ColorSpace /DeviceRGB\n" " /Coords [ %f %f %f %f %f %f ]\n" " /Function CairoFunction\n", x1, y1, r1, x2, y2, r2); if (extend == CAIRO_EXTEND_PAD) { _cairo_output_stream_printf (surface->stream, " /Extend [ true true ]\n"); } else { _cairo_output_stream_printf (surface->stream, " /Extend [ false false ]\n"); } _cairo_output_stream_printf (surface->stream, " >>\n" ">>\n"); _cairo_output_stream_printf (surface->stream, "[ %f %f %f %f %f %f ]\n", pat_to_ps.xx, pat_to_ps.yx, pat_to_ps.xy, pat_to_ps.yy, pat_to_ps.x0, pat_to_ps.y0); _cairo_output_stream_printf (surface->stream, "makepattern setpattern\n"); return status; } static cairo_status_t _cairo_ps_surface_emit_pattern (cairo_ps_surface_t *surface, cairo_pattern_t *pattern, cairo_operator_t op) { cairo_status_t status; if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) { cairo_solid_pattern_t *solid = (cairo_solid_pattern_t *) pattern; if (surface->current_pattern_is_solid_color == FALSE || ! _cairo_color_equal (&surface->current_color, &solid->color)) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_ps_surface_emit_solid_pattern (surface, (cairo_solid_pattern_t *) pattern); surface->current_pattern_is_solid_color = TRUE; surface->current_color = solid->color; } return CAIRO_STATUS_SUCCESS; } surface->current_pattern_is_solid_color = FALSE; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; switch (pattern->type) { case CAIRO_PATTERN_TYPE_SOLID: _cairo_ps_surface_emit_solid_pattern (surface, (cairo_solid_pattern_t *) pattern); break; case CAIRO_PATTERN_TYPE_SURFACE: status = _cairo_ps_surface_emit_surface_pattern (surface, (cairo_surface_pattern_t *) pattern, op); if (status) return status; break; case CAIRO_PATTERN_TYPE_LINEAR: status = _cairo_ps_surface_emit_linear_pattern (surface, (cairo_linear_pattern_t *) pattern); if (status) return status; break; case CAIRO_PATTERN_TYPE_RADIAL: status = _cairo_ps_surface_emit_radial_pattern (surface, (cairo_radial_pattern_t *) pattern); if (status) return status; break; } return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_ps_surface_intersect_clip_path (void *abstract_surface, cairo_path_fixed_t *path, cairo_fill_rule_t fill_rule, double tolerance, cairo_antialias_t antialias) { cairo_ps_surface_t *surface = abstract_surface; cairo_output_stream_t *stream = surface->stream; cairo_status_t status; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return CAIRO_STATUS_SUCCESS; #if DEBUG_PS _cairo_output_stream_printf (stream, "%% _cairo_ps_surface_intersect_clip_path\n"); #endif if (path == NULL) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (stream, "Q q\n"); surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); return CAIRO_STATUS_SUCCESS; } return _cairo_pdf_operators_clip (&surface->pdf_operators, path, fill_rule); } static cairo_int_status_t _cairo_ps_surface_get_extents (void *abstract_surface, cairo_rectangle_int_t *rectangle) { cairo_ps_surface_t *surface = abstract_surface; rectangle->x = 0; rectangle->y = 0; /* XXX: The conversion to integers here is pretty bogus, (not to * mention the aribitray limitation of width to a short(!). We * may need to come up with a better interface for get_extents. */ rectangle->width = (int) ceil (surface->width); rectangle->height = (int) ceil (surface->height); return CAIRO_STATUS_SUCCESS; } static void _cairo_ps_surface_get_font_options (void *abstract_surface, cairo_font_options_t *options) { _cairo_font_options_init_default (options); cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE); cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF); cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY); } static cairo_int_status_t _cairo_ps_surface_paint (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source) { cairo_ps_surface_t *surface = abstract_surface; cairo_output_stream_t *stream = surface->stream; cairo_rectangle_int_t extents; cairo_status_t status; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return _cairo_ps_surface_analyze_operation (surface, op, source); assert (_cairo_ps_surface_operation_supported (surface, op, source)); #if DEBUG_PS _cairo_output_stream_printf (stream, "%% _cairo_ps_surface_paint\n"); #endif status = _cairo_surface_get_extents (&surface->base, &extents); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; if (source->type == CAIRO_PATTERN_TYPE_SURFACE && (source->extend == CAIRO_EXTEND_NONE || source->extend == CAIRO_EXTEND_PAD)) { _cairo_output_stream_printf (stream, "q 0 0 %d %d rectclip\n", extents.width, extents.height); status = _cairo_ps_surface_paint_surface (surface, (cairo_surface_pattern_t *) source, op); if (status) return status; _cairo_output_stream_printf (stream, "Q\n"); } else { status = _cairo_ps_surface_emit_pattern (surface, source, op); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; _cairo_output_stream_printf (stream, "0 0 %d %d rectfill\n", extents.width, extents.height); } return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_ps_surface_stroke (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, cairo_path_fixed_t *path, cairo_stroke_style_t *style, cairo_matrix_t *ctm, cairo_matrix_t *ctm_inverse, double tolerance, cairo_antialias_t antialias) { cairo_ps_surface_t *surface = abstract_surface; cairo_int_status_t status; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return _cairo_ps_surface_analyze_operation (surface, op, source); assert (_cairo_ps_surface_operation_supported (surface, op, source)); #if DEBUG_PS _cairo_output_stream_printf (surface->stream, "%% _cairo_ps_surface_stroke\n"); #endif status = _cairo_ps_surface_emit_pattern (surface, source, op); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; return _cairo_pdf_operators_stroke (&surface->pdf_operators, path, style, ctm, ctm_inverse); } static cairo_int_status_t _cairo_ps_surface_fill (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, cairo_path_fixed_t *path, cairo_fill_rule_t fill_rule, double tolerance, cairo_antialias_t antialias) { cairo_ps_surface_t *surface = abstract_surface; cairo_int_status_t status; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return _cairo_ps_surface_analyze_operation (surface, op, source); assert (_cairo_ps_surface_operation_supported (surface, op, source)); #if DEBUG_PS _cairo_output_stream_printf (surface->stream, "%% _cairo_ps_surface_fill\n"); #endif if (source->type == CAIRO_PATTERN_TYPE_SURFACE && (source->extend == CAIRO_EXTEND_NONE || source->extend == CAIRO_EXTEND_PAD)) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->stream, "q\n"); status = _cairo_pdf_operators_clip (&surface->pdf_operators, path, fill_rule); if (status) return status; status = _cairo_ps_surface_paint_surface (surface, (cairo_surface_pattern_t *) source, op); if (status) return status; _cairo_output_stream_printf (surface->stream, "Q\n"); _cairo_pdf_operators_reset (&surface->pdf_operators); } else { status = _cairo_ps_surface_emit_pattern (surface, source, op); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; status = _cairo_pdf_operators_fill (&surface->pdf_operators, path, fill_rule); } return status; } static cairo_int_status_t _cairo_ps_surface_show_glyphs (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, cairo_glyph_t *glyphs, int num_glyphs, cairo_scaled_font_t *scaled_font, int *remaining_glyphs) { cairo_ps_surface_t *surface = abstract_surface; cairo_status_t status; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return _cairo_ps_surface_analyze_operation (surface, op, source); assert (_cairo_ps_surface_operation_supported (surface, op, source)); #if DEBUG_PS _cairo_output_stream_printf (surface->stream, "%% _cairo_ps_surface_show_glyphs\n"); #endif if (num_glyphs <= 0) return CAIRO_STATUS_SUCCESS; status = _cairo_ps_surface_emit_pattern (surface, source, op); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; return _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators, NULL, 0, glyphs, num_glyphs, NULL, 0, FALSE, scaled_font); } static void _cairo_ps_surface_set_paginated_mode (void *abstract_surface, cairo_paginated_mode_t paginated_mode) { cairo_ps_surface_t *surface = abstract_surface; surface->paginated_mode = paginated_mode; } static cairo_int_status_t _cairo_ps_surface_set_bounding_box (void *abstract_surface, cairo_box_t *bbox) { cairo_ps_surface_t *surface = abstract_surface; int i, num_comments; char **comments; int x1, y1, x2, y2; if (surface->eps) { x1 = (int) floor (_cairo_fixed_to_double (bbox->p1.x)); y1 = (int) floor (surface->height - _cairo_fixed_to_double (bbox->p2.y)); x2 = (int) ceil (_cairo_fixed_to_double (bbox->p2.x)); y2 = (int) ceil (surface->height - _cairo_fixed_to_double (bbox->p1.y)); } else { x1 = 0; y1 = 0; x2 = (int) ceil (surface->width); y2 = (int) ceil (surface->height); } _cairo_output_stream_printf (surface->stream, "%%%%Page: %d %d\n", surface->num_pages, surface->num_pages); _cairo_output_stream_printf (surface->stream, "%%%%BeginPageSetup\n"); num_comments = _cairo_array_num_elements (&surface->dsc_page_setup_comments); comments = _cairo_array_index (&surface->dsc_page_setup_comments, 0); for (i = 0; i < num_comments; i++) { _cairo_output_stream_printf (surface->stream, "%s\n", comments[i]); free (comments[i]); comments[i] = NULL; } _cairo_array_truncate (&surface->dsc_page_setup_comments, 0); _cairo_output_stream_printf (surface->stream, "%%%%PageBoundingBox: %d %d %d %d\n", x1, y1, x2, y2); _cairo_output_stream_printf (surface->stream, "%%%%EndPageSetup\n" "q\n"); if (surface->num_pages == 1) { surface->bbox_x1 = x1; surface->bbox_y1 = y1; surface->bbox_x2 = x2; surface->bbox_y2 = y2; } else { if (x1 < surface->bbox_x1) surface->bbox_x1 = x1; if (y1 < surface->bbox_y1) surface->bbox_y1 = y1; if (x2 > surface->bbox_x2) surface->bbox_x2 = x2; if (y2 > surface->bbox_y2) surface->bbox_y2 = y2; } surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); return _cairo_output_stream_get_status (surface->stream); } static cairo_bool_t _cairo_ps_surface_supports_fine_grained_fallbacks (void *abstract_surface) { return TRUE; } static const cairo_surface_backend_t cairo_ps_surface_backend = { CAIRO_SURFACE_TYPE_PS, _cairo_ps_surface_create_similar, _cairo_ps_surface_finish, NULL, /* acquire_source_image */ NULL, /* release_source_image */ NULL, /* acquire_dest_image */ NULL, /* release_dest_image */ NULL, /* clone_similar */ NULL, /* composite */ NULL, /* fill_rectangles */ NULL, /* composite_trapezoids */ NULL, /* cairo_ps_surface_copy_page */ _cairo_ps_surface_show_page, NULL, /* set_clip_region */ _cairo_ps_surface_intersect_clip_path, _cairo_ps_surface_get_extents, NULL, /* old_show_glyphs */ _cairo_ps_surface_get_font_options, NULL, /* flush */ NULL, /* mark_dirty_rectangle */ NULL, /* scaled_font_fini */ NULL, /* scaled_glyph_fini */ /* Here are the drawing functions */ _cairo_ps_surface_paint, /* paint */ NULL, /* mask */ _cairo_ps_surface_stroke, _cairo_ps_surface_fill, _cairo_ps_surface_show_glyphs, NULL, /* snapshot */ }; static const cairo_paginated_surface_backend_t cairo_ps_surface_paginated_backend = { _cairo_ps_surface_start_page, _cairo_ps_surface_set_paginated_mode, _cairo_ps_surface_set_bounding_box, NULL, /* _cairo_ps_surface_has_fallback_images, */ _cairo_ps_surface_supports_fine_grained_fallbacks, };