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author | John Tytgat <joty@netsurf-browser.org> | 2008-07-26 16:01:59 +0000 |
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committer | John Tytgat <joty@netsurf-browser.org> | 2008-07-26 16:01:59 +0000 |
commit | 35d3d6d0bb16abeeb6aad2fd0398c8e68a40d414 (patch) | |
tree | 9967569fb69077f96f6f7e63998001c673dd82c5 /pdf/font_haru.c | |
parent | 9fb65c709676d5b665ba0bd8aeb706ce28de46ea (diff) | |
download | netsurf-35d3d6d0bb16abeeb6aad2fd0398c8e68a40d414.tar.gz netsurf-35d3d6d0bb16abeeb6aad2fd0398c8e68a40d414.tar.bz2 |
First merge of Adam Blokus' GSoC work from his branch 'branches/adamblokus/netsurf'.
Merged revisions 4212-4552,4554-4709,4711-4724 via svnmerge from
svn://svn.netsurf-browser.org/branches/adamblokus/netsurf
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r4212 | adamblokus | 2008-05-26 19:42:31 +0200 (Mon, 26 May 2008) | 4 lines
Pdf plotting skeleton pinned on Print Preview in GTK.
Just creates a file and draws lines.
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r4213 | adamblokus | 2008-05-27 00:11:03 +0200 (Tue, 27 May 2008) | 4 lines
Pdf plotter - added drawing some graphic primitives.
Still with limited functionality, but a snapshot of the
currently viewed page can be made and resembles the original.
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r4214 | adamblokus | 2008-05-27 11:43:31 +0200 (Tue, 27 May 2008) | 2 lines
Corrected encoding name
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r4215 | adamblokus | 2008-05-27 12:47:26 +0200 (Tue, 27 May 2008) | 3 lines
Colours and polygons added.
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r4217 | adamblokus | 2008-05-27 21:39:35 +0200 (Tue, 27 May 2008) | 6 lines
Added rectangles, filled boxes and clipping.
Taken into consideration joty's comments.
Added a todo list for this part.
Added some debug stuff and checking boundaries.
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r4218 | adamblokus | 2008-05-28 12:37:30 +0200 (Wed, 28 May 2008) | 2 lines
Added path ploting (not sure if valid argument order for bezier) and dashed/dotted line styles
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r4221 | adamblokus | 2008-05-28 22:11:05 +0200 (Wed, 28 May 2008) | 3 lines
Some more options in graphic primitives and normalizing some parameters.
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r4235 | adamblokus | 2008-05-31 22:54:56 +0200 (Sat, 31 May 2008) | 4 lines
Plotting changed as jmb suggested (is the least invasive one from the possible)
Added dummy bitmap plotting - way of plotting an image is determined by its type.
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r4251 | adamblokus | 2008-06-03 17:12:15 +0200 (Tue, 03 Jun 2008) | 3 lines
Added plotting jpg and png images - quite a lot to improve in this code, but it seems to work ;)
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r4263 | adamblokus | 2008-06-05 14:20:32 +0200 (Thu, 05 Jun 2008) | 3 lines
Added hadling images other than png and jpeg - with transparency.
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r4267 | adamblokus | 2008-06-06 15:36:34 +0200 (Fri, 06 Jun 2008) | 5 lines
Added handling NULL-returns from all mallocs.
Added plot_bitmap_tile handling.
Changed code style a little.
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r4327 | adamblokus | 2008-06-12 17:46:34 +0200 (Thu, 12 Jun 2008) | 5 lines
Added a first prototype of the paged-output organization.
Still not sure about naming, file locations etc.
Works with the same pdf plotting as before.
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r4328 | adamblokus | 2008-06-13 13:52:15 +0200 (Fri, 13 Jun 2008) | 4 lines
Added primitive width adjustment and outputing the whole
website in multiple pages.
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r4336 | joty | 2008-06-15 15:06:57 +0200 (Sun, 15 Jun 2008) | 1 line
Fix RISC OS build failure (change r4235 wasn't complete).
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r4337 | joty | 2008-06-15 18:15:32 +0200 (Sun, 15 Jun 2008) | 16 lines
This enables "Export PDF" in RISC OS build:
- Docs/Doxyfile(PREDEFINED): Added WITH_PDF_EXPORT
- Makefile.sources(S_PDF): Add to RISC OS target as well.
- utils/config.h: Define WITH_PDF_EXPORT which controls if we want to have
PDF export functionality or not.
- riscos/save_pdf.c,riscos/save_pdf.h(save_as_pdf): Use PDF print API made
by Adam Blokus to write a PDF file under RISC OS.
- riscos/save.c: Call save_as_pdf added.
- riscos/menus.c: Add 'Export->PDF' menu entry.
- riscos/menus.h(menu_action): Added BROWSER_EXPORT_PDF.
- desktop/gui.h(gui_save_type): Added GUI_SAVE_PDF.
- desktop/print.c(print_run): Added return value.
- Makefile(CCACHE): Moved closed to the place where CC is set for the first time.
(LDFLAGS): Centralised adding all non-pkgconfig libraries and added Haru + PNG libs.
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r4343 | adamblokus | 2008-06-16 01:08:52 +0200 (Mon, 16 Jun 2008) | 3 lines
Added margins and page size adjustment.
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r4412 | adamblokus | 2008-06-21 20:22:07 +0200 (Sat, 21 Jun 2008) | 4 lines
Added 'fuzzy' margins on page bottom.
Disabled direct png embedding, because it is too unstable in Haru now.
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r4421 | adamblokus | 2008-06-22 18:52:28 +0200 (Sun, 22 Jun 2008) | 2 lines
Added "Save as.." dialog and Export->PDF menu entry. Print preview still works with default path.
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r4437 | adamblokus | 2008-06-25 02:44:46 +0200 (Wed, 25 Jun 2008) | 4 lines
Added skeleton of applying loose layout.
Minor code cleaning-up.
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r4492 | adamblokus | 2008-07-02 09:02:42 +0200 (Wed, 02 Jul 2008) | 5 lines
Implemented the elementar ideas of the loose layout.
Added scaling in the printing routine.
Added some basic demonstrations.
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r4493 | adamblokus | 2008-07-02 09:05:55 +0200 (Wed, 02 Jul 2008) | 3 lines
Cleaned up the loosing code - commited to much of leftover rubbish code.
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r4507 | adamblokus | 2008-07-04 14:25:48 +0200 (Fri, 04 Jul 2008) | 4 lines
Added duplicating box tree and current content - window flickering during printing solved.
Minor error checking after new HPDF_Image_AddSMask call.
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r4515 | adamblokus | 2008-07-06 22:28:16 +0200 (Sun, 06 Jul 2008) | 2 lines
Changes in loosen layout (image resizing).
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r4517 | adamblokus | 2008-07-06 22:38:23 +0200 (Sun, 06 Jul 2008) | 2 lines
Added pdf font handling and rendering functions with the use of Haru functions.
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r4555 | adamblokus | 2008-07-10 00:59:05 +0200 (Thu, 10 Jul 2008) | 2 lines
Added a very basic and still buggy GTK print implementation.
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r4565 | adamblokus | 2008-07-10 14:50:16 +0200 (Thu, 10 Jul 2008) | 2 lines
Added gtk printing one more time - I have forgotten to add the main file.
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r4566 | adamblokus | 2008-07-10 14:57:02 +0200 (Thu, 10 Jul 2008) | 2 lines
removed error with comment
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r4569 | adamblokus | 2008-07-10 15:52:55 +0200 (Thu, 10 Jul 2008) | 5 lines
Major style improvements - added a lot of doxygen comments,
followed tlsa's style guide.
Added some more error checking, too.
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r4575 | adamblokus | 2008-07-10 18:48:26 +0200 (Thu, 10 Jul 2008) | 2 lines
Cleaned up the code.
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r4687 | adamblokus | 2008-07-17 14:17:19 +0200 (Thu, 17 Jul 2008) | 2 lines
Changed everything according to jmb's review plus some minor bug fixes to gtk_print.
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r4688 | adamblokus | 2008-07-17 17:16:34 +0200 (Thu, 17 Jul 2008) | 2 lines
Solved the netsurf.glade clash from r4421.
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r4693 | adamblokus | 2008-07-18 18:11:51 +0200 (Fri, 18 Jul 2008) | 2 lines
Fixed bug with wrong number of pages in gtk printing.
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r4695 | adamblokus | 2008-07-18 19:59:24 +0200 (Fri, 18 Jul 2008) | 3 lines
- fixed uncommented line from the previous commit
- fixed bug with scale bigger than 1.0 (incorretly clipped page)
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r4696 | adamblokus | 2008-07-18 23:28:00 +0200 (Fri, 18 Jul 2008) | 2 lines
Fixed bug in gtk_print_font_paint (and nsfont_paint).
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r4697 | adamblokus | 2008-07-18 23:35:38 +0200 (Fri, 18 Jul 2008) | 2 lines
Bug fix in nsfont_paint.
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r4711 | adamblokus | 2008-07-19 22:44:15 +0200 (Sat, 19 Jul 2008) | 2 lines
Added gtk_selection files.
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r4712 | adamblokus | 2008-07-20 11:15:06 +0200 (Sun, 20 Jul 2008) | 2 lines
Addam missing glade files.
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r4713 | joty | 2008-07-20 17:13:10 +0200 (Sun, 20 Jul 2008) | 1 line
Follow change r4517 for RISC OS and BeOS platforms : Added pdf font handling and rendering functions with the use of Haru functions.
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r4714 | joty | 2008-07-20 18:19:50 +0200 (Sun, 20 Jul 2008) | 1 line
Declare haru_nsfont iso define an instance for each C source including the font_haru.h header. This fixes breakage of PDF export on RISC OS.
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r4724 | adamblokus | 2008-07-23 03:30:08 +0200 (Wed, 23 Jul 2008) | 6 lines
Applied changes according to joty's review.
Added checking the dimensions of a plotted image to pdf plotter.
Commented out jpg embedding (it seems to cause some problems
I'll bring it back when I figure out what's wrong) .
Added back some files removed by mistake.
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svn path=/trunk/netsurf/; revision=4741
Diffstat (limited to 'pdf/font_haru.c')
-rw-r--r-- | pdf/font_haru.c | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/pdf/font_haru.c b/pdf/font_haru.c new file mode 100644 index 000000000..045d481a2 --- /dev/null +++ b/pdf/font_haru.c @@ -0,0 +1,373 @@ +/* + * Copyright 2008 Adam Blokus <adamblokus@gmail.com> + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * NetSurf is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + + /** \file + * Font handling in Haru pdf documents (implementation). + * + * The functions were written to implement the same interface as the Pango ones + * so that the usage of the latter wouldn't have to be modified. + */ + +#define FONT_HARU_DEBUG + +#include <assert.h> +#include <float.h> +#include <math.h> +#include <string.h> + +#include "css/css.h" +#include "hpdf.h" +#include "render/font.h" +#include "pdf/font_haru.h" +#include "utils/log.h" + + +static bool haru_nsfont_init(HPDF_Doc *pdf, HPDF_Page *page, + const char *string, char **string_nt, int length); + +static bool haru_nsfont_width(const struct css_style *style, + const char *string, size_t length, + int *width); + +static bool haru_nsfont_position_in_string(const struct css_style *style, + const char *string, size_t length, + int x, size_t *char_offset, int *actual_x); + +static bool haru_nsfont_split(const struct css_style *style, + const char *string, size_t length, + int x, size_t *char_offset, int *actual_x); + + +const struct font_functions haru_nsfont = { + haru_nsfont_width, + haru_nsfont_position_in_string, + haru_nsfont_split +}; + + +/** + * Haru error handler + * for debugging purposes - it immediately exits the program on the first error, + * as it would otherwise flood the user with all resulting complications, + * covering the most important error source. + */ +static void error_handler(HPDF_STATUS error_no, + HPDF_STATUS detail_no, + void *user_data) +{ + LOG(("ERROR: in font_haru \n\terror_no=%x\n\tdetail_no=%d\n", + (HPDF_UINT)error_no, + (HPDF_UINT)detail_no)); +#ifdef FONT_HARU_DEBUG + exit(1); +#endif +} + +static bool haru_nsfont_init(HPDF_Doc *pdf, HPDF_Page *page, + const char *string, char **string_nt, int length) +{ + + *pdf = HPDF_New(error_handler, NULL); + + if (*pdf == NULL) + return false; + + *page = HPDF_AddPage(*pdf); + + if (*page == NULL) { + HPDF_Free(*pdf); + return false; + } + + *string_nt = malloc((length + 1) * sizeof(char)); + if (*string_nt == NULL) { + HPDF_Free(*pdf); + return false; + } + + memcpy(*string_nt, string, length); + (*string_nt)[length] = '\0'; + return true; +} + +/** + * Measure the width of a string. + * + * \param style css_style for this text, with style->font_size.size == + * CSS_FONT_SIZE_LENGTH + * \param string string to measure (no UTF-8 currently) + * \param length length of string + * \param width updated to width of string[0..length] + * \return true on success, false on error and error reported + */ +bool haru_nsfont_width(const struct css_style *style, + const char *string, size_t length, + int *width) +{ + HPDF_Doc pdf; + HPDF_Page page; + char *string_nt; + HPDF_REAL width_real; + + if (length == 0) { + *width = 0; + return true; + } + + if (!haru_nsfont_init(&pdf, &page, string, &string_nt, length)) + return false; + + if (!haru_nsfont_apply_style(style, pdf, page, NULL)) { + free(string_nt); + HPDF_Free(pdf); + return false; + } + + width_real = HPDF_Page_TextWidth(page, string_nt); + *width = width_real; + +#ifdef FONT_HARU_DEBUG + LOG(("Measuring string: %s ; Calculated width: %f %i",string_nt, width_real, *width)); +#endif + free(string_nt); + HPDF_Free(pdf); + + + return true; +} + + +/** + * Find the position in a string where an x coordinate falls. + * + * \param style css_style for this text, with style->font_size.size == + * CSS_FONT_SIZE_LENGTH + * \param string string to measure (no UTF-8 currently) + * \param length length of string + * \param x x coordinate to search for + * \param char_offset updated to offset in string of actual_x, [0..length] + * \param actual_x updated to x coordinate of character closest to x + * \return true on success, false on error and error reported + */ + +bool haru_nsfont_position_in_string(const struct css_style *style, + const char *string, size_t length, + int x, size_t *char_offset, int *actual_x) +{ + HPDF_Doc pdf; + HPDF_Page page; + char *string_nt; + HPDF_UINT offset; + HPDF_REAL real_width; + HPDF_REAL width; + + + if (!haru_nsfont_init(&pdf, &page, string, &string_nt, length)) + return false; + + if (!HPDF_Page_SetWidth(page, x) + || !haru_nsfont_apply_style(style, pdf, page, NULL)) { + free(string_nt); + HPDF_Free(pdf); + return false; + } + + + offset = HPDF_Page_MeasureText(page, string_nt, x, + HPDF_FALSE, &real_width); + + + if (real_width < x) + *char_offset = offset; + else { + assert(fabs(real_width - x) < FLT_EPSILON); + assert(offset > 0); + *char_offset = offset - 1; + } + + /*TODO: this is only the right edge of the character*/ + *actual_x = real_width; + +#ifdef FONT_HARU_DEBUG + LOG(("Position in string: %s at x: %i; Calculated position: %i", + string_nt, x, *char_offset)); +#endif + free(string_nt); + HPDF_Free(pdf); + + return true; +} + +/** + * Find where to split a string to make it fit a width. + * + * \param style css_style for this text, with style->font_size.size == + * CSS_FONT_SIZE_LENGTH + * \param string string to measure (no UTF-8 currently) + * \param length length of string + * \param x width available + * \param char_offset updated to offset in string of actual_x, [0..length] + * \param actual_x updated to x coordinate of character closest to x + * \return true on success, false on error and error reported + */ + +bool haru_nsfont_split(const struct css_style *style, + const char *string, size_t length, + int x, size_t *char_offset, int *actual_x) +{ + HPDF_Doc pdf; + HPDF_Page page; + char *string_nt; + HPDF_REAL real_width; + HPDF_UINT offset; + + + if (!haru_nsfont_init(&pdf, &page, string, &string_nt, length)) + return false; + + if (!HPDF_Page_SetWidth(page, x) + || !haru_nsfont_apply_style(style, pdf, page, NULL)) { + free(string_nt); + HPDF_Free(pdf); + return false; + } + + offset = HPDF_Page_MeasureText(page, string_nt, x, + HPDF_TRUE, &real_width); + +#ifdef FONT_HARU_DEBUG + LOG(("Splitting string: %s for width: %i ; Calculated position: %i Calculated real_width: %f", + string_nt, x, *char_offset, real_width)); +#endif + *char_offset = offset - 1; + + /*TODO: this is only the right edge of the character*/ + *actual_x = real_width; + + free(string_nt); + HPDF_Free(pdf); + + return true; +} + +/** + * Apply css_style to a Haru HPDF_Page + * + * \param style css_style for this page, with style->font_size.size == + * CSS_FONT_SIZE_LENGTH + * \param doc document owning the page + * \param page the page to apply the style to + * \param font if this is not NULL it is updated to the font from the + * style and nothing with the page is done + * \return true on success, false on error and error reported + */ + +bool haru_nsfont_apply_style(const struct css_style *style, + HPDF_Doc doc, HPDF_Page page, + HPDF_Font *font) +{ + + HPDF_Font pdf_font; + HPDF_REAL size; + char font_name[50]; + bool roman; + bool bold; + bool styled; + + roman = false; + bold = false; + styled = false; + + + /*TODO: style handling, we are mapping the + styles on the basic 14 fonts only + */ + switch (style->font_family) { + case CSS_FONT_FAMILY_SERIF: + strcpy(font_name, "Times"); + roman = true; + break; + case CSS_FONT_FAMILY_MONOSPACE: + strcpy(font_name, "Courier"); + break; + case CSS_FONT_FAMILY_SANS_SERIF: + strcpy(font_name, "Helvetica"); + break; + case CSS_FONT_FAMILY_CURSIVE: + case CSS_FONT_FAMILY_FANTASY: + default: + strcpy(font_name, "Times"); + roman=true; + break; + } + + if (style->font_weight == CSS_FONT_WEIGHT_BOLD){ + strcat(font_name, "-Bold"); + bold = true; + } + + + + + switch (style->font_style) { + case CSS_FONT_STYLE_ITALIC: + case CSS_FONT_STYLE_OBLIQUE: + if (!bold) strcat(font_name,"-"); + if (roman) + strcat(font_name,"Italic"); + else + strcat(font_name,"Oblique"); + + styled = true; + break; + default: + break; + } + + if (roman && !styled && !bold) + strcat(font_name, "-Roman"); + +#ifdef FONT_HARU_DEBUG + LOG(("Setting font: %s", font_name)); +#endif + + if (font != NULL) { + pdf_font = HPDF_GetFont(doc, font_name, "StandardEncoding"); + if (pdf_font == NULL) + return false; + *font = pdf_font; + } + else { + + if (style->font_size.value.length.unit == CSS_UNIT_PX) + size = style->font_size.value.length.value; + else + size = css_len2pt(&style->font_size.value.length, style); + + /*with 0.7 the pages look the best, this should be kept the same + as the scale in print settings*/ + size = size / 0.7; + + pdf_font = HPDF_GetFont(doc, font_name, "StandardEncoding"); + if (pdf_font == NULL) + return false; + HPDF_Page_SetFontAndSize(page, pdf_font, size); + } + + return true; +} |