netsurf/gtk/gtk_plotters.c
John Tytgat 35d3d6d0bb 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

........
  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. 
........
  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.
........
  r4214 | adamblokus | 2008-05-27 11:43:31 +0200 (Tue, 27 May 2008) | 2 lines
  
  Corrected encoding name
........
  r4215 | adamblokus | 2008-05-27 12:47:26 +0200 (Tue, 27 May 2008) | 3 lines
  
  Colours and polygons added.
........
  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.
........
  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
........
  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.
........
  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. 
........
  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 ;)
........
  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.
........
  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.
........
  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.
........
  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).
........
  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.
........
  r4343 | adamblokus | 2008-06-16 01:08:52 +0200 (Mon, 16 Jun 2008) | 3 lines
  
  Added margins and page size adjustment.
........
  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.
........
  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.
........
  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.
........
  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.
........
  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.
........
  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.
........
  r4515 | adamblokus | 2008-07-06 22:28:16 +0200 (Sun, 06 Jul 2008) | 2 lines
  
  Changes in loosen layout (image resizing).
........
  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.
........
  r4575 | adamblokus | 2008-07-10 18:48:26 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Cleaned up the code.
........
  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.
........
  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.
........
  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)
........
  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).
........
  r4697 | adamblokus | 2008-07-18 23:35:38 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Bug fix in nsfont_paint.
........
  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.
........
  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.
........
  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.
........


svn path=/trunk/netsurf/; revision=4741
2008-07-26 16:01:59 +00:00

494 lines
12 KiB
C

/*
* Copyright 2006 Rob Kendrick <rjek@rjek.com>
* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
*
* 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
* Target independent plotting (GDK / GTK+ and Cairo implementation).
* Can use either GDK drawing primitives (which are mostly passed straight
* to X to process, and thus accelerated) or Cairo drawing primitives (much
* higher quality, not accelerated). Cairo's fast enough, so it defaults
* to using it if it is available. It does this by checking for the
* CAIRO_VERSION define that the cairo headers set.
*/
#include <math.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include "desktop/plotters.h"
#include "gtk/font_pango.h"
#include "gtk/gtk_plotters.h"
#include "gtk/gtk_scaffolding.h"
#include "render/font.h"
#include "utils/log.h"
#include "desktop/options.h"
#include "gtk/options.h"
#include "gtk/gtk_bitmap.h"
#ifndef CAIRO_VERSION
#error "nsgtk requires cairo"
#endif
GtkWidget *current_widget;
GdkDrawable *current_drawable;
GdkGC *current_gc;
cairo_t *current_cr;
static bool nsgtk_plot_clg(colour c);
static bool nsgtk_plot_rectangle(int x0, int y0, int width, int height,
int line_width, colour c, bool dotted, bool dashed);
static bool nsgtk_plot_line(int x0, int y0, int x1, int y1, int width,
colour c, bool dotted, bool dashed);
static bool nsgtk_plot_polygon(int *p, unsigned int n, colour fill);
static bool nsgtk_plot_path(float *p, unsigned int n, colour fill, float width,
colour c, float *transform);
static bool nsgtk_plot_fill(int x0, int y0, int x1, int y1, colour c);
static bool nsgtk_plot_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1);
static bool nsgtk_plot_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c);
static bool nsgtk_plot_disc(int x, int y, int radius, colour c, bool filled);
static bool nsgtk_plot_arc(int x, int y, int radius, int angle1, int angle2,
colour c);
static bool nsgtk_plot_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg, struct content *content);
static bool nsgtk_plot_bitmap_tile(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
bool repeat_x, bool repeat_y, struct content *content);
static void nsgtk_set_solid(void); /**< Set for drawing solid lines */
static void nsgtk_set_dotted(void); /**< Set for drawing dotted lines */
static void nsgtk_set_dashed(void); /**< Set for drawing dashed lines */
static GdkRectangle cliprect;
static float nsgtk_plot_scale = 1.0;
struct plotter_table plot;
const struct plotter_table nsgtk_plotters = {
nsgtk_plot_clg,
nsgtk_plot_rectangle,
nsgtk_plot_line,
nsgtk_plot_polygon,
nsgtk_plot_fill,
nsgtk_plot_clip,
nsgtk_plot_text,
nsgtk_plot_disc,
nsgtk_plot_arc,
nsgtk_plot_bitmap,
nsgtk_plot_bitmap_tile,
NULL,
NULL,
NULL,
nsgtk_plot_path
};
bool nsgtk_plot_clg(colour c)
{
return true;
}
bool nsgtk_plot_rectangle(int x0, int y0, int width, int height,
int line_width, colour c, bool dotted, bool dashed)
{
nsgtk_set_colour(c);
if (dotted)
nsgtk_set_dotted();
else if (dashed)
nsgtk_set_dashed();
else
nsgtk_set_solid();
if (line_width == 0)
line_width = 1;
cairo_set_line_width(current_cr, line_width);
cairo_rectangle(current_cr, x0, y0, width, height);
cairo_stroke(current_cr);
return true;
}
bool nsgtk_plot_line(int x0, int y0, int x1, int y1, int width,
colour c, bool dotted, bool dashed)
{
nsgtk_set_colour(c);
if (dotted)
nsgtk_set_dotted();
else if (dashed)
nsgtk_set_dashed();
else
nsgtk_set_solid();
if (width == 0)
width = 1;
cairo_set_line_width(current_cr, width);
cairo_move_to(current_cr, x0, y0 - 0.5);
cairo_line_to(current_cr, x1, y1 - 0.5);
cairo_stroke(current_cr);
return true;
}
bool nsgtk_plot_polygon(int *p, unsigned int n, colour fill)
{
unsigned int i;
nsgtk_set_colour(fill);
nsgtk_set_solid();
cairo_set_line_width(current_cr, 0);
cairo_move_to(current_cr, p[0], p[1]);
for (i = 1; i != n; i++) {
cairo_line_to(current_cr, p[i * 2], p[i * 2 + 1]);
}
cairo_fill(current_cr);
cairo_stroke(current_cr);
return true;
}
bool nsgtk_plot_fill(int x0, int y0, int x1, int y1, colour c)
{
nsgtk_set_colour(c);
nsgtk_set_solid();
cairo_set_line_width(current_cr, 0);
cairo_rectangle(current_cr, x0, y0, x1 - x0, y1 - y0);
cairo_fill(current_cr);
cairo_stroke(current_cr);
return true;
}
bool nsgtk_plot_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1)
{
cairo_reset_clip(current_cr);
cairo_rectangle(current_cr, clip_x0, clip_y0,
clip_x1 - clip_x0, clip_y1 - clip_y0);
cairo_clip(current_cr);
cliprect.x = clip_x0;
cliprect.y = clip_y0;
cliprect.width = clip_x1 - clip_x0;
cliprect.height = clip_y1 - clip_y0;
gdk_gc_set_clip_rectangle(current_gc, &cliprect);
return true;
}
bool nsgtk_plot_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c)
{
return nsfont_paint(style, text, length, x, y, c);
}
bool nsgtk_plot_disc(int x, int y, int radius, colour c, bool filled)
{
nsgtk_set_colour(c);
nsgtk_set_solid();
if (filled)
cairo_set_line_width(current_cr, 0);
else
cairo_set_line_width(current_cr, 1);
cairo_arc(current_cr, x, y, radius, 0, M_PI * 2);
if (filled)
cairo_fill(current_cr);
cairo_stroke(current_cr);
return true;
}
bool nsgtk_plot_arc(int x, int y, int radius, int angle1, int angle2, colour c)
{
nsgtk_set_colour(c);
nsgtk_set_solid();
cairo_set_line_width(current_cr, 1);
cairo_arc(current_cr, x, y, radius,
(angle1 + 90) * (M_PI / 180),
(angle2 + 90) * (M_PI / 180));
cairo_stroke(current_cr);
return true;
}
static bool nsgtk_plot_pixbuf(int x, int y, int width, int height,
GdkPixbuf *pixbuf, colour bg)
{
/* XXX: This currently ignores the background colour supplied.
* Does this matter?
*/
if (width == 0 || height == 0)
return true;
if (gdk_pixbuf_get_width(pixbuf) == width &&
gdk_pixbuf_get_height(pixbuf) == height) {
gdk_draw_pixbuf(current_drawable, current_gc,
pixbuf,
0, 0,
x, y,
width, height,
GDK_RGB_DITHER_MAX, 0, 0);
} else {
GdkPixbuf *scaled;
scaled = gdk_pixbuf_scale_simple(pixbuf,
width, height,
option_render_resample ? GDK_INTERP_BILINEAR
: GDK_INTERP_NEAREST);
if (!scaled)
return false;
gdk_draw_pixbuf(current_drawable, current_gc,
scaled,
0, 0,
x, y,
width, height,
GDK_RGB_DITHER_MAX, 0, 0);
g_object_unref(scaled);
}
return true;
}
bool nsgtk_plot_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg, struct content *content)
{
GdkPixbuf *pixbuf = gtk_bitmap_get_primary(bitmap);
return nsgtk_plot_pixbuf(x, y, width, height, pixbuf, bg);
}
bool nsgtk_plot_bitmap_tile(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
bool repeat_x, bool repeat_y, struct content *content)
{
int doneheight = 0, donewidth = 0;
GdkPixbuf *primary;
GdkPixbuf *pretiled;
if (!(repeat_x || repeat_y)) {
/* Not repeating at all, so just pass it on */
return nsgtk_plot_bitmap(x,y,width,height,bitmap,bg,content);
}
if (repeat_x && !repeat_y)
pretiled = gtk_bitmap_get_pretile_x(bitmap);
if (repeat_x && repeat_y)
pretiled = gtk_bitmap_get_pretile_xy(bitmap);
if (!repeat_x && repeat_y)
pretiled = gtk_bitmap_get_pretile_y(bitmap);
primary = gtk_bitmap_get_primary(bitmap);
/* use the primary and pretiled widths to scale the w/h provided */
width *= gdk_pixbuf_get_width(pretiled);
width /= gdk_pixbuf_get_width(primary);
height *= gdk_pixbuf_get_height(pretiled);
height /= gdk_pixbuf_get_height(primary);
if (y > cliprect.y)
doneheight = (cliprect.y - height) + ((y - cliprect.y) % height);
else
doneheight = y;
while (doneheight < (cliprect.y + cliprect.height)) {
if (x > cliprect.x)
donewidth = (cliprect.x - width) + ((x - cliprect.x) % width);
else
donewidth = x;
while (donewidth < (cliprect.x + cliprect.width)) {
nsgtk_plot_pixbuf(donewidth, doneheight,
width, height, pretiled, bg);
donewidth += width;
if (!repeat_x) break;
}
doneheight += height;
if (!repeat_y) break;
}
return true;
}
bool nsgtk_plot_path(float *p, unsigned int n, colour fill, float width,
colour c, float *transform)
{
unsigned int i;
cairo_matrix_t old_ctm, n_ctm;
if (n == 0)
return true;
if (p[0] != PLOTTER_PATH_MOVE) {
LOG(("Path does not start with move"));
return false;
}
/* Save CTM */
cairo_get_matrix(current_cr, &old_ctm);
/* Set up line style and width */
cairo_set_line_width(current_cr, 1);
nsgtk_set_solid();
/* Load new CTM */
n_ctm.xx = transform[0];
n_ctm.yx = transform[1];
n_ctm.xy = transform[2];
n_ctm.yy = transform[3];
n_ctm.x0 = transform[4];
n_ctm.y0 = transform[5];
cairo_set_matrix(current_cr, &n_ctm);
/* Construct path */
for (i = 0; i < n; ) {
if (p[i] == PLOTTER_PATH_MOVE) {
cairo_move_to(current_cr, p[i+1], p[i+2]);
i += 3;
} else if (p[i] == PLOTTER_PATH_CLOSE) {
cairo_close_path(current_cr);
i++;
} else if (p[i] == PLOTTER_PATH_LINE) {
cairo_line_to(current_cr, p[i+1], p[i+2]);
i += 3;
} else if (p[i] == PLOTTER_PATH_BEZIER) {
cairo_curve_to(current_cr, p[i+1], p[i+2],
p[i+3], p[i+4],
p[i+5], p[i+6]);
i += 7;
} else {
LOG(("bad path command %f", p[i]));
/* Reset matrix for safety */
cairo_set_matrix(current_cr, &old_ctm);
return false;
}
}
/* Restore original CTM */
cairo_set_matrix(current_cr, &old_ctm);
/* Now draw path */
if (fill != TRANSPARENT) {
nsgtk_set_colour(fill);
if (c != TRANSPARENT) {
/* Fill & Stroke */
cairo_fill_preserve(current_cr);
nsgtk_set_colour(c);
cairo_stroke(current_cr);
} else {
/* Fill only */
cairo_fill(current_cr);
}
} else if (c != TRANSPARENT) {
/* Stroke only */
nsgtk_set_colour(c);
cairo_stroke(current_cr);
}
return true;
}
void nsgtk_set_colour(colour c)
{
int r, g, b;
GdkColor colour;
r = c & 0xff;
g = (c & 0xff00) >> 8;
b = (c & 0xff0000) >> 16;
colour.red = r | (r << 8);
colour.green = g | (g << 8);
colour.blue = b | (b << 8);
colour.pixel = (r << 16) | (g << 8) | b;
gdk_color_alloc(gdk_colormap_get_system(),
&colour);
gdk_gc_set_foreground(current_gc, &colour);
cairo_set_source_rgba(current_cr, r / 255.0,
g / 255.0, b / 255.0, 1.0);
}
void nsgtk_set_solid()
{
double dashes = 0;
cairo_set_dash(current_cr, &dashes, 0, 0);
}
void nsgtk_set_dotted()
{
double cdashes = 1;
gint8 dashes[] = { 1, 1 };
cairo_set_dash(current_cr, &cdashes, 1, 0);
}
void nsgtk_set_dashed()
{
double cdashes = 3;
gint8 dashes[] = { 3, 3 };
cairo_set_dash(current_cr, &cdashes, 1, 0);
}
void nsgtk_plot_set_scale(float s)
{
nsgtk_plot_scale = s;
}
float nsgtk_plot_get_scale(void)
{
return nsgtk_plot_scale;
}
/** Plot a caret. It is assumed that the plotters have been set up. */
void nsgtk_plot_caret(int x, int y, int h)
{
GdkColor colour;
colour.red = 0;
colour.green = 0;
colour.blue = 0;
colour.pixel = 0;
gdk_color_alloc(gdk_colormap_get_system(),
&colour);
gdk_gc_set_foreground(current_gc, &colour);
gdk_draw_line(current_drawable, current_gc,
x, y,
x, y + h - 1);
}