netsurf/gtk/gtk_print.c
Rob Kendrick 789ab037d1 Add simple, experimental Makefile.config support.
* GTK-specific features, such as RSVG and librosprite, can be set to one of
   three options; YES, NO or AUTO.  AUTO will attempt to auto-detect its
   availability and enable it if it is available.
 * Haru PDF export/printing is enabled via this also.  It lacks a pkg-config
   file and works on RISC OS too, and thus has no auto-detection.  Disabling
   it disables the PDF-related menu entries in nsgtk.

svn path=/trunk/netsurf/; revision=4747
2008-07-26 17:08:23 +00:00

578 lines
15 KiB
C

/*
* Copyright 2006 Rob Kendrick <rjek@rjek.com>
* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
* 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
* GTK printing (implementation).
* All the functions and structures necessary for printing( signal handlers,
* plotters, printer) are here.
* Most of the plotters have been copied from the gtk_plotters.c file.
*/
#include "utils/config.h"
#ifdef WITH_PDF_EXPORT
#include <math.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include "desktop/plotters.h"
#include "gtk/font_pango.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"
#include "desktop/print.h"
#include "desktop/printer.h"
#include "content/content.h"
#include "gtk_print.h"
#include "utils/utils.h"
cairo_t *gtk_print_current_cr;
static struct print_settings* settings;
struct content *content_to_print;
static bool nsgtk_print_plot_clg(colour c);
static bool nsgtk_print_plot_rectangle(int x0, int y0, int width, int height,
int line_width, colour c, bool dotted, bool dashed);
static bool nsgtk_print_plot_line(int x0, int y0, int x1, int y1, int width,
colour c, bool dotted, bool dashed);
static bool nsgtk_print_plot_polygon(int *p, unsigned int n, colour fill);
static bool nsgtk_print_plot_path(float *p, unsigned int n, colour fill, float width,
colour c, float *transform);
static bool nsgtk_print_plot_fill(int x0, int y0, int x1, int y1, colour c);
static bool nsgtk_print_plot_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1);
static bool nsgtk_print_plot_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c);
static bool nsgtk_print_plot_disc(int x, int y, int radius, colour c, bool filled);
static bool nsgtk_print_plot_arc(int x, int y, int radius, int angle1, int angle2,
colour c);
static bool nsgtk_print_plot_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg, struct content *content);
static bool nsgtk_print_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_print_set_solid(void); /**< Set for drawing solid lines */
static void nsgtk_print_set_dotted(void); /**< Set for drawing dotted lines */
static void nsgtk_print_set_dashed(void); /**< Set for drawing dashed lines */
static void nsgtk_print_set_colour(colour c);
static void nsgtk_print_plot_caret(int x, int y, int h);
static bool gtk_print_font_paint(const struct css_style *style,
const char *string, size_t length,
int x, int y, colour c);
static bool gtk_print_begin(struct print_settings* settings);
static bool gtk_print_next_page(void);
static void gtk_print_end(void);
static GdkRectangle cliprect;
struct plotter_table plot;
static const struct plotter_table nsgtk_print_plotters = {
nsgtk_print_plot_clg,
nsgtk_print_plot_rectangle,
nsgtk_print_plot_line,
nsgtk_print_plot_polygon,
nsgtk_print_plot_fill,
nsgtk_print_plot_clip,
nsgtk_print_plot_text,
nsgtk_print_plot_disc,
nsgtk_print_plot_arc,
nsgtk_print_plot_bitmap,
nsgtk_print_plot_bitmap_tile,
NULL,
NULL,
NULL,
nsgtk_print_plot_path
};
static const struct printer gtk_printer= {
&nsgtk_print_plotters,
gtk_print_begin,
gtk_print_next_page,
gtk_print_end
};
bool nsgtk_print_plot_clg(colour c)
{
return true;
}
bool nsgtk_print_plot_rectangle(int x0, int y0, int width, int height,
int line_width, colour c, bool dotted, bool dashed)
{
LOG(("Plotting rectangle. width: %i ; height: %i", width, height));
nsgtk_print_set_colour(c);
if (dotted)
nsgtk_print_set_dotted();
else if (dashed)
nsgtk_print_set_dashed();
else
nsgtk_print_set_solid();
if (line_width == 0)
line_width = 1;
cairo_set_line_width(gtk_print_current_cr, line_width);
cairo_rectangle(gtk_print_current_cr, x0, y0, width, height);
cairo_stroke(gtk_print_current_cr);
return true;
}
bool nsgtk_print_plot_line(int x0, int y0, int x1, int y1, int width,
colour c, bool dotted, bool dashed)
{
nsgtk_print_set_colour(c);
if (dotted)
nsgtk_print_set_dotted();
else if (dashed)
nsgtk_print_set_dashed();
else
nsgtk_print_set_solid();
if (width == 0)
width = 1;
cairo_set_line_width(gtk_print_current_cr, width);
cairo_move_to(gtk_print_current_cr, x0, y0 - 0.5);
cairo_line_to(gtk_print_current_cr, x1, y1 - 0.5);
cairo_stroke(gtk_print_current_cr);
return true;
}
bool nsgtk_print_plot_polygon(int *p, unsigned int n, colour fill)
{
LOG(("Plotting polygon."));
unsigned int i;
nsgtk_print_set_colour(fill);
nsgtk_print_set_solid();
cairo_set_line_width(gtk_print_current_cr, 0);
cairo_move_to(gtk_print_current_cr, p[0], p[1]);
LOG(("Starting line at: %i\t%i",p[0],p[1]));
for (i = 1; i != n; i++) {
cairo_line_to(gtk_print_current_cr, p[i * 2], p[i * 2 + 1]);
LOG(("Drawing line to: %i\t%i",p[i * 2], p[i * 2 + 1]));
}
cairo_fill(gtk_print_current_cr);
cairo_stroke(gtk_print_current_cr);
return true;
}
bool nsgtk_print_plot_fill(int x0, int y0, int x1, int y1, colour c)
{
LOG(("Plotting fill. x0: %i ;\t y0: %i ;\t x1: %i ;\t y1: %i", x0,y0,x1,y1));
nsgtk_print_set_colour(c);
nsgtk_print_set_solid();
/*Normalize boundaries of the area - to prevent overflows.
See comment in pdf_plot_fill.
*/
x0 = min(max(x0, 0), settings->page_width);
y0 = min(max(y0, 0), settings->page_height);
x1 = min(max(x1, 0), settings->page_width);
y1 = min(max(y1, 0), settings->page_height);
cairo_set_line_width(gtk_print_current_cr, 0);
cairo_rectangle(gtk_print_current_cr, x0, y0, x1 - x0, y1 - y0);
cairo_fill(gtk_print_current_cr);
cairo_stroke(gtk_print_current_cr);
return true;
}
bool nsgtk_print_plot_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1)
{
LOG(("Clipping. x0: %i ;\t y0: %i ;\t x1: %i ;\t y1: %i",
clip_x0,clip_y0,clip_x1,clip_y1));
/*Normalize cllipping area - to prevent overflows.
See comment in pdf_plot_fill.
*/
clip_x0 = min(max(clip_x0, 0), settings->page_width);
clip_y0 = min(max(clip_y0, 0), settings->page_height);
clip_x1 = min(max(clip_x1, 0), settings->page_width);
clip_y1 = min(max(clip_y1, 0), settings->page_height);
cairo_reset_clip(gtk_print_current_cr);
cairo_rectangle(gtk_print_current_cr, clip_x0, clip_y0,
clip_x1 - clip_x0, clip_y1 - clip_y0);
cairo_clip(gtk_print_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(gtk_print_current_gc, &cliprect);
return true;
}
bool nsgtk_print_plot_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c)
{
return gtk_print_font_paint(style, text, length, x, y, c);
}
bool nsgtk_print_plot_disc(int x, int y, int radius, colour c, bool filled)
{
nsgtk_print_set_colour(c);
nsgtk_print_set_solid();
if (filled)
cairo_set_line_width(gtk_print_current_cr, 0);
else
cairo_set_line_width(gtk_print_current_cr, 1);
cairo_arc(gtk_print_current_cr, x, y, radius, 0, M_PI * 2);
if (filled)
cairo_fill(gtk_print_current_cr);
cairo_stroke(gtk_print_current_cr);
return true;
}
bool nsgtk_print_plot_arc(int x, int y, int radius, int angle1, int angle2, colour c)
{
nsgtk_print_set_colour(c);
nsgtk_print_set_solid();
cairo_set_line_width(gtk_print_current_cr, 1);
cairo_arc(gtk_print_current_cr, x, y, radius,
(angle1 + 90) * (M_PI / 180),
(angle2 + 90) * (M_PI / 180));
cairo_stroke(gtk_print_current_cr);
return true;
}
static bool nsgtk_print_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_cairo_set_source_pixbuf(gtk_print_current_cr, pixbuf, x, y);
cairo_paint(gtk_print_current_cr);
} else {
GdkPixbuf *scaled;
scaled = gdk_pixbuf_scale_simple(pixbuf,
width, height,
/* plotting for the printer doesn't have to be fast
* so we can use always the interp_style
* that gives better quality
*/
GDK_INTERP_BILINEAR
);
if (!scaled)
return false;
gdk_cairo_set_source_pixbuf(gtk_print_current_cr, scaled, x, y);
cairo_paint(gtk_print_current_cr);
g_object_unref(scaled);
}
return true;
}
bool nsgtk_print_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_print_plot_pixbuf(x, y, width, height, pixbuf, bg);
}
bool nsgtk_print_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_print_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_print_plot_pixbuf(donewidth, doneheight,
width, height, pretiled, bg);
donewidth += width;
if (!repeat_x) break;
}
doneheight += height;
if (!repeat_y) break;
}
return true;
}
bool nsgtk_print_plot_path(float *p, unsigned int n, colour fill, float width,
colour c, float *transform)
{
/* Only the internal SVG renderer uses this plot call currently,
* and the GTK version uses librsvg. Thus, we ignore this complexity,
* and just return true obliviously.
*/
return true;
}
void nsgtk_print_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(gtk_print_current_gc, &colour);
cairo_set_source_rgba(gtk_print_current_cr, r / 255.0,
g / 255.0, b / 255.0, 1.0);
}
void nsgtk_print_set_solid()
{
double dashes = 0;
cairo_set_dash(gtk_print_current_cr, &dashes, 0, 0);
}
void nsgtk_print_set_dotted()
{
double cdashes = 1;
gint8 dashes[] = { 1, 1 };
cairo_set_dash(gtk_print_current_cr, &cdashes, 1, 0);
}
void nsgtk_print_set_dashed()
{
double cdashes = 3;
gint8 dashes[] = { 3, 3 };
cairo_set_dash(gtk_print_current_cr, &cdashes, 1, 0);
}
bool gtk_print_font_paint(const struct css_style *style,
const char *string, size_t length,
int x, int y, colour c)
{
PangoFontDescription *desc;
PangoLayout *layout;
gint size;
PangoLayoutLine *line;
int width, height;
if (length == 0)
return true;
desc = nsfont_style_to_description(style);
size = (gint)((double)pango_font_description_get_size(desc) * settings->scale);
if (pango_font_description_get_size_is_absolute(desc))
pango_font_description_set_absolute_size(desc, size);
else
pango_font_description_set_size(desc, size);
layout = pango_cairo_create_layout(gtk_print_current_cr);
pango_layout_set_font_description(layout, desc);
pango_layout_set_text(layout, string, length);
line = pango_layout_get_line(layout, 0);
cairo_move_to(gtk_print_current_cr, x, y);
nsgtk_print_set_colour(c);
pango_cairo_show_layout_line(gtk_print_current_cr, line);
g_object_unref(layout);
pango_font_description_free(desc);
return true;
}
static bool gtk_print_begin(struct print_settings* settings)
{
return true;
}
static bool gtk_print_next_page()
{
return true;
}
static void gtk_print_end()
{
}
/** Handle the begin_print signal from the GtkPrintOperation
* \param operation the operation which emited the signal
* \param context the print context used to set up the pages
* \param user_data nothing in here
*/
void gtk_print_signal_begin_print (GtkPrintOperation *operation,
GtkPrintContext *context,
gpointer user_data)
{
int page_number;
double height_on_page, height_to_print;
LOG(("Begin print"));
settings = print_make_settings(DEFAULT);
settings->margins[MARGINTEXT] = 0;
settings->margins[MARGINTOP] = 0;
settings->margins[MARGINLEFT] = 0;
settings->margins[MARGINBOTTOM] = 0;
settings->margins[MARGINRIGHT] = 0;
settings->page_width = gtk_print_context_get_width(context);
settings->page_height = gtk_print_context_get_height(context);
settings->scale = 0.7;
settings->font_func = &nsfont;
print_set_up(content_to_print, &gtk_printer, settings, &height_to_print);
LOG(("page_width: %f ;page_height: %f; content height: %lf",settings->page_width,
settings->page_height, height_to_print));
height_on_page = settings->page_height;
height_on_page = height_on_page - settings->margins[MARGINTOP]
- settings->margins[MARGINBOTTOM];
height_to_print *= settings->scale;
page_number = height_to_print / height_on_page;
if (height_to_print - page_number * height_on_page > 0)
page_number += 1;
gtk_print_operation_set_n_pages(operation, page_number);
}
/** Handle the draw_page signal from the GtkPrintOperation.
* This function changes only the cairo context to print on.
*/
void gtk_print_signal_draw_page(GtkPrintOperation *operation,
GtkPrintContext *context,
gint page_nr,
gpointer user_data)
{
LOG(("Draw Page"));
gtk_print_current_cr = gtk_print_context_get_cairo_context(context);
print_draw_next_page(&gtk_printer, settings);
}
/** Handle the end_print signal from the GtkPrintOperation.
* This functions calls only the print_cleanup function from the print interface
*/
void gtk_print_signal_end_print(GtkPrintOperation *operation,
GtkPrintContext *context,
gpointer user_data)
{
LOG(("End print"));
print_cleanup(content_to_print, &gtk_printer);
}
#endif /* WITH_PDF_EXPORT */