mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-05 20:31:54 +03:00
612 lines
16 KiB
C
612 lines
16 KiB
C
/*
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* Copyright 2006 Rob Kendrick <rjek@rjek.com>
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* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
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* Copyright 2008 Adam Blokus <adamblokus@gmail.com>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* GTK printing (implementation).
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* All the functions and structures necessary for printing( signal handlers,
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* plotters, printer) are here.
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* Most of the plotters have been copied from the gtk_plotters.c file.
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*/
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#include "utils/config.h"
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#include <math.h>
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#include <assert.h>
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#include <gdk/gdk.h>
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#include <gtk/gtk.h>
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#include "utils/log.h"
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#include "utils/utils.h"
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#include "utils/nsoption.h"
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#include "netsurf/plotters.h"
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#include "desktop/print.h"
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#include "desktop/printer.h"
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#include "gtk/layout_pango.h"
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#include "gtk/bitmap.h"
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#include "gtk/print.h"
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#include "gtk/scaffolding.h"
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/* Globals */
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cairo_t *gtk_print_current_cr;
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static struct print_settings* settings;
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struct hlcache_handle *content_to_print;
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static GdkRectangle cliprect;
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static inline void nsgtk_print_set_colour(colour c)
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{
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int r, g, b;
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r = c & 0xff;
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g = (c & 0xff00) >> 8;
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b = (c & 0xff0000) >> 16;
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#ifdef FIXME
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GdkColor colour;
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colour.red = r | (r << 8);
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colour.green = g | (g << 8);
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colour.blue = b | (b << 8);
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colour.pixel = (r << 16) | (g << 8) | b;
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gdk_colormap_alloc_color(gdk_colormap_get_system(), &colour, true, true);
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#endif
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cairo_set_source_rgba(gtk_print_current_cr, r / 255.0,
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g / 255.0, b / 255.0, 1.0);
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}
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static bool gtk_print_font_paint(int x, int y,
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const char *string, size_t length,
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const plot_font_style_t *fstyle)
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{
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PangoFontDescription *desc;
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PangoLayout *layout;
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gint size;
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PangoLayoutLine *line;
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if (length == 0)
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return true;
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desc = nsfont_style_to_description(fstyle);
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size = (gint) ((double) pango_font_description_get_size(desc) *
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settings->scale);
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if (pango_font_description_get_size_is_absolute(desc))
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pango_font_description_set_absolute_size(desc, size);
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else
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pango_font_description_set_size(desc, size);
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layout = pango_cairo_create_layout(gtk_print_current_cr);
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pango_layout_set_font_description(layout, desc);
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pango_layout_set_text(layout, string, length);
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line = pango_layout_get_line(layout, 0);
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cairo_move_to(gtk_print_current_cr, x, y);
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nsgtk_print_set_colour(fstyle->foreground);
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pango_cairo_show_layout_line(gtk_print_current_cr, line);
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g_object_unref(layout);
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pango_font_description_free(desc);
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return true;
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}
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/** Set cairo context to solid plot operation. */
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static inline void nsgtk_print_set_solid(void)
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{
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double dashes = 0;
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cairo_set_dash(gtk_print_current_cr, &dashes, 0, 0);
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}
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/** Set cairo context to dotted plot operation. */
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static inline void nsgtk_print_set_dotted(void)
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{
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double cdashes[] = { 1.0, 2.0 };
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cairo_set_dash(gtk_print_current_cr, cdashes, 1, 0);
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}
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/** Set cairo context to dashed plot operation. */
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static inline void nsgtk_print_set_dashed(void)
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{
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double cdashes[] = { 8.0, 2.0 };
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cairo_set_dash(gtk_print_current_cr, cdashes, 1, 0);
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}
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/** Set clipping area for subsequent plot operations. */
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static bool nsgtk_print_plot_clip(const struct rect *clip)
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{
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LOG("Clipping. x0: %i ;\t y0: %i ;\t x1: %i ;\t y1: %i", clip->x0, clip->y0, clip->x1, clip->y1);
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/* Normalize cllipping area - to prevent overflows.
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* See comment in pdf_plot_fill. */
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int clip_x0 = min(max(clip->x0, 0), settings->page_width);
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int clip_y0 = min(max(clip->y0, 0), settings->page_height);
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int clip_x1 = min(max(clip->x1, 0), settings->page_width);
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int clip_y1 = min(max(clip->y1, 0), settings->page_height);
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cairo_reset_clip(gtk_print_current_cr);
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cairo_rectangle(gtk_print_current_cr, clip_x0, clip_y0,
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clip_x1 - clip_x0, clip_y1 - clip_y0);
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cairo_clip(gtk_print_current_cr);
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cliprect.x = clip_x0;
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cliprect.y = clip_y0;
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cliprect.width = clip_x1 - clip_x0;
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cliprect.height = clip_y1 - clip_y0;
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return true;
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}
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static bool nsgtk_print_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
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{
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nsgtk_print_set_colour(style->fill_colour);
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nsgtk_print_set_solid();
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cairo_set_line_width(gtk_print_current_cr, 1);
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cairo_arc(gtk_print_current_cr, x, y, radius,
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(angle1 + 90) * (M_PI / 180),
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(angle2 + 90) * (M_PI / 180));
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cairo_stroke(gtk_print_current_cr);
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return true;
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}
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static bool nsgtk_print_plot_disc(int x, int y, int radius, const plot_style_t *style)
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{
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if (style->fill_type != PLOT_OP_TYPE_NONE) {
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nsgtk_print_set_colour(style->fill_colour);
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nsgtk_print_set_solid();
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cairo_set_line_width(gtk_print_current_cr, 0);
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cairo_arc(gtk_print_current_cr, x, y, radius, 0, M_PI * 2);
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cairo_fill(gtk_print_current_cr);
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cairo_stroke(gtk_print_current_cr);
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}
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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nsgtk_print_set_colour(style->stroke_colour);
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switch (style->stroke_type) {
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case PLOT_OP_TYPE_SOLID: /**< Solid colour */
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default:
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nsgtk_print_set_solid();
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break;
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case PLOT_OP_TYPE_DOT: /**< Doted plot */
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nsgtk_print_set_dotted();
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break;
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case PLOT_OP_TYPE_DASH: /**< dashed plot */
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nsgtk_print_set_dashed();
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break;
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}
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if (style->stroke_width == 0)
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cairo_set_line_width(gtk_print_current_cr, 1);
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else
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cairo_set_line_width(gtk_print_current_cr, style->stroke_width);
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cairo_arc(gtk_print_current_cr, x, y, radius, 0, M_PI * 2);
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cairo_stroke(gtk_print_current_cr);
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}
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return true;
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}
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static bool nsgtk_print_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
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{
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nsgtk_print_set_colour(style->stroke_colour);
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switch (style->stroke_type) {
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case PLOT_OP_TYPE_SOLID: /**< Solid colour */
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default:
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nsgtk_print_set_solid();
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break;
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case PLOT_OP_TYPE_DOT: /**< Doted plot */
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nsgtk_print_set_dotted();
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break;
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case PLOT_OP_TYPE_DASH: /**< dashed plot */
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nsgtk_print_set_dashed();
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break;
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}
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if (style->stroke_width == 0)
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cairo_set_line_width(gtk_print_current_cr, 1);
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else
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cairo_set_line_width(gtk_print_current_cr, style->stroke_width);
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cairo_move_to(gtk_print_current_cr, x0 + 0.5, y0 + 0.5);
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cairo_line_to(gtk_print_current_cr, x1 + 0.5, y1 + 0.5);
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cairo_stroke(gtk_print_current_cr);
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return true;
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}
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static bool nsgtk_print_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
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{
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LOG("x0: %i ;\t y0: %i ;\t x1: %i ;\t y1: %i", x0, y0, x1, y1);
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if (style->fill_type != PLOT_OP_TYPE_NONE) {
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nsgtk_print_set_colour(style->fill_colour);
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nsgtk_print_set_solid();
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/* Normalize boundaries of the area - to prevent overflows.
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* See comment in pdf_plot_fill. */
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x0 = min(max(x0, 0), settings->page_width);
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y0 = min(max(y0, 0), settings->page_height);
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x1 = min(max(x1, 0), settings->page_width);
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y1 = min(max(y1, 0), settings->page_height);
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cairo_set_line_width(gtk_print_current_cr, 0);
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cairo_rectangle(gtk_print_current_cr, x0, y0, x1 - x0, y1 - y0);
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cairo_fill(gtk_print_current_cr);
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cairo_stroke(gtk_print_current_cr);
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}
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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nsgtk_print_set_colour(style->stroke_colour);
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switch (style->stroke_type) {
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case PLOT_OP_TYPE_SOLID: /**< Solid colour */
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default:
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nsgtk_print_set_solid();
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break;
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case PLOT_OP_TYPE_DOT: /**< Doted plot */
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nsgtk_print_set_dotted();
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break;
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case PLOT_OP_TYPE_DASH: /**< dashed plot */
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nsgtk_print_set_dashed();
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break;
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}
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if (style->stroke_width == 0)
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cairo_set_line_width(gtk_print_current_cr, 1);
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else
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cairo_set_line_width(gtk_print_current_cr, style->stroke_width);
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cairo_rectangle(gtk_print_current_cr, x0, y0, x1 - x0, y1 - y0);
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cairo_stroke(gtk_print_current_cr);
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}
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return true;
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}
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static bool nsgtk_print_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
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{
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unsigned int i;
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LOG("Plotting polygon.");
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nsgtk_print_set_colour(style->fill_colour);
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nsgtk_print_set_solid();
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cairo_set_line_width(gtk_print_current_cr, 0);
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cairo_move_to(gtk_print_current_cr, p[0], p[1]);
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LOG("Starting line at: %i\t%i", p[0], p[1]);
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for (i = 1; i != n; i++) {
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cairo_line_to(gtk_print_current_cr, p[i * 2], p[i * 2 + 1]);
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LOG("Drawing line to: %i\t%i", p[i * 2], p[i * 2 + 1]);
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}
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cairo_fill(gtk_print_current_cr);
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cairo_stroke(gtk_print_current_cr);
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return true;
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}
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static bool nsgtk_print_plot_path(const float *p, unsigned int n, colour fill,
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float width, colour c, const float transform[6])
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{
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/* Only the internal SVG renderer uses this plot call currently,
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* and the GTK version uses librsvg. Thus, we ignore this complexity,
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* and just return true obliviously. */
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return true;
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}
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static bool nsgtk_print_plot_pixbuf(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg)
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{
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int x0, y0, x1, y1;
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int dsrcx, dsrcy, dwidth, dheight;
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int bmwidth, bmheight;
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cairo_surface_t *bmsurface = bitmap->surface;
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/* Bail early if we can */
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if (width == 0 || height == 0)
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/* Nothing to plot */
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return true;
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if ((x > (cliprect.x + cliprect.width)) ||
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((x + width) < cliprect.x) ||
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(y > (cliprect.y + cliprect.height)) ||
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((y + height) < cliprect.y)) {
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/* Image completely outside clip region */
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return true;
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}
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/* Get clip rectangle / image rectangle edge differences */
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x0 = cliprect.x - x;
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y0 = cliprect.y - y;
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x1 = (x + width) - (cliprect.x + cliprect.width);
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y1 = (y + height) - (cliprect.y + cliprect.height);
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/* Set initial draw geometry */
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dsrcx = x;
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dsrcy = y;
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dwidth = width;
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dheight = height;
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/* Manually clip draw coordinates to area of image to be rendered */
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if (x0 > 0) {
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/* Clip left */
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dsrcx += x0;
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dwidth -= x0;
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}
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if (y0 > 0) {
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/* Clip top */
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dsrcy += y0;
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dheight -= y0;
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}
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if (x1 > 0) {
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/* Clip right */
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dwidth -= x1;
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}
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if (y1 > 0) {
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/* Clip bottom */
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dheight -= y1;
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}
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if (dwidth == 0 || dheight == 0)
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/* Nothing to plot */
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return true;
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bmwidth = cairo_image_surface_get_width(bmsurface);
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bmheight = cairo_image_surface_get_height(bmsurface);
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/* Render the bitmap */
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if ((bmwidth == width) && (bmheight == height)) {
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/* Bitmap is not scaled */
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/* Plot the bitmap */
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cairo_set_source_surface(gtk_print_current_cr, bmsurface, x, y);
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cairo_rectangle(gtk_print_current_cr, dsrcx, dsrcy, dwidth, dheight);
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cairo_fill(gtk_print_current_cr);
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} else {
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/* Bitmap is scaled */
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if ((bitmap->scsurface != NULL) &&
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((cairo_image_surface_get_width(bitmap->scsurface) != width) ||
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(cairo_image_surface_get_height(bitmap->scsurface) != height))){
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cairo_surface_destroy(bitmap->scsurface);
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bitmap->scsurface = NULL;
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}
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if (bitmap->scsurface == NULL) {
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bitmap->scsurface = cairo_surface_create_similar(bmsurface,CAIRO_CONTENT_COLOR_ALPHA, width, height);
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cairo_t *cr = cairo_create(bitmap->scsurface);
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/* Scale *before* setting the source surface (1) */
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cairo_scale(cr, (double)width / bmwidth, (double)height / bmheight);
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cairo_set_source_surface(cr, bmsurface, 0, 0);
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/* To avoid getting the edge pixels blended with 0
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* alpha, which would occur with the default
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* EXTEND_NONE. Use EXTEND_PAD for 1.2 or newer (2)
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*/
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cairo_pattern_set_extend(cairo_get_source(cr),
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CAIRO_EXTEND_REFLECT);
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/* Replace the destination with the source instead of
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* overlaying
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*/
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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/* Do the actual drawing */
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cairo_paint(cr);
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cairo_destroy(cr);
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}
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/* Plot the scaled bitmap */
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cairo_set_source_surface(gtk_print_current_cr, bitmap->scsurface, x, y);
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cairo_rectangle(gtk_print_current_cr, dsrcx, dsrcy, dwidth, dheight);
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cairo_fill(gtk_print_current_cr);
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}
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return true;
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}
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static bool nsgtk_print_plot_bitmap(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg,
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bitmap_flags_t flags)
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{
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int doneheight = 0, donewidth = 0;
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bool repeat_x = (flags & BITMAPF_REPEAT_X);
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bool repeat_y = (flags & BITMAPF_REPEAT_Y);
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if (!(repeat_x || repeat_y)) {
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/* Not repeating at all, so just pass it on */
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return nsgtk_print_plot_pixbuf(x, y, width, height, bitmap, bg);
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}
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width = nsgtk_bitmap_get_width(bitmap);
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height = nsgtk_bitmap_get_height(bitmap);
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/* Bail early if we can */
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if (width == 0 || height == 0)
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/* Nothing to plot */
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return true;
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if (y > cliprect.y) {
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doneheight = (cliprect.y - height) + ((y - cliprect.y) % height);
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} else {
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doneheight = y;
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}
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while (doneheight < (cliprect.y + cliprect.height)) {
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if (x > cliprect.x) {
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donewidth = (cliprect.x - width) + ((x - cliprect.x) % width);
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} else {
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donewidth = x;
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}
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while (donewidth < (cliprect.x + cliprect.width)) {
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nsgtk_print_plot_pixbuf(donewidth, doneheight,
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width, height, bitmap, bg);
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donewidth += width;
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if (!repeat_x)
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break;
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}
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doneheight += height;
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if (!repeat_y)
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break;
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}
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|
return true;
|
|
}
|
|
|
|
static bool nsgtk_print_plot_text(int x, int y, const char *text, size_t length,
|
|
const plot_font_style_t *fstyle)
|
|
{
|
|
return gtk_print_font_paint(x, y, text, length, fstyle);
|
|
}
|
|
|
|
/** GTK print plotter table */
|
|
static const struct plotter_table nsgtk_print_plotters = {
|
|
.clip = nsgtk_print_plot_clip,
|
|
.arc = nsgtk_print_plot_arc,
|
|
.disc = nsgtk_print_plot_disc,
|
|
.line = nsgtk_print_plot_line,
|
|
.rectangle = nsgtk_print_plot_rectangle,
|
|
.polygon = nsgtk_print_plot_polygon,
|
|
.path = nsgtk_print_plot_path,
|
|
.bitmap = nsgtk_print_plot_bitmap,
|
|
.text = nsgtk_print_plot_text,
|
|
.option_knockout = false,
|
|
};
|
|
|
|
static bool gtk_print_begin(struct print_settings* settings)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static bool gtk_print_next_page(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void gtk_print_end(void)
|
|
{
|
|
}
|
|
|
|
static const struct printer gtk_printer = {
|
|
&nsgtk_print_plotters,
|
|
gtk_print_begin,
|
|
gtk_print_next_page,
|
|
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 = user_data;
|
|
|
|
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; /* at 0.7 the pages look the best */
|
|
settings->font_func = nsgtk_layout_table;
|
|
|
|
if (print_set_up(content_to_print, >k_printer,
|
|
settings, &height_to_print) == false) {
|
|
gtk_print_operation_cancel(operation);
|
|
|
|
} else {
|
|
|
|
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 -
|
|
FIXTOFLT(FSUB(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(>k_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, >k_printer, user_data);
|
|
}
|
|
|
|
|