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-rw-r--r--frontends/gtk/print.c613
1 files changed, 613 insertions, 0 deletions
diff --git a/frontends/gtk/print.c b/frontends/gtk/print.c
new file mode 100644
index 000000000..a6e639996
--- /dev/null
+++ b/frontends/gtk/print.c
@@ -0,0 +1,613 @@
+/*
+ * 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"
+
+#include <math.h>
+#include <assert.h>
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
+#include "utils/log.h"
+#include "utils/utils.h"
+#include "content/content.h"
+#include "content/hlcache.h"
+#include "utils/nsoption.h"
+#include "desktop/plotters.h"
+#include "desktop/print.h"
+#include "desktop/printer.h"
+
+#include "gtk/layout_pango.h"
+#include "gtk/bitmap.h"
+#include "gtk/print.h"
+#include "gtk/scaffolding.h"
+
+/* Globals */
+cairo_t *gtk_print_current_cr;
+static struct print_settings* settings;
+hlcache_handle *content_to_print;
+static GdkRectangle cliprect;
+
+static inline void nsgtk_print_set_colour(colour c)
+{
+ int r, g, b;
+
+ r = c & 0xff;
+ g = (c & 0xff00) >> 8;
+ b = (c & 0xff0000) >> 16;
+
+#ifdef FIXME
+ GdkColor colour;
+ colour.red = r | (r << 8);
+ colour.green = g | (g << 8);
+ colour.blue = b | (b << 8);
+ colour.pixel = (r << 16) | (g << 8) | b;
+ gdk_colormap_alloc_color(gdk_colormap_get_system(), &colour, true, true);
+#endif
+ cairo_set_source_rgba(gtk_print_current_cr, r / 255.0,
+ g / 255.0, b / 255.0, 1.0);
+}
+
+
+
+static bool gtk_print_font_paint(int x, int y,
+ const char *string, size_t length,
+ const plot_font_style_t *fstyle)
+{
+ PangoFontDescription *desc;
+ PangoLayout *layout;
+ gint size;
+ PangoLayoutLine *line;
+
+ if (length == 0)
+ return true;
+
+ desc = nsfont_style_to_description(fstyle);
+ 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(fstyle->foreground);
+ pango_cairo_show_layout_line(gtk_print_current_cr, line);
+
+ g_object_unref(layout);
+ pango_font_description_free(desc);
+
+ return true;
+}
+
+
+/** Set cairo context to solid plot operation. */
+static inline void nsgtk_print_set_solid(void)
+{
+ double dashes = 0;
+ cairo_set_dash(gtk_print_current_cr, &dashes, 0, 0);
+}
+
+/** Set cairo context to dotted plot operation. */
+static inline void nsgtk_print_set_dotted(void)
+{
+ double cdashes[] = { 1.0, 2.0 };
+ cairo_set_dash(gtk_print_current_cr, cdashes, 1, 0);
+}
+
+/** Set cairo context to dashed plot operation. */
+static inline void nsgtk_print_set_dashed(void)
+{
+ double cdashes[] = { 8.0, 2.0 };
+ cairo_set_dash(gtk_print_current_cr, cdashes, 1, 0);
+}
+
+/** Set clipping area for subsequent plot operations. */
+static bool nsgtk_print_plot_clip(const struct rect *clip)
+{
+ 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. */
+ int clip_x0 = min(max(clip->x0, 0), settings->page_width);
+ int clip_y0 = min(max(clip->y0, 0), settings->page_height);
+ int clip_x1 = min(max(clip->x1, 0), settings->page_width);
+ int 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;
+
+ return true;
+}
+
+static bool nsgtk_print_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
+{
+ nsgtk_print_set_colour(style->fill_colour);
+ 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_disc(int x, int y, int radius, const plot_style_t *style)
+{
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+ nsgtk_print_set_colour(style->fill_colour);
+ nsgtk_print_set_solid();
+ cairo_set_line_width(gtk_print_current_cr, 0);
+ cairo_arc(gtk_print_current_cr, x, y, radius, 0, M_PI * 2);
+ cairo_fill(gtk_print_current_cr);
+ cairo_stroke(gtk_print_current_cr);
+ }
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ nsgtk_print_set_colour(style->stroke_colour);
+
+ switch (style->stroke_type) {
+ case PLOT_OP_TYPE_SOLID: /**< Solid colour */
+ default:
+ nsgtk_print_set_solid();
+ break;
+
+ case PLOT_OP_TYPE_DOT: /**< Doted plot */
+ nsgtk_print_set_dotted();
+ break;
+
+ case PLOT_OP_TYPE_DASH: /**< dashed plot */
+ nsgtk_print_set_dashed();
+ break;
+ }
+
+ if (style->stroke_width == 0)
+ cairo_set_line_width(gtk_print_current_cr, 1);
+ else
+ cairo_set_line_width(gtk_print_current_cr, style->stroke_width);
+
+ cairo_arc(gtk_print_current_cr, x, y, radius, 0, M_PI * 2);
+
+ cairo_stroke(gtk_print_current_cr);
+ }
+ return true;
+}
+
+static bool nsgtk_print_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
+{
+ nsgtk_print_set_colour(style->stroke_colour);
+
+ switch (style->stroke_type) {
+ case PLOT_OP_TYPE_SOLID: /**< Solid colour */
+ default:
+ nsgtk_print_set_solid();
+ break;
+
+ case PLOT_OP_TYPE_DOT: /**< Doted plot */
+ nsgtk_print_set_dotted();
+ break;
+
+ case PLOT_OP_TYPE_DASH: /**< dashed plot */
+ nsgtk_print_set_dashed();
+ break;
+ }
+
+ if (style->stroke_width == 0)
+ cairo_set_line_width(gtk_print_current_cr, 1);
+ else
+ cairo_set_line_width(gtk_print_current_cr, style->stroke_width);
+
+ cairo_move_to(gtk_print_current_cr, x0 + 0.5, y0 + 0.5);
+ cairo_line_to(gtk_print_current_cr, x1 + 0.5, y1 + 0.5);
+ cairo_stroke(gtk_print_current_cr);
+
+ return true;
+}
+
+static bool nsgtk_print_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
+{
+ LOG("x0: %i ;\t y0: %i ;\t x1: %i ;\t y1: %i", x0, y0, x1, y1);
+
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+
+ nsgtk_print_set_colour(style->fill_colour);
+ 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);
+ }
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ nsgtk_print_set_colour(style->stroke_colour);
+
+ switch (style->stroke_type) {
+ case PLOT_OP_TYPE_SOLID: /**< Solid colour */
+ default:
+ nsgtk_print_set_solid();
+ break;
+
+ case PLOT_OP_TYPE_DOT: /**< Doted plot */
+ nsgtk_print_set_dotted();
+ break;
+
+ case PLOT_OP_TYPE_DASH: /**< dashed plot */
+ nsgtk_print_set_dashed();
+ break;
+ }
+
+ if (style->stroke_width == 0)
+ cairo_set_line_width(gtk_print_current_cr, 1);
+ else
+ cairo_set_line_width(gtk_print_current_cr, style->stroke_width);
+
+ cairo_rectangle(gtk_print_current_cr, x0, y0, x1 - x0, y1 - y0);
+ cairo_stroke(gtk_print_current_cr);
+ }
+
+ return true;
+}
+
+static bool nsgtk_print_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
+{
+ unsigned int i;
+
+ LOG("Plotting polygon.");
+
+ nsgtk_print_set_colour(style->fill_colour);
+ 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;
+}
+
+
+static bool nsgtk_print_plot_path(const float *p, unsigned int n, colour fill,
+ float width, colour c, const float transform[6])
+{
+ /* 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;
+}
+
+
+static bool nsgtk_print_plot_pixbuf(int x, int y, int width, int height,
+ struct bitmap *bitmap, colour bg)
+{
+ int x0, y0, x1, y1;
+ int dsrcx, dsrcy, dwidth, dheight;
+ int bmwidth, bmheight;
+
+ cairo_surface_t *bmsurface = bitmap->surface;
+
+ /* Bail early if we can */
+ if (width == 0 || height == 0)
+ /* Nothing to plot */
+ return true;
+ if ((x > (cliprect.x + cliprect.width)) ||
+ ((x + width) < cliprect.x) ||
+ (y > (cliprect.y + cliprect.height)) ||
+ ((y + height) < cliprect.y)) {
+ /* Image completely outside clip region */
+ return true;
+ }
+
+ /* Get clip rectangle / image rectangle edge differences */
+ x0 = cliprect.x - x;
+ y0 = cliprect.y - y;
+ x1 = (x + width) - (cliprect.x + cliprect.width);
+ y1 = (y + height) - (cliprect.y + cliprect.height);
+
+ /* Set initial draw geometry */
+ dsrcx = x;
+ dsrcy = y;
+ dwidth = width;
+ dheight = height;
+
+ /* Manually clip draw coordinates to area of image to be rendered */
+ if (x0 > 0) {
+ /* Clip left */
+ dsrcx += x0;
+ dwidth -= x0;
+ }
+ if (y0 > 0) {
+ /* Clip top */
+ dsrcy += y0;
+ dheight -= y0;
+ }
+ if (x1 > 0) {
+ /* Clip right */
+ dwidth -= x1;
+ }
+ if (y1 > 0) {
+ /* Clip bottom */
+ dheight -= y1;
+ }
+
+ if (dwidth == 0 || dheight == 0)
+ /* Nothing to plot */
+ return true;
+
+ bmwidth = cairo_image_surface_get_width(bmsurface);
+ bmheight = cairo_image_surface_get_height(bmsurface);
+
+ /* Render the bitmap */
+ if ((bmwidth == width) && (bmheight == height)) {
+ /* Bitmap is not scaled */
+ /* Plot the bitmap */
+ cairo_set_source_surface(gtk_print_current_cr, bmsurface, x, y);
+ cairo_rectangle(gtk_print_current_cr, dsrcx, dsrcy, dwidth, dheight);
+ cairo_fill(gtk_print_current_cr);
+
+ } else {
+ /* Bitmap is scaled */
+ if ((bitmap->scsurface != NULL) &&
+ ((cairo_image_surface_get_width(bitmap->scsurface) != width) ||
+ (cairo_image_surface_get_height(bitmap->scsurface) != height))){
+ cairo_surface_destroy(bitmap->scsurface);
+ bitmap->scsurface = NULL;
+ }
+
+ if (bitmap->scsurface == NULL) {
+ bitmap->scsurface = cairo_surface_create_similar(bmsurface,CAIRO_CONTENT_COLOR_ALPHA, width, height);
+ cairo_t *cr = cairo_create(bitmap->scsurface);
+
+ /* Scale *before* setting the source surface (1) */
+ cairo_scale(cr, (double)width / bmwidth, (double)height / bmheight);
+ cairo_set_source_surface(cr, bmsurface, 0, 0);
+
+ /* To avoid getting the edge pixels blended with 0
+ * alpha, which would occur with the default
+ * EXTEND_NONE. Use EXTEND_PAD for 1.2 or newer (2)
+ */
+ cairo_pattern_set_extend(cairo_get_source(cr),
+ CAIRO_EXTEND_REFLECT);
+
+ /* Replace the destination with the source instead of
+ * overlaying
+ */
+ cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+
+ /* Do the actual drawing */
+ cairo_paint(cr);
+
+ cairo_destroy(cr);
+
+ }
+ /* Plot the scaled bitmap */
+ cairo_set_source_surface(gtk_print_current_cr, bitmap->scsurface, x, y);
+ cairo_rectangle(gtk_print_current_cr, dsrcx, dsrcy, dwidth, dheight);
+ cairo_fill(gtk_print_current_cr);
+
+ }
+
+ return true;
+}
+
+
+static bool nsgtk_print_plot_bitmap(int x, int y, int width, int height,
+ struct bitmap *bitmap, colour bg,
+ bitmap_flags_t flags)
+{
+ int doneheight = 0, donewidth = 0;
+ bool repeat_x = (flags & BITMAPF_REPEAT_X);
+ bool repeat_y = (flags & BITMAPF_REPEAT_Y);
+
+ if (!(repeat_x || repeat_y)) {
+ /* Not repeating at all, so just pass it on */
+ return nsgtk_print_plot_pixbuf(x, y, width, height, bitmap, bg);
+ }
+
+ width = nsgtk_bitmap_get_width(bitmap);
+ height = nsgtk_bitmap_get_height(bitmap);
+
+ /* Bail early if we can */
+ if (width == 0 || height == 0)
+ /* Nothing to plot */
+ return true;
+
+ 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, bitmap, bg);
+ donewidth += width;
+ if (!repeat_x)
+ break;
+ }
+ doneheight += height;
+
+ if (!repeat_y)
+ break;
+ }
+
+ 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, &gtk_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(&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, user_data);
+}
+
+