d06cb3dabb
https://bugzilla.gnome.org/show_bug.cgi?id=691354 origin commit: https://git.gnome.org/browse/evince/commit/?h=gnome-3-8&id=7917b62
487 lines
13 KiB
C
487 lines
13 KiB
C
/*
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* Copyright (C) 2009 Juanjo Marín <juanj.marin@juntadeandalucia.es>
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* Copyright (c) 2007 Carlos Garcia Campos <carlosgc@gnome.org>
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* Copyright (C) 2000-2003 Marco Pesenti Gritti
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*
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* This program 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; either version 2, or (at your option)
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* any later version.
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*
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* This program 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <string.h>
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#include <math.h>
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#include <gtk/gtk.h>
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#include "ev-document-misc.h"
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/* Returns a new GdkPixbuf that is suitable for placing in the thumbnail view.
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* It is four pixels wider and taller than the source. If source_pixbuf is not
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* NULL, then it will fill the return pixbuf with the contents of
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* source_pixbuf.
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*/
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static GdkPixbuf *
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create_thumbnail_frame (int width,
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int height,
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GdkPixbuf *source_pixbuf,
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gboolean fill_bg)
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{
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GdkPixbuf *retval;
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guchar *data;
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gint rowstride;
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int i;
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int width_r, height_r;
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if (source_pixbuf)
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g_return_val_if_fail (GDK_IS_PIXBUF (source_pixbuf), NULL);
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if (source_pixbuf) {
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width_r = gdk_pixbuf_get_width (source_pixbuf);
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height_r = gdk_pixbuf_get_height (source_pixbuf);
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} else {
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width_r = width;
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height_r = height;
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}
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/* make sure no one is passing us garbage */
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g_return_val_if_fail (width_r >= 0 && height_r >= 0, NULL);
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retval = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
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TRUE, 8,
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width_r + 4,
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height_r + 4);
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/* make it black and fill in the middle */
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data = gdk_pixbuf_get_pixels (retval);
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rowstride = gdk_pixbuf_get_rowstride (retval);
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gdk_pixbuf_fill (retval, 0x000000ff);
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if (fill_bg) {
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for (i = 1; i < height_r + 1; i++)
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memset (data + (rowstride * i) + 4, 0xffffffff, width_r * 4);
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}
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/* copy the source pixbuf */
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if (source_pixbuf)
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gdk_pixbuf_copy_area (source_pixbuf, 0, 0,
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width_r,
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height_r,
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retval,
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1, 1);
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/* Add the corner */
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data [(width_r + 2) * 4 + 3] = 0;
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data [(width_r + 3) * 4 + 3] = 0;
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data [(width_r + 2) * 4 + (rowstride * 1) + 3] = 0;
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data [(width_r + 3) * 4 + (rowstride * 1) + 3] = 0;
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data [(height_r + 2) * rowstride + 3] = 0;
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data [(height_r + 3) * rowstride + 3] = 0;
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data [(height_r + 2) * rowstride + 4 + 3] = 0;
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data [(height_r + 3) * rowstride + 4 + 3] = 0;
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return retval;
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}
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/**
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* ev_document_misc_get_thumbnail_frame:
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* @width: the desired width
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* @height: the desired height
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* @source_pixbuf: a #GdkPixbuf
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*
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* Returns: (transfer full): a #GdkPixbuf
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*/
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GdkPixbuf *
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ev_document_misc_get_thumbnail_frame (int width,
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int height,
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GdkPixbuf *source_pixbuf)
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{
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return create_thumbnail_frame (width, height, source_pixbuf, TRUE);
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}
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/**
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* ev_document_misc_get_loading_thumbnail:
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* @width: the desired width
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* @height: the desired height
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* @inverted_colors: whether to invert colors
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*
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* Returns: (transfer full): a #GdkPixbuf
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*/
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GdkPixbuf *
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ev_document_misc_get_loading_thumbnail (int width,
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int height,
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gboolean inverted_colors)
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{
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return create_thumbnail_frame (width, height, NULL, !inverted_colors);
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}
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void
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ev_document_misc_get_page_border_size (gint page_width,
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gint page_height,
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GtkBorder *border)
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{
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g_assert (border);
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border->left = 1;
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border->top = 1;
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if (page_width < 100) {
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border->right = 2;
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border->bottom = 2;
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} else if (page_width < 500) {
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border->right = 3;
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border->bottom = 3;
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} else {
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border->right = 4;
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border->bottom = 4;
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}
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}
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void
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ev_document_misc_paint_one_page (cairo_t *cr,
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GtkWidget *widget,
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GdkRectangle *area,
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GtkBorder *border,
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gboolean highlight,
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gboolean inverted_colors)
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{
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GtkStyleContext *context = gtk_widget_get_style_context (widget);
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GtkStateFlags state = gtk_widget_get_state_flags (widget);
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GdkRGBA fg, bg, shade_bg;
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gtk_style_context_get_background_color (context, state, &bg);
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gtk_style_context_get_color (context, state, &fg);
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gtk_style_context_get_color (context, state, &shade_bg);
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shade_bg.alpha *= 0.5;
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gdk_cairo_set_source_rgba (cr, highlight ? &fg : &shade_bg);
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cairo_rectangle (cr,
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area->x,
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area->y,
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area->width - border->right + border->left,
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area->height - border->bottom + border->top);
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cairo_rectangle (cr,
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area->x + area->width - border->right,
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area->y + border->right - border->left,
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border->right,
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area->height - border->right + border->left);
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cairo_rectangle (cr,
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area->x + border->bottom - border->top,
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area->y + area->height - border->bottom,
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area->width - border->bottom + border->top,
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border->bottom);
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cairo_fill (cr);
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if (inverted_colors)
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cairo_set_source_rgb (cr, 0, 0, 0);
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else
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cairo_set_source_rgb (cr, 1, 1, 1);
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cairo_rectangle (cr,
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area->x + border->left,
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area->y + border->top,
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area->width - (border->left + border->right),
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area->height - (border->top + border->bottom));
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cairo_fill (cr);
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}
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cairo_surface_t *
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ev_document_misc_surface_from_pixbuf (GdkPixbuf *pixbuf)
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{
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cairo_surface_t *surface;
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cairo_t *cr;
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g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
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surface = cairo_image_surface_create (gdk_pixbuf_get_has_alpha (pixbuf) ?
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CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
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gdk_pixbuf_get_width (pixbuf),
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gdk_pixbuf_get_height (pixbuf));
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cr = cairo_create (surface);
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gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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return surface;
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}
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/**
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* ev_document_misc_pixbuf_from_surface:
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* @surface: a #cairo_surface_t
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*
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* Returns: (transfer full): a #GdkPixbuf
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*/
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GdkPixbuf *
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ev_document_misc_pixbuf_from_surface (cairo_surface_t *surface)
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{
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g_return_val_if_fail (surface, NULL);
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GdkPixbuf *pixbuf;
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cairo_surface_t *image;
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cairo_t *cr;
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gboolean has_alpha;
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gint width, height;
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cairo_format_t surface_format;
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gint pixbuf_n_channels;
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gint pixbuf_rowstride;
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guchar *pixbuf_pixels;
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gint x, y;
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width = cairo_image_surface_get_width (surface);
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height = cairo_image_surface_get_height (surface);
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surface_format = cairo_image_surface_get_format (surface);
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has_alpha = (surface_format == CAIRO_FORMAT_ARGB32);
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pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
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TRUE, 8,
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width, height);
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pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf);
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pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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pixbuf_pixels = gdk_pixbuf_get_pixels (pixbuf);
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image = cairo_image_surface_create_for_data (pixbuf_pixels,
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surface_format,
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width, height,
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pixbuf_rowstride);
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cr = cairo_create (image);
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cairo_set_source_surface (cr, surface, 0, 0);
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if (has_alpha)
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cairo_mask_surface (cr, surface, 0, 0);
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else
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cairo_paint (cr);
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cairo_destroy (cr);
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cairo_surface_destroy (image);
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for (y = 0; y < height; y++) {
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guchar *p = pixbuf_pixels + y * pixbuf_rowstride;
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for (x = 0; x < width; x++) {
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guchar tmp;
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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tmp = p[0];
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p[0] = p[2];
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p[2] = tmp;
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p[3] = (has_alpha) ? p[3] : 0xff;
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#else
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tmp = p[0];
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p[0] = p[1];
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p[1] = p[2];
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p[2] = p[3];
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p[3] = (has_alpha) ? tmp : 0xff;
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#endif
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p += pixbuf_n_channels;
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}
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}
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return pixbuf;
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}
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cairo_surface_t *
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ev_document_misc_surface_rotate_and_scale (cairo_surface_t *surface,
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gint dest_width,
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gint dest_height,
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gint dest_rotation)
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{
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cairo_surface_t *new_surface;
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cairo_t *cr;
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gint width, height;
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gint new_width = dest_width;
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gint new_height = dest_height;
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width = cairo_image_surface_get_width (surface);
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height = cairo_image_surface_get_height (surface);
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if (dest_width == width &&
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dest_height == height &&
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dest_rotation == 0) {
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return cairo_surface_reference (surface);
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}
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if (dest_rotation == 90 || dest_rotation == 270) {
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new_width = dest_height;
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new_height = dest_width;
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}
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new_surface = cairo_surface_create_similar (surface,
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cairo_surface_get_content (surface),
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new_width, new_height);
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cr = cairo_create (new_surface);
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switch (dest_rotation) {
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case 90:
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cairo_translate (cr, new_width, 0);
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break;
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case 180:
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cairo_translate (cr, new_width, new_height);
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break;
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case 270:
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cairo_translate (cr, 0, new_height);
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break;
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default:
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cairo_translate (cr, 0, 0);
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}
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cairo_rotate (cr, dest_rotation * G_PI / 180.0);
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if (dest_width != width || dest_height != height) {
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cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_BILINEAR);
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cairo_scale (cr,
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(gdouble)dest_width / width,
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(gdouble)dest_height / height);
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}
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cairo_set_source_surface (cr, surface, 0, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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return new_surface;
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}
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void
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ev_document_misc_invert_surface (cairo_surface_t *surface) {
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cairo_t *cr;
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cr = cairo_create (surface);
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/* white + DIFFERENCE -> invert */
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cairo_set_operator (cr, CAIRO_OPERATOR_DIFFERENCE);
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cairo_set_source_rgb (cr, 1., 1., 1.);
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cairo_paint(cr);
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cairo_destroy (cr);
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}
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void
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ev_document_misc_invert_pixbuf (GdkPixbuf *pixbuf)
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{
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guchar *data, *p;
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guint width, height, x, y, rowstride, n_channels;
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n_channels = gdk_pixbuf_get_n_channels (pixbuf);
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g_assert (gdk_pixbuf_get_colorspace (pixbuf) == GDK_COLORSPACE_RGB);
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g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
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/* First grab a pointer to the raw pixel data. */
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data = gdk_pixbuf_get_pixels (pixbuf);
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/* Find the number of bytes per row (could be padded). */
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rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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for (x = 0; x < width; x++) {
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for (y = 0; y < height; y++) {
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/* Calculate pixel's offset into the data array. */
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p = data + x * n_channels + y * rowstride;
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/* Change the RGB values*/
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p[0] = 255 - p[0];
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p[1] = 255 - p[1];
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p[2] = 255 - p[2];
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}
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}
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}
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gdouble
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#if GTK_CHECK_VERSION (3, 22, 0)
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ev_document_misc_get_screen_dpi (GdkScreen *screen, GdkMonitor *monitor)
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#else
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ev_document_misc_get_screen_dpi (GdkScreen *screen, gint monitor)
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#endif
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{
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gdouble dp, di;
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gint sc_width, sc_height;
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gdk_window_get_geometry (gdk_screen_get_root_window (screen), NULL, NULL,
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&sc_width, &sc_height);
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/*diagonal in pixels*/
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dp = hypot (sc_width, sc_height);
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/*diagonal in inches*/
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#if GTK_CHECK_VERSION (3, 22, 0)
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di = hypot (gdk_monitor_get_width_mm(monitor), gdk_monitor_get_height_mm (monitor)) / 25.4;
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di /= gdk_monitor_get_scale_factor (monitor);
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#else
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di = hypot (gdk_screen_get_width_mm(screen), gdk_screen_get_height_mm (screen)) / 25.4;
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di /= gdk_screen_get_monitor_scale_factor(screen, monitor);
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#endif
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return (dp / di);
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}
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/* Returns a locale specific date and time representation */
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gchar *
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ev_document_misc_format_date (GTime utime)
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{
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time_t time = (time_t) utime;
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char s[256];
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const char fmt_hack[] = "%c";
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size_t len;
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#ifdef HAVE_LOCALTIME_R
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struct tm t;
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if (time == 0 || !localtime_r (&time, &t)) return NULL;
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len = strftime (s, sizeof (s), fmt_hack, &t);
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#else
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struct tm *t;
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if (time == 0 || !(t = localtime (&time)) ) return NULL;
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len = strftime (s, sizeof (s), fmt_hack, t);
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#endif
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if (len == 0 || s[0] == '\0') return NULL;
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return g_locale_to_utf8 (s, -1, NULL, NULL, NULL);
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}
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void
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ev_document_misc_get_pointer_position (GtkWidget *widget,
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gint *x,
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gint *y)
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{
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#if GTK_CHECK_VERSION (3, 20, 0)
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GdkSeat *seat;
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#else
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GdkDeviceManager *device_manager;
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#endif
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GdkDevice *device_pointer;
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GdkRectangle allocation;
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if (x)
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*x = -1;
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if (y)
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*y = -1;
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if (!gtk_widget_get_realized (widget))
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return;
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#if GTK_CHECK_VERSION (3, 20, 0)
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seat = gdk_display_get_default_seat (gtk_widget_get_display (widget));
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device_pointer = gdk_seat_get_pointer (seat);
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#else
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device_manager = gdk_display_get_device_manager (gtk_widget_get_display (widget));
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device_pointer = gdk_device_manager_get_client_pointer (device_manager);
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#endif
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gdk_window_get_device_position (gtk_widget_get_window (widget),
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device_pointer,
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x, y, NULL);
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if (gtk_widget_get_has_window (widget))
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return;
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gtk_widget_get_allocation (widget, &allocation);
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if (x)
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*x -= allocation.x;
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if (y)
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*y -= allocation.y;
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}
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