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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2010 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "spice-widget.h"
#include "spice-widget-priv.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Some compatibility defines to let us build on both Gtk2 and Gtk3 */
#if GTK_CHECK_VERSION (2, 91, 0)
static inline void gdk_drawable_get_size(GdkWindow *w, gint *ww, gint *wh)
{
*ww = gdk_window_get_width(w);
*wh = gdk_window_get_height(w);
}
#endif
G_GNUC_INTERNAL
int spicex_image_create(SpiceDisplay *display)
{
SpiceDisplayPrivate *d = SPICE_DISPLAY_GET_PRIVATE(display);
if (d->ximage != NULL)
return 0;
if (d->format == SPICE_SURFACE_FMT_16_555 ||
d->format == SPICE_SURFACE_FMT_16_565) {
d->convert = TRUE;
d->data = g_malloc0(d->area.width * d->area.height * 4);
d->ximage = cairo_image_surface_create_for_data
(d->data, CAIRO_FORMAT_RGB24, d->area.width, d->area.height, d->area.width * 4);
} else {
d->convert = FALSE;
d->ximage = cairo_image_surface_create_for_data
(d->data, CAIRO_FORMAT_RGB24, d->width, d->height, d->stride);
}
return 0;
}
G_GNUC_INTERNAL
void spicex_image_destroy(SpiceDisplay *display)
{
SpiceDisplayPrivate *d = SPICE_DISPLAY_GET_PRIVATE(display);
if (d->ximage) {
cairo_surface_finish(d->ximage);
d->ximage = NULL;
}
if (d->convert && d->data) {
g_free(d->data);
d->data = NULL;
}
d->convert = FALSE;
}
#if !GTK_CHECK_VERSION (3, 0, 0)
#define cairo_rectangle_int_t GdkRectangle
#define cairo_region_t GdkRegion
#define cairo_region_create_rectangle gdk_region_rectangle
#define cairo_region_subtract_rectangle(_dest,_rect) { GdkRegion *_region = gdk_region_rectangle (_rect); gdk_region_subtract (_dest, _region); gdk_region_destroy (_region); }
#define cairo_region_destroy gdk_region_destroy
#endif
G_GNUC_INTERNAL
void spicex_draw_event(SpiceDisplay *display, cairo_t *cr)
{
SpiceDisplayPrivate *d = SPICE_DISPLAY_GET_PRIVATE(display);
cairo_rectangle_int_t rect;
cairo_region_t *region;
double s;
int x, y;
int ww, wh;
int w, h;
spice_display_get_scaling(display, &s, &x, &y, &w, &h);
gdk_drawable_get_size(gtk_widget_get_window(GTK_WIDGET(display)), &ww, &wh);
/* We need to paint the bg color around the image */
rect.x = 0;
rect.y = 0;
rect.width = ww;
rect.height = wh;
region = cairo_region_create_rectangle(&rect);
/* Optionally cut out the inner area where the pixmap
will be drawn. This avoids 'flashing' since we're
not double-buffering. */
if (d->ximage) {
rect.x = x;
rect.y = y;
rect.width = w;
rect.height = h;
cairo_region_subtract_rectangle(region, &rect);
}
gdk_cairo_region (cr, region);
cairo_region_destroy (region);
/* Need to set a real solid color, because the default is usually
transparent these days, and non-double buffered windows can't
render transparently */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_fill(cr);
/* Draw the display */
if (d->ximage) {
cairo_translate(cr, x, y);
cairo_rectangle(cr, 0, 0, w, h);
cairo_scale(cr, s, s);
if (!d->convert)
cairo_translate(cr, -d->area.x, -d->area.y);
cairo_set_source_surface(cr, d->ximage, 0, 0);
cairo_fill(cr);
if (d->mouse_mode == SPICE_MOUSE_MODE_SERVER &&
!d->show_cursor) {
GdkPixbuf *image = d->mouse_pixbuf;
if (image != NULL) {
gdk_cairo_set_source_pixbuf(cr, image,
d->mouse_guest_x - d->mouse_hotspot.x,
d->mouse_guest_y - d->mouse_hotspot.y);
cairo_paint(cr);
}
}
}
}
#if ! GTK_CHECK_VERSION (2, 91, 0)
G_GNUC_INTERNAL
void spicex_expose_event(SpiceDisplay *display, GdkEventExpose *expose)
{
cairo_t *cr;
cr = gdk_cairo_create(gtk_widget_get_window(GTK_WIDGET(display)));
cairo_rectangle(cr,
expose->area.x,
expose->area.y,
expose->area.width,
expose->area.height);
cairo_clip(cr);
spicex_draw_event(display, cr);
cairo_destroy(cr);
}
#endif
G_GNUC_INTERNAL
gboolean spicex_is_scaled(SpiceDisplay *display)
{
SpiceDisplayPrivate *d = SPICE_DISPLAY_GET_PRIVATE(display);
return d->allow_scaling;
}
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