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/*
* slide_render.c
*
* Colloquium - A tiny presentation program
*
* Copyright (c) 2011 Thomas White <taw@bitwiz.org.uk>
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cairo.h>
#include <pango/pangocairo.h>
#include <assert.h>
#include "slide_render.h"
#include "presentation.h"
#include "objects.h"
#include "stylesheet.h"
static cairo_surface_t *render_slide(struct slide *s, int w, int h)
{
cairo_surface_t *surf;
cairo_t *cr;
int i;
surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
cr = cairo_create(surf);
cairo_rectangle(cr, 0.0, 0.0, w, h);
cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
cairo_fill(cr);
cairo_scale(cr, w/s->parent->slide_width, h/s->parent->slide_height);
for ( i=0; i<s->num_objects; i++ ) {
struct object *o = s->objects[i];
o->render_object(cr, o);
}
cairo_destroy(cr);
return surf;
}
void redraw_slide(struct slide *s)
{
int w, h;
if ( s->rendered_thumb != NULL ) {
cairo_surface_destroy(s->rendered_thumb);
}
w = s->parent->thumb_slide_width;
h = (s->parent->slide_height/s->parent->slide_width) * w;
s->rendered_thumb = render_slide(s, w, h);
/* FIXME: Request redraw for slide sorter if open */
/* Is this slide currently open in the editor? */
if ( s == s->parent->cur_edit_slide ) {
if ( s->rendered_edit != NULL ) {
cairo_surface_destroy(s->rendered_edit);
}
w = s->parent->edit_slide_width;
h = (s->parent->slide_height/s->parent->slide_width) * w;
s->rendered_edit = render_slide(s, w, h);
gdk_window_invalidate_rect(s->parent->drawingarea->window,
NULL, FALSE);
}
/* Is this slide currently being displayed on the projector? */
if ( s == s->parent->cur_proj_slide ) {
if ( s->rendered_proj != NULL ) {
cairo_surface_destroy(s->rendered_proj);
}
w = s->parent->proj_slide_width;
h = (s->parent->slide_height/s->parent->slide_width) * w;
s->rendered_proj = render_slide(s, w, h);
gdk_window_invalidate_rect(s->parent->ss_drawingarea->window,
NULL, FALSE);
}
}
void draw_editing_box(cairo_t *cr, double xmin, double ymin,
double width, double height)
{
const double dash[] = {2.0, 2.0};
cairo_new_path(cr);
cairo_rectangle(cr, xmin-5.0, ymin-5.0, width+10.0, height+10.0);
cairo_set_source_rgb(cr, 0.0, 0.69, 1.0);
cairo_set_line_width(cr, 0.5);
cairo_stroke(cr);
cairo_new_path(cr);
cairo_rectangle(cr, xmin, ymin, width, height);
cairo_set_dash(cr, dash, 2, 0.0);
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_set_line_width(cr, 0.1);
cairo_stroke(cr);
cairo_set_dash(cr, NULL, 0, 0.0);
}
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