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/*
* render.c
*
* Copyright © 2013-2019 Thomas White <taw@bitwiz.org.uk>
*
* This file is part of Colloquium.
*
* Colloquium 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 <cairo-pdf.h>
#include <pango/pangocairo.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include "presentation.h"
#include "slide.h"
#include "narrative.h"
#include "stylesheet.h"
#include "slide_priv.h"
static double lcalc(struct length l, double pd)
{
if ( l.unit == LENGTH_UNIT ) {
return l.len;
} else {
return l.len * pd;
}
}
static void render_text(struct slide_item *item, cairo_t *cr,
double parent_w, double parent_h)
{
cairo_rectangle(cr, lcalc(item->geom.x, parent_w),
lcalc(item->geom.y, parent_h),
lcalc(item->geom.w, parent_w),
lcalc(item->geom.h, parent_h));
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_set_line_width(cr, 1.0);
cairo_stroke(cr);
}
static void render_image(struct slide_item *item, cairo_t *cr,
double parent_w, double parent_h)
{
cairo_rectangle(cr, lcalc(item->geom.x, parent_w),
lcalc(item->geom.y, parent_h),
lcalc(item->geom.w, parent_w),
lcalc(item->geom.h, parent_h));
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_set_line_width(cr, 1.0);
cairo_stroke_preserve(cr);
cairo_set_source_rgba(cr, 0.0, 0.5, 0.0, 0.5);
cairo_fill(cr);
}
int slide_render_cairo(Slide *s, cairo_t *cr, Stylesheet *stylesheet,
int slide_number, PangoLanguage *lang, PangoContext *pc)
{
int i;
/* Overall default background */
cairo_rectangle(cr, 0.0, 0.0, s->logical_w, s->logical_h);
cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
cairo_fill(cr);
for ( i=0; i<s->n_items; i++ ) {
switch ( s->items[i].type ) {
case SLIDE_ITEM_TEXT :
render_text(&s->items[i], cr, s->logical_w, s->logical_h);
break;
case SLIDE_ITEM_IMAGE :
render_image(&s->items[i], cr, s->logical_w, s->logical_h);
break;
default :
break;
}
}
return 0;
}
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