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/* this file is part of evince, a gnome document viewer
*
* Copyright (C) 2005 Jonathan Blandford <jrb@gnome.org>
*
* Evince 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 2 of the License, or
* (at your option) any later version.
*
* Evince 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include "ev-render-context.h"
static void ev_render_context_init (EvRenderContext *rc);
static void ev_render_context_class_init (EvRenderContextClass *class);
G_DEFINE_TYPE (EvRenderContext, ev_render_context, G_TYPE_OBJECT);
#define FLIP_DIMENSIONS(rc) ((rc)->rotation == 90 || (rc)->rotation == 270)
static void ev_render_context_init (EvRenderContext *rc) { /* Do Nothing */ }
static void
ev_render_context_dispose (GObject *object)
{
EvRenderContext *rc;
rc = (EvRenderContext *) object;
g_clear_object (&rc->page);
(* G_OBJECT_CLASS (ev_render_context_parent_class)->dispose) (object);
}
static void
ev_render_context_class_init (EvRenderContextClass *class)
{
GObjectClass *oclass;
oclass = G_OBJECT_CLASS (class);
oclass->dispose = ev_render_context_dispose;
}
EvRenderContext *
ev_render_context_new (EvPage *page,
gint rotation,
gdouble scale)
{
EvRenderContext *rc;
rc = (EvRenderContext *) g_object_new (EV_TYPE_RENDER_CONTEXT, NULL);
rc->page = page ? g_object_ref (page) : NULL;
rc->rotation = rotation;
rc->scale = scale;
rc->target_width = -1;
rc->target_height = -1;
return rc;
}
void
ev_render_context_set_page (EvRenderContext *rc,
EvPage *page)
{
g_return_if_fail (rc != NULL);
g_return_if_fail (EV_IS_PAGE (page));
if (rc->page)
g_object_unref (rc->page);
rc->page = g_object_ref (page);
}
void
ev_render_context_set_rotation (EvRenderContext *rc,
int rotation)
{
g_return_if_fail (rc != NULL);
rc->rotation = rotation;
}
void
ev_render_context_set_scale (EvRenderContext *rc,
gdouble scale)
{
g_return_if_fail (rc != NULL);
rc->scale = scale;
}
void
ev_render_context_set_target_size (EvRenderContext *rc,
int target_width,
int target_height)
{
g_return_if_fail (rc != NULL);
rc->target_width = target_width;
rc->target_height = target_height;
}
void
ev_render_context_compute_scaled_size (EvRenderContext *rc,
double width_points,
double height_points,
int *scaled_width,
int *scaled_height)
{
g_return_if_fail (rc != NULL);
if (scaled_width) {
if (rc->target_width >= 0) {
*scaled_width = FLIP_DIMENSIONS (rc) ? rc->target_height : rc->target_width;
} else {
*scaled_width = (int) (width_points * rc->scale + 0.5);
}
}
if (scaled_height) {
if (rc->target_height >= 0) {
*scaled_height = FLIP_DIMENSIONS (rc) ? rc->target_width : rc->target_height;
} else {
*scaled_height = (int) (height_points * rc->scale + 0.5);
}
}
}
void
ev_render_context_compute_transformed_size (EvRenderContext *rc,
double width_points,
double height_points,
int *transformed_width,
int *transformed_height)
{
int scaled_width, scaled_height;
g_return_if_fail (rc != NULL);
ev_render_context_compute_scaled_size (rc, width_points, height_points,
&scaled_width, &scaled_height);
if (transformed_width)
*transformed_width = FLIP_DIMENSIONS (rc) ? scaled_height : scaled_width;
if (transformed_height)
*transformed_height = FLIP_DIMENSIONS (rc) ? scaled_width : scaled_height;
}
void
ev_render_context_compute_scales (EvRenderContext *rc,
double width_points,
double height_points,
double *scale_x,
double *scale_y)
{
int scaled_width, scaled_height;
g_return_if_fail (rc != NULL);
ev_render_context_compute_scaled_size (rc, width_points, height_points,
&scaled_width, &scaled_height);
if (scale_x)
*scale_x = scaled_width / width_points;
if (scale_y)
*scale_y = scaled_height / height_points;
}
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