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// SPDX-License-Identifier: GPL-2.0-or-later
/* this file is part of papers, a gnome document viewer
*
* Copyright (C) 2005 Jonathan Blandford <jrb@gnome.org>
*/
#include "pps-render-context.h"
#include <config.h>
static void pps_render_context_init (PpsRenderContext *rc);
static void pps_render_context_class_init (PpsRenderContextClass *class);
G_DEFINE_TYPE (PpsRenderContext, pps_render_context, G_TYPE_OBJECT);
#define FLIP_DIMENSIONS(rc) ((rc)->rotation == 90 || (rc)->rotation == 270)
static void
pps_render_context_init (PpsRenderContext *rc)
{ /* Do Nothing */
}
static void
pps_render_context_dispose (GObject *object)
{
PpsRenderContext *rc;
rc = (PpsRenderContext *) object;
g_clear_object (&rc->page);
(*G_OBJECT_CLASS (pps_render_context_parent_class)->dispose) (object);
}
static void
pps_render_context_class_init (PpsRenderContextClass *class)
{
GObjectClass *oclass;
oclass = G_OBJECT_CLASS (class);
oclass->dispose = pps_render_context_dispose;
}
PpsRenderContext *
pps_render_context_new (PpsPage *page,
gint rotation,
gdouble scale,
PpsRenderAnnotsFlags annot_flags)
{
PpsRenderContext *rc;
rc = (PpsRenderContext *) g_object_new (PPS_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;
rc->annot_flags = annot_flags;
return rc;
}
void
pps_render_context_set_page (PpsRenderContext *rc,
PpsPage *page)
{
g_return_if_fail (rc != NULL);
g_return_if_fail (PPS_IS_PAGE (page));
g_set_object (&rc->page, page);
}
void
pps_render_context_set_rotation (PpsRenderContext *rc,
int rotation)
{
g_return_if_fail (rc != NULL);
rc->rotation = rotation;
}
void
pps_render_context_set_scale (PpsRenderContext *rc,
gdouble scale)
{
g_return_if_fail (rc != NULL);
rc->scale = scale;
}
void
pps_render_context_set_target_size (PpsRenderContext *rc,
int target_width,
int target_height)
{
g_return_if_fail (rc != NULL);
rc->target_width = target_width;
rc->target_height = target_height;
}
/**
* pps_render_context_compute_scaled_size:
* @rc: an #PpsRenderContext
* @width_points:
* @height_points:
* @scaled_width: (out):
* @scaled_height: (out):
*
*/
void
pps_render_context_compute_scaled_size (PpsRenderContext *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);
}
}
}
/**
* pps_render_context_compute_transformed_size:
* @rc: an #PpsRenderContext
* @width_points:
* @height_points:
* @transformed_width: (out):
* @transformed_height: (out):
*
*/
void
pps_render_context_compute_transformed_size (PpsRenderContext *rc,
double width_points,
double height_points,
int *transformed_width,
int *transformed_height)
{
int scaled_width, scaled_height;
g_return_if_fail (rc != NULL);
pps_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;
}
/**
* pps_render_context_compute_scales:
* @rc: an #PpsRenderContext
* @width_points:
* @height_points:
* @scale_x: (out):
* @scale_y: (out):
*
*/
void
pps_render_context_compute_scales (PpsRenderContext *rc,
double width_points,
double height_points,
double *scale_x,
double *scale_y)
{
int scaled_width, scaled_height;
g_return_if_fail (rc != NULL);
pps_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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