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/*
* Copyright (C) 2007 the xine project
*
* This file is part of xine, a free video player.
*
* xine 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.
*
* xine 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 <xine/xine_internal.h>
#include <xine/spu.h>
#define BLACK_OPACITY 67
#define COLOUR_OPACITY 100
static void no_op (void *user_data, xine_cfg_entry_t *entry)
{
}
void _x_spu_misc_init (xine_t *this)
{
this->config->register_range (this->config, "subtitles.bitmap.black_opacity",
BLACK_OPACITY, 0, 100,
_("opacity for the black parts of bitmapped subtitles"),
NULL,
10, no_op, NULL);
this->config->register_range (this->config, "subtitles.bitmap.colour_opacity",
COLOUR_OPACITY, 0, 100,
_("opacity for the colour parts of bitmapped subtitles"),
NULL,
10, no_op, NULL);
}
void _x_spu_get_opacity (xine_t *this, xine_spu_opacity_t *opacity)
{
cfg_entry_t *entry;
entry = this->config->lookup_entry (this->config, "subtitles.bitmap.black_opacity");
opacity->black = entry ? entry->num_value : BLACK_OPACITY;
entry = this->config->lookup_entry (this->config, "subtitles.bitmap.colour_opacity");
opacity->colour = entry ? entry->num_value : COLOUR_OPACITY;
}
int _x_spu_calculate_opacity (const clut_t *clut, uint8_t trans, const xine_spu_opacity_t *opacity)
{
int value = (clut->y == 0 || (clut->y == 16 && clut->cb == 128 && clut->cr == 128))
? opacity->black
: opacity->colour;
return value * (255 - trans) / 100;
}
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