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/*************************************************************************
* Copyright (C) 2010-2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* 16-bit RGBA canvas optimizer.
*/
#include "dimension-internal.h"
#include <stdint.h>
void
dmnsn_rgba16_optimize_canvas(dmnsn_canvas *canvas)
{
/* Check if we've already optimized this canvas */
DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer *, i, canvas->optimizers) {
if (i->optimizer_fn == dmnsn_rgba16_optimizer_fn) {
return;
}
}
dmnsn_canvas_optimizer optimizer;
optimizer.optimizer_fn = dmnsn_rgba16_optimizer_fn;
optimizer.free_fn = dmnsn_free;
optimizer.ptr = dmnsn_malloc(4*canvas->width*canvas->height*sizeof(uint16_t));
dmnsn_canvas_optimize(canvas, optimizer);
}
/* PNG optimizer callback */
void
dmnsn_rgba16_optimizer_fn(const dmnsn_canvas *canvas,
dmnsn_canvas_optimizer optimizer, size_t x, size_t y)
{
uint8_t *pixel = (uint8_t *)optimizer.ptr + 4*(y*canvas->width + x);
dmnsn_color color;
color = dmnsn_canvas_get_pixel(canvas, x, y);
color = dmnsn_remove_filter(color);
color = dmnsn_color_to_sRGB(color);
color = dmnsn_color_saturate(color);
pixel[0] = lround(color.R*UINT8_MAX);
pixel[1] = lround(color.G*UINT8_MAX);
pixel[2] = lround(color.B*UINT8_MAX);
pixel[3] = lround(color.trans*UINT8_MAX);
}
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