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/*************************************************************************
* Copyright (C) 2009-2011 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
* Textures.
*/
#include "dimension-internal.h"
/* Allocate a dummy texture */
dmnsn_texture *
dmnsn_new_texture(void)
{
dmnsn_texture *texture = dmnsn_malloc(sizeof(dmnsn_texture));
texture->pigment = NULL;
texture->finish = dmnsn_new_finish();
texture->trans = dmnsn_identity_matrix();
texture->refcount = 1;
texture->initialized = false;
return texture;
}
/* Free a texture */
void
dmnsn_delete_texture(dmnsn_texture *texture)
{
if (DMNSN_DECREF(texture)) {
dmnsn_delete_finish(texture->finish);
dmnsn_delete_pigment(texture->pigment);
dmnsn_free(texture);
}
}
/* Calculate matrix inverses */
void
dmnsn_texture_initialize(dmnsn_texture *texture)
{
dmnsn_assert(!texture->initialized, "Texture double-initialized.");
texture->initialized = true;
texture->trans_inv = dmnsn_matrix_inverse(texture->trans);
if (!texture->pigment->initialized) {
texture->pigment->trans = dmnsn_matrix_mul(texture->trans,
texture->pigment->trans);
dmnsn_pigment_initialize(texture->pigment);
}
}
/* Cascade a texture */
void
dmnsn_texture_cascade(dmnsn_texture *default_texture,
dmnsn_texture **texturep)
{
if (!*texturep) {
*texturep = default_texture;
DMNSN_INCREF(*texturep);
}
dmnsn_texture *texture = *texturep;
if (!texture->pigment) {
texture->pigment = default_texture->pigment;
DMNSN_INCREF(texture->pigment);
}
dmnsn_finish_cascade(&default_texture->finish, &texture->finish);
}
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