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/*************************************************************************
* Copyright (C) 2009-2010 Tavian Barnes <tavianator@gmail.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, pigments, and finishes.
*/
#include "dimension.h"
#include <stdlib.h>
/* Allocate a dummy pigment */
dmnsn_pigment *
dmnsn_new_pigment(void)
{
dmnsn_pigment *pigment = dmnsn_malloc(sizeof(dmnsn_pigment));
pigment->pigment_fn = NULL;
pigment->initialize_fn = NULL;
pigment->free_fn = NULL;
pigment->trans = dmnsn_identity_matrix();
pigment->quick_color = dmnsn_black;
return pigment;
}
/* Free a pigment */
void
dmnsn_delete_pigment(dmnsn_pigment *pigment)
{
if (pigment) {
if (pigment->free_fn) {
(*pigment->free_fn)(pigment->ptr);
}
dmnsn_free(pigment);
}
}
/* Precompute pigment properties */
void
dmnsn_initialize_pigment(dmnsn_pigment *pigment)
{
if (pigment->initialize_fn) {
(*pigment->initialize_fn)(pigment);
}
pigment->trans_inv = dmnsn_matrix_inverse(pigment->trans);
}
/* Allocate a dummy finish */
dmnsn_finish *
dmnsn_new_finish(void)
{
dmnsn_finish *finish = dmnsn_malloc(sizeof(dmnsn_finish));
finish->diffuse_fn = NULL;
finish->specular_fn = NULL;
finish->ambient_fn = NULL;
finish->reflection_fn = NULL;
finish->free_fn = NULL;
return finish;
}
/* Free a finish */
void
dmnsn_delete_finish(dmnsn_finish *finish)
{
if (finish) {
if (finish->free_fn) {
(*finish->free_fn)(finish->ptr);
}
dmnsn_free(finish);
}
}
/* Allocate a dummy texture */
dmnsn_texture *
dmnsn_new_texture(void)
{
dmnsn_texture *texture = dmnsn_malloc(sizeof(dmnsn_texture));
texture->pigment = NULL;
texture->finish = NULL;
texture->trans = dmnsn_identity_matrix();
texture->refcount = dmnsn_malloc(sizeof(unsigned int));
*texture->refcount = 1;
texture->should_init = true;
return texture;
}
/* Free a texture */
void
dmnsn_delete_texture(dmnsn_texture *texture)
{
if (texture) {
if (*texture->refcount <= 1) {
dmnsn_delete_finish(texture->finish);
dmnsn_delete_pigment(texture->pigment);
dmnsn_free(texture->refcount);
dmnsn_free(texture);
} else {
--*texture->refcount;
}
}
}
/* Calculate matrix inverses */
void
dmnsn_initialize_texture(dmnsn_texture *texture)
{
texture->trans_inv = dmnsn_matrix_inverse(texture->trans);
if (texture->pigment) {
texture->pigment->trans
= dmnsn_matrix_mul(texture->trans, texture->pigment->trans);
dmnsn_initialize_pigment(texture->pigment);
}
}
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