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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This 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 2.1 of the License, or (at your option) any later version.
This 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 library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <g3d/types.h>
#include <g3d/stream.h>
#include <g3d/material.h>
#include <g3d/texture.h>
#include <g3d/matrix.h>
#include "imp_3ds.h"
#include "imp_3ds_chunks.h"
/*****************************************************************************/
/* plugin interface */
/*****************************************************************************/
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model, gpointer plugin_data)
{
G3DMatrix rmatrix[16];
gint32 nbytes, magic;
gboolean retval;
x3ds_global_data global;
x3ds_parent_data *parent;
magic = g3d_stream_read_int16_le(stream);
if((magic != 0x4D4D) && (magic != 0xC23D))
{
g_warning("file %s is not a 3ds file", stream->uri);
return FALSE;
}
nbytes = g3d_stream_read_int32_le(stream);
nbytes -= 6;
#if DEBUG > 0
g_debug("\\[%4.4X] 3DS file: main length: %d", magic, nbytes);
#endif
global.context = context;
global.model = model;
global.stream = stream;
global.scale = 1.0;
global.max_tex_id = 0;
parent = g_new0(x3ds_parent_data, 1);
parent->id = magic;
parent->nb = nbytes;
retval = x3ds_read_ctnr(&global, parent);
g3d_matrix_identity(rmatrix);
g3d_matrix_rotate_xyz(G_PI * -90.0 / 180, 0.0, 0.0, rmatrix);
g3d_model_transform(model, rmatrix);
g_free(parent);
return retval;
}
EAPI
gchar *plugin_description(void)
{
return g_strdup("AutoCAD 3D Studio models.");
}
EAPI
gchar **plugin_extensions(void)
{
return g_strsplit("3ds:prj", ":", 0);
}
/*****************************************************************************/
gboolean x3ds_read_ctnr(x3ds_global_data *global, x3ds_parent_data *parent)
{
gint32 chunk_id, chunk_len, i;
x3ds_parent_data *subparent;
gpointer level_object;
gchar *padding = " ";
level_object = NULL;
while(parent->nb > 0) {
chunk_id = g3d_stream_read_int16_le(global->stream);
chunk_len = g3d_stream_read_int32_le(global->stream);
parent->nb -= 6;
chunk_len -= 6;
i = 0;
while((x3ds_chunks[i].id != 0) && (x3ds_chunks[i].id != chunk_id))
i ++;
if(x3ds_chunks[i].id == chunk_id) {
g_debug("\\%s(%d)[0x%04X][%c%c] %s (%d bytes)",
padding + (strlen(padding) - parent->level), parent->level,
chunk_id,
x3ds_chunks[i].container ? 'c' : ' ',
x3ds_chunks[i].callback ? 'f' : ' ',
x3ds_chunks[i].desc, chunk_len);
if (chunk_id==0) {
g_warning("error: bad chunk id");
return FALSE;
}
subparent = g_new0(x3ds_parent_data, 1);
subparent->id = parent->id;
subparent->object = parent->object;
subparent->level = parent->level + 1;
subparent->level_object = level_object;
subparent->nb = chunk_len;
if(x3ds_chunks[i].callback) {
/* callback may change "nb" and "object" of
* "subparent" structure for following container run */
x3ds_chunks[i].callback(global, subparent);
}
subparent->id = chunk_id;
if(x3ds_chunks[i].container) {
if(x3ds_read_ctnr(global, subparent) == FALSE) {
/* abort on error */
return FALSE;
}
}
if(subparent->nb)
g3d_stream_skip(global->stream, subparent->nb);
level_object = subparent->level_object;
g_free(subparent);
} else {
g_warning("[3DS] unknown chunk type 0x%04X", chunk_id);
g3d_stream_skip(global->stream, chunk_len);
}
parent->nb -= chunk_len;
/* update progress bar */
x3ds_update_progress(global, parent->level);
}
return TRUE;
}
void x3ds_update_progress(x3ds_global_data *global, guint32 level)
{
goffset fpos;
/* update progress bar */
if(level < 4) {
fpos = g3d_stream_tell(global->stream);
g3d_context_update_progress_bar(global->context,
((G3DFloat)fpos / (G3DFloat)g3d_stream_size(global->stream)), TRUE);
}
}
gint32 x3ds_read_cstr(G3DStream *stream, gchar *string)
{
gint32 n = 0;
char c;
do {
c = g3d_stream_read_int8(stream);
string[n] = c;
n++;
} while(c != 0);
return n;
}
G3DObject *x3ds_newobject(G3DModel *model, const gchar *name)
{
G3DObject *object = g_malloc0(sizeof(G3DObject));
G3DMaterial *material = g3d_material_new();
object->name = g_strdup(name);
object->faces = NULL;
model->objects = g_slist_append(model->objects, object);
object->materials = g_slist_append(object->materials, material);
return object;
}
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