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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 <string.h>
#include <g3d/types.h>
#include <g3d/stream.h>
#include <g3d/debug.h>
static gboolean c4d_load_v5(G3DContext *context, G3DStream *stream,
G3DModel *model);
static gboolean c4d_load_v6(G3DContext *context, G3DStream *stream,
G3DModel *model);
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model, gpointer user_data)
{
gchar magic[5];
g3d_stream_read(stream, magic, 4);
magic[4] = '\0';
if(strncmp(magic + 1, "C4D", 3) == 0) {
g3d_stream_read(stream, magic, 4);
if(strncmp(magic, "C4D6", 4) == 0)
return c4d_load_v6(context, stream, model);
else {
g_warning("unknown C4D magic: %s", magic);
return FALSE;
}
} else if(strncmp(magic + 1, "C50", 3) == 0) {
g_debug("C4D v5: %s", magic);
return c4d_load_v5(context, stream, model);
} else {
g_warning("C4D: unknown magic %s, not a C4D file?", magic);
return FALSE;
}
return TRUE;
}
EAPI
gchar *plugin_description(void)
{
return g_strdup("Cinema4D models.");
}
EAPI
gchar **plugin_extensions(void)
{
return g_strsplit("c4d", ":", 0);
}
/*****************************************************************************/
static gchar *c4d_read_wchar(G3DStream *stream, gsize *n_bytes)
{
guint32 len;
gunichar2 *u16text;
gchar *text;
gint32 i;
GError *error = NULL;
len = g3d_stream_read_int32_be(stream);
*n_bytes += 4 + len;
u16text = g_new0(gunichar2, len + 1);
for(i = 0; i < len / 2; i ++)
u16text[i] = g3d_stream_read_int16_be(stream);
text = g_utf16_to_utf8(u16text, len, NULL, NULL, &error);
if(error != NULL) {
g_warning("UTF-16 to UTF-8 conversion failed: %s", error->message);
g_error_free(error);
}
g_free(u16text);
return text;
}
#define C4D_DEBUG_OPCODE 0
static gboolean c4d_handle_opcode(guint8 opcode, G3DStream *stream,
G3DModel *model, gsize *n_bytes, guint32 *level)
{
guint8 u1, *data;
guint16 w1, w2, w3;
guint32 x1, x3;
gsize x2;
G3DFloat f1, f2, f3;
gchar *str;
gint32 i;
switch(opcode) {
case 0x01: /* 64 bit something */
*level += 1;
x1 = g3d_stream_read_int32_be(stream);
x2 = g3d_stream_read_int32_be(stream);
*n_bytes += 8;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s01: 0x%08x 0x%08x", debug_pad(*level), x1, x2);
#endif
break;
case 0x02: /* no payload */
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s02", debug_pad(*level));
#endif
if(*level == 0) {
g_warning("E: 02: level == 0)");
} else
*level -= 1;
break;
case 0x0C: /* 8 bit something */
u1 = g3d_stream_read_int8(stream);
*n_bytes += 1;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s0C: 0x%02x", debug_pad(*level), u1);
#endif
break;
case 0x0F: /* 32 bit something */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s0F: 0x%08x", debug_pad(*level), x1);
#endif
break;
case 0x10: /* 32 bit something */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s10: 0x%08x", debug_pad(*level), x1);
#endif
break;
case 0x13: /* float */
f1 = g3d_stream_read_float_be(stream);
*n_bytes += 4;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s13: %.3f", debug_pad(*level), f1);
#endif
break;
case 0x15: /* 8 bit something */
u1 = g3d_stream_read_int8(stream);
*n_bytes += 1;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s15: 0x%02x", debug_pad(*level), u1);
#endif
break;
case 0x16: /* 2 x float */
f1 = g3d_stream_read_float_be(stream);
f2 = g3d_stream_read_float_be(stream);
*n_bytes += 8;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s16: %.3f, %.3f", debug_pad(*level), f1, f2);
#endif
break;
case 0x17: /* 3 x float */
f1 = g3d_stream_read_float_be(stream);
f2 = g3d_stream_read_float_be(stream);
f3 = g3d_stream_read_float_be(stream);
*n_bytes += 12;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s17: %.3f, %.3f, %.3f", debug_pad(*level), f1, f2, f3);
#endif
break;
case 0x19: /* 12 x float */
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s19:", debug_pad(*level));
#endif
for(i = 0; i < 4; i ++) {
f1 = g3d_stream_read_float_be(stream);
f2 = g3d_stream_read_float_be(stream);
f3 = g3d_stream_read_float_be(stream);
*n_bytes += 12;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s %.3f, %.3f, %.3f", debug_pad(*level),
f1, f2, f3);
#endif
}
break;
case 0x80: /* data */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4 + x1;
data = g_new0(guint8, x1);
g3d_stream_read(stream, data, x1);
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s80: %d bytes of data", debug_pad(*level), x1);
#endif
g_free(data);
break;
case 0x81: /* embedded file */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
g3d_stream_skip(stream, x1);
*n_bytes += x1;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s81: skipped %d bytes", debug_pad(*level), x1);
#endif
break;
case 0x82: /* wide-char string */
str = c4d_read_wchar(stream, n_bytes);
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s82: %s", debug_pad(*level), str);
#endif
if(str)
g_free(str);
break;
case 0x83: /* file name */
str = c4d_read_wchar(stream, n_bytes);
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s83: %s", debug_pad(*level), str);
#endif
if(str)
g_free(str);
break;
case 0x84: /* typed content */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
x2 = 0;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s84: 0x%08x", debug_pad(*level), x1);
#endif
*level += 1;
while(x2 < x1) {
u1 = g3d_stream_read_int8(stream);
x2 ++;
if(!c4d_handle_opcode(u1, stream, model, &x2, level))
return FALSE;
x3 = g3d_stream_read_int32_be(stream);
x2 += 4;
u1 = g3d_stream_read_int8(stream);
x2 += 1;
}
*level -= 1;
*n_bytes += x1;
break;
case 0x85: /* n * 3 * float */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s85:", debug_pad(*level));
#endif
for(i = 0; i < (x1 / 12); i ++) {
f1 = g3d_stream_read_float_be(stream);
f2 = g3d_stream_read_float_be(stream);
f3 = g3d_stream_read_float_be(stream);
*n_bytes += 12;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s %.3f, %.3f, %.3f", debug_pad(*level),
f1, f2, f3);
#endif
}
break;
case 0x86: /* n * int16 */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s86:", debug_pad(*level));
#endif
for(i = 0; i < (x1 / 2); i ++) {
w1 = g3d_stream_read_int16_be(stream);
*n_bytes += 2;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s 0x%04x", debug_pad(*level), w1);
#endif
}
break;
case 0x87: /* n * 3 * int16 */
x1 = g3d_stream_read_int32_be(stream);
*n_bytes += 4;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s87:", debug_pad(*level));
#endif
for(i = 0; i < (x1 / 6); i ++) {
w1 = g3d_stream_read_int16_be(stream);
w2 = g3d_stream_read_int16_be(stream);
w3 = g3d_stream_read_int16_be(stream);
*n_bytes += 6;
#if DEBUG > C4D_DEBUG_OPCODE
g_debug("\\%s 0x%04x 0x%04x 0x%04x", debug_pad(*level),
w1, w2, w3);
#endif
}
break;
default:
if(g3d_stream_eof(stream))
return TRUE;
#if DEBUG > 0
g_debug("%sunknown opcode 0x%02X @ 0x%08x", debug_pad(*level),
opcode, (guint32)g3d_stream_tell(stream));
#endif
return FALSE;
}
return TRUE;
}
static gboolean c4d_read_v5_cntr(G3DContext *context, G3DStream *stream,
G3DModel *model, goffset *n_bytes, guint32 level)
{
guint32 id;
goffset size;
while(!g3d_stream_eof(stream) && (*n_bytes > 0)) {
id = g3d_stream_read_int32_be(stream);
size = g3d_stream_read_int32_be(stream);
*n_bytes -= 8;
if(*n_bytes < 0)
return FALSE;
#if DEBUG > 0
g_debug("\\%s0x%08x @ 0x%08x (%u bytes)", debug_pad(level), id,
(guint32)g3d_stream_tell(stream), (guint32)size);
#endif
*n_bytes -= size;
if((id == 0x00001647) || (id == 0x0000139c)) {
if(!c4d_read_v5_cntr(context, stream, model, &size, level + 1))
return FALSE;
} else {
g3d_stream_skip(stream, size);
}
}
return TRUE;
}
static gboolean c4d_load_v5(G3DContext *context, G3DStream *stream,
G3DModel *model)
{
goffset n_bytes;
n_bytes = g3d_stream_read_int32_be(stream); /* file size */
g3d_stream_read_int32_be(stream); /* DOK5 */
g3d_stream_read_int32_be(stream); /* unknown 1 */
return c4d_read_v5_cntr(context, stream, model, &n_bytes, 0);
}
static gboolean c4d_load_v6(G3DContext *context, G3DStream *stream,
G3DModel *model)
{
guint8 opcode;
gsize n_bytes = 0;
guint32 level = 0;
while(!g3d_stream_eof(stream)) {
opcode = g3d_stream_read_int8(stream);
if(!c4d_handle_opcode(opcode, stream, model, &n_bytes, &level))
return FALSE;
}
return TRUE;
}
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