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/* Copyright (C) 2009 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "XMLFix.h"
#include "CommonConvert.h"
#include "FUtils/FUXmlParser.h"
/*
Things that are fixed here:
----
3ds Max "file://" image URLs
Identifier: /COLLADA/asset/contributor/authoring_tool = "FBX COLLADA exporter"
Problem: /COLLADA/library_images/image/init_from = "file://" which crashes some versions of FCollada
Fix: Delete the whole library_images subtree, since we never use it anyway.
Then delete library_effects and library_materials too, to avoid broken references.
----
3ds Max broken material references
Identifier: /COLLADA/asset/contributor/authoring_tool = "FBX COLLADA exporter"
Problem: /COLLADA/library_visual_scenes/.../instance_material/@target sometimes
refers to non-existent material IDs.
Fix: Delete the whole bind_material subtree, since we never use it anyway.
----
*/
static xmlNode* findChildElement(xmlNode* node, const char* name)
{
for (xmlNode* child = node->children; child; child = child->next)
{
if (child->type == XML_ELEMENT_NODE && strcmp((const char*)child->name, name) == 0)
return child;
}
return NULL;
}
static bool applyFBXFixesNode(xmlNode* node)
{
bool changed = false;
for (xmlNode* child = node->children; child; child = child->next)
{
if (child->type == XML_ELEMENT_NODE)
{
if (strcmp((const char*)child->name, "node") == 0)
{
if (applyFBXFixesNode(child))
changed = true;
}
else if (strcmp((const char*)child->name, "instance_geometry") == 0)
{
xmlNode* bind_material = findChildElement(child, "bind_material");
if (! bind_material) continue;
Log(LOG_INFO, "Found a bind_material to delete");
xmlUnlinkNode(bind_material);
xmlFreeNode(bind_material);
changed = true;
}
}
}
return changed;
}
static bool applyFBXFixes(xmlNode* root)
{
Log(LOG_INFO, "Applying fixes for 3ds Max exporter");
bool changed = false;
xmlNode* library_images = findChildElement(root, "library_images");
if (library_images)
{
Log(LOG_INFO, "Found library_images to delete");
xmlUnlinkNode(library_images);
xmlFreeNode(library_images);
changed = true;
}
xmlNode* library_materials = findChildElement(root, "library_materials");
if (library_materials)
{
Log(LOG_INFO, "Found library_materials to delete");
xmlUnlinkNode(library_materials);
xmlFreeNode(library_materials);
changed = true;
}
xmlNode* library_effects = findChildElement(root, "library_effects");
if (library_effects)
{
Log(LOG_INFO, "Found library_effects to delete");
xmlUnlinkNode(library_effects);
xmlFreeNode(library_effects);
changed = true;
}
xmlNode* library_visual_scenes = findChildElement(root, "library_visual_scenes");
if (library_visual_scenes) // (Assume there's only one of these)
{
xmlNode* visual_scene = findChildElement(library_visual_scenes, "visual_scene");
if (visual_scene) // (Assume there's only one of these)
{
for (xmlNode* child = visual_scene->children; child; child = child->next)
{
if (child->type == XML_ELEMENT_NODE && strcmp((const char*)child->name, "node") == 0)
if (applyFBXFixesNode(child))
changed = true;
}
}
}
return changed;
}
static bool processDocument(xmlNode* root)
{
xmlNode* asset = findChildElement(root, "asset");
if (! asset) return false;
xmlNode* contributor = findChildElement(asset, "contributor");
if (! contributor) return false;
xmlNode* authoring_tool = findChildElement(contributor, "authoring_tool");
if (! authoring_tool) return false;
xmlNode* authoring_tool_text = authoring_tool->children;
if (! authoring_tool_text) return false;
if (authoring_tool_text->type != XML_TEXT_NODE) return false;
xmlChar* toolname = authoring_tool_text->content;
Log(LOG_INFO, "Authoring tool: %s", toolname);
if (strcmp((const char*)toolname, "FBX COLLADA exporter") == 0)
return applyFBXFixes(root);
else
return false;
}
void FixBrokenXML(const char* text, const char** out, size_t* outSize)
{
Log(LOG_INFO, "Running FixBrokenXML");
size_t textSize = strlen(text);
xmlDocPtr doc = xmlParseMemory(text, (int)textSize);
xmlNode* root = xmlDocGetRootElement(doc);
if (root && processDocument(root))
{
// Reserialising the document, then parsing it again inside FCollada, is a bit ugly;
// but it's the only way I can see to make it work through FCollada's public API
xmlChar* mem = NULL;
int size = -1;
xmlDocDumpFormatMemory(doc, &mem, &size, 0);
*out = (const char*)mem;
*outSize = size;
}
else
{
*out = text;
*outSize = textSize;
}
xmlFreeDoc(doc);
}
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