Re-add libassimp 3.1.1 to 3rd party

Previously the assimp library was a dependency that was
always built, but it is possible to use an external
system version if one is available.  It is however non-
trivial to provide the dependency on platforms other
than Linux, so now we provide a copy of libassimp for
use when it is not already available.

This commit is a combination of reverting commit
672b3e47299f6ba0034f73b252d0436b55fb3085 which removed
assimp and introduced the scene parser, and adding the
logic to use the system version when available.

Change-Id: Ia05f9a92b8d82f19a0db3588b2bbeafe71404386
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 247 insertions, 0 deletions

diff --git a/src/3rdparty/assimp/include/assimp/metadata.h b/src/3rdparty/assimp/include/assimp/metadata.h
new file mode 100644
index 000000000..16809a511
--- /dev/null
+++ b/src/3rdparty/assimp/include/assimp/metadata.h
@@ -0,0 +1,247 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2012, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, 
+with or without modification, are permitted provided that the following 
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file metadata.h
+ *  @brief Defines the data structures for holding node meta information.
+ */
+#ifndef __AI_METADATA_H_INC__
+#define __AI_METADATA_H_INC__
+
+#include <assert.h>
+
+#if defined(_MSC_VER) && (_MSC_VER <= 1500)
+#include "Compiler/pstdint.h"
+#else
+#include <stdint.h>
+#endif
+
+
+
+// -------------------------------------------------------------------------------
+/**
+  * Enum used to distinguish data types
+  */
+ // -------------------------------------------------------------------------------
+typedef enum aiMetadataType
+{
+	AI_BOOL = 0, 
+	AI_INT = 1, 
+	AI_UINT64 = 2, 
+	AI_FLOAT = 3, 
+	AI_AISTRING = 4,
+	AI_AIVECTOR3D = 5,
+
+#ifndef SWIG
+	FORCE_32BIT = INT_MAX
+#endif
+} aiMetadataType;
+
+
+
+// -------------------------------------------------------------------------------
+/**
+  * Metadata entry
+  *
+  * The type field uniquely identifies the underlying type of the data field
+  */
+ // -------------------------------------------------------------------------------
+struct aiMetadataEntry
+{
+	aiMetadataType mType;
+	void* mData;
+};
+
+
+
+#ifdef __cplusplus
+
+#include <string>
+
+
+
+// -------------------------------------------------------------------------------
+/**
+  * Helper functions to get the aiType enum entry for a type
+  */
+ // -------------------------------------------------------------------------------
+inline aiMetadataType GetAiType( bool ) { return AI_BOOL; }
+inline aiMetadataType GetAiType( int ) { return AI_INT; }
+inline aiMetadataType GetAiType( uint64_t ) { return AI_UINT64; }
+inline aiMetadataType GetAiType( float ) { return AI_FLOAT; }
+inline aiMetadataType GetAiType( aiString ) { return AI_AISTRING; }
+inline aiMetadataType GetAiType( aiVector3D ) { return AI_AIVECTOR3D; }
+
+
+
+#endif
+
+
+
+// -------------------------------------------------------------------------------
+/**
+  * Container for holding metadata.
+  *
+  * Metadata is a key-value store using string keys and values.
+  */
+ // -------------------------------------------------------------------------------
+struct aiMetadata 
+{
+	/** Length of the mKeys and mValues arrays, respectively */
+	unsigned int mNumProperties;
+
+	/** Arrays of keys, may not be NULL. Entries in this array may not be NULL as well. */
+	C_STRUCT aiString* mKeys;
+
+	/** Arrays of values, may not be NULL. Entries in this array may be NULL if the
+	  * corresponding property key has no assigned value. */
+	C_STRUCT aiMetadataEntry* mValues;
+
+#ifdef __cplusplus
+
+	/** Constructor */
+	aiMetadata()
+		// set all members to zero by default
+		: mNumProperties(0)
+		, mKeys(NULL)
+		, mValues(NULL)
+	{}
+
+
+	/** Destructor */
+	~aiMetadata()
+	{
+        delete[] mKeys;
+        mKeys = NULL;
+		if (mValues)
+		{
+			// Delete each metadata entry
+			for (unsigned i=0; i<mNumProperties; ++i)
+			{
+				void* data = mValues[i].mData;
+				switch (mValues[i].mType) 
+				{
+				case AI_BOOL:
+					delete static_cast<bool*>(data);
+					break;
+				case AI_INT:
+					delete static_cast<int*>(data);
+					break;
+				case AI_UINT64:
+					delete static_cast<uint64_t*>(data);
+					break;
+				case AI_FLOAT:
+					delete static_cast<float*>(data);
+					break;
+				case AI_AISTRING:
+					delete static_cast<aiString*>(data);
+					break;
+				case AI_AIVECTOR3D:
+					delete static_cast<aiVector3D*>(data);
+					break;
+				default:
+					assert(false);
+					break;
+				}
+			}
+
+			// Delete the metadata array
+			delete [] mValues;
+            mValues = NULL;
+		}
+	}
+
+
+
+	template<typename T>
+	inline void Set( unsigned index, const std::string& key, const T& value )
+	{
+		// In range assertion
+		assert(index < mNumProperties);
+
+		// Set metadata key
+		mKeys[index] = key;
+
+		// Set metadata type
+		mValues[index].mType = GetAiType(value);
+		// Copy the given value to the dynamic storage
+		mValues[index].mData = new T(value);
+	}
+
+	template<typename T>
+	inline bool Get( unsigned index, T& value )
+	{
+		// In range assertion
+		assert(index < mNumProperties);
+
+		// Return false if the output data type does 
+		// not match the found value's data type
+        if ( GetAiType( value ) != mValues[ index ].mType ) {
+            return false;
+        }
+
+		// Otherwise, output the found value and 
+		// return true
+		value = *static_cast<T*>(mValues[index].mData);
+		return true;
+	}
+
+	template<typename T>
+	inline bool Get( const aiString& key, T& value )
+	{
+		// Search for the given key
+		for (unsigned i=0; i<mNumProperties; ++i)
+			if (mKeys[i]==key)
+				return Get(i, value);
+		return false;
+	}
+
+	template<typename T>
+	inline bool Get( const std::string& key, T& value ) {
+        return Get(aiString(key), value); 
+    }
+
+#endif // __cplusplus
+
+};
+
+#endif // __AI_METADATA_H_INC__
+
+