Completed lighting, Model loading

1 files changed, 239 insertions, 0 deletions

diff --git a/include/assimp/MemoryIOWrapper.h b/include/assimp/MemoryIOWrapper.h
new file mode 100644
index 0000000..ef06af2
--- /dev/null
+++ b/include/assimp/MemoryIOWrapper.h
@@ -0,0 +1,239 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, 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 MemoryIOWrapper.h
+ *  Handy IOStream/IOSystem implementation to read directly from a memory buffer */
+#pragma once
+#ifndef AI_MEMORYIOSTREAM_H_INC
+#define AI_MEMORYIOSTREAM_H_INC
+
+#ifdef __GNUC__
+#   pragma GCC system_header
+#endif
+
+#include <assimp/IOStream.hpp>
+#include <assimp/IOSystem.hpp>
+#include <assimp/ai_assert.h>
+
+#include <stdint.h>
+
+namespace Assimp    {
+
+#define AI_MEMORYIO_MAGIC_FILENAME "$$$___magic___$$$"
+#define AI_MEMORYIO_MAGIC_FILENAME_LENGTH 17
+
+// ----------------------------------------------------------------------------------
+/** Implementation of IOStream to read directly from a memory buffer */
+// ----------------------------------------------------------------------------------
+class MemoryIOStream : public IOStream {
+public:
+    MemoryIOStream (const uint8_t* buff, size_t len, bool own = false) :
+            buffer (buff),
+            length(len),
+            pos(static_cast<size_t>(0)),
+            own(own) {
+        // empty
+    }
+
+    ~MemoryIOStream() override  {
+        if(own) {
+            delete[] buffer;
+        }
+    }
+
+    size_t Read(void* pvBuffer, size_t pSize, size_t pCount) override {
+        ai_assert(nullptr != pvBuffer);
+        ai_assert(0 != pSize);
+
+        const size_t cnt = std::min( pCount, (length-pos) / pSize);
+        const size_t ofs = pSize * cnt;
+
+        ::memcpy(pvBuffer,buffer+pos,ofs);
+        pos += ofs;
+
+        return cnt;
+    }
+
+    size_t Write(const void*, size_t, size_t ) override {
+        ai_assert(false); // won't be needed
+        return 0;
+    }
+
+    aiReturn Seek(size_t pOffset, aiOrigin pOrigin) override {
+        if (aiOrigin_SET == pOrigin) {
+            if (pOffset > length) {
+                return AI_FAILURE;
+            }
+            pos = pOffset;
+        } else if (aiOrigin_END == pOrigin) {
+            if (pOffset > length) {
+                return AI_FAILURE;
+            }
+            pos = length-pOffset;
+        } else {
+            if (pOffset+pos > length) {
+                return AI_FAILURE;
+            }
+            pos += pOffset;
+        }
+        return AI_SUCCESS;
+    }
+
+    size_t Tell() const override {
+        return pos;
+    }
+
+    size_t FileSize() const override {
+        return length;
+    }
+
+    void Flush() override{
+        ai_assert(false); // won't be needed
+    }
+
+private:
+    const uint8_t* buffer;
+    size_t length,pos;
+    bool own;
+};
+
+// ---------------------------------------------------------------------------
+/// @brief Dummy IO system to read from a memory buffer.
+class MemoryIOSystem : public IOSystem {
+public:
+    /// @brief Constructor.
+    MemoryIOSystem(const uint8_t* buff, size_t len, IOSystem* io) : buffer(buff), length(len), existing_io(io) {
+        // empty
+    }
+
+    /// @brief Destructor.
+    ~MemoryIOSystem() override = default;
+
+    // -------------------------------------------------------------------
+    /// @brief Tests for the existence of a file at the given path.
+    bool Exists(const char* pFile) const override {
+        if (0 == strncmp( pFile, AI_MEMORYIO_MAGIC_FILENAME, AI_MEMORYIO_MAGIC_FILENAME_LENGTH ) ) {
+            return true;
+        }
+        return existing_io ? existing_io->Exists(pFile) : false;
+    }
+
+    // -------------------------------------------------------------------
+    /// @brief Returns the directory separator.
+    char getOsSeparator() const override {
+        return existing_io ? existing_io->getOsSeparator()
+                           : '/';  // why not? it doesn't care
+    }
+
+    // -------------------------------------------------------------------
+    /// @brief Open a new file with a given path.
+    IOStream* Open(const char* pFile, const char* pMode = "rb") override {
+        if ( 0 == strncmp( pFile, AI_MEMORYIO_MAGIC_FILENAME, AI_MEMORYIO_MAGIC_FILENAME_LENGTH ) ) {
+            created_streams.emplace_back(new MemoryIOStream(buffer, length));
+            return created_streams.back();
+        }
+        return existing_io ? existing_io->Open(pFile, pMode) : nullptr;
+    }
+
+    // -------------------------------------------------------------------
+    /// @brief Closes the given file and releases all resources associated with it.
+    void Close( IOStream* pFile) override {
+        auto it = std::find(created_streams.begin(), created_streams.end(), pFile);
+        if (it != created_streams.end()) {
+            delete pFile;
+            created_streams.erase(it);
+        } else if (existing_io) {
+            existing_io->Close(pFile);
+        }
+    }
+
+    // -------------------------------------------------------------------
+    /// @brief Compare two paths
+    bool ComparePaths(const char* one, const char* second) const override {
+        return existing_io ? existing_io->ComparePaths(one, second) : false;
+    }
+
+    /// @brief Will push the directory.
+    bool PushDirectory( const std::string &path ) override {
+        return existing_io ? existing_io->PushDirectory(path) : false;
+    }
+
+    /// @brief Will return the current directory from the stack top.
+    const std::string &CurrentDirectory() const override {
+        static std::string empty;
+        return existing_io ? existing_io->CurrentDirectory() : empty;
+    }
+
+    /// @brief Returns the stack size.
+    size_t StackSize() const override {
+        return existing_io ? existing_io->StackSize() : 0;
+    }
+
+    /// @brief Will pop the upper directory.
+    bool PopDirectory() override {
+        return existing_io ? existing_io->PopDirectory() : false;
+    }
+
+    /// @brief Will create the directory.
+    bool CreateDirectory( const std::string &path ) override {
+        return existing_io ? existing_io->CreateDirectory(path) : false;
+    }
+
+    /// @brief Will change the directory.
+    bool ChangeDirectory( const std::string &path ) override {
+        return existing_io ? existing_io->ChangeDirectory(path) : false;
+    }
+
+    /// @brief Will delete the file.
+    bool DeleteFile( const std::string &file ) override {
+        return existing_io ? existing_io->DeleteFile(file) : false;
+    }
+
+private:
+    const uint8_t* buffer;
+    size_t length;
+    IOSystem* existing_io;
+    std::vector<IOStream*> created_streams;
+};
+
+} // end namespace Assimp
+
+#endif // AI_MEMORYIOSTREAM_H_INC