Upgrade to Assimp 3.1

https://github.com/assimp/assimp/releases/tag/v3.1

This commit imports assimp 3.1, including CHANGES, CREDITS, LICENSE, README,
Readme.md, revision.h and code, contrib, include directories. contrib/zlib
was excluded.
assimp.pri was also updated.
Uses zlib from system or qt instead of contrib/zlib.

Task-number: QTBUG-39251
Change-Id: Ia0b446dcd9bc867d65897b9e2b157f6544ccaeac
Reviewed-by: Liang Qi <liang.qi@digia.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 145 insertions, 0 deletions

diff --git a/src/3rdparty/assimp/code/Bitmap.cpp b/src/3rdparty/assimp/code/Bitmap.cpp
new file mode 100644
index 000000000..30b5744ad
--- /dev/null
+++ b/src/3rdparty/assimp/code/Bitmap.cpp
@@ -0,0 +1,145 @@
+/*
+---------------------------------------------------------------------------
+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 Bitmap.cpp
+ *  @brief Defines bitmap format helper for textures
+ *
+ * Used for file formats which embed their textures into the model file.
+ */
+
+#include "AssimpPCH.h"
+
+#include "Bitmap.h"
+
+namespace Assimp {
+
+	void Bitmap::Save(aiTexture* texture, IOStream* file) {
+		if(file != NULL) {
+			Header header;
+			DIB dib;
+
+			dib.size = DIB::dib_size;
+			dib.width = texture->mWidth;
+			dib.height = texture->mHeight;
+			dib.planes = 1;
+			dib.bits_per_pixel = 8 * mBytesPerPixel;
+			dib.compression = 0;
+			dib.image_size = (((dib.width * mBytesPerPixel) + 3) & 0x0000FFFC) * dib.height;
+			dib.x_resolution = 0;
+			dib.y_resolution = 0;
+			dib.nb_colors = 0;
+			dib.nb_important_colors = 0;
+
+			header.type = 0x4D42; // 'BM'
+			header.offset = Header::header_size + DIB::dib_size;
+			header.size = header.offset + dib.image_size;
+			header.reserved1 = 0;
+			header.reserved2 = 0;
+
+			WriteHeader(header, file);
+			WriteDIB(dib, file);
+			WriteData(texture, file);
+		}
+	}
+
+	template<typename T>
+	inline std::size_t Copy(uint8_t* data, T& field) {
+		std::memcpy(data, &AI_BE(field), sizeof(field)); return sizeof(field);
+	}
+
+	void Bitmap::WriteHeader(Header& header, IOStream* file) {
+		uint8_t data[Header::header_size];
+
+		std::size_t offset = 0;
+
+		offset += Copy(&data[offset], header.type);
+		offset += Copy(&data[offset], header.size);
+		offset += Copy(&data[offset], header.reserved1);
+		offset += Copy(&data[offset], header.reserved2);
+		offset += Copy(&data[offset], header.offset);
+
+		file->Write(data, Header::header_size, 1);
+	}
+
+	void Bitmap::WriteDIB(DIB& dib, IOStream* file) {
+		uint8_t data[DIB::dib_size];
+
+		std::size_t offset = 0;
+
+		offset += Copy(&data[offset], dib.size);
+		offset += Copy(&data[offset], dib.width);
+		offset += Copy(&data[offset], dib.height);
+		offset += Copy(&data[offset], dib.planes);
+		offset += Copy(&data[offset], dib.bits_per_pixel);
+		offset += Copy(&data[offset], dib.compression);
+		offset += Copy(&data[offset], dib.image_size);
+		offset += Copy(&data[offset], dib.x_resolution);
+		offset += Copy(&data[offset], dib.y_resolution);
+		offset += Copy(&data[offset], dib.nb_colors);
+		offset += Copy(&data[offset], dib.nb_important_colors);
+
+		file->Write(data, DIB::dib_size, 1);
+	}
+
+	void Bitmap::WriteData(aiTexture* texture, IOStream* file) {
+		static const std::size_t padding_offset = 4;
+		static const uint8_t padding_data[padding_offset] = {0x0, 0x0, 0x0, 0x0};
+
+		unsigned int padding = (padding_offset - ((mBytesPerPixel * texture->mWidth) % padding_offset)) % padding_offset;
+		uint8_t pixel[mBytesPerPixel];
+
+		for(std::size_t i = 0; i < texture->mHeight; ++i) {
+			for(std::size_t j = 0; j < texture->mWidth; ++j) {
+				const aiTexel& texel = texture->pcData[(texture->mHeight - i - 1) * texture->mWidth + j]; // Bitmap files are stored in bottom-up format
+
+				pixel[0] = texel.r;
+				pixel[1] = texel.g;
+				pixel[2] = texel.b;
+				pixel[3] = texel.a;
+
+				file->Write(pixel, mBytesPerPixel, 1);
+			}
+
+			file->Write(padding_data, padding, 1);
+		}
+	}
+
+}