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109 lines
3.1 KiB
109 lines
3.1 KiB
/* |
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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This file is part of Magnum. |
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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#include "TgaImporter.h" |
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#include <Utility/Endianness.h> |
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#include "Math/Vector2.h" |
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#include "Trade/ImageData.h" |
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using namespace std; |
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using namespace Corrade::Utility; |
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namespace Magnum { namespace Trade { namespace TgaImporter { |
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#ifndef DOXYGEN_GENERATING_OUTPUT |
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static_assert(sizeof(TgaImporter::Header) == 18, "TgaImporter: header size is not 18 bytes"); |
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#endif |
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bool TgaImporter::TgaImporter::open(const string& filename, const string& name) { |
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ifstream in(filename.c_str()); |
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if(!in.good()) { |
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Error() << "TgaImporter: cannot open file" << filename; |
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return false; |
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} |
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bool status = open(in, name); |
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in.close(); |
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return status; |
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} |
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bool TgaImporter::open(istream& in, const string& name) { |
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if(_image) close(); |
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if(!in.good()) { |
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Error() << "TgaImporter: cannot read input stream"; |
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return false; |
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} |
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/* Check if the file is long enough */ |
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in.seekg(0, istream::end); |
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streampos filesize = in.tellg(); |
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in.seekg(0, istream::beg); |
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if(filesize < streampos(sizeof(Header))) { |
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Error() << "TgaImporter: the file is too short:" << filesize << "bytes"; |
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return false; |
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} |
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Header header; |
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in.read(reinterpret_cast<char*>(&header), sizeof(Header)); |
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/* Convert to machine endian */ |
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header.width = Endianness::littleEndian<unsigned short>(header.width); |
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header.height = Endianness::littleEndian<unsigned short>(header.height); |
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if(header.colorMapType != 0) { |
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Error() << "TgaImporter: paletted files are not supported"; |
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return false; |
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} |
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if(header.imageType != 2) { |
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Error() << "TgaImporter: non-RGB files are not supported"; |
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return false; |
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} |
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AbstractImage::Components components; |
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switch(header.bpp) { |
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case 24: |
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components = AbstractImage::Components::BGR; |
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break; |
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case 32: |
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components = AbstractImage::Components::BGRA; |
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break; |
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default: |
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Error() << "TgaImporter: unsupported bits-per-pixel:" << int(header.bpp); |
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return false; |
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} |
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size_t size = header.width*header.height*header.bpp/8; |
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GLubyte* buffer = new GLubyte[size]; |
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in.read(reinterpret_cast<char*>(buffer), size); |
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Math::Vector2<GLsizei> dimensions(header.width, header.height); |
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_image = new ImageData2D(name, dimensions, components, buffer); |
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return true; |
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} |
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void TgaImporter::close() { |
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/** @todo fixme: delete it only if it wasn't retrieved by user */ |
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//delete _image; |
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_image = nullptr; |
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} |
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ImageData2D* TgaImporter::image2D(unsigned int) { |
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return _image; |
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} |
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}}}
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