mirror of
https://github.com/love2d/love.git
synced 2026-08-16 16:20:42 +02:00
Alex Szpakowski
130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
/**
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* Copyright (c) 2006-2014 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "ddsHandler.h"
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namespace love
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{
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namespace image
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{
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namespace magpie
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{
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bool ddsHandler::canParse(const filesystem::FileData *data)
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{
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return dds::isCompressedDDS(data->getData(), data->getSize());
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}
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uint8 *ddsHandler::parse(filesystem::FileData *filedata, std::vector<CompressedData::SubImage> &images, size_t &dataSize, CompressedData::Format &format)
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{
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if (!dds::isDDS(filedata->getData(), filedata->getSize()))
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throw love::Exception("Could not decode compressed data (not a DDS file?)");
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CompressedData::Format texformat = CompressedData::FORMAT_UNKNOWN;
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uint8 *data = 0;
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dataSize = 0;
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images.clear();
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try
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{
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// Attempt to parse the dds file.
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dds::Parser parser(filedata->getData(), filedata->getSize());
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texformat = convertFormat(parser.getFormat());
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if (texformat == CompressedData::FORMAT_UNKNOWN)
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throw love::Exception("Could not parse compressed data: Unsupported format.");
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if (parser.getMipmapCount() == 0)
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throw love::Exception("Could not parse compressed data: No readable texture data.");
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// Calculate the size of the block of memory we're returning.
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for (size_t i = 0; i < parser.getMipmapCount(); i++)
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{
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const dds::Image *img = parser.getImageData(i);
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dataSize += img->dataSize;
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}
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data = new uint8[dataSize];
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size_t dataOffset = 0;
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// Copy the parsed mipmap levels from the FileData to our CompressedData.
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for (size_t i = 0; i < parser.getMipmapCount(); i++)
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{
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// Fetch the data for this mipmap level.
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const dds::Image *img = parser.getImageData(i);
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CompressedData::SubImage mip;
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mip.width = img->width;
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mip.height = img->height;
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mip.size = img->dataSize;
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// Copy the mipmap image from the FileData to our block of memory.
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memcpy(data + dataOffset, img->data, mip.size);
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mip.data = data + dataOffset;
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dataOffset += mip.size;
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images.push_back(mip);
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}
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}
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catch (std::exception &e)
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{
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delete[] data;
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images.clear();
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throw love::Exception("%s", e.what());
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}
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format = texformat;
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return data;
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}
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CompressedData::Format ddsHandler::convertFormat(dds::Format ddsformat)
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{
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switch (ddsformat)
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{
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case dds::FORMAT_DXT1:
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return CompressedData::FORMAT_DXT1;
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case dds::FORMAT_DXT3:
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return CompressedData::FORMAT_DXT3;
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case dds::FORMAT_DXT5:
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return CompressedData::FORMAT_DXT5;
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case dds::FORMAT_BC4:
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return CompressedData::FORMAT_BC4;
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case dds::FORMAT_BC4s:
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return CompressedData::FORMAT_BC4s;
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case dds::FORMAT_BC5:
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return CompressedData::FORMAT_BC5;
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case dds::FORMAT_BC5s:
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return CompressedData::FORMAT_BC5s;
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default:
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return CompressedData::FORMAT_UNKNOWN;
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}
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return CompressedData::FORMAT_UNKNOWN;
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}
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} // magpie
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} // image
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} // love
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