mirror of
https://github.com/love2d/love.git
synced 2026-08-17 11:00:31 +02:00
Alex Szpakowski
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/**
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* Copyright (c) 2006-2017 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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StrongRef<CompressedMemory> DDSHandler::parse(filesystem::FileData *filedata, std::vector<StrongRef<CompressedSlice>> &images, PixelFormat &format, bool &sRGB)
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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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PixelFormat texformat = PIXELFORMAT_UNKNOWN;
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bool isSRGB = false;
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StrongRef<CompressedMemory> memory;
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size_t dataSize = 0;
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images.clear();
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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(), isSRGB);
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if (texformat == PIXELFORMAT_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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memory.set(new CompressedMemory(dataSize), Acquire::NORETAIN);
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size_t dataOffset = 0;
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// Copy the parsed mipmap levels from the FileData to our CompressedImageData.
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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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// Copy the mipmap image from the FileData to our block of memory.
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memcpy(memory->data + dataOffset, img->data, img->dataSize);
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auto slice = new CompressedSlice(texformat, img->width, img->height, memory, dataOffset, img->dataSize);
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images.emplace_back(slice, Acquire::NORETAIN);
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dataOffset += img->dataSize;
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}
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format = texformat;
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sRGB = isSRGB;
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return memory;
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}
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PixelFormat DDSHandler::convertFormat(dds::Format ddsformat, bool &sRGB)
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{
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sRGB = false;
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switch (ddsformat)
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{
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case dds::FORMAT_DXT1:
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return PIXELFORMAT_DXT1;
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case dds::FORMAT_DXT3:
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return PIXELFORMAT_DXT3;
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case dds::FORMAT_DXT5:
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return PIXELFORMAT_DXT5;
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case dds::FORMAT_BC4:
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return PIXELFORMAT_BC4;
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case dds::FORMAT_BC4s:
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return PIXELFORMAT_BC4s;
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case dds::FORMAT_BC5:
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return PIXELFORMAT_BC5;
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case dds::FORMAT_BC5s:
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return PIXELFORMAT_BC5s;
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case dds::FORMAT_BC6H:
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return PIXELFORMAT_BC6H;
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case dds::FORMAT_BC6Hs:
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return PIXELFORMAT_BC6Hs;
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case dds::FORMAT_BC7:
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return PIXELFORMAT_BC7;
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case dds::FORMAT_BC7srgb:
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sRGB = true;
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return PIXELFORMAT_BC7;
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default:
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return PIXELFORMAT_UNKNOWN;
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}
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}
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} // magpie
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} // image
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} // love
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