bb
157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
109 lines
3.7 KiB
C++
109 lines
3.7 KiB
C++
/* Copyright (C) 2021 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "MapIO.h"
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#include "graphics/Patch.h"
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#include "lib/allocators/shared_ptr.h"
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#include "lib/file/file.h"
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#include "lib/file/vfs/vfs_path.h"
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#include "lib/os_path.h"
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#include "lib/status.h"
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#include "lib/tex/tex.h"
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#include "maths/MathUtil.h"
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#include "ps/Filesystem.h"
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#include <algorithm>
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#include <vector>
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Status ParseHeightmapImage(const std::shared_ptr<u8>& fileData, size_t fileSize, std::vector<u16>& heightmap);
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Status LoadHeightmapImageVfs(const VfsPath& filepath, std::vector<u16>& heightmap)
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{
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std::shared_ptr<u8> fileData;
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size_t fileSize;
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RETURN_STATUS_IF_ERR(g_VFS->LoadFile(filepath, fileData, fileSize));
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return ParseHeightmapImage(fileData, fileSize, heightmap);
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}
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Status LoadHeightmapImageOs(const OsPath& filepath, std::vector<u16>& heightmap)
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{
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File file;
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RETURN_STATUS_IF_ERR(file.Open(OsString(filepath), O_RDONLY));
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size_t fileSize = lseek(file.Descriptor(), 0, SEEK_END);
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lseek(file.Descriptor(), 0, SEEK_SET);
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std::shared_ptr<u8> fileData;
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RETURN_STATUS_IF_ERR(AllocateAligned(fileData, fileSize, maxSectorSize));
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Status readvalue = read(file.Descriptor(), fileData.get(), fileSize);
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file.Close();
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RETURN_STATUS_IF_ERR(readvalue);
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return ParseHeightmapImage(fileData, fileSize, heightmap);
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}
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Status ParseHeightmapImage(const std::shared_ptr<u8>& fileData, size_t fileSize, std::vector<u16>& heightmap)
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{
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// Decode to a raw pixel format
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Tex tex;
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RETURN_STATUS_IF_ERR(tex.decode(fileData, fileSize));
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// Convert to uncompressed BGRA with no mipmaps.
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// Note that grayscale images don't get converted - they remain grayscale, 8-bits per pixel.
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RETURN_STATUS_IF_ERR(tex.transform_to((tex.m_Flags | TEX_BGR | TEX_ALPHA) & ~(TEX_DXT | TEX_MIPMAPS)));
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// Pick smallest side of texture; truncate if not divisible by PATCH_SIZE
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ssize_t tileSize = std::min(tex.m_Width, tex.m_Height);
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tileSize -= tileSize % PATCH_SIZE;
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u8* mapdata = tex.get_data();
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ssize_t bytesPP = tex.m_Bpp / 8;
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ssize_t mapLineSkip = tex.m_Width * bytesPP;
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// Copy image data into the heightmap
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heightmap.resize(SQR(tileSize + 1));
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// if hoisted out of the loop as a micro-optimisation that doesn't harm readability much.
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if (bytesPP == 1)
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for (ssize_t y = 0; y < tileSize + 1; ++y)
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for (ssize_t x = 0; x < tileSize + 1; ++x)
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{
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// Repeat the last pixel of the image for the last vertex of the heightmap
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int offset = std::min(y, tileSize - 1) * mapLineSkip + std::min(x, tileSize - 1);
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heightmap[(tileSize - y) * (tileSize + 1) + x] = static_cast<u16>(256) * mapdata[offset];
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}
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else if (bytesPP == 4)
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for (ssize_t y = 0; y < tileSize + 1; ++y)
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for (ssize_t x = 0; x < tileSize + 1; ++x)
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{
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// Repeat the last pixel of the image for the last vertex of the heightmap
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int offset = std::min(y, tileSize - 1) * mapLineSkip + std::min(x, tileSize - 1) * bytesPP;
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heightmap[(tileSize - y) * (tileSize + 1) + x] = static_cast<u16>(256) * std::max({
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mapdata[offset],
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mapdata[offset + 1],
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mapdata[offset + 2]});
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}
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return INFO::OK;
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}
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