mirror of
https://github.com/vcmi/vcmi.git
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339 lines
9.1 KiB
C++
339 lines
9.1 KiB
C++
/*
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* CDefFile.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "CDefFile.h"
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#include "IImageLoader.h"
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#include "../../lib/filesystem/Filesystem.h"
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#include "../../lib/Point.h"
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#include <SDL_pixels.h>
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// Extremely simple file cache. TODO: smarter, more general solution
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class CFileCache
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{
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static const int cacheSize = 50; //Max number of cached files
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struct FileData
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{
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ResourceID name;
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size_t size;
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std::unique_ptr<ui8[]> data;
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std::unique_ptr<ui8[]> getCopy()
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{
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auto ret = std::unique_ptr<ui8[]>(new ui8[size]);
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std::copy(data.get(), data.get() + size, ret.get());
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return ret;
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}
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FileData(ResourceID name_, size_t size_, std::unique_ptr<ui8[]> data_):
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name{std::move(name_)},
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size{size_},
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data{std::move(data_)}
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{}
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};
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std::deque<FileData> cache;
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public:
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std::unique_ptr<ui8[]> getCachedFile(ResourceID rid)
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{
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for(auto & file : cache)
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{
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if (file.name == rid)
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return file.getCopy();
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}
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// Still here? Cache miss
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if (cache.size() > cacheSize)
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cache.pop_front();
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auto data = CResourceHandler::get()->load(rid)->readAll();
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cache.emplace_back(std::move(rid), data.second, std::move(data.first));
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return cache.back().getCopy();
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}
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};
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enum class DefType : uint32_t
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{
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SPELL = 0x40,
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SPRITE = 0x41,
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CREATURE = 0x42,
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MAP = 0x43,
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MAP_HERO = 0x44,
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TERRAIN = 0x45,
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CURSOR = 0x46,
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INTERFACE = 0x47,
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SPRITE_FRAME = 0x48,
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BATTLE_HERO = 0x49
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};
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static CFileCache animationCache;
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/*************************************************************************
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* DefFile, class used for def loading *
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*************************************************************************/
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static bool colorsSimilar (const SDL_Color & lhs, const SDL_Color & rhs)
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{
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// it seems that H3 does not requires exact match to replace colors -> (255, 103, 255) gets interpreted as shadow
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// exact logic is not clear and requires extensive testing with image editing
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// potential reason is that H3 uses 16-bit color format (565 RGB bits), meaning that 3 least significant bits are lost in red and blue component
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static const int threshold = 8;
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int diffR = static_cast<int>(lhs.r) - rhs.r;
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int diffG = static_cast<int>(lhs.g) - rhs.g;
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int diffB = static_cast<int>(lhs.b) - rhs.b;
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int diffA = static_cast<int>(lhs.a) - rhs.a;
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return std::abs(diffR) < threshold && std::abs(diffG) < threshold && std::abs(diffB) < threshold && std::abs(diffA) < threshold;
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}
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CDefFile::CDefFile(std::string Name):
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data(nullptr),
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palette(nullptr)
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{
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//First 8 colors in def palette used for transparency
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static const SDL_Color sourcePalette[8] = {
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{0, 255, 255, SDL_ALPHA_OPAQUE},
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{255, 150, 255, SDL_ALPHA_OPAQUE},
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{255, 100, 255, SDL_ALPHA_OPAQUE},
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{255, 50, 255, SDL_ALPHA_OPAQUE},
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{255, 0, 255, SDL_ALPHA_OPAQUE},
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{255, 255, 0, SDL_ALPHA_OPAQUE},
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{180, 0, 255, SDL_ALPHA_OPAQUE},
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{0, 255, 0, SDL_ALPHA_OPAQUE}
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};
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static const SDL_Color targetPalette[8] = {
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{0, 0, 0, 0 }, // transparency ( used in most images )
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{0, 0, 0, 64 }, // shadow border ( used in battle, adventure map def's )
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{0, 0, 0, 64 }, // shadow border ( used in fog-of-war def's )
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{0, 0, 0, 128}, // shadow body ( used in fog-of-war def's )
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{0, 0, 0, 128}, // shadow body ( used in battle, adventure map def's )
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{0, 0, 0, 0 }, // selection / owner flag ( used in battle, adventure map def's )
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{0, 0, 0, 128}, // shadow body below selection ( used in battle def's )
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{0, 0, 0, 64 } // shadow border below selection ( used in battle def's )
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};
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data = animationCache.getCachedFile(ResourceID(std::string("SPRITES/") + Name, EResType::ANIMATION));
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palette = std::unique_ptr<SDL_Color[]>(new SDL_Color[256]);
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int it = 0;
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//ui32 type = read_le_u32(data.get() + it);
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it+=4;
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//int width = read_le_u32(data + it); it+=4;//not used
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//int height = read_le_u32(data + it); it+=4;
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it+=8;
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ui32 totalBlocks = read_le_u32(data.get() + it);
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it+=4;
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for (ui32 i= 0; i<256; i++)
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{
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palette[i].r = data[it++];
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palette[i].g = data[it++];
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palette[i].b = data[it++];
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palette[i].a = SDL_ALPHA_OPAQUE;
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}
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// these colors seems to be used unconditionally
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palette[0] = targetPalette[0];
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palette[1] = targetPalette[1];
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palette[4] = targetPalette[4];
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// rest of special colors are used only if their RGB values are close to H3
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for (uint32_t i = 0; i < 8; ++i)
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{
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if (colorsSimilar(sourcePalette[i], palette[i]))
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palette[i] = targetPalette[i];
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}
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for (ui32 i=0; i<totalBlocks; i++)
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{
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size_t blockID = read_le_u32(data.get() + it);
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it+=4;
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size_t totalEntries = read_le_u32(data.get() + it);
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it+=12;
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//8 unknown bytes - skipping
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//13 bytes for name of every frame in this block - not used, skipping
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it+= 13 * (int)totalEntries;
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for (ui32 j=0; j<totalEntries; j++)
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{
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size_t currOffset = read_le_u32(data.get() + it);
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offset[blockID].push_back(currOffset);
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it += 4;
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}
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}
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}
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void CDefFile::loadFrame(size_t frame, size_t group, IImageLoader &loader) const
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{
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std::map<size_t, std::vector <size_t> >::const_iterator it;
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it = offset.find(group);
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assert (it != offset.end());
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const ui8 * FDef = data.get()+it->second[frame];
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const SSpriteDef sd = * reinterpret_cast<const SSpriteDef *>(FDef);
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SSpriteDef sprite;
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sprite.format = read_le_u32(&sd.format);
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sprite.fullWidth = read_le_u32(&sd.fullWidth);
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sprite.fullHeight = read_le_u32(&sd.fullHeight);
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sprite.width = read_le_u32(&sd.width);
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sprite.height = read_le_u32(&sd.height);
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sprite.leftMargin = read_le_u32(&sd.leftMargin);
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sprite.topMargin = read_le_u32(&sd.topMargin);
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ui32 currentOffset = sizeof(SSpriteDef);
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//special case for some "old" format defs (SGTWMTA.DEF and SGTWMTB.DEF)
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if(sprite.format == 1 && sprite.width > sprite.fullWidth && sprite.height > sprite.fullHeight)
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{
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sprite.leftMargin = 0;
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sprite.topMargin = 0;
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sprite.width = sprite.fullWidth;
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sprite.height = sprite.fullHeight;
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currentOffset -= 16;
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}
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const ui32 BaseOffset = currentOffset;
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loader.init(Point(sprite.width, sprite.height),
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Point(sprite.leftMargin, sprite.topMargin),
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Point(sprite.fullWidth, sprite.fullHeight), palette.get());
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switch(sprite.format)
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{
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case 0:
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{
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//pixel data is not compressed, copy data to surface
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for(ui32 i=0; i<sprite.height; i++)
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{
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loader.load(sprite.width, FDef + currentOffset);
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currentOffset += sprite.width;
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loader.endLine();
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}
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break;
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}
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case 1:
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{
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//for each line we have offset of pixel data
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const ui32 * RWEntriesLoc = reinterpret_cast<const ui32 *>(FDef+currentOffset);
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currentOffset += sizeof(ui32) * sprite.height;
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for(ui32 i=0; i<sprite.height; i++)
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{
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//get position of the line
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currentOffset=BaseOffset + read_le_u32(RWEntriesLoc + i);
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ui32 TotalRowLength = 0;
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while(TotalRowLength<sprite.width)
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{
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ui8 segmentType = FDef[currentOffset++];
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ui32 length = FDef[currentOffset++] + 1;
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if(segmentType==0xFF)//Raw data
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{
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loader.load(length, FDef + currentOffset);
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currentOffset+=length;
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}
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else// RLE
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{
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loader.load(length, segmentType);
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}
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TotalRowLength += length;
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}
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loader.endLine();
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}
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break;
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}
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case 2:
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{
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currentOffset = BaseOffset + read_le_u16(FDef + BaseOffset);
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for(ui32 i=0; i<sprite.height; i++)
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{
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ui32 TotalRowLength=0;
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while(TotalRowLength<sprite.width)
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{
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ui8 segment=FDef[currentOffset++];
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ui8 code = segment / 32;
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ui8 length = (segment & 31) + 1;
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if(code==7)//Raw data
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{
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loader.load(length, FDef + currentOffset);
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currentOffset += length;
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}
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else//RLE
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{
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loader.load(length, code);
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}
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TotalRowLength+=length;
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}
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loader.endLine();
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}
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break;
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}
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case 3:
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{
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for(ui32 i=0; i<sprite.height; i++)
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{
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currentOffset = BaseOffset + read_le_u16(FDef + BaseOffset+i*2*(sprite.width/32));
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ui32 TotalRowLength=0;
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while(TotalRowLength<sprite.width)
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{
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ui8 segment = FDef[currentOffset++];
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ui8 code = segment / 32;
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ui8 length = (segment & 31) + 1;
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if(code==7)//Raw data
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{
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loader.load(length, FDef + currentOffset);
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currentOffset += length;
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}
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else//RLE
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{
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loader.load(length, code);
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}
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TotalRowLength += length;
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}
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loader.endLine();
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}
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break;
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}
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default:
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logGlobal->error("Error: unsupported format of def file: %d", sprite.format);
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break;
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}
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}
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CDefFile::~CDefFile() = default;
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const std::map<size_t, size_t > CDefFile::getEntries() const
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{
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std::map<size_t, size_t > ret;
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for (auto & elem : offset)
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ret[elem.first] = elem.second.size();
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return ret;
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}
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