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--------- Co-authored-by: Kevin Eady <8634912+KevinEady@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| #pragma once | ||
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| #include <stdexcept> | ||
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| namespace Pol::Plib::MUL | ||
| { | ||
| struct Map | ||
| { | ||
| static constexpr size_t blockWidth = 8; | ||
| static constexpr size_t blockHeight = 8; | ||
| static constexpr size_t cellSize = 3; | ||
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| // DWORD + 64 cells (3 bytes) per block | ||
| static constexpr size_t blockSize = 4 + cellSize * blockWidth * blockHeight; | ||
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| static constexpr size_t expected_blocks( int width, int height ) | ||
| { | ||
| return ( width / blockWidth ) * ( height / blockHeight ); | ||
| } | ||
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| static constexpr bool valid_size( size_t filesize, int width, int height ) | ||
| { | ||
| if ( width % blockWidth != 0 ) | ||
| return false; | ||
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| if ( height % blockHeight != 0 ) | ||
| return false; | ||
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| size_t nblocks = filesize / Map::blockSize; | ||
| return expected_blocks( width, height ) == nblocks; | ||
| } | ||
| }; | ||
| static_assert( Map::blockSize == 196, "Size mismatch" ); | ||
| static_assert( Map::valid_size( 77070336, 6144, 4096 ) ); // Legacy map | ||
| static_assert( Map::valid_size( 89915392, 7168, 4096 ) ); // New maps | ||
| static_assert( Map::valid_size( 77070336 - 196, 6144, 4096 ) == false ); // Wrong map 1 | ||
| static_assert( Map::valid_size( 89915392 - 196, 7168, 4096 ) == false ); // Wrong map 2 | ||
|
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| class MapInfo | ||
| { | ||
| int _width = 0; | ||
| int _height = 0; | ||
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| bool _guessed_correctly = false; | ||
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| void set_default_size(); | ||
| bool guess_size( size_t filesize ); | ||
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| public: | ||
| int width() { return _width; } | ||
| int height() { return _height; } | ||
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| bool guessed() { return _guessed_correctly; } | ||
| bool matches_filesize() { return Map::valid_size( filesize, _width, _height ); } | ||
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| const int mapid = -1; | ||
| const size_t filesize = 0; | ||
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| MapInfo( int mapid ) : mapid( mapid ) { set_default_size(); } | ||
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| MapInfo( int mapid, size_t filesize ) : mapid( mapid ), filesize( filesize ) | ||
| { | ||
| set_default_size(); | ||
| if ( _height == 0 && _width == 0 ) | ||
| { | ||
| _guessed_correctly = guess_size( filesize ); | ||
| } | ||
| } | ||
| }; | ||
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| inline bool MapInfo::guess_size( size_t map_size ) | ||
| { | ||
| // Guessing is only implemented for britannia now | ||
| if ( mapid != 0 && mapid != 1 ) | ||
| return false; | ||
|
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| constexpr int map0_height = 4096; | ||
|
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| size_t mapblocks = map_size / Map::blockSize; | ||
| constexpr int map0_blocks = map0_height / Map::blockHeight; | ||
|
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| // Number of blocks has to be divisible by either dimension | ||
| if ( ( mapblocks % map0_blocks ) != 0 ) | ||
| return false; | ||
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| _height = map0_height; | ||
| _width = static_cast<int>( Map::blockWidth * ( mapblocks / map0_blocks ) ); | ||
|
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| return true; | ||
| } | ||
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| inline void MapInfo::set_default_size() | ||
| { | ||
| _width = 0; | ||
| _height = 0; | ||
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| switch ( mapid ) | ||
| { | ||
| case 0: // britannia / britannia-alt | ||
| case 1: | ||
| // depends on the filesize | ||
| break; | ||
| case 2: // ilshenar: | ||
| _width = 2304; | ||
| _height = 1600; | ||
| break; | ||
| case 3: // malas | ||
| _width = 2560; | ||
| _height = 2048; | ||
| break; | ||
| case 4: // tokuno | ||
| _width = 1448; | ||
| _height = 1448; | ||
| break; | ||
| case 5: // termur | ||
| _width = 1280; | ||
| _height = 4096; | ||
| break; | ||
| } | ||
| } | ||
|
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| }; // namespace Pol::Plib::MUL |
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