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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
//=============================================================================
//
// WFNFont - an immutable AGS font object.
//
//-----------------------------------------------------------------------------
//
// WFN format:
// - signature ( 15 )
// - offsets table offset ( 2 )
// - characters table (for unknown number of char items):
// - width ( 2 )
// - height ( 2 )
// - pixel bits ( (width / 8 + 1) * height )
// - any unknown data
// - offsets table (for X chars):
// - character offset ( 2 )
//
// NOTE: unfortunately, at the moment the format does not provide means to
// know the number of supported characters for certain, and the size of the
// data (file) is used to determine that.
//
//=============================================================================
#ifndef AGS_SHARED_FONT_WFN_FONT_H
#define AGS_SHARED_FONT_WFN_FONT_H
#include "common/std/vector.h"
#include "ags/shared/core/types.h"
namespace AGS3 {
namespace AGS {
namespace Shared {
class Stream;
} // namespace Shared
} // namespace AGS
enum WFNError {
kWFNErr_NoError,
kWFNErr_BadSignature,
kWFNErr_BadTableAddress,
kWFNErr_HasBadCharacters
};
struct WFNChar {
uint16_t Width;
uint16_t Height;
const uint8_t *Data;
WFNChar();
inline size_t GetRowByteCount() const {
return (Width + 7) / 8;
}
inline size_t GetRequiredPixelSize() const {
return GetRowByteCount() * Height;
}
// Ensure character's width & height fit in given number of pixel bytes
void RestrictToBytes(size_t bytes);
};
class WFNFont {
public:
inline uint16_t GetCharCount() const {
return static_cast<uint16_t>(_refs.size());
}
// Get WFN character for the given code; if the character is missing, returns empty character
const WFNChar &GetChar(uint16_t code) const;
void Clear();
// Reads WFNFont object, using data_size bytes from stream; if data_size = 0,
// the available stream's length is used instead. Returns error code.
WFNError ReadFromFile(AGS::Shared::Stream *in, const soff_t data_size = 0);
protected:
std::vector<const WFNChar *> _refs; // reference array, contains pointers to elements of _items
std::vector<WFNChar> _items; // actual character items
std::vector<uint8_t> _pixelData; // pixel data array
};
} // namespace AGS3
#endif
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