bgifont.h

/* 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/>.
 *
 */
#ifndef GRAPHICS_FONTS_BGIFONT_H
#define GRAPHICS_FONTS_BGIFONT_H

#include "common/file.h"
#include "common/array.h"
#include "graphics/font.h"
#include "graphics/surface.h"

namespace Graphics {

const int OPCODE_END = 0;
const int OPCODE_DOSCAN = 1;
const int OPCODE_MOVE = 2;
const int OPCODE_DRAW = 3;

class BgiFont : public Font {
public:
    BgiFont();
    ~BgiFont();

    bool loadChr(const Common::Path &fileName);
    bool loadChr(Common::SeekableReadStream &stream);

    void close();

    int getFontHeight() const { return _totalHeight; }
    int getCharWidth(uint32 chr) const;
    int getMaxCharWidth() const { return _maxWidth; }
    void drawChar(Surface *dst, uint32 chr, int x, int y, uint32 color) const;

private:
    struct DrawingInstruction {
        int opCode;
        int8 xCoord;
        int8 yCoord;
    };

    struct GlyphEntry {
        GlyphEntry() {
            charWidth = 0;
            offset = 0;
        }
        ~GlyphEntry() {}

        uint16 charWidth;
        uint32 offset;
        Common::Array<DrawingInstruction *> insts;
    } *_glyphs;

    struct CachedFont {
        int widths[256];
        int offsets[256];
        Graphics::Surface *surface;
        ~CachedFont() {
            delete surface;
        }
    };

    uint16 _charCount;
    byte _firstChar;
    // uint16 _pixHeight;
    uint16 _maxWidth = 10;
    uint32 _totalWidth = 0;
    int16 _totalHeight = 0;
    int8 _originToAscender = 0;
    int8 _originToDescender = 0;
    Common::Array<CachedFont *> _fontCache;

    uint16 characterToIndex(uint32 character) const;
    byte fixSign(byte original);
    CachedFont *drawCachedFont(int size);
};

} // namespace Graphics

#endif