graphics.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 WAYNESWORLD_GRAPHICS_H
#define WAYNESWORLD_GRAPHICS_H

#include "waynesworld/waynesworld.h"
#include "graphics/surface.h"

namespace WaynesWorld {

class WWSurface : public Graphics::Surface {
public:
    WWSurface(int width, int height);
    WWSurface(const Graphics::Surface *sourceSurface);
    ~WWSurface();

    void drawSurface(const Graphics::Surface *surface, int x, int y);
    void drawSurfaceTransparent(const Graphics::Surface *surface, int x, int y);
    void scaleSurface(const Graphics::Surface *surface);
    void frameRect(int x1, int y1, int x2, int y2, byte color);
    void fillSquare(int x, int y, int length, byte color);
    void fillRect(int x1, int y1, int x2, int y2, byte color);
    void clear(byte color);
};

class GFTFont {
public:
    GFTFont();
    ~GFTFont();

    void loadFromFile(const char *filename);
    void drawText(Graphics::Surface *surface, const char *text, int x, int y, byte color);
    void drawWrappedText(Graphics::Surface *surface, const char *text, int x, int y, int maxWidth, byte color);
    int drawChar(Graphics::Surface *surface, byte ch, int x, int y, byte color);
    int getTextWidth(const char *text) const;
    int getCharWidth(byte ch) const;
protected:
    byte _firstChar = 0;
    byte _lastChar = 0;
    uint16 *_charTable = nullptr;
    byte *_fontData = nullptr;
    int16 _formWidth = 0;
    int16 _formHeight = 0;
};

class Screen {
public:
    Graphics::Surface *_screenCopy = nullptr;

    Screen();
    ~Screen();

    void beginUpdate();
    void endUpdate();
    void drawSurface(const Graphics::Surface *surface, int x, int y);
    void drawSurfaceTransparent(const Graphics::Surface *surface, int x, int y);
    void frameRect(int x1, int y1, int x2, int y2, byte color);
    void fillSquare(int x, int y, int length, byte color);
    void fillRect(int x1, int y1, int x2, int y2, byte color);
    void clear(byte color);
    void drawText(GFTFont *font, const char *text, int x, int y, byte color);
    void drawWrappedText(GFTFont *font, const char *text, int x, int y, int maxWidth, byte color);
    void saveScreenshot();
    
protected:
    Graphics::Surface *_vgaSurface = nullptr;
    int _lockCtr = 0;
};

class ScreenEffect {
public:
    ScreenEffect(WaynesWorldEngine *vm, Graphics::Surface *surface, int x, int y, int grainWidth, int grainHeight);

    void drawSpiralEffect();
    void drawRandomEffect();
protected:
    WaynesWorldEngine *_vm;
    Graphics::Surface *_surface;
    int _x, _y;
    int _grainWidth, _grainHeight;
    int _blockCountW, _blockCountH;
    int _blockCtr;
    uint32 _timePerSlice;
    uint32 _totalSliceTicks = 0;
    int _blocksPerSlice;
    void drawBlock(int blockX, int blockY);
    static uint getBitCount(int value);
    uint getSeed(uint bitCount) const;
};

} // End of namespace WaynesWorld

#endif // WAYNESWORLD_GRAPHICS_H