CPngImage.h

/*
╔══════════════════════════════════════════════════════════════════════════════╗
║                       SIMPLY POWERFUL TOOLKIT (SPTK)                         ║
╟──────────────────────────────────────────────────────────────────────────────╢
║  copyright            © 1999-2022 Alexey Parshin. All rights reserved.       ║
║  email                alexeyp@gmail.com                                      ║
╚══════════════════════════════════════════════════════════════════════════════╝
┌──────────────────────────────────────────────────────────────────────────────┐
│   This library is free software; you can redistribute it and/or modify it    │
│   under the terms of the GNU Library General Public License as published by  │
│   the Free Software Foundation; either version 2 of the License, or (at your │
│   option) any later version.                                                 │
│                                                                              │
│   This library 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 Library   │
│   General Public License for more details.                                   │
│                                                                              │
│   You should have received a copy of the GNU Library General Public License  │
│   along with this library; if not, write to the Free Software Foundation,    │
│   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.               │
│                                                                              │
│   Please report all bugs and problems to alexeyp@gmail.com.                  │
└──────────────────────────────────────────────────────────────────────────────┘
*/
 
#pragma once
 
#include <FL/Fl.H>
#include <FL/Fl_Image.H>
#include <sptk5/Buffer.h>
 
namespace sptk {
 
enum class CBorderIndex : uint8_t
{
    BORDER_LEFT,
    BORDER_RIGHT,
    BORDER_TOP,
    BORDER_BOTTOM
};
 
class SP_EXPORT CPngImage
    : public Fl_RGB_Image
{
 
    friend class CIcon;
 
    using resized_draw_function = void (*)(CPngImage* image, int srcX, int srcY, int srcW, int srcH, int destX,
                                           int destY, int destW, int destH);
 
protected:
    void load(const Buffer& buffer);
 
    static void cutTileDraw(CPngImage* image, int srcX, int srcY, int srcW, int srcH, int destX, int destY, int destW,
                            int destH);
 
    static void cutStretchDraw(CPngImage* image, int srcX, int srcY, int srcW, int srcH, int destX, int destY,
                               int destW, int destH);
 
public:
    enum class CPatternDrawMode : uint8_t
    {
        PDM_UNDEFINED,
 
        PDM_TILE,
 
        PDM_STRETCH
 
    };
 
    void cutTileDraw(int srcX, int srcY, int srcW, int srcH, int destX, int destY, int destW, int destH)
    {
        cutTileDraw(this, srcX, srcY, srcW, srcH, destX, destY, destW, destH);
    }
 
    void cutStretchDraw(int srcX, int srcY, int srcW, int srcH, int destX, int destY, int destW, int destH)
    {
        cutStretchDraw(this, srcX, srcY, srcW, srcH, destX, destY, destW, destH);
    }
 
    explicit CPngImage(const Buffer& imagedata);
 
    explicit CPngImage(const Fl_RGB_Image* image);
 
    explicit CPngImage(const String& fileName);
 
    void drawResized(int x, int y, int w, int h, int cornerZone, CPatternDrawMode drawMode, bool drawBackground);
 
    void drawResized(int x, int y, int w, int h, int border[], CPatternDrawMode drawMode, bool drawBackground);
};
 
} // namespace sptk