/*
 * Bael'Zharon's Respite
 * Copyright (C) 2014 Daniel Skorupski
 *
 * 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 2 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#ifndef BZR_GRAPHICS_IMAGE_H
#define BZR_GRAPHICS_IMAGE_H

struct Palette;

// enum PixelFormatID
enum class PixelFormat : uint32_t
{
    kUnknown = 0x0000, // used
    kR8G8B8 = 0x0014, // used
    kA8R8G8B8 = 0x0015, // used
    kX8R8G8B8 = 0x0016,
    kR5G6B5 = 0x0017, // used
    kX1R5G5B5 = 0x0018,
    kA1R5G5B5 = 0x0019,
    kA4R4G4B4 = 0x001a, // used
    kR3G3B2 = 0x001b,
    kA8 = 0x001c, // used
    kA8R3G3B2 = 0x001d,
    kX4R4G4B4 = 0x001e,
    kA2B10G10R10 = 0x001f,
    kA8B8G8R8 = 0x0020,
    kX8B8G8R8 = 0x0021,
    kA2R10G10B10 = 0x0023,
    kA8P8 = 0x0028,
    kP8 = 0x0029, // used
    kL8 = 0x0032,
    kA8L8 = 0x0033,
    kA4L4 = 0x0034,
    kV8U8 = 0x003c,
    kL6V5U5 = 0x003d,
    kX8L8V8U8 = 0x003e,
    kQ8W8V8U8 = 0x003f,
    kV16U16 = 0x0040,
    kA2W10V10U10 = 0x0043,
    kD16_Lockable = 0x0046,
    kD32 = 0x0047,
    kD15S1 = 0x0049,
    kD24S8 = 0x004b,
    kD24X8 = 0x004d,
    kD24X4S4 = 0x004f,
    kD16 = 0x0050,
    kVertexData = 0x0064,
    kIndex16 = 0x0065, // used
    kIndex32 = 0x0066,
    kCustom_R8G8B8A8 = 0x00f0,
    kCustom_A8B8G8R8 = 0x00f1,
    kCustom_B8G8R8 = 0x00f2,
    kCustomLscapeR8G8B8 = 0x00f3, // used
    kCustomLscapeAlpha = 0x00f4, // used
    kCustomRawJPEG = 0x01f4, // used
    kYUY2 = 0x32595559,
    kUYVY = 0x59565955,
    kG8R8_G8B8 = 0x42475247,
    kR8G8_B8G8 = 0x47424752,
    kDXT1 = 0x31545844, // used
    kDXT2 = 0x32545844,
    kDXT3 = 0x33545844, // used
    kDXT4 = 0x34545844,
    kDXT5 = 0x35545844 // used
};

int bitsPerPixel(PixelFormat format);
bool isPaletted(PixelFormat format);
bool isCompressed(PixelFormat format);
bool hasAlpha(PixelFormat format);

class Image
{
public:
    Image();

    void init(PixelFormat newFormat, int newWidth, int newHeight, const void* newData);

    void applyPalette(const Palette& palette);
    void scale(int newWidth, int newHeight);
    void fill(int value);
    void flipVertical();

    PixelFormat format() const;
    int width() const;
    int height() const;
    size_t size() const;
    const uint8_t* data() const;
    bool hasAlpha() const;

private:
    template<class T>
    void applyPalette(const Palette& palette);

    void updateHasAlpha();

    PixelFormat format_;
    int width_;
    int height_;
    vector<uint8_t> data_;
    bool hasAlpha_;
};

#endif