//  BlockyFroggy
//  Copyright © 2017 John Ryland.
//  All rights reserved.
#pragma once
#ifndef IMAGE_H
#define IMAGE_H

/*!

@page Topics
@subpage ImageHandling
@page ImageHandling Image Handling

### Image Format Support

Formats       | Support
------------- | -------------
BMP           | No
GIF           | No
PNG           | Yes
JPEG          | No
TGA           | Yes
PVR           | WIP

*/

#include <cstdint>
#include <vector>
#include <cstdlib>

using ByteArray = std::vector<uint8_t>;

enum ImageType
{
  RAW_RGB_24BPP     = 0x8051,
  RAW_RGBA_32BPP    = 0x8058,
  //PVR_Alpha_2BPP,
  //PVR_Alpha_4BPP,
  PVRTC_RGB_4BPPV1  = 0x8C00,
  PVRTC_RGB_2BPPV1  = 0x8C01,
  PVRTC_RGBA_4BPPV1 = 0x8C02,
  PVRTC_RGBA_2BPPV1 = 0x8C03,
};


//! Holds image formatted data in an array of bytes.
struct Image
{
  ImageType    m_type;
  ByteArray    m_data;
  size_t       m_width;
  size_t       m_height;
};


bool LoadFile(const char* filename, ByteArray& data);
bool SaveFile(const char* filename, const ByteArray& data);

bool DecodeTGA(const ByteArray& inData, Image& outImage);
bool EncodeTGA(const Image& inImage, ByteArray& outData);

bool DecodePNG(const ByteArray& inData, Image& outImage);
//bool EncodePNG(const Image& inImage, ByteArray& outData);

bool ConvertImage(const Image& inImage, Image& outImage, ImageType outputFormat = PVRTC_RGB_4BPPV1);


#endif // IMAGE_H