/*
** texture.cpp
** The base texture class
**
**---------------------------------------------------------------------------
** Copyright 2004-2007 Randy Heit
** Copyright 2006-2018 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**
*/

#include "memarena.h"
#include "bitmap.h"
#include "image.h"
#include "files.h"
#include "cache1d.h"

int FImageSource::NextID;

//===========================================================================
// 
// the default just returns an empty texture.
//
//===========================================================================

TArray<uint8_t> FImageSource::CreatePalettedPixels(int conversion)
{
	TArray<uint8_t> Pixels(Width * Height, true);
	memset(Pixels.Data(), 0, Width * Height);
	return Pixels;
}


//===========================================================================
//
// FImageSource::CopyPixels
//
// this is the generic case that can handle
// any properly implemented texture for software rendering.
// Its drawback is that it is limited to the base palette which is
// why all classes that handle different palettes should subclass this
// method
//
//===========================================================================

int FImageSource::CopyTranslatedPixels(FBitmap *bmp, PalEntry *remap)
{
	auto ppix = CreatePalettedPixels(false);
	bmp->CopyPixelData(0, 0, ppix.Data(), Width, Height, Height, 1, 0, remap);
	return 0;
}

int FImageSource::CopyPixels(FBitmap* bmp, int conversion)
{
	return CopyTranslatedPixels(bmp, nullptr);	// This should never get called for ART tiles.
}


//==========================================================================
//
//
//
//==========================================================================

typedef FImageSource * (*CreateFunc)(FileReader & file);

struct TexCreateInfo
{
	CreateFunc TryCreate;
};

FImageSource *PNGImage_TryCreate(FileReader &);
FImageSource *JPEGImage_TryCreate(FileReader &);
FImageSource *DDSImage_TryCreate(FileReader &);
FImageSource *PCXImage_TryCreate(FileReader &);
FImageSource *TGAImage_TryCreate(FileReader &);
FImageSource *ArtImage_TryCreate(FileReader &);


// Examines the lump contents to decide what type of texture to create,
// and creates the texture.
FImageSource * FImageSource::GetImage(const char *name)
{
	static TexCreateInfo CreateInfo[] = {
		{ PNGImage_TryCreate },
		{ JPEGImage_TryCreate },
		{ DDSImage_TryCreate },
		{ PCXImage_TryCreate },
		{ ArtImage_TryCreate },
		{ nullptr }
	};

	auto data = kopenFileReader(name, 0);
	if (!data.isOpen())  return nullptr;

	for (size_t i = 0; CreateInfo[i].TryCreate; i++)
	{
		auto image = CreateInfo[i].TryCreate(data);
		if (image != nullptr)
		{
			image->Name = name;
			return image;
		}
	}
	return nullptr;
}