/*
Popup Plus plugin for Miranda IM

Copyright	© 2002 Luca Santarelli,
© 2004-2007 Victor Pavlychko
© 2010 MPK
© 2010 Merlin_de

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

/* 99% of this code was adopted from clist_modern by FYR */

#include "stdafx.h"

#undef Translate

//  fix for old SDK and new GDI+
#define ULONG_PTR unsigned long

#include "gdiplus.h"

DWORD g_gdiplusToken;
bool gbGdiPlusLoaded;

void LoadGDIPlus()
{
	Gdiplus::GdiplusStartupInput gdiplusStartupInput;
	gbGdiPlusLoaded = false;
	__try {
		if (g_gdiplusToken == 0)
			Gdiplus::GdiplusStartup(&g_gdiplusToken, &gdiplusStartupInput, nullptr);
	}
	__except (EXCEPTION_EXECUTE_HANDLER)
	{
		gbGdiPlusLoaded = false;
	}
}

void UnloadGDIPlus()
{
	Gdiplus::GdiplusStartupInput gdiplusStartupInput;
	__try {
		if (g_gdiplusToken && gbGdiPlusLoaded)
			Gdiplus::GdiplusShutdown(g_gdiplusToken);
	}
	__except (EXCEPTION_EXECUTE_HANDLER)
	{
		//  do nothing
	}
	gbGdiPlusLoaded = true;
	g_gdiplusToken = 0;
}

using namespace Gdiplus;

/////////////////////////////////////////////////////////////////////////////////
//  GDIPlus_IsAnimatedGIF and GDIPlus_ExtractAnimatedGIF
//  based on routine from http:// www.codeproject.com/vcpp/gdiplus/imageexgdi.asp
// 

HBITMAP SkinEngine_CreateDIB32(int cx, int cy)
{
	if (cx < 0 || cy < 0) {
		return nullptr;
	}

	BITMAPINFO RGB32BitsBITMAPINFO;
	memset(&RGB32BitsBITMAPINFO, 0, sizeof(BITMAPINFO));
	RGB32BitsBITMAPINFO.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	RGB32BitsBITMAPINFO.bmiHeader.biWidth = cx;// bm.bmWidth;
	RGB32BitsBITMAPINFO.bmiHeader.biHeight = cy;// bm.bmHeight;
	RGB32BitsBITMAPINFO.bmiHeader.biPlanes = 1;
	RGB32BitsBITMAPINFO.bmiHeader.biBitCount = 32;
	//  pointer used for direct Bitmap pixels access


	UINT *ptPixels;
	HBITMAP DirectBitmap = CreateDIBSection(nullptr, &RGB32BitsBITMAPINFO, DIB_RGB_COLORS, (void **)&ptPixels, nullptr, 0);
	if ((DirectBitmap == nullptr || ptPixels == nullptr) && cx != 0 && cy != 0) {
		;
	}
	else {
		memset(ptPixels, 0, cx*cy * 4);
	}
	return DirectBitmap;
}


BOOL GDIPlus_IsAnimatedGIF(wchar_t * szName)
{
	int nFrameCount = 0;
	Image image(szName);

	UINT count = image.GetFrameDimensionsCount();
	GUID* pDimensionIDs = new GUID[count];

	//  Get the list of frame dimensions from the Image object.
	image.GetFrameDimensionsList(pDimensionIDs, count);

	//  Get the number of frames in the first dimension.
	nFrameCount = image.GetFrameCount(&pDimensionIDs[0]);

	delete[]pDimensionIDs;

	return (BOOL)(nFrameCount > 1) && image.GetWidth() && image.GetHeight();
}

void GDIPlus_GetGIFSize(wchar_t *szName, int *width, int *height)
{
	Image image(szName);

	*width = image.GetWidth();
	*height = image.GetHeight();
}

void GDIPlus_ExtractAnimatedGIF(wchar_t *szName, int width, int height, HBITMAP &pBitmap, int* &pframesDelay, int &pframesCount, SIZE &pSizeAvatar)
{
	int nFrameCount = 0;
	Bitmap image(szName);
	PropertyItem * pPropertyItem;

	UINT count = 0;

	count = image.GetFrameDimensionsCount();
	GUID* pDimensionIDs = new GUID[count];

	//  Get the list of frame dimensions from the Image object.
	image.GetFrameDimensionsList(pDimensionIDs, count);

	//  Get the number of frames in the first dimension.
	nFrameCount = image.GetFrameCount(&pDimensionIDs[0]);

	//  Assume that the image has a property item of type PropertyItemEquipMake.
	//  Get the size of that property item.
	int nSize = image.GetPropertyItemSize(PropertyTagFrameDelay);

	//  Allocate a buffer to receive the property item.
	pPropertyItem = (PropertyItem*)mir_alloc(nSize);

	image.GetPropertyItem(PropertyTagFrameDelay, nSize, pPropertyItem);

	int clipWidth;
	int clipHeight;
	int imWidth = image.GetWidth();
	int imHeight = image.GetHeight();
	float xscale = (float)width / imWidth;
	float yscale = (float)height / imHeight;
	xscale = min(xscale, yscale);
	clipWidth = (int)(xscale*imWidth + .5);
	clipHeight = (int)(xscale*imHeight + .5);

	HBITMAP hBitmap = SkinEngine_CreateDIB32(clipWidth*nFrameCount, height);
	HDC hdc = CreateCompatibleDC(nullptr);
	HBITMAP oldBmp = (HBITMAP)SelectObject(hdc, hBitmap);
	Graphics graphics(hdc);
	ImageAttributes attr;
	graphics.SetInterpolationMode(InterpolationModeHighQualityBicubic);

	int * delays = (int*)mir_alloc(nFrameCount*sizeof(int));
	memset(delays, 0, nFrameCount*sizeof(int));

	for (int i = 1; i < nFrameCount + 1; i++) {
		GUID pageGuid = FrameDimensionTime;
		RectF rect((float)(i - 1)*clipWidth, (float)0, (float)clipWidth, (float)clipHeight);
		graphics.DrawImage(&image, rect, (float)0, (float)0, (float)imWidth, (float)imHeight, UnitPixel, &attr, nullptr, nullptr);
		image.SelectActiveFrame(&pageGuid, i);
		long lPause = ((long*)pPropertyItem->value)[i - 1] * 10;
		delays[i - 1] = (int)lPause;
	}
	SelectObject(hdc, oldBmp);
	DeleteDC(hdc);
	mir_free(pPropertyItem);
	pPropertyItem = nullptr;
	delete[]pDimensionIDs;

	pBitmap = hBitmap;
	pframesDelay = delays;
	pframesCount = nFrameCount;
	pSizeAvatar.cx = clipWidth;
	pSizeAvatar.cy = clipHeight;

	GdiFlush();
}