/*
 *  $Id$
 *
 *  (C) 2003-2006 Gabest
 *  (C) 2006-2011 see AUTHORS
 *
 *  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, 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 GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#include "stdafx.h"
#include <d3d9.h>
#include <Vmr9.h>
#include "DX9SubPic.h"

//
// CDX9SubPic
//

CDX9SubPic::CDX9SubPic(IDirect3DSurface9* pSurface, CDX9SubPicAllocator *pAllocator, bool bExternalRenderer)
	: m_pSurface(pSurface), m_pAllocator(pAllocator), m_bExternalRenderer(bExternalRenderer)
{
	D3DSURFACE_DESC d3dsd;
	ZeroMemory(&d3dsd, sizeof(d3dsd));
	if(SUCCEEDED(m_pSurface->GetDesc(&d3dsd))) {
		m_maxsize.SetSize(d3dsd.Width, d3dsd.Height);
		m_rcDirty.SetRect(0, 0, d3dsd.Width, d3dsd.Height);
	}
}

CDX9SubPic::~CDX9SubPic()
{
	{
		CAutoLock Lock(&CDX9SubPicAllocator::ms_SurfaceQueueLock);
		// Add surface to cache
		if (m_pAllocator) {
			for (POSITION pos = m_pAllocator->m_AllocatedSurfaces.GetHeadPosition(); pos; ) {
				POSITION ThisPos = pos;
				CDX9SubPic *pSubPic = m_pAllocator->m_AllocatedSurfaces.GetNext(pos);
				if (pSubPic == this) {
					m_pAllocator->m_AllocatedSurfaces.RemoveAt(ThisPos);
					break;
				}
			}
			m_pAllocator->m_FreeSurfaces.AddTail(m_pSurface);
		}
	}
}


// ISubPic

STDMETHODIMP_(void*) CDX9SubPic::GetObject()
{
	CComPtr<IDirect3DTexture9> pTexture;
	if(SUCCEEDED(m_pSurface->GetContainer(IID_IDirect3DTexture9, (void**)&pTexture))) {
		return (void*)(IDirect3DTexture9*)pTexture;
	}

	return NULL;
}

STDMETHODIMP CDX9SubPic::GetDesc(SubPicDesc& spd)
{
	D3DSURFACE_DESC d3dsd;
	ZeroMemory(&d3dsd, sizeof(d3dsd));
	if(FAILED(m_pSurface->GetDesc(&d3dsd))) {
		return E_FAIL;
	}

	spd.type = 0;
	spd.w = m_size.cx;
	spd.h = m_size.cy;
	spd.bpp =
		d3dsd.Format == D3DFMT_A8R8G8B8 ? 32 :
		d3dsd.Format == D3DFMT_A4R4G4B4 ? 16 : 0;
	spd.pitch = 0;
	spd.bits = NULL;
	spd.vidrect = m_vidrect;

	return S_OK;
}

STDMETHODIMP CDX9SubPic::CopyTo(ISubPic* pSubPic)
{
	HRESULT hr;
	if(FAILED(hr = __super::CopyTo(pSubPic))) {
		return hr;
	}

	if(m_rcDirty.IsRectEmpty()) {
		return S_FALSE;
	}

	CComPtr<IDirect3DDevice9> pD3DDev;
	if(!m_pSurface || FAILED(m_pSurface->GetDevice(&pD3DDev)) || !pD3DDev) {
		return E_FAIL;
	}

	IDirect3DTexture9* pSrcTex = (IDirect3DTexture9*)GetObject();
	CComPtr<IDirect3DSurface9> pSrcSurf;
	pSrcTex->GetSurfaceLevel(0, &pSrcSurf);
	D3DSURFACE_DESC srcDesc;
	pSrcSurf->GetDesc(&srcDesc);

	IDirect3DTexture9* pDstTex = (IDirect3DTexture9*)pSubPic->GetObject();
	CComPtr<IDirect3DSurface9> pDstSurf;
	pDstTex->GetSurfaceLevel(0, &pDstSurf);
	D3DSURFACE_DESC dstDesc;
	pDstSurf->GetDesc(&dstDesc);

	RECT r;
	SetRect(&r, 0, 0, min(srcDesc.Width, dstDesc.Width), min(srcDesc.Height, dstDesc.Height));
	POINT p = { 0, 0 };
	hr = pD3DDev->UpdateSurface(pSrcSurf, &r, pDstSurf, &p);
	//	ASSERT (SUCCEEDED (hr));

	return SUCCEEDED(hr) ? S_OK : E_FAIL;
}

STDMETHODIMP CDX9SubPic::ClearDirtyRect(DWORD color)
{
	if(m_rcDirty.IsRectEmpty()) {
		return S_FALSE;
	}

	CComPtr<IDirect3DDevice9> pD3DDev;
	if(!m_pSurface || FAILED(m_pSurface->GetDevice(&pD3DDev)) || !pD3DDev) {
		return E_FAIL;
	}

	SubPicDesc spd;
	if(SUCCEEDED(Lock(spd))) {
		int h = m_rcDirty.Height();

		BYTE* ptr = (BYTE*)spd.bits + spd.pitch*m_rcDirty.top + (m_rcDirty.left*spd.bpp>>3);

		if(spd.bpp == 16) {
			while(h-- > 0) {
				memsetw(ptr, color, 2 * m_rcDirty.Width());
				ptr += spd.pitch;
			}
		} else if(spd.bpp == 32) {
			while(h-- > 0) {
				memsetd(ptr, color, 4 * m_rcDirty.Width());
				ptr += spd.pitch;
			}
		}
		/*
				DWORD* ptr = (DWORD*)bm.bits;
				DWORD* end = ptr + bm.h*bm.wBytes/4;
				while(ptr < end) *ptr++ = color;
		*/
		Unlock(NULL);
	}

	//		HRESULT hr = pD3DDev->ColorFill(m_pSurface, m_rcDirty, color);

	m_rcDirty.SetRectEmpty();

	return S_OK;
}

STDMETHODIMP CDX9SubPic::Lock(SubPicDesc& spd)
{
	D3DSURFACE_DESC d3dsd;
	ZeroMemory(&d3dsd, sizeof(d3dsd));
	if(FAILED(m_pSurface->GetDesc(&d3dsd))) {
		return E_FAIL;
	}

	D3DLOCKED_RECT LockedRect;
	ZeroMemory(&LockedRect, sizeof(LockedRect));
	if(FAILED(m_pSurface->LockRect(&LockedRect, NULL, D3DLOCK_NO_DIRTY_UPDATE|D3DLOCK_NOSYSLOCK))) {
		return E_FAIL;
	}

	spd.type = 0;
	spd.w = m_size.cx;
	spd.h = m_size.cy;
	spd.bpp =
		d3dsd.Format == D3DFMT_A8R8G8B8 ? 32 :
		d3dsd.Format == D3DFMT_A4R4G4B4 ? 16 : 0;
	spd.pitch = LockedRect.Pitch;
	spd.bits = LockedRect.pBits;
	spd.vidrect = m_vidrect;

	return S_OK;
}

STDMETHODIMP CDX9SubPic::Unlock(RECT* pDirtyRect)
{
	HRESULT hr = m_pSurface->UnlockRect();

	if(pDirtyRect) {
		m_rcDirty = *pDirtyRect;
		if (!((CRect*)pDirtyRect)->IsRectEmpty()) {
			m_rcDirty.InflateRect(1, 1);
			m_rcDirty.left &= ~127;
			m_rcDirty.top &= ~63;
			m_rcDirty.right = (m_rcDirty.right + 127) & ~127;
			m_rcDirty.bottom = (m_rcDirty.bottom + 63) & ~63;
			m_rcDirty &= CRect(CPoint(0, 0), m_size);
		}
	} else {
		m_rcDirty = CRect(CPoint(0, 0), m_size);
	}

	CComPtr<IDirect3DTexture9> pTexture = (IDirect3DTexture9*)GetObject();
	if (pTexture && !((CRect*)pDirtyRect)->IsRectEmpty()) {
		hr = pTexture->AddDirtyRect(&m_rcDirty);
	}

	return S_OK;
}

STDMETHODIMP CDX9SubPic::AlphaBlt(RECT* pSrc, RECT* pDst, SubPicDesc* pTarget)
{
	ASSERT(pTarget == NULL);

	if(!pSrc || !pDst) {
		return E_POINTER;
	}

	CRect src(*pSrc), dst(*pDst);

	CComPtr<IDirect3DDevice9> pD3DDev;
	CComPtr<IDirect3DTexture9> pTexture = (IDirect3DTexture9*)GetObject();
	if(!pTexture || FAILED(pTexture->GetDevice(&pD3DDev)) || !pD3DDev) {
		return E_NOINTERFACE;
	}

	HRESULT hr;

	do {
		D3DSURFACE_DESC d3dsd;
		ZeroMemory(&d3dsd, sizeof(d3dsd));
		if(FAILED(pTexture->GetLevelDesc(0, &d3dsd)) /*|| d3dsd.Type != D3DRTYPE_TEXTURE*/) {
			break;
		}

		float w = (float)d3dsd.Width;
		float h = (float)d3dsd.Height;

		struct {
			float x, y, z, rhw;
			float tu, tv;
		}
		pVertices[] = {
			{(float)dst.left, (float)dst.top, 0.5f, 2.0f, (float)src.left / w, (float)src.top / h},
			{(float)dst.right, (float)dst.top, 0.5f, 2.0f, (float)src.right / w, (float)src.top / h},
			{(float)dst.left, (float)dst.bottom, 0.5f, 2.0f, (float)src.left / w, (float)src.bottom / h},
			{(float)dst.right, (float)dst.bottom, 0.5f, 2.0f, (float)src.right / w, (float)src.bottom / h},
		};

		for(ptrdiff_t i = 0; i < countof(pVertices); i++) {
			pVertices[i].x -= 0.5;
			pVertices[i].y -= 0.5;
		}

		hr = pD3DDev->SetTexture(0, pTexture);

		// GetRenderState fails for devices created with D3DCREATE_PUREDEVICE
		// so we need to provide default values in case GetRenderState fails
		DWORD abe, sb, db;
		if (FAILED(pD3DDev->GetRenderState(D3DRS_ALPHABLENDENABLE, &abe)))
			abe = FALSE;
		if (FAILED(pD3DDev->GetRenderState(D3DRS_SRCBLEND, &sb)))
			sb = D3DBLEND_ONE;
		if (FAILED(pD3DDev->GetRenderState(D3DRS_DESTBLEND, &db)))
			db = D3DBLEND_ZERO;

		hr = pD3DDev->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
		hr = pD3DDev->SetRenderState(D3DRS_LIGHTING, FALSE);
		hr = pD3DDev->SetRenderState(D3DRS_ZENABLE, FALSE);
		hr = pD3DDev->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
		hr = pD3DDev->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE); // pre-multiplied src and ...
		hr = pD3DDev->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_SRCALPHA); // ... inverse alpha channel for dst

		hr = pD3DDev->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
		hr = pD3DDev->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
		hr = pD3DDev->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);

		if(pSrc == pDst) {
			hr = pD3DDev->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_POINT);
			hr = pD3DDev->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_POINT);}
		else {
			hr = pD3DDev->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
			hr = pD3DDev->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);}
		hr = pD3DDev->SetSamplerState(0, D3DSAMP_MIPFILTER, D3DTEXF_NONE);

		hr = pD3DDev->SetSamplerState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_BORDER);
		hr = pD3DDev->SetSamplerState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_BORDER);
		hr = pD3DDev->SetSamplerState(0, D3DSAMP_BORDERCOLOR, 0xFF000000);

		/*//

		D3DCAPS9 d3dcaps9;
		hr = pD3DDev->GetDeviceCaps(&d3dcaps9);
		if(d3dcaps9.AlphaCmpCaps & D3DPCMPCAPS_LESS)
		{
			hr = pD3DDev->SetRenderState(D3DRS_ALPHAREF, (DWORD)0x000000FE);
			hr = pD3DDev->SetRenderState(D3DRS_ALPHATESTENABLE, TRUE);
			hr = pD3DDev->SetRenderState(D3DRS_ALPHAFUNC, D3DPCMPCAPS_LESS);
		}

		*///

		hr = pD3DDev->SetPixelShader(NULL);

		if((m_bExternalRenderer) && (FAILED(hr = pD3DDev->BeginScene())))
			break;

		hr = pD3DDev->SetFVF(D3DFVF_XYZRHW | D3DFVF_TEX1);
		hr = pD3DDev->DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 2, pVertices, sizeof(pVertices[0]));

		if(m_bExternalRenderer)
			hr = pD3DDev->EndScene();

		//

		pD3DDev->SetTexture(0, NULL);

		pD3DDev->SetRenderState(D3DRS_ALPHABLENDENABLE, abe);
		pD3DDev->SetRenderState(D3DRS_SRCBLEND, sb);
		pD3DDev->SetRenderState(D3DRS_DESTBLEND, db);

		return S_OK;
	} while(0);

	return E_FAIL;
}

//
// CDX9SubPicAllocator
//

CDX9SubPicAllocator::CDX9SubPicAllocator(IDirect3DDevice9* pD3DDev, SIZE maxsize, bool fPow2Textures, bool bExternalRenderer)
	: CSubPicAllocatorImpl(maxsize, true, fPow2Textures)
	, m_pD3DDev(pD3DDev)
	, m_maxsize(maxsize)
	, m_bExternalRenderer(bExternalRenderer)
{
}

CCritSec CDX9SubPicAllocator::ms_SurfaceQueueLock;


CDX9SubPicAllocator::~CDX9SubPicAllocator()
{
	ClearCache();
}


void CDX9SubPicAllocator::GetStats(int &_nFree, int &_nAlloc)
{
	CAutoLock Lock(&ms_SurfaceQueueLock);
	_nFree = m_FreeSurfaces.GetCount();
	_nAlloc = m_AllocatedSurfaces.GetCount();
}

void CDX9SubPicAllocator::ClearCache()
{
	{
		// Clear the allocator of any remaining subpics
		CAutoLock Lock(&ms_SurfaceQueueLock);
		for (POSITION pos = m_AllocatedSurfaces.GetHeadPosition(); pos; ) {
			CDX9SubPic *pSubPic = m_AllocatedSurfaces.GetNext(pos);
			pSubPic->m_pAllocator = NULL;
		}
		m_AllocatedSurfaces.RemoveAll();
		m_FreeSurfaces.RemoveAll();
	}
}

// ISubPicAllocator

STDMETHODIMP CDX9SubPicAllocator::ChangeDevice(IUnknown* pDev)
{
	ClearCache();
	CComQIPtr<IDirect3DDevice9> pD3DDev = pDev;
	if(!pD3DDev) {
		return E_NOINTERFACE;
	}

	CAutoLock cAutoLock(this);
	m_pD3DDev = pD3DDev;

	return __super::ChangeDevice(pDev);
}

STDMETHODIMP CDX9SubPicAllocator::SetMaxTextureSize(SIZE MaxTextureSize)
{
	ClearCache();
	m_maxsize	= MaxTextureSize;
	SetCurSize(MaxTextureSize);
	return S_OK;
}

// ISubPicAllocatorImpl

bool CDX9SubPicAllocator::Alloc(bool fStatic, ISubPic** ppSubPic)
{
	if(!ppSubPic) {
		return(false);
	}

	CAutoLock cAutoLock(this);

	*ppSubPic = NULL;

	CComPtr<IDirect3DSurface9> pSurface;

	int Width = m_maxsize.cx;
	int Height = m_maxsize.cy;

	if(m_fPow2Textures) {
		Width = Height = 1;
		while(Width < m_maxsize.cx) {
			Width <<= 1;
		}
		while(Height < m_maxsize.cy) {
			Height <<= 1;
		}
	}
	if (!fStatic) {
		CAutoLock cAutoLock(&ms_SurfaceQueueLock);
		POSITION FreeSurf = m_FreeSurfaces.GetHeadPosition();
		if (FreeSurf) {
			pSurface = m_FreeSurfaces.GetHead();
			m_FreeSurfaces.RemoveHead();
		}
	}

	if (!pSurface) {
		CComPtr<IDirect3DTexture9> pTexture;
		if(FAILED(m_pD3DDev->CreateTexture(Width, Height, 1, 0, D3DFMT_A8R8G8B8, fStatic?D3DPOOL_SYSTEMMEM:D3DPOOL_DEFAULT, &pTexture, NULL))) {
			return(false);
		}

		if(FAILED(pTexture->GetSurfaceLevel(0, &pSurface))) {
			return(false);
		}
	}

	*ppSubPic = DNew CDX9SubPic(pSurface, fStatic ? 0 : this, m_bExternalRenderer);
	if(!(*ppSubPic)) {
		return(false);
	}

	(*ppSubPic)->AddRef();

	if (!fStatic) {
		CAutoLock cAutoLock(&ms_SurfaceQueueLock);
		m_AllocatedSurfaces.AddHead((CDX9SubPic *)*ppSubPic);
	}

	return(true);
}