/* 
 *	Copyright (C) 2003-2006 Gabest
 *	http://www.gabest.org
 *
 *  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)
	: m_pSurface(pSurface)
{
	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);
	}
}

// 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;

	hr = pD3DDev->UpdateTexture((IDirect3DTexture9*)GetObject(), (IDirect3DTexture9*)pSubPic->GetObject());

	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)
			{
				WORD* start = (WORD*)ptr;
				WORD* end = start + m_rcDirty.Width();
				while(start < end) *start++ = (WORD)color;
				ptr += spd.pitch;
			}
		}
		else if(spd.bpp == 32)
		{
			while(h-- > 0)
			{
				DWORD* start = (DWORD*)ptr;
				DWORD* end = start + m_rcDirty.Width();
				while(start < end) *start++ = color;
				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, 0)))
		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)
{
	m_pSurface->UnlockRect();

	if(pDirtyRect)
	{
		m_rcDirty = *pDirtyRect;
		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);
	}

	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(int i = 0; i < countof(pVertices); i++)
		{
			pVertices[i].x -= 0.5;
			pVertices[i].y -= 0.5;
		}
*/

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

		DWORD abe, sb, db;
		hr = pD3DDev->GetRenderState(D3DRS_ALPHABLENDENABLE, &abe);
		hr = pD3DDev->GetRenderState(D3DRS_SRCBLEND, &sb);
		hr = pD3DDev->GetRenderState(D3DRS_DESTBLEND, &db);

        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);

        hr = pD3DDev->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
        hr = pD3DDev->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
        hr = pD3DDev->SetSamplerState(0, D3DSAMP_MIPFILTER, D3DTEXF_LINEAR);

		hr = pD3DDev->SetSamplerState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_CLAMP);
		hr = pD3DDev->SetSamplerState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_CLAMP);

		/*//

		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(FAILED(hr = pD3DDev->BeginScene()))
			break;

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

		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) 
	: ISubPicAllocatorImpl(maxsize, true, fPow2Textures)
	, m_pD3DDev(pD3DDev)
	, m_maxsize(maxsize)
{
	m_pD3DDev = pD3DDev;
	m_maxsize = maxsize;
}

// ISubPicAllocator

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

	CAutoLock cAutoLock(this);
	m_pD3DDev = pD3DDev;

	return __super::ChangeDevice(pDev);
}

// 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;
	}

	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);

	if(!(*ppSubPic = new CDX9SubPic(pSurface)))
		return(false);

	(*ppSubPic)->AddRef();

	return(true);
}