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/****************************************************************************
**
** Copyright (C) 2016 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "Qt3DSCommonPrecompile.h"
#include "BufferedRenderer.h"
#include "AppFonts.h"
//=============================================================================
/**
* Create a buffered renderer.
* @param inSize the size of this renderer.
*/
CBufferedRenderer::CBufferedRenderer(const QSize &inSize)
: CWinRenderer()
{
m_CurrentBitmap = QPixmap(inSize);
// KDAB_TODO: I don't see why m_OldBitmap is needed, nor what is the difference between CBufferedRenderer and COffscreenRenderer
m_OldBitmap = m_CurrentBitmap;
m_painter = new QPainter(&m_CurrentBitmap);
QFont font = CAppFonts::GetInstance()->GetNormalFont();
m_painter->setFont(font);
m_Size = inSize;
PushClippingRect(QRect(QPoint(0,0), inSize));
}
//=============================================================================
/**
* Destructor
*/
CBufferedRenderer::~CBufferedRenderer()
{
delete m_painter;
m_painter = nullptr;
}
//=============================================================================
/**
* Copy this BufferedRenderer to inRenderer using alpha blend.
* This will semi-transparently copy the contents of this buffer to inRenderer
* using the alpha.
* @param inRenderer the destination renderer.
* @param inAlpha the opacity, 255 = opaque 0 = transparent.
*/
/*void CBufferedRenderer::TransparentBltTo( CRenderer* inRenderer, short inAlpha )
{
CPt theDestination;
theDestination.Offset( inRenderer->GetTranslation( ) );
AlphaBlendExt( inRenderer->GetGraphicsDevice( )->m_hDC, (short)theDestination.x,
(short)theDestination.y, (short)m_Size.x, (short)m_Size.y, m_DC->m_hDC, 0, 0, (short)m_Size.x,
(short)m_Size.y, inAlpha );
// ::DrawAlphaBlendBitmap( inRenderer->GetDC( ), (short)theDestination.x,
(short)theDestination.y, m_CurrentBitmap, (short)m_Size.x, (short)m_Size.y, 0, 0, inAlpha );
}*/
//==============================================================================
/**
* Draws a bitmap using alpha blending. Works in NT/2000/9x
*
* @param inDCDest Destination device context
* @param inX X coordinate for drawing
* @param inY Y coordinate for drawing
* @param inWidth Drawing width
* @param inHeight Drawing height
* @param inDCSrc Source device context
* @param inSourceX X source coordinate
* @param inSourceY Y source coordinate
* @param inSourceWidth Source drawing width
* @param inSourceHeight Source drawing height
* @param inAlpha Alpha blend: 0-255, where 255 is opaque
*/
//==============================================================================
/*bool CBufferedRenderer::AlphaBlendExt( HDC inDCDest, short inX, short inY, short inWidth, short
inHeight, HDC inDCSrc, short inSourceX, short inSourceY, short inSourceWidth, short inSourceHeight,
short inAlpha )
{
BITMAPINFOHEADER theBMI;
theBMI.biSize = sizeof( BITMAPINFOHEADER );
theBMI.biWidth = inWidth;
theBMI.biHeight = inHeight;
theBMI.biPlanes = 1;
theBMI.biBitCount = 32; // 24 bits + alpha channel
theBMI.biCompression = BI_RGB; // no compression
theBMI.biSizeImage = 0;
theBMI.biXPelsPerMeter = 0;
theBMI.biYPelsPerMeter = 0;
theBMI.biClrUsed = 0; // use the whole palette
theBMI.biClrImportant = 0;
BYTE* theSrcBits;
HBITMAP theBmpSrc;
// Create DIB section in shared memory
theBmpSrc = CreateDIBSection( inDCSrc, ( BITMAPINFO* ) &theBMI, DIB_RGB_COLORS, ( void** )
&theSrcBits, 0, 0L );
BYTE* theDestBits;
HBITMAP theBmpDest;
// Create DIB section in shared memory
theBmpDest = CreateDIBSection( inDCDest, ( BITMAPINFO* ) &theBMI, DIB_RGB_COLORS, ( void** )
&theDestBits, 0, 0L );
// Copy our source and destination bitmaps onto our DIBSections.
// so we can get access to their bits using the BYTE*'s we used
// in the CreateDIBSection()s above.
HDC theDC = CreateCompatibleDC( nullptr );
HBITMAP theDCOld = ( HBITMAP ) SelectObject( theDC, theBmpSrc );
if ( !StretchBlt( theDC, 0, 0, inWidth, inHeight, inDCSrc, inSourceX, inSourceY,
inSourceWidth, inSourceHeight, SRCCOPY ) )
{
SelectObject( theDC, theDCOld );
DeleteDC( theDC );
DeleteObject( theBmpSrc );
DeleteObject( theBmpDest );
return false;
}
SelectObject( theDC, theBmpDest );
if (! StretchBlt( theDC, 0, 0, inWidth, inHeight, inDCDest, inX, inY, inWidth, inHeight,
SRCCOPY ) )
{
SelectObject( theDC, theDCOld );
DeleteDC( theDC );
DeleteObject( theBmpSrc );
DeleteObject( theBmpDest );
return true;
}
SelectObject( theDC, theDCOld );
DeleteDC( theDC );
short theXLoop, theYLoop;
for( theYLoop=0; theYLoop<inHeight; ++theYLoop )
{
LPBYTE theDestRGB = ( LPBYTE ) &( ( DWORD* ) theDestBits)[theYLoop * inWidth];
LPBYTE theSrcRGB = ( LPBYTE ) &( ( DWORD* ) theSrcBits)[theYLoop * inWidth];
for( theXLoop=0; theXLoop<inWidth; theXLoop++ )
{
theSrcRGB[0] = ( BYTE ) ( ( theDestRGB[0] * ( 255 - inAlpha ) + theSrcRGB[0]
* inAlpha ) >> 8 );
theSrcRGB[1] = ( BYTE ) ( ( theDestRGB[1] * ( 255 - inAlpha ) + theSrcRGB[1]
* inAlpha ) >> 8 );
theSrcRGB[2] = ( BYTE ) ( ( theDestRGB[2] * ( 255 - inAlpha ) + theSrcRGB[2]
* inAlpha ) >> 8 );
theSrcRGB += 4;
theDestRGB += 4;
}
}
theDC = CreateCompatibleDC( nullptr );
theDCOld = ( HBITMAP ) SelectObject( theDC, theBmpSrc );
if ( !BitBlt( inDCDest, inX, inY, inWidth, inHeight, theDC, 0, 0, SRCCOPY ) )
{
SelectObject( theDC, theDCOld );
DeleteDC( theDC );
DeleteObject( theBmpSrc );
DeleteObject( theBmpDest );
return false;
}
SelectObject( theDC, theDCOld );
DeleteDC( theDC );
DeleteObject( theBmpSrc );
DeleteObject( theBmpDest );
return true;
}*/
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