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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <config_cairo_canvas.h>
#if ENABLE_CAIRO_CANVAS
/************************************************************************
* Win32 surface backend for LibreOffice Cairo Canvas *
************************************************************************/
#include <osl/diagnose.h>
#include <vcl/bitmap.hxx>
#include <vcl/virdev.hxx>
#include <vcl/sysdata.hxx>
#include "cairo_win32_cairo.hxx"
namespace cairo
{
#include <cairo-win32.h>
/**
* Surface::Surface: Create generic Canvas surface using given Cairo Surface
*
* @param pSurface Cairo Surface
*
* This constructor only stores data, it does no processing.
* It is used with e.g. cairo_image_surface_create_for_data()
* and Surface::getSimilar()
*
* Set the mpSurface to the new surface or NULL
**/
Win32Surface::Win32Surface( const CairoSurfaceSharedPtr& pSurface ) :
mpSurface( pSurface )
{}
/**
* Surface::Surface: Create Canvas surface from Window reference.
* @param pSysData Platform native system environment data (struct SystemEnvData in vcl/inc/sysdata.hxx)
* @param x horizontal location of the new surface
* @param y vertical location of the new surface
*
* pSysData contains the platform native Window reference.
* pSysData is used to create a surface on the Window
*
* Set the mpSurface to the new surface or NULL
**/
Win32Surface::Win32Surface( HDC hDC, int x, int y) :
mpSurface(
cairo_win32_surface_create(hDC),
&cairo_surface_destroy)
{
cairo_surface_set_device_offset( mpSurface.get(), x, y );
}
/**
* Surface::Surface: Create platform native Canvas surface from BitmapSystemData
* @param pBmpData Platform native image data (struct BitmapSystemData in vcl/inc/bitmap.hxx)
*
* Create a surface based on image data on pBmpData
*
* Set the mpSurface to the new surface or NULL
**/
Win32Surface::Win32Surface( const BitmapSystemData& rBmpData ) :
mpSurface()
{
OSL_ASSERT(rBmpData.pDIB == NULL);
if(rBmpData.pDIB != NULL)
{
// So just leave mpSurface to NULL, little else we can do at
// this stage. Hopefully the Win32 patch to
// cairocanvas::DeviceHelper::getSurface(BitmapSystemData&,
// const Size&) will catch the cases where this
// constructor would be called with a DIB bitmap, and we
// will never get here. At least it worked for Ballmer.ppt.
}
else
{
HDC hDC = CreateCompatibleDC(NULL);
void* hOrigBitmap;
OSL_TRACE ("Surface::Surface(): Selecting bitmap %p into DC %p", rBmpData.pDDB, hDC);
hOrigBitmap = SelectObject( hDC, (HANDLE)rBmpData.pDDB );
if(hOrigBitmap == NULL)
OSL_TRACE ("SelectObject failed: %d", GetLastError ());
mpSurface.reset(
cairo_win32_surface_create(hDC),
&cairo_surface_destroy);
}
}
/**
* Surface::getCairo: Create Cairo (drawing object) for the Canvas surface
*
* @return new Cairo or NULL
**/
CairoSharedPtr Win32Surface::getCairo() const
{
return CairoSharedPtr( cairo_create(mpSurface.get()),
&cairo_destroy );
}
/**
* Surface::getSimilar: Create new similar Canvas surface
* @param aContent format of the new surface (cairo_content_t from cairo/src/cairo.h)
* @param width width of the new surface
* @param height height of the new surface
*
* Creates a new Canvas surface. This normally creates platform native surface, even though
* generic function is used.
*
* Cairo surface from aContent (cairo_content_t)
*
* @return new surface or NULL
**/
SurfaceSharedPtr Win32Surface::getSimilar( int aContent, int width, int height ) const
{
return SurfaceSharedPtr(
new Win32Surface(
CairoSurfaceSharedPtr(
cairo_surface_create_similar( mpSurface.get(), aContent, width, height ),
&cairo_surface_destroy )));
}
void Win32Surface::flush() const
{
GdiFlush();
}
/**
* Surface::getDepth: Get the color depth of the Canvas surface.
*
* @return color depth
**/
int Win32Surface::getDepth() const
{
if (mpSurface)
{
switch (cairo_surface_get_content (mpSurface.get()))
{
case CAIRO_CONTENT_ALPHA: return 8; break;
case CAIRO_CONTENT_COLOR: return 24; break;
case CAIRO_CONTENT_COLOR_ALPHA: return 32; break;
}
}
OSL_TRACE("Canvas::cairo::Surface::getDepth(): ERROR - depth unspecified!");
return -1;
}
/**
* cairo::createVirtualDevice: Create a VCL virtual device for the CGContext in the cairo Surface
*
* @return The new virtual device
**/
VclPtr<VirtualDevice> Win32Surface::createVirtualDevice() const
{
SystemGraphicsData aSystemGraphicsData;
aSystemGraphicsData.nSize = sizeof( SystemGraphicsData );
aSystemGraphicsData.hDC = cairo_win32_surface_get_dc( mpSurface.get() );
return VclPtr<VirtualDevice>::Create( &aSystemGraphicsData, Size(1, 1), sal::static_int_cast<USHORT>( getDepth() ) );
}
} // namespace cairo
#endif // #ENABLE_CAIRO_CANVAS
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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