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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
/************************************************************************
* Mac OS X/Quartz and iOS surface backend for LibreOffice Cairo Canvas *
************************************************************************/
#include <osl/diagnose.h>
#include <vcl/sysdata.hxx>
#include <vcl/bitmap.hxx>
#include <vcl/virdev.hxx>
#include "cairo_cairo.hxx"
#include <config_cairo_canvas.h>
#include "cairo_quartz_cairo.hxx"
namespace cairo
{
/**
* QuartzSurface::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 QuartzSurface::getSimilar()
*
* Set the mpSurface to the new surface or NULL
**/
QuartzSurface::QuartzSurface( const CairoSurfaceSharedPtr& pSurface ) :
mpView(NULL),
mpSurface( pSurface )
{
// Necessary, context is lost otherwise
CGContextRetain( getCGContext() ); // == NULL for non-native surfaces
}
/**
* QuartzSurface::Surface: Create Canvas surface from Window reference.
* @param NSView
* @param x horizontal location of the new surface
* @param y vertical location of the new surface
* @param width width of the new surface
* @param height height 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
**/
QuartzSurface::QuartzSurface( NSView* pView, int x, int y, int width, int height ) :
mpView(pView),
mpSurface()
{
OSL_TRACE("Canvas::cairo::Surface(NSView*, x:%d, y:%d, w:%d, h:%d): New Surface for window", x, y, width, height);
// on Mac OS X / Quartz we are not drawing directly to the screen, but via regular CGContextRef.
// The actual drawing to NSView (i.e. screen) is done in QuartzSurface::flush()
// HACK: currently initial size for windowsurface is 0x0, which is not possible for us.
if (width == 0 || height == 0) {
width = [mpView bounds].size.width;
height = [mpView bounds].size.height;
OSL_TRACE("Canvas::cairo::Surface(): BUG!! size is ZERO! fixing to %d x %d...", width, height);
}
// create a generic surface, NSView/Window is ARGB32.
mpSurface.reset(
cairo_quartz_surface_create(CAIRO_FORMAT_ARGB32, width, height),
&cairo_surface_destroy);
cairo_surface_set_device_offset( mpSurface.get(), x, y );
}
/**
* QuartzSurface::Surface: Create Canvas surface from CGContextRef.
* @param CGContext Native graphics context
* @param x horizontal location of the new surface
* @param y vertical location of the new surface
* @param width width of the new surface
* @param height height of the new surface
*
* Set the mpSurface to the new surface or NULL
**/
QuartzSurface::QuartzSurface( CGContextRef rContext, int x, int y, int width, int height ) :
mpView(NULL),
mpSurface()
{
OSL_TRACE("Canvas::cairo::Surface(CGContext:%p, x:%d, y:%d, w:%d, h:%d): New Surface.", rContext, x, y, width, height);
// create surface based on CGContext
// ensure kCGBitmapByteOrder32Host flag, otherwise Cairo breaks (we are practically always using CGBitmapContext)
OSL_ASSERT ((CGBitmapContextGetBitsPerPixel(rContext) != 32) ||
(CGBitmapContextGetBitmapInfo(rContext) & kCGBitmapByteOrderMask) == kCGBitmapByteOrder32Host);
mpSurface.reset(cairo_quartz_surface_create_for_cg_context(rContext, width, height),
&cairo_surface_destroy);
cairo_surface_set_device_offset( mpSurface.get(), x, y );
// Necessary, context is lost otherwise
CGContextRetain(rContext);
}
/**
* QuartzSurface::getCairo: Create Cairo (drawing object) for the Canvas surface
*
* @return new Cairo or NULL
**/
CairoSharedPtr QuartzSurface::getCairo() const
{
if (mpSurface.get())
{
return CairoSharedPtr( cairo_create(mpSurface.get()),
&cairo_destroy );
}
else
{
return CairoSharedPtr();
}
}
/**
* QuartzSurface::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 QuartzSurface::getSimilar( Content aContent, int width, int height ) const
{
return SurfaceSharedPtr(
new QuartzSurface(
CairoSurfaceSharedPtr(
cairo_surface_create_similar( mpSurface.get(), aContent, width, height ),
&cairo_surface_destroy )));
}
/**
* QuartzSurface::flush: Draw the data to screen
**/
void QuartzSurface::flush() const
{
// can only flush surfaces with NSView
if( !mpView )
return;
OSL_TRACE("Canvas::cairo::QuartzSurface::flush(): flush to NSView");
CGContextRef mrContext = getCGContext();
if (!mrContext)
return;
#ifndef IOS
[mpView lockFocus];
#endif
#ifndef IOS
/**
* This code is using same screen update code as in VCL (esp. AquaSalGraphics::UpdateWindow() )
*/
CGContextRef rViewContext = reinterpret_cast<CGContextRef>([[NSGraphicsContext currentContext] graphicsPort]);
#else
// Just guessing for now...
CGContextRef rViewContext = UIGraphicsGetCurrentContext();
#endif
CGImageRef xImage = CGBitmapContextCreateImage(mrContext);
CGContextDrawImage(rViewContext,
CGRectMake( 0, 0,
CGImageGetWidth(xImage),
CGImageGetHeight(xImage)),
xImage);
CGImageRelease( xImage );
CGContextFlush( rViewContext );
#ifndef IOS
[mpView unlockFocus];
#endif
}
/**
* QuartzSurface::getDepth: Get the color depth of the Canvas surface.
*
* @return color depth
**/
int QuartzSurface::getDepth() const
{
if (mpSurface.get())
{
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::QuartzSurface::getDepth(): ERROR - depth unspecified!");
return -1;
}
/**
* QuartzSurface::getCGContext: Get the native CGContextRef of the Canvas's cairo surface
*
* @return graphics context
**/
CGContextRef QuartzSurface::getCGContext() const
{
if (mpSurface.get())
return cairo_quartz_surface_get_cg_context(mpSurface.get());
else
return NULL;
}
/**
* cairo::createVirtualDevice: Create a VCL virtual device for the CGContext in the cairo Surface
*
* @return The new virtual device
**/
VclPtr<VirtualDevice> QuartzSurface::createVirtualDevice() const
{
SystemGraphicsData aSystemGraphicsData;
aSystemGraphicsData.nSize = sizeof(SystemGraphicsData);
aSystemGraphicsData.rCGContext = getCGContext();
return VclPtr<VirtualDevice>(
VclPtr<VirtualDevice>::Create( &aSystemGraphicsData, Size(1, 1), getDepth() ));
}
} // namespace cairo
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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