netsurf/cocoa/thumbnail.m

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/*
* Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import <Cocoa/Cocoa.h>
#import "desktop/browser.h"
#import "desktop/plotters.h"
#import "desktop/thumbnail.h"
#import "content/urldb.h"
#import "cocoa/plotter.h"
#import "image/bitmap.h"
/* In platform specific thumbnail.c. */
bool thumbnail_create(struct hlcache_handle *content, struct bitmap *bitmap,
const char *url)
{
int bwidth = bitmap_get_width( bitmap );
int bheight = bitmap_get_height( bitmap );
struct redraw_context ctx = {
.interactive = false,
.plot = &cocoa_plotters
};
CGColorSpaceRef cspace = CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB );
CGContextRef bitmapContext = CGBitmapContextCreate( bitmap_get_buffer( bitmap ),
bwidth, bheight,
bitmap_get_bpp( bitmap ) * 8 / 4,
bitmap_get_rowstride( bitmap ),
cspace, kCGImageAlphaNoneSkipLast );
CGColorSpaceRelease( cspace );
size_t width = MIN( content_get_width( content ), 1024 );
size_t height = ((width * bheight) + bwidth / 2) / bwidth;
CGContextTranslateCTM( bitmapContext, 0, bheight );
CGContextScaleCTM( bitmapContext, (CGFloat)bwidth / width, -(CGFloat)bheight / height );
[NSGraphicsContext setCurrentContext: [NSGraphicsContext graphicsContextWithGraphicsPort: bitmapContext flipped: YES]];
thumbnail_redraw( content, width, height, &ctx );
[NSGraphicsContext setCurrentContext: nil];
CGContextRelease( bitmapContext );
bitmap_modified( bitmap );
if (NULL != url) urldb_set_thumbnail( url, bitmap );
return true;
}