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/*
* Copyright (C) 2004 Stefan Kleine Stegemann
*
* 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
* of the License, 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#import "PopplerDirectBufferedRenderer.h"
#import "PopplerDocument+Rendering.h"
/**
* Non-Public methods.
*/
@interface PopplerDirectBufferedRenderer (Private)
- (BOOL) _cachedImageMatchesPage: (PopplerPage*)aPage
srcBox: (NSRect)aBox
scale: (float)aScale;
- (void) _cacheImage: (NSImageRep*)anImage
forPage: (PopplerPage*)aPage
srcBox: (NSRect)aBox
scale: (float)aScale;
- (NSImageRep*) _cachedImage;
@end
@implementation PopplerDirectBufferedRenderer
- (id) initWithDocument: (PopplerDocument*)aDocument
{
return [self initWithRenderer: [aDocument bufferedRenderer]];
}
- (id) initWithRenderer: (id<PopplerBufferedRenderer>)aRenderer
{
NSAssert(aRenderer, @"no renderer");
self = [super init];
if (self)
{
bufferedRenderer = [(NSObject*)aRenderer retain];
lastImage = nil;
lastPageIndex = 0;
lastScale = 0.0;
lastSrcBox = NSZeroRect;
}
return self;
}
- (void) dealloc
{
[lastImage release];
[(NSObject*)bufferedRenderer release];
[super dealloc];
}
- (void) drawPage: (PopplerPage*)aPage
srcBox: (NSRect)aBox
atPoint: (NSPoint)aPoint
scale: (float)aScale
{
NSAssert(aPage, @"no page");
NSImageRep* image;
if ([self _cachedImageMatchesPage: aPage srcBox: aBox scale: aScale])
{
image = [self _cachedImage];
}
else
{
image = [bufferedRenderer renderPage: aPage srcBox: aBox scale: aScale];
[self _cacheImage: image forPage: aPage srcBox: aBox scale: aScale];
}
NSAssert(image, @"no image");
[image drawAtPoint: aPoint];
// DEBUG:
//NSData* tiffData = nil;
//tiffData = [image TIFFRepresentation];
//[tiffData writeToFile: @"/Users/stefan/last-rendered.tiff" atomically: NO];
}
- (void) drawPage: (PopplerPage*)aPage
atPoint: (NSPoint)aPoint
scale: (float)aScale
{
[self drawPage: aPage
srcBox: NSMakeRect(-1, -1, -1, -1)
atPoint: aPoint
scale: aScale];
}
@end
/* ----------------------------------------------------- */
/* Category Private */
/* ----------------------------------------------------- */
@implementation PopplerDirectBufferedRenderer (Private)
- (BOOL) _cachedImageMatchesPage: (PopplerPage*)aPage
srcBox: (NSRect)aBox
scale: (float)aScale
{
NSAssert(aPage, @"nil page");
if (!lastImage)
{
return NO;
}
return NSEqualRects(lastSrcBox, aBox) &&
(lastScale == aScale) &&
([aPage index] == lastPageIndex);
}
- (void) _cacheImage: (NSImageRep*)anImage
forPage: (PopplerPage*)aPage
srcBox: (NSRect)aBox
scale: (float)aScale
{
NSAssert(aPage, @"nil page");
[lastImage release];
lastImage = [anImage retain];
lastPageIndex = [aPage index];
lastSrcBox = aBox;
lastScale = aScale;
}
- (NSImageRep*) _cachedImage
{
return lastImage;
}
@end
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