mirror of
https://github.com/gnustep/libs-gui.git
synced 2025-05-30 17:40:36 +00:00
Fixed many drawing issues (many ones being related to the flipping).
See bug report #27782 In particular, fixed -[NSImage drawXXX] and -[NSImage composite/dissolveXXX] methods to work exactly as Cocoa when the Cairo backend is used. Added a new draw operator (in addition to composite) to the backend. Cairo is the only backend that implements it for now. Eliminated as many flipping checks as possible. Warning: Untested with the winlib backend. You must update, recompile and install both Back and Gui. git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@30523 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
qmathe
parent
67adeb4133
commit
0eee79f7b5
9 changed files with 274 additions and 28 deletions
182
Source/NSImage.m
182
Source/NSImage.m
|
|
@ -797,7 +797,6 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
|
|||
return _color;
|
||||
}
|
||||
|
||||
|
||||
// Using the Image
|
||||
- (void) compositeToPoint: (NSPoint)aPoint
|
||||
operation: (NSCompositingOperation)op
|
||||
|
|
@ -813,8 +812,8 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
|
|||
fromRect: (NSRect)aRect
|
||||
operation: (NSCompositingOperation)op
|
||||
{
|
||||
[self compositeToPoint: aPoint
|
||||
fromRect: aRect
|
||||
[self compositeToPoint: aPoint
|
||||
fromRect: aRect
|
||||
operation: op
|
||||
fraction: 1.0];
|
||||
}
|
||||
|
|
@ -850,27 +849,27 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
|
|||
|
||||
if (cache != nil)
|
||||
{
|
||||
NSGraphicsContext *ctxt = GSCurrentContext();
|
||||
NSRect rect = [cache rect];
|
||||
|
||||
NSDebugLLog(@"NSImage", @"composite rect %@ in %@",
|
||||
NSStringFromRect(rect), NSStringFromRect(srcRect));
|
||||
|
||||
// Move the drawing rectangle to the origin of the image rep
|
||||
// and intersect the two rects.
|
||||
srcRect.origin.x += rect.origin.x;
|
||||
srcRect.origin.y += rect.origin.y;
|
||||
rect = NSIntersectionRect(srcRect, rect);
|
||||
|
||||
[GSCurrentContext() GScomposite: [[cache window] gState]
|
||||
toPoint: aPoint
|
||||
fromRect: rect
|
||||
operation: op
|
||||
fraction: delta];
|
||||
[ctxt GScomposite: [[cache window] gState]
|
||||
toPoint: aPoint
|
||||
fromRect: rect
|
||||
operation: op
|
||||
fraction: delta];
|
||||
}
|
||||
else
|
||||
{
|
||||
NSRect rect;
|
||||
|
||||
rect = NSMakeRect(aPoint.x, aPoint.y, _size.width, _size.height);
|
||||
NSRect rect = NSMakeRect(aPoint.x, aPoint.y, _size.width, _size.height);
|
||||
[self drawRepresentation: rep inRect: rect];
|
||||
}
|
||||
}
|
||||
|
|
@ -922,9 +921,6 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
|
|||
{
|
||||
NSRect fillrect = aRect;
|
||||
|
||||
if ([[NSView focusView] isFlipped])
|
||||
fillrect.origin.y -= _size.height;
|
||||
|
||||
[_color set];
|
||||
NSRectFill(fillrect);
|
||||
|
||||
|
|
@ -957,10 +953,145 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
|
|||
fraction: delta];
|
||||
}
|
||||
|
||||
- (void) drawInRect: (NSRect)dstRect
|
||||
fromRect: (NSRect)srcRect
|
||||
operation: (NSCompositingOperation)op
|
||||
fraction: (float)delta
|
||||
/* New code path that delegates as much as possible to the backend and whose
|
||||
behavior precisely matches Cocoa. */
|
||||
- (void) nativeDrawInRect: (NSRect)dstRect
|
||||
fromRect: (NSRect)srcRect
|
||||
operation: (NSCompositingOperation)op
|
||||
fraction: (float)delta
|
||||
{
|
||||
NSGraphicsContext *ctxt = GSCurrentContext();
|
||||
NSSize imgSize = [self size];
|
||||
float widthScaleFactor;
|
||||
float heightScaleFactor;
|
||||
|
||||
if (NSEqualRects(srcRect, NSZeroRect))
|
||||
{
|
||||
srcRect.size = imgSize;
|
||||
/* For -drawAtPoint:fromRect:operation:fraction: used with a zero rect */
|
||||
if (NSEqualSizes(dstRect.size, NSZeroSize))
|
||||
{
|
||||
dstRect.size = imgSize;
|
||||
}
|
||||
}
|
||||
|
||||
if (!dstRect.size.width || !dstRect.size.height
|
||||
|| !srcRect.size.width || !srcRect.size.height)
|
||||
return;
|
||||
|
||||
// Clip to image bounds
|
||||
if (srcRect.origin.x < 0)
|
||||
srcRect.origin.x = 0;
|
||||
if (srcRect.origin.y < 0)
|
||||
srcRect.origin.y = 0;
|
||||
if (NSMaxX(srcRect) > imgSize.width)
|
||||
srcRect.size.width = imgSize.width - srcRect.origin.x;
|
||||
if (NSMaxY(srcRect) > imgSize.height)
|
||||
srcRect.size.height = imgSize.height - srcRect.origin.y;
|
||||
|
||||
widthScaleFactor = dstRect.size.width / srcRect.size.width;
|
||||
heightScaleFactor = dstRect.size.height / srcRect.size.height;
|
||||
|
||||
if (![ctxt isDrawingToScreen])
|
||||
{
|
||||
/* We can't composite or dissolve if we aren't drawing to a screen,
|
||||
so we'll just draw the right part of the image in the right
|
||||
place. */
|
||||
NSPoint p;
|
||||
|
||||
p.x = dstRect.origin.x / widthScaleFactor - srcRect.origin.x;
|
||||
p.y = dstRect.origin.y / heightScaleFactor - srcRect.origin.y;
|
||||
|
||||
DPSgsave(ctxt);
|
||||
DPSrectclip(ctxt, dstRect.origin.x, dstRect.origin.y,
|
||||
dstRect.size.width, dstRect.size.height);
|
||||
DPSscale(ctxt, widthScaleFactor, heightScaleFactor);
|
||||
[self drawRepresentation: [self bestRepresentationForDevice: nil]
|
||||
inRect: NSMakeRect(p.x, p.y, imgSize.width, imgSize.height)];
|
||||
DPSgrestore(ctxt);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
/* We cannot ask the backend to draw the image directly when the source rect
|
||||
doesn't cover the whole image.
|
||||
Cairo doesn't support to specify a source rect for a surface used as a
|
||||
source, see cairo_set_source_surface()).
|
||||
CoreGraphics is similarly limited, see CGContextDrawImage().
|
||||
For now, we always use a two step process:
|
||||
- draw the image data in a cache to apply the srcRect to inRect scaling
|
||||
- draw the cache into the destination context
|
||||
It might be worth to move the first step to the backend, so we don't have
|
||||
to create a cache window but just an intermediate surface.
|
||||
We create a cache every time but otherwise we are more efficient than the
|
||||
old code path since the cache size is limited to what we actually draw
|
||||
and doesn't involve drawing the whole image. */
|
||||
{
|
||||
/* An intermediate image used to scale the image to be drawn as needed */
|
||||
NSCachedImageRep *cache;
|
||||
/* The scaled image graphics state we used as the source from which we
|
||||
draw into the destination (the current graphics context)*/
|
||||
int gState;
|
||||
/* The context of the cache window */
|
||||
NSGraphicsContext *cacheCtxt;
|
||||
/* The size of the cache window that will hold the scaled image */
|
||||
NSSize cacheSize = NSMakeSize(imgSize.width * widthScaleFactor,
|
||||
imgSize.height * heightScaleFactor);
|
||||
NSRect srcRectInCache = NSMakeRect(srcRect.origin.x * widthScaleFactor,
|
||||
srcRect.origin.y * heightScaleFactor,
|
||||
srcRect.size.width * widthScaleFactor,
|
||||
srcRect.size.height * heightScaleFactor);
|
||||
|
||||
cache = [[NSCachedImageRep alloc]
|
||||
initWithSize: cacheSize
|
||||
depth: [[NSScreen mainScreen] depth]
|
||||
separate: YES
|
||||
alpha: YES];
|
||||
|
||||
[[[cache window] contentView] lockFocus];
|
||||
cacheCtxt = GSCurrentContext();
|
||||
|
||||
/* Clear the cache window surface */
|
||||
DPScompositerect(cacheCtxt, 0, 0, cacheSize.width, cacheSize.height, NSCompositeClear);
|
||||
gState = [cacheCtxt GSDefineGState];
|
||||
|
||||
//NSLog(@"Draw in cache size %@", NSStringFromSize(cacheSize));
|
||||
|
||||
/* We must not use -drawRepresentation:inRect: because the image must drawn
|
||||
scaled even when -scalesWhenResized is NO */
|
||||
[[self bestRepresentationForDevice: nil]
|
||||
drawInRect: NSMakeRect(0, 0, cacheSize.width, cacheSize.height)];
|
||||
/* If we're doing a dissolve, use a DestinationIn composite to lower
|
||||
the alpha of the pixels. */
|
||||
if (delta != 1.0)
|
||||
{
|
||||
DPSsetalpha(cacheCtxt, delta);
|
||||
DPScompositerect(cacheCtxt, 0, 0, cacheSize.width, cacheSize.height,
|
||||
NSCompositeDestinationIn);
|
||||
}
|
||||
|
||||
[[[cache window] contentView] unlockFocus];
|
||||
|
||||
//NSLog(@"Draw in %@ from %@ from cache rect %@", NSStringFromRect(dstRect),
|
||||
// NSStringFromRect(srcRect), NSStringFromRect(srcRectInCache));
|
||||
|
||||
[ctxt GSdraw: gState
|
||||
toPoint: dstRect.origin
|
||||
fromRect: srcRectInCache
|
||||
operation: op
|
||||
fraction: delta];
|
||||
|
||||
[ctxt GSUndefineGState: gState];
|
||||
DESTROY(cache);
|
||||
}
|
||||
}
|
||||
|
||||
/* Old code path that can probably partially be merged with the new native implementation.
|
||||
Fallback for backends other than Cairo. */
|
||||
- (void) guiDrawInRect: (NSRect)dstRect
|
||||
fromRect: (NSRect)srcRect
|
||||
operation: (NSCompositingOperation)op
|
||||
fraction: (float)delta
|
||||
{
|
||||
NSGraphicsContext *ctxt = GSCurrentContext();
|
||||
NSAffineTransform *transform;
|
||||
|
|
@ -1143,6 +1274,21 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
|
|||
}
|
||||
}
|
||||
|
||||
- (void) drawInRect: (NSRect)dstRect
|
||||
fromRect: (NSRect)srcRect
|
||||
operation: (NSCompositingOperation)op
|
||||
fraction: (float)delta
|
||||
{
|
||||
if ([GSCurrentContext() supportsDrawGState])
|
||||
{
|
||||
[self nativeDrawInRect: dstRect fromRect: srcRect operation: op fraction: delta];
|
||||
}
|
||||
else
|
||||
{
|
||||
[self guiDrawInRect: dstRect fromRect: srcRect operation: op fraction: delta];
|
||||
}
|
||||
}
|
||||
|
||||
- (void) addRepresentation: (NSImageRep *)imageRep
|
||||
{
|
||||
GSRepData *repd;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue