I have 2 files which contain a cursor image with different sizes.
If NSImage is created with representations from these files and set NSCursor, the first image is always shown on both non-Retian and Retina display (I use the Quartz Debug).
If representations size is divided by the screen scale factor
---------
NSSize size = [imgRep size];
[imgRep setSize:NSMakeSize(size.width /scaleFactor, size.height / scaleFactor)];
--------
the high-resolution image is correctly shown for the NSCursor on Retina display.
See the samples.
NSImage representations are not scaled. The bigger image is not shown for the cursor on Retina:
------------------------------------
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
[self performSelector:@selector(doChangeCursor) withObject:nil afterDelay:1];
}
- (void) showRepresentations: (NSImage *) image {
NSImageRep *img = nil;
NSArray *images = [image representations];
NSEnumerator *imageEnumerator = [images objectEnumerator];
while ((img = [imageEnumerator nextObject]) != nil) {
NSSize size = [img size];
NSLog(@"Image variant size[%f, %f]", size.width, size.height);
}
}
- (void) doChangeCursor
{
NSString *file = @"/tmp/cursor/image.png";
NSString *file2x = @"/tmp/cursor/image2.png";
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
NSImage *image2x = [[NSImage alloc] initWithContentsOfFile:file2x];
[image addRepresentations: [image2x representations]];
[self showRepresentations:image];
//[self rescaleRepresentations:image];
NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
[cursor set];
}
------------------------------------
NSImage representations are scaled. The bigger image is correctly shown for the cursor on Retina:
------------------------------------
- (void) rescaleRepresentations: (NSImage *) image {
NSImageRep *img = nil;
NSArray *images = [image representations];
NSEnumerator *imageEnumerator = [images objectEnumerator];
int scaleFactor = 1;
while ((img = [imageEnumerator nextObject]) != nil) {
NSSize size = [img size];
NSLog(@"Image variant size[%f, %f]", size.width, size.height);
[img setSize:NSMakeSize(size.width /scaleFactor, size.height / scaleFactor)];
size = [img size];
NSLog(@"Image updated size[%f, %f]", size.width, size.height);
scaleFactor++;
}
}
- (void) doChangeCursor
{
NSString *file = @"/tmp/cursor/image.png";
NSString *file2x = @"/tmp/cursor/image2.png";
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
NSImage *image2x = [[NSImage alloc] initWithContentsOfFile:file2x];
[image addRepresentations: [image2x representations]];
//[self showRepresentations:image];
[self rescaleRepresentations:image];
NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
[cursor set];
}
Show
added a comment - I have 2 files which contain a cursor image with different sizes.
If NSImage is created with representations from these files and set NSCursor, the first image is always shown on both non-Retian and Retina display (I use the Quartz Debug).
If representations size is divided by the screen scale factor
---------
NSSize size = [imgRep size];
[imgRep setSize:NSMakeSize(size.width /scaleFactor, size.height / scaleFactor)];
--------
the high-resolution image is correctly shown for the NSCursor on Retina display.
See the samples.
NSImage representations are not scaled. The bigger image is not shown for the cursor on Retina:
------------------------------------
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
[self performSelector:@selector(doChangeCursor) withObject:nil afterDelay:1];
}
- (void) showRepresentations: (NSImage *) image {
NSImageRep *img = nil;
NSArray *images = [image representations];
NSEnumerator *imageEnumerator = [images objectEnumerator];
while ((img = [imageEnumerator nextObject]) != nil) {
NSSize size = [img size];
NSLog(@"Image variant size[%f, %f]", size.width, size.height);
}
}
- (void) doChangeCursor
{
NSString *file = @"/tmp/cursor/image.png";
NSString *file2x = @"/tmp/cursor/image2.png";
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
NSImage *image2x = [[NSImage alloc] initWithContentsOfFile:file2x];
[image addRepresentations: [image2x representations]];
[self showRepresentations:image];
//[self rescaleRepresentations:image];
NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
[cursor set];
}
------------------------------------
NSImage representations are scaled. The bigger image is correctly shown for the cursor on Retina:
------------------------------------
- (void) rescaleRepresentations: (NSImage *) image {
NSImageRep *img = nil;
NSArray *images = [image representations];
NSEnumerator *imageEnumerator = [images objectEnumerator];
int scaleFactor = 1;
while ((img = [imageEnumerator nextObject]) != nil) {
NSSize size = [img size];
NSLog(@"Image variant size[%f, %f]", size.width, size.height);
[img setSize:NSMakeSize(size.width /scaleFactor, size.height / scaleFactor)];
size = [img size];
NSLog(@"Image updated size[%f, %f]", size.width, size.height);
scaleFactor++;
}
}
- (void) doChangeCursor
{
NSString *file = @"/tmp/cursor/image.png";
NSString *file2x = @"/tmp/cursor/image2.png";
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
NSImage *image2x = [[NSImage alloc] initWithContentsOfFile:file2x];
[image addRepresentations: [image2x representations]];
//[self showRepresentations:image];
[self rescaleRepresentations:image];
NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
[cursor set];
}
Enhancement
P3
If NSImage is created with representations from these files and set NSCursor, the first image is always shown on both non-Retian and Retina display (I use the Quartz Debug).
If representations size is divided by the screen scale factor
---------
NSSize size = [imgRep size];
[imgRep setSize:NSMakeSize(size.width /scaleFactor, size.height / scaleFactor)];
--------
the high-resolution image is correctly shown for the NSCursor on Retina display.
See the samples.
NSImage representations are not scaled. The bigger image is not shown for the cursor on Retina:
------------------------------------
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
[self performSelector:@selector(doChangeCursor) withObject:nil afterDelay:1];
}
- (void) showRepresentations: (NSImage *) image {
NSImageRep *img = nil;
NSArray *images = [image representations];
NSEnumerator *imageEnumerator = [images objectEnumerator];
while ((img = [imageEnumerator nextObject]) != nil) {
NSSize size = [img size];
NSLog(@"Image variant size[%f, %f]", size.width, size.height);
}
}
- (void) doChangeCursor
{
NSString *file = @"/tmp/cursor/image.png";
NSString *file2x = @"/tmp/cursor/image2.png";
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
NSImage *image2x = [[NSImage alloc] initWithContentsOfFile:file2x];
[image addRepresentations: [image2x representations]];
[self showRepresentations:image];
//[self rescaleRepresentations:image];
NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
[cursor set];
}
------------------------------------
NSImage representations are scaled. The bigger image is correctly shown for the cursor on Retina:
------------------------------------
- (void) rescaleRepresentations: (NSImage *) image {
NSImageRep *img = nil;
NSArray *images = [image representations];
NSEnumerator *imageEnumerator = [images objectEnumerator];
int scaleFactor = 1;
while ((img = [imageEnumerator nextObject]) != nil) {
NSSize size = [img size];
NSLog(@"Image variant size[%f, %f]", size.width, size.height);
[img setSize:NSMakeSize(size.width /scaleFactor, size.height / scaleFactor)];
size = [img size];
NSLog(@"Image updated size[%f, %f]", size.width, size.height);
scaleFactor++;
}
}
- (void) doChangeCursor
{
NSString *file = @"/tmp/cursor/image.png";
NSString *file2x = @"/tmp/cursor/image2.png";
NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
NSImage *image2x = [[NSImage alloc] initWithContentsOfFile:file2x];
[image addRepresentations: [image2x representations]];
//[self showRepresentations:image];
[self rescaleRepresentations:image];
NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
[cursor set];
}