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Fix bug creating buggy macOS cursors with initWithCGImage

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I'm not sure why the bug was caused (press mouse button, drag to the
edge, drag cursor back to the window, release button), but it looks like
using a NSBitmapImageRep and creating the NSImage with that bitmap
works properly.
This commit is contained in:
David Capello 2017-08-25 14:27:44 -03:00
parent d674aa7330
commit 6721baa40e
1 changed files with 43 additions and 42 deletions
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85
src/she/osx/window.mm
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@ -1,5 +1,5 @@
// SHE library
// Copyright (C) 2012-2016 David Capello
// Copyright (C) 2012-2017 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
@ -173,52 +173,53 @@ using namespace she;
const int w = scale*surface->width();
const int h = scale*surface->height();
std::vector<uint32_t> buf(4*w*h);
uint32_t* bits = &buf[0];
for (int y=0; y<h; ++y) {
const uint32_t* ptr = (const uint32_t*)surface->getData(0, y/scale);
for (int x=0, u=0; x<w; ++x, ++bits) {
*bits = *ptr;
if (++u == scale) {
u = 0;
++ptr;
}
}
}
if (4*w*h == 0)
return NO;
@autoreleasepool {
CGDataProviderRef dataRef =
CGDataProviderCreateWithData(nullptr, &buf[0],
w*h*4, nullptr);
if (!dataRef)
NSBitmapImageRep* bmp =
[[NSBitmapImageRep alloc]
initWithBitmapDataPlanes:nil
pixelsWide:w
pixelsHigh:h
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSDeviceRGBColorSpace
bitmapFormat:NSAlphaNonpremultipliedBitmapFormat
bytesPerRow:w*4
bitsPerPixel:32];
if (!bmp)
return NO;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGImageRef img =
CGImageCreate(
w, h, 8, 32, 4*w,
colorSpace, kCGImageAlphaLast, dataRef,
nullptr, false, kCGRenderingIntentDefault);
CGColorSpaceRelease(colorSpace);
CGDataProviderRelease(dataRef);
NSCursor* nsCursor = nullptr;
if (img) {
NSImage* image =
[[NSImage alloc] initWithCGImage:img
size:NSMakeSize(w, h)];
CGImageRelease(img);
nsCursor =
[[NSCursor alloc] initWithImage:image
hotSpot:NSMakePoint(scale*focus.x + scale/2,
scale*focus.y + scale/2)];
uint32_t* dst = (uint32_t*)[bmp bitmapData];
for (int y=0; y<h; ++y) {
const uint32_t* src = (const uint32_t*)surface->getData(0, y/scale);
for (int x=0, u=0; x<w; ++x, ++dst) {
*dst = *src;
if (++u == scale) {
u = 0;
++src;
}
}
}
if (nsCursor)
[self.contentView setCursor:nsCursor];
return (nsCursor ? YES: NO);
NSImage* img = [[NSImage alloc] initWithSize:NSMakeSize(w, h)];
if (!img)
return NO;
[img addRepresentation:bmp];
NSCursor* nsCursor =
[[NSCursor alloc] initWithImage:img
hotSpot:NSMakePoint(scale*focus.x + scale/2,
scale*focus.y + scale/2)];
if (!nsCursor)
return NO;
[self.contentView setCursor:nsCursor];
return YES;
}
}