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Fix macOS crash when drawing image with draw_image() in some scenarios (#1372)

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This commit is contained in:
ManoloFLTK 2026-03-09 14:43:59 +01:00
parent ea27dafe1e
commit d9a3fb32da
1 changed files with 15 additions and 17 deletions
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32
src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx
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@ -50,28 +50,27 @@ static void innards(const uchar *buf, int X, int Y, int W, int H,
{
if (!linedelta) linedelta = W*abs(delta);
uchar *tmpBuf = 0;
if (!cb) {
if (delta < 0) buf -= (W-1)*(-delta);
if (linedelta < 0) buf -= (H-1)*abs(linedelta);
}
const void *array = buf;
if (cb || driver->has_feature(Fl_Quartz_Graphics_Driver::PRINTER)) {
tmpBuf = new uchar[ H*W*abs(delta) ];
if (cb) {
for (int i=0; i<H; i++) {
cb(userdata, 0, i, W, tmpBuf+i*W*abs(delta));
}
} else {
uchar *p = tmpBuf;
for (int i=0; i<H; i++) {
memcpy(p, buf+i*abs(linedelta), W*abs(delta));
p += W*abs(delta);
}
// Always duplicate the image data because Quartz delays using that data which may have
// been released when used (see #1372).
uchar *tmpBuf = new uchar[ H*W*abs(delta) ];
if (cb) {
for (int i=0; i<H; i++) {
cb(userdata, 0, i, W, tmpBuf+i*W*abs(delta));
}
} else {
uchar *p = tmpBuf;
for (int i=0; i<H; i++) {
memcpy(p, buf+i*abs(linedelta), W*abs(delta));
p += W*abs(delta);
}
array = (void*)tmpBuf;
linedelta = W*abs(delta);
}
array = (void*)tmpBuf;
linedelta = W*abs(delta);
// create an image context
CGColorSpaceRef lut = 0;
if (abs(delta)<=2)
@ -81,8 +80,7 @@ static void innards(const uchar *buf, int X, int Y, int W, int H,
// a release callback is necessary when the gc is a print context because the image data
// must be kept until the page is closed. Thus tmpBuf can't be deleted here. It's too early.
CGDataProviderRef src = CGDataProviderCreateWithData( 0L, array, abs(linedelta)*H,
tmpBuf ? dataReleaseCB : NULL
);
dataReleaseCB);
CGImageRef img = CGImageCreate( W, H, 8, 8*abs(delta), abs(linedelta),
lut, abs(delta)&1?kCGImageAlphaNone:kCGImageAlphaLast,
src, 0L, false, kCGRenderingIntentDefault);