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Simpler code to support layer-based views that occur when macOS ≥ 10.14

This commit is contained in:
ManoloFLTK 2020-07-11 15:40:53 +02:00
parent 2984fe638c
commit e5fbfcbec1
1 changed files with 25 additions and 49 deletions
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74
src/Fl_cocoa.mm
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@ -514,8 +514,7 @@ void Fl_Cocoa_Screen_Driver::breakMacEventLoop()
NSRange selectedRange;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
@public
CGContextRef aux_bitmap; // stores a copy of the last content of the view, also used to draw outside drawRect:
BOOL direct_draw; // YES means drawing outside drawRect:
CGContextRef aux_bitmap; // all drawing to view goes there and is finally copied to the CALayer
#endif
}
+ (void)prepareEtext:(NSString*)aString;
@ -2142,20 +2141,15 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
gives a graphics context whose product ultimately appears on screen. But the
full content of the view must be redrawn each time drawRect: runs, in contrast
to pre-10.14 where drawings were added to the previous window content.
That is why FLView maintains a bitmap (view->aux_bitmap) equal to the last content of the FLView.
At the beginning of drawRect:, aux_bitmap is copied to the graphics context,
then drawRect: does its drawing, finally the view's graphical content as it is at the end of
drawRect: is copied back to aux_bitmap.
That is why FLView maintains a bitmap (view->aux_bitmap) to which all drawing is directed.
At the end of drawRect:, the content of view->aux_bitmap is copied to the window's graphics context.
A problem arises to support drawing done outside Fl_Window_Driver::flush(), that is,
after the app calls Fl_Window::make_current() at any time it wants.
That situation is identified by the condition (views_use_CA && !through_drawRect).
A graphics context usable outside drawRect: that ultimately appears on screen,
if it exists, was not identified. Drawing operations after the call to Fl_Window::make_current()
are directed to aux_bitmap. Fl_Window::make_current() sets to YES the direct_draw member
of the FLView and also calls [view setNeedsDisplay:YES] which instructs the system to
Fl_Window::make_current() thus calls [view setNeedsDisplay:YES] which instructs the system to
run drawRect: at the next event loop. Later, when drawRect: runs, the content of
aux_bitmap is copied to drawRect's graphics context and direct_draw is set to NO.
aux_bitmap is copied to drawRect's graphics context.
OpenGL windows remain processed under 10.14 as before.
*/
@ -2227,16 +2221,12 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
if (!window) return; // may happen after closing full-screen window
fl_lock_function();
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
CGContextRef gc = views_use_CA ? [[NSGraphicsContext currentContext] CGContext] : NULL;
// this condition (unchanged W and H but changed BytesPerRow) occurs with 10.15
size_t to_copy = gc && (!aux_bitmap ||
(CGBitmapContextGetBytesPerRow(gc) == CGBitmapContextGetBytesPerRow(aux_bitmap))) ?
CGBitmapContextGetHeight(gc) * CGBitmapContextGetBytesPerRow(gc) : 0;
CGContextRef destination = views_use_CA ? [[NSGraphicsContext currentContext] CGContext] : NULL;
#endif
Fl_Cocoa_Window_Driver *d = Fl_Cocoa_Window_Driver::driver(window);
if (!through_Fl_X_flush
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
&& !direct_draw
&& (!views_use_CA || !aux_bitmap)
#endif
) {
[self did_view_resolution_change];
@ -2254,35 +2244,24 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
window->clear_damage(FL_DAMAGE_ALL);
}
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
else if (gc && aux_bitmap && ( Fl_X::i(window)->region || !(window->damage()&FL_DAMAGE_ALL)) ) {
if (to_copy) {
memcpy(CGBitmapContextGetData(gc), CGBitmapContextGetData(aux_bitmap), to_copy);
} else {
CGImageRef img = CGBitmapContextCreateImage(aux_bitmap);
CGContextDrawImage(gc, [self frame], img);
CGImageRelease(img);
}
}
if (destination && !aux_bitmap) [self create_aux_bitmap:destination retina:d->mapped_to_retina()];
#endif
through_drawRect = YES;
if (window->damage()) d->Fl_Window_Driver::flush();
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
if (gc) {
if (window->damage()) {
d->Fl_Window_Driver::flush();
if (!aux_bitmap) [self create_aux_bitmap:gc retina:d->mapped_to_retina()];
if (to_copy) {
memcpy(CGBitmapContextGetData(aux_bitmap), CGBitmapContextGetData(gc), to_copy);
} else {
CGImageRef img = CGBitmapContextCreateImage(gc);
CGContextDrawImage(aux_bitmap, [self frame], img);
CGImageRelease(img);
}
if (destination) {
if (CGBitmapContextGetBytesPerRow(aux_bitmap) == CGBitmapContextGetBytesPerRow(destination)) {
memcpy(CGBitmapContextGetData(destination), CGBitmapContextGetData(aux_bitmap),
CGBitmapContextGetHeight(aux_bitmap) * CGBitmapContextGetBytesPerRow(aux_bitmap));
} else {
// this condition (unchanged W and H but changed BytesPerRow) occurs with 10.15
CGImageRef img = CGBitmapContextCreateImage(aux_bitmap);
CGContextDrawImage(destination, [self frame], img);
CGImageRelease(img);
}
Fl_Cocoa_Window_Driver::q_release_context();
direct_draw = NO;
} else
}
#endif
d->Fl_Window_Driver::flush();
if (!through_Fl_X_flush) window->clear_damage();
through_drawRect = NO;
fl_unlock_function();
@ -3373,12 +3352,12 @@ void Fl_Cocoa_Window_Driver::make_current()
changed_resolution(false);
}
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14
FLView *view = (FLView*)[fl_window contentView];
if (views_use_CA && !through_drawRect) { // detect direct calls from the app
FLView *view = (FLView*)[fl_xid(pWindow) contentView];
if (!view->aux_bitmap) [view display];
gc = view->aux_bitmap;
view->direct_draw = YES;
[view setNeedsDisplay:YES];
}
if (views_use_CA && view->aux_bitmap) {
gc = view->aux_bitmap;
} else
#endif
{
@ -4227,11 +4206,8 @@ static NSBitmapImageRep* GL_rect_to_nsbitmap(Fl_Window *win, int x, int y, int w
static NSBitmapImageRep* rect_to_NSBitmapImage_layer(Fl_Window *win, int x, int y, int w, int h)
{ // capture window data for layer-based views because initWithFocusedViewRect: does not work for them
FLView *view = (FLView*)[fl_xid(win) contentView];
// make sure to get the most recent content of the view
CGContextRef source_bitmap = (CGContextRef)fl_graphics_driver->gc();
if (!source_bitmap || win != Fl_Window::current()) source_bitmap = view->aux_bitmap;
if (!source_bitmap) return nil;
CGImageRef cgimg = CGBitmapContextCreateImage(source_bitmap);
if (!view->aux_bitmap) return nil;
CGImageRef cgimg = CGBitmapContextCreateImage(view->aux_bitmap);
if (x || y || w != win->w() || h != win->h()) {
float s = Fl::screen_driver()->scale(0);
if (Fl_Cocoa_Window_Driver::driver(win)->mapped_to_retina()) s *= 2;