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Fix macOS 10.14 Mojave support of the FLTK-cairo interface.

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After experimenting with a modified cairo_test program that draws both with
cairo and with regular FLTK drawing functions to the same window, it seems
necessary to control for possible changes to the graphics context made by
cairo in Fl_Cocoa_Window_Driver::make_current() rather than in
cairo_create_surface().

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@13119 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Manolo Gouy 2018-11-09 14:35:55 +00:00
parent b325a6b4b2
commit 43b511b784
2 changed files with 8 additions and 7 deletions
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7
cairo/Fl_Cairo.cxx
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@ -103,13 +103,6 @@ static cairo_surface_t * cairo_create_surface(void * gc, int W, int H) {
# elif defined(_WIN32)
return cairo_win32_surface_create((HDC) gc);
# elif defined(__APPLE_QUARTZ__)
CGAffineTransform mat = CGContextGetCTM((CGContextRef)gc);
if (mat.d > 0) { // necessary for layer-backed Cairo windows
CGContextRestoreGState((CGContextRef)gc);
CGContextRestoreGState((CGContextRef)gc);
CGContextSaveGState((CGContextRef)gc);
CGContextSaveGState((CGContextRef)gc);
}
return cairo_quartz_surface_create_for_cg_context((CGContextRef) gc, W, H);
# else
# error Cairo is not supported under this platform.

8
src/Fl_cocoa.mm
View File

@ -3421,6 +3421,14 @@ void Fl_Cocoa_Window_Driver::make_current()
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
if (views_use_CA) {
gc = ((FLView*)[fl_window contentView])->layer_data.gc;
# ifdef FLTK_HAVE_CAIRO
// make sure the GC starts with an identity transformation matrix as do native Cocoa GC's
// because cairo may have changed it
CGAffineTransform mat = CGContextGetCTM(gc);
if (!CGAffineTransformIsIdentity(mat)) { // 10.4
CGContextConcatCTM(gc, CGAffineTransformInvert(mat));
}
# endif
} else
#endif
{