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Diffstat (limited to 'src/mac_cairo.m')
-rw-r--r-- | src/mac_cairo.m | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/mac_cairo.m b/src/mac_cairo.m new file mode 100644 index 0000000..dd8fd36 --- /dev/null +++ b/src/mac_cairo.m @@ -0,0 +1,166 @@ +/* + Copyright 2019-2020 David Robillard <d@drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/** + @file mac_cairo.m + @brief Cairo graphics backend for MacOS. +*/ + +#include "implementation.h" +#include "mac.h" +#include "stub.h" + +#include "pugl/pugl_cairo.h" + +#include <cairo-quartz.h> + +#import <Cocoa/Cocoa.h> + +#include <assert.h> + +@interface PuglCairoView : NSView +@end + +@implementation PuglCairoView +{ +@public + PuglView* puglview; + cairo_surface_t* surface; + cairo_t* cr; +} + +- (id)initWithFrame:(NSRect)frame +{ + self = [super initWithFrame:frame]; + + return self; +} + +- (void)resizeWithOldSuperviewSize:(NSSize)oldSize +{ + PuglWrapperView* wrapper = (PuglWrapperView*)[self superview]; + + [super resizeWithOldSuperviewSize:oldSize]; + [wrapper setReshaped]; +} + +- (void)drawRect:(NSRect)rect +{ + PuglWrapperView* wrapper = (PuglWrapperView*)[self superview]; + [wrapper dispatchExpose:rect]; +} + +@end + +static PuglStatus +puglMacCairoCreate(PuglView* view) +{ + PuglInternals* impl = view->impl; + PuglCairoView* drawView = [PuglCairoView alloc]; + + drawView->puglview = view; + [drawView initWithFrame:[impl->wrapperView bounds]]; + if (view->hints[PUGL_RESIZABLE]) { + [drawView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable]; + } else { + [drawView setAutoresizingMask:NSViewNotSizable]; + } + + impl->drawView = drawView; + return PUGL_SUCCESS; +} + +static PuglStatus +puglMacCairoDestroy(PuglView* view) +{ + PuglCairoView* const drawView = (PuglCairoView*)view->impl->drawView; + + [drawView removeFromSuperview]; + [drawView release]; + + view->impl->drawView = nil; + return PUGL_SUCCESS; +} + +static PuglStatus +puglMacCairoEnter(PuglView* view, const PuglEventExpose* expose) +{ + PuglCairoView* const drawView = (PuglCairoView*)view->impl->drawView; + if (!expose) { + return PUGL_SUCCESS; + } + + assert(!drawView->surface); + assert(!drawView->cr); + + const double scale = 1.0 / [[NSScreen mainScreen] backingScaleFactor]; + CGContextRef context = [[NSGraphicsContext currentContext] graphicsPort]; + const CGSize sizePx = {view->frame.width, view->frame.height}; + const CGSize sizePt = CGContextConvertSizeToUserSpace(context, sizePx); + + // Convert coordinates to standard Cairo space + CGContextTranslateCTM(context, 0.0, -sizePt.height); + CGContextScaleCTM(context, scale, -scale); + + drawView->surface = cairo_quartz_surface_create_for_cg_context( + context, (unsigned)sizePx.width, (unsigned)sizePx.height); + + drawView->cr = cairo_create(drawView->surface); + + return PUGL_SUCCESS; +} + +static PuglStatus +puglMacCairoLeave(PuglView* view, const PuglEventExpose* expose) +{ + PuglCairoView* const drawView = (PuglCairoView*)view->impl->drawView; + if (!expose) { + return PUGL_SUCCESS; + } + + assert(drawView->surface); + assert(drawView->cr); + + CGContextRef context = cairo_quartz_surface_get_cg_context(drawView->surface); + + cairo_destroy(drawView->cr); + cairo_surface_destroy(drawView->surface); + drawView->cr = NULL; + drawView->surface = NULL; + + CGContextFlush(context); + + return PUGL_SUCCESS; +} + +static void* +puglMacCairoGetContext(PuglView* view) +{ + return ((PuglCairoView*)view->impl->drawView)->cr; +} + +const PuglBackend* +puglCairoBackend(void) +{ + static const PuglBackend backend = {puglStubConfigure, + puglMacCairoCreate, + puglMacCairoDestroy, + puglMacCairoEnter, + puglMacCairoLeave, + puglMacCairoGetContext}; + + return &backend; +} |