Mac: Separate backends from platform implementation

1 files changed, 184 insertions, 0 deletions

diff --git a/pugl/detail/mac_gl.m b/pugl/detail/mac_gl.m
new file mode 100644
index 0000000..4a6e39a
--- /dev/null
+++ b/pugl/detail/mac_gl.m
@@ -0,0 +1,184 @@
+/*
+  Copyright 2019 David Robillard <http://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_gl.m OpenGL graphics backend for MacOS.
+*/
+
+#include "pugl/detail/implementation.h"
+#include "pugl/detail/mac.h"
+#include "pugl/pugl_gl_backend.h"
+
+#ifndef __MAC_10_10
+#define NSOpenGLProfileVersion4_1Core NSOpenGLProfileVersion3_2Core
+typedef NSUInteger NSEventModifierFlags;
+typedef NSUInteger NSWindowStyleMask;
+#endif
+
+@interface PuglOpenGLView : NSOpenGLView
+{
+@public
+	PuglView* puglview;
+}
+
+@end
+
+@implementation PuglOpenGLView
+
+- (id) initWithFrame:(NSRect)frame
+{
+	const int major   = puglview->hints.context_version_major;
+	const int profile = ((puglview->hints.use_compat_profile || major < 3)
+	                     ? NSOpenGLProfileVersionLegacy
+	                     : puglview->hints.context_version_major >= 4
+	                       ? NSOpenGLProfileVersion4_1Core
+	                       : NSOpenGLProfileVersion3_2Core);
+
+	NSOpenGLPixelFormatAttribute pixelAttribs[16] = {
+		NSOpenGLPFADoubleBuffer,
+		NSOpenGLPFAAccelerated,
+		NSOpenGLPFAOpenGLProfile, profile,
+		NSOpenGLPFAColorSize,     32,
+		NSOpenGLPFADepthSize,     32,
+		NSOpenGLPFAMultisample,   puglview->hints.samples ? 1 : 0,
+		NSOpenGLPFASampleBuffers, puglview->hints.samples ? 1 : 0,
+		NSOpenGLPFASamples,       puglview->hints.samples,
+		0};
+
+	NSOpenGLPixelFormat* pixelFormat = [
+		[NSOpenGLPixelFormat alloc] initWithAttributes:pixelAttribs];
+
+	if (pixelFormat) {
+		self = [super initWithFrame:frame pixelFormat:pixelFormat];
+		[pixelFormat release];
+	} else {
+		self = [super initWithFrame:frame];
+	}
+
+	if (self) {
+		[[self openGLContext] makeCurrentContext];
+		[self reshape];
+	}
+	return self;
+}
+
+- (void) reshape
+{
+	PuglWrapperView* wrapper = (PuglWrapperView*)[self superview];
+
+	[super reshape];
+	[wrapper dispatchConfigure:[self bounds]];
+}
+
+- (void) update
+{
+	PuglWrapperView* wrapper = (PuglWrapperView*)[self superview];
+
+	[super update];
+	[wrapper dispatchConfigure:[self bounds]];
+}
+
+@end
+
+static int
+puglMacGlConfigure(PuglView* PUGL_UNUSED(view))
+{
+	return 0;
+}
+
+static int
+puglMacGlCreate(PuglView* view)
+{
+	PuglInternals*  impl     = view->impl;
+	PuglOpenGLView* drawView = [PuglOpenGLView alloc];
+
+	drawView->puglview = view;
+	[drawView initWithFrame:NSMakeRect(0, 0, view->width, view->height)];
+	if (view->hints.resizable) {
+		[drawView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
+	} else {
+		[drawView setAutoresizingMask:NSViewNotSizable];
+	}
+
+	impl->drawView = drawView;
+	return 0;
+}
+
+static int
+puglMacGlDestroy(PuglView* view)
+{
+	PuglOpenGLView* const drawView = (PuglOpenGLView*)view->impl->drawView;
+
+	[drawView removeFromSuperview];
+	[drawView release];
+
+	view->impl->drawView = nil;
+	return 0;
+}
+
+static int
+puglMacGlEnter(PuglView* view, bool PUGL_UNUSED(drawing))
+{
+	PuglOpenGLView* const drawView = (PuglOpenGLView*)view->impl->drawView;
+
+	[[drawView openGLContext] makeCurrentContext];
+	return 0;
+}
+
+static int
+puglMacGlLeave(PuglView* view, bool drawing)
+{
+	PuglOpenGLView* const drawView = (PuglOpenGLView*)view->impl->drawView;
+
+	if (drawing) {
+		[[drawView openGLContext] flushBuffer];
+	}
+
+	[NSOpenGLContext clearCurrentContext];
+
+	return 0;
+}
+
+static int
+puglMacGlResize(PuglView* view, int PUGL_UNUSED(width), int PUGL_UNUSED(height))
+{
+	PuglOpenGLView* const drawView = (PuglOpenGLView*)view->impl->drawView;
+
+	[drawView reshape];
+
+	return 0;
+}
+
+static void*
+puglMacGlGetContext(PuglView* PUGL_UNUSED(view))
+{
+	return NULL;
+}
+
+const PuglBackend* puglGlBackend(void)
+{
+	static const PuglBackend backend = {
+		puglMacGlConfigure,
+		puglMacGlCreate,
+		puglMacGlDestroy,
+		puglMacGlEnter,
+		puglMacGlLeave,
+		puglMacGlResize,
+		puglMacGlGetContext
+	};
+
+	return &backend;
+}