cpp/openttd-patchpack/source Changeset - r24778:ede24664c30a

Changeset - r24778:ede24664c30a

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master

0 2 0

Michael Lutz - 3 years ago 2021-02-06 21:58:51
michi@icosahedron.de

Change: [OSX] Use a layer-backed view to speed up drawing.

2 files changed with 19 insertions and 72 deletions:

CMakeLists.txt

src/video/cocoa/cocoa_v.mm

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CMakeLists.txt

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@@ @@ -131,6 +131,7 @@ if(NOT WIN32) @@
         find_library(AUDIOTOOLBOX_LIBRARY AudioToolbox)
         find_library(AUDIOUNIT_LIBRARY AudioUnit)
         find_library(COCOA_LIBRARY Cocoa)
         find_library(QUARTZCORE_LIBRARY QuartzCore)
     endif()
 endif()
@@ @@ -163,6 +164,9 @@ if(APPLE) @@
     if(NOT COCOA_LIBRARY)
         message(FATAL_ERROR "Cocoa is required for this platform")
     endif()
     if(NOT QUARTZCORE_LIBRARY)
         message(FATAL_ERROR "QuartzCore is required for this platform")
     endif()
 endif()
 if(OPTION_PACKAGE_DEPENDENCIES)
@@ @@ -250,6 +254,7 @@ if(APPLE) @@
         ${AUDIOTOOLBOX_LIBRARY}
         ${AUDIOUNIT_LIBRARY}
         ${COCOA_LIBRARY}
         ${QUARTZCORE_LIBRARY}
+    )
     add_definitions(

src/video/cocoa/cocoa_v.mm

➞

Show inline comments

@@ @@ -100,8 +100,6 @@ static uint32 GetTick() @@
 	VideoDriver_Cocoa *driver;
+}
 - (instancetype)initWithFrame:(NSRect)frameRect andDriver:(VideoDriver_Cocoa *)drv;
 - (void)drawRect:(NSRect)invalidRect;
 @end
@@ @@ -708,6 +706,12 @@ void VideoDriver_Cocoa::GameLoop() @@
+{
 	if (self = [ super initWithFrame:frameRect ]) {
 		self->driver = drv;
 		/* We manage our content updates ourselves. */
 		self.layerContentsRedrawPolicy = NSViewLayerContentsRedrawOnSetNeedsDisplay;
 		self.wantsLayer = YES;
 		self.layer.magnificationFilter = kCAFilterNearest;
+	}
 	return self;
+}
@@ @@ -722,80 +726,18 @@ void VideoDriver_Cocoa::GameLoop() @@
 	return YES;
+}
 - (void)drawRect:(NSRect)invalidRect
 - (BOOL)wantsUpdateLayer
+{
 	return YES;
+}
 - (void)updateLayer
+{
 	if (driver->cgcontext == nullptr) return;
 	NSGraphicsContext *ctx = [ NSGraphicsContext currentContext ];
 	CGContextRef viewContext = [ ctx respondsToSelector:@selector(CGContext) ] ? [ ctx CGContext ] : (CGContextRef)[ ctx graphicsPort ];
 	CGContextSetShouldAntialias(viewContext, FALSE);
 	CGContextSetInterpolationQuality(viewContext, kCGInterpolationNone);
 	/* The obtained 'rect' is actually a union of all dirty rects, let's ask for an explicit list of rects instead */
 	const NSRect *dirtyRects;
 	NSInteger     dirtyRectCount;
 	[ self getRectsBeingDrawn:&dirtyRects count:&dirtyRectCount ];
 	/* We need an Image in order to do blitting, but as we don't touch the context between this call and drawing no copying will actually be done here */
 	/* Set layer contents to our backing buffer, which avoids needless copying. */
 	CGImageRef fullImage = CGBitmapContextCreateImage(driver->cgcontext);
 	/* Calculate total area we are blitting */
 	uint32 blitArea = 0;
 	for (int n = 0; n < dirtyRectCount; n++) {
 		blitArea += (uint32)(dirtyRects[n].size.width * dirtyRects[n].size.height);
+	}
 	/*
 	 * This might be completely stupid, but in my extremely subjective opinion it feels faster
 	 * The point is, if we're blitting less than 50% of the dirty rect union then it's still a good idea to blit each dirty
 	 * rect separately but if we blit more than that, it's just cheaper to blit the entire union in one pass.
 	 * Feel free to remove or find an even better value than 50% ... / blackis
 	 */
 	NSRect frameRect = [ self frame ];
 	if (blitArea / (float)(invalidRect.size.width * invalidRect.size.height) > 0.5f) {
 		NSRect rect = invalidRect;
 		CGRect clipRect;
 		CGRect blitRect;
 		blitRect.origin.x = rect.origin.x;
 		blitRect.origin.y = rect.origin.y;
 		blitRect.size.width = rect.size.width;
 		blitRect.size.height = rect.size.height;
 		clipRect.origin.x = rect.origin.x;
 		clipRect.origin.y = frameRect.size.height - rect.origin.y - rect.size.height;
 		clipRect.size.width = rect.size.width;
 		clipRect.size.height = rect.size.height;
 		/* Blit dirty part of image */
 		CGImageRef clippedImage = CGImageCreateWithImageInRect(fullImage, clipRect);
 		CGContextDrawImage(viewContext, blitRect, clippedImage);
 		CGImageRelease(clippedImage);
 	} else {
 		for (int n = 0; n < dirtyRectCount; n++) {
 			NSRect rect = dirtyRects[n];
 			CGRect clipRect;
 			CGRect blitRect;
 			blitRect.origin.x = rect.origin.x;
 			blitRect.origin.y = rect.origin.y;
 			blitRect.size.width = rect.size.width;
 			blitRect.size.height = rect.size.height;
 			clipRect.origin.x = rect.origin.x;
 			clipRect.origin.y = frameRect.size.height - rect.origin.y - rect.size.height;
 			clipRect.size.width = rect.size.width;
 			clipRect.size.height = rect.size.height;
 			/* Blit dirty part of image */
 			CGImageRef clippedImage = CGImageCreateWithImageInRect(fullImage, clipRect);
 			CGContextDrawImage(viewContext, blitRect, clippedImage);
 			CGImageRelease(clippedImage);
+		}
+	}
 	self.layer.contents = (__bridge id)fullImage;
 	CGImageRelease(fullImage);
+}

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