| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| /* |
| * @author Mark Callow, www.edgewise-consulting.com. |
| * |
| * Thanks to Alex Szpakowski, @slime73 on GitHub, for his gist showing |
| * how to add a CAMetalLayer backed view. |
| */ |
| |
| #import "SDL_cocoametalview.h" |
| |
| #if SDL_VIDEO_DRIVER_COCOA && (SDL_VIDEO_VULKAN || SDL_VIDEO_RENDER_METAL) |
| |
| #include "SDL_assert.h" |
| |
| @implementation SDL_cocoametalview |
| |
| /* Return a Metal-compatible layer. */ |
| + (Class)layerClass |
| { |
| return NSClassFromString(@"CAMetalLayer"); |
| } |
| |
| /* Indicate the view wants to draw using a backing layer instead of drawRect. */ |
| - (BOOL)wantsUpdateLayer |
| { |
| return YES; |
| } |
| |
| /* When the wantsLayer property is set to YES, this method will be invoked to |
| * return a layer instance. |
| */ |
| - (CALayer*)makeBackingLayer |
| { |
| return [self.class.layerClass layer]; |
| } |
| |
| - (instancetype)initWithFrame:(NSRect)frame |
| highDPI:(BOOL)highDPI |
| { |
| if ((self = [super initWithFrame:frame])) { |
| self.highDPI = highDPI; |
| self.wantsLayer = YES; |
| |
| /* Allow resize. */ |
| self.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable; |
| |
| [self updateDrawableSize]; |
| } |
| |
| return self; |
| } |
| |
| - (NSInteger)tag |
| { |
| return METALVIEW_TAG; |
| } |
| |
| - (void)updateDrawableSize |
| { |
| CAMetalLayer *metalLayer = (CAMetalLayer *)self.layer; |
| CGSize size = self.bounds.size; |
| CGSize backingSize = size; |
| |
| if (self.highDPI) { |
| /* Note: NSHighResolutionCapable must be set to true in the app's |
| * Info.plist in order for the backing size to be high res. |
| */ |
| backingSize = [self convertSizeToBacking:size]; |
| } |
| |
| metalLayer.contentsScale = backingSize.height / size.height; |
| metalLayer.drawableSize = backingSize; |
| } |
| |
| /* Set the size of the metal drawables when the view is resized. */ |
| - (void)resizeWithOldSuperviewSize:(NSSize)oldSize |
| { |
| [super resizeWithOldSuperviewSize:oldSize]; |
| [self updateDrawableSize]; |
| } |
| |
| @end |
| |
| SDL_cocoametalview* |
| Cocoa_Mtl_AddMetalView(SDL_Window* window) |
| { |
| SDL_WindowData* data = (__bridge SDL_WindowData *)window->driverdata; |
| NSView *view = data->nswindow.contentView; |
| BOOL highDPI = (window->flags & SDL_WINDOW_ALLOW_HIGHDPI) != 0; |
| SDL_cocoametalview *metalview; |
| |
| metalview = [[SDL_cocoametalview alloc] initWithFrame:view.frame highDPI:highDPI]; |
| [view addSubview:metalview]; |
| return metalview; |
| } |
| |
| void |
| Cocoa_Mtl_GetDrawableSize(SDL_Window * window, int * w, int * h) |
| { |
| SDL_WindowData *data = (__bridge SDL_WindowData *)window->driverdata; |
| NSView *view = data->nswindow.contentView; |
| SDL_cocoametalview* metalview = [view viewWithTag:METALVIEW_TAG]; |
| if (metalview) { |
| CAMetalLayer *layer = (CAMetalLayer*)metalview.layer; |
| assert(layer != NULL); |
| if (w) { |
| *w = layer.drawableSize.width; |
| } |
| if (h) { |
| *h = layer.drawableSize.height; |
| } |
| } else { |
| SDL_GetWindowSize(window, w, h); |
| } |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_COCOA && (SDL_VIDEO_VULKAN || SDL_VIDEO_RENDER_METAL) */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |