df8e0900fe
- Add Volk repo to fetchDependencies script and ExternalRevisions/Volk_repo_revision file. - Cube.xcodeproj modify header paths, use of Volk, and remove old and unused files. - Update Demos/README.md to explain that Volk requires MoltenVK be built with build setting MVK_HIDE_VULKAN_SYMBOLS enabled. - MVKInstance support aliasing function name in one extension to a function in another extension, to allow MVK_HIDE_VULKAN_SYMBOLS to work with extensions promoted to another extension, but not to core, and remove additional duplicate functions that were promoted to 1.3, but were breaking use of MVK_HIDE_VULKAN_SYMBOLS.
146 lines
4.7 KiB
Objective-C
146 lines
4.7 KiB
Objective-C
/*
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* DemoViewController.m
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*
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* Copyright (c) 2015-2024 The Brenwill Workshop Ltd. (http://www.brenwill.com)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "DemoViewController.h"
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#import <QuartzCore/CAMetalLayer.h>
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#import <CoreVideo/CVDisplayLink.h>
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#include <MoltenVK/mvk_vulkan.h>
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#include "cube.c"
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#pragma mark -
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#pragma mark DemoViewController
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@implementation DemoViewController {
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CVDisplayLinkRef _displayLink;
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struct demo demo;
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uint32_t _maxFrameCount;
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uint64_t _frameCount;
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BOOL _stop;
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BOOL _useDisplayLink;
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}
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/** Since this is a single-view app, initialize Vulkan as view is appearing. */
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-(void) viewWillAppear {
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[super viewWillAppear];
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self.view.wantsLayer = YES; // Back the view with a layer created by the makeBackingLayer method.
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// Enabling this will sync the rendering loop with the natural display link
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// (monitor refresh rate, typically 60 fps). Disabling this will allow the
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// rendering loop to run flat out, limited only by the rendering speed.
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_useDisplayLink = YES;
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// If this value is set to zero, the demo will render frames until the window is closed.
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// If this value is not zero, it establishes a maximum number of frames that will be
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// rendered, and once this count has been reached, the demo will stop rendering.
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// Once rendering is finished, if _useDisplayLink is false, the demo will immediately
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// clean up the Vulkan objects, or if _useDisplayLink is true, the demo will delay
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// cleaning up Vulkan objects until the window is closed.
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_maxFrameCount = 0;
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VkPresentModeKHR vkPresentMode = _useDisplayLink ? VK_PRESENT_MODE_FIFO_KHR : VK_PRESENT_MODE_IMMEDIATE_KHR;
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char vkPresentModeStr[64];
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sprintf(vkPresentModeStr, "%d", vkPresentMode);
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const char* argv[] = { "cube", "--present_mode", vkPresentModeStr };
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int argc = sizeof(argv)/sizeof(char*);
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demo_main(&demo, self.view.layer, argc, argv);
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_stop = NO;
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_frameCount = 0;
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if (_useDisplayLink) {
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CVDisplayLinkCreateWithActiveCGDisplays(&_displayLink);
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CVDisplayLinkSetOutputCallback(_displayLink, &DisplayLinkCallback, self);
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CVDisplayLinkStart(_displayLink);
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} else {
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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do {
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demo_draw(&demo);
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_stop = _stop || (_maxFrameCount && ++_frameCount >= _maxFrameCount);
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} while( !_stop );
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demo_cleanup(&demo);
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});
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}
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}
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-(void) viewDidDisappear {
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_stop = YES;
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if (_useDisplayLink) {
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CVDisplayLinkRelease(_displayLink);
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demo_cleanup(&demo);
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}
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[super viewDidDisappear];
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}
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#pragma mark Display loop callback function
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/** Rendering loop callback function for use with a CVDisplayLink. */
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static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink,
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const CVTimeStamp* now,
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const CVTimeStamp* outputTime,
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CVOptionFlags flagsIn,
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CVOptionFlags* flagsOut,
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void* target) {
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DemoViewController* demoVC =(DemoViewController*)target;
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if ( !demoVC->_stop ) {
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demo_draw(&demoVC->demo);
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demoVC->_stop = (demoVC->_maxFrameCount && ++demoVC->_frameCount >= demoVC->_maxFrameCount);
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}
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return kCVReturnSuccess;
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}
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@end
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#pragma mark -
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#pragma mark DemoView
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@implementation DemoView
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/** Indicates that the view wants to draw using the backing layer instead of using drawRect:. */
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-(BOOL) wantsUpdateLayer { return YES; }
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/** Returns a Metal-compatible layer. */
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+(Class) layerClass { return [CAMetalLayer class]; }
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/** If the wantsLayer property is set to YES, this method will be invoked to return a layer instance. */
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-(CALayer*) makeBackingLayer {
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CALayer* layer = [self.class.layerClass layer];
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CGSize viewScale = [self convertSizeToBacking: CGSizeMake(1.0, 1.0)];
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layer.contentsScale = MIN(viewScale.width, viewScale.height);
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return layer;
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}
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/**
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* If this view moves to a screen that has a different resolution scale (eg. Standard <=> Retina),
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* update the contentsScale of the layer, which will trigger a Vulkan VK_SUBOPTIMAL_KHR result, which
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* causes this demo to replace the swapchain, in order to optimize rendering for the new resolution.
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*/
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-(BOOL) layer: (CALayer *)layer shouldInheritContentsScale: (CGFloat)newScale fromWindow: (NSWindow *)window {
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if (newScale == layer.contentsScale) { return NO; }
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layer.contentsScale = newScale;
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return YES;
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}
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@end
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