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macos/vulkan: Fix flickering by setting a smaller image count

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MoltenVK uses Metal, and Metal has a limited swapchain ability.
Instead of 3, set the minImageCount to 2.

Set the Metal layer when we create a new context.
This commit is contained in:
Arjan Molenaar 2025-01-09 19:45:35 +01:00
parent 422fa8c9f8
commit 993b204f5e
3 changed files with 7 additions and 9 deletions
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2
gdk/gdkvulkancontext.c
View File

@ -510,9 +510,11 @@ gdk_vulkan_context_check_swapchain (GdkVulkanContext *context,
.pNext = NULL,
.flags = 0,
.surface = priv->surface,
#ifndef __APPLE__
.minImageCount = CLAMP (4,
capabilities.minImageCount,
capabilities.maxImageCount ? capabilities.maxImageCount : G_MAXUINT32),
#endif
.imageFormat = priv->formats[priv->current_depth].vk_format.format,
.imageColorSpace = priv->formats[priv->current_depth].vk_format.colorSpace,
.imageExtent = size,

7
gdk/macos/GdkMacosView.c
View File

@ -37,16 +37,9 @@
{
if ((self = [super initWithFrame:frame]))
{
#ifdef GDK_RENDERING_VULKAN
CALayer *layer = [CAMetalLayer layer];
[layer setOpaque:NO];
#else
GdkMacosLayer *layer = [GdkMacosLayer layer];
[self setLayerContentsRedrawPolicy:NSViewLayerContentsRedrawNever];
#endif
CGSize viewScale = [self convertSizeToBacking: CGSizeMake(1.0, 1.0)];
layer.contentsScale = MIN(viewScale.width, viewScale.height);
[self setLayer:layer];
[self setWantsLayer:YES];
}

7
gdk/macos/gdkmacosvulkancontext.c
View File

@ -42,13 +42,16 @@ gdk_macos_vulkan_context_create_surface (GdkVulkanContext *context,
NSView *view = _gdk_macos_surface_get_view (GDK_MACOS_SURFACE (gdk_surface));
VkMetalSurfaceCreateInfoEXT info;
VkResult result;
CAMetalLayer *layer;
g_assert ([[view layer] isKindOfClass:[CAMetalLayer class]]);
layer = [CAMetalLayer layer];
[layer setOpaque:NO];
[view setLayer:layer];
info.sType = VK_STRUCTURE_TYPE_METAL_SURFACE_CREATE_INFO_EXT;
info.pNext = NULL;
info.flags = 0;
info.pLayer = (CAMetalLayer *)[view layer];
info.pLayer = layer;
result = GDK_VK_CHECK (vkCreateMetalSurfaceEXT,
gdk_vulkan_context_get_instance (context),