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Add native API to allow access to Metal surface on Mac

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This commit is contained in:
Richard Knight 2020-10-03 14:09:11 +01:00
parent 40d150c399
commit 1a0306c50e
2 changed files with 71 additions and 31 deletions
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14
include/GLFW/glfw3native.h
View File

@ -215,6 +215,20 @@ GLFWAPI CGDirectDisplayID glfwGetCocoaMonitor(GLFWmonitor* monitor);
* @ingroup native
*/
GLFWAPI id glfwGetCocoaWindow(GLFWwindow* window);
/*! @brief Returns the `CAMetalLayer` for the specified window.
*
* @return The `CAMetalLayer` of the specified window, or `nil` if an
* [error](@ref error_handling) occurred.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI id glfwGetMetalLayer(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_NSGL)

88
src/cocoa_window.m
View File

@ -878,6 +878,48 @@ static GLFWbool createNativeWindow(_GLFWwindow* window,
return GLFW_TRUE;
}
static GLFWbool createMetalLayer(_GLFWwindow* window)
{
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101100
@autoreleasepool {
// HACK: Dynamically load Core Animation to avoid adding an extra
// dependency for the majority who don't use MoltenVK
NSBundle* bundle = [NSBundle bundleWithPath:@"/System/Library/Frameworks/QuartzCore.framework"];
if (!bundle)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Failed to find QuartzCore.framework");
return GLFW_FALSE;
}
// NOTE: Create the layer here as makeBackingLayer should not return nil
window->ns.layer = [[bundle classNamed:@"CAMetalLayer"] layer];
if (!window->ns.layer)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Failed to create layer for view");
return GLFW_FALSE;
}
if (window->ns.retina)
[window->ns.layer setContentsScale:[window->ns.object backingScaleFactor]];
[window->ns.view setLayer:window->ns.layer];
[window->ns.view setWantsLayer:YES];
} // autoreleasepool
return GLFW_TRUE;
#else
return GLFW_FALSE;
#endif
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
@ -1805,33 +1847,8 @@ VkResult _glfwPlatformCreateWindowSurface(VkInstance instance,
const VkAllocationCallbacks* allocator,
VkSurfaceKHR* surface)
{
@autoreleasepool {
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101100
// HACK: Dynamically load Core Animation to avoid adding an extra
// dependency for the majority who don't use MoltenVK
NSBundle* bundle = [NSBundle bundleWithPath:@"/System/Library/Frameworks/QuartzCore.framework"];
if (!bundle)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Failed to find QuartzCore.framework");
if (!createMetalLayer(window))
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
// NOTE: Create the layer here as makeBackingLayer should not return nil
window->ns.layer = [[bundle classNamed:@"CAMetalLayer"] layer];
if (!window->ns.layer)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Failed to create layer for view");
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
if (window->ns.retina)
[window->ns.layer setContentsScale:[window->ns.object backingScaleFactor]];
[window->ns.view setLayer:window->ns.layer];
[window->ns.view setWantsLayer:YES];
VkResult err;
@ -1884,11 +1901,6 @@ VkResult _glfwPlatformCreateWindowSurface(VkInstance instance,
}
return err;
#else
return VK_ERROR_EXTENSION_NOT_PRESENT;
#endif
} // autoreleasepool
}
@ -1903,3 +1915,17 @@ GLFWAPI id glfwGetCocoaWindow(GLFWwindow* handle)
return window->ns.object;
}
GLFWAPI id glfwGetMetalLayer(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(nil);
if (!window->ns.layer)
{
if (!createMetalLayer(window))
return nil;
}
return window->ns.layer;
}