wehub-resource-sync
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
#include "DisplayEnableSPI.h"
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#include <dlfcn.h>
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typedef CGError (*MTConfigureDisplayEnabledFn)(
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CGDisplayConfigRef config,
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CGDirectDisplayID display,
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bool enabled
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);
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static MTConfigureDisplayEnabledFn MTResolveConfigureDisplayEnabled(void) {
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// The Swift caller is @MainActor-isolated, so this lazy cache is only
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// touched from one thread. Concurrent calls would race on these statics.
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static MTConfigureDisplayEnabledFn cachedFunction = NULL;
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static bool didResolve = false;
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if (didResolve) {
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return cachedFunction;
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}
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didResolve = true;
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void *skyLight = dlopen(
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"/System/Library/PrivateFrameworks/SkyLight.framework/SkyLight",
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RTLD_LAZY
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);
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if (skyLight) {
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cachedFunction = (MTConfigureDisplayEnabledFn)dlsym(
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skyLight,
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"SLSConfigureDisplayEnabled"
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);
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}
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if (!cachedFunction) {
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void *coreGraphics = dlopen(
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"/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics",
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RTLD_LAZY
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);
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if (coreGraphics) {
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cachedFunction = (MTConfigureDisplayEnabledFn)dlsym(
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coreGraphics,
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"CGSConfigureDisplayEnabled"
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);
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}
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}
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if (!cachedFunction) {
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cachedFunction = (MTConfigureDisplayEnabledFn)dlsym(
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RTLD_DEFAULT,
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"CGSConfigureDisplayEnabled"
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);
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}
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return cachedFunction;
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}
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bool MTDisplayEnableSPIAvailable(void) {
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return MTResolveConfigureDisplayEnabled() != NULL;
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}
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CGError MTConfigureDisplayEnabled(
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CGDisplayConfigRef config,
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CGDirectDisplayID display,
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bool enabled
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) {
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MTConfigureDisplayEnabledFn function = MTResolveConfigureDisplayEnabled();
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if (!function) {
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return kCGErrorFailure;
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}
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return function(config, display, enabled);
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}
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