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Using an integrated video card on Metal rendering #83

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merged 3 commits into from
Mar 26, 2021
Merged

Using an integrated video card on Metal rendering #83

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06e21a8
Using an integrated video card on Metal rendering instead of a discr…
Rsedaikin Mar 26, 2021
a53d21b
Fixed typo in MTLCreateIntegratedDevice.
Rsedaikin Mar 26, 2021
f6eeca4
More smart choosing graphics card.
Rsedaikin Mar 26, 2021
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1 change: 1 addition & 0 deletions skiko/build.gradle.kts
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Original file line number Diff line number Diff line change
Expand Up @@ -381,6 +381,7 @@ tasks.withType(LinkSharedLibrary::class.java).configureEach {
"-framework", "CoreServices",
"-framework", "CoreText",
"-framework", "Foundation",
"-framework", "IOKit",
"-framework", "Metal",
"-framework", "OpenGL",
"-framework", "QuartzCore" // for CoreAnimation
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56 changes: 55 additions & 1 deletion skiko/src/jvmMain/objectiveC/macos/MetalRedrawer.mm
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Expand Up @@ -13,6 +13,11 @@
#import <mtl/GrMtlBackendContext.h>
#import <mtl/GrMtlTypes.h>

#define MuxGraphicsCard 7
#define kOpen 0
#define kGetMuxState 3
#define kDriverClassName "AppleGraphicsControl"

@interface AWTMetalLayer : CAMetalLayer

@property jobject javaRef;
Expand Down Expand Up @@ -100,6 +105,55 @@ JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_makeMeta
return (jlong) renderTarget;
}

BOOL isUsingIntegratedGPU() {
kern_return_t kernResult = 0;
io_iterator_t iterator = IO_OBJECT_NULL;
io_service_t service = IO_OBJECT_NULL;

kernResult = IOServiceGetMatchingServices(kIOMasterPortDefault, IOServiceMatching(kDriverClassName), &iterator);
assert(kernResult == KERN_SUCCESS);

service = IOIteratorNext(iterator);
io_connect_t switcherConnect;

kernResult = IOServiceOpen(service, mach_task_self(), 0, &switcherConnect);
assert(kernResult == KERN_SUCCESS);

kernResult = IOConnectCallScalarMethod(switcherConnect, kOpen, NULL, 0, NULL, NULL);
assert(kernResult == KERN_SUCCESS);

uint64_t output;
uint32_t outputCount = 1;
uint64_t scalarI_64[2] = { 1, MuxGraphicsCard };

kernResult = IOConnectCallScalarMethod(switcherConnect,
kGetMuxState,
scalarI_64,
2,
&output,
&outputCount);
return output != 0;
}

id<MTLDevice> MTLCreateIntegratedDevice() {
BOOL isIntegratedGPU = isUsingIntegratedGPU();
id<MTLDevice> gpu = nil;

if (isIntegratedGPU) {
NSArray<id<MTLDevice>> *devices = MTLCopyAllDevices();
for (id<MTLDevice> device in devices) {
if (device.isLowPower) {
gpu = device;
break;
}
}
}
if (gpu == nil) {
gpu = MTLCreateSystemDefaultDevice();
}
return gpu;
}

JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_createMetalDevice(
JNIEnv *env, jobject redrawer, jlong platformInfoPtr)
{
Expand All @@ -116,7 +170,7 @@ JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_createMe
[container addSublayer: layer];
layer.javaRef = env->NewGlobalRef(redrawer);

id<MTLDevice> fDevice = MTLCreateSystemDefaultDevice();
id<MTLDevice> fDevice = MTLCreateIntegratedDevice();
id<MTLCommandQueue> fQueue = [fDevice newCommandQueue];

device.container = container;
Expand Down