Added ability to read GPU stats

CaseLights.xcodeproj/project.pbxproj

@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		E9109B111C2AACF400726111 /* SystemInfoKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E9109B0B1C2AAC1B00726111 /* SystemInfoKit.framework */; };
 		E9109B151C2AAEFD00726111 /* SystemInfoKit.framework in CopyFiles */ = {isa = PBXBuildFile; fileRef = E9109B0B1C2AAC1B00726111 /* SystemInfoKit.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		E9109B191C2AAFE100726111 /* GPUStats.m in Sources */ = {isa = PBXBuildFile; fileRef = E9109B181C2AAFE100726111 /* GPUStats.m */; };
 		E9AB18011C29F8CD00BF3C51 /* Serial.m in Sources */ = {isa = PBXBuildFile; fileRef = E9AB18001C29F8CD00BF3C51 /* Serial.m */; };
 		E9AB18061C2A173500BF3C51 /* Thread.m in Sources */ = {isa = PBXBuildFile; fileRef = E9AB18051C2A173500BF3C51 /* Thread.m */; };
 		E9F13E031C28B3D3004C6B95 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = E9F13E021C28B3D3004C6B95 /* AppDelegate.m */; };
@@ -56,8 +57,10 @@
 
 /* Begin PBXFileReference section */
 		E9109B051C2AAC1B00726111 /* SystemInfoKit.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = SystemInfoKit.xcodeproj; path = JSystemInfoKit/SystemInfoKit.xcodeproj; sourceTree = "<group>"; };
-		E9AB17FF1C29F8CD00BF3C51 /* Serial.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Serial.h; sourceTree = "<group>"; };
-		E9AB18001C29F8CD00BF3C51 /* Serial.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = Serial.m; sourceTree = "<group>"; };
+		E9109B171C2AAFE100726111 /* GPUStats.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = GPUStats.h; path = CaseLights/GPUStats.h; sourceTree = "<group>"; };
+		E9109B181C2AAFE100726111 /* GPUStats.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = GPUStats.m; path = CaseLights/GPUStats.m; sourceTree = "<group>"; };
+		E9AB17FF1C29F8CD00BF3C51 /* Serial.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = Serial.h; path = CaseLights/Serial.h; sourceTree = "<group>"; };
+		E9AB18001C29F8CD00BF3C51 /* Serial.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = Serial.m; path = CaseLights/Serial.m; sourceTree = "<group>"; };
 		E9AB18041C2A173500BF3C51 /* Thread.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Thread.h; sourceTree = "<group>"; };
 		E9AB18051C2A173500BF3C51 /* Thread.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = Thread.m; sourceTree = "<group>"; };
 		E9F13DFE1C28B3D3004C6B95 /* CaseLights.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = CaseLights.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -90,6 +93,18 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
+		E9109B161C2AAFA200726111 /* LowLevel */ = {
+			isa = PBXGroup;
+			children = (
+				E9AB17FF1C29F8CD00BF3C51 /* Serial.h */,
+				E9AB18001C29F8CD00BF3C51 /* Serial.m */,
+				E9109B171C2AAFE100726111 /* GPUStats.h */,
+				E9109B181C2AAFE100726111 /* GPUStats.m */,
+			);
+			name = LowLevel;
+			path = ..;
+			sourceTree = "<group>";
+		};
 		E9F13DF51C28B3D3004C6B95 = {
 			isa = PBXGroup;
 			children = (
@@ -114,11 +129,10 @@
 				E9F13E021C28B3D3004C6B95 /* AppDelegate.m */,
 				E9AB18041C2A173500BF3C51 /* Thread.h */,
 				E9AB18051C2A173500BF3C51 /* Thread.m */,
+				E9109B161C2AAFA200726111 /* LowLevel */,
 				E9F13E071C28B3D3004C6B95 /* Assets.xcassets */,
 				E9F13E091C28B3D3004C6B95 /* MainMenu.xib */,
 				E9F13E0C1C28B3D3004C6B95 /* Info.plist */,
-				E9AB17FF1C29F8CD00BF3C51 /* Serial.h */,
-				E9AB18001C29F8CD00BF3C51 /* Serial.m */,
 				E9F13E041C28B3D3004C6B95 /* Supporting Files */,
 			);
 			path = CaseLights;
@@ -245,6 +259,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				E9AB18011C29F8CD00BF3C51 /* Serial.m in Sources */,
+				E9109B191C2AAFE100726111 /* GPUStats.m in Sources */,
 				E9F13E061C28B3D3004C6B95 /* main.m in Sources */,
 				E9F13E031C28B3D3004C6B95 /* AppDelegate.m in Sources */,
 				E9AB18061C2A173500BF3C51 /* Thread.m in Sources */,

CaseLights/AppDelegate.m

@@ -8,6 +8,7 @@
 
 #import "AppDelegate.h"
 #import "Serial.h"
+#import "GPUStats.h"
 
 #define PREF_SERIAL_PORT @"SerialPort"
 #define PREF_LIGHTS_STATE @"LightState"
@@ -60,7 +61,21 @@
     
     // TODO Prepare animations menu
     
-    // TODO Prepare visualizations menu
+    // Check if GPU Stats are available, add menu items if so
+    NSNumber *usage;
+    NSNumber *freeVRAM;
+    NSNumber *usedVRAM;
+    if ([GPUStats getGPUUsage:&usage freeVRAM:&freeVRAM usedVRAM:&usedVRAM] != 0) {
+        NSLog(@"Error reading GPU information\n");
+    } else {
+        NSMenuItem *itemUsage = [[NSMenuItem alloc] initWithTitle:@"GPU Usage" action:@selector(selectedGPUVisualization:) keyEquivalent:@""];
+        [menuVisualizations addItem:itemUsage];
+        
+        NSMenuItem *itemVRAM = [[NSMenuItem alloc] initWithTitle:@"VRAM Usage" action:@selector(selectedGPUVisualization:) keyEquivalent:@""];
+        [menuVisualizations addItem:itemVRAM];
+        
+        // TODO Enable item if it was last used
+    }
     
     // Prepare serial port menu
     NSArray *ports = [Serial listSerialPorts];
@@ -141,6 +156,10 @@
     
 }
 
+- (void)selectedGPUVisualization:(NSMenuItem *)sender {
+    
+}
+
 - (void)selectedSerialPort:(NSMenuItem *)source {
     // Store selection for next start-up
     NSUserDefaults *store = [NSUserDefaults standardUserDefaults];

CaseLights/GPUStats.h

@@ -0,0 +1,15 @@
+//
+//  GPUStats.h
+//  CaseLights
+//
+//  Created by Thomas Buck on 23.12.15.
+//  Copyright © 2015 xythobuz. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface GPUStats : NSObject
+
++ (NSInteger)getGPUUsage:(NSNumber **)usage freeVRAM:(NSNumber **)free usedVRAM:(NSNumber **)used;
+
+@end

CaseLights/GPUStats.m

@@ -0,0 +1,71 @@
+//
+//  GPUStats.m
+//  CaseLights
+//
+//  Created by Thomas Buck on 23.12.15.
+//  Copyright © 2015 xythobuz. All rights reserved.
+//
+
+#import <IOKit/IOKitLib.h>
+
+#import "GPUStats.h"
+
+@implementation GPUStats
+
++ (NSInteger)getGPUUsage:(NSNumber **)usage freeVRAM:(NSNumber **)free usedVRAM:(NSNumber **)used {
+    if ((usage == nil) || (free == nil) || (used == nil)) {
+        NSLog(@"Invalid use of getGPUUsage!\n");
+        return 1;
+    }
+    
+    *usage = nil;
+    *free = nil;
+    *used = nil;
+    
+    CFMutableDictionaryRef pciDevices = IOServiceMatching(kIOAcceleratorClassName);
+    io_iterator_t iterator;
+    if (IOServiceGetMatchingServices(kIOMasterPortDefault, pciDevices, &iterator) == kIOReturnSuccess) {
+        io_registry_entry_t registry;
+        while ((registry = IOIteratorNext(iterator))) {
+            CFMutableDictionaryRef services;
+            if (IORegistryEntryCreateCFProperties(registry, &services, kCFAllocatorDefault, kNilOptions) == kIOReturnSuccess) {
+                CFMutableDictionaryRef properties = (CFMutableDictionaryRef)CFDictionaryGetValue(services, CFSTR("PerformanceStatistics"));
+                if (properties) {
+                    const void *gpuUsage = CFDictionaryGetValue(properties, CFSTR("GPU Core Utilization"));
+                    const void *freeVRAM = CFDictionaryGetValue(properties, CFSTR("vramFreeBytes"));
+                    const void *usedVRAM = CFDictionaryGetValue(properties, CFSTR("vramUsedBytes"));
+                    
+                    if (gpuUsage && freeVRAM && usedVRAM) {
+                        // Found the GPU. Store this reference for the next call
+                        static ssize_t gpuUsageNum = 0;
+                        static ssize_t freeVRAMNum = 0;
+                        static ssize_t usedVRAMNum = 0;
+                        CFNumberGetValue((CFNumberRef)gpuUsage, kCFNumberSInt64Type, &gpuUsageNum);
+                        CFNumberGetValue((CFNumberRef)freeVRAM, kCFNumberSInt64Type, &freeVRAMNum);
+                        CFNumberGetValue((CFNumberRef)usedVRAM, kCFNumberSInt64Type, &usedVRAMNum);
+                        *usage = [NSNumber numberWithDouble:gpuUsageNum / (double)10000000];
+                        *free = [NSNumber numberWithDouble:freeVRAMNum];
+                        *used = [NSNumber numberWithDouble:usedVRAMNum];
+                        
+                        //NSLog(@"GPU: %.3f%% VRAM: %.3f%%\n", gpuUsageNum / (double)10000000,
+                              //usedVRAMNum / (double)(freeVRAMNum + usedVRAMNum) * 100.0);
+                    }
+                }
+                CFRelease(services);
+            }
+            IOObjectRelease(registry);
+        }
+        IOObjectRelease(iterator);
+    } else {
+        NSLog(@"Couldn't list PCI devices!\n");
+    }
+    
+    if ((*usage != nil) && (*free != nil) && (*used != nil)) {
+        return 0;
+    } else {
+        NSLog(@"Error reading GPU data!\n");
+        return 1;
+    }
+}
+
+@end

CaseLights/Info.plist

@@ -21,7 +21,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>34</string>
+	<string>43</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.utilities</string>
 	<key>LSMinimumSystemVersion</key>

CaseLights/Serial.m

@@ -9,6 +9,8 @@
 //  Copyright © 2015 xythobuz. All rights reserved.
 //
 
+#import <Cocoa/Cocoa.h>
+#import <IOKit/IOKitLib.h>
 #import <IOKit/serial/IOSerialKeys.h>
 
 #import "Serial.h"