Monitor profile tool, now with Windows support, too!

tools/get_current_monitor_profile.cpp

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkStream.h"
+
+#if defined(SK_BUILD_FOR_MAC)
+#include <ApplicationServices/ApplicationServices.h>
+#elif defined(SK_BUILD_FOR_WIN)
+#include <windows.h>
+#endif
+
+int main(int argc, char** argv) {
+#if defined(SK_BUILD_FOR_MAC)
+    CGColorSpaceRef cs = CGDisplayCopyColorSpace(CGMainDisplayID());
+    CFDataRef dataRef = CGColorSpaceCopyICCProfile(cs);
+    const uint8_t* data = CFDataGetBytePtr(dataRef);
+    size_t size = CFDataGetLength(dataRef);
+    
+    SkFILEWStream file("monitor_0.icc");
+    file.write(data, size);
+    
+    CFRelease(cs);
+    CFRelease(dataRef);
+    return 0;
+#elif defined(SK_BUILD_FOR_WIN)
+    DISPLAY_DEVICE dd = { sizeof(DISPLAY_DEVICE) };
+    SkString outputFilename;
+
+    // Chrome's code for this currently just gets the primary monitor's profile. This code iterates
+    // over all attached monitors, so it's "better" in that sense. Making intelligent use of this
+    // information (via things like MonitorFromWindow or MonitorFromRect to pick the correct
+    // profile for a particular window or region of a window), is an exercise left to the reader.
+    for (int i = 0; EnumDisplayDevices(NULL, i, &dd, 0); ++i) {
+        if (dd.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP) {
+            // There are other helpful things in dd at this point:
+            // dd.DeviceString has a longer name for the adapter
+            // dd.StateFlags indicates primary display, mirroring, etc...
+            HDC dc = CreateDC(NULL, dd.DeviceName, NULL, NULL);
+            if (dc) {
+                char icmPath[MAX_PATH + 1];
+                DWORD pathLength = MAX_PATH;
+                if (GetICMProfile(dc, &pathLength, icmPath)) {
+                    // GetICMProfile just returns the path to the installed profile (not the data)
+                    outputFilename = SkStringPrintf("monitor_%d.icc", i);
+                    CopyFile(icmPath, outputFilename.c_str(), FALSE);
+                }
+                DeleteDC(dc);
+            }
+        }
+    }
+
+    return 0;
+#else
+    SkDebugf("ERROR: Unsupported platform\n");
+    return 1;
+#endif
+}