migrate skpdiff to tools

tools/skpdiff/skpdiff_main.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #if SK_SUPPORT_OPENCL
+
 #define __NO_STD_VECTOR // Uses cl::vectpr instead of std::vectpr
 #define __NO_STD_STRING // Uses cl::STRING_CLASS instead of std::string
-#include <CL/cl.hpp>
+#if SK_BUILD_FOR_MAC
+// Note that some macs don't have this header and it can be downloaded from the Khronos registry
+#   include <OpenCL/cl.hpp>
+#else
+#   include <CL/cl.hpp>
+#endif
+
 #endif
 
 #include "SkCommandLineFlags.h"
 #include "SkGraphics.h"
 #include "SkStream.h"
 #include "SkTDArray.h"
 
 #include "SkDifferentPixelsMetric.h"
 #include "SkDiffContext.h"
 #include "SkImageDiffer.h"
 #include "SkPMetric.h"
 #include "skpdiff_util.h"
 
 #include "SkForceLinking.h"
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 // Command line argument definitions go here
 DEFINE_bool2(list, l, false, "List out available differs");
 DEFINE_string2(differs, d, "", "The names of the differs to use or all of them by default");
 DEFINE_string2(folders, f, "", "Compare two folders with identical subfile names: <baseline folder> <test folder>");
 DEFINE_string2(patterns, p, "", "Use two patterns to compare images: <baseline> <test>");
 DEFINE_string2(output, o, "skpdiff_output.json", "Writes the output of these diffs to output: <output>");
 DEFINE_bool(jsonp, true, "Output JSON with padding");
 
 #if SK_SUPPORT_OPENCL
 /// A callback for any OpenCL errors
-CL_CALLBACK void error_notify(const char* errorInfo, const void* privateInfoSize, ::size_t cb, void* userData) {
+static void CL_CALLBACK error_notify(const char* errorInfo, const void* privateInfoSize, ::size_t cb, void* userData) {
     SkDebugf("OpenCL error notify: %s\n", errorInfo);
     exit(1);
 }
 
 /// Creates a device and context with OpenCL
 static bool init_device_and_context(cl::Device* device, cl::Context* context) {
     // Query for a platform
     cl::vector<cl::Platform> platformList;
     cl::Platform::get(&platformList);
     SkDebugf("The number of platforms is %u\n", platformList.size());
 
     // Print some information about the platform for debugging
     cl::Platform& platform = platformList[0];
     cl::STRING_CLASS platformName;
     platform.getInfo(CL_PLATFORM_NAME, &platformName);
     SkDebugf("Platform index 0 is named %s\n", platformName.c_str());
 
     // Query for a device
     cl::vector<cl::Device> deviceList;
-    platform.getDevices(CL_DEVICE_TYPE_GPU, &deviceList);
-    SkDebugf("The number of GPU devices is %u\n", deviceList.size());
+    platform.getDevices(CL_DEVICE_TYPE_ALL, &deviceList);
+    SkDebugf("The number of devices is %u\n", deviceList.size());
 
     // Print some information about the device for debugging
     *device = deviceList[0];
     cl::STRING_CLASS deviceName;
     device->getInfo(CL_DEVICE_NAME, &deviceName);
     SkDebugf("Device index 0 is named %s\n", deviceName.c_str());
 
     // Create a CL context and check for all errors
     cl_int contextErr = CL_SUCCESS;
     *context = cl::Context(deviceList, NULL, error_notify, NULL, &contextErr);
@@ skipping 113 matching lines @@
     }
 
     // Output to the file specified
     if (!FLAGS_output.isEmpty()) {
         SkFILEWStream outputStream(FLAGS_output[0]);
         ctx.outputRecords(outputStream, FLAGS_jsonp);
     }
 
     return 0;
 }