src/third_party/skia/tools/skpdiff/skpdiff_main.cpp - cobalt - Git at Google

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 // TODO(djsollen): Rename this whole package (perhaps to "SkMultiDiffer").
 // It's not just for "pdiff" (perceptual diffs)--it's a harness that allows
 // the execution of an arbitrary set of difference algorithms.
 // See http://skbug.com/2711 ('rename skpdiff')

 #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
 #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 "SkTaskGroup.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, "", "Writes a JSON summary of these diffs to file: <filepath>");
 DEFINE_string(alphaDir, "", "If the differ can generate an alpha mask, write it into directory: <dirpath>");
 DEFINE_string(rgbDiffDir, "", "If the differ can generate an image showing the RGB diff at each pixel, write it into directory: <dirpath>");
 DEFINE_string(whiteDiffDir, "", "If the differ can generate an image showing every changed pixel in white, write it into directory: <dirpath>");
 DEFINE_bool(jsonp, true, "Output JSON with padding");
 DEFINE_string(csv, "", "Writes the output of these diffs to a csv file: <filepath>");
 DEFINE_int32(threads, -1, "run N threads in parallel [default is derived from CPUs available]");
 DEFINE_bool(longnames, false, "Output image names are a combination of baseline and test names");

 #if SK_SUPPORT_OPENCL
 /// A callback for any OpenCL errors
 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_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);
     if (contextErr != CL_SUCCESS) {
         SkDebugf("Context creation failed: %s\n", cl_error_to_string(contextErr));
         return false;
     }

     return true;
 }

 static bool init_cl_diff(SkImageDiffer* differ) {
     // Setup OpenCL
     cl::Device device;
     cl::Context context;
     if (!init_device_and_context(&device, &context)) {
         return false;
     }

     // Setup our differ of choice
     SkCLImageDiffer* clDiffer = (SkCLImageDiffer*)differ;
     return clDiffer->init(device(), context());
 }
 #endif

 // TODO Find a better home for the diff registry. One possibility is to have the differs self
 // register.

 // List here every differ
 SkDifferentPixelsMetric gDiffPixel;
 SkPMetric gPDiff;

 // A null terminated array of pointer to every differ declared above
 SkImageDiffer* gDiffers[] = { &gDiffPixel, &gPDiff, NULL };

 int tool_main(int argc, char * argv[]);
 int tool_main(int argc, char * argv[]) {
     // Setup command line parsing
     SkCommandLineFlags::SetUsage("Compare images using various metrics.");
     SkCommandLineFlags::Parse(argc, argv);

     // Needed by various Skia components
     SkAutoGraphics ag;
     SkTaskGroup::Enabler enabled;

     if (FLAGS_list) {
         SkDebugf("Available Metrics:\n");
     }

     // Figure which differs the user chose, and optionally print them if the user requests it
     SkTDArray<SkImageDiffer*> chosenDiffers;
     for (int differIndex = 0; gDiffers[differIndex]; differIndex++) {
         SkImageDiffer* differ = gDiffers[differIndex];
         if (FLAGS_list) {
             SkDebugf("    %s", differ->getName());
             SkDebugf("\n");
         }

         // Check if this differ was chosen by any of the flags. Initialize them if they were chosen.
         if (FLAGS_differs.isEmpty()) {
             // If no differs were chosen, they all get added
             if (differ->requiresOpenCL()) {
 #if SK_SUPPORT_OPENCL
                 init_cl_diff(differ);
                 chosenDiffers.push(differ);
 #endif
             } else {
                 chosenDiffers.push(differ);
             }
         } else {
             for (int flagIndex = 0; flagIndex < FLAGS_differs.count(); flagIndex++) {
                 if (SkString(FLAGS_differs[flagIndex]).equals(differ->getName())) {
                     // Initialize OpenCL for the differ if it needs it and support was compiled in.
                     if (differ->requiresOpenCL()) {
 #if SK_SUPPORT_OPENCL
                         init_cl_diff(differ);
                         chosenDiffers.push(differ);
 #endif
                     } else {
                         chosenDiffers.push(differ);
                     }
                     break;
                 }
             }
         }
     }

     // Don't attempt to initialize the differ if we aren't going to use it
     if (FLAGS_folders.isEmpty() && FLAGS_patterns.isEmpty()) {
         return 0;
     }

     // Validate command line flags
     if (!FLAGS_folders.isEmpty()) {
         if (2 != FLAGS_folders.count()) {
             SkDebugf("Folders flag expects two arguments: <baseline folder> <test folder>\n");
             return 1;
         }
     }

     if (!FLAGS_patterns.isEmpty()) {
         if (2 != FLAGS_patterns.count()) {
             SkDebugf("Patterns flag expects two arguments: <baseline pattern> <test pattern>\n");
             return 1;
         }
     }

     if (!FLAGS_csv.isEmpty()) {
         if (1 != FLAGS_csv.count()) {
             SkDebugf("csv flag expects one argument: <csv file>\n");
             return 1;
         }
     }

     if (!FLAGS_alphaDir.isEmpty()) {
         if (1 != FLAGS_alphaDir.count()) {
             SkDebugf("alphaDir flag expects one argument: <directory>\n");
             return 1;
         }
     }
     if (!FLAGS_rgbDiffDir.isEmpty()) {
         if (1 != FLAGS_rgbDiffDir.count()) {
             SkDebugf("rgbDiffDir flag expects one argument: <directory>\n");
             return 1;
         }
     }

     if (!FLAGS_whiteDiffDir.isEmpty()) {
         if (1 != FLAGS_whiteDiffDir.count()) {
             SkDebugf("whiteDiffDir flag expects one argument: <directory>\n");
             return 1;
         }
     }

     SkDiffContext ctx;
     ctx.setDiffers(chosenDiffers);
     ctx.setLongNames(FLAGS_longnames);

     if (!FLAGS_alphaDir.isEmpty()) {
         ctx.setAlphaMaskDir(SkString(FLAGS_alphaDir[0]));
     }
     if (!FLAGS_rgbDiffDir.isEmpty()) {
         ctx.setRgbDiffDir(SkString(FLAGS_rgbDiffDir[0]));
     }
     if (!FLAGS_whiteDiffDir.isEmpty()) {
         ctx.setWhiteDiffDir(SkString(FLAGS_whiteDiffDir[0]));
     }

     if (FLAGS_threads >= 0) {
         ctx.setThreadCount(FLAGS_threads);
     }

     // Perform a folder diff if one is requested
     if (!FLAGS_folders.isEmpty()) {
         ctx.diffDirectories(FLAGS_folders[0], FLAGS_folders[1]);
     }

     // Perform a pattern diff if one is requested
     if (!FLAGS_patterns.isEmpty()) {
         ctx.diffPatterns(FLAGS_patterns[0], FLAGS_patterns[1]);
     }

     // Output to the file specified
     if (!FLAGS_output.isEmpty()) {
         SkFILEWStream outputStream(FLAGS_output[0]);
         ctx.outputRecords(outputStream, FLAGS_jsonp);
     }

     if (!FLAGS_csv.isEmpty()) {
         SkFILEWStream outputStream(FLAGS_csv[0]);
         ctx.outputCsv(outputStream);
     }

     return 0;
 }

 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif
	/*
	* Copyright 2013 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	// TODO(djsollen): Rename this whole package (perhaps to "SkMultiDiffer").
	// It's not just for "pdiff" (perceptual diffs)--it's a harness that allows
	// the execution of an arbitrary set of difference algorithms.
	// See http://skbug.com/2711 ('rename skpdiff')

	#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
	#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 "SkTaskGroup.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, "", "Writes a JSON summary of these diffs to file: <filepath>");
	DEFINE_string(alphaDir, "", "If the differ can generate an alpha mask, write it into directory: <dirpath>");
	DEFINE_string(rgbDiffDir, "", "If the differ can generate an image showing the RGB diff at each pixel, write it into directory: <dirpath>");
	DEFINE_string(whiteDiffDir, "", "If the differ can generate an image showing every changed pixel in white, write it into directory: <dirpath>");
	DEFINE_bool(jsonp, true, "Output JSON with padding");
	DEFINE_string(csv, "", "Writes the output of these diffs to a csv file: <filepath>");
	DEFINE_int32(threads, -1, "run N threads in parallel [default is derived from CPUs available]");
	DEFINE_bool(longnames, false, "Output image names are a combination of baseline and test names");

	#if SK_SUPPORT_OPENCL
	/// A callback for any OpenCL errors
	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_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);
	if (contextErr != CL_SUCCESS) {
	SkDebugf("Context creation failed: %s\n", cl_error_to_string(contextErr));
	return false;
	}

	return true;
	}

	static bool init_cl_diff(SkImageDiffer* differ) {
	// Setup OpenCL
	cl::Device device;
	cl::Context context;
	if (!init_device_and_context(&device, &context)) {
	return false;
	}

	// Setup our differ of choice
	SkCLImageDiffer* clDiffer = (SkCLImageDiffer*)differ;
	return clDiffer->init(device(), context());
	}
	#endif

	// TODO Find a better home for the diff registry. One possibility is to have the differs self
	// register.

	// List here every differ
	SkDifferentPixelsMetric gDiffPixel;
	SkPMetric gPDiff;

	// A null terminated array of pointer to every differ declared above
	SkImageDiffer* gDiffers[] = { &gDiffPixel, &gPDiff, NULL };

	int tool_main(int argc, char * argv[]);
	int tool_main(int argc, char * argv[]) {
	// Setup command line parsing
	SkCommandLineFlags::SetUsage("Compare images using various metrics.");
	SkCommandLineFlags::Parse(argc, argv);

	// Needed by various Skia components
	SkAutoGraphics ag;
	SkTaskGroup::Enabler enabled;

	if (FLAGS_list) {
	SkDebugf("Available Metrics:\n");
	}

	// Figure which differs the user chose, and optionally print them if the user requests it
	SkTDArray<SkImageDiffer*> chosenDiffers;
	for (int differIndex = 0; gDiffers[differIndex]; differIndex++) {
	SkImageDiffer* differ = gDiffers[differIndex];
	if (FLAGS_list) {
	SkDebugf(" %s", differ->getName());
	SkDebugf("\n");
	}

	// Check if this differ was chosen by any of the flags. Initialize them if they were chosen.
	if (FLAGS_differs.isEmpty()) {
	// If no differs were chosen, they all get added
	if (differ->requiresOpenCL()) {
	#if SK_SUPPORT_OPENCL
	init_cl_diff(differ);
	chosenDiffers.push(differ);
	#endif
	} else {
	chosenDiffers.push(differ);
	}
	} else {
	for (int flagIndex = 0; flagIndex < FLAGS_differs.count(); flagIndex++) {
	if (SkString(FLAGS_differs[flagIndex]).equals(differ->getName())) {
	// Initialize OpenCL for the differ if it needs it and support was compiled in.
	if (differ->requiresOpenCL()) {
	#if SK_SUPPORT_OPENCL
	init_cl_diff(differ);
	chosenDiffers.push(differ);
	#endif
	} else {
	chosenDiffers.push(differ);
	}
	break;
	}
	}
	}
	}

	// Don't attempt to initialize the differ if we aren't going to use it
	if (FLAGS_folders.isEmpty() && FLAGS_patterns.isEmpty()) {
	return 0;
	}

	// Validate command line flags
	if (!FLAGS_folders.isEmpty()) {
	if (2 != FLAGS_folders.count()) {
	SkDebugf("Folders flag expects two arguments: <baseline folder> <test folder>\n");
	return 1;
	}
	}

	if (!FLAGS_patterns.isEmpty()) {
	if (2 != FLAGS_patterns.count()) {
	SkDebugf("Patterns flag expects two arguments: <baseline pattern> <test pattern>\n");
	return 1;
	}
	}

	if (!FLAGS_csv.isEmpty()) {
	if (1 != FLAGS_csv.count()) {
	SkDebugf("csv flag expects one argument: <csv file>\n");
	return 1;
	}
	}

	if (!FLAGS_alphaDir.isEmpty()) {
	if (1 != FLAGS_alphaDir.count()) {
	SkDebugf("alphaDir flag expects one argument: <directory>\n");
	return 1;
	}
	}
	if (!FLAGS_rgbDiffDir.isEmpty()) {
	if (1 != FLAGS_rgbDiffDir.count()) {
	SkDebugf("rgbDiffDir flag expects one argument: <directory>\n");
	return 1;
	}
	}

	if (!FLAGS_whiteDiffDir.isEmpty()) {
	if (1 != FLAGS_whiteDiffDir.count()) {
	SkDebugf("whiteDiffDir flag expects one argument: <directory>\n");
	return 1;
	}
	}

	SkDiffContext ctx;
	ctx.setDiffers(chosenDiffers);
	ctx.setLongNames(FLAGS_longnames);

	if (!FLAGS_alphaDir.isEmpty()) {
	ctx.setAlphaMaskDir(SkString(FLAGS_alphaDir[0]));
	}
	if (!FLAGS_rgbDiffDir.isEmpty()) {
	ctx.setRgbDiffDir(SkString(FLAGS_rgbDiffDir[0]));
	}
	if (!FLAGS_whiteDiffDir.isEmpty()) {
	ctx.setWhiteDiffDir(SkString(FLAGS_whiteDiffDir[0]));
	}

	if (FLAGS_threads >= 0) {
	ctx.setThreadCount(FLAGS_threads);
	}

	// Perform a folder diff if one is requested
	if (!FLAGS_folders.isEmpty()) {
	ctx.diffDirectories(FLAGS_folders[0], FLAGS_folders[1]);
	}

	// Perform a pattern diff if one is requested
	if (!FLAGS_patterns.isEmpty()) {
	ctx.diffPatterns(FLAGS_patterns[0], FLAGS_patterns[1]);
	}

	// Output to the file specified
	if (!FLAGS_output.isEmpty()) {
	SkFILEWStream outputStream(FLAGS_output[0]);
	ctx.outputRecords(outputStream, FLAGS_jsonp);
	}

	if (!FLAGS_csv.isEmpty()) {
	SkFILEWStream outputStream(FLAGS_csv[0]);
	ctx.outputCsv(outputStream);
	}

	return 0;
	}

	#if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
	int main(int argc, char * argv[]) {
	return tool_main(argc, (char**) argv);
	}
	#endif