2 * Copyright 2013 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 // TODO(djsollen): Rename this whole package (perhaps to "SkMultiDiffer").
9 // It's not just for "pdiff" (perceptual diffs)--it's a harness that allows
10 // the execution of an arbitrary set of difference algorithms.
11 // See http://skbug.com/2711 ('rename skpdiff')
15 #define __NO_STD_VECTOR // Uses cl::vectpr instead of std::vectpr
16 #define __NO_STD_STRING // Uses cl::STRING_CLASS instead of std::string
17 #if defined(SK_BUILD_FOR_MAC)
18 // Note that some macs don't have this header and it can be downloaded from the Khronos registry
19 # include <OpenCL/cl.hpp>
26 #include "SkCommandLineFlags.h"
27 #include "SkGraphics.h"
29 #include "SkTDArray.h"
30 #include "SkTaskGroup.h"
32 #include "SkDifferentPixelsMetric.h"
33 #include "SkDiffContext.h"
34 #include "SkImageDiffer.h"
35 #include "SkPMetric.h"
36 #include "skpdiff_util.h"
38 #include "SkForceLinking.h"
39 __SK_FORCE_IMAGE_DECODER_LINKING;
41 // Command line argument definitions go here
42 DEFINE_bool2(list, l, false, "List out available differs");
43 DEFINE_string2(differs, d, "", "The names of the differs to use or all of them by default");
44 DEFINE_string2(folders, f, "", "Compare two folders with identical subfile names: <baseline folder> <test folder>");
45 DEFINE_string2(patterns, p, "", "Use two patterns to compare images: <baseline> <test>");
46 DEFINE_string2(output, o, "", "Writes a JSON summary of these diffs to file: <filepath>");
47 DEFINE_string(alphaDir, "", "If the differ can generate an alpha mask, write it into directory: <dirpath>");
48 DEFINE_string(rgbDiffDir, "", "If the differ can generate an image showing the RGB diff at each pixel, write it into directory: <dirpath>");
49 DEFINE_string(whiteDiffDir, "", "If the differ can generate an image showing every changed pixel in white, write it into directory: <dirpath>");
50 DEFINE_bool(jsonp, true, "Output JSON with padding");
51 DEFINE_string(csv, "", "Writes the output of these diffs to a csv file: <filepath>");
52 DEFINE_int32(threads, -1, "run N threads in parallel [default is derived from CPUs available]");
53 DEFINE_bool(longnames, false, "Output image names are a combination of baseline and test names");
56 /// A callback for any OpenCL errors
57 static void CL_CALLBACK error_notify(const char* errorInfo, const void* privateInfoSize, ::size_t cb, void* userData) {
58 SkDebugf("OpenCL error notify: %s\n", errorInfo);
62 /// Creates a device and context with OpenCL
63 static bool init_device_and_context(cl::Device* device, cl::Context* context) {
64 // Query for a platform
65 cl::vector<cl::Platform> platformList;
66 cl::Platform::get(&platformList);
67 SkDebugf("The number of platforms is %u\n", platformList.size());
69 // Print some information about the platform for debugging
70 cl::Platform& platform = platformList[0];
71 cl::STRING_CLASS platformName;
72 platform.getInfo(CL_PLATFORM_NAME, &platformName);
73 SkDebugf("Platform index 0 is named %s\n", platformName.c_str());
76 cl::vector<cl::Device> deviceList;
77 platform.getDevices(CL_DEVICE_TYPE_ALL, &deviceList);
78 SkDebugf("The number of devices is %u\n", deviceList.size());
80 // Print some information about the device for debugging
81 *device = deviceList[0];
82 cl::STRING_CLASS deviceName;
83 device->getInfo(CL_DEVICE_NAME, &deviceName);
84 SkDebugf("Device index 0 is named %s\n", deviceName.c_str());
86 // Create a CL context and check for all errors
87 cl_int contextErr = CL_SUCCESS;
88 *context = cl::Context(deviceList, NULL, error_notify, NULL, &contextErr);
89 if (contextErr != CL_SUCCESS) {
90 SkDebugf("Context creation failed: %s\n", cl_error_to_string(contextErr));
97 static bool init_cl_diff(SkImageDiffer* differ) {
101 if (!init_device_and_context(&device, &context)) {
105 // Setup our differ of choice
106 SkCLImageDiffer* clDiffer = (SkCLImageDiffer*)differ;
107 return clDiffer->init(device(), context());
111 // TODO Find a better home for the diff registry. One possibility is to have the differs self
114 // List here every differ
115 SkDifferentPixelsMetric gDiffPixel;
118 // A null terminated array of pointer to every differ declared above
119 SkImageDiffer* gDiffers[] = { &gDiffPixel, &gPDiff, NULL };
121 int tool_main(int argc, char * argv[]);
122 int tool_main(int argc, char * argv[]) {
123 // Setup command line parsing
124 SkCommandLineFlags::SetUsage("Compare images using various metrics.");
125 SkCommandLineFlags::Parse(argc, argv);
127 // Needed by various Skia components
129 SkTaskGroup::Enabler enabled;
132 SkDebugf("Available Metrics:\n");
135 // Figure which differs the user chose, and optionally print them if the user requests it
136 SkTDArray<SkImageDiffer*> chosenDiffers;
137 for (int differIndex = 0; gDiffers[differIndex]; differIndex++) {
138 SkImageDiffer* differ = gDiffers[differIndex];
140 SkDebugf(" %s", differ->getName());
144 // Check if this differ was chosen by any of the flags. Initialize them if they were chosen.
145 if (FLAGS_differs.isEmpty()) {
146 // If no differs were chosen, they all get added
147 if (differ->requiresOpenCL()) {
148 #if SK_SUPPORT_OPENCL
149 init_cl_diff(differ);
150 chosenDiffers.push(differ);
153 chosenDiffers.push(differ);
156 for (int flagIndex = 0; flagIndex < FLAGS_differs.count(); flagIndex++) {
157 if (SkString(FLAGS_differs[flagIndex]).equals(differ->getName())) {
158 // Initialize OpenCL for the differ if it needs it and support was compiled in.
159 if (differ->requiresOpenCL()) {
160 #if SK_SUPPORT_OPENCL
161 init_cl_diff(differ);
162 chosenDiffers.push(differ);
165 chosenDiffers.push(differ);
173 // Don't attempt to initialize the differ if we aren't going to use it
174 if (FLAGS_folders.isEmpty() && FLAGS_patterns.isEmpty()) {
178 // Validate command line flags
179 if (!FLAGS_folders.isEmpty()) {
180 if (2 != FLAGS_folders.count()) {
181 SkDebugf("Folders flag expects two arguments: <baseline folder> <test folder>\n");
186 if (!FLAGS_patterns.isEmpty()) {
187 if (2 != FLAGS_patterns.count()) {
188 SkDebugf("Patterns flag expects two arguments: <baseline pattern> <test pattern>\n");
193 if (!FLAGS_csv.isEmpty()) {
194 if (1 != FLAGS_csv.count()) {
195 SkDebugf("csv flag expects one argument: <csv file>\n");
200 if (!FLAGS_alphaDir.isEmpty()) {
201 if (1 != FLAGS_alphaDir.count()) {
202 SkDebugf("alphaDir flag expects one argument: <directory>\n");
206 if (!FLAGS_rgbDiffDir.isEmpty()) {
207 if (1 != FLAGS_rgbDiffDir.count()) {
208 SkDebugf("rgbDiffDir flag expects one argument: <directory>\n");
213 if (!FLAGS_whiteDiffDir.isEmpty()) {
214 if (1 != FLAGS_whiteDiffDir.count()) {
215 SkDebugf("whiteDiffDir flag expects one argument: <directory>\n");
221 ctx.setDiffers(chosenDiffers);
222 ctx.setLongNames(FLAGS_longnames);
224 if (!FLAGS_alphaDir.isEmpty()) {
225 ctx.setAlphaMaskDir(SkString(FLAGS_alphaDir[0]));
227 if (!FLAGS_rgbDiffDir.isEmpty()) {
228 ctx.setRgbDiffDir(SkString(FLAGS_rgbDiffDir[0]));
230 if (!FLAGS_whiteDiffDir.isEmpty()) {
231 ctx.setWhiteDiffDir(SkString(FLAGS_whiteDiffDir[0]));
234 if (FLAGS_threads >= 0) {
235 ctx.setThreadCount(FLAGS_threads);
238 // Perform a folder diff if one is requested
239 if (!FLAGS_folders.isEmpty()) {
240 ctx.diffDirectories(FLAGS_folders[0], FLAGS_folders[1]);
243 // Perform a pattern diff if one is requested
244 if (!FLAGS_patterns.isEmpty()) {
245 ctx.diffPatterns(FLAGS_patterns[0], FLAGS_patterns[1]);
248 // Output to the file specified
249 if (!FLAGS_output.isEmpty()) {
250 SkFILEWStream outputStream(FLAGS_output[0]);
251 ctx.outputRecords(outputStream, FLAGS_jsonp);
254 if (!FLAGS_csv.isEmpty()) {
255 SkFILEWStream outputStream(FLAGS_csv[0]);
256 ctx.outputCsv(outputStream);
262 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
263 int main(int argc, char * argv[]) {
264 return tool_main(argc, (char**) argv);