blob: 50136780d88a618d367e11cb8fcf2507031750b5 [file] [log] [blame]
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkColorPriv.h"
#include "SkImageDecoder.h"
#include "SkImageEncoder.h"
#include "SkOSFile.h"
#include "SkStream.h"
#include "SkTDArray.h"
#include "SkTemplates.h"
#include "SkTime.h"
#include "SkTSearch.h"
#include "SkTypes.h"
/**
* skdiff
*
* Given three directory names, expects to find identically-named files in
* each of the first two; the first are treated as a set of baseline,
* the second a set of variant images, and a diff image is written into the
* third directory for each pair.
* Creates an index.html in the current third directory to compare each
* pair that does not match exactly.
* Does *not* recursively descend directories.
*
* With the --chromium flag, *does* recursively descend the first directory
* named, comparing *-expected.png with *-actual.png and writing diff
* images into the second directory, also writing index.html there.
*/
#if SK_BUILD_FOR_WIN32
#define PATH_DIV_STR "\\"
#define PATH_DIV_CHAR '\\'
#else
#define PATH_DIV_STR "/"
#define PATH_DIV_CHAR '/'
#endif
struct DiffRecord {
DiffRecord (const SkString filename,
const SkString basePath,
const SkString comparisonPath)
: fFilename (filename)
, fBasePath (basePath)
, fComparisonPath (comparisonPath)
, fBaseBitmap (new SkBitmap ())
, fComparisonBitmap (new SkBitmap ())
, fDifferenceBitmap (new SkBitmap ())
, fWhiteBitmap (new SkBitmap ())
, fBaseHeight (0)
, fBaseWidth (0)
, fFractionDifference (0)
, fWeightedFraction (0)
, fAverageMismatchR (0)
, fAverageMismatchG (0)
, fAverageMismatchB (0)
, fMaxMismatchR (0)
, fMaxMismatchG (0)
, fMaxMismatchB (0)
, fDoImageSizesMismatch (false) {
// These asserts are valid for GM, but not for --chromium
//SkASSERT(basePath.endsWith(filename.c_str()));
//SkASSERT(comparisonPath.endsWith(filename.c_str()));
};
SkString fFilename;
SkString fBasePath;
SkString fComparisonPath;
SkBitmap* fBaseBitmap;
SkBitmap* fComparisonBitmap;
SkBitmap* fDifferenceBitmap;
SkBitmap* fWhiteBitmap;
int fBaseHeight;
int fBaseWidth;
/// Arbitrary floating-point metric to be used to sort images from most
/// to least different from baseline; values of 0 will be omitted from the
/// summary webpage.
float fFractionDifference;
float fWeightedFraction;
float fAverageMismatchR;
float fAverageMismatchG;
float fAverageMismatchB;
uint32_t fMaxMismatchR;
uint32_t fMaxMismatchG;
uint32_t fMaxMismatchB;
/// By the time we need to report image size mismatch, we've already
/// released the bitmaps, so we need to remember it when we detect it.
bool fDoImageSizesMismatch;
};
#define MAX2(a,b) (((b) < (a)) ? (a) : (b))
#define MAX3(a,b,c) (((b) < (a)) ? MAX2((a), (c)) : MAX2((b), (c)))
const SkPMColor PMCOLOR_WHITE = SkPreMultiplyColor(SK_ColorWHITE);
const SkPMColor PMCOLOR_BLACK = SkPreMultiplyColor(SK_ColorBLACK);
struct DiffSummary {
DiffSummary ()
: fNumMatches (0)
, fNumMismatches (0)
, fMaxMismatchV (0)
, fMaxMismatchPercent (0) { };
uint32_t fNumMatches;
uint32_t fNumMismatches;
uint32_t fMaxMismatchV;
float fMaxMismatchPercent;
void print () {
printf("%d of %d images matched.\n", fNumMatches,
fNumMatches + fNumMismatches);
if (fNumMismatches > 0) {
printf("Maximum pixel intensity mismatch %d\n", fMaxMismatchV);
printf("Largest area mismatch was %.2f%% of pixels\n",
fMaxMismatchPercent);
}
}
void add (DiffRecord* drp) {
if (0 == drp->fFractionDifference) {
fNumMatches++;
} else {
fNumMismatches++;
if (drp->fFractionDifference * 100 > fMaxMismatchPercent) {
fMaxMismatchPercent = drp->fFractionDifference * 100;
}
uint32_t value = MAX3(drp->fMaxMismatchR, drp->fMaxMismatchG,
drp->fMaxMismatchB);
if (value > fMaxMismatchV) {
fMaxMismatchV = value;
}
}
}
};
typedef SkTDArray<DiffRecord*> RecordArray;
/// Comparison routine for qsort; sorts by fFractionDifference
/// from largest to smallest.
static int compare_diff_metrics (DiffRecord** lhs, DiffRecord** rhs) {
if ((*lhs)->fFractionDifference < (*rhs)->fFractionDifference) {
return 1;
}
if ((*rhs)->fFractionDifference < (*lhs)->fFractionDifference) {
return -1;
}
return 0;
}
static int compare_diff_weighted (DiffRecord** lhs, DiffRecord** rhs) {
if ((*lhs)->fWeightedFraction < (*rhs)->fWeightedFraction) {
return 1;
}
if ((*lhs)->fWeightedFraction > (*rhs)->fWeightedFraction) {
return -1;
}
return 0;
}
/// Comparison routine for qsort; sorts by max(fAverageMismatch{RGB})
/// from largest to smallest.
static int compare_diff_mean_mismatches (DiffRecord** lhs, DiffRecord** rhs) {
float leftValue = MAX3((*lhs)->fAverageMismatchR,
(*lhs)->fAverageMismatchG,
(*lhs)->fAverageMismatchB);
float rightValue = MAX3((*rhs)->fAverageMismatchR,
(*rhs)->fAverageMismatchG,
(*rhs)->fAverageMismatchB);
if (leftValue < rightValue) {
return 1;
}
if (rightValue < leftValue) {
return -1;
}
return 0;
}
/// Comparison routine for qsort; sorts by max(fMaxMismatch{RGB})
/// from largest to smallest.
static int compare_diff_max_mismatches (DiffRecord** lhs, DiffRecord** rhs) {
uint32_t leftValue = MAX3((*lhs)->fMaxMismatchR,
(*lhs)->fMaxMismatchG,
(*lhs)->fMaxMismatchB);
uint32_t rightValue = MAX3((*rhs)->fMaxMismatchR,
(*rhs)->fMaxMismatchG,
(*rhs)->fMaxMismatchB);
if (leftValue < rightValue) {
return 1;
}
if (rightValue < leftValue) {
return -1;
}
return compare_diff_mean_mismatches(lhs, rhs);
}
/// Parameterized routine to compute the color of a pixel in a difference image.
typedef SkPMColor (*DiffMetricProc)(SkPMColor, SkPMColor);
static void expand_and_copy (int width, int height, SkBitmap** dest) {
SkBitmap* temp = new SkBitmap ();
temp->reset();
temp->setConfig((*dest)->config(), width, height);
temp->allocPixels();
(*dest)->copyPixelsTo(temp->getPixels(), temp->getSize(),
temp->rowBytes());
*dest = temp;
}
static bool get_bitmaps (DiffRecord* diffRecord) {
SkFILEStream compareStream(diffRecord->fComparisonPath.c_str());
if (!compareStream.isValid()) {
SkDebugf("WARNING: couldn't open comparison file <%s>\n",
diffRecord->fComparisonPath.c_str());
return false;
}
SkFILEStream baseStream(diffRecord->fBasePath.c_str());
if (!baseStream.isValid()) {
SkDebugf("ERROR: couldn't open base file <%s>\n",
diffRecord->fBasePath.c_str());
return false;
}
SkImageDecoder* codec = SkImageDecoder::Factory(&baseStream);
if (NULL == codec) {
SkDebugf("ERROR: no codec found for <%s>\n",
diffRecord->fBasePath.c_str());
return false;
}
// In debug, the DLL will automatically be unloaded when this is deleted,
// but that shouldn't be a problem in release mode.
SkAutoTDelete<SkImageDecoder> ad(codec);
baseStream.rewind();
if (!codec->decode(&baseStream, diffRecord->fBaseBitmap,
SkBitmap::kARGB_8888_Config,
SkImageDecoder::kDecodePixels_Mode)) {
SkDebugf("ERROR: codec failed for <%s>\n",
diffRecord->fBasePath.c_str());
return false;
}
diffRecord->fBaseWidth = diffRecord->fBaseBitmap->width();
diffRecord->fBaseHeight = diffRecord->fBaseBitmap->height();
if (!codec->decode(&compareStream, diffRecord->fComparisonBitmap,
SkBitmap::kARGB_8888_Config,
SkImageDecoder::kDecodePixels_Mode)) {
SkDebugf("ERROR: codec failed for <%s>\n",
diffRecord->fComparisonPath.c_str());
return false;
}
return true;
}
// from gm - thanks to PNG, we need to force all pixels 100% opaque
static void force_all_opaque(const SkBitmap& bitmap) {
SkAutoLockPixels lock(bitmap);
for (int y = 0; y < bitmap.height(); y++) {
for (int x = 0; x < bitmap.width(); x++) {
*bitmap.getAddr32(x, y) |= (SK_A32_MASK << SK_A32_SHIFT);
}
}
}
// from gm
static bool write_bitmap(const SkString& path, const SkBitmap* bitmap) {
SkBitmap copy;
bitmap->copyTo(&copy, SkBitmap::kARGB_8888_Config);
force_all_opaque(copy);
return SkImageEncoder::EncodeFile(path.c_str(), copy,
SkImageEncoder::kPNG_Type, 100);
}
// from gm
static inline SkPMColor compute_diff_pmcolor(SkPMColor c0, SkPMColor c1) {
int dr = SkGetPackedR32(c0) - SkGetPackedR32(c1);
int dg = SkGetPackedG32(c0) - SkGetPackedG32(c1);
int db = SkGetPackedB32(c0) - SkGetPackedB32(c1);
return SkPackARGB32(0xFF, SkAbs32(dr), SkAbs32(dg), SkAbs32(db));
}
static inline bool colors_match_thresholded(SkPMColor c0, SkPMColor c1,
const int threshold) {
int da = SkGetPackedA32(c0) - SkGetPackedA32(c1);
int dr = SkGetPackedR32(c0) - SkGetPackedR32(c1);
int dg = SkGetPackedG32(c0) - SkGetPackedG32(c1);
int db = SkGetPackedB32(c0) - SkGetPackedB32(c1);
return ((SkAbs32(da) <= threshold) &&
(SkAbs32(dr) <= threshold) &&
(SkAbs32(dg) <= threshold) &&
(SkAbs32(db) <= threshold));
}
// based on gm
static void compute_diff(DiffRecord* dr,
DiffMetricProc diffFunction,
const int colorThreshold) {
SkAutoLockPixels alpDiff(*dr->fDifferenceBitmap);
SkAutoLockPixels alpWhite(*dr->fWhiteBitmap);
const int w = dr->fComparisonBitmap->width();
const int h = dr->fComparisonBitmap->height();
int mismatchedPixels = 0;
int totalMismatchR = 0;
int totalMismatchG = 0;
int totalMismatchB = 0;
if (w != dr->fBaseWidth || h != dr->fBaseHeight) {
dr->fDoImageSizesMismatch = true;
dr->fFractionDifference = 1;
return;
}
// Accumulate fractionally different pixels, then divide out
// # of pixels at the end.
dr->fWeightedFraction = 0;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
SkPMColor c0 = *dr->fBaseBitmap->getAddr32(x, y);
SkPMColor c1 = *dr->fComparisonBitmap->getAddr32(x, y);
SkPMColor trueDifference = compute_diff_pmcolor(c0, c1);
SkPMColor outputDifference = diffFunction(c0, c1);
uint32_t thisR = SkGetPackedR32(trueDifference);
uint32_t thisG = SkGetPackedG32(trueDifference);
uint32_t thisB = SkGetPackedB32(trueDifference);
totalMismatchR += thisR;
totalMismatchG += thisG;
totalMismatchB += thisB;
// In HSV, value is defined as max RGB component.
int value = MAX3(thisR, thisG, thisB);
dr->fWeightedFraction += ((float) value) / 255;
if (thisR > dr->fMaxMismatchR) {
dr->fMaxMismatchR = thisR;
}
if (thisG > dr->fMaxMismatchG) {
dr->fMaxMismatchG = thisG;
}
if (thisB > dr->fMaxMismatchB) {
dr->fMaxMismatchB = thisB;
}
if (!colors_match_thresholded(c0, c1, colorThreshold)) {
mismatchedPixels++;
*dr->fDifferenceBitmap->getAddr32(x, y) = outputDifference;
*dr->fWhiteBitmap->getAddr32(x, y) = PMCOLOR_WHITE;
} else {
*dr->fDifferenceBitmap->getAddr32(x, y) = 0;
*dr->fWhiteBitmap->getAddr32(x, y) = PMCOLOR_BLACK;
}
}
}
int pixelCount = w * h;
dr->fFractionDifference = ((float) mismatchedPixels) / pixelCount;
dr->fWeightedFraction /= pixelCount;
dr->fAverageMismatchR = ((float) totalMismatchR) / pixelCount;
dr->fAverageMismatchG = ((float) totalMismatchG) / pixelCount;
dr->fAverageMismatchB = ((float) totalMismatchB) / pixelCount;
}
static SkString filename_to_derived_filename (const SkString& filename,
const char *suffix) {
SkString diffName (filename);
const char* cstring = diffName.c_str();
int dotOffset = strrchr(cstring, '.') - cstring;
diffName.remove(dotOffset, diffName.size() - dotOffset);
diffName.append(suffix);
return diffName;
}
/// Given a image filename, returns the name of the file containing the
/// associated difference image.
static SkString filename_to_diff_filename (const SkString& filename) {
return filename_to_derived_filename(filename, "-diff.png");
}
/// Given a image filename, returns the name of the file containing the
/// "white" difference image.
static SkString filename_to_white_filename (const SkString& filename) {
return filename_to_derived_filename(filename, "-white.png");
}
/// Convert a chromium/WebKit LayoutTest "foo-expected.png" to "foo-actual.png"
static SkString chrome_expected_path_to_actual (const SkString& expected) {
SkString actualPath (expected);
actualPath.remove(actualPath.size() - 13, 13);
actualPath.append("-actual.png");
return actualPath;
}
/// Convert a chromium/WebKit LayoutTest "foo-expected.png" to "foo.png"
static SkString chrome_expected_name_to_short (const SkString& expected) {
SkString shortName (expected);
shortName.remove(shortName.size() - 13, 13);
shortName.append(".png");
return shortName;
}
static void release_bitmaps(DiffRecord* drp) {
delete drp->fBaseBitmap;
drp->fBaseBitmap = NULL;
delete drp->fComparisonBitmap;
drp->fComparisonBitmap = NULL;
delete drp->fDifferenceBitmap;
drp->fDifferenceBitmap = NULL;
delete drp->fWhiteBitmap;
drp->fWhiteBitmap = NULL;
}
static void create_and_write_diff_image(DiffRecord* drp,
DiffMetricProc dmp,
const int colorThreshold,
const SkString& outputDir,
const SkString& filename) {
const int w = drp->fBaseWidth;
const int h = drp->fBaseHeight;
drp->fDifferenceBitmap->setConfig(SkBitmap::kARGB_8888_Config, w, h);
drp->fDifferenceBitmap->allocPixels();
drp->fWhiteBitmap->setConfig(SkBitmap::kARGB_8888_Config, w, h);
drp->fWhiteBitmap->allocPixels();
compute_diff(drp, dmp, colorThreshold);
SkString differencePath (outputDir);
differencePath.append(filename_to_diff_filename(filename));
write_bitmap(differencePath, drp->fDifferenceBitmap);
SkString whitePath (outputDir);
whitePath.append(filename_to_white_filename(filename));
write_bitmap(whitePath, drp->fWhiteBitmap);
release_bitmaps(drp);
}
/// Creates difference images, returns the number that have a 0 metric.
static void create_diff_images (DiffMetricProc dmp,
const int colorThreshold,
RecordArray* differences,
const SkString& baseDir,
const SkString& comparisonDir,
const SkString& outputDir,
DiffSummary* summary) {
//@todo thudson 19 Apr 2011
// this lets us know about files in baseDir not in compareDir, but it
// doesn't detect files in compareDir not in baseDir. Doing that
// efficiently seems to imply iterating through both directories to
// create a merged list, and then attempting to process every entry
// in that list?
SkOSFile::Iter baseIterator (baseDir.c_str());
SkString filename;
while (baseIterator.next(&filename)) {
if (filename.endsWith(".pdf")) {
continue;
}
SkString basePath (baseDir);
basePath.append(filename);
SkString comparisonPath (comparisonDir);
comparisonPath.append(filename);
DiffRecord * drp = new DiffRecord (filename, basePath, comparisonPath);
if (!get_bitmaps(drp)) {
continue;
}
create_and_write_diff_image(drp, dmp, colorThreshold,
outputDir, filename);
differences->push(drp);
summary->add(drp);
}
}
static void create_diff_images_chromium (DiffMetricProc dmp,
const int colorThreshold,
RecordArray* differences,
const SkString& dirname,
const SkString& outputDir,
DiffSummary* summary) {
SkOSFile::Iter baseIterator (dirname.c_str());
SkString filename;
while (baseIterator.next(&filename)) {
if (filename.endsWith(".pdf")) {
continue;
}
if (filename.endsWith("-expected.png")) {
SkString expectedPath (dirname);
expectedPath.append(filename);
SkString shortName (chrome_expected_name_to_short(filename));
SkString actualPath (chrome_expected_path_to_actual(expectedPath));
DiffRecord * drp =
new DiffRecord (shortName, expectedPath, actualPath);
if (!get_bitmaps(drp)) {
continue;
}
create_and_write_diff_image(drp, dmp, colorThreshold,
outputDir, shortName);
differences->push(drp);
summary->add(drp);
}
}
}
static void analyze_chromium(DiffMetricProc dmp,
const int colorThreshold,
RecordArray* differences,
const SkString& dirname,
const SkString& outputDir,
DiffSummary* summary) {
create_diff_images_chromium(dmp, colorThreshold, differences,
dirname, outputDir, summary);
SkOSFile::Iter dirIterator(dirname.c_str());
SkString newdirname;
while (dirIterator.next(&newdirname, true)) {
if (newdirname.startsWith(".")) {
continue;
}
SkString fullname (dirname);
fullname.append(newdirname);
if (!fullname.endsWith(PATH_DIV_STR)) {
fullname.append(PATH_DIV_STR);
}
analyze_chromium(dmp, colorThreshold, differences,
fullname, outputDir, summary);
}
}
/// Make layout more consistent by scaling image to 240 height, 360 width,
/// or natural size, whichever is smallest.
static int compute_image_height (int height, int width) {
int retval = 240;
if (height < retval) {
retval = height;
}
float scale = (float) retval / height;
if (width * scale > 360) {
scale = (float) 360 / width;
retval = static_cast<int>(height * scale);
}
return retval;
}
static void print_table_header (SkFILEWStream* stream,
const int matchCount,
const int colorThreshold,
const RecordArray& differences,
const SkString &baseDir,
const SkString &comparisonDir) {
SkTime::DateTime dt;
SkTime::GetDateTime(&dt);
stream->writeText("<table>\n");
stream->writeText("<tr><th>");
stream->writeText("SkDiff run at ");
stream->writeDecAsText(dt.fHour);
stream->writeText(":");
if (dt.fMinute < 10) {
stream->writeText("0");
}
stream->writeDecAsText(dt.fMinute);
stream->writeText(":");
if (dt.fSecond < 10) {
stream->writeText("0");
}
stream->writeDecAsText(dt.fSecond);
stream->writeText("<br>");
stream->writeDecAsText(matchCount);
stream->writeText(" of ");
stream->writeDecAsText(differences.count());
stream->writeText(" images matched ");
if (colorThreshold == 0) {
stream->writeText("exactly");
} else {
stream->writeText("within ");
stream->writeDecAsText(colorThreshold);
stream->writeText(" color units per component");
}
stream->writeText(".<br>");
stream->writeText("</th>\n<th>");
stream->writeText("every different pixel shown in white");
stream->writeText("</th>\n<th>");
stream->writeText("color difference at each pixel");
stream->writeText("</th>\n<th>");
stream->writeText(baseDir.c_str());
stream->writeText("</th>\n<th>");
stream->writeText(comparisonDir.c_str());
stream->writeText("</th>\n");
stream->writeText("</tr>\n");
}
static void print_pixel_count (SkFILEWStream* stream,
const DiffRecord& diff) {
stream->writeText("<br>(");
stream->writeDecAsText(static_cast<int>(diff.fFractionDifference *
diff.fBaseWidth *
diff.fBaseHeight));
stream->writeText(" pixels)");
/*
stream->writeDecAsText(diff.fWeightedFraction *
diff.fBaseWidth *
diff.fBaseHeight);
stream->writeText(" weighted pixels)");
*/
}
static void print_label_cell (SkFILEWStream* stream,
const DiffRecord& diff) {
stream->writeText("<td>");
stream->writeText(diff.fFilename.c_str());
stream->writeText("<br>");
if (diff.fDoImageSizesMismatch) {
stream->writeText("Image sizes differ");
stream->writeText("</td>");
return;
}
char metricBuf [20];
sprintf(metricBuf, "%12.4f%%", 100 * diff.fFractionDifference);
stream->writeText(metricBuf);
stream->writeText(" of pixels differ");
stream->writeText("\n (");
sprintf(metricBuf, "%12.4f%%", 100 * diff.fWeightedFraction);
stream->writeText(metricBuf);
stream->writeText(" weighted)");
// Write the actual number of pixels that differ if it's < 1%
if (diff.fFractionDifference < 0.01) {
print_pixel_count(stream, diff);
}
stream->writeText("<br>Average color mismatch ");
stream->writeDecAsText(static_cast<int>(MAX3(diff.fAverageMismatchR,
diff.fAverageMismatchG,
diff.fAverageMismatchB)));
stream->writeText("<br>Max color mismatch ");
stream->writeDecAsText(MAX3(diff.fMaxMismatchR,
diff.fMaxMismatchG,
diff.fMaxMismatchB));
stream->writeText("</td>");
}
static void print_image_cell (SkFILEWStream* stream,
const SkString& path,
int height) {
stream->writeText("<td><a href=\"");
stream->writeText(path.c_str());
stream->writeText("\"><img src=\"");
stream->writeText(path.c_str());
stream->writeText("\" height=\"");
stream->writeDecAsText(height);
stream->writeText("px\"></a></td>");
}
static void print_diff_page (const int matchCount,
const int colorThreshold,
const RecordArray& differences,
const SkString& baseDir,
const SkString& comparisonDir,
const SkString& outputDir) {
SkString outputPath (outputDir);
outputPath.append("index.html");
//SkFILEWStream outputStream ("index.html");
SkFILEWStream outputStream (outputPath.c_str());
// Need to convert paths from relative-to-cwd to relative-to-outputDir
// FIXME this doesn't work if there are '..' inside the outputDir
unsigned int ui;
SkString relativePath;
for (ui = 0; ui < outputDir.size(); ui++) {
if (outputDir[ui] == PATH_DIV_CHAR) {
relativePath.append(".." PATH_DIV_STR);
}
}
outputStream.writeText("<html>\n<body>\n");
print_table_header(&outputStream, matchCount, colorThreshold, differences,
baseDir, comparisonDir);
int i;
for (i = 0; i < differences.count(); i++) {
DiffRecord* diff = differences[i];
if (0 == diff->fFractionDifference) {
continue;
}
if (!diff->fBasePath.startsWith(PATH_DIV_STR)) {
diff->fBasePath.prepend(relativePath);
}
if (!diff->fComparisonPath.startsWith(PATH_DIV_STR)) {
diff->fComparisonPath.prepend(relativePath);
}
int height = compute_image_height(diff->fBaseHeight, diff->fBaseWidth);
outputStream.writeText("<tr>\n");
print_label_cell(&outputStream, *diff);
print_image_cell(&outputStream,
filename_to_white_filename(diff->fFilename), height);
print_image_cell(&outputStream,
filename_to_diff_filename(diff->fFilename), height);
print_image_cell(&outputStream, diff->fBasePath, height);
print_image_cell(&outputStream, diff->fComparisonPath, height);
outputStream.writeText("</tr>\n");
outputStream.flush();
}
outputStream.writeText("</table>\n");
outputStream.writeText("</body>\n</html>\n");
outputStream.flush();
}
static void usage (char * argv0) {
SkDebugf("Skia baseline image diff tool\n");
SkDebugf("Usage: %s baseDir comparisonDir [outputDir]\n", argv0);
SkDebugf(
" %s --chromium --release|--debug baseDir outputDir\n", argv0);
SkDebugf(
" --threshold n: only report differences > n (in one channel) [default 0]\n"
" --sortbymismatch: sort by average color channel mismatch\n");
SkDebugf(
" --sortbymaxmismatch: sort by worst color channel mismatch,\n"
" break ties with -sortbymismatch,\n"
" [default by fraction of pixels mismatching]\n");
SkDebugf(
" --weighted: sort by # pixels different weighted by color difference\n");
SkDebugf(
" --chromium-release: process Webkit LayoutTests results instead of gm\n"
" --chromium-debug: process Webkit LayoutTests results instead of gm\n");
SkDebugf(
" baseDir: directory to read baseline images from,\n"
" or chromium/src directory for --chromium.\n");
SkDebugf(" comparisonDir: directory to read comparison images from\n");
SkDebugf(
" outputDir: directory to write difference images to; defaults to\n"
" comparisonDir when not running --chromium\n");
SkDebugf("Also creates an \"index.html\" file in the output directory.\n");
}
int main (int argc, char ** argv) {
DiffMetricProc diffProc = compute_diff_pmcolor;
SkQSortCompareProc sortProc = (SkQSortCompareProc) compare_diff_metrics;
// Maximum error tolerated in any one color channel in any one pixel before
// a difference is reported.
int colorThreshold = 0;
SkString baseDir;
SkString comparisonDir;
SkString outputDir;
bool analyzeChromium = false;
bool chromiumDebug = false;
bool chromiumRelease = false;
RecordArray differences;
DiffSummary summary;
int i, j;
for (i = 1, j = 0; i < argc; i++) {
if (!strcmp(argv[i], "--help")) {
usage(argv[0]);
return 0;
}
if (!strcmp(argv[i], "--sortbymismatch")) {
sortProc = (SkQSortCompareProc) compare_diff_mean_mismatches;
continue;
}
if (!strcmp(argv[i], "--sortbymaxmismatch")) {
sortProc = (SkQSortCompareProc) compare_diff_max_mismatches;
continue;
}
if (!strcmp(argv[i], "--weighted")) {
sortProc = (SkQSortCompareProc) compare_diff_weighted;
continue;
}
if (!strcmp(argv[i], "--chromium-release")) {
analyzeChromium = true;
chromiumRelease = true;
continue;
}
if (!strcmp(argv[i], "--chromium-debug")) {
analyzeChromium = true;
chromiumDebug = true;
continue;
}
if (argv[i][0] != '-') {
switch (j++) {
case 0:
baseDir.set(argv[i]);
continue;
case 1:
comparisonDir.set(argv[i]);
continue;
case 2:
outputDir.set(argv[i]);
continue;
default:
usage(argv[0]);
return 0;
}
}
SkDebugf("Unrecognized argument <%s>\n", argv[i]);
usage(argv[0]);
return 0;
}
if (analyzeChromium) {
if (j != 2) {
usage(argv[0]);
return 0;
}
if (chromiumRelease && chromiumDebug) {
SkDebugf(
"--chromium must be either -release or -debug, not both!\n");
return 0;
}
}
if (j == 2) {
outputDir = comparisonDir;
} else if (j != 3) {
usage(argv[0]);
return 0;
}
if (!baseDir.endsWith(PATH_DIV_STR)) {
baseDir.append(PATH_DIV_STR);
}
if (!comparisonDir.endsWith(PATH_DIV_STR)) {
comparisonDir.append(PATH_DIV_STR);
}
if (!outputDir.endsWith(PATH_DIV_STR)) {
outputDir.append(PATH_DIV_STR);
}
if (analyzeChromium) {
baseDir.append("webkit" PATH_DIV_STR);
if (chromiumRelease) {
baseDir.append("Release" PATH_DIV_STR);
}
if (chromiumDebug) {
baseDir.append("Debug" PATH_DIV_STR);
}
baseDir.append("layout-test-results" PATH_DIV_STR);
analyze_chromium(diffProc, colorThreshold, &differences,
baseDir, outputDir, &summary);
} else {
create_diff_images(diffProc, colorThreshold, &differences,
baseDir, comparisonDir, outputDir, &summary);
}
summary.print();
if (differences.count()) {
SkQSort(differences.begin(), differences.count(),
sizeof(DiffRecord*), sortProc);
}
print_diff_page(summary.fNumMatches, colorThreshold, differences,
baseDir, comparisonDir, outputDir);
for (i = 0; i < differences.count(); i++) {
delete differences[i];
}
}