зеркало из https://github.com/mozilla/moz-skia.git
654 строки
22 KiB
C++
654 строки
22 KiB
C++
#include "SkColorPriv.h"
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#include "SkImageDecoder.h"
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#include "SkImageEncoder.h"
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#include "SkOSFile.h"
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#include "SkStream.h"
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#include "SkTDArray.h"
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#include "SkTemplates.h"
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#include "SkTime.h"
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#include "SkTSearch.h"
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#include "SkTypes.h"
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/**
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* skdiff
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*
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* Given three directory names, expects to find identically-named files in
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* each of the first two; the first are treated as a set of baseline,
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* the second a set of variant images, and a diff image is written into the
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* third directory for each pair.
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* Creates an index.html in the current working directory to compare each
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* pair that does not match exactly.
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* Does *not* recursively descend directories.
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*/
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struct DiffRecord {
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DiffRecord (const SkString filename,
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const SkString basePath,
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const SkString comparisonPath)
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: fFilename (filename)
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, fBasePath (basePath)
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, fComparisonPath (comparisonPath)
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, fFractionDifference (0)
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, fWeightedFraction (0)
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, fAverageMismatchR (0)
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, fAverageMismatchG (0)
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, fAverageMismatchB (0)
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, fMaxMismatchR (0)
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, fMaxMismatchG (0)
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, fMaxMismatchB (0) {
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SkASSERT(basePath.endsWith(filename.c_str()));
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SkASSERT(comparisonPath.endsWith(filename.c_str()));
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};
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SkString fFilename;
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SkString fBasePath;
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SkString fComparisonPath;
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SkBitmap fBaseBitmap;
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SkBitmap fComparisonBitmap;
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SkBitmap fDifferenceBitmap;
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/// Arbitrary floating-point metric to be used to sort images from most
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/// to least different from baseline; values of 0 will be omitted from the
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/// summary webpage.
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float fFractionDifference;
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float fWeightedFraction;
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float fAverageMismatchR;
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float fAverageMismatchG;
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float fAverageMismatchB;
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uint32_t fMaxMismatchR;
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uint32_t fMaxMismatchG;
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uint32_t fMaxMismatchB;
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};
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#define MAX2(a,b) (((b) < (a)) ? (a) : (b))
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#define MAX3(a,b,c) (((b) < (a)) ? MAX2((a), (c)) : MAX2((b), (c)))
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struct DiffSummary {
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DiffSummary ()
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: fNumMatches (0)
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, fNumMismatches (0)
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, fMaxMismatchV (0)
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, fMaxMismatchPercent (0) { };
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uint32_t fNumMatches;
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uint32_t fNumMismatches;
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uint32_t fMaxMismatchV;
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float fMaxMismatchPercent;
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void print () {
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printf("%d of %d images matched.\n", fNumMatches,
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fNumMatches + fNumMismatches);
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if (fNumMismatches > 0) {
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printf("Maximum pixel intensity mismatch %d\n", fMaxMismatchV);
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printf("Largest area mismatch was %.2f%% of pixels\n",
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fMaxMismatchPercent);
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}
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}
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void add (DiffRecord* drp) {
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if (0 == drp->fFractionDifference) {
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fNumMatches++;
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} else {
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fNumMismatches++;
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if (drp->fFractionDifference * 100 > fMaxMismatchPercent) {
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fMaxMismatchPercent = drp->fFractionDifference * 100;
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}
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uint32_t value = MAX3(drp->fMaxMismatchR, drp->fMaxMismatchG,
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drp->fMaxMismatchB);
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if (value > fMaxMismatchV) {
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fMaxMismatchV = value;
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}
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}
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}
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};
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typedef SkTDArray<DiffRecord*> RecordArray;
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/// Comparison routine for qsort; sorts by fFractionDifference
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/// from largest to smallest.
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static int compare_diff_metrics (DiffRecord** lhs, DiffRecord** rhs) {
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if ((*lhs)->fFractionDifference < (*rhs)->fFractionDifference) {
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return 1;
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}
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if ((*rhs)->fFractionDifference < (*lhs)->fFractionDifference) {
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return -1;
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}
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return 0;
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}
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static int compare_diff_weighted (DiffRecord** lhs, DiffRecord** rhs) {
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if ((*lhs)->fWeightedFraction < (*rhs)->fWeightedFraction) {
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return 1;
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}
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if ((*lhs)->fWeightedFraction > (*rhs)->fWeightedFraction) {
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return -1;
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}
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return 0;
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}
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/// Comparison routine for qsort; sorts by max(fAverageMismatch{RGB})
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/// from largest to smallest.
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static int compare_diff_mean_mismatches (DiffRecord** lhs, DiffRecord** rhs) {
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float leftValue = MAX3((*lhs)->fAverageMismatchR,
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(*lhs)->fAverageMismatchG,
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(*lhs)->fAverageMismatchB);
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float rightValue = MAX3((*rhs)->fAverageMismatchR,
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(*rhs)->fAverageMismatchG,
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(*rhs)->fAverageMismatchB);
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if (leftValue < rightValue) {
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return 1;
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}
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if (rightValue < leftValue) {
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return -1;
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}
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return 0;
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}
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/// Comparison routine for qsort; sorts by max(fMaxMismatch{RGB})
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/// from largest to smallest.
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static int compare_diff_max_mismatches (DiffRecord** lhs, DiffRecord** rhs) {
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float leftValue = MAX3((*lhs)->fMaxMismatchR,
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(*lhs)->fMaxMismatchG,
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(*lhs)->fMaxMismatchB);
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float rightValue = MAX3((*rhs)->fMaxMismatchR,
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(*rhs)->fMaxMismatchG,
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(*rhs)->fMaxMismatchB);
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if (leftValue < rightValue) {
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return 1;
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}
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if (rightValue < leftValue) {
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return -1;
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}
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return compare_diff_mean_mismatches(lhs, rhs);
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}
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/// Parameterized routine to compute the color of a pixel in a difference image.
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typedef SkPMColor (*DiffMetricProc)(SkPMColor, SkPMColor);
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static bool get_bitmaps (DiffRecord* diffRecord) {
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SkFILEStream compareStream(diffRecord->fComparisonPath.c_str());
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if (!compareStream.isValid()) {
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SkDebugf("WARNING: couldn't open comparison file <%s>\n",
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diffRecord->fComparisonPath.c_str());
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return false;
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}
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SkFILEStream baseStream(diffRecord->fBasePath.c_str());
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if (!baseStream.isValid()) {
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SkDebugf("ERROR: couldn't open base file <%s>\n",
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diffRecord->fBasePath.c_str());
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return false;
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}
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SkImageDecoder* codec = SkImageDecoder::Factory(&baseStream);
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if (NULL == codec) {
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SkDebugf("ERROR: no codec found for <%s>\n",
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diffRecord->fBasePath.c_str());
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return false;
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}
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SkAutoTDelete<SkImageDecoder> ad(codec);
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baseStream.rewind();
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if (!codec->decode(&baseStream, &diffRecord->fBaseBitmap,
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SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode)) {
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SkDebugf("ERROR: codec failed for <%s>\n",
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diffRecord->fBasePath.c_str());
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return false;
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}
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if (!codec->decode(&compareStream, &diffRecord->fComparisonBitmap,
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SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode)) {
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SkDebugf("ERROR: codec failed for <%s>\n",
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diffRecord->fComparisonPath.c_str());
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return false;
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}
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return true;
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}
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// from gm - thanks to PNG, we need to force all pixels 100% opaque
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static void force_all_opaque(const SkBitmap& bitmap) {
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SkAutoLockPixels lock(bitmap);
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for (int y = 0; y < bitmap.height(); y++) {
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for (int x = 0; x < bitmap.width(); x++) {
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*bitmap.getAddr32(x, y) |= (SK_A32_MASK << SK_A32_SHIFT);
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}
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}
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}
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// from gm
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static bool write_bitmap(const SkString& path, const SkBitmap& bitmap) {
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SkBitmap copy;
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bitmap.copyTo(©, SkBitmap::kARGB_8888_Config);
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force_all_opaque(copy);
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return SkImageEncoder::EncodeFile(path.c_str(), copy,
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SkImageEncoder::kPNG_Type, 100);
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}
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// from gm
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static inline SkPMColor compute_diff_pmcolor(SkPMColor c0, SkPMColor c1) {
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int dr = SkGetPackedR32(c0) - SkGetPackedR32(c1);
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int dg = SkGetPackedG32(c0) - SkGetPackedG32(c1);
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int db = SkGetPackedB32(c0) - SkGetPackedB32(c1);
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return SkPackARGB32(0xFF, SkAbs32(dr), SkAbs32(dg), SkAbs32(db));
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}
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/// Returns white on every pixel so that differences jump out at you;
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/// makes it easy to spot areas of difference that are in the least-significant
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/// bits.
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static inline SkPMColor compute_diff_white(SkPMColor c0, SkPMColor c1) {
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return SkPackARGB32(0xFF, 0xFF, 0xFF, 0xFF);
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}
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static inline bool colors_match_thresholded(SkPMColor c0, SkPMColor c1,
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const int threshold) {
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int da = SkGetPackedA32(c0) - SkGetPackedA32(c1);
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int dr = SkGetPackedR32(c0) - SkGetPackedR32(c1);
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int dg = SkGetPackedG32(c0) - SkGetPackedG32(c1);
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int db = SkGetPackedB32(c0) - SkGetPackedB32(c1);
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return ((SkAbs32(da) <= threshold) &&
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(SkAbs32(dr) <= threshold) &&
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(SkAbs32(dg) <= threshold) &&
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(SkAbs32(db) <= threshold));
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}
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// based on gm
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static void compute_diff(DiffRecord* dr,
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DiffMetricProc diffFunction,
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const int colorThreshold) {
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SkAutoLockPixels alp(dr->fDifferenceBitmap);
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const int w = dr->fComparisonBitmap.width();
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const int h = dr->fComparisonBitmap.height();
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int mismatchedPixels = 0;
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int totalMismatchR = 0;
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int totalMismatchG = 0;
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int totalMismatchB = 0;
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// Accumulate fractionally different pixels, then divide out
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// # of pixels at the end.
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dr->fWeightedFraction = 0;
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for (int y = 0; y < h; y++) {
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for (int x = 0; x < w; x++) {
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SkPMColor c0 = *dr->fBaseBitmap.getAddr32(x, y);
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SkPMColor c1 = *dr->fComparisonBitmap.getAddr32(x, y);
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SkPMColor trueDifference = compute_diff_pmcolor(c0, c1);
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SkPMColor outputDifference = diffFunction(c0, c1);
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uint32_t thisR = SkGetPackedR32(trueDifference);
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uint32_t thisG = SkGetPackedG32(trueDifference);
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uint32_t thisB = SkGetPackedB32(trueDifference);
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totalMismatchR += thisR;
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totalMismatchG += thisG;
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totalMismatchB += thisB;
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// In HSV, value is defined as max RGB component.
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int value = MAX3(thisR, thisG, thisB);
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dr->fWeightedFraction += ((float) value) / 255;
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if (thisR > dr->fMaxMismatchR) {
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dr->fMaxMismatchR = thisR;
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}
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if (thisG > dr->fMaxMismatchG) {
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dr->fMaxMismatchG = thisG;
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}
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if (thisB > dr->fMaxMismatchB) {
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dr->fMaxMismatchB = thisB;
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}
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if (!colors_match_thresholded(c0, c1, colorThreshold)) {
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mismatchedPixels++;
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*dr->fDifferenceBitmap.getAddr32(x, y) = outputDifference;
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} else {
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*dr->fDifferenceBitmap.getAddr32(x, y) = 0;
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}
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}
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}
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int pixelCount = w * h;
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dr->fFractionDifference = ((float) mismatchedPixels) / pixelCount;
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dr->fWeightedFraction /= pixelCount;
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dr->fAverageMismatchR = ((float) totalMismatchR) / pixelCount;
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dr->fAverageMismatchG = ((float) totalMismatchG) / pixelCount;
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dr->fAverageMismatchB = ((float) totalMismatchB) / pixelCount;
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}
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/// Given a image filename, returns the name of the file containing the
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/// associated difference image.
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static SkString filename_to_diff_filename (const SkString& filename) {
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SkString diffName (filename);
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const char* cstring = diffName.c_str();
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int dotOffset = strrchr(cstring, '.') - cstring;
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diffName.remove(dotOffset, diffName.size() - dotOffset);
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diffName.append("-diff.png");
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return diffName;
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}
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static void create_diff_image(DiffRecord* drp,
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DiffMetricProc dmp,
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const int colorThreshold) {
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const int w = drp->fBaseBitmap.width();
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const int h = drp->fBaseBitmap.height();
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drp->fDifferenceBitmap.setConfig(SkBitmap::kARGB_8888_Config, w, h);
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drp->fDifferenceBitmap.allocPixels();
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compute_diff(drp, dmp, colorThreshold);
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}
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/// Creates difference images, returns the number that have a 0 metric.
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static void create_diff_images (DiffMetricProc dmp,
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SkQSortCompareProc scp,
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const int colorThreshold,
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RecordArray* differences,
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const SkString& baseDir,
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const SkString& comparisonDir,
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const SkString& outputDir,
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DiffSummary* summary) {
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//@todo thudson 19 Apr 2011
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// this lets us know about files in baseDir not in compareDir, but it
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// doesn't detect files in compareDir not in baseDir. Doing that
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// efficiently seems to imply iterating through both directories to
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// create a merged list, and then attempting to process every entry
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// in that list?
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SkOSFile::Iter baseIterator (baseDir.c_str());
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SkString filename;
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while (baseIterator.next(&filename)) {
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if (filename.endsWith(".pdf")) {
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continue;
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}
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SkString basePath (baseDir);
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SkString comparisonPath (comparisonDir);
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basePath.append(filename);
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comparisonPath.append(filename);
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DiffRecord * drp = new DiffRecord (filename, basePath, comparisonPath);
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if (!get_bitmaps(drp)) {
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continue;
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}
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create_diff_image(drp, dmp, colorThreshold);
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SkString outPath (outputDir);
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outPath.append(filename_to_diff_filename(filename));
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write_bitmap(outPath, drp->fDifferenceBitmap);
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differences->push(drp);
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summary->add(drp);
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}
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SkQSort(differences->begin(), differences->count(), sizeof(DiffRecord*),
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scp);
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}
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/// Make layout more consistent by scaling image to 240 height, 360 width,
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/// or natural size, whichever is smallest.
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static int compute_image_height (const SkBitmap& bmp) {
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int retval = 240;
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if (bmp.height() < retval) {
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retval = bmp.height();
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}
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float scale = (float) retval / bmp.height();
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if (bmp.width() * scale > 360) {
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scale = (float) 360 / bmp.width();
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retval = bmp.height() * scale;
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}
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return retval;
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}
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static void print_page_header (SkFILEWStream* stream,
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const int matchCount,
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const int colorThreshold,
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const RecordArray& differences) {
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SkTime::DateTime dt;
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SkTime::GetDateTime(&dt);
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stream->writeText("SkDiff run at ");
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stream->writeDecAsText(dt.fHour);
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stream->writeText(":");
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if (dt.fMinute < 10) {
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stream->writeText("0");
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}
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stream->writeDecAsText(dt.fMinute);
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stream->writeText(":");
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if (dt.fSecond < 10) {
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stream->writeText("0");
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}
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stream->writeDecAsText(dt.fSecond);
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stream->writeText("<br>");
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stream->writeDecAsText(matchCount);
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stream->writeText(" of ");
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stream->writeDecAsText(differences.count());
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stream->writeText(" images matched ");
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if (colorThreshold == 0) {
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stream->writeText("exactly");
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} else {
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stream->writeText("within ");
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stream->writeDecAsText(colorThreshold);
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stream->writeText(" color units per component");
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}
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stream->writeText(".<br>");
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}
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static void print_pixel_count (SkFILEWStream* stream,
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const DiffRecord& diff) {
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stream->writeText("<br>(");
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stream->writeDecAsText(diff.fFractionDifference *
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diff.fBaseBitmap.width() *
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diff.fBaseBitmap.height());
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stream->writeText(" pixels)");
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/*
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stream->writeDecAsText(diff.fWeightedFraction *
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diff.fBaseBitmap.width() *
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diff.fBaseBitmap.height());
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stream->writeText(" weighted pixels)");
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*/
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}
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static void print_label_cell (SkFILEWStream* stream,
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const DiffRecord& diff) {
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stream->writeText("<td>");
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stream->writeText(diff.fFilename.c_str());
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stream->writeText("<br>");
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char metricBuf [20];
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sprintf(metricBuf, "%12.4f%%", 100 * diff.fFractionDifference);
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stream->writeText(metricBuf);
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stream->writeText(" of pixels differ");
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stream->writeText("\n (");
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sprintf(metricBuf, "%12.4f%%", 100 * diff.fWeightedFraction);
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stream->writeText(metricBuf);
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stream->writeText(" weighted)");
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// Write the actual number of pixels that differ if it's < 1%
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if (diff.fFractionDifference < 0.01) {
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print_pixel_count(stream, diff);
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}
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stream->writeText("<br>Average color mismatch ");
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stream->writeDecAsText(MAX3(diff.fAverageMismatchR,
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diff.fAverageMismatchG,
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diff.fAverageMismatchB));
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stream->writeText("<br>Max color mismatch ");
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stream->writeDecAsText(MAX3(diff.fMaxMismatchR,
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diff.fMaxMismatchG,
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diff.fMaxMismatchB));
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stream->writeText("</td>");
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}
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static void print_image_cell (SkFILEWStream* stream,
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const SkString& path,
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int height) {
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stream->writeText("<td><a href=\"");
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stream->writeText(path.c_str());
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stream->writeText("\"><img src=\"");
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stream->writeText(path.c_str());
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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] == '/') {
|
|
relativePath.append("../");
|
|
}
|
|
}
|
|
|
|
outputStream.writeText("<html>\n<body>\n");
|
|
print_page_header(&outputStream, matchCount, colorThreshold, differences);
|
|
|
|
outputStream.writeText("<table>\n");
|
|
int i;
|
|
for (i = 0; i < differences.count(); i++) {
|
|
DiffRecord* diff = differences[i];
|
|
if (0 == diff->fFractionDifference) {
|
|
continue;
|
|
}
|
|
if (!diff->fBasePath.startsWith("/")) {
|
|
diff->fBasePath.prepend(relativePath);
|
|
}
|
|
if (!diff->fComparisonPath.startsWith("/")) {
|
|
diff->fComparisonPath.prepend(relativePath);
|
|
}
|
|
int height = compute_image_height(diff->fBaseBitmap);
|
|
outputStream.writeText("<tr>\n");
|
|
print_label_cell(&outputStream, *diff);
|
|
print_image_cell(&outputStream, diff->fBasePath, height);
|
|
print_image_cell(&outputStream,
|
|
filename_to_diff_filename(diff->fFilename), 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(
|
|
" -white: force all difference pixels to white\n"
|
|
" -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(" baseDir: directory to read baseline images from\n");
|
|
SkDebugf(" comparisonDir: directory to read comparison images from\n");
|
|
SkDebugf(
|
|
" outputDir: directory to write difference images to; defaults to\n"
|
|
" comparisonDir\n");
|
|
SkDebugf("Also creates an \"index.html\" file in the current 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;
|
|
|
|
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], "-white")) {
|
|
diffProc = compute_diff_white;
|
|
continue;
|
|
}
|
|
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], "-threshold")) {
|
|
colorThreshold = atoi(argv[++i]);
|
|
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 (j == 2) {
|
|
outputDir = comparisonDir;
|
|
} else if (j != 3) {
|
|
usage(argv[0]);
|
|
return 0;
|
|
}
|
|
|
|
if (!baseDir.endsWith("/")) {
|
|
baseDir.append("/");
|
|
}
|
|
if (!comparisonDir.endsWith("/")) {
|
|
comparisonDir.append("/");
|
|
}
|
|
if (!outputDir.endsWith("/")) {
|
|
outputDir.append("/");
|
|
}
|
|
|
|
create_diff_images(diffProc, sortProc, colorThreshold, &differences,
|
|
baseDir, comparisonDir, outputDir, &summary);
|
|
summary.print();
|
|
print_diff_page(summary.fNumMatches, colorThreshold, differences,
|
|
baseDir, comparisonDir, outputDir);
|
|
|
|
for (i = 0; i < differences.count(); i++) {
|
|
delete differences[i];
|
|
}
|
|
}
|