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- /*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/codec/SkCodec.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkData.h"
- #include "include/core/SkImageEncoder.h"
- #include "include/core/SkStream.h"
- #include "include/core/SkTypes.h"
- #include "tools/ToolUtils.h"
- #include "tools/skdiff/skdiff.h"
- #include "tools/skdiff/skdiff_utils.h"
- #include <memory>
- bool are_buffers_equal(SkData* skdata1, SkData* skdata2) {
- if ((nullptr == skdata1) || (nullptr == skdata2)) {
- return false;
- }
- if (skdata1->size() != skdata2->size()) {
- return false;
- }
- return (0 == memcmp(skdata1->data(), skdata2->data(), skdata1->size()));
- }
- sk_sp<SkData> read_file(const char* file_path) {
- sk_sp<SkData> data(SkData::MakeFromFileName(file_path));
- if (!data) {
- SkDebugf("WARNING: could not open file <%s> for reading\n", file_path);
- }
- return data;
- }
- bool get_bitmap(sk_sp<SkData> fileBits, DiffResource& resource, bool sizeOnly,
- bool ignoreColorSpace) {
- auto codec = SkCodec::MakeFromData(fileBits);
- if (!codec) {
- SkDebugf("ERROR: could not create codec for <%s>\n", resource.fFullPath.c_str());
- resource.fStatus = DiffResource::kCouldNotDecode_Status;
- return false;
- }
- // If we're "ignoring" color space, then we want the raw pixel values from each image, so we
- // decode to the original color space. If we want to account for color spaces, then we want to
- // decode each image to the same color space, so that colors that are the "same" (but encoded
- // differently) are transformed to some canonical representation prior to comparison.
- //
- // TODO: Use something wider than sRGB to avoid clipping with out-of-gamut colors.
- SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
- if (!ignoreColorSpace) {
- info = info.makeColorSpace(SkColorSpace::MakeSRGB());
- }
- if (!resource.fBitmap.setInfo(info.makeColorType(kN32_SkColorType))) {
- SkDebugf("ERROR: could not set bitmap info for <%s>\n", resource.fFullPath.c_str());
- resource.fStatus = DiffResource::kCouldNotDecode_Status;
- return false;
- }
- if (sizeOnly) {
- return true;
- }
- if (!resource.fBitmap.tryAllocPixels()) {
- SkDebugf("ERROR: could not allocate pixels for <%s>\n", resource.fFullPath.c_str());
- resource.fStatus = DiffResource::kCouldNotDecode_Status;
- return false;
- }
- if (SkCodec::kSuccess != codec->getPixels(resource.fBitmap.info(),
- resource.fBitmap.getPixels(), resource.fBitmap.rowBytes())) {
- SkDebugf("ERROR: codec failed for basePath <%s>\n", resource.fFullPath.c_str());
- resource.fStatus = DiffResource::kCouldNotDecode_Status;
- return false;
- }
- resource.fStatus = DiffResource::kDecoded_Status;
- return true;
- }
- /** Thanks to PNG, we need to force all pixels 100% opaque. */
- static void force_all_opaque(const SkBitmap& 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);
- }
- }
- }
- bool write_bitmap(const SkString& path, const SkBitmap& bitmap) {
- SkBitmap copy;
- ToolUtils::copy_to(©, kN32_SkColorType, bitmap);
- force_all_opaque(copy);
- return ToolUtils::EncodeImageToFile(path.c_str(), copy, SkEncodedImageFormat::kPNG, 100);
- }
- /// Return a copy of the "input" string, within which we have replaced all instances
- /// of oldSubstring with newSubstring.
- ///
- /// TODO: If we like this, we should move it into the core SkString implementation,
- /// adding more checks and ample test cases, and paying more attention to efficiency.
- static SkString replace_all(const SkString &input,
- const char oldSubstring[], const char newSubstring[]) {
- SkString output;
- const char *input_cstr = input.c_str();
- const char *first_char = input_cstr;
- const char *match_char;
- size_t oldSubstringLen = strlen(oldSubstring);
- while ((match_char = strstr(first_char, oldSubstring))) {
- output.append(first_char, (match_char - first_char));
- output.append(newSubstring);
- first_char = match_char + oldSubstringLen;
- }
- output.append(first_char);
- return output;
- }
- static SkString filename_to_derived_filename(const SkString& filename, const char *suffix) {
- SkString diffName (filename);
- const char* cstring = diffName.c_str();
- size_t dotOffset = strrchr(cstring, '.') - cstring;
- diffName.remove(dotOffset, diffName.size() - dotOffset);
- diffName.append(suffix);
- // In case we recursed into subdirectories, replace slashes with something else
- // so the diffs will all be written into a single flat directory.
- diffName = replace_all(diffName, PATH_DIV_STR, "_");
- return diffName;
- }
- SkString filename_to_diff_filename(const SkString& filename) {
- return filename_to_derived_filename(filename, "-diff.png");
- }
- SkString filename_to_white_filename(const SkString& filename) {
- return filename_to_derived_filename(filename, "-white.png");
- }
- void create_and_write_diff_image(DiffRecord* drp,
- DiffMetricProc dmp,
- const int colorThreshold,
- const SkString& outputDir,
- const SkString& filename) {
- const int w = drp->fBase.fBitmap.width();
- const int h = drp->fBase.fBitmap.height();
- if (w != drp->fComparison.fBitmap.width() || h != drp->fComparison.fBitmap.height()) {
- drp->fResult = DiffRecord::kDifferentSizes_Result;
- } else {
- drp->fDifference.fBitmap.allocN32Pixels(w, h);
- drp->fWhite.fBitmap.allocN32Pixels(w, h);
- SkASSERT(DiffRecord::kUnknown_Result == drp->fResult);
- compute_diff(drp, dmp, colorThreshold);
- SkASSERT(DiffRecord::kUnknown_Result != drp->fResult);
- }
- if (outputDir.isEmpty()) {
- drp->fDifference.fStatus = DiffResource::kUnspecified_Status;
- drp->fWhite.fStatus = DiffResource::kUnspecified_Status;
- } else {
- drp->fDifference.fFilename = filename_to_diff_filename(filename);
- drp->fDifference.fFullPath = outputDir;
- drp->fDifference.fFullPath.append(drp->fDifference.fFilename);
- drp->fDifference.fStatus = DiffResource::kSpecified_Status;
- drp->fWhite.fFilename = filename_to_white_filename(filename);
- drp->fWhite.fFullPath = outputDir;
- drp->fWhite.fFullPath.append(drp->fWhite.fFilename);
- drp->fWhite.fStatus = DiffResource::kSpecified_Status;
- if (DiffRecord::kDifferentPixels_Result == drp->fResult) {
- if (write_bitmap(drp->fDifference.fFullPath, drp->fDifference.fBitmap)) {
- drp->fDifference.fStatus = DiffResource::kExists_Status;
- } else {
- drp->fDifference.fStatus = DiffResource::kDoesNotExist_Status;
- }
- if (write_bitmap(drp->fWhite.fFullPath, drp->fWhite.fBitmap)) {
- drp->fWhite.fStatus = DiffResource::kExists_Status;
- } else {
- drp->fWhite.fStatus = DiffResource::kDoesNotExist_Status;
- }
- }
- }
- }
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