Resurrect pathfinder in viewer and rename to "bisect"
Bug: skia:
Change-Id: If8d2f46b8f27fefc3a0f983eb649654e0fb4afcb
Reviewed-on: https://skia-review.googlesource.com/108685
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/tools/viewer/BisectSlide.cpp b/tools/viewer/BisectSlide.cpp
new file mode 100644
index 0000000..63e69d2
--- /dev/null
+++ b/tools/viewer/BisectSlide.cpp
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "BisectSlide.h"
+
+#include "SkDOM.h"
+#include "SkOSPath.h"
+#include "SkPicture.h"
+#include "SkStream.h"
+#include "../experimental/svg/model/SkSVGDOM.h"
+
+sk_sp<BisectSlide> BisectSlide::Create(const char filepath[]) {
+ SkFILEStream stream(filepath);
+ if (!stream.isValid()) {
+ SkDebugf("BISECT: invalid input file at \"%s\"\n", filepath);
+ return nullptr;
+ }
+
+ sk_sp<BisectSlide> bisect(new BisectSlide(filepath));
+ if (bisect->fFilePath.endsWith(".svg")) {
+ SkDOM xml;
+ if (!xml.build(stream)) {
+ SkDebugf("BISECT: XML parsing failed: \"%s\"\n", filepath);
+ return nullptr;
+ }
+ sk_sp<SkSVGDOM> svg = SkSVGDOM::MakeFromDOM(xml);
+ if (!svg) {
+ SkDebugf("BISECT: couldn't load svg at \"%s\"\n", filepath);
+ return nullptr;
+ }
+ svg->setContainerSize(SkSize::Make(bisect->getDimensions()));
+ svg->render(bisect.get());
+ } else {
+ sk_sp<SkPicture> skp = SkPicture::MakeFromStream(&stream);
+ if (!skp) {
+ SkDebugf("BISECT: couldn't load skp at \"%s\"\n", filepath);
+ return nullptr;
+ }
+ skp->playback(bisect.get());
+ }
+
+ return bisect;
+}
+
+BisectSlide::BisectSlide(const char filepath[])
+ : SkCanvas(4096, 4096, nullptr)
+ , fFilePath(filepath) {
+ const char* basename = strrchr(fFilePath.c_str(), SkOSPath::SEPARATOR);
+ fName.printf("BISECT_%s", basename ? basename + 1 : fFilePath.c_str());
+}
+
+// Called through SkPicture::playback only during creation.
+void BisectSlide::onDrawPath(const SkPath& path, const SkPaint& paint) {
+ SkRect bounds;
+ SkIRect ibounds;
+ this->getTotalMatrix().mapRect(&bounds, path.getBounds());
+ bounds.roundOut(&ibounds);
+ fDrawBounds.join(ibounds);
+ fFoundPaths.push_back() = {path, paint, this->getTotalMatrix()};
+}
+
+bool BisectSlide::onChar(SkUnichar c) {
+ switch (c) {
+ case 'X':
+ if (!fTossedPaths.empty()) {
+ SkTSwap(fFoundPaths, fTossedPaths);
+ if ('X' == fTrail.back()) {
+ fTrail.pop_back();
+ } else {
+ fTrail.push_back('X');
+ }
+ }
+ return true;
+
+ case 'x':
+ if (fFoundPaths.count() > 1) {
+ int midpt = (fFoundPaths.count() + 1) / 2;
+ fPathHistory.emplace(fFoundPaths, fTossedPaths);
+ fTossedPaths.reset(fFoundPaths.begin() + midpt, fFoundPaths.count() - midpt);
+ fFoundPaths.resize_back(midpt);
+ fTrail.push_back('x');
+ }
+ return true;
+
+ case 'Z': {
+ if (!fPathHistory.empty()) {
+ fFoundPaths = fPathHistory.top().first;
+ fTossedPaths = fPathHistory.top().second;
+ fPathHistory.pop();
+ char ch;
+ do {
+ ch = fTrail.back();
+ fTrail.pop_back();
+ } while (ch != 'x');
+ }
+ return true;
+ }
+
+ case 'D':
+ SkDebugf("viewer --bisect %s", fFilePath.c_str());
+ if (!fTrail.empty()) {
+ SkDebugf(" ");
+ for (char ch : fTrail) {
+ SkDebugf("%c", ch);
+ }
+ }
+ SkDebugf("\n");
+ for (const FoundPath& foundPath : fFoundPaths) {
+ foundPath.fPath.dump();
+ }
+ return true;
+ }
+
+ return false;
+}
+
+void BisectSlide::draw(SkCanvas* canvas) {
+ SkAutoCanvasRestore acr(canvas, true);
+ canvas->translate(-fDrawBounds.left(), -fDrawBounds.top());
+
+ for (const FoundPath& path : fFoundPaths) {
+ SkAutoCanvasRestore acr(canvas, true);
+ canvas->concat(path.fViewMatrix);
+ canvas->drawPath(path.fPath, path.fPaint);
+ }
+}