add pathops tight bounds; conform path ops' gyp to unit tests

tests/PathOpsTightBoundsTest.cpp

+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "PathOpsExtendedTest.h"
+#include "PathOpsThreadedCommon.h"
+#include "SkCanvas.h"
+#include "SkRandom.h"
+#include "SkTArray.h"
+#include "SkTSort.h"
+#include "Test.h"
+
+static void testTightBoundsLines(PathOpsThreadState* data) {
+    SkRandom ran;
+    for (int index = 0; index < 1000; ++index) {
+        SkPath path;
+        int contourCount = ran.nextRangeU(1, 10);
+        for (int cIndex = 0; cIndex < contourCount; ++cIndex) {
+            int lineCount = ran.nextRangeU(1, 10);
+            path.moveTo(ran.nextRangeF(-1000, 1000), ran.nextRangeF(-1000, 1000));
+            for (int lIndex = 0; lIndex < lineCount; ++lIndex) {
+                path.lineTo(ran.nextRangeF(-1000, 1000), ran.nextRangeF(-1000, 1000));
+            }
+            if (ran.nextBool()) {
+                path.close();
+            }
+        }
+        SkRect classicBounds = path.getBounds();
+        SkRect tightBounds;
+        REPORTER_ASSERT(data->fReporter, TightBounds(path, &tightBounds));
+        REPORTER_ASSERT(data->fReporter, classicBounds == tightBounds);
+    }
+}
+
+DEF_TEST(PathOpsTightBoundsLines, reporter) {
+    int threadCount = initializeTests(reporter, "tightBoundsLines");
+    PathOpsThreadedTestRunner testRunner(reporter, threadCount);
+    int outerCount = reporter->allowExtendedTest() ? 100 : 1;
+    for (int index = 0; index < outerCount; ++index) {
+        for (int idx2 = 0; idx2 < 10; ++idx2) {
+            *testRunner.fRunnables.append() = SkNEW_ARGS(PathOpsThreadedRunnable,
+                    (&testTightBoundsLines, 0, 0, 0, 0, &testRunner));
+        }
+    }
+    testRunner.render();
+}
+
+static void testTightBoundsQuads(PathOpsThreadState* data) {
+    SkRandom ran;
+    const int bitWidth = 32;
+    const int bitHeight = 32;
+    const float pathMin = 1;
+    const float pathMax = (float) (bitHeight - 2);
+    SkBitmap& bits = *data->fBitmap;
+    if (bits.width() == 0) {
+        bits.allocN32Pixels(bitWidth, bitHeight);
+    }
+    SkCanvas canvas(bits);
+    SkPaint paint;
+    for (int index = 0; index < 100; ++index) {
+        SkPath path;
+        int contourCount = ran.nextRangeU(1, 10);
+        for (int cIndex = 0; cIndex < contourCount; ++cIndex) {
+            int lineCount = ran.nextRangeU(1, 10);
+            path.moveTo(ran.nextRangeF(1, pathMax), ran.nextRangeF(pathMin, pathMax));
+            for (int lIndex = 0; lIndex < lineCount; ++lIndex) {
+                if (ran.nextBool()) {
+                    path.lineTo(ran.nextRangeF(pathMin, pathMax), ran.nextRangeF(pathMin, pathMax));
+                } else {
+                    path.quadTo(ran.nextRangeF(pathMin, pathMax), ran.nextRangeF(pathMin, pathMax),
+                            ran.nextRangeF(pathMin, pathMax), ran.nextRangeF(pathMin, pathMax));
+                }
+            }
+            if (ran.nextBool()) {
+                path.close();
+            }
+        }
+        SkRect classicBounds = path.getBounds();
+        SkRect tightBounds;
+        REPORTER_ASSERT(data->fReporter, TightBounds(path, &tightBounds));
+        REPORTER_ASSERT(data->fReporter, classicBounds.contains(tightBounds));
+        canvas.drawColor(SK_ColorWHITE);
+        canvas.drawPath(path, paint);
+        SkIRect bitsWritten = {31, 31, 0, 0};
+        for (int y = 0; y < bitHeight; ++y) {
+            uint32_t* addr1 = data->fBitmap->getAddr32(0, y);
+            bool lineWritten = false;
+            for (int x = 0; x < bitWidth; ++x) {
+                if (addr1[x] == (uint32_t) -1) {
+                    continue;
+                }
+                lineWritten = true;
+                bitsWritten.fLeft = SkTMin(bitsWritten.fLeft, x);
+                bitsWritten.fRight = SkTMax(bitsWritten.fRight, x);
+            }
+            if (!lineWritten) {
+                continue;
+            }
+            bitsWritten.fTop = SkTMin(bitsWritten.fTop, y);
+            bitsWritten.fBottom = SkTMax(bitsWritten.fBottom, y);
+        }
+        if (!bitsWritten.isEmpty()) {
+            SkIRect tightOut;
+            tightBounds.roundOut(&tightOut);
+            REPORTER_ASSERT(data->fReporter, tightOut.contains(bitsWritten));
+        }
+    }
+}
+
+DEF_TEST(PathOpsTightBoundsQuads, reporter) {
+    int threadCount = initializeTests(reporter, "tightBoundsQuads");
+    PathOpsThreadedTestRunner testRunner(reporter, threadCount);
+    int outerCount = reporter->allowExtendedTest() ? 100 : 1;
+    for (int index = 0; index < outerCount; ++index) {
+        for (int idx2 = 0; idx2 < 10; ++idx2) {
+            *testRunner.fRunnables.append() = SkNEW_ARGS(PathOpsThreadedRunnable,
+                    (&testTightBoundsQuads, 0, 0, 0, 0, &testRunner));
+        }
+    }
+    testRunner.render();
+}