Add testing for Rectanizer-derived classes

tests/GpuRectanizerTest.cpp

+/*
+* Copyright 2014 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#if SK_SUPPORT_GPU
+
+#include "GrRectanizer_pow2.h"
+#include "GrRectanizer_skyline.h"
+#include "SkRandom.h"
+#include "SkSize.h"
+#include "SkTDArray.h"
+#include "Test.h"
+
+static const int kWidth = 1000;
+static const int kHeight = 1000;
+
+// Basic test of a GrRectanizer-derived class' functionality
+static void test_rectanizer_basic(skiatest::Reporter* reporter, GrRectanizer* rectanizer) {
+    REPORTER_ASSERT(reporter, kWidth == rectanizer->width());
+    REPORTER_ASSERT(reporter, kHeight == rectanizer->height());
+
+    GrIPoint16 loc;
+
+    REPORTER_ASSERT(reporter, rectanizer->addRect(50, 50, &loc));
+    REPORTER_ASSERT(reporter, rectanizer->percentFull() > 0.0f);
+    rectanizer->reset();
+    REPORTER_ASSERT(reporter, rectanizer->percentFull() == 0.0f);
+}
+
+static void test_rectanizer_inserts(skiatest::Reporter*,
+                                    GrRectanizer* rectanizer,
+                                    const SkTDArray<SkISize>& rects) {
+    int i;
+    for (i = 0; i < rects.count(); ++i) {
+        GrIPoint16 loc;
+        if (!rectanizer->addRect(rects[i].fWidth, rects[i].fHeight, &loc)) {
+            break;
+        }
+    }
+
+    //SkDebugf("\n***%d %f\n", i, rectanizer->percentFull());
+}
+
+static void test_skyline(skiatest::Reporter* reporter, const SkTDArray<SkISize>& rects) {
+    GrRectanizerSkyline skylineRectanizer(kWidth, kHeight);
+
+    test_rectanizer_basic(reporter, &skylineRectanizer);
+    test_rectanizer_inserts(reporter, &skylineRectanizer, rects);
+}
+
+static void test_pow2(skiatest::Reporter* reporter, const SkTDArray<SkISize>& rects) {
+    GrRectanizerPow2 pow2Rectanizer(kWidth, kHeight);
+
+    test_rectanizer_basic(reporter, &pow2Rectanizer);
+    test_rectanizer_inserts(reporter, &pow2Rectanizer, rects);
+}
+
+DEF_GPUTEST(GpuRectanizer, reporter, factory) {
+    SkTDArray<SkISize> fRects;
+    SkRandom rand;
+
+    for (int i = 0; i < 50; i++) {
+        fRects.push(SkISize::Make(rand.nextRangeU(1, kWidth / 2),
+                                  rand.nextRangeU(1, kHeight / 2)));
+    }
+
+    test_skyline(reporter, fRects);
+    test_pow2(reporter, fRects);
+}
+
+#endif