Backfill unit tests for SkRecord
BUG=skia:2378
R=fmalita@chromium.org, mtklein@google.com
Author: mtklein@chromium.org
Review URL: https://codereview.chromium.org/251133008
git-svn-id: http://skia.googlecode.com/svn/trunk@14455 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/RecordOptsTest.cpp b/tests/RecordOptsTest.cpp
new file mode 100644
index 0000000..140ad7e
--- /dev/null
+++ b/tests/RecordOptsTest.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Test.h"
+
+#include "SkRecord.h"
+#include "SkRecordOpts.h"
+#include "SkRecorder.h"
+#include "SkRecords.h"
+
+static const int W = 1920, H = 1080;
+
+// If the command we're reading is a U, set ptr to it, otherwise set it to NULL.
+template <typename U>
+struct ReadAs {
+ explicit ReadAs(const U** ptr) : ptr(ptr) {}
+ const U** ptr;
+
+ void operator()(const U& r) { *ptr = &r; }
+
+ template <typename T>
+ void operator()(const T&) { *ptr = NULL; }
+};
+
+// Assert that the ith command in record is of type T, and return it.
+template <typename T>
+static const T* assert_type(const SkRecord& record, unsigned index) {
+ const T* ptr = NULL;
+ ReadAs<T> reader(&ptr);
+ record.visit(index, reader);
+ SkASSERT(ptr != NULL);
+ return ptr;
+}
+
+DEF_TEST(RecordOpts_Culling, r) {
+ SkRecord record;
+ SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
+
+ recorder.drawRect(SkRect::MakeWH(1000, 10000), SkPaint());
+
+ recorder.pushCull(SkRect::MakeWH(100, 100));
+ recorder.drawRect(SkRect::MakeWH(10, 10), SkPaint());
+ recorder.drawRect(SkRect::MakeWH(30, 30), SkPaint());
+ recorder.pushCull(SkRect::MakeWH(5, 5));
+ recorder.drawRect(SkRect::MakeWH(1, 1), SkPaint());
+ recorder.popCull();
+ recorder.popCull();
+
+ SkRecordAnnotateCullingPairs(&record);
+
+ REPORTER_ASSERT(r, 6 == assert_type<SkRecords::PairedPushCull>(record, 1)->skip);
+ REPORTER_ASSERT(r, 2 == assert_type<SkRecords::PairedPushCull>(record, 4)->skip);
+}
+
+static void draw_pos_text(SkCanvas* canvas, const char* text, bool constantY) {
+ const size_t len = strlen(text);
+ SkAutoTMalloc<SkPoint> pos(len);
+ for (size_t i = 0; i < len; i++) {
+ pos[i].fX = (SkScalar)i;
+ pos[i].fY = constantY ? SK_Scalar1 : (SkScalar)i;
+ }
+ canvas->drawPosText(text, len, pos, SkPaint());
+}
+
+DEF_TEST(RecordOpts_StrengthReduction, r) {
+ SkRecord record;
+ SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
+
+ // We can convert a drawPosText into a drawPosTextH when all the Ys are the same.
+ draw_pos_text(&recorder, "This will be reduced to drawPosTextH.", true);
+ draw_pos_text(&recorder, "This cannot be reduced to drawPosTextH.", false);
+
+ SkRecordReduceDrawPosTextStrength(&record);
+
+ assert_type<SkRecords::DrawPosTextH>(record, 0);
+ assert_type<SkRecords::DrawPosText>(record, 1);
+}
+
+DEF_TEST(RecordOpts_TextBounding, r) {
+ SkRecord record;
+ SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
+
+ // First, get a drawPosTextH. Here's a handy way. Its text size will be the default (12).
+ draw_pos_text(&recorder, "This will be reduced to drawPosTextH.", true);
+ SkRecordReduceDrawPosTextStrength(&record);
+
+ const SkRecords::DrawPosTextH* original =
+ assert_type<SkRecords::DrawPosTextH>(record, 0);
+
+ // This should wrap the original DrawPosTextH with minY and maxY.
+ SkRecordBoundDrawPosTextH(&record);
+
+ const SkRecords::BoundedDrawPosTextH* bounded =
+ assert_type<SkRecords::BoundedDrawPosTextH>(record, 0);
+
+ const SkPaint defaults;
+ REPORTER_ASSERT(r, bounded->base == original);
+ REPORTER_ASSERT(r, bounded->minY <= SK_Scalar1 - defaults.getTextSize());
+ REPORTER_ASSERT(r, bounded->maxY >= SK_Scalar1 + defaults.getTextSize());
+}
+
+DEF_TEST(RecordOpts_NoopSaveRestores, r) {
+ SkRecord record;
+ SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
+
+ // The second pass will clean up this pair after the first pass noops all the innards.
+ recorder.save();
+ // A simple pointless pair of save/restore.
+ recorder.save();
+ recorder.restore();
+
+ // As long as we don't draw in there, everything is a noop.
+ recorder.save();
+ recorder.clipRect(SkRect::MakeWH(200, 200));
+ recorder.clipRect(SkRect::MakeWH(100, 100));
+ recorder.restore();
+ recorder.restore();
+
+ // These will be kept (though some future optimization might noop the save and restore).
+ recorder.save();
+ recorder.drawRect(SkRect::MakeWH(200, 200), SkPaint());
+ recorder.restore();
+
+ SkRecordNoopSaveRestores(&record);
+
+ for (unsigned index = 0; index < 8; index++) {
+ assert_type<SkRecords::NoOp>(record, index);
+ }
+ assert_type<SkRecords::Save>(record, 8);
+ assert_type<SkRecords::DrawRect>(record, 9);
+ assert_type<SkRecords::Restore>(record, 10);
+}