Backfill unit tests for SkRecord

tests/RecordDrawTest.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.
  */
 
 #include "Test.h"
 
 #include "SkDebugCanvas.h"
 #include "SkRecord.h"
 #include "SkRecordOpts.h"
 #include "SkRecordDraw.h"
 #include "SkRecorder.h"
 #include "SkRecords.h"
 
 static const int W = 1920, H = 1080;
 
+static void draw_pos_text_h(SkCanvas* canvas, const char* text, SkScalar y) {
+    const size_t len = strlen(text);
+    SkAutoTMalloc<SkScalar> xpos(len);
+    for (size_t i = 0; i < len; i++) {
+        xpos[i] = (SkScalar)i;
+    }
+    canvas->drawPosTextH(text, len, xpos, y, SkPaint());
+}
+
+// Rerecord into another SkRecord using full SkCanvas semantics,
+// tracking clips and allowing SkRecordDraw's quickReject() calls to work.
+static void record_clipped(const SkRecord& record, SkRect clip, SkRecord* clipped) {
+    SkRecorder recorder(SkRecorder::kReadWrite_Mode, clipped, W, H);
+    recorder.clipRect(clip);
+    SkRecordDraw(record, &recorder);
+}
+
+DEF_TEST(RecordDraw_PosTextHQuickReject, r) {
+    SkRecord record;
+    SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
+
+    draw_pos_text_h(&recorder, "This will draw.", 20);
+    draw_pos_text_h(&recorder, "This won't.", 5000);
+
+    SkRecordBoundDrawPosTextH(&record);
+
+    SkRecord clipped;
+    record_clipped(record, SkRect::MakeLTRB(20, 20, 200, 200), &clipped);
+
+    // clipRect and the first drawPosTextH.
+    REPORTER_ASSERT(r, 2 == clipped.count());
+}
+
 DEF_TEST(RecordDraw_Culling, r) {
     // Record these 7 drawing commands verbatim.
     SkRecord record;
     SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
 
     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();
 
     // Take a pass over to match up pushCulls and popCulls.
     SkRecordAnnotateCullingPairs(&record);
 
-    // Rerecord into another SkRecord using full SkCanvas semantics,
-    // tracking clips and allowing SkRecordDraw's quickReject() calls to work.
-    SkRecord rerecord;
-    SkRecorder rerecorder(SkRecorder::kReadWrite_Mode, &rerecord, W, H);
     // This clip intersects the outer cull, but allows us to quick reject the inner one.
-    rerecorder.clipRect(SkRect::MakeLTRB(20, 20, 200, 200));
-
-    SkRecordDraw(record, &rerecorder);
+    SkRecord clipped;
+    record_clipped(record, SkRect::MakeLTRB(20, 20, 200, 200), &clipped);
 
     // We'll keep the clipRect call from above, and the outer two drawRects, and the push/pop pair.
     // If culling weren't working, we'd see 8 commands recorded here.
-    REPORTER_ASSERT(r, 5 == rerecord.count());
+    REPORTER_ASSERT(r, 5 == clipped.count());
 }