Implement SkRecord::willPlaybackBitmaps, cache in SkPicture

tests/RecordTest.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 "SkBitmap.h"
+#include "SkImageInfo.h"
+#include "SkShader.h"
 #include "SkRecord.h"
+#include "SkRecordAnalysis.h"
 #include "SkRecords.h"
 
 // Sums the area of any DrawRect command it sees.
 class AreaSummer {
 public:
     AreaSummer() : fArea(0) {}
 
     template <typename T> void operator()(const T&) { }
 
     void operator()(const SkRecords::DrawRect& draw) {
@@ skipping 42 matching lines @@
     REPORTER_ASSERT(r, summer.area() == 100);
 
     // Scale 2x.
     Stretch stretch;
     stretch.apply(&record);
 
     // Now its area should be 100 + 400.
     summer.apply(record);
     REPORTER_ASSERT(r, summer.area() == 500);
 }
+
+DEF_TEST(RecordAnalysis, r) {
+    SkRecord record;
+
+    SkRect rect = SkRect::MakeWH(10, 10);
+    SkPaint paint;
+    SkNEW_PLACEMENT_ARGS(record.append<SkRecords::DrawRect>(), SkRecords::DrawRect, (paint, rect));

[mtklein, 2014/07/01 18:58:01]

I find a macro like this helps keep things straight:

#define APPEND(record, type, ...) SkNEW_PLACEMENT_ARGS(record.append<type>(),
type, (__VA_ARGS__))

YMMV.

[tomhudson, 2014/07/02 15:25:41]

MMV - feels like a break-even in this instance.
Done.

+    REPORTER_ASSERT(r, !SkRecordWillPlaybackBitmaps(record));
+
+    SkBitmap bitmap;
+    SkNEW_PLACEMENT_ARGS(record.append<SkRecords::DrawBitmap>(), SkRecords::DrawBitmap,
+                         (&paint, bitmap, 0.0f, 0.0f));
+    REPORTER_ASSERT(r, SkRecordWillPlaybackBitmaps(record));
+
+    SkNEW_PLACEMENT_ARGS(record.replace<SkRecords::DrawRect>(1),
+                         SkRecords::DrawRect, (paint, rect));
+    REPORTER_ASSERT(r, !SkRecordWillPlaybackBitmaps(record));
+
+    SkPaint paint2;
+    // CreateBitmapShader is too smart for us; an empty (or 1x1) bitmap shader
+    // gets optimized into a non-bitmap form, so we create a 2x2 bitmap here.
+    SkBitmap bitmap2;
+    bitmap2.allocPixels(SkImageInfo::MakeN32Premul(2, 2));
+    bitmap2.eraseColor(SK_ColorBLUE);
+    *(bitmap2.getAddr32(0, 0)) = SK_ColorGREEN;
+    SkShader* shader = SkShader::CreateBitmapShader(bitmap2, SkShader::kClamp_TileMode,
+                                                    SkShader::kClamp_TileMode);
+    paint2.setShader(shader);
+    REPORTER_ASSERT(r, shader->asABitmap(NULL, NULL, NULL) == SkShader::kDefault_BitmapType);
+    SkNEW_PLACEMENT_ARGS(record.append<SkRecords::DrawRect>(),
+                         SkRecords::DrawRect, (paint2, rect));
+    REPORTER_ASSERT(r, SkRecordWillPlaybackBitmaps(record));
+}
+