use pixmaps for dst in sprites -- NO BITMAPS

tests/BitmapTest.cpp

Index: tests/BitmapTest.cpp
diff --git a/tests/BitmapTest.cpp b/tests/BitmapTest.cpp
index f3d8faa967c7ae99c311e63cf4e3d5f73cc260de..256725666781bea5797e5adbc9800b8e504312a7 100644
--- a/tests/BitmapTest.cpp
+++ b/tests/BitmapTest.cpp
@@ -9,6 +9,31 @@
 #include "SkMallocPixelRef.h"
 #include "Test.h"
 
+static void test_peekpixels(skiatest::Reporter* reporter) {
+    const SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
+
+    SkPixmap pmap;
+    SkBitmap bm;
+
+    // empty should return false
+    REPORTER_ASSERT(reporter, !bm.peekPixels(NULL));
+    REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));
+
+    // no pixels should return false
+    bm.setInfo(SkImageInfo::MakeN32Premul(10, 10));
+    REPORTER_ASSERT(reporter, !bm.peekPixels(NULL));
+    REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));
+
+    // real pixels should return true
+    bm.allocPixels(info);
+    REPORTER_ASSERT(reporter, bm.peekPixels(NULL));
+    REPORTER_ASSERT(reporter, bm.peekPixels(&pmap));
+    REPORTER_ASSERT(reporter, pmap.info() == bm.info());
+    REPORTER_ASSERT(reporter, pmap.addr() == bm.getPixels());
+    REPORTER_ASSERT(reporter, pmap.rowBytes() == bm.rowBytes());
+    REPORTER_ASSERT(reporter, pmap.ctable() == bm.getColorTable());
+}
+
 // https://code.google.com/p/chromium/issues/detail?id=446164
 static void test_bigalloc(skiatest::Reporter* reporter) {
     const int width = 0x40000001;
@@ -95,4 +120,5 @@ DEF_TEST(Bitmap, reporter) {
     test_bigwidth(reporter);
     test_allocpixels(reporter);
     test_bigalloc(reporter);
+    test_peekpixels(reporter);
 }