add SkCanvas::NewRaster factory -- a very common use-case in chrome
BUG=skia:
R=scroggo@google.com
Author: reed@google.com
Review URL: https://codereview.chromium.org/183533004
git-svn-id: http://skia.googlecode.com/svn/trunk@13617 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/CanvasTest.cpp b/tests/CanvasTest.cpp
index 5f3d79c..18c683d 100644
--- a/tests/CanvasTest.cpp
+++ b/tests/CanvasTest.cpp
@@ -1,4 +1,3 @@
-
/*
* Copyright 2012 Google Inc.
*
@@ -893,6 +892,45 @@
}
}
+static void test_newraster(skiatest::Reporter* reporter) {
+ SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
+ SkCanvas* canvas = SkCanvas::NewRaster(info);
+ REPORTER_ASSERT(reporter, canvas);
+
+ SkImageInfo info2;
+ size_t rowBytes;
+ const SkPMColor* addr = (const SkPMColor*)canvas->peekPixels(&info2, &rowBytes);
+ REPORTER_ASSERT(reporter, addr);
+ REPORTER_ASSERT(reporter, info == info2);
+ for (int y = 0; y < info.height(); ++y) {
+ for (int x = 0; x < info.width(); ++x) {
+ REPORTER_ASSERT(reporter, 0 == addr[x]);
+ }
+ addr = (const SkPMColor*)((const char*)addr + rowBytes);
+ }
+ SkDELETE(canvas);
+
+ // now try a deliberately bad info
+ info.fWidth = -1;
+ REPORTER_ASSERT(reporter, NULL == SkCanvas::NewRaster(info));
+
+ // too big
+ info.fWidth = 1 << 30;
+ info.fHeight = 1 << 30;
+ REPORTER_ASSERT(reporter, NULL == SkCanvas::NewRaster(info));
+
+ // not a valid pixel type
+ info.fWidth = info.fHeight = 10;
+ info.fColorType = kUnknown_SkColorType;
+ REPORTER_ASSERT(reporter, NULL == SkCanvas::NewRaster(info));
+
+ // We should succeed with a zero-sized valid info
+ info = SkImageInfo::MakeN32Premul(0, 0);
+ canvas = SkCanvas::NewRaster(info);
+ REPORTER_ASSERT(reporter, canvas);
+ SkDELETE(canvas);
+}
+
DEF_TEST(Canvas, reporter) {
// Init global here because bitmap pixels cannot be alocated during
// static initialization
@@ -909,4 +947,6 @@
// Explicitly call reset(), so we don't leak the pixels (since kTestBitmap is a global)
kTestBitmap.reset();
+
+ test_newraster(reporter);
}