Add support for row-by-row jpeg encoding
Reland of:
https://skia-review.googlesource.com/c/14641/
Bug: 713862
Change-Id: I9dca5ede4ebf569c5f80edcfb23a506b6cfa935e
Reviewed-on: https://skia-review.googlesource.com/15144
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
diff --git a/tests/EncodeTest.cpp b/tests/EncodeTest.cpp
new file mode 100644
index 0000000..9db5039
--- /dev/null
+++ b/tests/EncodeTest.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Resources.h"
+#include "Test.h"
+
+#include "SkBitmap.h"
+#include "SkJpegEncoder.h"
+#include "SkStream.h"
+
+DEF_TEST(Encode_Jpeg, r) {
+ SkBitmap bitmap;
+ bool success = GetResourceAsBitmap("mandrill_128.png", &bitmap);
+ if (!success) {
+ return;
+ }
+
+ SkPixmap src;
+ success = bitmap.peekPixels(&src);
+ REPORTER_ASSERT(r, success);
+ if (!success) {
+ return;
+ }
+
+ SkDynamicMemoryWStream dst0, dst1, dst2, dst3;
+ success = SkJpegEncoder::Encode(&dst0, src, SkJpegEncoder::Options());
+ REPORTER_ASSERT(r, success);
+
+ auto encoder1 = SkJpegEncoder::Make(&dst1, src, SkJpegEncoder::Options());
+ for (int i = 0; i < src.height(); i++) {
+ success = encoder1->encodeRows(1);
+ REPORTER_ASSERT(r, success);
+ }
+
+ auto encoder2 = SkJpegEncoder::Make(&dst2, src, SkJpegEncoder::Options());
+ for (int i = 0; i < src.height(); i+=3) {
+ success = encoder2->encodeRows(3);
+ REPORTER_ASSERT(r, success);
+ }
+
+ auto encoder3 = SkJpegEncoder::Make(&dst3, src, SkJpegEncoder::Options());
+ success = encoder3->encodeRows(200);
+ REPORTER_ASSERT(r, success);
+
+ sk_sp<SkData> data0 = dst0.detachAsData();
+ sk_sp<SkData> data1 = dst1.detachAsData();
+ sk_sp<SkData> data2 = dst2.detachAsData();
+ sk_sp<SkData> data3 = dst3.detachAsData();
+ REPORTER_ASSERT(r, data0->equals(data1.get()));
+ REPORTER_ASSERT(r, data0->equals(data2.get()));
+ REPORTER_ASSERT(r, data0->equals(data3.get()));
+}