Add SkSpecialImage & SkSpecialSurface classes
Initial classes.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1579323002
Review URL: https://codereview.chromium.org/1579323002
diff --git a/tests/SpecialSurfaceTest.cpp b/tests/SpecialSurfaceTest.cpp
new file mode 100644
index 0000000..b1cbf68
--- /dev/null
+++ b/tests/SpecialSurfaceTest.cpp
@@ -0,0 +1,115 @@
+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file
+*/
+
+#include "SkCanvas.h"
+#include "SkSpecialImage.h"
+#include "SkSpecialSurface.h"
+#include "Test.h"
+
+#if SK_SUPPORT_GPU
+#include "GrContext.h"
+#include "SkGr.h"
+#endif
+
+class TestingSpecialSurfaceAccess {
+public:
+ static const SkIRect& Subset(const SkSpecialSurface* surf) {
+ return surf->subset();
+ }
+
+ static const SkIRect& Subset(const SkSpecialImage* img) {
+ return img->subset();
+ }
+};
+
+// Both 'kSmallerSize' and 'kFullSize' need to be a non-power-of-2 to exercise
+// the gpu's loose fit behavior
+static const int kSmallerSize = 10;
+static const int kPad = 5;
+static const int kFullSize = kSmallerSize + 2 * kPad;
+
+// Exercise the public API of SkSpecialSurface (e.g., getCanvas, newImageSnapshot)
+static void test_surface(SkSpecialSurface* surf, skiatest::Reporter* reporter, int offset) {
+
+ const SkIRect surfSubset = TestingSpecialSurfaceAccess::Subset(surf);
+ REPORTER_ASSERT(reporter, offset == surfSubset.fLeft);
+ REPORTER_ASSERT(reporter, offset == surfSubset.fTop);
+ REPORTER_ASSERT(reporter, kSmallerSize == surfSubset.width());
+ REPORTER_ASSERT(reporter, kSmallerSize == surfSubset.height());
+
+ SkCanvas* canvas = surf->getCanvas();
+ SkASSERT_RELEASE(canvas);
+
+ canvas->clear(SK_ColorRED);
+
+ SkAutoTUnref<SkSpecialImage> img(surf->newImageSnapshot());
+ REPORTER_ASSERT(reporter, img);
+
+ const SkIRect imgSubset = TestingSpecialSurfaceAccess::Subset(img);
+ REPORTER_ASSERT(reporter, surfSubset == imgSubset);
+
+ // the canvas was invalidated by the newImageSnapshot call
+ REPORTER_ASSERT(reporter, !surf->getCanvas());
+}
+
+DEF_TEST(SpecialSurface_Raster, reporter) {
+
+ SkImageInfo info = SkImageInfo::MakeN32(kSmallerSize, kSmallerSize, kOpaque_SkAlphaType);
+ SkAutoTUnref<SkSpecialSurface> surf(SkSpecialSurface::NewRaster(info));
+
+ test_surface(surf, reporter, 0);
+}
+
+DEF_TEST(SpecialSurface_Raster2, reporter) {
+
+ SkBitmap bm;
+ bm.allocN32Pixels(kFullSize, kFullSize, true);
+
+ const SkIRect subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
+
+ SkAutoTUnref<SkSpecialSurface> surf(SkSpecialSurface::NewFromBitmap(subset, bm));
+
+ test_surface(surf, reporter, kPad);
+
+ // TODO: check that the clear didn't escape the active region
+}
+
+#if SK_SUPPORT_GPU
+
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialSurface_Gpu1, reporter, context) {
+ GrSurfaceDesc desc;
+ desc.fConfig = kSkia8888_GrPixelConfig;
+ desc.fFlags = kRenderTarget_GrSurfaceFlag;
+ desc.fWidth = kSmallerSize;
+ desc.fHeight = kSmallerSize;
+
+ SkAutoTUnref<SkSpecialSurface> surf(SkSpecialSurface::NewRenderTarget(context, desc));
+
+ test_surface(surf, reporter, 0);
+}
+
+// test the more flexible factory
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialSurface_Gpu2, reporter, context) {
+ GrSurfaceDesc desc;
+ desc.fConfig = kSkia8888_GrPixelConfig;
+ desc.fFlags = kRenderTarget_GrSurfaceFlag;
+ desc.fWidth = kFullSize;
+ desc.fHeight = kFullSize;
+
+ SkAutoTUnref<GrTexture> temp(context->textureProvider()->createApproxTexture(desc));
+ SkASSERT_RELEASE(temp);
+
+ const SkIRect subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
+
+ SkAutoTUnref<SkSpecialSurface> surf(SkSpecialSurface::NewFromTexture(subset, temp));
+
+ test_surface(surf, reporter, kPad);
+
+ // TODO: check that the clear didn't escape the active region
+}
+
+#endif