Added stack to AA clip mask cache
http://codereview.appspot.com/6201058/
git-svn-id: http://skia.googlecode.com/svn/trunk@3885 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/ClipCacheTest.cpp b/tests/ClipCacheTest.cpp
new file mode 100644
index 0000000..dbcb4e2
--- /dev/null
+++ b/tests/ClipCacheTest.cpp
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2012 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 "SkGpuDevice.h"
+#include "../../src/gpu/GrClipMaskManager.h"
+
+static const int X_SIZE = 12;
+static const int Y_SIZE = 12;
+
+////////////////////////////////////////////////////////////////////////////////
+static GrTexture* createTexture(GrContext* context) {
+ unsigned char textureData[X_SIZE][Y_SIZE];
+
+ memset(textureData, 0, X_SIZE * Y_SIZE);
+
+ GrTextureDesc desc;
+
+ // let Skia know we will be using this texture as a render target
+ desc.fFlags = kRenderTarget_GrTextureFlagBit;
+ // it is a single channel texture
+ desc.fConfig = kAlpha_8_GrPixelConfig;
+ desc.fWidth = X_SIZE;
+ desc.fHeight = Y_SIZE;
+ desc.fSampleCnt = 0;
+
+ // We are initializing the texture with zeros here
+ GrTexture* texture = context->createUncachedTexture(desc, textureData, 0);
+ if (!texture) {
+ return NULL;
+ }
+
+ return texture;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// verify that the top state of the stack matches the passed in state
+static void check_state(skiatest::Reporter* reporter,
+ const GrClipMaskCache& cache,
+ int width,
+ int height,
+ const GrClip& clip,
+ GrTexture* mask,
+ const GrRect& bound) {
+ REPORTER_ASSERT(reporter, width == cache.getLastWidth());
+ REPORTER_ASSERT(reporter, height == cache.getLastHeight());
+
+ GrClip cacheClip;
+ cache.getLastClip(&cacheClip);
+ REPORTER_ASSERT(reporter, clip == cacheClip);
+
+ REPORTER_ASSERT(reporter, mask == cache.getLastMask());
+
+ GrRect cacheBound;
+ cache.getLastBound(&cacheBound);
+ REPORTER_ASSERT(reporter, bound == cacheBound);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// basic test of the cache's base functionality:
+// push, pop, set, canReuse & getters
+static void test_cache(skiatest::Reporter* reporter, GrContext* context) {
+
+ GrClipMaskCache cache;
+
+ GrClip emptyClip;
+ emptyClip.setEmpty();
+
+ GrRect emptyBound;
+ emptyBound.setEmpty();
+
+ // check initial state
+ check_state(reporter, cache, -1, -1, emptyClip, NULL, emptyBound);
+
+ // set the current state
+ GrRect bound1;
+ bound1.set(0, 0, 100, 100);
+
+ GrClip clip1;
+ clip1.setFromRect(bound1);
+
+ SkAutoTUnref<GrTexture> texture(createTexture(context));
+
+ cache.set(clip1, 128, 128, texture.get(), bound1);
+
+ // check that the set took
+ check_state(reporter, cache, 128, 128, clip1, texture.get(), bound1);
+ REPORTER_ASSERT(reporter, 2 == texture.get()->getRefCnt());
+
+ // push the state
+ cache.push();
+
+ // verify that the pushed state is initially empty
+ check_state(reporter, cache, -1, -1, emptyClip, NULL, emptyBound);
+ REPORTER_ASSERT(reporter, 2 == texture.get()->getRefCnt());
+
+ // modify the new state
+ GrRect bound2;
+ bound2.set(-10, -10, 10, 10);
+
+ GrClip clip2;
+ clip2.setEmpty();
+ clip2.setFromRect(bound2);
+
+ cache.set(clip2, 10, 10, texture.get(), bound2);
+
+ // check that the changes took
+ check_state(reporter, cache, 10, 10, clip2, texture.get(), bound2);
+ REPORTER_ASSERT(reporter, 3 == texture.get()->getRefCnt());
+
+ // check to make sure canReuse works
+ REPORTER_ASSERT(reporter, cache.canReuse(clip2, 10, 10));
+ REPORTER_ASSERT(reporter, !cache.canReuse(clip1, 10, 10));
+
+ // pop the state
+ cache.pop();
+
+ // verify that the old state is restored
+ check_state(reporter, cache, 128, 128, clip1, texture.get(), bound1);
+ REPORTER_ASSERT(reporter, 2 == texture.get()->getRefCnt());
+
+ // manually clear the state
+ cache.reset();
+
+ // verify it is now empty
+ check_state(reporter, cache, -1, -1, emptyClip, NULL, emptyBound);
+ REPORTER_ASSERT(reporter, 1 == texture.get()->getRefCnt());
+
+ // pop again - so there is no state
+ cache.pop();
+
+#if !defined(SK_DEBUG)
+ // verify that the getters don't crash
+ // only do in release since it generates asserts in debug
+ check_state(reporter, cache, -1, -1, emptyClip, NULL, emptyBound);
+#endif
+ REPORTER_ASSERT(reporter, 1 == texture.get()->getRefCnt());
+}
+
+////////////////////////////////////////////////////////////////////////////////
+static void TestClipCache(skiatest::Reporter* reporter, GrContext* context) {
+
+ test_cache(reporter, context);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+#include "TestClassDef.h"
+DEFINE_GPUTESTCLASS("ClipCache", ClipCacheTestClass, TestClipCache)