1 files changed, 152 insertions, 0 deletions
diff --git a/tests/ClipCacheTest.cpp b/tests/ClipCacheTest.cpp
new file mode 100644
index 0000000000..dbcb4e2994
--- /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)