Merge "Add some basic DA unit tests" into mnc-dev

LOCAL_SRC_FILES += \

    unit_tests/ClipAreaTests.cpp \

    unit_tests/DamageAccumulatorTests.cpp \

    unit_tests/LinearAllocatorTests.cpp \

    unit_tests/main.cpp

/*

 * Copyright (C) 2015 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <gtest/gtest.h>

#include <DamageAccumulator.h>

#include <Matrix.h>

#include <utils/LinearAllocator.h>

#include <SkRect.h>

using namespace android;

using namespace android::uirenderer;

// Test that push & pop are propegating the dirty rect

// There is no transformation of the dirty rect, the input is the same

// as the output.

TEST(DamageAccumulator, identity) {

    DamageAccumulator da;

    Matrix4 identity;

    SkRect curDirty;

    identity.loadIdentity();

    da.pushTransform(&identity);

    da.dirty(50, 50, 100, 100);

    da.pushTransform(&identity);

    da.peekAtDirty(&curDirty);

    ASSERT_EQ(SkRect(), curDirty);

    da.popTransform();

    da.peekAtDirty(&curDirty);

    ASSERT_EQ(SkRect::MakeLTRB(50, 50, 100, 100), curDirty);

    da.popTransform();

    da.finish(&curDirty);

    ASSERT_EQ(SkRect::MakeLTRB(50, 50, 100, 100), curDirty);

}

// Test that transformation is happening at the correct levels via

// peekAtDirty & popTransform. Just uses a simple translate to test this

TEST(DamageAccumulator, translate) {

    DamageAccumulator da;

    Matrix4 translate;

    SkRect curDirty;

    translate.loadTranslate(25, 25, 0);

    da.pushTransform(&translate);

    da.dirty(50, 50, 100, 100);

    da.peekAtDirty(&curDirty);

    ASSERT_EQ(SkRect::MakeLTRB(50, 50, 100, 100), curDirty);

    da.popTransform();

    da.finish(&curDirty);

    ASSERT_EQ(SkRect::MakeLTRB(75, 75, 125, 125), curDirty);

}

// Test that dirty rectangles are being unioned across "siblings

TEST(DamageAccumulator, union) {

    DamageAccumulator da;

    Matrix4 identity;

    SkRect curDirty;

    identity.loadIdentity();

    da.pushTransform(&identity);

    da.pushTransform(&identity);

    da.dirty(50, 50, 100, 100);

    da.popTransform();

    da.pushTransform(&identity);

    da.dirty(150, 50, 200, 125);

    da.popTransform();

    da.popTransform();

    da.finish(&curDirty);

    ASSERT_EQ(SkRect::MakeLTRB(50, 50, 200, 125), curDirty);

}