/*
 * 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 "tests/common/TestUtils.h"

#include <gtest/gtest.h>
#include <SkBlurDrawLooper.h>
#include <SkColorMatrixFilter.h>
#include <SkColorSpace.h>
#include <SkImagePriv.h>
#include <SkPathOps.h>
#include <SkShader.h>

using namespace android;
using namespace android::uirenderer;

SkBitmap createSkBitmap(int width, int height) {
    SkBitmap bitmap;
    SkImageInfo info = SkImageInfo::Make(width, height, kN32_SkColorType, kPremul_SkAlphaType);
    bitmap.setInfo(info);
    bitmap.allocPixels(info);
    return bitmap;
}

/**
 * 1x1 bitmaps must not be optimized into solid color shaders, since HWUI can't
 * compose/render color shaders
 */
TEST(SkiaBehavior, CreateBitmapShader1x1) {
    SkBitmap origBitmap = createSkBitmap(1, 1);
    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(origBitmap, kNever_SkCopyPixelsMode);
    sk_sp<SkShader> s = image->makeShader(
            SkShader::kClamp_TileMode,
            SkShader::kRepeat_TileMode,
            nullptr);

    SkBitmap bitmap;
    SkShader::TileMode xy[2];
    ASSERT_TRUE(s->isABitmap(&bitmap, nullptr, xy))
        << "1x1 bitmap shader must query as bitmap shader";
    EXPECT_EQ(origBitmap.pixelRef(), bitmap.pixelRef());
}

TEST(SkiaBehavior, genIds) {
    SkBitmap bitmap = createSkBitmap(100, 100);
    uint32_t genId = bitmap.getGenerationID();
    bitmap.notifyPixelsChanged();
    EXPECT_NE(genId, bitmap.getGenerationID());
}

TEST(SkiaBehavior, lightingColorFilter_simplify) {
    {
        sk_sp<SkColorFilter> filter(
                SkColorMatrixFilter::MakeLightingFilter(0x11223344, 0));

        SkColor observedColor;
        SkBlendMode observedMode;
        ASSERT_TRUE(filter->asColorMode(&observedColor, &observedMode));
        EXPECT_EQ(0xFF223344, observedColor);
        EXPECT_EQ(SkBlendMode::kModulate, observedMode);
    }

    {
        sk_sp<SkColorFilter> failFilter(
                SkColorMatrixFilter::MakeLightingFilter(0x11223344, 0x1));
        EXPECT_FALSE(failFilter->asColorMode(nullptr, nullptr));
    }
}

TEST(SkiaBehavior, porterDuffCreateIsCached) {
    SkPaint paint;
    paint.setBlendMode(SkBlendMode::kOverlay);
    auto expected = paint.getBlendMode();
    paint.setBlendMode(SkBlendMode::kClear);
    ASSERT_NE(expected, paint.getBlendMode());
    paint.setBlendMode(SkBlendMode::kOverlay);
    ASSERT_EQ(expected, paint.getBlendMode());
}

TEST(SkiaBehavior, pathIntersection) {
    SkPath p0, p1, result;
    p0.addRect(SkRect::MakeXYWH(-5.0f, 0.0f, 1080.0f, 242.0f));
    p1.addRect(SkRect::MakeXYWH(0.0f, 0.0f, 1080.0f, 242.0f));
    Op(p0, p1, kIntersect_SkPathOp, &result);
    SkRect resultRect;
    ASSERT_TRUE(result.isRect(&resultRect));
    ASSERT_EQ(SkRect::MakeXYWH(0.0f, 0.0f, 1075.0f, 242.0f), resultRect);
}

TEST(SkiaBehavior, srgbColorSpaceIsSingleton) {
    sk_sp<SkColorSpace> sRGB1 = SkColorSpace::MakeSRGB();
    sk_sp<SkColorSpace> sRGB2 = SkColorSpace::MakeSRGB();
    ASSERT_EQ(sRGB1.get(), sRGB2.get());
}

TEST(SkiaBehavior, blurDrawLooper) {
    sk_sp<SkDrawLooper> looper = SkBlurDrawLooper::Make(SK_ColorRED, 5.0f, 3.0f, 4.0f);

    SkDrawLooper::BlurShadowRec blur;
    bool success = looper->asABlurShadow(&blur);
    ASSERT_TRUE(success);

    ASSERT_EQ(SK_ColorRED, blur.fColor);
    ASSERT_EQ(5.0f, blur.fSigma);
    ASSERT_EQ(3.0f, blur.fOffset.fX);
    ASSERT_EQ(4.0f, blur.fOffset.fY);
}