skia_conversions_unittests.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "display_list/dl_blend_mode.h"
#include "display_list/dl_color.h"
#include "display_list/dl_tile_mode.h"
#include "flutter/testing/testing.h"
#include "impeller/core/formats.h"
#include "impeller/display_list/skia_conversions.h"
#include "impeller/geometry/color.h"
#include "impeller/geometry/scalar.h"
 
namespace impeller {
namespace testing {
 
TEST(SkiaConversionTest, ToSamplerDescriptor) {
  EXPECT_EQ(skia_conversions::ToSamplerDescriptor(
                flutter::DlImageSampling::kNearestNeighbor)
                .min_filter,
            impeller::MinMagFilter::kNearest);
  EXPECT_EQ(skia_conversions::ToSamplerDescriptor(
                flutter::DlImageSampling::kNearestNeighbor)
                .mip_filter,
            impeller::MipFilter::kBase);
 
  EXPECT_EQ(
      skia_conversions::ToSamplerDescriptor(flutter::DlImageSampling::kLinear)
          .min_filter,
      impeller::MinMagFilter::kLinear);
  EXPECT_EQ(
      skia_conversions::ToSamplerDescriptor(flutter::DlImageSampling::kLinear)
          .mip_filter,
      impeller::MipFilter::kBase);
 
  EXPECT_EQ(skia_conversions::ToSamplerDescriptor(
                flutter::DlImageSampling::kMipmapLinear)
                .min_filter,
            impeller::MinMagFilter::kLinear);
  EXPECT_EQ(skia_conversions::ToSamplerDescriptor(
                flutter::DlImageSampling::kMipmapLinear)
                .mip_filter,
            impeller::MipFilter::kLinear);
}
 
TEST(SkiaConversionsTest, ToColor) {
  // Create a color with alpha, red, green, and blue values that are all
  // trivially divisible by 255 so that we can test the conversion results in
  // correct scalar values.
  //                                                AARRGGBB
  const flutter::DlColor color = flutter::DlColor(0x8040C020);
  auto converted_color = skia_conversions::ToColor(color);
 
  ASSERT_TRUE(ScalarNearlyEqual(converted_color.alpha, 0x80 * (1.0f / 255)));
  ASSERT_TRUE(ScalarNearlyEqual(converted_color.red, 0x40 * (1.0f / 255)));
  ASSERT_TRUE(ScalarNearlyEqual(converted_color.green, 0xC0 * (1.0f / 255)));
  ASSERT_TRUE(ScalarNearlyEqual(converted_color.blue, 0x20 * (1.0f / 255)));
}
 
}  // namespace testing
}  // namespace impeller