// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/390223051): Remove C-library calls to fix the errors.
#pragma allow_unsafe_libc_calls
#endif

#include "cc/test/skia_common.h"

#include <stddef.h>

#include <cstdint>
#include <string>
#include <utility>
#include <vector>

#include "base/base_paths.h"
#include "base/check.h"
#include "base/containers/heap_array.h"
#include "base/containers/span.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/strings/string_number_conversions.h"
#include "cc/paint/display_item_list.h"
#include "cc/paint/draw_image.h"
#include "cc/paint/paint_canvas.h"
#include "cc/paint/paint_image_builder.h"
#include "cc/paint/skottie_wrapper.h"
#include "cc/test/fake_paint_image_generator.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColorSpace.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkImageGenerator.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/core/SkPixmap.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkYUVAPixmaps.h"
#include "third_party/skia/include/gpu/ganesh/GrDirectContext.h"
#include "third_party/skia/include/gpu/ganesh/SkImageGanesh.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/skia_conversions.h"

namespace cc {
namespace {
constexpr char kSkottieJSON[] =
    "{"
    "  \"v\" : \"4.12.0\","
    "  \"fr\": 30,"
    "  \"w\" : $WIDTH,"
    "  \"h\" : $HEIGHT,"
    "  \"ip\": 0,"
    "  \"op\": $DURATION,"
    "  \"assets\": [],"

    "  \"layers\": ["
    "    {"
    "      \"ty\": 1,"
    "      \"sw\": $WIDTH,"
    "      \"sh\": $HEIGHT,"
    "      \"sc\": \"#00ff00\","
    "      \"ip\": 0,"
    "      \"op\": $DURATION"
    "    }"
    "  ]"
    "}";

constexpr char kSkottieWidthToken[] = "$WIDTH";
constexpr char kSkottieHeightToken[] = "$HEIGHT";
constexpr char kSkottieDurationToken[] = "$DURATION";
constexpr int kFps = 30;
}  // namespace

void DrawDisplayList(unsigned char* buffer,
                     const gfx::Rect& layer_rect,
                     scoped_refptr<const DisplayItemList> list) {
  SkImageInfo info =
      SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
  SkBitmap bitmap;
  bitmap.installPixels(info, buffer, info.minRowBytes());
  SkCanvas canvas(bitmap, SkSurfaceProps{});
  canvas.clipRect(gfx::RectToSkRect(layer_rect));
  list->Raster(&canvas);
}

bool AreDisplayListDrawingResultsSame(const gfx::Rect& layer_rect,
                                      const DisplayItemList* list_a,
                                      const DisplayItemList* list_b) {
  const size_t pixel_size = 4 * layer_rect.size().GetArea();

  auto pixels_a = base::HeapArray<unsigned char>::Uninit(pixel_size);
  auto pixels_b = base::HeapArray<unsigned char>::Uninit(pixel_size);
  memset(pixels_a.data(), 0, pixel_size);
  memset(pixels_b.data(), 0, pixel_size);
  DrawDisplayList(pixels_a.data(), layer_rect, list_a);
  DrawDisplayList(pixels_b.data(), layer_rect, list_b);

  return !memcmp(pixels_a.data(), pixels_b.data(), pixel_size);
}

Region ImageRectsToRegion(const DiscardableImageMap::Rects& rects) {
  Region region;
  for (const auto& r : rects) {
    region.Union(r);
  }
  return region;
}

sk_sp<PaintImageGenerator> CreatePaintImageGenerator(const gfx::Size& size) {
  return sk_make_sp<FakePaintImageGenerator>(
      SkImageInfo::MakeN32Premul(size.width(), size.height()));
}

PaintImage CreatePaintWorkletPaintImage(
    scoped_refptr<PaintWorkletInput> input) {
  auto paint_image = PaintImageBuilder::WithDefault()
                         .set_id(1)
                         .set_deferred_paint_record(std::move(input))
                         .TakePaintImage();
  return paint_image;
}

SkYUVAPixmapInfo GetYUVAPixmapInfo(const gfx::Size& image_size,
                                   YUVSubsampling format,
                                   SkYUVAPixmapInfo::DataType yuv_data_type,
                                   bool has_alpha) {
  // TODO(skbug.com/10632): Update this when we have planar configs with alpha.
  if (has_alpha) {
    NOTREACHED();
  }
  SkYUVAInfo::Subsampling subsampling;
  switch (format) {
    case YUVSubsampling::k410:
      subsampling = SkYUVAInfo::Subsampling::k410;
      break;
    case YUVSubsampling::k411:
      subsampling = SkYUVAInfo::Subsampling::k411;
      break;
    case YUVSubsampling::k420:
      subsampling = SkYUVAInfo::Subsampling::k420;
      break;
    case YUVSubsampling::k422:
      subsampling = SkYUVAInfo::Subsampling::k422;
      break;
    case YUVSubsampling::k440:
      subsampling = SkYUVAInfo::Subsampling::k440;
      break;
    case YUVSubsampling::k444:
      subsampling = SkYUVAInfo::Subsampling::k444;
      break;
    default:
      NOTREACHED();
  }
  SkYUVAInfo yuva_info({image_size.width(), image_size.height()},
                       SkYUVAInfo::PlaneConfig::kY_U_V, subsampling,
                       kJPEG_Full_SkYUVColorSpace);
  return SkYUVAPixmapInfo(yuva_info, yuv_data_type, /*row bytes*/ nullptr);
}

PaintImage CreateDiscardablePaintImage(
    const gfx::Size& size,
    sk_sp<SkColorSpace> color_space,
    bool allocate_encoded_data,
    PaintImage::Id id,
    SkColorType color_type,
    std::optional<YUVSubsampling> yuv_format,
    SkYUVAPixmapInfo::DataType yuv_data_type) {
  if (!color_space)
    color_space = SkColorSpace::MakeSRGB();
  if (id == PaintImage::kInvalidId)
    id = PaintImage::GetNextId();

  SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), color_type,
                                       kPremul_SkAlphaType, color_space);
  sk_sp<FakePaintImageGenerator> generator;
  if (yuv_format) {
    SkYUVAPixmapInfo yuva_pixmap_info =
        GetYUVAPixmapInfo(size, *yuv_format, yuv_data_type);
    generator = sk_make_sp<FakePaintImageGenerator>(
        info, yuva_pixmap_info, std::vector<FrameMetadata>{FrameMetadata()},
        allocate_encoded_data);
  } else {
    generator = sk_make_sp<FakePaintImageGenerator>(
        info, std::vector<FrameMetadata>{FrameMetadata()},
        allocate_encoded_data);
  }
  auto paint_image =
      PaintImageBuilder::WithDefault()
          .set_id(id)
          .set_paint_image_generator(generator)
          // For simplicity, assume that any paint image created for testing is
          // unspecified decode mode as would be the case with most img tags on
          // the web.
          .set_decoding_mode(PaintImage::DecodingMode::kUnspecified)
          .TakePaintImage();
  return paint_image;
}

DrawImage CreateDiscardableDrawImage(const gfx::Size& size,
                                     sk_sp<SkColorSpace> color_space,
                                     SkRect rect,
                                     PaintFlags::FilterQuality filter_quality,
                                     const SkM44& matrix) {
  SkIRect irect;
  rect.roundOut(&irect);

  return DrawImage(CreateDiscardablePaintImage(size, color_space), false, irect,
                   filter_quality, matrix);
}

PaintImage CreateAnimatedImage(const gfx::Size& size,
                               std::vector<FrameMetadata> frames,
                               int repetition_count,
                               PaintImage::Id id) {
  return PaintImageBuilder::WithDefault()
      .set_id(id)
      .set_paint_image_generator(sk_make_sp<FakePaintImageGenerator>(
          SkImageInfo::MakeN32Premul(size.width(), size.height()),
          std::move(frames)))
      .set_animation_type(PaintImage::AnimationType::kAnimated)
      .set_repetition_count(repetition_count)
      .TakePaintImage();
}

PaintImage CreateBitmapImage(const gfx::Size& size, SkColorType color_type) {
  SkBitmap bitmap;
  auto info = SkImageInfo::Make(size.width(), size.height(), color_type,
                                kPremul_SkAlphaType, nullptr /* color_space */);
  bitmap.allocPixels(info);
  bitmap.eraseColor(SK_AlphaTRANSPARENT);
  return PaintImageBuilder::WithDefault()
      .set_id(PaintImage::GetNextId())
      .set_image(SkImages::RasterFromBitmap(bitmap),
                 PaintImage::GetNextContentId())
      .TakePaintImage();
}

scoped_refptr<SkottieWrapper> CreateSkottie(const gfx::Size& size,
                                            int duration_secs) {
  std::string json(kSkottieJSON);

  for (size_t pos = json.find(kSkottieWidthToken); pos != std::string::npos;
       pos = json.find(kSkottieWidthToken)) {
    json.replace(pos, strlen(kSkottieWidthToken),
                 base::NumberToString(size.width()));
  }

  for (size_t pos = json.find(kSkottieHeightToken); pos != std::string::npos;
       pos = json.find(kSkottieHeightToken)) {
    json.replace(pos, strlen(kSkottieHeightToken),
                 base::NumberToString(size.height()));
  }

  for (size_t pos = json.find(kSkottieDurationToken); pos != std::string::npos;
       pos = json.find(kSkottieDurationToken)) {
    json.replace(pos, strlen(kSkottieDurationToken),
                 base::NumberToString(duration_secs * kFps));
  }

  return CreateSkottieFromString(json);
}

scoped_refptr<SkottieWrapper> CreateSkottieFromString(std::string_view json) {
  base::span<const uint8_t> json_span = base::as_byte_span(json);
  return SkottieWrapper::UnsafeCreateSerializable(
      std::vector<uint8_t>(json_span.begin(), json_span.end()));
}

std::string LoadSkottieFileFromTestData(
    base::FilePath::StringViewType animation_file_name) {
  base::FilePath animation_path;
  CHECK(base::PathService::Get(base::DIR_SRC_TEST_DATA_ROOT, &animation_path));
  animation_path = animation_path.AppendASCII("cc/test/data/lottie")
                       .Append(base::FilePath(animation_file_name));
  std::string animation_json;
  CHECK(base::ReadFileToString(animation_path, &animation_json))
      << animation_path;
  return animation_json;
}

scoped_refptr<SkottieWrapper> CreateSkottieFromTestDataDir(
    base::FilePath::StringViewType animation_file_name) {
  return CreateSkottieFromString(
      LoadSkottieFileFromTestData(animation_file_name));
}

PaintImage CreateNonDiscardablePaintImage(const gfx::Size& size) {
  auto context = GrDirectContext::MakeMock(nullptr);
  SkBitmap bitmap;
  auto info = SkImageInfo::Make(size.width(), size.height(), kN32_SkColorType,
                                kPremul_SkAlphaType, nullptr /* color_space */);
  bitmap.allocPixels(info);
  bitmap.eraseColor(SK_AlphaTRANSPARENT);
  return PaintImageBuilder::WithDefault()
      .set_id(PaintImage::GetNextId())
      .set_texture_image(SkImages::TextureFromImage(
                             context.get(), SkImages::RasterFromBitmap(bitmap)),
                         PaintImage::GetNextContentId())
      .TakePaintImage();
}

}  // namespace cc