# Copyright (c) 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/features.gni")
import("//build/config/ui.gni")
import("//testing/test.gni")
import("//third_party/skia/gn/shared_sources.gni")

if (current_cpu == "arm") {
  import("//build/config/arm.gni")
}
if (current_cpu == "mipsel" || current_cpu == "mips64el") {
  import("//build/config/mips.gni")
}

skia_support_gpu = !is_ios
skia_support_pdf = !is_ios && (enable_basic_printing || enable_print_preview)

# When building Chrome for iOS with GYP, the target cpu is not known during
# the invocation of gyp. This cause the iOS build to use non-optimised skia.
# Replicate this with GN to avoid introducing regression as recommended by
# the OWNERS of skia.

declare_args() {
  skia_whitelist_serialized_typefaces = false

  # TODO(crbug.com/607933): Once GYP is no longer supported, port iOS to use
  # optimised skia.
  skia_build_no_opts = is_ios
}

# External-facing config for dependent code.
config("skia_config") {
  include_dirs = [
    "config",
    "ext",
    "//third_party/skia/include/c",
    "//third_party/skia/include/config",
    "//third_party/skia/include/core",
    "//third_party/skia/include/effects",
    "//third_party/skia/include/images",
    "//third_party/skia/include/lazy",
    "//third_party/skia/include/pathops",
    "//third_party/skia/include/pdf",
    "//third_party/skia/include/pipe",
    "//third_party/skia/include/ports",
    "//third_party/skia/include/utils",
  ]

  defines = [ "SK_IGNORE_DW_GRAY_FIX" ]
  defines += skia_for_chromium_defines

  defines += []

  if (skia_build_no_opts) {
    defines += [ "SK_BUILD_NO_OPTS" ]
  }

  if (is_component_build) {
    defines += [
      "SKIA_DLL",
      "GR_GL_IGNORE_ES3_MSAA=0",
    ]
  }

  if (skia_support_gpu) {
    include_dirs += [
      "//third_party/skia/include/gpu",
      "//third_party/skia/src/gpu",
    ]
    defines += [ "SK_SUPPORT_GPU=1" ]
  } else {
    defines += [ "SK_SUPPORT_GPU=0" ]
  }

  if (is_android) {
    defines += [
      "SK_BUILD_FOR_ANDROID",
      "USE_CHROMIUM_SKIA",
    ]
  }

  if (is_mac) {
    defines += [ "SK_BUILD_FOR_MAC" ]
  }

  if (is_win) {
    defines += [ "GR_GL_FUNCTION_TYPE=__stdcall" ]
  }

  if (skia_whitelist_serialized_typefaces) {
    defines += [ "SK_WHITELIST_SERIALIZED_TYPEFACES" ]
  }
}

# Internal-facing config for Skia library code.
config("skia_library_config") {
  # These include directories are only included for Skia code and are not
  # exported to dependents. It's not clear if this is on purpose, but this
  # matches the GYP build.
  include_dirs = [
    "//third_party/skia/include/private",
    "//third_party/skia/include/client/android",
    "//third_party/skia/src/core",
    "//third_party/skia/src/image",
    "//third_party/skia/src/opts",
    "//third_party/skia/src/pdf",
    "//third_party/skia/src/ports",
    "//third_party/skia/src/sfnt",
    "//third_party/skia/src/utils",
    "//third_party/skia/src/lazy",
  ]
  if (is_mac || is_ios) {
    include_dirs += [ "//third_party/skia/include/utils/mac" ]
  }
  if (is_mac) {
    include_dirs += [ "//third_party/skia/include/utils/ios" ]
  }

  defines = []

  if (is_component_build) {
    defines += [ "SKIA_IMPLEMENTATION=1" ]
  }

  if (current_cpu == "arm" && !skia_build_no_opts) {
    if (arm_use_neon) {
      defines += [ "SK_ARM_HAS_NEON" ]
    } else if (arm_optionally_use_neon) {
      defines += [ "SK_ARM_HAS_OPTIONAL_NEON" ]
    }
  }

  # Settings for text blitting, chosen to approximate the system browser.
  if (is_linux) {
    defines += [
      "SK_GAMMA_EXPONENT=1.2",
      "SK_GAMMA_CONTRAST=0.2",
    ]
  } else if (is_android) {
    defines += [
      "SK_GAMMA_APPLY_TO_A8",
      "SK_GAMMA_EXPONENT=1.4",
      "SK_GAMMA_CONTRAST=0.0",
    ]
  } else if (is_win) {
    defines += [
      "SK_GAMMA_SRGB",
      "SK_GAMMA_CONTRAST=0.5",
    ]
  } else if (is_mac) {
    defines += [
      "SK_GAMMA_SRGB",
      "SK_GAMMA_CONTRAST=0.0",
    ]
  }

  if (is_android) {
    defines += [
      # Android devices are typically more memory constrained, so default to a
      # smaller glyph cache (it may be overriden at runtime when the renderer
      # starts up, depending on the actual device memory).
      "SK_DEFAULT_FONT_CACHE_LIMIT=1048576",  # 1024 * 1024
    ]
  } else {
    defines += [ "SK_DEFAULT_FONT_CACHE_LIMIT=20971520" ]  # 20 * 1024 * 1024
  }

  if (is_win) {
    include_dirs += [
      "//third_party/skia/include/utils/win",
      "//third_party/skia/src/utils/win",
    ]

    defines += [
      # On windows, GDI handles are a scarse system-wide resource so we have to
      # keep the glyph cache, which holds up to 4 GDI handles per entry, to a
      # fairly small size. http://crbug.com/314387
      "SK_DEFAULT_FONT_CACHE_COUNT_LIMIT=256",
    ]

    cflags = [
      "/wd4244",  # conversion from 'type1( __int64)' to 'type2 (unsigned int)'
      "/wd4267",  # conversion from 'size_t' (64 bit) to 'type'(32 bit).
      "/wd4341",  # signed value is out of range for enum constant.
      "/wd4345",  # Object is default-initialized if initialization is omitted.
      "/wd4390",  # ';'empty statement found in looping;is it what was intended?
      "/wd4554",  # 'operator' : check operator precedence for possible error
      "/wd4748",  # compiler will disable optimizations if a function has inline
                  # assembly code contains flow control(jmp or jcc) statements.

      "/wd4800",  # forcing value to bool 'true/false'(assigning int to bool).
    ]
  }
}

component("skia") {
  sources = [
    # Chrome sources.
    "config/SkUserConfig.h",
    "config/sk_ref_cnt_ext_debug.h",
    "config/sk_ref_cnt_ext_release.h",
    "ext/SkDiscardableMemory_chrome.cc",
    "ext/SkMemory_new_handler.cpp",
    "ext/analysis_canvas.cc",
    "ext/benchmarking_canvas.cc",
    "ext/convolver.cc",
    "ext/event_tracer_impl.cc",
    "ext/fontmgr_default_win.cc",
    "ext/google_logging.cc",
    "ext/image_operations.cc",
    "ext/opacity_filter_canvas.cc",
    "ext/platform_device.cc",
    "ext/platform_device_linux.cc",
    "ext/platform_device_mac.cc",
    "ext/platform_device_win.cc",
    "ext/recursive_gaussian_convolution.cc",
    "ext/skia_histogram.cc",
    "ext/skia_memory_dump_provider.cc",
    "ext/skia_trace_memory_dump_impl.cc",
    "ext/skia_utils_base.cc",
    "ext/skia_utils_ios.mm",
    "ext/skia_utils_mac.mm",
    "ext/skia_utils_win.cc",
  ]

  if (!is_ios) {
    sources += [ "ext/platform_canvas.cc" ]
  }
  if (!is_ios && (current_cpu == "x86" || current_cpu == "x64")) {
    sources += [ "ext/convolver_SSE2.cc" ]
  } else if (current_cpu == "mipsel" && mips_dsp_rev >= 2) {
    sources += [ "ext/convolver_mips_dspr2.cc" ]
  }

  # The skia gypi values are relative to the skia_dir, so we need to rebase.
  sources += skia_core_sources
  sources += skia_effects_sources
  sources += skia_utils_sources
  sources += [
    "//third_party/skia/src/fonts/SkFontMgr_indirect.cpp",
    "//third_party/skia/src/fonts/SkRemotableFontMgr.cpp",
    "//third_party/skia/src/ports/SkFontConfigInterface_direct.cpp",
    "//third_party/skia/src/ports/SkFontConfigInterface_direct_factory.cpp",
    "//third_party/skia/src/ports/SkFontHost_FreeType.cpp",
    "//third_party/skia/src/ports/SkFontHost_FreeType_common.cpp",
    "//third_party/skia/src/ports/SkFontHost_mac.cpp",
    "//third_party/skia/src/ports/SkFontHost_win.cpp",
    "//third_party/skia/src/ports/SkFontMgr_FontConfigInterface.cpp",
    "//third_party/skia/src/ports/SkFontMgr_FontConfigInterface_factory.cpp",
    "//third_party/skia/src/ports/SkFontMgr_android.cpp",
    "//third_party/skia/src/ports/SkFontMgr_android_factory.cpp",
    "//third_party/skia/src/ports/SkFontMgr_android_parser.cpp",
    "//third_party/skia/src/ports/SkFontMgr_win_dw.cpp",
    "//third_party/skia/src/ports/SkGlobalInitialization_default.cpp",
    "//third_party/skia/src/ports/SkImageEncoder_none.cpp",
    "//third_party/skia/src/ports/SkImageGenerator_none.cpp",
    "//third_party/skia/src/ports/SkOSFile_posix.cpp",
    "//third_party/skia/src/ports/SkOSFile_stdio.cpp",
    "//third_party/skia/src/ports/SkOSFile_win.cpp",
    "//third_party/skia/src/ports/SkRemotableFontMgr_win_dw.cpp",
    "//third_party/skia/src/ports/SkScalerContext_win_dw.cpp",
    "//third_party/skia/src/ports/SkTLS_pthread.cpp",
    "//third_party/skia/src/ports/SkTLS_win.cpp",
    "//third_party/skia/src/ports/SkTypeface_win_dw.cpp",
    "//third_party/skia/src/sfnt/SkOTTable_name.cpp",
    "//third_party/skia/src/sfnt/SkOTUtils.cpp",
  ]

  if (is_mac) {
    sources += [ "//third_party/skia/src/utils/mac/SkStream_mac.cpp" ]
  }

  # This and skia_opts are really the same conceptual target so share headers.
  allow_circular_includes_from = [ ":skia_opts" ]

  if (current_cpu == "arm") {
    sources += [ "//third_party/skia/src/core/SkUtilsArm.cpp" ]
  }

  # GPU
  if (skia_support_gpu) {
    sources += skia_gpu_sources
    sources += skia_null_gpu_sources
  }

  # Remove unused util files include in utils.gypi
  sources -= [
    "//third_party/skia/src/utils/SkBoundaryPatch.cpp",
    "//third_party/skia/src/utils/SkCamera.cpp",
    "//third_party/skia/src/utils/SkDumpCanvas.cpp",
    "//third_party/skia/src/utils/SkFrontBufferedStream.cpp",
    "//third_party/skia/src/utils/SkInterpolator.cpp",
    "//third_party/skia/src/utils/SkLayer.cpp",
    "//third_party/skia/src/utils/SkMeshUtils.cpp",
    "//third_party/skia/src/utils/SkOSFile.cpp",
    "//third_party/skia/src/utils/SkParsePath.cpp",

    # Testing.
    "//third_party/skia/src/fonts/SkGScalerContext.cpp",
  ]

  if (is_win) {
    sources -= [
      # Keeping _win.cpp
      "//third_party/skia/src/utils/SkThreadUtils_pthread.cpp",
    ]
  } else {
    sources -= [
      # Keeping _pthread.cpp
      "//third_party/skia/src/utils/SkThreadUtils_win.cpp",
    ]
  }

  # need separate win section to handle chromes auto gn filter
  # (build/config/BUILDCONFIG.gn)
  if (is_win) {
    sources -= [
      #windows
      "//third_party/skia/src/utils/win/SkAutoCoInitialize.cpp",
      "//third_party/skia/src/utils/win/SkIStream.cpp",
      "//third_party/skia/src/utils/win/SkWGL_win.cpp",
    ]
  }

  if (is_android && (!enable_basic_printing && !enable_print_preview)) {
    sources -= [ "ext/skia_utils_base.cc" ]
  }

  # Fixup skia library sources.
  if (is_win) {
    sources -= [
      "//third_party/skia/src/ports/SkOSFile_posix.cpp",
      "//third_party/skia/src/ports/SkTLS_pthread.cpp",
    ]
  } else {
    sources -= [
      "//third_party/skia/src/ports/SkFontHost_win.cpp",
      "//third_party/skia/src/ports/SkFontMgr_win_dw.cpp",
      "//third_party/skia/src/ports/SkOSFile_win.cpp",
      "//third_party/skia/src/ports/SkRemotableFontMgr_win_dw.cpp",
      "//third_party/skia/src/ports/SkScalerContext_win_dw.cpp",
      "//third_party/skia/src/ports/SkTLS_win.cpp",
      "//third_party/skia/src/ports/SkTypeface_win_dw.cpp",
    ]
  }
  if (!is_android) {
    sources -= [
      "//third_party/skia/src/ports/SkFontMgr_android.cpp",
      "//third_party/skia/src/ports/SkFontMgr_android_factory.cpp",
      "//third_party/skia/src/ports/SkFontMgr_android_parser.cpp",
    ]
  }
  if (!is_mac) {
    sources -= [ "//third_party/skia/src/ports/SkFontHost_mac.cpp" ]
  }

  if (!is_linux) {
    sources -= [
      "//third_party/skia/src/ports/SkFontConfigInterface_direct.cpp",
      "//third_party/skia/src/ports/SkFontConfigInterface_direct_factory.cpp",
      "//third_party/skia/src/ports/SkFontMgr_FontConfigInterface.cpp",
      "//third_party/skia/src/ports/SkFontMgr_FontConfigInterface_factory.cpp",
    ]
  }

  # Add the files for the SkFontMgr_Android. This is used to emulate android
  # fonts on linux. See content/zygote/zygote_main_linux.cc
  if (is_linux) {
    sources += [
      "//third_party/skia/src/ports/SkFontMgr_android.cpp",
      "//third_party/skia/src/ports/SkFontMgr_android_parser.cpp",
    ]
  }

  if (!is_linux && !is_android) {
    sources -= [
      "//third_party/skia/src/ports/SkFontHost_FreeType.cpp",
      "//third_party/skia/src/ports/SkFontHost_FreeType_common.cpp",
    ]
  }

  # Select the right BitmapPlatformDevice.
  if (is_win) {
    sources += [ "ext/bitmap_platform_device_win.cc" ]
  } else if (is_mac) {
    sources += [ "ext/bitmap_platform_device_mac.cc" ]
  } else if (use_cairo) {
    sources += [ "ext/bitmap_platform_device_cairo.cc" ]
  } else if (!is_ios) {
    sources += [ "ext/bitmap_platform_device_skia.cc" ]
  }

  if (is_clang && !is_nacl) {
    # Skia won't compile with some of the more strict clang warnings.
    # e.g. it does:
    #  SkASSERT(!"sk_out_of_memory");
    configs -= [ "//build/config/clang:extra_warnings" ]
  }

  configs -= [ "//build/config/compiler:chromium_code" ]
  configs += [
    ":skia_config",
    ":skia_library_config",
    "//build/config/compiler:no_chromium_code",
  ]
  public_configs = [ ":skia_config" ]

  deps = [
    ":skia_opts",
    "//base",
    "//base/third_party/dynamic_annotations",
  ]

  if (is_linux) {
    if (use_pango) {
      configs += [ "//build/config/linux/pangocairo" ]
    }
    deps += [
      "//build/linux:fontconfig",
      "//build/linux:freetype2",
      "//third_party/expat",
      "//third_party/icu:icuuc",
    ]
  }

  if (is_android) {
    set_sources_assignment_filter([])
    sources += [ "ext/platform_device_linux.cc" ]
    set_sources_assignment_filter(sources_assignment_filter)
    deps += [
      "//third_party/android_tools:cpu_features",
      "//third_party/expat",
      "//third_party/freetype-android:freetype",
    ]
  }

  if (skia_support_pdf) {
    deps += [
      "//third_party/sfntly",
      "//third_party/zlib",
    ]
    sources += skia_pdf_sources
  } else {
    sources += [ "//third_party/skia/src/pdf/SkDocument_PDF_None.cpp" ]
  }

  if ((is_android || is_win) && !is_debug) {
    configs -= [ "//build/config/compiler:default_optimization" ]
    configs += [ "//build/config/compiler:optimize_max" ]
  }

  if (is_mac) {
    libs = [
      "AppKit.framework",
      "CoreFoundation.framework",
      "CoreGraphics.framework",
      "CoreText.framework",
      "Foundation.framework",
    ]
  }

  if (is_ios) {
    libs = [ "ImageIO.framework" ]
    set_sources_assignment_filter([])
    sources += [
      "//third_party/skia/src/ports/SkFontHost_mac.cpp",
      "//third_party/skia/src/utils/mac/SkCreateCGImageRef.cpp",
      "//third_party/skia/src/utils/mac/SkStream_mac.cpp",
    ]
    set_sources_assignment_filter(sources_assignment_filter)

    # SkFontHost_mac.cpp uses API deprecated in iOS 7, crbug.com/408571
    cflags = [ "-Wno-deprecated-declarations" ]
  }
}

# Separated out so it can be compiled with different flags for SSE.
if (!skia_build_no_opts) {
  if (current_cpu == "arm64") {
    source_set("skia_opts_crc32") {
      sources = skia_opts.crc32_sources
      cflags = [ "-march=armv8-a+crc" ]
      visibility = [ ":skia_opts" ]
      configs -= [ "//build/config/compiler:chromium_code" ]
      configs += [
        ":skia_config",
        ":skia_library_config",
        "//build/config/compiler:no_chromium_code",
      ]
    }
  }
  if (current_cpu == "x86" || current_cpu == "x64") {
    source_set("skia_opts_sse3") {
      sources = skia_opts.ssse3_sources
      if (!is_win || is_clang) {
        cflags = [ "-mssse3" ]
      }
      if (is_win) {
        defines = [ "SK_CPU_SSE_LEVEL=31" ]
      }
      visibility = [ ":skia_opts" ]
      configs -= [ "//build/config/compiler:chromium_code" ]
      configs += [
        ":skia_config",
        ":skia_library_config",
        "//build/config/compiler:no_chromium_code",
      ]
    }
    source_set("skia_opts_sse41") {
      sources = skia_opts.sse41_sources
      if (!is_win || is_clang) {
        cflags = [ "-msse4.1" ]
      }
      if (is_win) {
        defines = [ "SK_CPU_SSE_LEVEL=41" ]
      }
      visibility = [ ":skia_opts" ]
      configs -= [ "//build/config/compiler:chromium_code" ]
      configs += [
        ":skia_config",
        ":skia_library_config",
        "//build/config/compiler:no_chromium_code",
      ]
    }
    source_set("skia_opts_sse42") {
      sources = skia_opts.sse42_sources
      if (!is_win || is_clang) {
        cflags = [ "-msse4.2" ]
      }
      if (is_win) {
        defines = [ "SK_CPU_SSE_LEVEL=42" ]
      }
      visibility = [ ":skia_opts" ]
      configs -= [ "//build/config/compiler:chromium_code" ]
      configs += [
        ":skia_config",
        ":skia_library_config",
        "//build/config/compiler:no_chromium_code",
      ]
    }
    source_set("skia_opts_avx") {
      sources = skia_opts.avx_sources
      if (!is_win) {
        cflags = [ "-mavx" ]
      }
      if (is_win) {
        cflags = [ "/arch:AVX" ]
      }
      visibility = [ ":skia_opts" ]
      configs -= [ "//build/config/compiler:chromium_code" ]
      configs += [
        ":skia_config",
        ":skia_library_config",
        "//build/config/compiler:no_chromium_code",
      ]
    }
    source_set("skia_opts_avx2") {
      sources = skia_opts.avx2_sources
      if (!is_win) {
        cflags = [ "-mavx2" ]
      }
      if (is_win) {
        cflags = [ "/arch:AVX2" ]
      }
      visibility = [ ":skia_opts" ]
      configs -= [ "//build/config/compiler:chromium_code" ]
      configs += [
        ":skia_config",
        ":skia_library_config",
        "//build/config/compiler:no_chromium_code",
      ]
    }
  }
}

source_set("skia_opts") {
  cflags = []
  defines = []

  deps = [
    "//base",
  ]

  if (skia_build_no_opts) {
    sources = skia_opts.none_sources
  } else if (current_cpu == "x86" || current_cpu == "x64") {
    sources = skia_opts.sse2_sources
    deps += [
      ":skia_opts_avx",
      ":skia_opts_avx2",
      ":skia_opts_sse3",
      ":skia_opts_sse41",
      ":skia_opts_sse42",
    ]
  } else if (current_cpu == "arm") {
    # The assembly uses the frame pointer register (r7 in Thumb/r11 in
    # ARM), the compiler doesn't like that.
    cflags += [ "-fomit-frame-pointer" ]

    if (arm_version >= 7) {
      sources = skia_opts.armv7_sources
      if (arm_use_neon || arm_optionally_use_neon) {
        sources += skia_opts.neon_sources

        # Root build config sets -mfpu=$arm_fpu, which we expect to be neon
        # when running this.
        if (!arm_use_neon) {
          configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
          cflags += [ "-mfpu=neon" ]
        }
      }
    } else {
      sources = skia_opts.none_sources
    }
  } else if (current_cpu == "arm64") {
    sources = skia_opts.arm64_sources
    deps += [ ":skia_opts_crc32" ]
  } else if (current_cpu == "mipsel") {
    cflags += [ "-fomit-frame-pointer" ]

    if (mips_dsp_rev >= 1) {
      sources = skia_opts.mips_dsp_sources
    } else {
      sources = skia_opts.none_sources
    }
  } else if (current_cpu == "mips64el") {
    cflags += [ "-fomit-frame-pointer" ]
    sources = skia_opts.none_sources
  } else {
    assert(false, "Need to port cpu specific stuff from skia_library_opts.gyp")
  }

  if ((is_android || is_win) && !is_debug) {
    configs -= [ "//build/config/compiler:default_optimization" ]
    configs += [ "//build/config/compiler:optimize_max" ]
  }

  configs -= [ "//build/config/compiler:chromium_code" ]
  configs += [
    ":skia_config",
    ":skia_library_config",
    "//build/config/compiler:no_chromium_code",
  ]

  visibility = [ ":skia" ]
}

test("skia_unittests") {
  sources = [
    "ext/analysis_canvas_unittest.cc",
    "ext/bitmap_platform_device_mac_unittest.cc",
    "ext/convolver_unittest.cc",
    "ext/image_operations_unittest.cc",
    "ext/platform_canvas_unittest.cc",
    "ext/recursive_gaussian_convolution_unittest.cc",
    "ext/skia_memory_dump_provider_unittest.cc",
    "ext/skia_utils_ios_unittest.mm",
    "ext/skia_utils_mac_unittest.mm",
  ]

  if (!is_win && !is_mac) {
    sources -= [ "ext/platform_canvas_unittest.cc" ]
  }

  deps = [
    ":skia",
    "//base",
    "//mojo/edk/test:run_all_unittests",
    "//testing/gtest",
    "//ui/gfx",
    "//ui/gfx/geometry",
  ]

  if (!is_ios) {
    sources += [ "public/interfaces/test/struct_traits_unittest.cc" ]
    deps += [
      # TODO: Fix this test to not depend on cc.
      "//cc:test_support",
      "//mojo/public/cpp/bindings",
      "//skia/public/interfaces:test_interfaces",
    ]
  }
}

if (!is_ios) {
  executable("image_operations_bench") {
    sources = [
      "ext/image_operations_bench.cc",
    ]

    deps = [
      ":skia",
      "//base",
      "//build/config/sanitizers:deps",
      "//build/win:default_exe_manifest",
    ]
  }

  executable("filter_fuzz_stub") {
    testonly = true
    sources = [
      "tools/filter_fuzz_stub/filter_fuzz_stub.cc",
    ]

    deps = [
      ":skia",
      "//base",
      "//base/test:test_support",
      "//build/config/sanitizers:deps",
      "//build/win:default_exe_manifest",
    ]
  }
}