Reland "Build SkRawCodec in GN"

BUILD.gn

 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("gn/android_framework_defines.gni")
 import("gn/shared_sources.gni")
 
 if (!defined(is_skia_standalone)) {
   is_skia_standalone = false
 }
 
 declare_args() {
   skia_use_angle = false
   skia_use_expat = true
   skia_use_fontconfig = is_linux
   skia_use_freetype = is_android || is_fuchsia || is_linux
   skia_use_gdi = false
   skia_use_libjpeg_turbo = true
   skia_use_libpng = true
   skia_use_libwebp = !is_fuchsia
   skia_use_mesa = false
+  skia_use_raw = !is_win
   skia_use_sfntly = !is_fuchsia && !is_win  # TODO: icu on Windows, re-enable this.
   skia_use_zlib = true
 
   skia_enable_android_framework_defines = false
   skia_enable_gpu = true
   skia_enable_tools = is_skia_standalone
   skia_enable_vulkan_debug_layers = is_skia_standalone && is_debug
   skia_vulkan_sdk = getenv("VULKAN_SDK")
 }
 
@@ skipping 244 matching lines @@
       if (defined(invoker.public_defines)) {
         defines = invoker.public_defines
       }
     }
     source_set(target_name) {
       forward_variables_from(invoker,
                              "*",
                              [
                                "public_defines",
                                "sources_when_disabled",
+                               "configs_to_remove",
                              ])
       all_dependent_configs = [ ":" + target_name + "_public" ]
       configs += skia_library_configs
+      if (defined(invoker.configs_to_remove)) {
+        configs -= invoker.configs_to_remove
+      }
     }
   } else {
     source_set(target_name) {
       forward_variables_from(invoker,
                              "*",
                              [
                                "public_defines",
                                "deps",
                                "libs",
                                "sources",
                                "sources_when_disabled",
+                               "configs_to_remove",
                              ])
       if (defined(invoker.sources_when_disabled)) {
         sources = invoker.sources_when_disabled
       }
       configs += skia_library_configs
     }
   }
 }
 
 optional("fontmgr_android") {
@@ skipping 124 matching lines @@
   deps = [
     "//third_party/libpng",
   ]
   sources = [
     "src/codec/SkIcoCodec.cpp",
     "src/codec/SkPngCodec.cpp",
     "src/images/SkPNGImageEncoder.cpp",
   ]
 }
 
+optional("raw") {
+  enabled = skia_use_raw && skia_use_libjpeg_turbo && skia_use_zlib
+  public_defines = [ "SK_CODEC_DECODES_RAW" ]
+
+  deps = [
+    "//third_party/dng_sdk",
+    "//third_party/libjpeg-turbo:libjpeg",
+    "//third_party/piex",
+  ]
+
+  # SkRawCodec catches any exceptions thrown by dng_sdk, insulating the rest of
+  # Skia.
+  configs_to_remove = [ "//gn:no_exceptions" ]
+
+  sources = [
+    "src/codec/SkRawAdapterCodec.cpp",
+    "src/codec/SkRawCodec.cpp",
+  ]
+}
+
 optional("typeface_freetype") {
   enabled = skia_use_freetype
 
   deps = [
     "//third_party/freetype2",
   ]
   sources = [
     "src/ports/SkFontHost_FreeType.cpp",
     "src/ports/SkFontHost_FreeType_common.cpp",
   ]
@@ skipping 39 matching lines @@
     ":fontmgr_android",
     ":fontmgr_custom",
     ":fontmgr_fontconfig",
     ":fontmgr_fuchsia",
     ":gpu",
     ":hsw",
     ":jpeg",
     ":none",
     ":pdf",
     ":png",
+    ":raw",
     ":sse2",
     ":sse41",
     ":sse42",
     ":ssse3",
     ":typeface_freetype",
     ":webp",
     ":xml",
   ]
 
   sources = []
@@ skipping 736 matching lines @@
       ]
       if (is_android) {
         deps += [ "//third_party/native_app_glue" ]
       } else if (is_mac) {
         deps += [ "//third_party/libsdl" ]
       }
       testonly = true
     }
   }
 }