modules/canvaskit/BUILD.bazel - skia - Git at Google

 load("//bazel:macros.bzl", "bool_flag", "exports_files_legacy", "wasm_cc_binary")
 load("//bazel:karma_test.bzl", "karma_test")
 load("//bazel:copts.bzl", "DEFAULT_COPTS")

 licenses(["notice"])

 exports_files_legacy()

 BASE_LINKOPTS = [
     #"-flto",  # https://github.com/emscripten-core/emsdk/issues/807
     "--bind",  # Compiles the source code using the Embind bindings to connect C/C++ and JavaScript
     "-fno-rtti",
     "--no-entry",
     "-sALLOW_MEMORY_GROWTH",
     "-sUSE_PTHREADS=0",  # Disable pthreads
     "-sMODULARIZE",
     "-sDISABLE_EXCEPTION_CATCHING",  # Disable all exception catching
     "-sNODEJS_CATCH_EXIT=0",  # We don't have a 'main' so disable exit() catching
     "-sWASM",
     "-sMAX_WEBGL_VERSION=2",
     "-sUSE_WEBGL2=1",
     "-sFORCE_FILESYSTEM=0",
     "-sDYNAMIC_EXECUTION=0",
     "-sFILESYSTEM=0",
     "-sEXPORTED_FUNCTIONS=['_malloc','_free']",
 ]

 RELEASE_OPTS = [
     "-sASSERTIONS=0",  # Turn off assertions
     "-Oz",
 ]

 DEBUG_OPTS = [
     "--closure 0",  # Do not use closure
     "-sASSERTIONS",  # Turn on assertions
     "-sGL_ASSERTIONS",
     "-O0",
     "-g3",
     "--source-map-base=/build/",
 ]

 filegroup(
     name = "hdrs",
     srcs = [
         "WasmCommon.h",
     ],
 )

 # See https://stackoverflow.com/a/57499321 for reference.
 genrule(
     name = "create_notomono_cpp",
     srcs = ["fonts/NotoMono-Regular.ttf"],
     outs = ["fonts/NotoMono-Regular.ttf.bazel.cpp"],  # Distinct name from compile.sh's version
     cmd = "$(location //tools:embed_resources) --name=SK_EMBEDDED_FONTS " +
           "--input=modules/canvaskit/fonts/NotoMono-Regular.ttf " +
           # The $@ means substitute in the one and only output location, which will be located
           # in //bazel-out, not in the fonts subdirectory (although it will be available to clients
           # in the fonts/ subdirectory as if it had been there all along.
           "--output=$@ " +
           "--align=4",
     exec_tools = ["//tools:embed_resources"],
 )

 # Note: These are defines that only impact the _bindings.cpp files in this folder.
 # Any defines that need to effect the entire Skia build should go in //bazel/BUILD.bazel
 CK_DEFINES = [
     "CK_INCLUDE_PATHOPS",
     "EMSCRIPTEN_HAS_UNBOUND_TYPE_NAMES=0",  # Allows us to compile with -fno-rtti
 ] + select({
     ":enable_fonts_true": ["CK_INCLUDE_PARAGRAPH"],
     ":enable_fonts_false": ["CK_NO_FONTS"],
 }) + select({
     ":enable_skp_serialization_true": ["CK_SERIALIZE_SKP=1"],
     ":enable_skp_serialization_false": [],
 }) + select({
     ":enable_runtime_effect_true": ["CK_INCLUDE_RUNTIME_EFFECT=1"],
     ":enable_runtime_effect_false": [],
 }) + select({
     "//src/gpu:gl_backend": ["CK_ENABLE_WEBGL"],
     "//conditions:default": [],
 })

 CK_RELEASE_OPTS = [
     "--closure 1",  # Run the closure compiler
     # pass the externs file in
     "--closure-args=--externs=$(location externs.js)",
 ]

 CK_LINKOPTS = BASE_LINKOPTS + [
     "-sEXPORT_NAME=CanvasKitInit",
     "-sINITIAL_MEMORY=128MB",
     # The order of these --pre-js flags matters! The preamble is a partially open scope and the
     # postamble closes it. TODO(kjlubick) do we need to do it this way anymore?
     "--pre-js",
     "modules/canvaskit/preamble.js",
     "--pre-js",
     "modules/canvaskit/color.js",
     "--pre-js",
     "modules/canvaskit/memory.js",
     "--pre-js",
     "modules/canvaskit/util.js",
     "--pre-js",
     "modules/canvaskit/interface.js",
     "--pre-js",
     "modules/canvaskit/pathops.js",
 ] + select({
     "//src/gpu:gl_backend": [
         "--pre-js",
         "modules/canvaskit/cpu.js",
         "--pre-js",
         "modules/canvaskit/webgl.js",
     ],
     "//conditions:default": [
         "--pre-js",
         "modules/canvaskit/cpu.js",
     ],
 }) + select({
     ":enable_fonts_true": [
         "--pre-js",
         "modules/canvaskit/font.js",
         "--pre-js",
         "modules/canvaskit/paragraph.js",
     ],
     ":enable_fonts_false": [],
 }) + select({
     ":enable_canvas_polyfill_true": [
         "--pre-js",
         "modules/canvaskit/htmlcanvas/preamble.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/util.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/color.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/font.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/canvas2dcontext.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/htmlcanvas.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/htmlimage.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/imagedata.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/lineargradient.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/path2d.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/pattern.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/radialgradient.js",
         "--pre-js",
         "modules/canvaskit/htmlcanvas/postamble.js",
     ],
     ":enable_canvas_polyfill_false": [],
 }) + select({
     ":enable_skottie_true": [
         "--pre-js",
         "modules/canvaskit/skottie.js",
     ],
     ":enable_skottie_false": [],
 }) + select({
     ":enable_skp_serialization_true": [
         "--pre-js",
         "modules/canvaskit/skp.js",
     ],
     ":enable_skp_serialization_false": [],
 }) + select({
     ":enable_particles_true": [
         "--pre-js",
         "modules/canvaskit/particles.js",
     ],
     ":enable_particles_false": [],
 }) + select({
     ":enable_runtime_effect_true": [
         "--pre-js",
         "modules/canvaskit/rt_shader.js",
     ],
     ":enable_runtime_effect_false": [],
 }) + select({
     ":include_matrix_js_true": [
         "--pre-js",
         "modules/canvaskit/matrix.js",
     ],
     ":include_matrix_js_false": [],
 }) + [
     # This must come last
     "--pre-js",
     "modules/canvaskit/postamble.js",
 ] + select({
     "//bazel/common_config_settings:debug_build": DEBUG_OPTS + [
         "--pre-js",
         "modules/canvaskit/debug.js",
     ],
     "//conditions:default": RELEASE_OPTS + CK_RELEASE_OPTS + [
         "--pre-js",
         "modules/canvaskit/release.js",
     ],
 })

 # All JS files that could possibly be included via --pre-js or --post-js.
 # Whether they actually will be or not will be controlled above in the construction of CK_LINKOPTS.
 JS_INTERFACE_FILES = [
     "color.js",
     "cpu.js",
     "debug.js",
     "font.js",
     "interface.js",
     "matrix.js",
     "memory.js",
     "paragraph.js",
     "particles.js",
     "pathops.js",
     "postamble.js",
     "preamble.js",
     "release.js",
     "rt_shader.js",
     "skottie.js",
     "skp.js",
     "util.js",
     "webgl.js",
     "webgpu.js",
 ] + [
     "htmlcanvas/canvas2dcontext.js",
     "htmlcanvas/color.js",
     "htmlcanvas/font.js",
     "htmlcanvas/htmlcanvas.js",
     "htmlcanvas/htmlimage.js",
     "htmlcanvas/imagedata.js",
     "htmlcanvas/lineargradient.js",
     "htmlcanvas/path2d.js",
     "htmlcanvas/pattern.js",
     "htmlcanvas/postamble.js",
     "htmlcanvas/preamble.js",
     "htmlcanvas/radialgradient.js",
     "htmlcanvas/util.js",
 ]

 CK_SRCS = [
     "canvaskit_bindings.cpp",
     ":hdrs",
 ] + select({
     ":include_embedded_font_true": ["fonts/NotoMono-Regular.ttf.bazel.cpp"],
     ":include_embedded_font_false": [],
 }) + select({
     ":enable_fonts_true": [
         "paragraph_bindings.cpp",
         "paragraph_bindings_gen.cpp",
     ],
     ":enable_fonts_false": [],
 }) + select({
     ":enable_skottie_true": ["skottie_bindings.cpp"],
     ":enable_skottie_false": [],
 }) + select({
     ":enable_particles_true": ["particles_bindings.cpp"],
     ":enable_particles_false": [],
 })

 CK_COPTS = [
     "-Wno-header-hygiene",
 ]

 cc_binary(
     name = "canvaskit.build",
     srcs = CK_SRCS,
     additional_linker_inputs = JS_INTERFACE_FILES + ["externs.js"],
     copts = DEFAULT_COPTS + CK_COPTS,
     linkopts = CK_LINKOPTS,
     local_defines = CK_DEFINES,
     # This target won't build successfully on its own because of missing emscripten
     # headers etc. Therefore, we hide it from wildcards.
     tags = ["manual"],
     deps = [
         "//:skia_public",
     ] + select({
         ":enable_fonts_true": [
             "//modules/skparagraph",
             "//modules/skunicode",
         ],
         ":enable_fonts_false": [],
     }) + select({
         ":enable_skottie_true": [
             "//modules/skottie",
             "//modules/skottie:utils",
         ],
         ":enable_skottie_false": [],
     }) + select({
         ":enable_particles_true": [
             "//modules/particles",
         ],
         ":enable_particles_false": [],
     }),
 )

 wasm_cc_binary(
     name = "canvaskit",
     # Whatever is before the dot will be the name of the output js and wasm, aka "the stem".
     # https://github.com/emscripten-core/emsdk/blob/82ad00499a42abde16b363239d2bc83bf5d863ab/bazel/emscripten_toolchain/wasm_cc_binary.bzl#L91
     cc_target = ":canvaskit.build",
 )

 bool_flag(
     name = "enable_canvas_polyfill",
     default = False,
 )

 bool_flag(
     name = "enable_fonts",
     default = False,
 )

 bool_flag(
     name = "include_embedded_font",
     default = False,
 )

 bool_flag(
     name = "include_matrix_js",
     default = False,
 )

 bool_flag(
     name = "enable_skottie",
     default = False,
 )

 bool_flag(
     name = "enable_skp_serialization",
     default = False,
 )

 bool_flag(
     name = "enable_particles",
     default = False,
 )

 bool_flag(
     name = "enable_runtime_effect",
     default = False,
 )

 karma_test(
     name = "canvaskit_js_tests",
     srcs = [
         ":canvaskit/canvaskit.js",
         # We want to make sure the CanvasKit JS is loaded before the loader script
         "tests/bazel/canvaskitinit.js",
         "tests/bazel/util.js",
         "tests/bazel/test_reporter.js",
         # which is loaded before the tests...
         "tests/bazel/smoke_test.js",
         "tests/bazel/canvas_test.js",
         "tests/bazel/canvas2d_test.js",
         "tests/bazel/core_test.js",
         "tests/bazel/font_test.js",
         "tests/bazel/matrix_test.js",
         "tests/bazel/paragraph_test.js",
         "tests/bazel/path_test.js",
         "tests/bazel/rtshader_test.js",
         "tests/bazel/skottie_test.js",
     ],
     config_file = "karma.bazel.js",
     # The tests need the Gold server to be up and running so they can make POST requests to
     # exfiltrate the PNGs they create.
     env = "//modules/canvaskit/go/gold_test_env:gold_test_env",
     static_files = [
         ":canvaskit/canvaskit.wasm",
         "//modules/canvaskit/tests/assets:test_assets",
     ],
 )
	load("//bazel:macros.bzl", "bool_flag", "exports_files_legacy", "wasm_cc_binary")
	load("//bazel:karma_test.bzl", "karma_test")
	load("//bazel:copts.bzl", "DEFAULT_COPTS")

	licenses(["notice"])

	exports_files_legacy()

	BASE_LINKOPTS = [
	#"-flto", # https://github.com/emscripten-core/emsdk/issues/807
	"--bind", # Compiles the source code using the Embind bindings to connect C/C++ and JavaScript
	"-fno-rtti",
	"--no-entry",
	"-sALLOW_MEMORY_GROWTH",
	"-sUSE_PTHREADS=0", # Disable pthreads
	"-sMODULARIZE",
	"-sDISABLE_EXCEPTION_CATCHING", # Disable all exception catching
	"-sNODEJS_CATCH_EXIT=0", # We don't have a 'main' so disable exit() catching
	"-sWASM",
	"-sMAX_WEBGL_VERSION=2",
	"-sUSE_WEBGL2=1",
	"-sFORCE_FILESYSTEM=0",
	"-sDYNAMIC_EXECUTION=0",
	"-sFILESYSTEM=0",
	"-sEXPORTED_FUNCTIONS=['_malloc','_free']",
	]

	RELEASE_OPTS = [
	"-sASSERTIONS=0", # Turn off assertions
	"-Oz",
	]

	DEBUG_OPTS = [
	"--closure 0", # Do not use closure
	"-sASSERTIONS", # Turn on assertions
	"-sGL_ASSERTIONS",
	"-O0",
	"-g3",
	"--source-map-base=/build/",
	]

	filegroup(
	name = "hdrs",
	srcs = [
	"WasmCommon.h",
	],
	)

	# See https://stackoverflow.com/a/57499321 for reference.
	genrule(
	name = "create_notomono_cpp",
	srcs = ["fonts/NotoMono-Regular.ttf"],
	outs = ["fonts/NotoMono-Regular.ttf.bazel.cpp"], # Distinct name from compile.sh's version
	cmd = "$(location //tools:embed_resources) --name=SK_EMBEDDED_FONTS " +
	"--input=modules/canvaskit/fonts/NotoMono-Regular.ttf " +
	# The $@ means substitute in the one and only output location, which will be located
	# in //bazel-out, not in the fonts subdirectory (although it will be available to clients
	# in the fonts/ subdirectory as if it had been there all along.
	"--output=$@ " +
	"--align=4",
	exec_tools = ["//tools:embed_resources"],
	)

	# Note: These are defines that only impact the _bindings.cpp files in this folder.
	# Any defines that need to effect the entire Skia build should go in //bazel/BUILD.bazel
	CK_DEFINES = [
	"CK_INCLUDE_PATHOPS",
	"EMSCRIPTEN_HAS_UNBOUND_TYPE_NAMES=0", # Allows us to compile with -fno-rtti
	] + select({
	":enable_fonts_true": ["CK_INCLUDE_PARAGRAPH"],
	":enable_fonts_false": ["CK_NO_FONTS"],
	}) + select({
	":enable_skp_serialization_true": ["CK_SERIALIZE_SKP=1"],
	":enable_skp_serialization_false": [],
	}) + select({
	":enable_runtime_effect_true": ["CK_INCLUDE_RUNTIME_EFFECT=1"],
	":enable_runtime_effect_false": [],
	}) + select({
	"//src/gpu:gl_backend": ["CK_ENABLE_WEBGL"],
	"//conditions:default": [],
	})

	CK_RELEASE_OPTS = [
	"--closure 1", # Run the closure compiler
	# pass the externs file in
	"--closure-args=--externs=$(location externs.js)",
	]

	CK_LINKOPTS = BASE_LINKOPTS + [
	"-sEXPORT_NAME=CanvasKitInit",
	"-sINITIAL_MEMORY=128MB",
	# The order of these --pre-js flags matters! The preamble is a partially open scope and the
	# postamble closes it. TODO(kjlubick) do we need to do it this way anymore?
	"--pre-js",
	"modules/canvaskit/preamble.js",
	"--pre-js",
	"modules/canvaskit/color.js",
	"--pre-js",
	"modules/canvaskit/memory.js",
	"--pre-js",
	"modules/canvaskit/util.js",
	"--pre-js",
	"modules/canvaskit/interface.js",
	"--pre-js",
	"modules/canvaskit/pathops.js",
	] + select({
	"//src/gpu:gl_backend": [
	"--pre-js",
	"modules/canvaskit/cpu.js",
	"--pre-js",
	"modules/canvaskit/webgl.js",
	],
	"//conditions:default": [
	"--pre-js",
	"modules/canvaskit/cpu.js",
	],
	}) + select({
	":enable_fonts_true": [
	"--pre-js",
	"modules/canvaskit/font.js",
	"--pre-js",
	"modules/canvaskit/paragraph.js",
	],
	":enable_fonts_false": [],
	}) + select({
	":enable_canvas_polyfill_true": [
	"--pre-js",
	"modules/canvaskit/htmlcanvas/preamble.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/util.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/color.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/font.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/canvas2dcontext.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/htmlcanvas.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/htmlimage.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/imagedata.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/lineargradient.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/path2d.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/pattern.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/radialgradient.js",
	"--pre-js",
	"modules/canvaskit/htmlcanvas/postamble.js",
	],
	":enable_canvas_polyfill_false": [],
	}) + select({
	":enable_skottie_true": [
	"--pre-js",
	"modules/canvaskit/skottie.js",
	],
	":enable_skottie_false": [],
	}) + select({
	":enable_skp_serialization_true": [
	"--pre-js",
	"modules/canvaskit/skp.js",
	],
	":enable_skp_serialization_false": [],
	}) + select({
	":enable_particles_true": [
	"--pre-js",
	"modules/canvaskit/particles.js",
	],
	":enable_particles_false": [],
	}) + select({
	":enable_runtime_effect_true": [
	"--pre-js",
	"modules/canvaskit/rt_shader.js",
	],
	":enable_runtime_effect_false": [],
	}) + select({
	":include_matrix_js_true": [
	"--pre-js",
	"modules/canvaskit/matrix.js",
	],
	":include_matrix_js_false": [],
	}) + [
	# This must come last
	"--pre-js",
	"modules/canvaskit/postamble.js",
	] + select({
	"//bazel/common_config_settings:debug_build": DEBUG_OPTS + [
	"--pre-js",
	"modules/canvaskit/debug.js",
	],
	"//conditions:default": RELEASE_OPTS + CK_RELEASE_OPTS + [
	"--pre-js",
	"modules/canvaskit/release.js",
	],
	})

	# All JS files that could possibly be included via --pre-js or --post-js.
	# Whether they actually will be or not will be controlled above in the construction of CK_LINKOPTS.
	JS_INTERFACE_FILES = [
	"color.js",
	"cpu.js",
	"debug.js",
	"font.js",
	"interface.js",
	"matrix.js",
	"memory.js",
	"paragraph.js",
	"particles.js",
	"pathops.js",
	"postamble.js",
	"preamble.js",
	"release.js",
	"rt_shader.js",
	"skottie.js",
	"skp.js",
	"util.js",
	"webgl.js",
	"webgpu.js",
	] + [
	"htmlcanvas/canvas2dcontext.js",
	"htmlcanvas/color.js",
	"htmlcanvas/font.js",
	"htmlcanvas/htmlcanvas.js",
	"htmlcanvas/htmlimage.js",
	"htmlcanvas/imagedata.js",
	"htmlcanvas/lineargradient.js",
	"htmlcanvas/path2d.js",
	"htmlcanvas/pattern.js",
	"htmlcanvas/postamble.js",
	"htmlcanvas/preamble.js",
	"htmlcanvas/radialgradient.js",
	"htmlcanvas/util.js",
	]

	CK_SRCS = [
	"canvaskit_bindings.cpp",
	":hdrs",
	] + select({
	":include_embedded_font_true": ["fonts/NotoMono-Regular.ttf.bazel.cpp"],
	":include_embedded_font_false": [],
	}) + select({
	":enable_fonts_true": [
	"paragraph_bindings.cpp",
	"paragraph_bindings_gen.cpp",
	],
	":enable_fonts_false": [],
	}) + select({
	":enable_skottie_true": ["skottie_bindings.cpp"],
	":enable_skottie_false": [],
	}) + select({
	":enable_particles_true": ["particles_bindings.cpp"],
	":enable_particles_false": [],
	})

	CK_COPTS = [
	"-Wno-header-hygiene",
	]

	cc_binary(
	name = "canvaskit.build",
	srcs = CK_SRCS,
	additional_linker_inputs = JS_INTERFACE_FILES + ["externs.js"],
	copts = DEFAULT_COPTS + CK_COPTS,
	linkopts = CK_LINKOPTS,
	local_defines = CK_DEFINES,
	# This target won't build successfully on its own because of missing emscripten
	# headers etc. Therefore, we hide it from wildcards.
	tags = ["manual"],
	deps = [
	"//:skia_public",
	] + select({
	":enable_fonts_true": [
	"//modules/skparagraph",
	"//modules/skunicode",
	],
	":enable_fonts_false": [],
	}) + select({
	":enable_skottie_true": [
	"//modules/skottie",
	"//modules/skottie:utils",
	],
	":enable_skottie_false": [],
	}) + select({
	":enable_particles_true": [
	"//modules/particles",
	],
	":enable_particles_false": [],
	}),
	)

	wasm_cc_binary(
	name = "canvaskit",
	# Whatever is before the dot will be the name of the output js and wasm, aka "the stem".
	# https://github.com/emscripten-core/emsdk/blob/82ad00499a42abde16b363239d2bc83bf5d863ab/bazel/emscripten_toolchain/wasm_cc_binary.bzl#L91
	cc_target = ":canvaskit.build",
	)

	bool_flag(
	name = "enable_canvas_polyfill",
	default = False,
	)

	bool_flag(
	name = "enable_fonts",
	default = False,
	)

	bool_flag(
	name = "include_embedded_font",
	default = False,
	)

	bool_flag(
	name = "include_matrix_js",
	default = False,
	)

	bool_flag(
	name = "enable_skottie",
	default = False,
	)

	bool_flag(
	name = "enable_skp_serialization",
	default = False,
	)

	bool_flag(
	name = "enable_particles",
	default = False,
	)

	bool_flag(
	name = "enable_runtime_effect",
	default = False,
	)

	karma_test(
	name = "canvaskit_js_tests",
	srcs = [
	":canvaskit/canvaskit.js",
	# We want to make sure the CanvasKit JS is loaded before the loader script
	"tests/bazel/canvaskitinit.js",
	"tests/bazel/util.js",
	"tests/bazel/test_reporter.js",
	# which is loaded before the tests...
	"tests/bazel/smoke_test.js",
	"tests/bazel/canvas_test.js",
	"tests/bazel/canvas2d_test.js",
	"tests/bazel/core_test.js",
	"tests/bazel/font_test.js",
	"tests/bazel/matrix_test.js",
	"tests/bazel/paragraph_test.js",
	"tests/bazel/path_test.js",
	"tests/bazel/rtshader_test.js",
	"tests/bazel/skottie_test.js",
	],
	config_file = "karma.bazel.js",
	# The tests need the Gold server to be up and running so they can make POST requests to
	# exfiltrate the PNGs they create.
	env = "//modules/canvaskit/go/gold_test_env:gold_test_env",
	static_files = [
	":canvaskit/canvaskit.wasm",
	"//modules/canvaskit/tests/assets:test_assets",
	],
	)