media-libs/shaderc: new package

A collection of tools, libraries and tests for shader compilation.
Includes, for example, a GLSL -> SPIR-V compiler as a shared library,
which is required for the upcoming Vulkan support in media-video/mpv.

Package-Manager: Portage-2.3.40, Repoman-2.3.9

media-libs/shaderc/Manifest

@@ -0,0 +1 @@
+DIST shaderc-7a23a01742b88329fb2260eda007172135ba25d4.tar.gz 186291 BLAKE2B e91f57ba5c9339fed17d409b82df284a7897ed8bcabb203a0b8aab439df1d460ff5efdaa49e9140801b1430e831bbdca6920181fd1ddd07d8d35eb17b519246b SHA512 558447bc29b0c7610fda0f6c2a6b66f3c8fc7f2f5e336ad190ae959caa8c7aa1e09d3c2efe0e197cb2cbe1fa97e0c68623ce423c658b29fcbd1f1e1ea4c85f18

media-libs/shaderc/files/shaderc-2017.2-fix-glslang-link-order.patch

@@ -0,0 +1,46 @@
+Original upstream PR: https://github.com/google/shaderc/pull/463
+
+From 21c8be385b3fab5edcb934a6d99f69fd389c4e67 Mon Sep 17 00:00:00 2001
+From: Niklas Haas <[email protected]>
+Date: Tue, 29 May 2018 07:34:00 +0200
+Subject: [PATCH] Fix the link order of libglslang and libHLSL
+
+libglslang depends on libHLSL, so the latter needs to be specified last.
+This fixes an issue when trying to build shaderc against system-wide
+versions of libglslang/libHLSL, rather than the in-tree versions from
+third_party.
+
+Additionally, libshaderc_util also depends on SPIRV-Tools
+---
+ glslc/CMakeLists.txt           | 2 +-
+ libshaderc_util/CMakeLists.txt | 4 ++--
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/glslc/CMakeLists.txt b/glslc/CMakeLists.txt
+index acf6fb0..0f5d888 100644
+--- a/glslc/CMakeLists.txt
++++ b/glslc/CMakeLists.txt
+@@ -18,7 +18,7 @@ add_library(glslc STATIC
+ shaderc_default_compile_options(glslc)
+ target_include_directories(glslc PUBLIC ${glslang_SOURCE_DIR})
+ target_link_libraries(glslc PRIVATE glslang OSDependent OGLCompiler
+-  HLSL glslang SPIRV ${CMAKE_THREAD_LIBS_INIT})
++  glslang SPIRV HLSL ${CMAKE_THREAD_LIBS_INIT})
+ target_link_libraries(glslc PRIVATE shaderc_util shaderc)
+
+ add_executable(glslc_exe src/main.cc)
+diff --git a/libshaderc_util/CMakeLists.txt b/libshaderc_util/CMakeLists.txt
+index 873540a..6d0c465 100644
+--- a/libshaderc_util/CMakeLists.txt
++++ b/libshaderc_util/CMakeLists.txt
+@@ -34,8 +34,8 @@ endif(SHADERC_ENABLE_INSTALL)
+
+ find_package(Threads)
+ target_link_libraries(shaderc_util PRIVATE
+-  glslang OSDependent OGLCompiler HLSL glslang SPIRV
+-  SPIRV-Tools-opt ${CMAKE_THREAD_LIBS_INIT})
++  glslang OSDependent OGLCompiler glslang HLSL SPIRV
++  SPIRV-Tools-opt SPIRV-Tools ${CMAKE_THREAD_LIBS_INIT})
+
+ shaderc_add_tests(
+   TEST_PREFIX shaderc_util

media-libs/shaderc/metadata.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>[email protected]</email>
+		<name>Coacher</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>[email protected]</email>
+		<name>Proxy Maintainers</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">google/shaderc</remote-id>
+	</upstream>
+</pkgmetadata>

media-libs/shaderc/shaderc-2017.2.ebuild

@@ -0,0 +1,89 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+EGIT_COMMIT="7a23a01742b88329fb2260eda007172135ba25d4"
+MY_P="${PN}-${EGIT_COMMIT}"
+PYTHON_COMPAT=( python{2_7,3_4,3_5,3_6} )
+
+inherit cmake-multilib python-any-r1
+
+DESCRIPTION="Collection of tools, libraries and tests for shader compilation"
+HOMEPAGE="https://github.com/google/shaderc"
+SRC_URI="https://github.com/google/shaderc/archive/${EGIT_COMMIT}.tar.gz -> ${MY_P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc test"
+
+RDEPEND="
+	dev-util/glslang[${MULTILIB_USEDEP}]
+	dev-util/spirv-tools[${MULTILIB_USEDEP}]
+"
+DEPEND="${RDEPEND}
+	${PYTHON_DEPS}
+	dev-util/spirv-headers
+	doc? ( dev-ruby/asciidoctor )
+	test? (
+		dev-cpp/gtest
+		$(python_gen_any_dep 'dev-python/nose[${PYTHON_USEDEP}]')
+	)
+"
+
+# https://github.com/google/shaderc/issues/470
+RESTRICT=test
+
+PATCHES=( "${FILESDIR}/${P}-fix-glslang-link-order.patch" )
+
+S="${WORKDIR}/${MY_P}"
+
+python_check_deps() {
+	if use test; then
+		has_version --host-root "dev-python/nose[${PYTHON_USEDEP}]"
+	fi
+}
+
+src_prepare() {
+	cmake_comment_add_subdirectory examples
+
+	# Unbundle glslang, spirv-headers, spirv-tools
+	cmake_comment_add_subdirectory third_party
+	sed -i \
+		-e "s|\$<TARGET_FILE:spirv-dis>|${EPREFIX}/usr/bin/spirv-dis|" \
+		glslc/test/CMakeLists.txt || die
+
+	# Disable git versioning
+	sed -i -e '/build-version/d' glslc/CMakeLists.txt || die
+
+	# Manually create build-version.inc as we disabled git versioning
+	cat <<- EOF > glslc/src/build-version.inc || die
+		"${P}\n"
+		"$(best_version dev-util/spirv-tools)\n"
+		"$(best_version dev-util/glslang)\n"
+	EOF
+
+	cmake-utils_src_prepare
+}
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-DSHADERC_SKIP_TESTS="$(usex !test)"
+	)
+	cmake-utils_src_configure
+}
+
+multilib_src_compile() {
+	if multilib_is_native_abi && use doc; then
+		cmake-utils_src_make glslc_doc_README
+	fi
+	cmake-utils_src_compile
+}
+
+multilib_src_install() {
+	if multilib_is_native_abi; then
+		use doc && local HTML_DOCS=( "${BUILD_DIR}/glslc/README.html" )
+	fi
+	cmake-utils_src_install
+}

media-libs/shaderc/shaderc-9999.ebuild

@@ -0,0 +1,85 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+PYTHON_COMPAT=( python{2_7,3_4,3_5,3_6} )
+
+inherit cmake-multilib python-any-r1 git-r3
+
+DESCRIPTION="Collection of tools, libraries and tests for shader compilation"
+HOMEPAGE="https://github.com/google/shaderc"
+EGIT_REPO_URI="https://github.com/google/shaderc.git"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS=""
+IUSE="doc test"
+
+RDEPEND="
+	~dev-util/glslang-9999[${MULTILIB_USEDEP}]
+	~dev-util/spirv-tools-9999[${MULTILIB_USEDEP}]
+"
+DEPEND="${RDEPEND}
+	${PYTHON_DEPS}
+	~dev-util/spirv-headers-9999
+	doc? ( dev-ruby/asciidoctor )
+	test? (
+		dev-cpp/gtest
+		$(python_gen_any_dep 'dev-python/nose[${PYTHON_USEDEP}]')
+	)
+"
+
+# https://github.com/google/shaderc/issues/470
+RESTRICT=test
+
+PATCHES=( "${FILESDIR}/${PN}-2017.2-fix-glslang-link-order.patch" )
+
+python_check_deps() {
+	if use test; then
+		has_version --host-root "dev-python/nose[${PYTHON_USEDEP}]"
+	fi
+}
+
+src_prepare() {
+	cmake_comment_add_subdirectory examples
+
+	# Unbundle glslang, spirv-headers, spirv-tools
+	cmake_comment_add_subdirectory third_party
+	sed -i \
+		-e "s|\$<TARGET_FILE:spirv-dis>|${EPREFIX}/usr/bin/spirv-dis|" \
+		glslc/test/CMakeLists.txt || die
+
+	# Disable git versioning
+	sed -i -e '/build-version/d' glslc/CMakeLists.txt || die
+
+	# Manually create build-version.inc as we disabled git versioning
+	cat <<- EOF > glslc/src/build-version.inc || die
+		"${P}\n"
+		"$(best_version dev-util/spirv-tools)\n"
+		"$(best_version dev-util/glslang)\n"
+	EOF
+
+	cmake-utils_src_prepare
+}
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-DSHADERC_SKIP_TESTS="$(usex !test)"
+	)
+	cmake-utils_src_configure
+}
+
+multilib_src_compile() {
+	if multilib_is_native_abi && use doc; then
+		cmake-utils_src_make glslc_doc_README
+	fi
+	cmake-utils_src_compile
+}
+
+multilib_src_install() {
+	if multilib_is_native_abi; then
+		use doc && local HTML_DOCS=( "${BUILD_DIR}/glslc/README.html" )
+	fi
+	cmake-utils_src_install
+}