;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 Rutger Helling <rhelling@mykolab.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages vulkan)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix build-system cmake)
  #:use-module (gnu packages)
  #:use-module (gnu packages bison)
  #:use-module (gnu packages freedesktop)
  #:use-module (gnu packages gl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages xorg))

(define-public spirv-headers
  (let ((commit "98b01515724c428d0f0a5d01deffcce0f5f5e61c")
        (revision "1"))
    (package
     (name "spirv-headers")
     (version (string-append "0.0-" revision "." (string-take commit 9)))
     (source
      (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/KhronosGroup/SPIRV-Headers")
             (commit commit)))
       (sha256
        (base32
         "15bknwkv3xwmjs3lmkp282a1wrp0da1b4lp45i4yiav04zmqygj2"))
       (file-name (string-append name "-" version "-checkout"))))
     (build-system cmake-build-system)
     (arguments
      `(#:tests? #f ;; No tests
        #:phases (modify-phases %standard-phases
                   (replace 'install
                     (lambda*
                       (#:key outputs #:allow-other-keys)
                         (system* "cmake" "-E" "copy_directory"
                                  "../source/include/spirv" (string-append
                                  (assoc-ref outputs "out")
                                  "/include/spirv")))))))
     (home-page "https://github.com/KhronosGroup/SPIRV-Headers")
     (synopsis "Machine-readable files from the SPIR-V Registry")
     (description "SPIRV-Headers is a repository containing machine-readable
files from the SPIR-V Registry.")
     (license license:x11-style)))) ;; Custom license. See
     ;; https://github.com/KhronosGroup/SPIRV-Headers/blob/master/LICENSE for
     ;; details.

(define-public spirv-tools
  (package
   (name "spirv-tools")
   (version "2017.1")
   (source
    (origin
     (method url-fetch)
     (uri (string-append "https://github.com/KhronosGroup/SPIRV-Tools/archive/v"
           version ".tar.gz"))
     (sha256
      (base32
       "009vflaa71a7xhvmm23f4sdbcgdkl1k4facqkwsg6djha2sdpsqq"))
     (file-name (string-append name "-" version ".tar.gz"))))
   (build-system cmake-build-system)
   (arguments
    `(#:configure-flags (list (string-append "-DCMAKE_INSTALL_LIBDIR="
                                             (assoc-ref %outputs "out")
                                             "/lib")
                              (string-append "-DSPIRV-Headers_SOURCE_DIR="
                                             (assoc-ref %build-inputs
                                                        "spirv-headers")))))
   (inputs `(("python" ,python)
             ("spirv-headers" ,spirv-headers)))
   (native-inputs `(("pkg-config", pkg-config)))
   (home-page "https://github.com/KhronosGroup/SPIRV-Tools")
   (synopsis "API and commands for processing SPIR-V modules")
   (description "The SPIR-V Tools project provides an API and commands for
processing SPIR-V modules.")
   (license license:asl2.0)))

(define-public glslang
  ;; Version 3.0 is too old for vulkan-icd-loader. Use a recent git commit
  ;; until the next stable version.
  (let ((commit "471bfed0621162a7513fc24a51e8a1ccc2e640ff")
        (revision "1"))
    (package
     (name "glslang")
     (version (string-append "0.0-" revision "." (string-take commit 9)))
     (source
      (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/KhronosGroup/glslang")
             (commit commit)))
       (sha256
        (base32
         "0m2vljmrqppp80ghbbwfnayqw2canxlcjhgy6jw9xjdssln0d3pd"))
       (file-name (string-append name "-" version "-checkout"))))
     (build-system cmake-build-system)
     (arguments
      `(#:tests? #f ;; No tests
        ;; glslang tries to set CMAKE_INSTALL_PREFIX manually. Remove the
        ;; offending line.
        #:phases (modify-phases %standard-phases
                   (add-after 'patch-source-shebangs 'fix-cmakelists
                     (lambda _
                       (substitute* "CMakeLists.txt"
                                    (("set.*CMAKE_INSTALL_PREFIX.*") "")))))))
   (inputs `(("bison" ,bison)))
   (native-inputs `(("pkg-config" ,pkg-config)))
   (home-page "https://github.com/KhronosGroup/glslang")
   (synopsis "OpenGL and OpenGL ES shader front end and validator")
   (description "glslang is a OpenGL and OpenGL ES shader front end and
validator.")
   ;; Modified BSD license. See "copyright" section of
   ;; https://www.khronos.org/opengles/sdk/tools/Reference-Compiler/
   (license license:bsd-3))))

(define-public vulkan-icd-loader
  (package
   (name "vulkan-icd-loader")
   (version "1.0.61.1")
   (source
    (origin
     (method url-fetch)
     (uri (string-append
           "https://github.com/KhronosGroup/Vulkan-LoaderAndValidationLayers/"
           "archive/sdk-" version ".tar.gz"))
     (sha256
      (base32
       "05g60hk30sbc4rwkh7nrgqdk6hfsi4hwxs54yrysrzr18xpfb8j7"))))
   (build-system cmake-build-system)
   (arguments
    `(#:tests? #f ;; No tests
      #:configure-flags (list (string-append "-DCMAKE_INSTALL_LIBDIR="
                                (assoc-ref %outputs "out") "/lib"))))
   (inputs `(("glslang" ,glslang)
             ("libxcb" ,libxcb)
             ("libx11" ,libx11)
             ("libxrandr" ,libxrandr)
             ("mesa" ,mesa)
             ("python" ,python)
             ("spirv-tools" ,spirv-tools)
             ("wayland" ,wayland)))
   (native-inputs `(("pkg-config", pkg-config)))
   (home-page (string-append "https://github.com/"
              "KhronosGroup/Vulkan-LoaderAndValidationLayers"))
   (synopsis "Khronos official ICD loader for Vulkan")
   (description "Vulkan-ICD-Loader provides Khronos official ICD loader and
validation layers for Vulkan developers on GNU/Linux.")
   (license license:asl2.0)))