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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.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 toolkits)
#:use-module (gnu packages gl)
#:use-module (gnu packages sdl)
#:use-module ((guix licenses) #:prefix license:)
#:use-module (guix packages)
#:use-module (guix utils)
#:use-module (guix build-system gnu)
#:use-module (guix git-download))
(define-public imgui
(package
(name "imgui")
(version "1.86")
(source (origin
(method git-fetch)
(uri (git-reference
(url "https://github.com/ocornut/imgui")
(commit (string-append "v" version))))
(file-name (git-file-name name version))
(sha256
(base32
"02a7b05zrka20jhzag2jb4jl624i1m456bsv69jb9zgys2p9dv1n"))
(modules '((guix build utils)))
(snippet
'(begin
;; Contains fonts and other unneeded files.
(delete-file-recursively "misc")))))
(outputs '("out" "doc"))
(build-system gnu-build-system)
(arguments
`(#:tests? #f ;no test suite
#:modules ((guix build gnu-build-system)
(guix build utils)
(ice-9 ftw)
(srfi srfi-26))
#:phases
(modify-phases %standard-phases
(add-after 'unpack 'adjust-includes
(lambda _
(substitute* (find-files "." "(\\.cpp|\\.mm)$")
(("#include <SDL")
"#include <SDL2/SDL"))))
(delete 'configure)
(replace 'build
(lambda _
;; Build main library.
(invoke ,(cc-for-target) "-I" (getcwd)
"-g" "-O2" "-fPIC" "-shared"
"-lGL" "-lSDL2" "-lglfw"
"-o" "libimgui.so"
"imgui.cpp"
"imgui_draw.cpp"
;; Include the supported backends.
"backends/imgui_impl_glfw.cpp"
"backends/imgui_impl_sdl.cpp"
"backends/imgui_impl_opengl2.cpp"
"backends/imgui_impl_opengl3.cpp")))
(replace 'install
(lambda* (#:key outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(doc (assoc-ref outputs "doc"))
(header? (cut string-suffix? ".h" <>))
(imgui-headers (scandir "." header?))
(backend-headers (find-files
"backends"
"(glfw|opengl|sdl|vulkan).*\\.h$")))
(install-file "libimgui.so" (string-append out "/lib"))
;; Install headers.
(for-each (lambda (f)
(install-file f (string-append out "/include/imgui")))
imgui-headers)
(for-each (lambda (f)
(install-file f (string-append
out "/include/imgui/backends")))
backend-headers)
;; Install examples.
(copy-recursively
"examples" (string-append
doc "/share/imgui/examples"))))))))
(inputs (list glfw mesa sdl2))
(home-page "https://github.com/ocornut/imgui")
(synopsis "Graphical user interface library for C++")
(description "@code{dear imgui} (also know as ImGui) is a graphical user
interface library for C++. It outputs vertex buffers that can be rendered in
a 3D application. It is fast, renderer agnostic and self-contained.")
(license license:expat)))
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