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;;; guile-2d
;;; Copyright (C) 2013 David Thompson <dthompson2@worcester.edu>
;;;
;;; Guile-2d is free software: you can redistribute it and/or modify it
;;; under the terms of the GNU Lesser General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; Guile-2d 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
;;; Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Quick and dirty wrapper for the FTGL library.
;;
;;; Code:
(define-module (2d wrappers ftgl)
#:use-module (system foreign)
#:use-module (2d wrappers util)
#:use-module (ice-9 format))
(define libftgl (dynamic-link "libftgl"))
(define-syntax-rule (define-foreign name ret string-name args)
(define name
(pointer->procedure ret (dynamic-func string-name libftgl) args)))
;;;
;;; Enums
;;;
(define-enumeration ftgl-render-mode
(front #x0001)
(back #x0002)
(side #x0004)
(all #xffff))
(define-enumeration ftgl-text-alignment
(left 0)
(center 1)
(right 2)
(justify 3))
(export ftgl-render-mode
ftgl-text-alignment)
;;;
;;; Fonts
;;;
(define-wrapped-pointer-type <ftgl-font>
ftgl-font?
wrap-ftgl-font unwrap-ftgl-font
(lambda (r port)
(let ((font (unwrap-ftgl-font r)))
(format port
"<ftgl-font ~x>"
(pointer-address font)))))
(define-foreign %ftgl-create-texture-font
'* "ftglCreateTextureFont" '(*))
(define-foreign %ftgl-set-font-face-size
void "ftglSetFontFaceSize" (list '* unsigned-int unsigned-int))
(define-foreign %ftgl-render-font
void "ftglRenderFont" (list '* '* unsigned-int))
(define-foreign %ftgl-get-font-descender
float "ftglGetFontDescender" '(*))
(define-foreign %ftgl-get-font-ascender
float "ftglGetFontAscender" '(*))
(define (ftgl-create-texture-font filename)
(unless (file-exists? filename)
(throw 'font-not-found filename))
(let ((font (%ftgl-create-texture-font (string->pointer filename))))
(when (null-pointer? font)
(throw 'font-load-failure filename))
(wrap-ftgl-font font)))
(define (ftgl-set-font-face-size font size res)
(%ftgl-set-font-face-size (unwrap-ftgl-font font) size res))
(define (ftgl-render-font font text render-mode)
(%ftgl-render-font (unwrap-ftgl-font font)
(string->pointer text)
render-mode))
(define (ftgl-get-font-descender font)
(%ftgl-get-font-descender (unwrap-ftgl-font font)))
(define (ftgl-get-font-ascender font)
(%ftgl-get-font-ascender (unwrap-ftgl-font font)))
(export ftgl-create-texture-font
ftgl-set-font-face-size
ftgl-render-font
ftgl-get-font-descender
ftgl-get-font-ascender)
;;;
;;; SimpleLayout
;;;
(define-wrapped-pointer-type <ftgl-simple-layout>
ftgl-simple-layout?
wrap-ftgl-simple-layout unwrap-ftgl-simple-layout
(lambda (r port)
(let ((simple-layout (unwrap-ftgl-simple-layout r)))
(format port
"<ftgl-simple-layout ~x>"
(pointer-address simple-layout)))))
(define-foreign %ftgl-create-simple-layout
'* "ftglCreateSimpleLayout" '())
(define-foreign %ftgl-destroy-layout
void "ftglDestroyLayout" '(*))
(define-foreign %ftgl-set-layout-font
void "ftglSetLayoutFont" '(* *))
(define-foreign %ftgl-get-layout-font
'* "ftglGetLayoutFont" '(*))
(define-foreign %ftgl-set-layout-line-length
void "ftglSetLayoutLineLength" (list '* float))
(define-foreign %ftgl-get-layout-line-length
float "ftglGetLayoutLineLength" '(*))
(define-foreign %ftgl-set-layout-alignment
void "ftglSetLayoutAlignment" (list '* int))
(define-foreign %ftgl-get-layout-alignment
int "ftglGetLayoutAlignement" '(*))
(define-foreign %ftgl-set-layout-line-spacing
void "ftglSetLayoutLineSpacing" (list '* float))
;; For some reason this symbol is not found.
;; (define-foreign %ftgl-get-layout-line-spacing
;; float "ftglGetLayoutLineSpacing" '(*))
(define-foreign %ftgl-render-layout
void "ftglRenderLayout" (list '* '* int))
(define (ftgl-create-layout)
(wrap-ftgl-simple-layout
(%ftgl-create-simple-layout)))
(define (ftgl-destroy-layout layout)
(%ftgl-destroy-layout (unwrap-ftgl-simple-layout layout)))
(define (ftgl-set-layout-font layout font)
(%ftgl-set-layout-font (unwrap-ftgl-simple-layout layout)
(unwrap-ftgl-font font)))
(define (ftgl-get-layout-font layout)
(wrap-ftgl-font
(%ftgl-get-layout-font (unwrap-ftgl-simple-layout layout))))
(define (ftgl-set-layout-line-length layout line-length)
(%ftgl-set-layout-line-length (unwrap-ftgl-simple-layout layout)
line-length))
(define (ftgl-get-layout-line-length layout)
(%ftgl-get-layout-line-length (unwrap-ftgl-simple-layout layout)))
(define (ftgl-set-layout-alignment layout alignment)
(%ftgl-set-layout-alignment (unwrap-ftgl-simple-layout layout)
alignment))
(define (ftgl-get-layout-alignment layout)
(%ftgl-get-layout-alignment (unwrap-ftgl-simple-layout layout)))
(define (ftgl-set-layout-line-spacing layout spacing)
(%ftgl-set-layout-line-spacing (unwrap-ftgl-simple-layout layout)
spacing))
(define (ftgl-render-layout layout text mode)
(%ftgl-render-layout (unwrap-ftgl-simple-layout layout)
(string->pointer text)
mode))
(export ftgl-create-layout
ftgl-destroy-layout
ftgl-set-layout-font
ftgl-get-layout-font
ftgl-set-layout-line-length
ftgl-get-layout-line-length
ftgl-set-layout-alignment
ftgl-get-layout-alignment
ftgl-set-layout-line-spacing
ftgl-render-layout)
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