figl/gl/types.scm

   1 ;;; figl
   2 ;;; Copyright (C) 2013 Daniel Hartwig <mandyke@gmail.com>
   3 ;;;
   4 ;;; Figl is free software: you can redistribute it and/or modify it
   5 ;;; under the terms of the GNU Lesser General Public License as
   6 ;;; published by the Free Software Foundation, either version 3 of the
   7 ;;; License, or (at your option) any later version.
   8 ;;;
   9 ;;; Figl is distributed in the hope that it will be useful, but WITHOUT
  10 ;;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 ;;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
  12 ;;; Public License for more details.
  13 ;;;
  14 ;;; You should have received a copy of the GNU Lesser General Public
  15 ;;; License along with this program.  If not, see
  16 ;;; <http://www.gnu.org/licenses/>.
  17
  18 ;;; Commentary:
  19 ;;
  20 ;; Mappings from OpenGL to FFI types.
  21 ;;
  22 ;;; Code:
  23
  24 (define-module (figl gl types)
  25   #:use-module (figl runtime)
  26   #:use-module (rnrs bytevectors)
  27   #:use-module ((system foreign) #:renamer (symbol-prefix-proc 'ffi:))
  28   #:export (void
  29             GLboolean
  30             GLbyte
  31             GLubyte
  32             GLchar
  33             GLshort
  34             GLushort
  35             GLint
  36             GLuint
  37             GLsizei
  38             GLenum
  39             GLintptr
  40             GLsizeiptr
  41             GLbitfield
  42             GLfloat
  43             GLclampf
  44             GLdouble
  45             GLclampd
  46
  47             GLboolean-*
  48             GLchar-*
  49             GLdouble-*
  50             GLenum-*
  51             GLfloat-*
  52             GLint-*
  53             GLsizei-*
  54             GLubyte-*
  55             GLuint-*
  56             GLvoid-*
  57             const-GLchar-*
  58             const-GLchar-**
  59             const-GLclampf-*
  60             const-GLdouble-*
  61             const-GLenum-*
  62             const-GLfloat-*
  63             const-GLint-*
  64             const-GLsizei-*
  65             const-GLubyte*
  66             const-GLubyte-*
  67             const-GLubyte-*
  68             const-GLuint-*
  69             const-GLvoid-*
  70             const-GLvoid-**
  71             void-*))
  72
  73 (define %ptr
  74   (case (ffi:sizeof '*)
  75     ((4) ffi:uint32)
  76     ((8) ffi:uint64)
  77     (else (error "unknown pointer size"))))
  78
  79 (define-simple-foreign-type void ffi:void)
  80 (define-simple-foreign-type GLboolean ffi:uint8)
  81 (define-simple-foreign-type GLbyte ffi:int8)
  82 (define-simple-foreign-type GLubyte ffi:uint8)
  83 (define-simple-foreign-type GLchar ffi:int8)
  84 (define-simple-foreign-type Glshort ffi:int16)
  85 (define-simple-foreign-type GLushort ffi:uint16)
  86 (define-simple-foreign-type GLint ffi:int32)
  87 (define-simple-foreign-type GLuint ffi:uint32)
  88 (define-simple-foreign-type GLsizei ffi:int32)
  89 (define-simple-foreign-type GLenum ffi:uint32)
  90 (define-simple-foreign-type GLintptr %ptr)
  91 (define-simple-foreign-type GLsizeiptr %ptr)
  92 (define-simple-foreign-type GLbitfield ffi:uint32)
  93 (define-simple-foreign-type GLfloat ffi:float)
  94 (define-simple-foreign-type GLclampf ffi:float)
  95 (define-simple-foreign-type GLdouble ffi:double)
  96 (define-simple-foreign-type GLclampd ffi:double)
  97 (define-simple-foreign-type GLvoid-* '*)
  98 (define-simple-foreign-type void-* '*)
  99 (define-simple-foreign-type const-GLvoid-* '*)
 100
 101 (define (array->pointer x)
 102   (lambda (x)
 103     (if x
 104         (ffi:bytevector->pointer x)
 105         ffi:%null-pointer)))
 106
 107 (define-syntax define-array-foreign-type
 108   (syntax-rules ()
 109     ((_ name element-type)
 110      (define-foreign-type name '*
 111        array->pointer
 112        (lambda (x) x)))))
 113
 114 (define-array-foreign-type GLboolean-* GLboolean)
 115 (define-array-foreign-type GLchar-* GLchar)
 116 (define-array-foreign-type GLdouble-* GLdouble)
 117 (define-array-foreign-type GLenum-* GLenum)
 118 (define-array-foreign-type GLfloat-* GLfloat)
 119 (define-array-foreign-type GLint-* GLint)
 120 (define-array-foreign-type GLsizei-* GLsizei)
 121 (define-array-foreign-type GLubyte-* GLubyte)
 122 (define-array-foreign-type GLuint-* GLuint)
 123
 124 (define-array-foreign-type const-GLclampf-* GLclampf)
 125 (define-array-foreign-type const-GLdouble-* GLdouble)
 126 (define-array-foreign-type const-GLenum-* GLenum)
 127 (define-array-foreign-type const-GLfloat-* GLfloat)
 128 (define-array-foreign-type const-GLint-* GLint)
 129 (define-array-foreign-type const-GLsizei-* GLsizei)
 130 (define-array-foreign-type const-GLubyte* GLubyte)
 131 (define-array-foreign-type const-GLubyte-* GLubyte)
 132 (define-array-foreign-type const-GLuint-* GLuint)
 133 (define-array-foreign-type const-GLvoid-* GLvoid)
 134
 135 (define-foreign-type const-GLchar-* '*
 136   ffi:string->pointer
 137   ffi:pointer->string)
 138
 139 ;; Functions with these types will need special help.
 140 (define-simple-foreign-type const-GLchar-** '*)
 141 (define-simple-foreign-type const-GLvoid-** '*)