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|
;;;;
;;;; SDL and OpenGL bindings tests
;;;; =============================
;;;;
;;;; written in 2002 by Timo Tossavainen (tt@cs.uta.fi)
;;;;
;;;; TODO: write a real test suite
;; Uncomment the following line if you get floating point errors
;; (my old machine Cel300A@450 got divide by zero errors with Riva TNT)
;; Set float traps equal to default C settings on X86. Uncommenting will cause
;; problems in Lisp error handling (i.e. will not catch all float errors).
; #+X86(set-floating-point-modes :traps '(:invalid) :precision-control :64-bit)
;(require :gl)
;(require :sdl)
(defpackage #:sdl-test
(:use #:common-lisp)
(:export #:start))
(in-package #:sdl-test)
;; Initialization of SDL and GL to sensible values
(defun init-sdl-with-gl ()
(sdl:init sdl:+init-video+)
(sdl:set-gl-attributes :red-size 4 :blue-size 4 :green-size 4
:doublebuffer 1 :depth-size 16)
(let ((surface (sdl:set-video-mode 640 480 16 (logior sdl:+opengl+
sdl:+resizable+))))
(format t "GL Rendering Context Bit Depths Obtained:~%")
(multiple-value-bind (s r) (sdl:gl-get-attribute sdl:+gl-red-size+)
(format t "RED: ~A ~A~%" s r))
(multiple-value-bind (s g) (sdl:gl-get-attribute sdl:+gl-green-size+)
(format t "GREEN: ~A ~A~%" s g))
(multiple-value-bind (s b) (sdl:gl-get-attribute sdl:+gl-blue-size+)
(format t "BLUE: ~A ~A~%" s b))
(multiple-value-bind (s d) (sdl:gl-get-attribute sdl:+gl-doublebuffer+)
(format t "DOUBLEBUFFER: ~A ~A~%" s (when d 'yes)))
(sdl:wm-set-caption "SDL and GL Event Test" nil)
(gl:viewport 0 0 640 480)
(gl:matrix-mode gl:+projection+)
(gl:load-identity)
(gl:frustum (/ -640.0d0 480.0d0) (/ 640.0d0 480.0d0)
1.0d0 -1.0d0 0.0d0 20.0d0)
surface))
;; The following arrays are used to test vertex and color arrays
(declaim (type (simple-array single-float) *vertex* *color*)
(single-float *angle*))
(defvar *vertex*
(make-array 15 :element-type 'single-float
:initial-contents '( 0.0f0 0.0f0 1.0f0
0.5f0 0.0f0 0.0f0
-0.35f0 -0.35f0 0.0f0
-0.35f0 0.35f0 0.0f0
0.0f0 0.0f0 -1.0f0 )))
(defvar *color*
(make-array 15
:element-type 'single-float
:initial-contents '(1.0f0 1.0f0 1.0f0
1.0f0 0.0f0 0.0f0
0.0f0 1.0f0 0.0f0
0.0f0 0.0f0 1.0f0
0.0f0 0.0f0 0.0f0)))
(defvar *angle* 0.0f0)
;; Update and draw the scene (a rotating smoothly colored triangle)
(defun update-gl ()
(declare (optimize speed (safety 1)))
(gl:clear-color 0.0f0 0.0f0 0.0f0 1.0f0)
(gl:clear gl:+color-buffer-bit+)
(gl:matrix-mode gl:+modelview+)
(gl:load-identity)
(gl:translate-f 0.0f0 -0.5f0 0.5f0)
(gl:begin gl:+triangles+)
(gl:color-3f 1.0f0 0.0f0 0.0f0)
(gl:vertex-2f -0.5f0 0.0f0)
(gl:color-3f 0.0f0 1.0f0 0.0f0)
(gl:vertex-2f 0.0f0 1.0f0)
(gl:color-3f 0.0f0 0.0f0 1.0f0)
(gl:vertex-2f 0.5f0 0.0f0)
(gl:end)
(sdl:gl-swap-buffers))
#+nil
(defun update-gl ()
; (declare (optimize speed (safety 0)))
(incf *angle* 2.0f0)
(when (> *angle* 360.0f0)
(decf *angle* 360.0f0))
(gl:clear-color 0.0f0 0.0f0 0.0f0 1.0f0)
(gl:clear gl:+color-buffer-bit+)
(gl:matrix-mode gl:+modelview+)
(gl:disable gl:+depth-test+)
(gl:disable gl:+cull-face+)
(gl:load-identity)
(gl:with-vertex-array (*vertex* :type single-float :size 3)
(gl:enable-client-state gl:+color-array+)
(gl:color-pointer 3 gl:+float+ 0 (aref-sap *color* 0))
(gl:translate-f 0.0f0 0.0f0 -1.1f0)
(gl:rotate-f *angle* 1.0f0 1.0f0 0.0f0)
(gl:begin gl:+triangles+)
(gl:vertex-3f 1.0f0 0.0f0 0.0f0)
(gl:vertex-3f 0.0f0 1.0f0 0.0f0)
(gl:vertex-3f -1.0f0 0.0f0 0.0f0)
(gl:array-element 1)
(gl:array-element 2)
(gl:array-element 0)
(gl:array-element 2)
(gl:array-element 3)
(gl:array-element 0)
(gl:array-element 3)
(gl:array-element 4)
(gl:array-element 0)
(gl:array-element 2)
(gl:array-element 1)
(gl:array-element 5)
(gl:array-element 3)
(gl:array-element 2)
(gl:array-element 5)
(gl:array-element 4)
(gl:array-element 3)
(gl:array-element 5)
(gl:end)
(gl:disable-client-state gl:+color-array+))
(sdl:gl-swap-buffers))
;; The main SDL event loop (elegant, ain't it ?... just kidding)
(defun run-sdl-event-loop ()
(sdl:event-loop
(:key-down (key)
(when (= key (char-code #\q))
(return)))
(:mouse-button-up (button x y)
(format t "Mouse button up: ~A (~A, ~A)~%" button x y))
(:mouse-button-down (button x y)
(format t "Mouse button dn: ~A (~A, ~A)~%" button x y))
(:quit ()
(return))
(:resize (width height)
(format t "Resized width = ~A height = ~A~%" width height))
(:idle ()
(update-gl))))
;; The main program to test SDL event handling and GL graphics
(defun test-sdl-events ()
(unwind-protect
(progn
(init-sdl-with-gl)
(format t "OpenGL Information~%------------------~%Vendor: ~A~%Version: ~A~%Renderer: ~A~%Extensions: ~A~%"
(gl:get-string gl:+vendor+)
(gl:get-string gl:+renderer+)
(gl:get-string gl:+version+)
(gl:get-string gl:+extensions+))
(run-sdl-event-loop))
(sdl:quit)))
(defun start ()
(test-sdl-events))
|
