X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=src%2Fvideo.scm;h=e183f13330f05713125651b2063ea9ff83fabf39;hb=995c7af364cfdc254e904a3b560e068339613534;hp=1b2a9e73a588eb2c3fbc1eab0b9a5012edede6eb;hpb=3c8d1a6786c9ccc88fff5c1d381f5f4a9b333c72;p=gacela.git diff --git a/src/video.scm b/src/video.scm index 1b2a9e7..e183f13 100644 --- a/src/video.scm +++ b/src/video.scm @@ -19,13 +19,33 @@ #:use-module (gacela sdl) #:use-module (gacela gl) #:use-module (gacela ftgl) + #:use-module (gacela math) #:use-module (ice-9 optargs) #:use-module (ice-9 receive) - #:export (with-color + #:export (init-video + get-screen-height + get-screen-width + get-screen-bpp + set-screen-bpp! + resize-screen + quit-video + clear-screen + flip-screen + set-screen-title! + get-screen-title + set-2d-mode + set-3d-mode + 3d-mode? + get-frames-per-second + set-frames-per-second! + init-frame-time + get-frame-time + delay-frame + get-current-color + set-current-color + with-color progn-textures draw - load-image - resize-surface load-texture draw-texture draw-line @@ -33,28 +53,154 @@ draw-rectangle draw-square draw-cube - add-light translate rotate to-origin + add-light set-camera camera-look load-font - render-text)) + render-text) + #:export-syntax (glmatrix-block) + #:re-export (glPushMatrix + glPopMatrix)) + + + +;;; Screen + +(define screen #f) +(define flags 0) + +(define* (init-video width height bpp #:key (mode '2d) (title "") (fps 20)) + (cond ((not screen) + (SDL_Init SDL_INIT_VIDEO) + (let ((info (SDL_GetVideoInfo))) + (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1) + (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE + (if (= (assoc-ref info 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE) + (if (= (assoc-ref info 'blit_hw) 0) 0 SDL_HWACCEL))) + (set! screen (SDL_SetVideoMode width height bpp flags)) + (set-screen-title! title) + (set-frames-per-second! fps) + (init-gl) + (if (eq? mode '3d) (set-3d-mode) (set-2d-mode)))))) + +(define (get-screen-height) + (surface-h screen)) + +(define (get-screen-width) + (surface-w screen)) + +(define (get-screen-bpp) + (* (surface-format-BytesPerPixel screen) 8)) + +(define (set-screen-bpp! bpp) + (cond (screen + (set! screen (SDL_SetVideoMode (get-screen-width) (get-screen-height) bpp flags))))) + +(define (resize-screen width height) + (cond (screen + (set! screen (SDL_SetVideoMode width height (get-screen-bpp) flags)) + (resize-screen-GL width height)))) + +(define (quit-video) + (cond (screen + (SDL_FreeSurface screen) + (set! screen #f) + (SDL_Quit)))) +(define (clear-screen) + (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))) -(define get-current-color #f) -(define set-current-color #f) +(define (flip-screen) + (SDL_GL_SwapBuffers)) -(let ((current-color '(1 1 1 1))) - (set! get-current-color - (lambda () - current-color)) - (set! set-current-color - (lambda* (red green blue #:optional (alpha 1)) - (set! current-color (list red green blue alpha)) - (glColor4f red green blue alpha)))) +(define screen-title "") + +(define (set-screen-title! title) + (set! screen-title title) + (SDL_WM_SetCaption title "")) + +(define (get-screen-title) + screen-title) + + +(define mode '2d) + +(define (set-2d-mode) + (set! mode '2d) + (glDisable GL_DEPTH_TEST) + (resize-screen-GL (get-screen-width) (get-screen-height))) + +(define (set-3d-mode) + (set! mode '3d) + (glClearDepth 1) + (glEnable GL_DEPTH_TEST) + (glDepthFunc GL_LEQUAL) + (resize-screen-GL (get-screen-width) (get-screen-height))) + +(define (3d-mode?) + (eq? mode '3d)) + + +(define (init-gl) + (glShadeModel GL_SMOOTH) + (glClearColor 0 0 0 0) + (glEnable GL_BLEND) + (glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA) + (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST)) + +(define (resize-screen-GL width height) + (glViewport 0 0 width height) + (glMatrixMode GL_PROJECTION) + (glLoadIdentity) + (cond ((3d-mode?) + (let ((ratio (if (= height 0) width (/ width height)))) + (gluPerspective 45 ratio 0.1 100))) + (else + (let* ((w (/ width 2)) (h (/ height 2))) + (glOrtho (- w) w (- h) h 0 1)))) + (glMatrixMode GL_MODELVIEW) + (glLoadIdentity)) + + +;;; Frames per second + +(define time 0) +(define frames-per-second 20) +(define time-per-frame 50) ;in ms + +(define (get-frames-per-second) + frames-per-second) + +(define (set-frames-per-second! fps) + (set! frames-per-second fps) + (set! time-per-frame (/ 1000.0 fps))) + +(define (init-frame-time) + (set! time (SDL_GetTicks))) + +(define (get-frame-time) + time) + +(define (delay-frame) + (let ((frame-time (- (SDL_GetTicks) time))) + (cond ((< frame-time time-per-frame) + (SDL_Delay (- time-per-frame frame-time)))))) + + +;;; Drawing + +(define current-color '(1 1 1 1)) + +(define (get-current-color) + current-color) + +(define* (set-current-color red green blue #:optional (alpha 1)) + (set! current-color (list red green blue alpha)) + (glColor4f red green blue alpha)) (define-macro (with-color color . code) (cond (color @@ -106,7 +252,6 @@ (SDL_DisplayFormatAlpha image))))) (define (load-image-for-texture filename) - (init-sdl) (let ((image (load-image filename))) (cond (image (let* ((width (surface-w image)) (height (surface-h image)) @@ -125,31 +270,22 @@ (zoomSurface surface zoomx zoomy 0)))))) (define* (load-texture filename #:key (min-filter GL_LINEAR) (mag-filter GL_LINEAR)) - (let* ((key (list filename min-filter mag-filter)) - (res (get-resource-from-cache key))) - (cond (res res) - (else - (progn-textures - (receive - (image real-w real-h) (load-image-for-texture filename) - (cond (image - (let ((width (surface-w image)) (height (surface-h image)) - (byteorder (if (= SDL_BYTEORDER SDL_LIL_ENDIAN) - (if (= (surface-format-BytesPerPixel image) 3) GL_BGR GL_BGRA) - (if (= (surface-format-BytesPerPixel image) 3) GL_RGB GL_RGBA))) - (texture (car (glGenTextures 1)))) - - (glBindTexture GL_TEXTURE_2D texture) - (glTexImage2D GL_TEXTURE_2D 0 4 width height 0 byteorder GL_UNSIGNED_BYTE (surface-pixels image)) - (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER min-filter) - (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER mag-filter) - (set-texture-size! texture real-w real-h) - (insert-resource-into-cache key texture) - texture))))))))) - -;; (define* (draw-image filename #:optional (zoom 1)) -;; (let ((texture (load-texture filename))) -;; (cond (texture (draw-texture texture zoom))))) + (progn-textures + (receive + (image real-w real-h) (load-image-for-texture filename) + (cond (image + (let ((width (surface-w image)) (height (surface-h image)) + (byteorder (if (= SDL_BYTEORDER SDL_LIL_ENDIAN) + (if (= (surface-format-BytesPerPixel image) 3) GL_BGR GL_BGRA) + (if (= (surface-format-BytesPerPixel image) 3) GL_RGB GL_RGBA))) + (texture (car (glGenTextures 1)))) + + (glBindTexture GL_TEXTURE_2D texture) + (glTexImage2D GL_TEXTURE_2D 0 4 width height 0 byteorder GL_UNSIGNED_BYTE (surface-pixels image)) + (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER min-filter) + (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER mag-filter) + (set-texture-size! texture real-w real-h) + texture)))))) (define* (draw-texture texture #:optional (zoom 1)) (cond (texture @@ -203,26 +339,20 @@ (glNormal3f 0 1 0) (draw-quad (list size size size) (list -size size size) (list -size size -size) (list size size -size) #:texture (or texture-3 texture) #:color (or color-3 color)) (glNormal3f 0 -1 0) - (draw-quad (list -size -size size) (list size -size size) (list size -size -size) (list -size -size -size) :texture (or texture-4 texture) #:color (or color-4 color)) + (draw-quad (list -size -size size) (list size -size size) (list size -size -size) (list -size -size -size) #:texture (or texture-4 texture) #:color (or color-4 color)) (glNormal3f 1 0 0) - (draw-quad (list size -size -size) (list size -size size) (list size size size) (list size size -size) :texture (or texture-5 texture) #:color (or color-5 color)) + (draw-quad (list size -size -size) (list size -size size) (list size size size) (list size size -size) #:texture (or texture-5 texture) #:color (or color-5 color)) (glNormal3f -1 0 0) - (draw-quad (list -size -size size) (list -size -size -size) (list -size size -size) (list -size size size) :texture (or texture-6 texture) #:color (or color-6 color))))) - -(define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t)) - (init-lighting) - (and light (glLightfv id GL_DIFFUSE (first light) (second light) (third light) (fourth light))) - (and light position (glLightfv GL_POSITION (first position) (second position) (third position) (fourth position))) - (and ambient (glLightfv id GL_AMBIENT (first ambient) (second ambient) (third ambient) (fourth ambient))) - (and turn-on (glEnable id)) - id) + (draw-quad (list -size -size size) (list -size -size -size) (list -size size -size) (list -size size size) #:texture (or texture-6 texture) #:color (or color-6 color))))) (define* (translate x y #:optional (z 0)) (glTranslatef x y z)) (define* (rotate #:rest rot) - (cond ((3d-mode?) (apply 3d-rotate rot)) - (else (apply 2d-rotate rot)))) + (cond ((3d-mode?) + (apply 3d-rotate rot)) + (else + (apply 2d-rotate rot)))) (define (3d-rotate xrot yrot zrot) (glRotatef xrot 1 0 0) @@ -236,29 +366,44 @@ (glLoadIdentity) (cond ((3d-mode?) (camera-look)))) -(define set-camera #f) -(define camera-look #f) +(define-macro (glmatrix-block . code) + `(let ((result #f)) + (glPushMatrix) + (set! result (begin ,@code)) + (glPopMatrix) + result)) + + +;;; Lights + +;; (define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t)) +;; (init-lighting) +;; (and light (glLightfv id GL_DIFFUSE (car light) (cadr light) (caddr light) (cadddr light))) +;; (and light position (glLightfv GL_POSITION (car position) (cadr position) (caddr position) (cadddr position))) +;; (and ambient (glLightfv id GL_AMBIENT (car ambient) (cadr ambient) (caddr ambient) (cadddr ambient))) +;; (and turn-on (glEnable id)) +;; id) + + +;;; Camera + +(define camera-eye '(0 0 0)) +(define camera-center '(0 0 -100)) +(define camera-up '(0 1 0)) -(let ((camera-eye '(0 0 0)) (camera-center '(0 0 -100)) (camera-up '(0 1 0))) - (set! set-camera - (lambda* (#:key eye center up) - (cond (eye (set! camera-eye eye))) - (cond (center (set! camera-center center))) - (cond (up (set! camera-up up))))) +(define* (set-camera #:key eye center up) + (cond (eye (set! camera-eye eye))) + (cond (center (set! camera-center center))) + (cond (up (set! camera-up up)))) - (set! camera-look - (lambda () - (apply gluLookAt (append camera-eye camera-center camera-up))))) +(define (camera-look) + (apply gluLookAt (append camera-eye camera-center camera-up))) ;;; Text and fonts (define* (load-font font-file #:key (size 40) (encoding ft_encoding_unicode)) - (let* ((key (list font-file)) - (font (get-resource-from-cache key))) - (cond ((not font) - (set! font (ftglCreateTextureFont font-file)) - (insert-resource-into-cache key font))) + (let ((font (ftglCreateTextureFont font-file))) (ftglSetFontFaceSize font size 72) (ftglSetFontCharMap font encoding) font))