Gacela as Guile modules.

[gacela.git] / src / video.scm

diff --git a/src/video.scm b/src/video.scm
index fbd98b7f0e94db994ce8683cdfdd342f91dac147..e0aa94ffa561ab62865661c5de8e2abef6ba0670 100644 (file)
--- a/src/video.scm
+++ b/src/video.scm
@@ -19,6 +19,7 @@
   #: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 (init-video
@@ -32,6 +33,10 @@
            set-2d-mode
            set-3d-mode
            3d-mode?
+           set-frames-per-second
+           init-frame-time
+           get-frame-time
+           delay-frame
            get-current-color
            set-current-color
            with-color
@@ -155,6 +160,33 @@
   (glLoadIdentity))
 
 
+;;; Frames per second
+
+(define set-frames-per-second #f)
+(define init-frame-time #f)
+(define get-frame-time #f)
+(define delay-frame #f)
+
+(let ((time 0) (time-per-frame (/ 1000.0 *frames-per-second*)))
+  (set! set-frames-per-second
+       (lambda (fps)
+         (set! time-per-frame (/ 1000.0 fps))))
+
+  (set! init-frame-time
+       (lambda ()
+         (set! time (SDL_GetTicks))))
+
+  (set! get-frame-time
+       (lambda ()
+         time))
+
+  (set! delay-frame
+       (lambda ()
+         (let ((frame-time (- (SDL_GetTicks) time)))
+           (cond ((< frame-time time-per-frame)
+                  (SDL_Delay (- time-per-frame frame-time))))))))
+
+
 ;;; Drawing
 
 (define get-current-color #f)
@@ -238,27 +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)))))))))
+  (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
@@ -371,11 +398,7 @@
 ;;; 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))