From f3487d80c29eb9a6ecc23686c5010bffb364af22 Mon Sep 17 00:00:00 2001
From: Javier Sancho <jsf@jsancho.org>
Date: Wed, 28 Sep 2016 17:36:18 +0200
Subject: [PATCH] Images in development

---
 gacela/game.scm  | 17 ++++++++++++++---
 gacela/image.scm | 16 ++++++++++++----
 gacela/scene.scm |  2 +-
 3 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/gacela/game.scm b/gacela/game.scm
index 0b0981d..dad0412 100644
--- a/gacela/game.scm
+++ b/gacela/game.scm
@@ -23,7 +23,8 @@
   #:use-module ((sdl2 video) #:prefix sdl2:)
   #:use-module (gl)
   #:use-module (srfi srfi-11)
-  #:export (run-game-loop))
+  #:export (play-game
+	    %sdl-renderer))
 
 
 ;;; Based on Sly code. Thank you so much!!
@@ -117,8 +118,6 @@ milliseconds of the last iteration of the game loop."
 	  (lambda (signum)
 	    (stop-game-loop)))
 	(set! %root-scene scene)
-	(init-window)
-	(open-window)
 	(game-loop (sdl2:sdl-ticks) 0))
       (lambda (cont callback)
 	(when (procedure? callback)
@@ -129,11 +128,13 @@ milliseconds of the last iteration of the game loop."
   (abort-to-prompt 'game-loop-prompt #f))
 
 (define %sdl-window #f)
+(define %sdl-renderer #f)
 (define %gl-context #f)
 
 (define (init-window)
   (sdl2:sdl-init)
   (set! %sdl-window (sdl2:make-window #:opengl? #t #:show? #t))
+  (set! %sdl-renderer (sdl2:make-renderer %sdl-window))
   (sdl2:set-gl-attribute! 'context-major-version 3)
   (sdl2:set-gl-attribute! 'context-minor-version 2)
   (sdl2:set-gl-attribute! 'double-buffer 1)
@@ -146,3 +147,13 @@ milliseconds of the last iteration of the game loop."
   (sdl2:set-window-size! %sdl-window resolution)
   (sdl2:set-window-fullscreen! %sdl-window fullscreen?)
   (sdl2:show-window! %sdl-window))
+
+(define (close-window)
+  (sdl2:hide-window! %sdl-window)
+  (sdl2:sdl-quit))
+
+(define (play-game scene)
+  (init-window)
+  (open-window)
+  (run-game-loop scene)
+  (close-window))
diff --git a/gacela/image.scm b/gacela/image.scm
index 6a97101..1fdeaf6 100644
--- a/gacela/image.scm
+++ b/gacela/image.scm
@@ -17,18 +17,26 @@
 
 (define-module (gacela image)
   #:use-module (gacela scene)
-  #:use-module ((sdl2 surface) #:prefix sdl2:)
+  #:use-module (gacela game)
+  #:use-module ((sdl2 image) #:prefix sdl2:)
+  #:use-module ((sdl2 render) #:prefix sdl2:)
   #:export (import-bitmap
 	    move-xy))
 
 (define-syntax-rule (import-bitmap filename)
   (make-scene
    "bitmap"
-   (let ((surface (sdl2:load-bmp filename)))
+   (let ((image (sdl2:load-image filename))
+	 (texture #f))
      (let ((a 0))
        (lambda ()
-	 (set! a (+ a 1))
-	 (format #t "Steps: ~a~%" a))))))
+	 (if (not texture)
+	     (set! texture (sdl2:surface->texture %sdl-renderer image)))
+	 ;; (set! a (+ a 1))
+	 ;; (format #t "~a steps with texture ~a~%" a texture))))))
+	 (sdl2:clear-renderer %sdl-renderer)
+	 (sdl2:render-copy %sdl-renderer texture)
+	 (sdl2:present-renderer %sdl-renderer))))))
 
 (define-syntax-rule (move-xy x y scene)
   (make-scene
diff --git a/gacela/scene.scm b/gacela/scene.scm
index 9145907..62b1a1e 100644
--- a/gacela/scene.scm
+++ b/gacela/scene.scm
@@ -43,5 +43,5 @@
   ((scene-procedure scene)))
 
 (define (run-scene scene)
-  (run-game-loop
+  (play-game
    (scene-procedure scene)))
-- 
2.39.5