diff options
| -rw-r--r-- | chickadee/graphics/framebuffer.scm | 103 |
1 files changed, 51 insertions, 52 deletions
diff --git a/chickadee/graphics/framebuffer.scm b/chickadee/graphics/framebuffer.scm index 5a8be8d..da99223 100644 --- a/chickadee/graphics/framebuffer.scm +++ b/chickadee/graphics/framebuffer.scm @@ -94,60 +94,59 @@ #:bind bind-framebuffer) (define %clear-color (transparency 0.0)) +(define %draw-buffers (bytevector->pointer (u32vector (version-3-0 color-attachment0)))) -(define make-framebuffer - (let ((draw-buffers (u32vector (version-3-0 color-attachment0)))) - (lambda* (width height #:key (min-filter 'linear) (mag-filter 'linear) - (wrap-s 'repeat) (wrap-t 'repeat)) - "Create a new framebuffer that renders to a texture with +(define* (make-framebuffer width height #:key (min-filter 'linear) (mag-filter 'linear) + (wrap-s 'repeat) (wrap-t 'repeat)) + "Create a new framebuffer that renders to a texture with dimensions WIDTH x HEIGHT." - (assert-current-graphics-engine) - (let* ((framebuffer-id (generate-framebuffer)) - (renderbuffer-id (generate-renderbuffer)) - (texture (make-texture #f width height - #:flip? #t - #:min-filter min-filter - #:mag-filter mag-filter - #:wrap-s wrap-s - #:wrap-t wrap-t)) - ;; It is convenient to make a default viewport and - ;; projection matrix for the framebuffer so that the - ;; rendering engine can set it whenever it changes to - ;; this framebuffer, saving users the trouble of having - ;; to this tedious task themselves. - (viewport (make-viewport 0 0 width height #:clear-color %clear-color)) - (projection (orthographic-projection 0 width height 0 0 1)) - (framebuffer (%make-framebuffer framebuffer-id - renderbuffer-id - texture - viewport - projection))) - (graphics-engine-guard! framebuffer) - (with-graphics-state! ((framebuffer framebuffer)) - ;; Setup depth buffer. - (gl-bind-renderbuffer (version-3-0 renderbuffer) - renderbuffer-id) - (gl-renderbuffer-storage (version-3-0 renderbuffer) - (pixel-format depth-component) - width - height) - (gl-framebuffer-renderbuffer (version-3-0 framebuffer) - (arb-framebuffer-object depth-attachment) - (version-3-0 renderbuffer) - renderbuffer-id) - ;; Setup framebuffer. - (gl-framebuffer-texture-2d (version-3-0 framebuffer) - (version-3-0 color-attachment0) - (texture-target texture-2d) - ((@@ (chickadee graphics texture) texture-id) - texture) - 0) - (gl-draw-buffers 1 (bytevector->pointer draw-buffers))) - ;; Check for errors. - (unless (= (gl-check-framebuffer-status (version-3-0 framebuffer)) - (version-3-0 framebuffer-complete)) - (error "Framebuffer cannot be created")) - framebuffer)))) + (assert-current-graphics-engine) + (let* ((framebuffer-id (generate-framebuffer)) + (renderbuffer-id (generate-renderbuffer)) + (texture (make-texture #f width height + #:flip? #t + #:min-filter min-filter + #:mag-filter mag-filter + #:wrap-s wrap-s + #:wrap-t wrap-t)) + ;; It is convenient to make a default viewport and + ;; projection matrix for the framebuffer so that the + ;; rendering engine can set it whenever it changes to + ;; this framebuffer, saving users the trouble of having + ;; to this tedious task themselves. + (viewport (make-viewport 0 0 width height #:clear-color %clear-color)) + (projection (orthographic-projection 0 width height 0 0 1)) + (framebuffer (%make-framebuffer framebuffer-id + renderbuffer-id + texture + viewport + projection))) + (graphics-engine-guard! framebuffer) + (with-graphics-state! ((framebuffer framebuffer)) + ;; Setup depth buffer. + (gl-bind-renderbuffer (version-3-0 renderbuffer) + renderbuffer-id) + (gl-renderbuffer-storage (version-3-0 renderbuffer) + (pixel-format depth-component) + width + height) + (gl-framebuffer-renderbuffer (version-3-0 framebuffer) + (arb-framebuffer-object depth-attachment) + (version-3-0 renderbuffer) + renderbuffer-id) + ;; Setup framebuffer. + (gl-framebuffer-texture-2d (version-3-0 framebuffer) + (version-3-0 color-attachment0) + (texture-target texture-2d) + ((@@ (chickadee graphics texture) texture-id) + texture) + 0) + (gl-draw-buffers 1 %draw-buffers)) + ;; Check for errors. + (unless (= (gl-check-framebuffer-status (version-3-0 framebuffer)) + (version-3-0 framebuffer-complete)) + (error "Framebuffer cannot be created")) + framebuffer)) (define-syntax-rule (with-framebuffer framebuffer body ...) ;; As a convenience, initialize the viewport and projection matrix |