diff options
Diffstat (limited to '2d/sprite.scm')
| -rw-r--r-- | 2d/sprite.scm | 289 |
1 files changed, 38 insertions, 251 deletions
diff --git a/2d/sprite.scm b/2d/sprite.scm index 53fc961..a4a0719 100644 --- a/2d/sprite.scm +++ b/2d/sprite.scm @@ -25,258 +25,14 @@ (define-module (2d sprite) #:use-module (srfi srfi-1) #:use-module (srfi srfi-9) - #:use-module (srfi srfi-42) #:use-module (figl gl) #:use-module (figl contrib packed-struct) #:use-module ((sdl sdl) #:prefix SDL:) - #:use-module (2d vector) - #:use-module (2d gl) + #:use-module (2d animation) #:use-module (2d helpers) - #:export (make-texture - texture? - texture-id - texture-width - texture-height - surface->texture - load-texture - texture-quad - make-texture-region - texture-region? - texture-region-texture - texture-region-width - texture-region-height - texture-region-u - texture-region-v - texture-region-u2 - texture-region-v2 - split-texture - make-animation - animation? - animation-frames - animation-duration - animation-loop? - animation-frame - animation-length - make-sprite - sprite? - sprite-drawable - set-sprite-drawable! - sprite-position - set-sprite-position! - sprite-scale - set-sprite-scale! - sprite-rotation - set-sprite-rotation! - sprite-color - set-sprite-color! - sprite-anchor - set-sprite-anchor! - sprite-vertices - set-sprite-vertices! - load-sprite - draw-sprite - make-sprite-batch - sprite-batch? - sprite-batch-max-size - sprite-batch-size - set-sprite-batch-size! - sprite-batch-texture - set-sprite-batch-texture! - sprite-batch-vertices - sprite-batch-draw - with-sprite-batch)) - -;;; -;;; Textures -;;; - -;; The <texture> object is a simple wrapper around an OpenGL texture -;; id. -(define-record-type <texture> - (make-texture id width height) - texture? - (id texture-id) - (width texture-width) - (height texture-height)) - -;; Use a guardian and an after GC hook that ensures that OpenGL -;; textures are deleted when texture objects are GC'd. -(define texture-guardian (make-guardian)) - -(define (reap-textures) - (let loop ((texture (texture-guardian))) - (when texture - ;; When attempting to reap structures upon guile exit, the - ;; dynamic pointer to gl-delete-textures becomes invalid. So, we - ;; ignore the error and move on. - (catch 'misc-error - (lambda () (gl-delete-texture (texture-id texture))) - (lambda (key . args) #f)) - (loop (texture-guardian))))) - -(add-hook! after-gc-hook reap-textures) - -(define (surface-pixel-format surface) - "Returns the OpenGL pixel format for a surface. RGB and RGBA formats -are supported." - (case (SDL:surface:depth surface) - ((24) (pixel-format* rgb)) - ((32) (pixel-format* rgba)) - (else (throw 'unsupported-pixel-format (SDL:surface:depth surface))))) - -(define (surface->texture surface) - "Translates an SDL surface into an OpenGL texture. -Currently only works with RGBA format surfaces." - (let ((texture-id (gl-generate-texture)) - (pixel-format (surface-pixel-format surface))) - (with-gl-bind-texture (texture-target texture-2d) texture-id - (gl-texture-parameter (texture-target texture-2d) - (texture-parameter-name texture-min-filter) - (texture-min-filter linear)) - (gl-texture-parameter (texture-target texture-2d) - (texture-parameter-name texture-mag-filter) - (texture-mag-filter linear)) - (gl-texture-image-2d (texture-target texture-2d) - 0 - pixel-format - (SDL:surface:w surface) - (SDL:surface:h surface) - 0 - pixel-format - (color-pointer-type unsigned-byte) - (SDL:surface-pixels surface))) - (let ((texture (make-texture texture-id - (SDL:surface:w surface) - (SDL:surface:h surface)))) - (texture-guardian texture) - texture))) - -(define (load-texture filename) - "Loads a texture from a file." - (surface->texture (SDL:load-image filename))) - -(define* (texture-quad texture x y w h #:optional (color '(1 1 1)) - (u 0) (v 0) (u2 1) (v2 1)) - "Renders a textured quad." - (let ((x2 (+ x w)) - (y2 (+ y h))) - (with-gl-bind-texture (texture-target texture-2d) (texture-id texture) - (gl-begin (primitive-type quads) - (apply gl-color color) - (gl-texture-coordinates u v) - (gl-vertex x y) - (gl-texture-coordinates u2 v) - (gl-vertex x2 y) - (gl-texture-coordinates u2 v2) - (gl-vertex x2 y2) - (gl-texture-coordinates u v2) - (gl-vertex x y2))))) - -;;; -;;; Texture Regions -;;; - -;; Texture regions represent a segment of a texture. - -(define-record-type <texture-region> - (%make-texture-region texture width height u v u2 v2) - texture-region? - (texture texture-region-texture) - (width texture-region-width) - (height texture-region-height) - (u texture-region-u) - (v texture-region-v) - (u2 texture-region-u2) - (v2 texture-region-v2)) - -(define (make-texture-region texture x y width height) - "Creates a new texture region given a texture and a pixel region." - (let* ((w (texture-width texture)) - (h (texture-height texture)) - (u (/ x w)) - (v (/ y h)) - (u2 (/ (+ x width) w)) - (v2 (/ (+ y height) h))) - (%make-texture-region texture width height u v u2 v2))) - -(define* (split-texture texture width height - #:optional #:key (margin 0) (spacing 0)) - "Splits a texture into a vector of texture regions of width x height -size." - (define (build-tile tx ty) - (let* ((x (+ (* tx (+ width spacing)) margin)) - (y (+ (* ty (+ height spacing)) margin))) - (make-texture-region texture x y width height))) - - (let* ((tw (texture-width texture)) - (th (texture-height texture)) - (rows (/ (- tw margin) (+ width spacing))) - (columns (/ (- tw margin) (+ height spacing)))) - (vector-ec (: y rows) (: x columns) (build-tile x y)))) - -;;; -;;; Animations -;;; - -;; The <animation> type represents a vector of textures or texture -;; regions that are to be played in sequence and possibly looped. -(define-record-type <animation> - (make-animation frames duration loop) - animation? - (frames animation-frames) - (duration animation-duration) - (loop animation-loop?)) - -(define (animation-frame animation index) - "Returns the frame for the given index." - (vector-ref (animation-frames animation) index)) - -(define (animation-length animation) - "Returns the number of frames in the animation" - (vector-length (animation-frames animation))) - -;; The <animation-state> type encapsulates the state for playing an -;; animation. -(define-record-type <animation-state> - (%make-animation-state animation frame-index frame-time playing) - animation-state? - (animation animation-state-animation) - (frame-index animation-state-frame-index) - (frame-time animation-state-frame-time) - (playing animation-state-playing?)) - -(define (make-animation-state animation) - (%make-animation-state animation 0 0 #t)) - -(define (update-animation-state state) - "Increments the frame time for the animation state and determines -which frame to show. Returns a new animation-state object." - (let ((frame-time (1+ (animation-state-frame-time state))) - (frame-index (animation-state-frame-index state)) - (playing (animation-state-playing? state)) - (animation (animation-state-animation state))) - - ;; Return the same state object if the animation is not playing. - (cond ((not playing) - state) - ;; Return a new state object with a reset frame-index and - ;; frame-time if we've reached the end of the animation. - ;; Stops playing the animation if the animation does not - ;; loop. - ((and playing (= frame-time (animation-duration animation))) - (let* ((frame-index (modulo (1+ frame-index) - (animation-length animation))) - (frame-time 0) - (playing (or (not (= frame-index 0)) - (animation-loop? animation)))) - (%make-animation-state animation frame-index frame-time playing))) - ;; Return a new state object with an incremented frame index. - (else - (%make-animation-state animation frame-index frame-time playing))))) - -(define (animation-state-frame state) - (animation-frame (animation-state-animation state) - (animation-state-frame-index state))) + #:use-module (2d texture) + #:use-module (2d gl) + #:use-module (2d vector)) ;;; ;;; Sprites @@ -284,14 +40,15 @@ which frame to show. Returns a new animation-state object." ;; Used to build OpenGL vertex array for a sprite. (define-packed-struct sprite-vertex + ;; Position (x float) (y float) - + ;; Color (r float) (g float) (b float) (a float) - + ;; Texture Coordinates (s float) (t float)) @@ -430,7 +187,7 @@ sprite." "Renders a sprite. A sprite batch will be used if one is currently bound." (when (animation? (sprite-drawable sprite)) - (let ((state (update-animation-state (sprite-animation-state sprite)))) + (let ((state (tick-animation-state (sprite-animation-state sprite)))) (set-sprite-animation-state! sprite state))) (if *sprite-batch* @@ -502,6 +259,25 @@ bound." (gl-disable-client-state (enable-cap color-array)) (gl-disable-client-state (enable-cap vertex-array))))) +(export make-sprite + sprite? + sprite-drawable + set-sprite-drawable! + sprite-position + set-sprite-position! + sprite-scale + set-sprite-scale! + sprite-rotation + set-sprite-rotation! + sprite-color + set-sprite-color! + sprite-anchor + set-sprite-anchor! + sprite-vertices + set-sprite-vertices! + load-sprite + draw-sprite) + ;;; ;;; Sprite batches ;;; @@ -619,3 +395,14 @@ batched texture vertices first." ... (sprite-batch-render batch) (set! *sprite-batch* #f))) + +(export make-sprite-batch + sprite-batch? + sprite-batch-max-size + sprite-batch-size + set-sprite-batch-size! + sprite-batch-texture + set-sprite-batch-texture! + sprite-batch-vertices + sprite-batch-draw + with-sprite-batch) |