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Diffstat (limited to 'sdl3/video.scm')
-rw-r--r-- | sdl3/video.scm | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sdl3/video.scm b/sdl3/video.scm new file mode 100644 index 0000000..35a37c8 --- /dev/null +++ b/sdl3/video.scm @@ -0,0 +1,85 @@ +;;; guile-sdl3 -- Scheme bindings for SDL3 +;;; Copyright © 2024 David Thompson <dthompson2@worcester.edu> +;;; +;;; Licensed under the Apache License, Version 2.0 (the "License"); +;;; you may not use this file except in compliance with the License. +;;; You may obtain a copy of the License at +;;; +;;; http://www.apache.org/licenses/LICENSE-2.0 +;;; +;;; Unless required by applicable law or agreed to in writing, software +;;; distributed under the License is distributed on an "AS IS" BASIS, +;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +;;; See the License for the specific language governing permissions and +;;; limitations under the License. + +;;; Commentary: +;; +;; SDL3 display and window management. +;; +;;; Code: + +(define-module (sdl3 video) + #:use-module (rnrs bytevectors) + #:use-module (sdl3 bindings video) + #:use-module (sdl3 errors) + #:use-module (system foreign) + #:export (make-window + destroy-window! + window-size-in-pixels) + #:re-export (window? + window-destroyed?)) + +(define* (make-window title width height #:key + opengl? + vulkan? + metal? + (shown? #t) + fullscreen? + borderless? + transparent? + resizable? + (focusable? #t) + high-pixel-density? + always-on-top? + utility?) + "Open a window with the specified @var{title} and dimensions +@var{width} by @var{height} pixels and return a handle to that window." + (wrap-window + (sdl-assert-non-null + 'make-window + (SDL_CreateWindow (string->pointer title) + width height + (logior + (if opengl? SDL_WINDOW_OPENGL 0) + (if vulkan? SDL_WINDOW_VULKAN 0) + (if metal? SDL_WINDOW_METAL 0) + (if fullscreen? SDL_WINDOW_FULLSCREEN 0) + (if shown? 0 SDL_WINDOW_HIDDEN) + (if borderless? SDL_WINDOW_BORDERLESS 0) + (if transparent? SDL_WINDOW_TRANSPARENT 0) + (if resizable? SDL_WINDOW_RESIZABLE 0) + (if focusable? 0 SDL_WINDOW_NOT_FOCUSABLE) + (if high-pixel-density? SDL_WINDOW_HIGH_PIXEL_DENSITY 0) + (if always-on-top? SDL_WINDOW_ALWAYS_ON_TOP 0) + (if utility? SDL_WINDOW_UTILITY 0)))))) + +;; FIXME: SDL_DestroyWindow recursively destroys child windows. Do we +;; need to keep track of those in Scheme, then? +(define (destroy-window! window) + "Close @var{window} and make handle unusable for further window +management calls." + (unless (window-destroyed? window) + (SDL_DestroyWindow (unwrap-window window)) + (set-window-destroyed! window #t))) + +(define (window-size-in-pixels window) + (let* ((size (sizeof int)) + (bv (make-bytevector (* size 2)))) + (sdl-assert + 'window-size-in-pixels + (SDL_GetWindowSizeInPixels (unwrap-window window) + (bytevector->pointer bv) + (bytevector->pointer bv size))) + (values (bytevector-sint-ref bv 0 (native-endianness) size) + (bytevector-sint-ref bv size (native-endianness) size)))) |