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authorLeo Prikler <leo.prikler@student.tugraz.at>2020-12-15 00:06:05 +0100
committerDavid Thompson <dthompson2@worcester.edu>2020-12-15 10:46:41 -0500
commit80dd0c8e510f57774e4ec4c2246108259bb26b4d (patch)
tree5c69d96036be2a314c3ae971ab4a72d7c0c79b25 /sdl2/render.scm
parentbbac3c383c6564813e906797ea7cb2b76c0dcdfb (diff)
render: Add SDL_QueryTexture binding.
* sdl2/bindings.scm (sdl-query-texture): New variable. * sdl2/render.scm (query-texture): New variable. * doc/api.texi: Document it here.
Diffstat (limited to 'sdl2/render.scm')
-rw-r--r--sdl2/render.scm61
1 files changed, 60 insertions, 1 deletions
diff --git a/sdl2/render.scm b/sdl2/render.scm
index 948e256..e51e476 100644
--- a/sdl2/render.scm
+++ b/sdl2/render.scm
@@ -67,7 +67,8 @@
make-texture
delete-texture!
- surface->texture))
+ surface->texture
+ query-texture))
;;;
@@ -344,6 +345,64 @@ created with 'texture')"
"Free the memory used by TEXTURE."
(ffi:sdl-destroy-texture (unwrap-texture texture)))
+(define (query-texture texture)
+ "Return 4 values for the format, access, width and height of
+TEXTURE."
+ (let ((bv (make-bytevector (+ (sizeof uint32)
+ (* 3 (sizeof int)))
+ 0)))
+ (unless (zero?
+ (ffi:sdl-query-texture
+ (unwrap-texture texture)
+ (bytevector->pointer bv)
+ (bytevector->pointer bv (sizeof uint32))
+ (bytevector->pointer bv (+ (sizeof uint32) (sizeof int)))
+ (bytevector->pointer bv (+ (sizeof uint32) (* 2 (sizeof int))))))
+ (sdl-error "query-texture" "Failed to query texture"))
+ (values
+ (match (bytevector-uint-ref bv 0 (native-endianness) (sizeof uint32))
+ (ffi:SDL_PIXELFORMAT_INDEX1LSB 'index1lsb)
+ (ffi:SDL_PIXELFORMAT_INDEX1MSB 'index1msb)
+ (ffi:SDL_PIXELFORMAT_INDEX4LSB 'index4lsb)
+ (ffi:SDL_PIXELFORMAT_INDEX4MSB 'index4msb)
+ (ffi:SDL_PIXELFORMAT_INDEX8 'index8)
+ (ffi:SDL_PIXELFORMAT_RGB332 'rgb332)
+ (ffi:SDL_PIXELFORMAT_RGB444 'rgb444)
+ (ffi:SDL_PIXELFORMAT_RGB555 'rgb555)
+ (ffi:SDL_PIXELFORMAT_BGR555 'bgr555)
+ (ffi:SDL_PIXELFORMAT_ARGB4444 'argb4444)
+ (ffi:SDL_PIXELFORMAT_RGBA4444 'rgba4444)
+ (ffi:SDL_PIXELFORMAT_ABGR4444 'abgr4444)
+ (ffi:SDL_PIXELFORMAT_BGRA4444 'bgra4444)
+ (ffi:SDL_PIXELFORMAT_ARGB1555 'argb1555)
+ (ffi:SDL_PIXELFORMAT_RGBA5551 'rgba5551)
+ (ffi:SDL_PIXELFORMAT_ABGR1555 'abgr1555)
+ (ffi:SDL_PIXELFORMAT_BGRA5551 'bgra5551)
+ (ffi:SDL_PIXELFORMAT_RGB565 'rgb565)
+ (ffi:SDL_PIXELFORMAT_BGR565 'bgr565)
+ (ffi:SDL_PIXELFORMAT_RGB24 'rgb24)
+ (ffi:SDL_PIXELFORMAT_BGR24 'bgr24)
+ (ffi:SDL_PIXELFORMAT_RGB888 'rgb888)
+ (ffi:SDL_PIXELFORMAT_RGBX8888 'rgbx8888)
+ (ffi:SDL_PIXELFORMAT_BGR888 'bgr888)
+ (ffi:SDL_PIXELFORMAT_BGRX8888 'bgrx8888)
+ (ffi:SDL_PIXELFORMAT_ARGB8888 'argb8888)
+ (ffi:SDL_PIXELFORMAT_RGBA8888 'rgba8888)
+ (ffi:SDL_PIXELFORMAT_ABGR8888 'abgr8888)
+ (ffi:SDL_PIXELFORMAT_BGRA8888 'bgra8888)
+ (ffi:SDL_PIXELFORMAT_ARGB2101010 'argb2101010)
+ (ffi:SDL_PIXELFORMAT_YV12 'yv12)
+ (ffi:SDL_PIXELFORMAT_IYUV 'iyuv)
+ (ffi:SDL_PIXELFORMAT_YUY2 'yuy2)
+ (ffi:SDL_PIXELFORMAT_UYVY 'uyvy)
+ (ffi:SDL_PIXELFORMAT_YVYU 'yvyu))
+ (match (bytevector-uint-ref bv (sizeof int) (native-endianness) (sizeof int))
+ (ffi:SDL_TEXTUREACCESS_STATIC 'static)
+ (ffi:SDL_TEXTUREACCESS_STREAMING 'streaming)
+ (ffi:SDL_TEXTUREACCESS_TARGET 'target))
+ (bytevector-uint-ref bv (* 2 (sizeof int)) (native-endianness) (sizeof int))
+ (bytevector-uint-ref bv (* 3 (sizeof int)) (native-endianness) (sizeof int)))))
+
(define (set-texture-color-mod! texture r g b)
"Get color mod of TEXTURE as a list of the integers."
(unless (zero? (ffi:sdl-set-texture-color-mod (unwrap-texture texture) r g b))