diff options
Diffstat (limited to 'sdl2/surface.scm')
| -rw-r--r-- | sdl2/surface.scm | 90 |
1 files changed, 89 insertions, 1 deletions
diff --git a/sdl2/surface.scm b/sdl2/surface.scm index 1537c58..98ddf70 100644 --- a/sdl2/surface.scm +++ b/sdl2/surface.scm @@ -37,7 +37,9 @@ surface-width surface-height surface-pitch - surface-pixels)) + surface-pixels + + convert-surface-format)) (define-wrapped-pointer-type <surface> surface? @@ -108,3 +110,89 @@ PROC." (native-endianness) %pointer-size)))) (pointer->bytevector pixels (* height pitch)))) + +(define (symbol->sdl-pixel-format sym) + (match sym + ('index1lsb ffi:SDL_PIXELFORMAT_INDEX1LSB) + ('index1msb ffi:SDL_PIXELFORMAT_INDEX1MSB) + ('index4lsb ffi:SDL_PIXELFORMAT_INDEX4LSB) + ('index4msb ffi:SDL_PIXELFORMAT_INDEX4MSB) + ('index8 ffi:SDL_PIXELFORMAT_INDEX8) + ('rgb332 ffi:SDL_PIXELFORMAT_RGB332) + ('rgb444 ffi:SDL_PIXELFORMAT_RGB444) + ('rgb555 ffi:SDL_PIXELFORMAT_RGB555) + ('bgr555 ffi:SDL_PIXELFORMAT_BGR555) + ('argb4444 ffi:SDL_PIXELFORMAT_ARGB4444) + ('rgba4444 ffi:SDL_PIXELFORMAT_RGBA4444) + ('abgr4444 ffi:SDL_PIXELFORMAT_ABGR4444) + ('bgra4444 ffi:SDL_PIXELFORMAT_BGRA4444) + ('argb1555 ffi:SDL_PIXELFORMAT_ARGB1555) + ('rgba5551 ffi:SDL_PIXELFORMAT_RGBA5551) + ('abgr1555 ffi:SDL_PIXELFORMAT_ABGR1555) + ('bgra5551 ffi:SDL_PIXELFORMAT_BGRA5551) + ('rgb565 ffi:SDL_PIXELFORMAT_RGB565) + ('bgr565 ffi:SDL_PIXELFORMAT_BGR565) + ('rgb24 ffi:SDL_PIXELFORMAT_RGB24) + ('bgr24 ffi:SDL_PIXELFORMAT_BGR24) + ('rgb888 ffi:SDL_PIXELFORMAT_RGB888) + ('rgbx8888 ffi:SDL_PIXELFORMAT_RGBX8888) + ('bgr888 ffi:SDL_PIXELFORMAT_BGR888) + ('bgrx8888 ffi:SDL_PIXELFORMAT_BGRX8888) + ('argb8888 ffi:SDL_PIXELFORMAT_ARGB8888) + ('rgba8888 ffi:SDL_PIXELFORMAT_RGBA8888) + ('abgr8888 ffi:SDL_PIXELFORMAT_ABGR8888) + ('bgra8888 ffi:SDL_PIXELFORMAT_BGRA8888) + ('argb2101010 ffi:SDL_PIXELFORMAT_ARGB2101010) + ('yv12 ffi:SDL_PIXELFORMAT_YV12) + ('iyuv ffi:SDL_PIXELFORMAT_IYUV) + ('yuy2 ffi:SDL_PIXELFORMAT_YUY2) + ('uyvy ffi:SDL_PIXELFORMAT_UYVY) + ('yvyu ffi:SDL_PIXELFORMAT_YVYU))) + +(define (convert-surface-format surface format) + "Convert the pixels in SURFACE to FORMAT, a symbol representing a +specific pixel format, and return a new surface object. + +Valid format types are: + +- index1lsb +- index1msb +- index4lsb +- index4msb +- index8 +- rgb332 +- rgb444 +- rgb555 +- bgr555 +- argb4444 +- rgba4444 +- abgr4444 +- bgra4444 +- argb1555 +- rgba5551 +- abgr1555 +- bgra5551 +- rgb565 +- bgr565 +- rgb24 +- bgr24 +- rgb888 +- rgbx8888 +- bgr888 +- bgrx8888 +- argb8888 +- rgba8888 +- abgr8888 +- bgra8888 +- argb2101010 +- yv12 +- iyuv +- yuy2 +- uyvy +- yvyu" + (let ((ptr (ffi:sdl-convert-surface-format (unwrap-surface surface) + (symbol->sdl-pixel-format format) + 0))) + (if (null-pointer? ptr) + (sdl-error "convert-surface-format" "failed to convert surface format") + (wrap-surface surface)))) |