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surface: SDL_RotateSurface should update SDL_PROP_SURFACE_ROTATION_FLOAT.

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Fixes #14616.
This commit is contained in:
Ryan C. Gordon
2025-12-07 15:27:36 -05:00
parent 4194879df1
commit 5813d0ec0a
2 changed files with 16 additions and 0 deletions
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8
include/SDL3/SDL_surface.h
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@@ -1027,6 +1027,14 @@ extern SDL_DECLSPEC bool SDLCALL SDL_FlipSurface(SDL_Surface *surface, SDL_FlipM
* larger than the original, with the background filled in with the colorkey,
* if available, or RGBA 255/255/255/0 if not.
*
* If `surface` has the SDL_PROP_SURFACE_ROTATION_FLOAT property set on it,
* the new copy will have the adjusted value set: if the rotation property is
* 90 and `angle` was 30, the new surface will have a property value of 60
* (that is: to be upright vs gravity, this surface needs to rotate 60 more
* degrees). However, note that further rotations on the new surface in this
* example will produce unexpected results, since the image will have resized
* and padded to accommodate the not-90 degree angle.
*
* \param surface the surface to rotate.
* \param angle the rotation angle, in degrees.
* \returns a rotated copy of the surface or NULL on failure; call

8
src/video/SDL_surface.c
View File

@@ -2198,6 +2198,14 @@ SDL_Surface *SDL_RotateSurface(SDL_Surface *surface, float angle)
SDL_DestroySurface(convert);
}
}
if (rotated) {
if (SDL_HasProperty(surface->props, SDL_PROP_SURFACE_ROTATION_FLOAT)) {
const float rotation = (SDL_GetNumberProperty(surface->props, SDL_PROP_SURFACE_ROTATION_FLOAT, 0) - angle);
SDL_SetFloatProperty(SDL_GetSurfaceProperties(rotated), SDL_PROP_SURFACE_ROTATION_FLOAT, rotation);
}
}
return rotated;
}