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SDL_MUSTLOCK() returns true once a surface has the RLE flag set

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This more closely matches the mental model of people using SDL, and locking a surface that isn't RLE encoded doesn't cause any issues.

Fixes https://github.com/libsdl-org/SDL/issues/5594
This commit is contained in:
Sam Lantinga 2024-07-17 14:03:53 -07:00
parent de6595bda6
commit eefcb62588
2 changed files with 3 additions and 8 deletions
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7
src/video/SDL_RLEaccel.c
View File

@ -62,7 +62,7 @@
*
* Encoding of surfaces with per-pixel alpha:
*
* The sequence begins with a struct SDL_PixelFormatDetails describing the target
* The sequence begins with an SDL_PixelFormat value describing the target
* pixel format, to provide reliable un-encoding.
*
* Each scan line is encoded twice: First all completely opaque pixels,
@ -1425,7 +1425,6 @@ int SDL_RLESurface(SDL_Surface *surface)
/* The surface is now accelerated */
surface->internal->flags |= SDL_INTERNAL_SURFACE_RLEACCEL;
SDL_UpdateSurfaceLockFlag(surface);
return 0;
}
@ -1521,7 +1520,6 @@ void SDL_UnRLESurface(SDL_Surface *surface, SDL_bool recode)
{
if (surface->internal->flags & SDL_INTERNAL_SURFACE_RLEACCEL) {
surface->internal->flags &= ~SDL_INTERNAL_SURFACE_RLEACCEL;
SDL_UpdateSurfaceLockFlag(surface);
if (recode && !(surface->flags & SDL_SURFACE_PREALLOCATED)) {
if (surface->internal->map.info.flags & SDL_COPY_RLE_COLORKEY) {
@ -1532,14 +1530,12 @@ void SDL_UnRLESurface(SDL_Surface *surface, SDL_bool recode)
if (SDL_size_mul_overflow(surface->h, surface->pitch, &size)) {
/* Memory corruption? */
surface->internal->flags |= SDL_INTERNAL_SURFACE_RLEACCEL;
SDL_UpdateSurfaceLockFlag(surface);
return;
}
surface->pixels = SDL_aligned_alloc(SDL_GetSIMDAlignment(), size);
if (!surface->pixels) {
/* Oh crap... */
surface->internal->flags |= SDL_INTERNAL_SURFACE_RLEACCEL;
SDL_UpdateSurfaceLockFlag(surface);
return;
}
surface->flags |= SDL_SURFACE_SIMD_ALIGNED;
@ -1556,7 +1552,6 @@ void SDL_UnRLESurface(SDL_Surface *surface, SDL_bool recode)
if (!UnRLEAlpha(surface)) {
/* Oh crap... */
surface->internal->flags |= SDL_INTERNAL_SURFACE_RLEACCEL;
SDL_UpdateSurfaceLockFlag(surface);
return;
}
}

4
src/video/SDL_surface.c
View File

@ -46,7 +46,7 @@ SDL_bool SDL_SurfaceValid(SDL_Surface *surface)
void SDL_UpdateSurfaceLockFlag(SDL_Surface *surface)
{
if (surface->internal->flags & SDL_INTERNAL_SURFACE_RLEACCEL) {
if (SDL_SurfaceHasRLE(surface)) {
surface->flags |= SDL_SURFACE_LOCK_NEEDED;
} else {
surface->flags &= ~SDL_SURFACE_LOCK_NEEDED;
@ -460,6 +460,7 @@ int SDL_SetSurfaceRLE(SDL_Surface *surface, SDL_bool enabled)
if (surface->internal->map.info.flags != flags) {
SDL_InvalidateMap(&surface->internal->map);
}
SDL_UpdateSurfaceLockFlag(surface);
return 0;
}
@ -1250,7 +1251,6 @@ int SDL_LockSurface(SDL_Surface *surface)
if (surface->internal->flags & SDL_INTERNAL_SURFACE_RLEACCEL) {
SDL_UnRLESurface(surface, SDL_TRUE);
surface->internal->flags |= SDL_INTERNAL_SURFACE_RLEACCEL; /* save accel'd state */
SDL_UpdateSurfaceLockFlag(surface);
}
#endif
}