diff --git a/include/SDL_surface.h b/include/SDL_surface.h index 45e5366fe..730d49fc8 100644 --- a/include/SDL_surface.h +++ b/include/SDL_surface.h @@ -248,6 +248,13 @@ extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface, extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface, int flag, Uint32 key); +/** + * \brief Returns whether the surface has a color key + * + * \return SDL_TRUE if the surface has a color key, or SDL_FALSE if the surface is NULL or has no color key + */ +extern DECLSPEC SDL_bool SDLCALL SDL_HasColorKey(SDL_Surface * surface); + /** * \brief Gets the color key (transparent pixel) in a blittable surface. * diff --git a/src/dynapi/SDL_dynapi_overrides.h b/src/dynapi/SDL_dynapi_overrides.h index b1f029f37..9ef18c5a6 100644 --- a/src/dynapi/SDL_dynapi_overrides.h +++ b/src/dynapi/SDL_dynapi_overrides.h @@ -696,3 +696,4 @@ #define SDL_SensorUpdate SDL_SensorUpdate_REAL #define SDL_IsTablet SDL_IsTablet_REAL #define SDL_GetDisplayOrientation SDL_GetDisplayOrientation_REAL +#define SDL_HasColorKey SDL_HasColorKey_REAL diff --git a/src/dynapi/SDL_dynapi_procs.h b/src/dynapi/SDL_dynapi_procs.h index 6619f882a..02f6170bd 100644 --- a/src/dynapi/SDL_dynapi_procs.h +++ b/src/dynapi/SDL_dynapi_procs.h @@ -738,3 +738,4 @@ SDL_DYNAPI_PROC(void,SDL_SensorClose,(SDL_Sensor *a),(a),) SDL_DYNAPI_PROC(void,SDL_SensorUpdate,(void),(),) SDL_DYNAPI_PROC(SDL_bool,SDL_IsTablet,(void),(),return) SDL_DYNAPI_PROC(SDL_DisplayOrientation,SDL_GetDisplayOrientation,(int a),(a),return) +SDL_DYNAPI_PROC(SDL_bool,SDL_HasColorKey,(SDL_Surface *a),(a),return) diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c index b1bcc46c1..f8b29d95c 100644 --- a/src/render/SDL_render.c +++ b/src/render/SDL_render.c @@ -649,7 +649,7 @@ SDL_CreateTextureFromSurface(SDL_Renderer * renderer, SDL_Surface * surface) /* See what the best texture format is */ fmt = surface->format; - if (fmt->Amask || SDL_GetColorKey(surface, NULL) == 0) { + if (fmt->Amask || (SDL_HasColorKey(surface) && SDL_GetColorKey(surface, NULL) == 0)) { needAlpha = SDL_TRUE; } else { needAlpha = SDL_FALSE; diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c index 719f831e8..c6fd3b5fb 100644 --- a/src/video/SDL_surface.c +++ b/src/video/SDL_surface.c @@ -292,6 +292,20 @@ SDL_SetColorKey(SDL_Surface * surface, int flag, Uint32 key) return 0; } +SDL_bool +SDL_HasColorKey(SDL_Surface * surface) +{ + if (!surface) { + return SDL_FALSE; + } + + if (!(surface->map->info.flags & SDL_COPY_COLORKEY)) { + return SDL_FALSE; + } + + return SDL_TRUE; +} + int SDL_GetColorKey(SDL_Surface * surface, Uint32 * key) {