From ffb307e4dc5c621a13624b7092d3885ddf13caee Mon Sep 17 00:00:00 2001
From: Sylvain Becker <sylvain.becker@gmail.com>
Date: Sun, 18 Oct 2020 09:52:56 +0200
Subject: [PATCH] Fixed bug 5304 - add SDL_HasSurfaceRLE() (Thanks Rene
 Dudfield and Dan Lawrence)

---
 include/SDL_surface.h             |  7 +++++++
 src/dynapi/SDL_dynapi_overrides.h |  1 +
 src/dynapi/SDL_dynapi_procs.h     |  1 +
 src/video/SDL_surface.c           | 14 ++++++++++++++
 4 files changed, 23 insertions(+)

diff --git a/include/SDL_surface.h b/include/SDL_surface.h
index 2bffb8115..d3f8c814e 100644
--- a/include/SDL_surface.h
+++ b/include/SDL_surface.h
@@ -237,6 +237,13 @@ extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
 extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
                                               int flag);
 
+/**
+ *  \brief Returns whether the surface is RLE enabled
+ *
+ *  \return SDL_TRUE if the surface is RLE enabled, or SDL_FALSE if the surface is NULL or not RLE enabled
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_HasSurfaceRLE(SDL_Surface * surface);
+
 /**
  *  \brief Sets 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 cd3c41ba6..2c7d35fb2 100644
--- a/src/dynapi/SDL_dynapi_overrides.h
+++ b/src/dynapi/SDL_dynapi_overrides.h
@@ -767,3 +767,4 @@
 #define SDL_SIMDRealloc SDL_SIMDRealloc_REAL
 #define SDL_AndroidRequestPermission SDL_AndroidRequestPermission_REAL
 #define SDL_OpenURL SDL_OpenURL_REAL
+#define SDL_HasSurfaceRLE SDL_HasSurfaceRLE_REAL
diff --git a/src/dynapi/SDL_dynapi_procs.h b/src/dynapi/SDL_dynapi_procs.h
index df87ad297..4ddd57b21 100644
--- a/src/dynapi/SDL_dynapi_procs.h
+++ b/src/dynapi/SDL_dynapi_procs.h
@@ -828,3 +828,4 @@ SDL_DYNAPI_PROC(void*,SDL_SIMDRealloc,(void *a, const size_t b),(a, b),return)
 SDL_DYNAPI_PROC(SDL_bool,SDL_AndroidRequestPermission,(const char *a),(a),return)
 #endif
 SDL_DYNAPI_PROC(int,SDL_OpenURL,(const char *a),(a),return)
+SDL_DYNAPI_PROC(SDL_bool,SDL_HasSurfaceRLE,(SDL_Surface *a),(a),return)
diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c
index d6409e8fc..ade68bf34 100644
--- a/src/video/SDL_surface.c
+++ b/src/video/SDL_surface.c
@@ -249,6 +249,20 @@ SDL_SetSurfaceRLE(SDL_Surface * surface, int flag)
     return 0;
 }
 
+SDL_bool
+SDL_HasSurfaceRLE(SDL_Surface * surface)
+{
+    if (!surface) {
+        return SDL_FALSE;
+    }
+
+    if (!(surface->map->info.flags & SDL_COPY_RLE_DESIRED)) {
+        return SDL_FALSE;
+    }
+
+    return SDL_TRUE;
+}
+
 int
 SDL_SetColorKey(SDL_Surface * surface, int flag, Uint32 key)
 {