Added SDL_RenderGetD3D11Device() to get access to the device associated with the D3D11 renderer

include/SDL_system.h

@@ -59,12 +59,20 @@ extern DECLSPEC int SDLCALL SDL_Direct3D9GetAdapterIndex( int displayIndex );
 
 typedef struct IDirect3DDevice9 IDirect3DDevice9;
 /**
-   \brief Returns the D3D device associated with a renderer, or NULL if it's not a D3D renderer.
+   \brief Returns the D3D9 device associated with a renderer, or NULL if it's not a D3D9 renderer.
 
    Once you are done using the device, you should release it to avoid a resource leak.
  */
 extern DECLSPEC IDirect3DDevice9* SDLCALL SDL_RenderGetD3D9Device(SDL_Renderer * renderer);
 
+typedef struct ID3D11Device ID3D11Device;
+/**
+   \brief Returns the D3D11 device associated with a renderer, or NULL if it's not a D3D11 renderer.
+
+   Once you are done using the device, you should release it to avoid a resource leak.
+ */
+extern DECLSPEC ID3D11Device* SDLCALL SDL_RenderGetD3D11Device(SDL_Renderer * renderer);
+
 /**
    \brief Returns the DXGI Adapter and Output indices for the specified display index.
 

src/dynapi/SDL_dynapi_overrides.h

@@ -793,3 +793,4 @@
 #define SDL_lround SDL_lround_REAL
 #define SDL_lroundf SDL_lroundf_REAL
 #define SDL_SoftStretchLinear SDL_SoftStretchLinear_REAL
+#define SDL_RenderGetD3D11Device SDL_RenderGetD3D11Device_REAL

src/dynapi/SDL_dynapi_procs.h

@@ -854,3 +854,6 @@ SDL_DYNAPI_PROC(float,SDL_roundf,(float a),(a),return)
 SDL_DYNAPI_PROC(long,SDL_lround,(double a),(a),return)
 SDL_DYNAPI_PROC(long,SDL_lroundf,(float a),(a),return)
 SDL_DYNAPI_PROC(int,SDL_SoftStretchLinear,(SDL_Surface *a, const SDL_Rect *b, SDL_Surface *c, const SDL_Rect *d),(a,b,c,d),return)
+#ifdef __WIN32__
+SDL_DYNAPI_PROC(ID3D11Device*,SDL_RenderGetD3D11Device,(SDL_Renderer *a),(a),return)
+#endif

src/render/direct3d11/SDL_render_d3d11.c

@@ -20,6 +20,9 @@
 */
 #include "../../SDL_internal.h"
 
+#include "SDL_render.h"
+#include "SDL_system.h"
+
 #if SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED
 
 #define COBJMACROS
@@ -2595,4 +2598,30 @@ SDL_RenderDriver D3D11_RenderDriver = {
 
 #endif /* SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED */
 
+#ifdef __WIN32__
+/* This function needs to always exist on Windows, for the Dynamic API. */
+ID3D11Device *
+SDL_RenderGetD3D11Device(SDL_Renderer * renderer)
+{
+    ID3D11Device *device = NULL;
+
+#if SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED
+    D3D11_RenderData *data = (D3D11_RenderData *) renderer->driverdata;
+
+    /* Make sure that this is a D3D renderer */
+    if (renderer->DestroyRenderer != D3D11_DestroyRenderer) {
+        SDL_SetError("Renderer is not a D3D11 renderer");
+        return NULL;
+    }
+
+    device = (ID3D11Device *)data->d3dDevice;
+    if (device) {
+        ID3D11Device_AddRef(device);
+    }
+#endif /* SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED */
+
+    return device;
+}
+#endif /* __WIN32__ */
+
 /* vi: set ts=4 sw=4 expandtab: */