From d1f031c8eecb5410049a92d41307e691a8840c9c Mon Sep 17 00:00:00 2001
From: Sylvain Becker <sylvain.becker@gmail.com>
Date: Tue, 5 Jan 2021 12:08:16 +0100
Subject: [PATCH] Add SDL_UpdateNVTexture for d3d11 (bug #5430) (not tested)

---
 src/render/direct3d11/SDL_render_d3d11.c | 25 ++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/render/direct3d11/SDL_render_d3d11.c b/src/render/direct3d11/SDL_render_d3d11.c
index cb53a2507..f5abaab9e 100644
--- a/src/render/direct3d11/SDL_render_d3d11.c
+++ b/src/render/direct3d11/SDL_render_d3d11.c
@@ -1403,6 +1403,30 @@ D3D11_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
     return 0;
 }
 
+static int
+D3D11_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
+                       const SDL_Rect * rect,
+                       const Uint8 *Yplane, int Ypitch,
+                       const Uint8 *UVplane, int UVpitch)
+{
+    D3D11_RenderData *rendererData = (D3D11_RenderData *)renderer->driverdata;
+    D3D11_TextureData *textureData = (D3D11_TextureData *)texture->driverdata;
+
+    if (!textureData) {
+        SDL_SetError("Texture is not currently available");
+        return -1;
+    }
+
+    if (D3D11_UpdateTextureInternal(rendererData, textureData->mainTexture, SDL_BYTESPERPIXEL(texture->format), rect->x, rect->y, rect->w, rect->h, Yplane, Ypitch) < 0) {
+        return -1;
+    }
+
+    if (D3D11_UpdateTextureInternal(rendererData, textureData->mainTextureNV, SDL_BYTESPERPIXEL(texture->format), rect->x / 2, rect->y / 2, rect->w / 2, rect->h / 2, UVplane, UVpitch / 2) < 0) {
+        return -1;
+    }
+    return 0;
+}
+
 static int
 D3D11_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                   const SDL_Rect * rect, void **pixels, int *pitch)
@@ -2516,6 +2540,7 @@ D3D11_CreateRenderer(SDL_Window * window, Uint32 flags)
     renderer->CreateTexture = D3D11_CreateTexture;
     renderer->UpdateTexture = D3D11_UpdateTexture;
     renderer->UpdateTextureYUV = D3D11_UpdateTextureYUV;
+    renderer->UpdateTextureNV = D3D11_UpdateTextureNV;
     renderer->LockTexture = D3D11_LockTexture;
     renderer->UnlockTexture = D3D11_UnlockTexture;
     renderer->SetTextureScaleMode = D3D11_SetTextureScaleMode;