commit 179bc26a62bfdae4ddde5af54b42a2eb262397a3
author Ryan C. Gordon <icculus@icculus.org> Sun Dec 22 20:48:43 2019 -0500
committer Ryan C. Gordon <icculus@icculus.org> Sun Dec 22 20:48:43 2019 -0500
tree f23ec9c45f9649622058606a3d59430ad397d0bf
parent b6744ae1c2663abf6435fe8622a0ff0b169374a4

direct3d11: Always set vertex buffers when updating them (thanks, Konrad!).

Fixes Bugzilla #4913.

src/render/direct3d11/SDL_render_d3d11.c

diff --git a/src/render/direct3d11/SDL_render_d3d11.c b/src/render/direct3d11/SDL_render_d3d11.c
index 7ae0d02..bcd7b86 100644
--- a/src/render/direct3d11/SDL_render_d3d11.c
+++ b/src/render/direct3d11/SDL_render_d3d11.c
@@ -1835,6 +1835,8 @@
     D3D11_RenderData *rendererData = (D3D11_RenderData *) renderer->driverdata;
     HRESULT result = S_OK;
     const int vbidx = rendererData->currentVertexBuffer;
+    const UINT stride = sizeof(VertexPositionColor);
+    const UINT offset = 0;
 
     if (dataSizeInBytes == 0) {
         return 0;  /* nothing to do. */
@@ -1858,8 +1860,6 @@
     } else {
         D3D11_BUFFER_DESC vertexBufferDesc;
         D3D11_SUBRESOURCE_DATA vertexBufferData;
-        const UINT stride = sizeof(VertexPositionColor);
-        const UINT offset = 0;
 
         SAFE_RELEASE(rendererData->vertexBuffers[vbidx]);
 
@@ -1885,16 +1885,16 @@
         }
 
         rendererData->vertexBufferSizes[vbidx] = dataSizeInBytes;
-
-        ID3D11DeviceContext_IASetVertexBuffers(rendererData->d3dContext,
-            0,
-            1,
-            &rendererData->vertexBuffers[vbidx],
-            &stride,
-            &offset
-            );
     }
 
+    ID3D11DeviceContext_IASetVertexBuffers(rendererData->d3dContext,
+        0,
+        1,
+        &rendererData->vertexBuffers[vbidx],
+        &stride,
+        &offset
+        );
+
     rendererData->currentVertexBuffer++;
     if (rendererData->currentVertexBuffer >= SDL_arraysize(rendererData->vertexBuffers)) {
         rendererData->currentVertexBuffer = 0;