From 5e6aba067003a553ae29e06e75faa9914f939031 Mon Sep 17 00:00:00 2001 From: David Ludwig Date: Sun, 22 Dec 2013 21:13:35 -0500 Subject: [PATCH] WinRT: better rendering performance via D3D11_USAGE_DYNAMIC --- src/render/direct3d11/SDL_render_d3d11.cpp | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/src/render/direct3d11/SDL_render_d3d11.cpp b/src/render/direct3d11/SDL_render_d3d11.cpp index 6852af82f..37e355dbb 100644 --- a/src/render/direct3d11/SDL_render_d3d11.cpp +++ b/src/render/direct3d11/SDL_render_d3d11.cpp @@ -1384,7 +1384,7 @@ D3D11_RenderClear(SDL_Renderer * renderer) static int D3D11_UpdateVertexBuffer(SDL_Renderer *renderer, - const void * vertexData, unsigned int dataSizeInBytes) + const void * vertexData, size_t dataSizeInBytes) { D3D11_RenderData *rendererData = (D3D11_RenderData *) renderer->driverdata; HRESULT result = S_OK; @@ -1397,10 +1397,20 @@ D3D11_UpdateVertexBuffer(SDL_Renderer *renderer, } if (vertexBufferDesc.ByteWidth >= dataSizeInBytes) { - rendererData->d3dContext->UpdateSubresource(rendererData->vertexBuffer.Get(), 0, NULL, vertexData, dataSizeInBytes, 0); + D3D11_MAPPED_SUBRESOURCE mappedResource; + ZeroMemory(&mappedResource, sizeof(D3D11_MAPPED_SUBRESOURCE)); + result = rendererData->d3dContext->Map(rendererData->vertexBuffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource); + if (FAILED(result)) { + WIN_SetErrorFromHRESULT(__FUNCTION__, result); + return -1; + } + memcpy(mappedResource.pData, vertexData, dataSizeInBytes); + rendererData->d3dContext->Unmap(rendererData->vertexBuffer.Get(), 0); } else { vertexBufferDesc.ByteWidth = dataSizeInBytes; + vertexBufferDesc.Usage = D3D11_USAGE_DYNAMIC; vertexBufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER; + vertexBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE; D3D11_SUBRESOURCE_DATA vertexBufferData = {0}; vertexBufferData.pSysMem = vertexData;