From 782ccaa753fedbc0d2629a030517d69fe803d012 Mon Sep 17 00:00:00 2001
From: David Ludwig <dludwig@pobox.com>
Date: Wed, 21 Nov 2012 17:38:17 -0500
Subject: [PATCH] WinRT: added code to update the main texture on each frame
 with dummy data

---
 src/video/windowsrt/SDL_winrtrenderer.cpp | 24 +++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/video/windowsrt/SDL_winrtrenderer.cpp b/src/video/windowsrt/SDL_winrtrenderer.cpp
index d87589c11..a7b2a1acc 100644
--- a/src/video/windowsrt/SDL_winrtrenderer.cpp
+++ b/src/video/windowsrt/SDL_winrtrenderer.cpp
@@ -178,6 +178,30 @@ void SDL_winrtrenderer::Render()
 		return;
 	}
 
+	// Update the main texture (for SDL usage):
+	D3D11_MAPPED_SUBRESOURCE textureMemory = {0};
+	DX::ThrowIfFailed(
+		m_d3dContext->Map(
+			m_mainTexture.Get(),
+			0,
+			D3D11_MAP_WRITE_DISCARD,
+			0,
+			&textureMemory)
+		);
+
+	const int max = (int)m_windowBounds.Width * (int)m_windowBounds.Height * 4;
+	uint8 * buf = (uint8 *)textureMemory.pData;
+	for (int i = 0; i < max; i += 4) {
+		buf[i+0] = 0x00;
+		buf[i+1] = 0xFF;
+		buf[i+2] = 0x00;
+		buf[i+3] = 0xFF;
+	}
+
+	m_d3dContext->Unmap(
+		m_mainTexture.Get(),
+		0);
+
 	m_d3dContext->OMSetRenderTargets(
 		1,
 		m_renderTargetView.GetAddressOf(),