1 files changed, 2 insertions, 46 deletions

diff --git a/Source/Core/VideoBackends/OGL/VertexManager.cpp b/Source/Core/VideoBackends/OGL/VertexManager.cpp
index d3a8d91bca..427a5ecee3 100644
--- a/Source/Core/VideoBackends/OGL/VertexManager.cpp
+++ b/Source/Core/VideoBackends/OGL/VertexManager.cpp
@@ -42,13 +42,6 @@ static size_t s_index_offset;
 
 VertexManager::VertexManager()
 {
-	LocalVBuffer.resize(MAXVBUFFERSIZE);
-
-	s_pCurBufferPointer = s_pBaseBufferPointer = &LocalVBuffer[0];
-	s_pEndBufferPointer = s_pBaseBufferPointer + LocalVBuffer.size();
-
-	LocalIBuffer.resize(MAXIBUFFERSIZE);
-
 	CreateDeviceObjects();
 }
 
@@ -138,7 +131,6 @@ void VertexManager::vFlush(bool useDstAlpha)
 {
 	GLVertexFormat *nativeVertexFmt = (GLVertexFormat*)VertexLoaderManager::GetCurrentVertexFormat();
 	u32 stride  = nativeVertexFmt->GetVertexStride();
-	u32 indices = IndexGenerator::GetIndexLen();
 
 	if (m_last_vao != nativeVertexFmt->VAO)
 	{
@@ -148,45 +140,9 @@ void VertexManager::vFlush(bool useDstAlpha)
 
 	PrepareDrawBuffers(stride);
 
-	if (!bpmem.genMode.zfreeze && indices >= 3)
+	if (!bpmem.genMode.zfreeze && IndexGenerator::GetIndexLen() >= 3)
 	{
-		float vtx[9];
-		float out[12];
-
-		// Lookup vertices of the last rendered triangle and software-transform them
-		// This allows us to determine the depth slope, which will be used if zfreeze
-		// is enabled in the following flush.
-		for (unsigned int i = 0; i < 3; ++i)
-		{
-			const int base_index = GetIndexBuffer()[indices - 3 + i];
-			u8* vtx_ptr = &((u8*)GetVertexBuffer())[base_index * stride];
-			vtx[0 + i * 3] = ((float*)vtx_ptr)[0];
-			vtx[1 + i * 3] = ((float*)vtx_ptr)[1];
-			vtx[2 + i * 3] = ((float*)vtx_ptr)[2];
-
-			VertexShaderManager::TransformToClipSpace(&vtx[i * 3], &out[i * 4]);
-
-			// viewport offset ignored because we only look at coordinate differences.
-			out[0 + i * 4] = out[0 + i * 4] / out[3 + i * 4] * xfmem.viewport.wd;
-			out[1 + i * 4] = out[1 + i * 4] / out[3 + i * 4] * xfmem.viewport.ht;
-			out[2 + i * 4] = out[2 + i * 4] / out[3 + i * 4] * xfmem.viewport.zRange + xfmem.viewport.farZ;
-		}
-		float dx31 = out[8] - out[0];
-		float dx12 = out[0] - out[4];
-		float dy12 = out[1] - out[5];
-		float dy31 = out[9] - out[1];
-
-		float DF31 = out[10] - out[2];
-		float DF21 = out[6] - out[2];
-		float a = DF31 * -dy12 - DF21 * dy31;
-		float b = dx31 * DF21 + dx12 * DF31;
-		float c = -dx12 * dy31 - dx31 * -dy12;
-
-		float slope_dfdx = -a / c;
-		float slope_dfdy = -b / c;
-		float slope_f0 = out[2];
-
-		PixelShaderManager::SetZSlopeChanged(slope_dfdx, slope_dfdy, slope_f0);
+		CalculateZSlope(stride);
 	}
 
 	// Makes sure we can actually do Dual source blending