diff options
Diffstat (limited to 'Source/Core/VideoCommon/VertexManagerBase.cpp')
| -rw-r--r-- | Source/Core/VideoCommon/VertexManagerBase.cpp | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/Source/Core/VideoCommon/VertexManagerBase.cpp b/Source/Core/VideoCommon/VertexManagerBase.cpp index bcdaf466a4..23eb770c6d 100644 --- a/Source/Core/VideoCommon/VertexManagerBase.cpp +++ b/Source/Core/VideoCommon/VertexManagerBase.cpp @@ -25,6 +25,8 @@ u8 *VertexManager::s_pEndBufferPointer; PrimitiveType VertexManager::current_primitive_type; +Slope VertexManager::ZSlope; + bool VertexManager::IsFlushed; static const PrimitiveType primitive_from_gx[8] = { @@ -246,6 +248,8 @@ void VertexManager::CalculateZSlope(u32 stride) { float vtx[9]; float out[12]; + float viewOffset[2] = { xfmem.viewport.xOrig - bpmem.scissorOffset.x * 2, + xfmem.viewport.yOrig - bpmem.scissorOffset.y * 2}; // 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 @@ -260,9 +264,11 @@ void VertexManager::CalculateZSlope(u32 stride) VertexShaderManager::TransformToClipSpace(&vtx[i * 3], &out[i * 4]); // Transform to Screenspace - out[0 + i * 4] = out[0 + i * 4] / out[3 + i * 4] * xfmem.viewport.wd + (xfmem.viewport.xOrig - 342); - out[1 + i * 4] = out[1 + i * 4] / out[3 + i * 4] * xfmem.viewport.ht + (xfmem.viewport.yOrig - 342); - out[2 + i * 4] = out[2 + i * 4] / out[3 + i * 4] * xfmem.viewport.zRange + xfmem.viewport.farZ; + float w = out[3 + i * 4]; + + out[0 + i * 4] = out[0 + i * 4] / w * xfmem.viewport.wd + viewOffset[0]; + out[1 + i * 4] = out[1 + i * 4] / w * xfmem.viewport.ht + viewOffset[1]; + out[2 + i * 4] = out[2 + i * 4] / w * xfmem.viewport.zRange + xfmem.viewport.farZ; } float dx31 = out[8] - out[0]; @@ -276,9 +282,11 @@ void VertexManager::CalculateZSlope(u32 stride) 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] - (out[0] * slope_dfdx + out[1] * slope_dfdy); + // Stop divide by zero + if (c == 0) + return; - PixelShaderManager::SetZSlope(slope_dfdx, slope_dfdy, slope_f0); + ZSlope.dfdx = -a / c; + ZSlope.dfdy = -b / c; + ZSlope.f0 = out[2] - (out[0] * ZSlope.dfdx + out[1] * ZSlope.dfdy); } |