piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-21 05:09:34 -06:00
Code Issues Packages Projects Releases Wiki Activity

Initial port of zfreeze branch (3.5-1729)

Browse Source 
Initial port of original zfreeze branch (3.5-1729) by neobrain into
most recent build of Dolphin.

Makes Rogue Squadron 2 very playable at full speed thanks to recent core
speedups made to Dolphin. Works on DirectX Video plugin only for now.

Enjoy!  and Merry Xmas!!
This commit is contained in:
NanoByte011
2014-12-25 00:34:22 -07:00
committed by Scott Mansell
parent 4984215971
commit 937844b9e3
12 changed files with 173 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
Source/Core/VideoBackends/D3D/VertexManager.cpp
View File

@ -178,9 +178,51 @@ void VertexManager::vFlush(bool useDstAlpha)
}
u32 stride = VertexLoaderManager::GetCurrentVertexFormat()->GetVertexStride();
u32 indices = IndexGenerator::GetIndexLen();
PrepareDrawBuffers(stride);
if (!bpmem.genMode.zfreeze && indices >= 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);
}
VertexLoaderManager::GetCurrentVertexFormat()->SetupVertexPointers();
g_renderer->ApplyState(useDstAlpha);