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gsdx hw: improve no_ds detection 

Support ZTST_NEVER as no depth read => psx mode speed boost
Use zm/fm to reduce further depth lookup
This commit is contained in:
Gregory Hainaut 2016-09-25 19:00:33 +02:00
parent c3ac3ecbe7
commit 7f4791fa85
1 changed files with 4 additions and 4 deletions
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8
plugins/GSdx/GSRendererHW.cpp
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@ -429,17 +429,17 @@ void GSRendererHW::Draw()
context->ZBUF.ZMSK = zm != 0;
// It is allowed to use the depth and rt at the same location. However at least 1 must
// be disabled.
// be disabled. Or the written value must be the same on both channels.
// 1/ GoW uses a Cd blending on a 24 bits buffer (no alpha)
// 2/ SuperMan really draws (0,0,0,0) color and a (0) 32-bits depth
// 3/ 50cents really draws (0,0,0,128) color and a (0) 24 bits depth
// Note: FF DoC has both buffer at same location but disable the depth test (write?) with ZTE = 0
const bool no_rt = (context->ALPHA.IsCd() && PRIM->ABE && (context->FRAME.PSM == 1));
const bool no_ds = !no_rt && (
// Depth is always pass (no read) and write are discarded (tekken 5). (Note: DATE is currently implemented with a stencil buffer)
(context->ZBUF.ZMSK && m_context->TEST.ZTST == ZTST_ALWAYS && !m_context->TEST.DATE) ||
// Depth is always pass/fail (no read) and write are discarded (tekken 5). (Note: DATE is currently implemented with a stencil buffer => a depth/stencil buffer)
(zm != 0 && m_context->TEST.ZTST <= ZTST_ALWAYS && !m_context->TEST.DATE) ||
// Depth will be written through the RT
(context->FRAME.FBP == context->ZBUF.ZBP && !PRIM->TME && !context->ZBUF.ZMSK && !context->FRAME.FBMSK && context->TEST.ZTE)
(context->FRAME.FBP == context->ZBUF.ZBP && !PRIM->TME && zm == 0 && fm == 0 && context->TEST.ZTE)
);
const bool draw_sprite_tex = PRIM->TME && (m_vt.m_primclass == GS_SPRITE_CLASS);