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gsdx-ogl: accelerate Cd - Cs * Alpha in sw blending 

It is similar as Cd + Cs * Alpha except the operator

It would help to emulate other color clipping case correctly in basic
mode at full speed
This commit is contained in:
Gregory Hainaut 2015-08-16 18:12:34 +02:00
parent 6580f4922f
commit 260c12756a
2 changed files with 15 additions and 8 deletions
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4
plugins/GSdx/GSDeviceOGL.cpp
View File

@ -1596,13 +1596,13 @@ const GSDeviceOGL::OGLBlend GSDeviceOGL::m_blendMapOGL[3*3*3*3 + 1] =
{ BLEND_C_CLR , D3DBLENDOP_ADD , D3DBLEND_DESTCOLOR , D3DBLEND_BLENDFACTOR} , //#1221: (Cd - 0)*F + Cd ==> Cd*(1 + F)
{ 0 , D3DBLENDOP_ADD , D3DBLEND_ZERO , D3DBLEND_BLENDFACTOR} , // 1222: (Cd - 0)*F + 0 ==> Cd*F
{ BLEND_NO_BAR , D3DBLENDOP_ADD , D3DBLEND_INVSRCALPHA , D3DBLEND_ZERO} , // 2000: (0 - Cs)*As + Cs ==> Cs*(1 - As)
{ 0 , D3DBLENDOP_REVSUBTRACT , D3DBLEND_SRCALPHA , D3DBLEND_ONE} , // 2001: (0 - Cs)*As + Cd ==> Cd - Cs*As
{ BLEND_ACCU , D3DBLENDOP_REVSUBTRACT , D3DBLEND_ONE , D3DBLEND_ONE} , // 2001: (0 - Cs)*As + Cd ==> Cd - Cs*As
{ BLEND_NO_BAR , D3DBLENDOP_REVSUBTRACT , D3DBLEND_SRCALPHA , D3DBLEND_ZERO} , // 2002: (0 - Cs)*As + 0 ==> 0 - Cs*As
{ 0 , D3DBLENDOP_ADD , D3DBLEND_INVDESTALPHA , D3DBLEND_ZERO} , // 2010: (0 - Cs)*Ad + Cs ==> Cs*(1 - Ad)
{ 0 , D3DBLENDOP_REVSUBTRACT , D3DBLEND_DESTALPHA , D3DBLEND_ONE} , // 2011: (0 - Cs)*Ad + Cd ==> Cd - Cs*Ad
{ 0 , D3DBLENDOP_REVSUBTRACT , D3DBLEND_DESTALPHA , D3DBLEND_ZERO} , // 2012: (0 - Cs)*Ad + 0 ==> 0 - Cs*Ad
{ BLEND_NO_BAR , D3DBLENDOP_ADD , D3DBLEND_INVBLENDFACTOR , D3DBLEND_ZERO} , // 2020: (0 - Cs)*F + Cs ==> Cs*(1 - F)
{ 0 , D3DBLENDOP_REVSUBTRACT , D3DBLEND_BLENDFACTOR , D3DBLEND_ONE} , // 2021: (0 - Cs)*F + Cd ==> Cd - Cs*F
{ BLEND_ACCU , D3DBLENDOP_REVSUBTRACT , D3DBLEND_ONE , D3DBLEND_ONE} , // 2021: (0 - Cs)*F + Cd ==> Cd - Cs*F
{ BLEND_NO_BAR , D3DBLENDOP_REVSUBTRACT , D3DBLEND_BLENDFACTOR , D3DBLEND_ZERO} , // 2022: (0 - Cs)*F + 0 ==> 0 - Cs*F
{ 0 , D3DBLENDOP_SUBTRACT , D3DBLEND_ONE , D3DBLEND_SRCALPHA} , // 2100: (0 - Cd)*As + Cs ==> Cs - Cd*As
{ 0 , D3DBLENDOP_ADD , D3DBLEND_ZERO , D3DBLEND_INVSRCALPHA} , // 2101: (0 - Cd)*As + Cd ==> Cd*(1 - As)

19
plugins/GSdx/GSRendererOGL.cpp
View File

@ -359,13 +359,20 @@ bool GSRendererOGL::EmulateBlending(GSDeviceOGL::PSSelector& ps_sel, bool DATE_G
// Color clip
if (m_env.COLCLAMP.CLAMP == 0) {
if (accumulation_blend) {
ps_sel.hdr = 1;
GL_INS("COLCLIP Fast HDR mode ENABLED");
} else if (sw_blending) {
if (m_prim_overlap == PRIM_OVERLAP_NO) {
// The fastest algo that requires a single pass
GL_INS("COLCLIP Free mode ENABLED");
ps_sel.colclip = 1;
} else if (accumulation_blend) {
// A fast algo that requires 2 passes
GL_INS("COLCLIP Fast HDR mode ENABLED");
ps_sel.hdr = 1;
} else if (sw_blending) {
// A slow algo that could requires several passes (barely used)
GL_INS("COLCLIP SW ENABLED (blending is %d/%d/%d/%d)", ALPHA.A, ALPHA.B, ALPHA.C, ALPHA.D);
ps_sel.colclip = 1;
} else {
// Speed hack skip previous slow algo
GL_INS("Sorry colclip isn't supported");
}
}
@ -388,9 +395,9 @@ bool GSRendererOGL::EmulateBlending(GSDeviceOGL::PSSelector& ps_sel, bool DATE_G
ps_sel.blend_d = ALPHA.D;
if (accumulation_blend) {
// Keep HW blending to do the addition
// Keep HW blending to do the addition/subtraction
dev->OMSetBlendState(blend_index);
// Remove the addition from the SW blending
// Remove the addition/substraction from the SW blending
ps_sel.blend_d = 2;
} else {
// Disable HW blending