mirror of https://github.com/PCSX2/pcsx2.git
gsdx-ogl: move blending management into a separate function
This commit is contained in:
Gregory Hainaut
parent
25bd5f5e85
commit
25298c70f7
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@ -313,6 +313,128 @@ bool GSRendererOGL::EmulateTextureShuffleAndFbmask(GSDeviceOGL::PSSelector& ps_s
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return require_barrier;
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}
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bool GSRendererOGL::EmulateBlending(GSDeviceOGL::PSSelector& ps_sel, GSDeviceOGL::OMBlendSelector& om_bsel, GSDeviceOGL::PSConstantBuffer& ps_cb, float afix, bool DATE_GL42)
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{
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const GIFRegALPHA& ALPHA = m_context->ALPHA;
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bool require_barrier = false;
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om_bsel.abe = PRIM->ABE || PRIM->AA1 && m_vt.m_primclass == GS_LINE_CLASS;
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om_bsel.a = ALPHA.A;
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om_bsel.b = ALPHA.B;
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om_bsel.c = ALPHA.C;
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om_bsel.d = ALPHA.D;
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if (m_env.PABE.PABE)
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{
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#ifdef ENABLE_OGL_DEBUG
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fprintf(stderr, "env PABE not supported\n");
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GL_INS("!!! ENV PABE not supported !!!");
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#endif
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// FIXME it could be supported with SW blending!
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if (om_bsel.a == 0 && om_bsel.b == 1 && om_bsel.c == 0 && om_bsel.d == 1)
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{
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// this works because with PABE alpha blending is on when alpha >= 0x80, but since the pixel shader
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// cannot output anything over 0x80 (== 1.0) blending with 0x80 or turning it off gives the same result
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om_bsel.abe = 0;
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}
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else
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{
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//Breath of Fire Dragon Quarter triggers this in battles. Graphics are fine though.
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//ASSERT(0);
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}
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}
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// No blending so early exit
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if (!om_bsel.abe)
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return require_barrier;
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// Compute the blending equation to detect special case
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int blend_sel = ((om_bsel.a * 3 + om_bsel.b) * 3 + om_bsel.c) * 3 + om_bsel.d;
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int blend_flag = GSDeviceOGL::m_blendMapD3D9[blend_sel].bogus;
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// SW Blend is (nearly) free. Let's use it.
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bool free_blend = (blend_flag & NO_BAR) || (m_prim_overlap == PRIM_OVERLAP_NO);
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// We really need SW blending for this one, barely used
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bool impossible_blend = (blend_flag & A_MAX);
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// Do the multiplication in shader for blending accumulation: Cs*As + Cd or Cs*Af + Cd
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bool accumulation_blend = (ALPHA.A == 0 && ALPHA.B == 2 && ALPHA.C != 1 && ALPHA.D == 1);
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bool sw_blending_base = m_sw_blending && (free_blend || impossible_blend || ps_sel.blend_accu);
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// Color clip
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bool acc_colclip_wrap = false;
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if (m_env.COLCLAMP.CLAMP == 0) {
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acc_colclip_wrap = (m_sw_blending >= ACC_BLEND_CCLIP || sw_blending_base);
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if (acc_colclip_wrap) {
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ps_sel.colclip = 3;
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GL_INS("COLCLIP SW ENABLED (blending is %d/%d/%d/%d)", ALPHA.A, ALPHA.B, ALPHA.C, ALPHA.D);
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} else if (!PRIM->TME && PRIM->PRIM != GS_POINTLIST) {
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// Standard (inaccurate) colclip
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ps_sel.colclip = 1;
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accumulation_blend = false;
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GL_INS("COLCLIP ENABLED (blending is %d/%d/%d/%d)", ALPHA.A, ALPHA.B, ALPHA.C, ALPHA.D);
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}
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}
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// Note: Option is duplicated, one impact the blend unit / the other the shader.
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if (accumulation_blend && m_sw_blending) {
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om_bsel.accu = ps_sel.blend_accu = 1;
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sw_blending_base = true;
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}
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bool all_blend_sw;
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switch (m_sw_blending) {
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case ACC_BLEND_ULTRA: all_blend_sw = true; break;
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case ACC_BLEND_FULL: all_blend_sw = !( (ALPHA.A == ALPHA.B) || (ALPHA.C == 2 && afix <= 1.002f) ); break;
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case ACC_BLEND_CCLIP:
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case ACC_BLEND_SPRITE: all_blend_sw = m_vt.m_primclass == GS_SPRITE_CLASS; break;
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default: all_blend_sw = false; break;
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}
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bool sw_blending = sw_blending_base // Free case or Impossible blend
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|| all_blend_sw // all blend
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|| acc_colclip_wrap // accurate colclip
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|| ps_sel.fbmask; // accurate fbmask
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// SW Blending
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// GL42 interact very badly with sw blending. GL42 uses the primitiveID to find the primitive
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// that write the bad alpha value. Sw blending will force the draw to run primitive by primitive
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// (therefore primitiveID will be constant to 1)
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sw_blending &= !DATE_GL42;
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// For stat to optimize accurate option
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#if 0
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GL_INS("BLEND_INFO: %d/%d/%d/%d. Clamp:%d. Prim:%d number %d (sw %d)",
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om_bsel.a, om_bsel.b, om_bsel.c, om_bsel.d, m_env.COLCLAMP.CLAMP, m_vt.m_primclass, m_vertex.next, sw_blending);
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#endif
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if (sw_blending) {
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// select a shader that support blending
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om_bsel.ps = 1;
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ps_sel.blend_a = om_bsel.a;
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ps_sel.blend_b = om_bsel.b;
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ps_sel.blend_c = om_bsel.c;
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ps_sel.blend_d = om_bsel.d;
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// Require the fix alpha vlaue
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if (ALPHA.C == 2) {
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ps_cb.AlphaCoeff.a = afix;
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}
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// No need to flush for every primitive
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require_barrier |= !(blend_flag & NO_BAR) && !ps_sel.blend_accu;
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} else {
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ps_sel.clr1 = om_bsel.IsCLR1();
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if (ps_sel.dfmt == 1 && ALPHA.C == 1) {
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// 24 bits doesn't have an alpha channel so use 1.0f fix factor as equivalent
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om_bsel.c = 2;
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afix = 1.0f;
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}
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}
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return require_barrier;
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}
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GSRendererOGL::PRIM_OVERLAP GSRendererOGL::PrimitiveOverlap()
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{
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// Either 1 triangle or 1 line or 3 POINTs
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@ -464,120 +586,8 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
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float afix = (float)m_context->ALPHA.FIX / 0x80;
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if (!IsOpaque() && rt)
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{
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const GIFRegALPHA& ALPHA = m_context->ALPHA;
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om_bsel.abe = PRIM->ABE || PRIM->AA1 && m_vt.m_primclass == GS_LINE_CLASS;
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om_bsel.a = ALPHA.A;
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om_bsel.b = ALPHA.B;
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om_bsel.c = ALPHA.C;
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om_bsel.d = ALPHA.D;
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if (m_env.PABE.PABE)
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{
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// FIXME it could be supported with SW blending!
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if (om_bsel.a == 0 && om_bsel.b == 1 && om_bsel.c == 0 && om_bsel.d == 1)
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{
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// this works because with PABE alpha blending is on when alpha >= 0x80, but since the pixel shader
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// cannot output anything over 0x80 (== 1.0) blending with 0x80 or turning it off gives the same result
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om_bsel.abe = 0;
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}
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else
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{
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//Breath of Fire Dragon Quarter triggers this in battles. Graphics are fine though.
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//ASSERT(0);
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#ifdef ENABLE_OGL_DEBUG
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fprintf(stderr, "env PABE not supported\n");
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GL_INS("!!! ENV PABE not supported !!!");
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#endif
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}
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}
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// Compute the blending equation to detect special case
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int blend_sel = ((om_bsel.a * 3 + om_bsel.b) * 3 + om_bsel.c) * 3 + om_bsel.d;
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int blend_flag = GSDeviceOGL::m_blendMapD3D9[blend_sel].bogus;
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// SW Blend is (nearly) free. Let's use it.
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bool free_blend = (blend_flag & NO_BAR) || (m_prim_overlap == PRIM_OVERLAP_NO);
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// We really need SW blending for this one, barely used
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bool impossible_blend = (blend_flag & A_MAX);
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// Do the multiplication in shader for blending accumulation: Cs*As + Cd or Cs*Af + Cd
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bool accumulation_blend = (ALPHA.A == 0 && ALPHA.B == 2 && ALPHA.C != 1 && ALPHA.D == 1);
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bool sw_blending_base = m_sw_blending && (free_blend || impossible_blend || ps_sel.blend_accu);
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// Color clip
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bool acc_colclip_wrap = false;
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if (m_env.COLCLAMP.CLAMP == 0) {
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acc_colclip_wrap = (m_sw_blending >= ACC_BLEND_CCLIP || sw_blending_base);
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if (acc_colclip_wrap) {
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ps_sel.colclip = 3;
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GL_INS("COLCLIP SW ENABLED (blending is %d/%d/%d/%d)", ALPHA.A, ALPHA.B, ALPHA.C, ALPHA.D);
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} else if (!PRIM->TME && PRIM->PRIM != GS_POINTLIST) {
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// Standard (inaccurate) colclip
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ps_sel.colclip = 1;
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accumulation_blend = false;
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GL_INS("COLCLIP ENABLED (blending is %d/%d/%d/%d)", ALPHA.A, ALPHA.B, ALPHA.C, ALPHA.D);
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}
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}
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// Note: Option is duplicated, one impact the blend unit / the other the shader.
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if (accumulation_blend && m_sw_blending) {
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om_bsel.accu = ps_sel.blend_accu = 1;
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sw_blending_base = true;
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}
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bool all_blend_sw;
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switch (m_sw_blending) {
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case ACC_BLEND_ULTRA: all_blend_sw = true; break;
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case ACC_BLEND_FULL: all_blend_sw = !( (ALPHA.A == ALPHA.B) || (ALPHA.C == 2 && afix <= 1.002f) ); break;
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case ACC_BLEND_CCLIP:
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case ACC_BLEND_SPRITE: all_blend_sw = m_vt.m_primclass == GS_SPRITE_CLASS; break;
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default: all_blend_sw = false; break;
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}
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bool sw_blending = sw_blending_base // Free case or Impossible blend
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|| all_blend_sw // all blend
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|| acc_colclip_wrap // accurate colclip
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|| ps_sel.fbmask; // accurate fbmask
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// SW Blending
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// GL42 interact very badly with sw blending. GL42 uses the primitiveID to find the primitive
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// that write the bad alpha value. Sw blending will force the draw to run primitive by primitive
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// (therefore primitiveID will be constant to 1)
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sw_blending &= !DATE_GL42;
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// For stat to optimize accurate option
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#if 0
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if (om_bsel.abe)
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GL_INS("BLEND_INFO: %d/%d/%d/%d. Clamp:%d. Prim:%d number %d (sw %d)",
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om_bsel.a, om_bsel.b, om_bsel.c, om_bsel.d, m_env.COLCLAMP.CLAMP, m_vt.m_primclass, m_vertex.next, sw_blending);
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#endif
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if (sw_blending && om_bsel.abe) {
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// select a shader that support blending
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om_bsel.ps = 1;
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ps_sel.blend_a = om_bsel.a;
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ps_sel.blend_b = om_bsel.b;
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ps_sel.blend_c = om_bsel.c;
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ps_sel.blend_d = om_bsel.d;
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// Require the fix alpha vlaue
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if (ALPHA.C == 2) {
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ps_cb.AlphaCoeff.a = afix;
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}
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// No need to flush for every primitive
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require_barrier |= !(blend_flag & NO_BAR) && !ps_sel.blend_accu;
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} else {
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ps_sel.clr1 = om_bsel.IsCLR1();
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if (ps_sel.dfmt == 1 && ALPHA.C == 1) {
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// 24 bits doesn't have an alpha channel so use 1.0f fix factor as equivalent
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om_bsel.c = 2;
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afix = 1.0f;
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}
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}
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if (!IsOpaque() && rt) {
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require_barrier |= EmulateBlending(ps_sel, om_bsel, ps_cb, afix, DATE_GL42);
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}
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if (ps_sel.dfmt == 1) {
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@ -60,6 +60,7 @@ class GSRendererOGL : public GSRendererHW
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void EmulateGS();
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void SetupIA();
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bool EmulateTextureShuffleAndFbmask(GSDeviceOGL::PSSelector& ps_sel, GSDeviceOGL::OMColorMaskSelector& om_csel, GSDeviceOGL::PSConstantBuffer& ps_cb);
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bool EmulateBlending(GSDeviceOGL::PSSelector& ps_sel, GSDeviceOGL::OMBlendSelector& om_bsel, GSDeviceOGL::PSConstantBuffer& ps_cb, float afix, bool DATE_GL42);
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public:
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GSRendererOGL();
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