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Capped sky rendering

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This commit is contained in:
Magnus Norddahl 2016-12-03 06:58:06 +01:00
commit dbacb75617
6 changed files with 56 additions and 28 deletions
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31
tools/drawergen/fixedfunction/drawtrianglecodegen.cpp
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@ -333,8 +333,6 @@ void DrawTriangleCodegen::SetupAffineBlock()
{
AffineVaryingPosX[i] = SSAInt(AffineVaryingPosY[i] * rcpW0, false);
AffineVaryingStepX[i] = (SSAInt((AffineVaryingPosY[i] + gradVaryingX[i]) * rcpW1, false) - AffineVaryingPosX[i]) / q;
AffineVaryingPosX[i] = AffineVaryingPosX[i] << 8;
AffineVaryingStepX[i] = AffineVaryingStepX[i] << 8;
}
}
@ -780,8 +778,8 @@ SSAInt DrawTriangleCodegen::Shade8(SSAInt c)
SSAVec4i DrawTriangleCodegen::ProcessPixel32(SSAVec4i bg, SSAInt *varying)
{
SSAInt ufrac = varying[0];
SSAInt vfrac = varying[1];
SSAInt ufrac = varying[0] << 8;
SSAInt vfrac = varying[1] << 8;
SSAInt upos = ((ufrac >> 16) * textureWidth) >> 16;
SSAInt vpos = ((vfrac >> 16) * textureHeight) >> 16;
@ -848,6 +846,10 @@ SSAVec4i DrawTriangleCodegen::ProcessPixel32(SSAVec4i bg, SSAInt *varying)
fg = Sample32(uvoffset);
output = blend_add_srccolor_oneminussrccolor(shade_bgra_simple(fg, currentlight), bg);
break;
case TriBlendMode::Skycap:
fg = Sample32(uvoffset);
output = FadeOut(varying[1], fg);
break;
}
return output;
@ -867,8 +869,8 @@ SSAInt DrawTriangleCodegen::ToPal8(SSAVec4i c)
SSAInt DrawTriangleCodegen::ProcessPixel8(SSAInt bg, SSAInt *varying)
{
SSAInt ufrac = varying[0];
SSAInt vfrac = varying[1];
SSAInt ufrac = varying[0] << 8;
SSAInt vfrac = varying[1] << 8;
SSAInt upos = ((ufrac >> 16) * textureWidth) >> 16;
SSAInt vpos = ((vfrac >> 16) * textureHeight) >> 16;
@ -955,11 +957,28 @@ SSAInt DrawTriangleCodegen::ProcessPixel8(SSAInt bg, SSAInt *varying)
output = ToPal8(blend_add_srccolor_oneminussrccolor(fg, ToBgra(bg)));
output = (palindex == SSAInt(0)).select(bg, output);
break;
case TriBlendMode::Skycap:
fg = ToBgra(Sample8(uvoffset));
output = ToPal8(FadeOut(varying[1], fg));
break;
}
return output;
}
SSAVec4i DrawTriangleCodegen::FadeOut(SSAInt frac, SSAVec4i fg)
{
int start_fade = 2; // How fast it should fade out
SSAInt alpha_top = SSAInt::MAX(SSAInt::MIN(frac.ashr(16 - start_fade), SSAInt(256)), SSAInt(0));
SSAInt alpha_bottom = SSAInt::MAX(SSAInt::MIN(((2 << 24) - frac).ashr(16 - start_fade), SSAInt(256)), SSAInt(0));
SSAInt alpha = SSAInt::MIN(alpha_top, alpha_bottom);
SSAInt inv_alpha = 256 - alpha;
fg = (fg * alpha + SSAVec4i::unpack(color) * inv_alpha) / 256;
return fg.insert(3, 255);
}
void DrawTriangleCodegen::SetStencilBlock(SSAInt block)
{
StencilBlock = stencilValues[block * 64];