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swiftshader
Commit e396a499 by Nicolas Capens Committed by Nicolas Capens
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Fix initializing LOD for 3D sampling.

The LOD value was not being computed for 3D texture sampling when no mipmapping is done. We still need the LOD in case the minification and magnification filters differ. Change-Id: If32d7aaf8a92ace33bcc6ca6f0b60fe33c7e771b Reviewed-on: https://swiftshader-review.googlesource.com/15588Tested-by: 's avatarNicolas Capens <nicolascapens@google.com> Reviewed-by: 's avatarAlexis Hétu <sugoi@google.com> Reviewed-by: 's avatarNicolas Capens <nicolascapens@google.com>
parent 5d507bc5
Showing with 56 additions and 64 deletions
src/OpenGL/libGLESv2/utilities.cpp
......@@ -2057,15 +2057,12 @@ namespace es2sw
case GL_NEAREST:
case GL_LINEAR:
return sw::MIPMAP_NONE;
break;
case GL_NEAREST_MIPMAP_NEAREST:
case GL_LINEAR_MIPMAP_NEAREST:
return sw::MIPMAP_POINT;
break;
case GL_NEAREST_MIPMAP_LINEAR:
case GL_LINEAR_MIPMAP_LINEAR:
return sw::MIPMAP_LINEAR;
break;
default:
UNREACHABLE(minFilter);
return sw::MIPMAP_NONE;
......@@ -2079,12 +2076,13 @@ namespace es2sw
return sw::FILTER_ANISOTROPIC;
}
sw::FilterType magFilterType = sw::FILTER_POINT;
switch(magFilter)
{
case GL_NEAREST: magFilterType = sw::FILTER_POINT; break;
case GL_LINEAR: magFilterType = sw::FILTER_LINEAR; break;
default: UNREACHABLE(magFilter);
case GL_NEAREST:
case GL_LINEAR:
break;
default:
UNREACHABLE(magFilter);
}
switch(minFilter)
......@@ -2092,14 +2090,14 @@ namespace es2sw
case GL_NEAREST:
case GL_NEAREST_MIPMAP_NEAREST:
case GL_NEAREST_MIPMAP_LINEAR:
return (magFilterType == sw::FILTER_POINT) ? sw::FILTER_POINT : sw::FILTER_MIN_POINT_MAG_LINEAR;
return (magFilter == GL_NEAREST) ? sw::FILTER_POINT : sw::FILTER_MIN_POINT_MAG_LINEAR;
case GL_LINEAR:
case GL_LINEAR_MIPMAP_NEAREST:
case GL_LINEAR_MIPMAP_LINEAR:
return (magFilterType == sw::FILTER_POINT) ? sw::FILTER_MIN_LINEAR_MAG_POINT : sw::FILTER_LINEAR;
return (magFilter == GL_NEAREST) ? sw::FILTER_MIN_LINEAR_MAG_POINT : sw::FILTER_LINEAR;
default:
UNREACHABLE(minFilter);
return (magFilterType == sw::FILTER_POINT) ? sw::FILTER_POINT : sw::FILTER_MIN_POINT_MAG_LINEAR;
return sw::FILTER_POINT;
}
}
......
src/Shader/SamplerCore.cpp
......@@ -573,7 +573,7 @@ namespace sw
return c;
}
if(state.mipmapFilter > MIPMAP_POINT)
if(state.mipmapFilter == MIPMAP_LINEAR)
{
Vector4s cc = sampleAniso(texture, u, v, w, offset, lod, anisotropy, uDelta, vDelta, face, true, function);
......@@ -1066,7 +1066,7 @@ namespace sw
return c;
}
if(state.mipmapFilter > MIPMAP_POINT)
if(state.mipmapFilter == MIPMAP_LINEAR)
{
Vector4f cc = sampleFloatAniso(texture, u, v, w, q, offset, lod, anisotropy, uDelta, vDelta, face, true, function);
......@@ -1518,67 +1518,61 @@ namespace sw
void SamplerCore::computeLod3D(Pointer<Byte> &texture, Float &lod, Float4 &uuuu, Float4 &vvvv, Float4 &wwww, const Float &lodBias, Vector4f &dsx, Vector4f &dsy, SamplerFunction function)
{
if(state.mipmapFilter == MIPMAP_NONE)
{
}
else // Point and linear filter
if(function != Lod && function != Fetch)
{
if(function != Lod && function != Fetch)
{
Float4 dudxy, dvdxy, dsdxy;
Float4 dudxy, dvdxy, dsdxy;
if(function != Grad) // Implicit
{
dudxy = uuuu - uuuu.xxxx;
dvdxy = vvvv - vvvv.xxxx;
dsdxy = wwww - wwww.xxxx;
}
else
{
dudxy = Float4(dsx.x.xx, dsy.x.xx);
dvdxy = Float4(dsx.y.xx, dsy.y.xx);
dsdxy = Float4(dsx.z.xx, dsy.z.xx);
}
if(function != Grad) // Implicit
{
dudxy = uuuu - uuuu.xxxx;
dvdxy = vvvv - vvvv.xxxx;
dsdxy = wwww - wwww.xxxx;
}
else
{
dudxy = Float4(dsx.x.xx, dsy.x.xx);
dvdxy = Float4(dsx.y.xx, dsy.y.xx);
dsdxy = Float4(dsx.z.xx, dsy.z.xx);
}
// Scale by texture dimensions and global LOD.
dudxy *= *Pointer<Float4>(texture + OFFSET(Texture,widthLOD));
dvdxy *= *Pointer<Float4>(texture + OFFSET(Texture,heightLOD));
dsdxy *= *Pointer<Float4>(texture + OFFSET(Texture,depthLOD));
// Scale by texture dimensions and global LOD.
dudxy *= *Pointer<Float4>(texture + OFFSET(Texture,widthLOD));
dvdxy *= *Pointer<Float4>(texture + OFFSET(Texture,heightLOD));
dsdxy *= *Pointer<Float4>(texture + OFFSET(Texture,depthLOD));
dudxy *= dudxy;
dvdxy *= dvdxy;
dsdxy *= dsdxy;
dudxy *= dudxy;
dvdxy *= dvdxy;
dsdxy *= dsdxy;
dudxy += dvdxy;
dudxy += dsdxy;
dudxy += dvdxy;
dudxy += dsdxy;
lod = Max(Float(dudxy.y), Float(dudxy.z)); // FIXME: Max(dudxy.y, dudxy.z);
lod = Max(Float(dudxy.y), Float(dudxy.z)); // FIXME: Max(dudxy.y, dudxy.z);
lod = log2sqrt(lod); // log2(sqrt(lod))
lod = log2sqrt(lod); // log2(sqrt(lod))
if(function == Bias)
{
lod += lodBias;
}
}
else if(function == Lod)
{
lod = lodBias;
}
else if(function == Fetch)
{
// TODO: Eliminate int-float-int conversion.
lod = Float(As<Int>(lodBias));
}
else if(function == Base)
if(function == Bias)
{
lod = Float(0);
lod += lodBias;
}
else assert(false);
lod = Max(lod, *Pointer<Float>(texture + OFFSET(Texture, minLod)));
lod = Min(lod, *Pointer<Float>(texture + OFFSET(Texture, maxLod)));
}
else if(function == Lod)
{
lod = lodBias;
}
else if(function == Fetch)
{
// TODO: Eliminate int-float-int conversion.
lod = Float(As<Int>(lodBias));
}
else if(function == Base)
{
lod = Float(0);
}
else assert(false);
lod = Max(lod, *Pointer<Float>(texture + OFFSET(Texture, minLod)));
lod = Min(lod, *Pointer<Float>(texture + OFFSET(Texture, maxLod)));
}
void SamplerCore::cubeFace(Int face[4], Float4 &U, Float4 &V, Float4 &x, Float4 &y, Float4 &z, Float4 &M)
......@@ -2240,7 +2234,7 @@ namespace sw
void SamplerCore::selectMipmap(Pointer<Byte> &texture, Pointer<Byte> buffer[4], Pointer<Byte> &mipmap, Float &lod, Int face[4], bool secondLOD)
{
if(state.mipmapFilter < MIPMAP_POINT)
if(state.mipmapFilter == MIPMAP_NONE)
{
mipmap = texture + OFFSET(Texture,mipmap[0]);
}
......@@ -2252,7 +2246,7 @@ namespace sw
{
ilod = RoundInt(lod);
}
else // Linear
else // MIPMAP_LINEAR
{
ilod = Int(lod);
}
......
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