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SamplerCore.cpp
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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "SamplerCore.hpp"
#include "Constants.hpp"
#include "Common/Debug.hpp"
namespace
{
void applySwizzle(sw::SwizzleType swizzle, sw::Short4& s, const sw::Vector4s& c)
{
switch(swizzle)
{
case sw::SWIZZLE_RED: s = c.x; break;
case sw::SWIZZLE_GREEN: s = c.y; break;
case sw::SWIZZLE_BLUE: s = c.z; break;
case sw::SWIZZLE_ALPHA: s = c.w; break;
case sw::SWIZZLE_ZERO: s = sw::Short4(0x0000); break;
case sw::SWIZZLE_ONE: s = sw::Short4(0x1000); break;
default: ASSERT(false);
}
}
void applySwizzle(sw::SwizzleType swizzle, sw::Float4& f, const sw::Vector4f& c)
{
switch(swizzle)
{
case sw::SWIZZLE_RED: f = c.x; break;
case sw::SWIZZLE_GREEN: f = c.y; break;
case sw::SWIZZLE_BLUE: f = c.z; break;
case sw::SWIZZLE_ALPHA: f = c.w; break;
case sw::SWIZZLE_ZERO: f = sw::Float4(0.0f, 0.0f, 0.0f, 0.0f); break;
case sw::SWIZZLE_ONE: f = sw::Float4(1.0f, 1.0f, 1.0f, 1.0f); break;
default: ASSERT(false);
}
}
}
namespace sw
{
extern bool colorsDefaultToZero;
SamplerCore::SamplerCore(Pointer<Byte> &constants, const Sampler::State &state) : constants(constants), state(state)
{
}
Vector4s SamplerCore::sampleTexture(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Float4 &bias, Vector4f &dsx, Vector4f &dsy)
{
return sampleTexture(texture, u, v, w, q, q, dsx, dsy, (dsx), Implicit, true);
}
Vector4s SamplerCore::sampleTexture(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Float4 &bias, Vector4f &dsx, Vector4f &dsy, Vector4f &offset, SamplerFunction function, bool fixed12)
{
Vector4s c;
#if PERF_PROFILE
AddAtomic(Pointer<Long>(&profiler.texOperations), 4);
if(state.compressedFormat)
{
AddAtomic(Pointer<Long>(&profiler.compressedTex), 4);
}
#endif
if(state.textureType == TEXTURE_NULL)
{
c.x = Short4(0x0000);
c.y = Short4(0x0000);
c.z = Short4(0x0000);
if(fixed12) // FIXME: Convert to fixed12 at higher level, when required
{
c.w = Short4(0x1000);
}
else
{
c.w = Short4(0xFFFFu); // FIXME
}
}
else
{
Float4 uuuu = u;
Float4 vvvv = v;
Float4 wwww = w;
Float4 qqqq = q;
Int face[4];
Float lod;
Float anisotropy;
Float4 uDelta;
Float4 vDelta;
if(state.textureType != TEXTURE_3D)
{
if(state.textureType != TEXTURE_CUBE)
{
computeLod(texture, lod, anisotropy, uDelta, vDelta, uuuu, vvvv, bias.x, dsx, dsy, function);
}
else
{
Float4 M;
cubeFace(face, uuuu, vvvv, u, v, w, M);
computeLodCube(texture, lod, u, v, w, bias.x, dsx, dsy, M, function);
}
}
else
{
computeLod3D(texture, lod, uuuu, vvvv, wwww, bias.x, dsx, dsy, function);
}
if(!hasFloatTexture())
{
c = sampleFilter(texture, uuuu, vvvv, wwww, offset, lod, anisotropy, uDelta, vDelta, face, function);
}
else
{
Vector4f cf = sampleFloatFilter(texture, uuuu, vvvv, wwww, qqqq, offset, lod, anisotropy, uDelta, vDelta, face, function);
convertFixed12(c, cf);
}
if(fixed12)
{
if(!hasFloatTexture())
{
if(state.textureFormat == FORMAT_R5G6B5)
{
c.x = MulHigh(As<UShort4>(c.x), UShort4(0x10000000 / 0xF800));
c.y = MulHigh(As<UShort4>(c.y), UShort4(0x10000000 / 0xFC00));
c.z = MulHigh(As<UShort4>(c.z), UShort4(0x10000000 / 0xF800));
}
else
{
for(int component = 0; component < textureComponentCount(); component++)
{
if(hasUnsignedTextureComponent(component))
{
c[component] = As<UShort4>(c[component]) >> 4;
}
else
{
c[component] = c[component] >> 3;
}
}
}
}
if(state.textureFilter != FILTER_GATHER)
{
int componentCount = textureComponentCount();
short defaultColorValue = colorsDefaultToZero ? 0x0000 : 0x1000;
switch(state.textureFormat)
{
case FORMAT_R8_SNORM:
case FORMAT_G8R8_SNORM:
case FORMAT_X8B8G8R8_SNORM:
case FORMAT_A8B8G8R8_SNORM:
case FORMAT_R8:
case FORMAT_R5G6B5:
case FORMAT_G8R8:
case FORMAT_R8I:
case FORMAT_R8UI:
case FORMAT_G8R8I:
case FORMAT_G8R8UI:
case FORMAT_X8B8G8R8I:
case FORMAT_X8B8G8R8UI:
case FORMAT_A8B8G8R8I:
case FORMAT_A8B8G8R8UI:
case FORMAT_R16I:
case FORMAT_R16UI:
case FORMAT_G16R16:
case FORMAT_G16R16I:
case FORMAT_G16R16UI:
case FORMAT_X16B16G16R16I:
case FORMAT_X16B16G16R16UI:
case FORMAT_A16B16G16R16:
case FORMAT_A16B16G16R16I:
case FORMAT_A16B16G16R16UI:
case FORMAT_R32I:
case FORMAT_R32UI:
case FORMAT_G32R32I:
case FORMAT_G32R32UI:
case FORMAT_X32B32G32R32I:
case FORMAT_X32B32G32R32UI:
case FORMAT_A32B32G32R32I:
case FORMAT_A32B32G32R32UI:
case FORMAT_X8R8G8B8:
case FORMAT_X8B8G8R8:
case FORMAT_A8R8G8B8:
case FORMAT_A8B8G8R8:
case FORMAT_SRGB8_X8:
case FORMAT_SRGB8_A8:
case FORMAT_V8U8:
case FORMAT_Q8W8V8U8:
case FORMAT_X8L8V8U8:
case FORMAT_V16U16:
case FORMAT_A16W16V16U16:
case FORMAT_Q16W16V16U16:
case FORMAT_YV12_BT601:
case FORMAT_YV12_BT709:
case FORMAT_YV12_JFIF:
if(componentCount < 2) c.y = Short4(defaultColorValue);
if(componentCount < 3) c.z = Short4(defaultColorValue);
if(componentCount < 4) c.w = Short4(0x1000);
break;
case FORMAT_A8:
c.w = c.x;
c.x = Short4(0x0000);
c.y = Short4(0x0000);
c.z = Short4(0x0000);
break;
case FORMAT_L8:
case FORMAT_L16:
c.y = c.x;
c.z = c.x;
c.w = Short4(0x1000);
break;
case FORMAT_A8L8:
c.w = c.y;
c.y = c.x;
c.z = c.x;
break;
case FORMAT_R32F:
c.y = Short4(defaultColorValue);
case FORMAT_G32R32F:
c.z = Short4(defaultColorValue);
case FORMAT_X32B32G32R32F:
case FORMAT_X32B32G32R32F_UNSIGNED:
c.w = Short4(0x1000);
case FORMAT_A32B32G32R32F:
break;
case FORMAT_D32F_LOCKABLE:
case FORMAT_D32FS8_TEXTURE:
case FORMAT_D32F_SHADOW:
case FORMAT_D32FS8_SHADOW:
c.y = c.x;
c.z = c.x;
c.w = c.x;
break;
default:
ASSERT(false);
}
}
if((state.swizzleR != SWIZZLE_RED) ||
(state.swizzleG != SWIZZLE_GREEN) ||
(state.swizzleB != SWIZZLE_BLUE) ||
(state.swizzleA != SWIZZLE_ALPHA))
{
const Vector4s col(c);
applySwizzle(state.swizzleR, c.x, col);
applySwizzle(state.swizzleG, c.y, col);
applySwizzle(state.swizzleB, c.z, col);
applySwizzle(state.swizzleA, c.w, col);
}
}
}
return c;
}
Vector4f SamplerCore::sampleTexture(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Float4 &bias, Vector4f &dsx, Vector4f &dsy, Vector4f &offset, SamplerFunction function)
{
Vector4f c;
#if PERF_PROFILE
AddAtomic(Pointer<Long>(&profiler.texOperations), 4);
if(state.compressedFormat)
{
AddAtomic(Pointer<Long>(&profiler.compressedTex), 4);
}
#endif
if(state.textureType == TEXTURE_NULL)
{
c.x = Float4(0.0f);
c.y = Float4(0.0f);
c.z = Float4(0.0f);
c.w = Float4(1.0f);
}
else
{
// FIXME: YUV is not supported by the floating point path
bool forceFloatFiltering = state.highPrecisionFiltering && !hasYuvFormat() && (state.textureFilter != FILTER_POINT);
bool seamlessCube = (state.addressingModeU == ADDRESSING_SEAMLESS);
bool rectangleTexture = (state.textureType == TEXTURE_RECTANGLE);
if(hasFloatTexture() || hasUnnormalizedIntegerTexture() || forceFloatFiltering || seamlessCube || rectangleTexture) // FIXME: Mostly identical to integer sampling
{
Float4 uuuu = u;
Float4 vvvv = v;
Float4 wwww = w;
Float4 qqqq = q;
Int face[4];
Float lod;
Float anisotropy;
Float4 uDelta;
Float4 vDelta;
if(state.textureType != TEXTURE_3D)
{
if(state.textureType != TEXTURE_CUBE)
{
computeLod(texture, lod, anisotropy, uDelta, vDelta, uuuu, vvvv, bias.x, dsx, dsy, function);
}
else
{
Float4 M;
cubeFace(face, uuuu, vvvv, u, v, w, M);
computeLodCube(texture, lod, u, v, w, bias.x, dsx, dsy, M, function);
}
}
else
{
computeLod3D(texture, lod, uuuu, vvvv, wwww, bias.x, dsx, dsy, function);
}
c = sampleFloatFilter(texture, uuuu, vvvv, wwww, qqqq, offset, lod, anisotropy, uDelta, vDelta, face, function);
if(!hasFloatTexture() && !hasUnnormalizedIntegerTexture())
{
if(has16bitTextureFormat())
{
switch(state.textureFormat)
{
case FORMAT_R5G6B5:
c.x *= Float4(1.0f / 0xF800);
c.y *= Float4(1.0f / 0xFC00);
c.z *= Float4(1.0f / 0xF800);
break;
default:
ASSERT(false);
}
}
else
{
for(int component = 0; component < textureComponentCount(); component++)
{
c[component] *= Float4(hasUnsignedTextureComponent(component) ? 1.0f / 0xFFFF : 1.0f / 0x7FFF);
}
}
}
}
else
{
Vector4s cs = sampleTexture(texture, u, v, w, q, bias, dsx, dsy, offset, function, false);
if(state.textureFormat == FORMAT_R5G6B5)
{
c.x = Float4(As<UShort4>(cs.x)) * Float4(1.0f / 0xF800);
c.y = Float4(As<UShort4>(cs.y)) * Float4(1.0f / 0xFC00);
c.z = Float4(As<UShort4>(cs.z)) * Float4(1.0f / 0xF800);
}
else
{
for(int component = 0; component < textureComponentCount(); component++)
{
if(hasUnsignedTextureComponent(component))
{
convertUnsigned16(c[component], cs[component]);
}
else
{
convertSigned15(c[component], cs[component]);
}
}
}
}
int componentCount = textureComponentCount();
float defaultColorValue = colorsDefaultToZero ? 0.0f : 1.0f;
if(state.textureFilter != FILTER_GATHER)
{
switch(state.textureFormat)
{
case FORMAT_R8I:
case FORMAT_R8UI:
case FORMAT_R16I:
case FORMAT_R16UI:
case FORMAT_R32I:
case FORMAT_R32UI:
c.y = As<Float4>(UInt4(0));
case FORMAT_G8R8I:
case FORMAT_G8R8UI:
case FORMAT_G16R16I:
case FORMAT_G16R16UI:
case FORMAT_G32R32I:
case FORMAT_G32R32UI:
c.z = As<Float4>(UInt4(0));
case FORMAT_X8B8G8R8I:
case FORMAT_X8B8G8R8UI:
case FORMAT_X16B16G16R16I:
case FORMAT_X16B16G16R16UI:
case FORMAT_X32B32G32R32I:
case FORMAT_X32B32G32R32UI:
c.w = As<Float4>(UInt4(1));
case FORMAT_A8B8G8R8I:
case FORMAT_A8B8G8R8UI:
case FORMAT_A16B16G16R16I:
case FORMAT_A16B16G16R16UI:
case FORMAT_A32B32G32R32I:
case FORMAT_A32B32G32R32UI:
break;
case FORMAT_R8_SNORM:
case FORMAT_G8R8_SNORM:
case FORMAT_X8B8G8R8_SNORM:
case FORMAT_A8B8G8R8_SNORM:
case FORMAT_R8:
case FORMAT_R5G6B5:
case FORMAT_G8R8:
case FORMAT_G16R16:
case FORMAT_A16B16G16R16:
case FORMAT_X8R8G8B8:
case FORMAT_X8B8G8R8:
case FORMAT_A8R8G8B8:
case FORMAT_A8B8G8R8:
case FORMAT_SRGB8_X8:
case FORMAT_SRGB8_A8:
case FORMAT_V8U8:
case FORMAT_Q8W8V8U8:
case FORMAT_X8L8V8U8:
case FORMAT_V16U16:
case FORMAT_A16W16V16U16:
case FORMAT_Q16W16V16U16:
case FORMAT_YV12_BT601:
case FORMAT_YV12_BT709:
case FORMAT_YV12_JFIF:
if(componentCount < 2) c.y = Float4(defaultColorValue);
if(componentCount < 3) c.z = Float4(defaultColorValue);
if(componentCount < 4) c.w = Float4(1.0f);
break;
case FORMAT_A8:
c.w = c.x;
c.x = Float4(0.0f);
c.y = Float4(0.0f);
c.z = Float4(0.0f);
break;
case FORMAT_L8:
case FORMAT_L16:
c.y = c.x;
c.z = c.x;
c.w = Float4(1.0f);
break;
case FORMAT_A8L8:
c.w = c.y;
c.y = c.x;
c.z = c.x;
break;
case FORMAT_R32F:
c.y = Float4(defaultColorValue);
case FORMAT_G32R32F:
c.z = Float4(defaultColorValue);
case FORMAT_X32B32G32R32F:
case FORMAT_X32B32G32R32F_UNSIGNED:
c.w = Float4(1.0f);
case FORMAT_A32B32G32R32F:
break;
case FORMAT_D32F_LOCKABLE:
case FORMAT_D32FS8_TEXTURE:
case FORMAT_D32F_SHADOW:
case FORMAT_D32FS8_SHADOW:
c.y = Float4(0.0f);
c.z = Float4(0.0f);
c.w = Float4(1.0f);
break;
default:
ASSERT(false);
}
}
if((state.swizzleR != SWIZZLE_RED) ||
(state.swizzleG != SWIZZLE_GREEN) ||
(state.swizzleB != SWIZZLE_BLUE) ||
(state.swizzleA != SWIZZLE_ALPHA))
{
const Vector4f col(c);
applySwizzle(state.swizzleR, c.x, col);
applySwizzle(state.swizzleG, c.y, col);
applySwizzle(state.swizzleB, c.z, col);
applySwizzle(state.swizzleA, c.w, col);
}
}
return c;
}
Vector4f SamplerCore::textureSize(Pointer<Byte> &texture, Float4 &lod)
{
Vector4f size;
for(int i = 0; i < 4; ++i)
{
Int baseLevel = *Pointer<Int>(texture + OFFSET(Texture, baseLevel));
Pointer<Byte> mipmap = texture + OFFSET(Texture, mipmap) + (As<Int>(Extract(lod, i)) + baseLevel) * sizeof(Mipmap);
size.x = Insert(size.x, As<Float>(Int(*Pointer<Short>(mipmap + OFFSET(Mipmap, width)))), i);
size.y = Insert(size.y, As<Float>(Int(*Pointer<Short>(mipmap + OFFSET(Mipmap, height)))), i);
size.z = Insert(size.z, As<Float>(Int(*Pointer<Short>(mipmap + OFFSET(Mipmap, depth)))), i);
}
return size;
}
void SamplerCore::border(Short4 &mask, Float4 &coordinates)
{
Int4 border = As<Int4>(CmpLT(Abs(coordinates - Float4(0.5f)), Float4(0.5f)));
mask = As<Short4>(Int2(As<Int4>(PackSigned(border, border))));
}
void SamplerCore::border(Int4 &mask, Float4 &coordinates)
{
mask = As<Int4>(CmpLT(Abs(coordinates - Float4(0.5f)), Float4(0.5f)));
}
Short4 SamplerCore::offsetSample(Short4 &uvw, Pointer<Byte> &mipmap, int halfOffset, bool wrap, int count, Float &lod)
{
Short4 offset = *Pointer<Short4>(mipmap + halfOffset);
if(state.textureFilter == FILTER_MIN_LINEAR_MAG_POINT)
{
offset &= Short4(CmpNLE(Float4(lod), Float4(0.0f)));
}
else if(state.textureFilter == FILTER_MIN_POINT_MAG_LINEAR)
{
offset &= Short4(CmpLE(Float4(lod), Float4(0.0f)));
}
if(wrap)
{
switch(count)
{
case -1: return uvw - offset;
case 0: return uvw;
case +1: return uvw + offset;
case 2: return uvw + offset + offset;
}
}
else // Clamp or mirror
{
switch(count)
{
case -1: return SubSat(As<UShort4>(uvw), As<UShort4>(offset));
case 0: return uvw;
case +1: return AddSat(As<UShort4>(uvw), As<UShort4>(offset));
case 2: return AddSat(AddSat(As<UShort4>(uvw), As<UShort4>(offset)), As<UShort4>(offset));
}
}
return uvw;
}
Vector4s SamplerCore::sampleFilter(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], SamplerFunction function)
{
Vector4s c = sampleAniso(texture, u, v, w, offset, lod, anisotropy, uDelta, vDelta, face, false, function);
if(function == Fetch)
{
return c;
}
if(state.mipmapFilter == MIPMAP_LINEAR)
{
Vector4s cc = sampleAniso(texture, u, v, w, offset, lod, anisotropy, uDelta, vDelta, face, true, function);
lod *= Float(1 << 16);
UShort4 utri = UShort4(Float4(lod)); // FIXME: Optimize
Short4 stri = utri >> 1; // FIXME: Optimize
if(hasUnsignedTextureComponent(0)) cc.x = MulHigh(As<UShort4>(cc.x), utri); else cc.x = MulHigh(cc.x, stri);
if(hasUnsignedTextureComponent(1)) cc.y = MulHigh(As<UShort4>(cc.y), utri); else cc.y = MulHigh(cc.y, stri);
if(hasUnsignedTextureComponent(2)) cc.z = MulHigh(As<UShort4>(cc.z), utri); else cc.z = MulHigh(cc.z, stri);
if(hasUnsignedTextureComponent(3)) cc.w = MulHigh(As<UShort4>(cc.w), utri); else cc.w = MulHigh(cc.w, stri);
utri = ~utri;
stri = Short4(0x7FFF) - stri;
if(hasUnsignedTextureComponent(0)) c.x = MulHigh(As<UShort4>(c.x), utri); else c.x = MulHigh(c.x, stri);
if(hasUnsignedTextureComponent(1)) c.y = MulHigh(As<UShort4>(c.y), utri); else c.y = MulHigh(c.y, stri);
if(hasUnsignedTextureComponent(2)) c.z = MulHigh(As<UShort4>(c.z), utri); else c.z = MulHigh(c.z, stri);
if(hasUnsignedTextureComponent(3)) c.w = MulHigh(As<UShort4>(c.w), utri); else c.w = MulHigh(c.w, stri);
c.x += cc.x;
c.y += cc.y;
c.z += cc.z;
c.w += cc.w;
if(!hasUnsignedTextureComponent(0)) c.x += c.x;
if(!hasUnsignedTextureComponent(1)) c.y += c.y;
if(!hasUnsignedTextureComponent(2)) c.z += c.z;
if(!hasUnsignedTextureComponent(3)) c.w += c.w;
}
Short4 borderMask;
if(state.addressingModeU == ADDRESSING_BORDER)
{
Short4 u0;
border(u0, u);
borderMask = u0;
}
if(state.addressingModeV == ADDRESSING_BORDER)
{
Short4 v0;
border(v0, v);
if(state.addressingModeU == ADDRESSING_BORDER)
{
borderMask &= v0;
}
else
{
borderMask = v0;
}
}
if(state.addressingModeW == ADDRESSING_BORDER && state.textureType == TEXTURE_3D)
{
Short4 s0;
border(s0, w);
if(state.addressingModeU == ADDRESSING_BORDER ||
state.addressingModeV == ADDRESSING_BORDER)
{
borderMask &= s0;
}
else
{
borderMask = s0;
}
}
if(state.addressingModeU == ADDRESSING_BORDER ||
state.addressingModeV == ADDRESSING_BORDER ||
(state.addressingModeW == ADDRESSING_BORDER && state.textureType == TEXTURE_3D))
{
Short4 b;
c.x = (borderMask & c.x) | (~borderMask & (*Pointer<Short4>(texture + OFFSET(Texture,borderColor4[0])) >> (hasUnsignedTextureComponent(0) ? 0 : 1)));
c.y = (borderMask & c.y) | (~borderMask & (*Pointer<Short4>(texture + OFFSET(Texture,borderColor4[1])) >> (hasUnsignedTextureComponent(1) ? 0 : 1)));
c.z = (borderMask & c.z) | (~borderMask & (*Pointer<Short4>(texture + OFFSET(Texture,borderColor4[2])) >> (hasUnsignedTextureComponent(2) ? 0 : 1)));
c.w = (borderMask & c.w) | (~borderMask & (*Pointer<Short4>(texture + OFFSET(Texture,borderColor4[3])) >> (hasUnsignedTextureComponent(3) ? 0 : 1)));
}
return c;
}
Vector4s SamplerCore::sampleAniso(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], bool secondLOD, SamplerFunction function)
{
Vector4s c;
if(state.textureFilter != FILTER_ANISOTROPIC || function == Lod || function == Fetch)
{
c = sampleQuad(texture, u, v, w, offset, lod, face, secondLOD, function);
}
else
{
Int a = RoundInt(anisotropy);
Vector4s cSum;
cSum.x = Short4(0);
cSum.y = Short4(0);
cSum.z = Short4(0);
cSum.w = Short4(0);
Float4 A = *Pointer<Float4>(constants + OFFSET(Constants,uvWeight) + 16 * a);
Float4 B = *Pointer<Float4>(constants + OFFSET(Constants,uvStart) + 16 * a);
UShort4 cw = *Pointer<UShort4>(constants + OFFSET(Constants,cWeight) + 8 * a);
Short4 sw = Short4(cw >> 1);
Float4 du = uDelta;
Float4 dv = vDelta;
Float4 u0 = u + B * du;
Float4 v0 = v + B * dv;
du *= A;
dv *= A;
Int i = 0;
Do
{
c = sampleQuad(texture, u0, v0, w, offset, lod, face, secondLOD, function);
u0 += du;
v0 += dv;
if(hasUnsignedTextureComponent(0)) cSum.x += As<Short4>(MulHigh(As<UShort4>(c.x), cw)); else cSum.x += MulHigh(c.x, sw);
if(hasUnsignedTextureComponent(1)) cSum.y += As<Short4>(MulHigh(As<UShort4>(c.y), cw)); else cSum.y += MulHigh(c.y, sw);
if(hasUnsignedTextureComponent(2)) cSum.z += As<Short4>(MulHigh(As<UShort4>(c.z), cw)); else cSum.z += MulHigh(c.z, sw);
if(hasUnsignedTextureComponent(3)) cSum.w += As<Short4>(MulHigh(As<UShort4>(c.w), cw)); else cSum.w += MulHigh(c.w, sw);
i++;
}
Until(i >= a)
if(hasUnsignedTextureComponent(0)) c.x = cSum.x; else c.x = AddSat(cSum.x, cSum.x);
if(hasUnsignedTextureComponent(1)) c.y = cSum.y; else c.y = AddSat(cSum.y, cSum.y);
if(hasUnsignedTextureComponent(2)) c.z = cSum.z; else c.z = AddSat(cSum.z, cSum.z);
if(hasUnsignedTextureComponent(3)) c.w = cSum.w; else c.w = AddSat(cSum.w, cSum.w);
}
return c;
}
Vector4s SamplerCore::sampleQuad(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function)
{
if(state.textureType != TEXTURE_3D)
{
return sampleQuad2D(texture, u, v, w, offset, lod, face, secondLOD, function);
}
else
{
return sample3D(texture, u, v, w, offset, lod, secondLOD, function);
}
}
Vector4s SamplerCore::sampleQuad2D(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function)
{
Vector4s c;
int componentCount = textureComponentCount();
bool gather = state.textureFilter == FILTER_GATHER;
Pointer<Byte> mipmap;
Pointer<Byte> buffer[4];
selectMipmap(texture, buffer, mipmap, lod, face, secondLOD);
bool texelFetch = (function == Fetch);
Short4 uuuu = texelFetch ? Short4(As<Int4>(u)) : address(u, state.addressingModeU, mipmap);
Short4 vvvv = texelFetch ? Short4(As<Int4>(v)) : address(v, state.addressingModeV, mipmap);
Short4 wwww = texelFetch ? Short4(As<Int4>(w)) : address(w, state.addressingModeW, mipmap);
if(state.textureFilter == FILTER_POINT || texelFetch)
{
c = sampleTexel(uuuu, vvvv, wwww, offset, mipmap, buffer, function);
}
else
{
Short4 uuuu0 = offsetSample(uuuu, mipmap, OFFSET(Mipmap,uHalf), state.addressingModeU == ADDRESSING_WRAP, gather ? 0 : -1, lod);
Short4 vvvv0 = offsetSample(vvvv, mipmap, OFFSET(Mipmap,vHalf), state.addressingModeV == ADDRESSING_WRAP, gather ? 0 : -1, lod);
Short4 uuuu1 = offsetSample(uuuu, mipmap, OFFSET(Mipmap,uHalf), state.addressingModeU == ADDRESSING_WRAP, gather ? 2 : +1, lod);
Short4 vvvv1 = offsetSample(vvvv, mipmap, OFFSET(Mipmap,vHalf), state.addressingModeV == ADDRESSING_WRAP, gather ? 2 : +1, lod);
Vector4s c0 = sampleTexel(uuuu0, vvvv0, wwww, offset, mipmap, buffer, function);
Vector4s c1 = sampleTexel(uuuu1, vvvv0, wwww, offset, mipmap, buffer, function);
Vector4s c2 = sampleTexel(uuuu0, vvvv1, wwww, offset, mipmap, buffer, function);
Vector4s c3 = sampleTexel(uuuu1, vvvv1, wwww, offset, mipmap, buffer, function);
if(!gather) // Blend
{
// Fractions
UShort4 f0u = As<UShort4>(uuuu0) * *Pointer<UShort4>(mipmap + OFFSET(Mipmap,width));
UShort4 f0v = As<UShort4>(vvvv0) * *Pointer<UShort4>(mipmap + OFFSET(Mipmap,height));
UShort4 f1u = ~f0u;
UShort4 f1v = ~f0v;
UShort4 f0u0v = MulHigh(f0u, f0v);
UShort4 f1u0v = MulHigh(f1u, f0v);
UShort4 f0u1v = MulHigh(f0u, f1v);
UShort4 f1u1v = MulHigh(f1u, f1v);
// Signed fractions
Short4 f1u1vs;
Short4 f0u1vs;
Short4 f1u0vs;
Short4 f0u0vs;
if(!hasUnsignedTextureComponent(0) || !hasUnsignedTextureComponent(1) || !hasUnsignedTextureComponent(2) || !hasUnsignedTextureComponent(3))
{
f1u1vs = f1u1v >> 1;
f0u1vs = f0u1v >> 1;
f1u0vs = f1u0v >> 1;
f0u0vs = f0u0v >> 1;
}
// Bilinear interpolation
if(componentCount >= 1)
{
if(has16bitTextureComponents() && hasUnsignedTextureComponent(0))
{
c0.x = As<UShort4>(c0.x) - MulHigh(As<UShort4>(c0.x), f0u) + MulHigh(As<UShort4>(c1.x), f0u);
c2.x = As<UShort4>(c2.x) - MulHigh(As<UShort4>(c2.x), f0u) + MulHigh(As<UShort4>(c3.x), f0u);
c.x = As<UShort4>(c0.x) - MulHigh(As<UShort4>(c0.x), f0v) + MulHigh(As<UShort4>(c2.x), f0v);
}
else
{
if(hasUnsignedTextureComponent(0))
{
c0.x = MulHigh(As<UShort4>(c0.x), f1u1v);
c1.x = MulHigh(As<UShort4>(c1.x), f0u1v);
c2.x = MulHigh(As<UShort4>(c2.x), f1u0v);
c3.x = MulHigh(As<UShort4>(c3.x), f0u0v);
}
else
{
c0.x = MulHigh(c0.x, f1u1vs);
c1.x = MulHigh(c1.x, f0u1vs);
c2.x = MulHigh(c2.x, f1u0vs);
c3.x = MulHigh(c3.x, f0u0vs);
}
c.x = (c0.x + c1.x) + (c2.x + c3.x);
if(!hasUnsignedTextureComponent(0)) c.x = AddSat(c.x, c.x); // Correct for signed fractions
}
}
if(componentCount >= 2)
{
if(has16bitTextureComponents() && hasUnsignedTextureComponent(1))
{
c0.y = As<UShort4>(c0.y) - MulHigh(As<UShort4>(c0.y), f0u) + MulHigh(As<UShort4>(c1.y), f0u);
c2.y = As<UShort4>(c2.y) - MulHigh(As<UShort4>(c2.y), f0u) + MulHigh(As<UShort4>(c3.y), f0u);
c.y = As<UShort4>(c0.y) - MulHigh(As<UShort4>(c0.y), f0v) + MulHigh(As<UShort4>(c2.y), f0v);
}
else
{
if(hasUnsignedTextureComponent(1))
{
c0.y = MulHigh(As<UShort4>(c0.y), f1u1v);
c1.y = MulHigh(As<UShort4>(c1.y), f0u1v);
c2.y = MulHigh(As<UShort4>(c2.y), f1u0v);
c3.y = MulHigh(As<UShort4>(c3.y), f0u0v);
}
else
{
c0.y = MulHigh(c0.y, f1u1vs);
c1.y = MulHigh(c1.y, f0u1vs);
c2.y = MulHigh(c2.y, f1u0vs);
c3.y = MulHigh(c3.y, f0u0vs);
}
c.y = (c0.y + c1.y) + (c2.y + c3.y);
if(!hasUnsignedTextureComponent(1)) c.y = AddSat(c.y, c.y); // Correct for signed fractions
}
}
if(componentCount >= 3)
{
if(has16bitTextureComponents() && hasUnsignedTextureComponent(2))
{
c0.z = As<UShort4>(c0.z) - MulHigh(As<UShort4>(c0.z), f0u) + MulHigh(As<UShort4>(c1.z), f0u);
c2.z = As<UShort4>(c2.z) - MulHigh(As<UShort4>(c2.z), f0u) + MulHigh(As<UShort4>(c3.z), f0u);
c.z = As<UShort4>(c0.z) - MulHigh(As<UShort4>(c0.z), f0v) + MulHigh(As<UShort4>(c2.z), f0v);
}
else
{
if(hasUnsignedTextureComponent(2))
{
c0.z = MulHigh(As<UShort4>(c0.z), f1u1v);
c1.z = MulHigh(As<UShort4>(c1.z), f0u1v);
c2.z = MulHigh(As<UShort4>(c2.z), f1u0v);
c3.z = MulHigh(As<UShort4>(c3.z), f0u0v);
}
else
{
c0.z = MulHigh(c0.z, f1u1vs);
c1.z = MulHigh(c1.z, f0u1vs);
c2.z = MulHigh(c2.z, f1u0vs);
c3.z = MulHigh(c3.z, f0u0vs);
}
c.z = (c0.z + c1.z) + (c2.z + c3.z);
if(!hasUnsignedTextureComponent(2)) c.z = AddSat(c.z, c.z); // Correct for signed fractions
}
}
if(componentCount >= 4)
{
if(has16bitTextureComponents() && hasUnsignedTextureComponent(3))
{
c0.w = As<UShort4>(c0.w) - MulHigh(As<UShort4>(c0.w), f0u) + MulHigh(As<UShort4>(c1.w), f0u);
c2.w = As<UShort4>(c2.w) - MulHigh(As<UShort4>(c2.w), f0u) + MulHigh(As<UShort4>(c3.w), f0u);
c.w = As<UShort4>(c0.w) - MulHigh(As<UShort4>(c0.w), f0v) + MulHigh(As<UShort4>(c2.w), f0v);
}
else
{
if(hasUnsignedTextureComponent(3))
{
c0.w = MulHigh(As<UShort4>(c0.w), f1u1v);
c1.w = MulHigh(As<UShort4>(c1.w), f0u1v);
c2.w = MulHigh(As<UShort4>(c2.w), f1u0v);
c3.w = MulHigh(As<UShort4>(c3.w), f0u0v);
}
else
{
c0.w = MulHigh(c0.w, f1u1vs);
c1.w = MulHigh(c1.w, f0u1vs);
c2.w = MulHigh(c2.w, f1u0vs);
c3.w = MulHigh(c3.w, f0u0vs);
}
c.w = (c0.w + c1.w) + (c2.w + c3.w);
if(!hasUnsignedTextureComponent(3)) c.w = AddSat(c.w, c.w); // Correct for signed fractions
}
}
}
else
{
c.x = c1.x;
c.y = c2.x;
c.z = c3.x;
c.w = c0.x;
}
}
return c;
}
Vector4s SamplerCore::sample3D(Pointer<Byte> &texture, Float4 &u_, Float4 &v_, Float4 &w_, Vector4f &offset, Float &lod, bool secondLOD, SamplerFunction function)
{
Vector4s c_;
int componentCount = textureComponentCount();
Pointer<Byte> mipmap;
Pointer<Byte> buffer[4];
Int face[4];
selectMipmap(texture, buffer, mipmap, lod, face, secondLOD);
bool texelFetch = (function == Fetch);
Short4 uuuu = texelFetch ? Short4(As<Int4>(u_)) : address(u_, state.addressingModeU, mipmap);
Short4 vvvv = texelFetch ? Short4(As<Int4>(v_)) : address(v_, state.addressingModeV, mipmap);
Short4 wwww = texelFetch ? Short4(As<Int4>(w_)) : address(w_, state.addressingModeW, mipmap);
if(state.textureFilter == FILTER_POINT || texelFetch)
{
c_ = sampleTexel(uuuu, vvvv, wwww, offset, mipmap, buffer, function);
}
else
{
Vector4s c[2][2][2];
Short4 u[2][2][2];
Short4 v[2][2][2];
Short4 s[2][2][2];
for(int i = 0; i < 2; i++)
{
for(int j = 0; j < 2; j++)
{
for(int k = 0; k < 2; k++)
{
u[i][j][k] = offsetSample(uuuu, mipmap, OFFSET(Mipmap,uHalf), state.addressingModeU == ADDRESSING_WRAP, i * 2 - 1, lod);
v[i][j][k] = offsetSample(vvvv, mipmap, OFFSET(Mipmap,vHalf), state.addressingModeV == ADDRESSING_WRAP, j * 2 - 1, lod);
s[i][j][k] = offsetSample(wwww, mipmap, OFFSET(Mipmap,wHalf), state.addressingModeW == ADDRESSING_WRAP, k * 2 - 1, lod);
}
}
}
// Fractions
UShort4 f0u = As<UShort4>(u[0][0][0]) * *Pointer<UShort4>(mipmap + OFFSET(Mipmap,width));
UShort4 f0v = As<UShort4>(v[0][0][0]) * *Pointer<UShort4>(mipmap + OFFSET(Mipmap,height));
UShort4 f0s = As<UShort4>(s[0][0][0]) * *Pointer<UShort4>(mipmap + OFFSET(Mipmap,depth));
UShort4 f1u = ~f0u;
UShort4 f1v = ~f0v;
UShort4 f1s = ~f0s;
UShort4 f[2][2][2];
Short4 fs[2][2][2];
f[1][1][1] = MulHigh(f1u, f1v);
f[0][1][1] = MulHigh(f0u, f1v);
f[1][0][1] = MulHigh(f1u, f0v);
f[0][0][1] = MulHigh(f0u, f0v);
f[1][1][0] = MulHigh(f1u, f1v);
f[0][1][0] = MulHigh(f0u, f1v);
f[1][0][0] = MulHigh(f1u, f0v);
f[0][0][0] = MulHigh(f0u, f0v);
f[1][1][1] = MulHigh(f[1][1][1], f1s);
f[0][1][1] = MulHigh(f[0][1][1], f1s);
f[1][0][1] = MulHigh(f[1][0][1], f1s);