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swiftshader
Commit e1a50af5 by Nicolas Capens
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Add 6-bit and 5-bit sRGB conversion.

Bug 20891368 Change-Id: I3b7066f20f0e669dc1d3abe9222654318ae3b011 Reviewed-on: https://swiftshader-review.googlesource.com/3114Reviewed-by: 's avatarAlexis Hétu <sugoi@google.com> Reviewed-by: 's avatarNicolas Capens <capn@google.com> Tested-by: 's avatarNicolas Capens <capn@google.com>
parent cfd0e6cc
Showing with 63 additions and 25 deletions
src/Shader/Constants.cpp
......@@ -22,11 +22,6 @@ namespace sw
Constants::Constants()
{
for(int i = 0; i < 256; i++)
{
sRGBtoLinear8[i] = (unsigned short)(sw::sRGBtoLinear((float)i / 0xFF) * 0x1000 + 0.5f);
}
static const unsigned int transposeBit0[16] =
{
0x00000000,
......@@ -266,10 +261,25 @@ namespace sw
invMaskD01X[i][3] = ~-(i >> 1 & 1);
}
for(int i = 0; i < 256; i++)
{
sRGBtoLinear8_12[i] = (unsigned short)(sw::sRGBtoLinear((float)i / 0xFF) * 0x1000 + 0.5f);
}
for(int i = 0; i < 64; i++)
{
sRGBtoLinear6_12[i] = (unsigned short)(sw::sRGBtoLinear((float)i / 0x3F) * 0x1000 + 0.5f);
}
for(int i = 0; i < 32; i++)
{
sRGBtoLinear5_12[i] = (unsigned short)(sw::sRGBtoLinear((float)i / 0x1F) * 0x1000 + 0.5f);
}
for(int i = 0; i < 0x1000; i++)
{
linToSRGB12_16[i] = (unsigned short)(clamp(sw::linearToSRGB((float)i / 0x0FFF) * 0xFFFF + 0.5f, 0.0f, (float)0xFFFF));
sRGBtoLin12_16[i] = (unsigned short)(clamp(sw::sRGBtoLinear((float)i / 0x0FFF) * 0xFFFF + 0.5f, 0.0f, (float)0xFFFF));
linearToSRGB12_16[i] = (unsigned short)(clamp(sw::linearToSRGB((float)i / 0x0FFF) * 0xFFFF + 0.5f, 0.0f, (float)0xFFFF));
sRGBtoLinear12_16[i] = (unsigned short)(clamp(sw::sRGBtoLinear((float)i / 0x0FFF) * 0xFFFF + 0.5f, 0.0f, (float)0xFFFF));
}
for(int q = 0; q < 4; q++)
......
src/Shader/Constants.hpp
......@@ -19,9 +19,7 @@ namespace sw
struct Constants
{
Constants();
unsigned short sRGBtoLinear8[256];
unsigned int transposeBit0[16];
unsigned int transposeBit1[16];
unsigned int transposeBit2[16];
......@@ -67,8 +65,12 @@ namespace sw
dword4 maskD01X[4];
dword4 invMaskD01X[4];
unsigned short linToSRGB12_16[4096];
unsigned short sRGBtoLin12_16[4096];
unsigned short sRGBtoLinear8_12[256];
unsigned short sRGBtoLinear6_12[64];
unsigned short sRGBtoLinear5_12[32];
unsigned short linearToSRGB12_16[4096];
unsigned short sRGBtoLinear12_16[4096];
// Centroid parameters
float4 sampleX[4][16];
......
src/Shader/PixelRoutine.cpp
......@@ -2561,7 +2561,7 @@ namespace sw
if(postBlendSRGB && state.writeSRGB)
{
sRGBtoLinear16_16(r, pixel);
sRGBtoLinear16_12_16(r, pixel);
}
// Final Color = ObjectColor * SourceBlendFactor + PixelColor * DestinationBlendFactor
......@@ -2682,7 +2682,7 @@ namespace sw
if(postBlendSRGB && state.writeSRGB)
{
linearToSRGB16_16(r, current);
linearToSRGB16_12_16(r, current);
}
if(exactColorRounding)
......@@ -4365,7 +4365,7 @@ namespace sw
return Float4(cs) * Float4(1.0f / 0xFFFF);
}
void PixelRoutine::sRGBtoLinear16_16(Registers &r, Vector4s &c)
void PixelRoutine::sRGBtoLinear16_12_16(Registers &r, Vector4s &c)
{
c.x = As<UShort4>(c.x) >> 4;
c.y = As<UShort4>(c.y) >> 4;
......@@ -4376,7 +4376,7 @@ namespace sw
void PixelRoutine::sRGBtoLinear12_16(Registers &r, Vector4s &c)
{
Pointer<Byte> LUT = r.constants + OFFSET(Constants,sRGBtoLin12_16);
Pointer<Byte> LUT = r.constants + OFFSET(Constants,sRGBtoLinear12_16);
c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 0))), 0);
c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 1))), 1);
......@@ -4394,7 +4394,7 @@ namespace sw
c.z = Insert(c.z, *Pointer<Short>(LUT + 2 * Int(Extract(c.z, 3))), 3);
}
void PixelRoutine::linearToSRGB16_16(Registers &r, Vector4s &c)
void PixelRoutine::linearToSRGB16_12_16(Registers &r, Vector4s &c)
{
c.x = As<UShort4>(c.x) >> 4;
c.y = As<UShort4>(c.y) >> 4;
......@@ -4405,7 +4405,7 @@ namespace sw
void PixelRoutine::linearToSRGB12_16(Registers &r, Vector4s &c)
{
Pointer<Byte> LUT = r.constants + OFFSET(Constants,linToSRGB12_16);
Pointer<Byte> LUT = r.constants + OFFSET(Constants,linearToSRGB12_16);
c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 0))), 0);
c.x = Insert(c.x, *Pointer<Short>(LUT + 2 * Int(Extract(c.x, 1))), 1);
......
src/Shader/PixelRoutine.hpp
......@@ -198,9 +198,9 @@ namespace sw
Float4 convertUnsigned16(UShort4 cs);
UShort4 convertFixed16(Float4 &cf, bool saturate = true);
void convertFixed16(Vector4s &cs, Vector4f &cf, bool saturate = true);
void sRGBtoLinear16_16(Registers &r, Vector4s &c);
void sRGBtoLinear16_12_16(Registers &r, Vector4s &c);
void sRGBtoLinear12_16(Registers &r, Vector4s &c);
void linearToSRGB16_16(Registers &r, Vector4s &c);
void linearToSRGB16_12_16(Registers &r, Vector4s &c);
void linearToSRGB12_16(Registers &r, Vector4s &c);
Float4 sRGBtoLinear(const Float4 &x);
Float4 linearToSRGB(const Float4 &x);
......
src/Shader/SamplerCore.cpp
......@@ -110,7 +110,7 @@ namespace sw
{
if(state.sRGB && isRGBComponent(component))
{
sRGBtoLinear16_12(c[component]); // FIXME: Perform linearization at surface level for read-only textures
sRGBtoLinear16_8_12(c[component]); // FIXME: Perform linearization at surface level for read-only textures
}
else
{
......@@ -265,7 +265,7 @@ namespace sw
{
if(state.sRGB && isRGBComponent(component))
{
sRGBtoLinear16_12(cs[component]); // FIXME: Perform linearization at surface level for read-only textures
sRGBtoLinear16_8_12(cs[component]); // FIXME: Perform linearization at surface level for read-only textures
convertSigned12(c[component], cs[component]);
}
else
......@@ -1775,11 +1775,35 @@ namespace sw
cf = Float4(As<UShort4>(cs)) * Float4(1.0f / 0xFFFF);
}
void SamplerCore::sRGBtoLinear16_12(Short4 &c)
void SamplerCore::sRGBtoLinear16_8_12(Short4 &c)
{
c = As<UShort4>(c) >> 8;
Pointer<Byte> LUT = Pointer<Byte>(constants + OFFSET(Constants,sRGBtoLinear8));
Pointer<Byte> LUT = Pointer<Byte>(constants + OFFSET(Constants,sRGBtoLinear8_12));
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 0))), 0);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 1))), 1);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 2))), 2);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 3))), 3);
}
void SamplerCore::sRGBtoLinear16_6_12(Short4 &c)
{
c = As<UShort4>(c) >> 10;
Pointer<Byte> LUT = Pointer<Byte>(constants + OFFSET(Constants,sRGBtoLinear6_12));
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 0))), 0);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 1))), 1);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 2))), 2);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 3))), 3);
}
void SamplerCore::sRGBtoLinear16_5_12(Short4 &c)
{
c = As<UShort4>(c) >> 11;
Pointer<Byte> LUT = Pointer<Byte>(constants + OFFSET(Constants,sRGBtoLinear5_12));
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 0))), 0);
c = Insert(c, *Pointer<Short>(LUT + 2 * Int(Extract(c, 1))), 1);
......
src/Shader/SamplerCore.hpp
......@@ -53,7 +53,9 @@ namespace sw
void convertSigned12(Float4 &cf, Short4 &ci);
void convertSigned15(Float4 &cf, Short4 &ci);
void convertUnsigned16(Float4 &cf, Short4 &ci);
void sRGBtoLinear16_12(Short4 &c);
void sRGBtoLinear16_8_12(Short4 &c);
void sRGBtoLinear16_6_12(Short4 &c);
void sRGBtoLinear16_5_12(Short4 &c);
bool hasFloatTexture() const;
bool hasUnsignedTextureComponent(int component) const;
......
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