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RSX: Returns texture bias as a float, considering the stored value is a half float.

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This commit is contained in:
Vincent Lejeune 2015-10-25 23:40:02 +01:00
parent 9f49232cac
commit 8afa6e59b2
3 changed files with 18 additions and 3 deletions
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15
Utilities/types.h
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@ -26,6 +26,21 @@ union alignas(2) f16
{
u16 _u16;
u8 _u8[2];
explicit f16(u16 raw)
{
_u16 = raw;
}
explicit operator float() const
{
// See http://stackoverflow.com/a/26779139
// The conversion doesn't handle NaN/Inf
u32 raw = ((_u16 & 0x8000) << 16) | // Sign (just moved)
(((_u16 & 0x7c00) + 0x1C000) << 13) | // Exponent ( exp - 15 + 127)
((_u16 & 0x03FF) << 13); // Mantissa
return (float&)raw;
}
};
using f32 = float;

4
rpcs3/Emu/RSX/RSXTexture.cpp
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@ -144,9 +144,9 @@ namespace rsx
return (method_registers[NV4097_SET_TEXTURE_CONTROL1 + (m_index * 8)]);
}
u16 texture::bias() const
float texture::bias() const
{
return ((method_registers[NV4097_SET_TEXTURE_FILTER + (m_index * 8)]) & 0x1fff);
return float(f16((method_registers[NV4097_SET_TEXTURE_FILTER + (m_index * 8)]) & 0x1fff));
}
u8 texture::min_filter() const

2
rpcs3/Emu/RSX/RSXTexture.h
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@ -44,7 +44,7 @@ namespace rsx
u32 remap() const;
// Filter
u16 bias() const;
float bias() const;
u8 min_filter() const;
u8 mag_filter() const;
u8 convolution_filter() const;