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author | spholz <44805808+spholz@users.noreply.github.com> | 2021-08-12 22:27:17 +0200 |
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committer | GitHub <noreply@github.com> | 2021-08-12 22:27:17 +0200 |
commit | 78a82495931e8c6b2161f79d2ac00ea88baea4f2 (patch) | |
tree | 94480efdcd09a71e676782434a44d124002f835a /src/video_core/textures/astc.cpp | |
parent | network: correct formatting in network.cpp and network_interface.cpp (diff) | |
parent | Merge pull request #6838 from ameerj/sws-align (diff) | |
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Diffstat (limited to 'src/video_core/textures/astc.cpp')
-rw-r--r-- | src/video_core/textures/astc.cpp | 156 |
1 files changed, 133 insertions, 23 deletions
diff --git a/src/video_core/textures/astc.cpp b/src/video_core/textures/astc.cpp index 3ab500760..25161df1f 100644 --- a/src/video_core/textures/astc.cpp +++ b/src/video_core/textures/astc.cpp @@ -151,6 +151,76 @@ private: const IntType& m_Bits; }; +enum class IntegerEncoding { JustBits, Quint, Trit }; + +struct IntegerEncodedValue { + constexpr IntegerEncodedValue() = default; + + constexpr IntegerEncodedValue(IntegerEncoding encoding_, u32 num_bits_) + : encoding{encoding_}, num_bits{num_bits_} {} + + constexpr bool MatchesEncoding(const IntegerEncodedValue& other) const { + return encoding == other.encoding && num_bits == other.num_bits; + } + + // Returns the number of bits required to encode num_vals values. + u32 GetBitLength(u32 num_vals) const { + u32 total_bits = num_bits * num_vals; + if (encoding == IntegerEncoding::Trit) { + total_bits += (num_vals * 8 + 4) / 5; + } else if (encoding == IntegerEncoding::Quint) { + total_bits += (num_vals * 7 + 2) / 3; + } + return total_bits; + } + + IntegerEncoding encoding{}; + u32 num_bits = 0; + u32 bit_value = 0; + union { + u32 quint_value = 0; + u32 trit_value; + }; +}; + +// Returns a new instance of this struct that corresponds to the +// can take no more than mav_value values +static constexpr IntegerEncodedValue CreateEncoding(u32 mav_value) { + while (mav_value > 0) { + u32 check = mav_value + 1; + + // Is mav_value a power of two? + if (!(check & (check - 1))) { + return IntegerEncodedValue(IntegerEncoding::JustBits, std::popcount(mav_value)); + } + + // Is mav_value of the type 3*2^n - 1? + if ((check % 3 == 0) && !((check / 3) & ((check / 3) - 1))) { + return IntegerEncodedValue(IntegerEncoding::Trit, std::popcount(check / 3 - 1)); + } + + // Is mav_value of the type 5*2^n - 1? + if ((check % 5 == 0) && !((check / 5) & ((check / 5) - 1))) { + return IntegerEncodedValue(IntegerEncoding::Quint, std::popcount(check / 5 - 1)); + } + + // Apparently it can't be represented with a bounded integer sequence... + // just iterate. + mav_value--; + } + return IntegerEncodedValue(IntegerEncoding::JustBits, 0); +} + +static constexpr std::array<IntegerEncodedValue, 256> MakeEncodedValues() { + std::array<IntegerEncodedValue, 256> encodings{}; + for (std::size_t i = 0; i < encodings.size(); ++i) { + encodings[i] = CreateEncoding(static_cast<u32>(i)); + } + return encodings; +} + +static constexpr std::array<IntegerEncodedValue, 256> ASTC_ENCODINGS_VALUES = MakeEncodedValues(); + namespace Tegra::Texture::ASTC { using IntegerEncodedVector = boost::container::static_vector< IntegerEncodedValue, 256, @@ -521,35 +591,41 @@ static TexelWeightParams DecodeBlockInfo(InputBitStream& strm) { return params; } -static void FillVoidExtentLDR(InputBitStream& strm, std::span<u32> outBuf, u32 blockWidth, - u32 blockHeight) { - // Don't actually care about the void extent, just read the bits... - for (s32 i = 0; i < 4; ++i) { - strm.ReadBits<13>(); +// Replicates low num_bits such that [(to_bit - 1):(to_bit - 1 - from_bit)] +// is the same as [(num_bits - 1):0] and repeats all the way down. +template <typename IntType> +static constexpr IntType Replicate(IntType val, u32 num_bits, u32 to_bit) { + if (num_bits == 0 || to_bit == 0) { + return 0; } - - // Decode the RGBA components and renormalize them to the range [0, 255] - u16 r = static_cast<u16>(strm.ReadBits<16>()); - u16 g = static_cast<u16>(strm.ReadBits<16>()); - u16 b = static_cast<u16>(strm.ReadBits<16>()); - u16 a = static_cast<u16>(strm.ReadBits<16>()); - - u32 rgba = (r >> 8) | (g & 0xFF00) | (static_cast<u32>(b) & 0xFF00) << 8 | - (static_cast<u32>(a) & 0xFF00) << 16; - - for (u32 j = 0; j < blockHeight; j++) { - for (u32 i = 0; i < blockWidth; i++) { - outBuf[j * blockWidth + i] = rgba; + const IntType v = val & static_cast<IntType>((1 << num_bits) - 1); + IntType res = v; + u32 reslen = num_bits; + while (reslen < to_bit) { + u32 comp = 0; + if (num_bits > to_bit - reslen) { + u32 newshift = to_bit - reslen; + comp = num_bits - newshift; + num_bits = newshift; } + res = static_cast<IntType>(res << num_bits); + res = static_cast<IntType>(res | (v >> comp)); + reslen += num_bits; } + return res; } -static void FillError(std::span<u32> outBuf, u32 blockWidth, u32 blockHeight) { - for (u32 j = 0; j < blockHeight; j++) { - for (u32 i = 0; i < blockWidth; i++) { - outBuf[j * blockWidth + i] = 0xFFFF00FF; - } +static constexpr std::size_t NumReplicateEntries(u32 num_bits) { + return std::size_t(1) << num_bits; +} + +template <typename IntType, u32 num_bits, u32 to_bit> +static constexpr auto MakeReplicateTable() { + std::array<IntType, NumReplicateEntries(num_bits)> table{}; + for (IntType value = 0; value < static_cast<IntType>(std::size(table)); ++value) { + table[value] = Replicate(value, num_bits, to_bit); } + return table; } static constexpr auto REPLICATE_BYTE_TO_16_TABLE = MakeReplicateTable<u32, 8, 16>(); @@ -572,6 +648,9 @@ static constexpr auto REPLICATE_2_BIT_TO_8_TABLE = MakeReplicateTable<u32, 2, 8> static constexpr auto REPLICATE_3_BIT_TO_8_TABLE = MakeReplicateTable<u32, 3, 8>(); static constexpr auto REPLICATE_4_BIT_TO_8_TABLE = MakeReplicateTable<u32, 4, 8>(); static constexpr auto REPLICATE_5_BIT_TO_8_TABLE = MakeReplicateTable<u32, 5, 8>(); +static constexpr auto REPLICATE_6_BIT_TO_8_TABLE = MakeReplicateTable<u32, 6, 8>(); +static constexpr auto REPLICATE_7_BIT_TO_8_TABLE = MakeReplicateTable<u32, 7, 8>(); +static constexpr auto REPLICATE_8_BIT_TO_8_TABLE = MakeReplicateTable<u32, 8, 8>(); /// Use a precompiled table with the most common usages, if it's not in the expected range, fallback /// to the runtime implementation static constexpr u32 FastReplicateTo8(u32 value, u32 num_bits) { @@ -1316,6 +1395,37 @@ static void ComputeEndpoints(Pixel& ep1, Pixel& ep2, const u32*& colorValues, #undef READ_INT_VALUES } +static void FillVoidExtentLDR(InputBitStream& strm, std::span<u32> outBuf, u32 blockWidth, + u32 blockHeight) { + // Don't actually care about the void extent, just read the bits... + for (s32 i = 0; i < 4; ++i) { + strm.ReadBits<13>(); + } + + // Decode the RGBA components and renormalize them to the range [0, 255] + u16 r = static_cast<u16>(strm.ReadBits<16>()); + u16 g = static_cast<u16>(strm.ReadBits<16>()); + u16 b = static_cast<u16>(strm.ReadBits<16>()); + u16 a = static_cast<u16>(strm.ReadBits<16>()); + + u32 rgba = (r >> 8) | (g & 0xFF00) | (static_cast<u32>(b) & 0xFF00) << 8 | + (static_cast<u32>(a) & 0xFF00) << 16; + + for (u32 j = 0; j < blockHeight; j++) { + for (u32 i = 0; i < blockWidth; i++) { + outBuf[j * blockWidth + i] = rgba; + } + } +} + +static void FillError(std::span<u32> outBuf, u32 blockWidth, u32 blockHeight) { + for (u32 j = 0; j < blockHeight; j++) { + for (u32 i = 0; i < blockWidth; i++) { + outBuf[j * blockWidth + i] = 0xFFFF00FF; + } + } +} + static void DecompressBlock(std::span<const u8, 16> inBuf, const u32 blockWidth, const u32 blockHeight, std::span<u32, 12 * 12> outBuf) { InputBitStream strm(inBuf); |