diff options
Diffstat (limited to '')
-rw-r--r-- | src/video_core/textures/astc.cpp | 70 | ||||
-rw-r--r-- | src/video_core/textures/astc.h | 70 |
2 files changed, 70 insertions, 70 deletions
diff --git a/src/video_core/textures/astc.cpp b/src/video_core/textures/astc.cpp index 26c19d75b..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, diff --git a/src/video_core/textures/astc.h b/src/video_core/textures/astc.h index 9e148afc4..14d2beec0 100644 --- a/src/video_core/textures/astc.h +++ b/src/video_core/textures/astc.h @@ -9,76 +9,6 @@ namespace Tegra::Texture::ASTC { -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 -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); -} - -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; -} - -constexpr std::array<IntegerEncodedValue, 256> ASTC_ENCODINGS_VALUES = MakeEncodedValues(); - void Decompress(std::span<const uint8_t> data, uint32_t width, uint32_t height, uint32_t depth, uint32_t block_width, uint32_t block_height, std::span<uint8_t> output); |