diff options
| -rw-r--r-- | src/video_core/textures/astc.cpp | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/src/video_core/textures/astc.cpp b/src/video_core/textures/astc.cpp index 91b4c5d7e..0985cb578 100644 --- a/src/video_core/textures/astc.cpp +++ b/src/video_core/textures/astc.cpp @@ -628,12 +628,14 @@ static void FillError(u32* outBuf, u32 blockWidth, u32 blockHeight) { // Replicates low numBits such that [(toBit - 1):(toBit - 1 - fromBit)] // is the same as [(numBits - 1):0] and repeats all the way down. template <typename IntType> -static IntType Replicate(IntType val, u32 numBits, u32 toBit) { - if (numBits == 0) +static constexpr IntType Replicate(IntType val, u32 numBits, u32 toBit) { + if (numBits == 0) { return 0; - if (toBit == 0) + } + if (toBit == 0) { return 0; - IntType v = val & static_cast<IntType>((1 << numBits) - 1); + } + const IntType v = val & static_cast<IntType>((1 << numBits) - 1); IntType res = v; u32 reslen = numBits; while (reslen < toBit) { @@ -650,6 +652,34 @@ static IntType Replicate(IntType val, u32 numBits, u32 toBit) { return res; } +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>(); +static constexpr u32 ReplicateByteTo16(std::size_t value) { + return REPLICATE_BYTE_TO_16_TABLE[value]; +} + +static constexpr auto REPLICATE_BIT_TO_7_TABLE = MakeReplicateTable<u32, 1, 7>(); +static constexpr u32 ReplicateBitTo7(std::size_t value) { + return REPLICATE_BIT_TO_7_TABLE[value]; +} + +static constexpr auto REPLICATE_BIT_TO_9_TABLE = MakeReplicateTable<u32, 1, 9>(); +static constexpr u32 ReplicateBitTo9(std::size_t value) { + return REPLICATE_BIT_TO_9_TABLE[value]; +} + class Pixel { protected: using ChannelType = s16; @@ -833,7 +863,7 @@ static void DecodeColorValues(u32* out, u8* data, const u32* modes, const u32 nP u32 A = 0, B = 0, C = 0, D = 0; // A is just the lsb replicated 9 times. - A = Replicate(bitval & 1, 1, 9); + A = ReplicateBitTo9(bitval & 1); switch (val.encoding) { // Replicate bits @@ -956,7 +986,7 @@ static u32 UnquantizeTexelWeight(const IntegerEncodedValue& val) { u32 bitval = val.bit_value; u32 bitlen = val.num_bits; - u32 A = Replicate(bitval & 1, 1, 7); + u32 A = ReplicateBitTo7(bitval & 1); u32 B = 0, C = 0, D = 0; u32 result = 0; @@ -1562,9 +1592,9 @@ static void DecompressBlock(const u8 inBuf[16], const u32 blockWidth, const u32 Pixel p; for (u32 c = 0; c < 4; c++) { u32 C0 = endpos32s[partition][0].Component(c); - C0 = Replicate(C0, 8, 16); + C0 = ReplicateByteTo16(C0); u32 C1 = endpos32s[partition][1].Component(c); - C1 = Replicate(C1, 8, 16); + C1 = ReplicateByteTo16(C1); u32 plane = 0; if (weightParams.m_bDualPlane && (((planeIdx + 1) & 3) == c)) { |