diff options
Diffstat (limited to 'src/video_core/texture/texture_decode.cpp')
| -rw-r--r-- | src/video_core/texture/texture_decode.cpp | 127 |
1 files changed, 17 insertions, 110 deletions
diff --git a/src/video_core/texture/texture_decode.cpp b/src/video_core/texture/texture_decode.cpp index f13d6e577..f611a1aa9 100644 --- a/src/video_core/texture/texture_decode.cpp +++ b/src/video_core/texture/texture_decode.cpp @@ -8,8 +8,10 @@ #include "common/color.h" #include "common/logging/log.h" #include "common/math_util.h" +#include "common/swap.h" #include "common/vector_math.h" #include "video_core/pica.h" +#include "video_core/texture/etc1.h" #include "video_core/texture/texture_decode.h" #include "video_core/utils.h" @@ -177,127 +179,32 @@ Math::Vec4<u8> LookupTexelInTile(const u8* source, unsigned int x, unsigned int case Regs::TextureFormat::ETC1: case Regs::TextureFormat::ETC1A4: { bool has_alpha = (info.format == Regs::TextureFormat::ETC1A4); + size_t subtile_size = has_alpha ? 16 : 8; // ETC1 further subdivides each 8x8 tile into four 4x4 subtiles constexpr unsigned int subtile_width = 4; constexpr unsigned int subtile_height = 4; unsigned int subtile_index = (x / subtile_width) + 2 * (y / subtile_height); - size_t subtile_size = has_alpha ? 16 : 8; + x %= subtile_width; + y %= subtile_height; - // TODO(yuriks): Use memcpy instead of reinterpret_cast - const u64* source_ptr = reinterpret_cast<const u64*>(source + subtile_index * subtile_size); + const u8* subtile_ptr = source + subtile_index * subtile_size; - u64 alpha = 0xFFFFFFFFFFFFFFFF; + u8 alpha = 255; if (has_alpha) { - alpha = *source_ptr; - source_ptr++; + u64_le packed_alpha; + memcpy(&packed_alpha, subtile_ptr, sizeof(u64)); + subtile_ptr += sizeof(u64); + + alpha = Color::Convert4To8((packed_alpha >> (4 * (x * subtile_width + y))) & 0xF); } - union ETC1Tile { - // Each of these two is a collection of 16 bits (one per lookup value) - BitField<0, 16, u64> table_subindexes; - BitField<16, 16, u64> negation_flags; - - unsigned GetTableSubIndex(unsigned index) const { - return (table_subindexes >> index) & 1; - } - - bool GetNegationFlag(unsigned index) const { - return ((negation_flags >> index) & 1) == 1; - } - - BitField<32, 1, u64> flip; - BitField<33, 1, u64> differential_mode; - - BitField<34, 3, u64> table_index_2; - BitField<37, 3, u64> table_index_1; - - union { - // delta value + base value - BitField<40, 3, s64> db; - BitField<43, 5, u64> b; - - BitField<48, 3, s64> dg; - BitField<51, 5, u64> g; - - BitField<56, 3, s64> dr; - BitField<59, 5, u64> r; - } differential; - - union { - BitField<40, 4, u64> b2; - BitField<44, 4, u64> b1; - - BitField<48, 4, u64> g2; - BitField<52, 4, u64> g1; - - BitField<56, 4, u64> r2; - BitField<60, 4, u64> r1; - } separate; - - const Math::Vec3<u8> GetRGB(int x, int y) const { - int texel = 4 * x + y; - - if (flip) - std::swap(x, y); - - // Lookup base value - Math::Vec3<int> ret; - if (differential_mode) { - ret.r() = static_cast<int>(differential.r); - ret.g() = static_cast<int>(differential.g); - ret.b() = static_cast<int>(differential.b); - if (x >= 2) { - ret.r() += static_cast<int>(differential.dr); - ret.g() += static_cast<int>(differential.dg); - ret.b() += static_cast<int>(differential.db); - } - ret.r() = Color::Convert5To8(ret.r()); - ret.g() = Color::Convert5To8(ret.g()); - ret.b() = Color::Convert5To8(ret.b()); - } else { - if (x < 2) { - ret.r() = Color::Convert4To8(static_cast<u8>(separate.r1)); - ret.g() = Color::Convert4To8(static_cast<u8>(separate.g1)); - ret.b() = Color::Convert4To8(static_cast<u8>(separate.b1)); - } else { - ret.r() = Color::Convert4To8(static_cast<u8>(separate.r2)); - ret.g() = Color::Convert4To8(static_cast<u8>(separate.g2)); - ret.b() = Color::Convert4To8(static_cast<u8>(separate.b2)); - } - } - - // Add modifier - unsigned table_index = - static_cast<int>((x < 2) ? table_index_1.Value() : table_index_2.Value()); - - static const std::array<std::array<u8, 2>, 8> etc1_modifier_table = {{ - {{2, 8}}, - {{5, 17}}, - {{9, 29}}, - {{13, 42}}, - {{18, 60}}, - {{24, 80}}, - {{33, 106}}, - {{47, 183}}, - }}; - - int modifier = etc1_modifier_table.at(table_index).at(GetTableSubIndex(texel)); - if (GetNegationFlag(texel)) - modifier *= -1; - - ret.r() = MathUtil::Clamp(ret.r() + modifier, 0, 255); - ret.g() = MathUtil::Clamp(ret.g() + modifier, 0, 255); - ret.b() = MathUtil::Clamp(ret.b() + modifier, 0, 255); - - return ret.Cast<u8>(); - } - } const* etc1_tile = reinterpret_cast<const ETC1Tile*>(source_ptr); - - alpha >>= 4 * ((x & 3) * 4 + (y & 3)); - return Math::MakeVec(etc1_tile->GetRGB(x & 3, y & 3), - disable_alpha ? (u8)255 : Color::Convert4To8(alpha & 0xF)); + u64_le subtile_data; + memcpy(&subtile_data, subtile_ptr, sizeof(u64)); + + return Math::MakeVec(SampleETC1Subtile(subtile_data, x, y), + disable_alpha ? (u8)255 : alpha); } default: |