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Diffstat (limited to 'src/video_core/texture/etc1.cpp')
-rw-r--r-- | src/video_core/texture/etc1.cpp | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/src/video_core/texture/etc1.cpp b/src/video_core/texture/etc1.cpp deleted file mode 100644 index 43f7f56db..000000000 --- a/src/video_core/texture/etc1.cpp +++ /dev/null @@ -1,122 +0,0 @@ -// Copyright 2017 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include <array> -#include "common/bit_field.h" -#include "common/color.h" -#include "common/common_types.h" -#include "common/math_util.h" -#include "common/vector_math.h" -#include "video_core/texture/etc1.h" - -namespace Pica { -namespace Texture { - -namespace { - -constexpr 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}, -}}; - -union ETC1Tile { - u64 raw; - - // 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(unsigned int x, unsigned 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()); - - int modifier = etc1_modifier_table[table_index][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>(); - } -}; - -} // anonymous namespace - -Math::Vec3<u8> SampleETC1Subtile(u64 value, unsigned int x, unsigned int y) { - ETC1Tile tile{value}; - return tile.GetRGB(x, y); -} - -} // namespace Texture -} // namespace Pica |