From f2b74b4fb304dc6b80656a730d3ec3d9f3385b87 Mon Sep 17 00:00:00 2001 From: Tony Wasserka Date: Wed, 31 Dec 2014 14:48:19 +0100 Subject: Pica/Rasterizer: Add ETC1 texture decompression support. --- src/video_core/debug_utils/debug_utils.cpp | 152 ++++++++++++++++++++++++++--- 1 file changed, 140 insertions(+), 12 deletions(-) (limited to 'src/video_core/debug_utils') diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp index a494465b..12f0009b 100644 --- a/src/video_core/debug_utils/debug_utils.cpp +++ b/src/video_core/debug_utils/debug_utils.cpp @@ -18,6 +18,7 @@ #include "common/log.h" #include "common/file_util.h" +#include "common/math_util.h" #include "video_core/color.h" #include "video_core/math.h" @@ -337,25 +338,31 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0 i = (i | (i >> 7)) & 0x3F; - source += coarse_y * info.stride; - const unsigned int offset = coarse_x * block_height + i; + if (info.format != Regs::TextureFormat::ETC1 && + info.format != Regs::TextureFormat::ETC1A4) { + // TODO(neobrain): Fix code design to unify vertical block offsets! + source += coarse_y * info.stride; + } + const unsigned int offset = coarse_x * block_height; + + // TODO: Assert that width/height are multiples of block dimensions switch (info.format) { case Regs::TextureFormat::RGBA8: { - const u8* source_ptr = source + offset * 4; + const u8* source_ptr = source + offset * 4 + i * 4; return { source_ptr[3], source_ptr[2], source_ptr[1], disable_alpha ? (u8)255 : source_ptr[0] }; } case Regs::TextureFormat::RGB8: { - const u8* source_ptr = source + offset * 3; + const u8* source_ptr = source + offset * 3 + i * 3; return { source_ptr[2], source_ptr[1], source_ptr[0], 255 }; } case Regs::TextureFormat::RGBA5551: { - const u16 source_ptr = *(const u16*)(source + offset * 2); + const u16 source_ptr = *(const u16*)(source + offset * 2 + i * 2); u8 r = (source_ptr >> 11) & 0x1F; u8 g = ((source_ptr) >> 6) & 0x1F; u8 b = (source_ptr >> 1) & 0x1F; @@ -366,7 +373,7 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture case Regs::TextureFormat::RGB565: { - const u16 source_ptr = *(const u16*)(source + offset * 2); + const u16 source_ptr = *(const u16*)(source + offset * 2 + i * 2); u8 r = Color::Convert5To8((source_ptr >> 11) & 0x1F); u8 g = Color::Convert6To8(((source_ptr) >> 5) & 0x3F); u8 b = Color::Convert5To8((source_ptr) & 0x1F); @@ -375,7 +382,7 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture case Regs::TextureFormat::RGBA4: { - const u8* source_ptr = source + offset * 2; + const u8* source_ptr = source + offset * 2 + i * 2; u8 r = Color::Convert4To8(source_ptr[1] >> 4); u8 g = Color::Convert4To8(source_ptr[1] & 0xF); u8 b = Color::Convert4To8(source_ptr[0] >> 4); @@ -385,7 +392,7 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture case Regs::TextureFormat::IA8: { - const u8* source_ptr = source + offset * 2; + const u8* source_ptr = source + offset * 2 + i * 2; if (disable_alpha) { // Show intensity as red, alpha as green @@ -397,13 +404,13 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture case Regs::TextureFormat::I8: { - const u8* source_ptr = source + offset; + const u8* source_ptr = source + offset + i; return { *source_ptr, *source_ptr, *source_ptr, 255 }; } case Regs::TextureFormat::A8: { - const u8* source_ptr = source + offset; + const u8* source_ptr = source + offset + i; if (disable_alpha) { return { *source_ptr, *source_ptr, *source_ptr, 255 }; @@ -414,7 +421,7 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture case Regs::TextureFormat::IA4: { - const u8* source_ptr = source + offset; + const u8* source_ptr = source + offset + i; u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4); u8 a = Color::Convert4To8((*source_ptr) & 0xF); @@ -429,7 +436,7 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture case Regs::TextureFormat::A4: { - const u8* source_ptr = source + offset / 2; + const u8* source_ptr = source + offset / 2 + i / 2; u8 a = (coarse_x % 2) ? ((*source_ptr)&0xF) : (((*source_ptr) & 0xF0) >> 4); a = Color::Convert4To8(a); @@ -441,6 +448,127 @@ const Math::Vec4 LookupTexture(const u8* source, int x, int y, const Texture } } + case Regs::TextureFormat::ETC1: + case Regs::TextureFormat::ETC1A4: + { + bool has_alpha = (info.format == Regs::TextureFormat::ETC1A4); + + // ETC1 further subdivides each 8x8 tile into four 4x4 subtiles + const int subtile_width = 4; + const int subtile_height = 4; + + int subtile_index = ((x / subtile_width) & 1) + 2 * ((y / subtile_height) & 1); + unsigned subtile_bytes = has_alpha ? 2 : 1; // TODO: Name... + + const u64* source_ptr = (const u64*)(source + + coarse_x * subtile_bytes * 4 + + coarse_y * subtile_bytes * 4 * (info.width / 8) + + subtile_index * subtile_bytes * 8); + u64 alpha = 0xFFFFFFFFFFFFFFFF; + if (has_alpha) { + alpha = *source_ptr; + source_ptr++; + } + + 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 GetRGB(int x, int y) const { + int texel = 4 * x + y; + + if (flip) + std::swap(x, y); + + // Lookup base value + Math::Vec3 ret; + if (differential_mode) { + ret.r() = differential.r; + ret.g() = differential.g; + ret.b() = differential.b; + if (x >= 2) { + ret.r() += differential.dr; + ret.g() += differential.dg; + ret.b() += 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(separate.r1); + ret.g() = Color::Convert4To8(separate.g1); + ret.b() = Color::Convert4To8(separate.b1); + } else { + ret.r() = Color::Convert4To8(separate.r2); + ret.g() = Color::Convert4To8(separate.g2); + ret.b() = Color::Convert4To8(separate.b2); + } + } + + // Add modifier + unsigned table_index = (x < 2) ? table_index_2.Value() : table_index_1.Value(); + + static const auto etc1_modifier_table = std::array, 8>{{ + { 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(); + } + } const *etc1_tile = reinterpret_cast(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)); + } + default: LOG_ERROR(HW_GPU, "Unknown texture format: %x", (u32)info.format); _dbg_assert_(HW_GPU, 0); -- cgit v1.2.3