From 657771bdcbe2a35277e8d7e453b00ab21a7f27f0 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Wed, 28 Oct 2020 17:11:24 -0300 Subject: [PATCH] shader: Partially implement texture cube array shadow This implements texture cube arrays with shadow comparisons but doesn't fix the asserts related to it. Fixes out of bounds reads on swizzle constructors and makes them use bounds checked ::at instead of the unsafe operator[]. --- .../renderer_opengl/gl_arb_decompiler.cpp | 41 +++++++++++-------- .../renderer_opengl/gl_shader_decompiler.cpp | 20 +++++---- src/video_core/shader/decode/texture.cpp | 1 - 3 files changed, 37 insertions(+), 25 deletions(-) diff --git a/src/video_core/renderer_opengl/gl_arb_decompiler.cpp b/src/video_core/renderer_opengl/gl_arb_decompiler.cpp index f4db627876..d6120c23e0 100644 --- a/src/video_core/renderer_opengl/gl_arb_decompiler.cpp +++ b/src/video_core/renderer_opengl/gl_arb_decompiler.cpp @@ -39,8 +39,8 @@ using Operation = const OperationNode&; constexpr std::array INTERNAL_FLAG_NAMES = {"ZERO", "SIGN", "CARRY", "OVERFLOW"}; char Swizzle(std::size_t component) { - ASSERT(component < 4); - return component["xyzw"]; + static constexpr std::string_view SWIZZLE{"xyzw"}; + return SWIZZLE.at(component); } constexpr bool IsGenericAttribute(Attribute::Index index) { @@ -224,7 +224,7 @@ private: std::string Visit(const Node& node); - std::pair BuildCoords(Operation); + std::tuple BuildCoords(Operation); std::string BuildAoffi(Operation); std::string GlobalMemoryPointer(const GmemNode& gmem); void Exit(); @@ -1416,12 +1416,12 @@ std::string ARBDecompiler::Visit(const Node& node) { return {}; } -std::pair ARBDecompiler::BuildCoords(Operation operation) { +std::tuple ARBDecompiler::BuildCoords(Operation operation) { const auto& meta = std::get(operation.GetMeta()); UNIMPLEMENTED_IF(meta.sampler.is_indexed); - UNIMPLEMENTED_IF(meta.sampler.is_shadow && meta.sampler.is_array && - meta.sampler.type == Tegra::Shader::TextureType::TextureCube); + const bool is_extended = meta.sampler.is_shadow && meta.sampler.is_array && + meta.sampler.type == Tegra::Shader::TextureType::TextureCube; const std::size_t count = operation.GetOperandsCount(); std::string temporary = AllocVectorTemporary(); std::size_t i = 0; @@ -1429,12 +1429,21 @@ std::pair ARBDecompiler::BuildCoords(Operation operati AddLine("MOV.F {}.{}, {};", temporary, Swizzle(i), Visit(operation[i])); } if (meta.sampler.is_array) { - AddLine("I2F.S {}.{}, {};", temporary, Swizzle(i++), Visit(meta.array)); + AddLine("I2F.S {}.{}, {};", temporary, Swizzle(i), Visit(meta.array)); + ++i; } if (meta.sampler.is_shadow) { - AddLine("MOV.F {}.{}, {};", temporary, Swizzle(i++), Visit(meta.depth_compare)); + std::string compare = Visit(meta.depth_compare); + if (is_extended) { + ASSERT(i == 4); + std::string extra_coord = AllocVectorTemporary(); + AddLine("MOV.F {}.x, {};", extra_coord, compare); + return {fmt::format("{}, {}", temporary, extra_coord), extra_coord, 0}; + } + AddLine("MOV.F {}.{}, {};", temporary, Swizzle(i), compare); + ++i; } - return {std::move(temporary), i}; + return {temporary, temporary, i}; } std::string ARBDecompiler::BuildAoffi(Operation operation) { @@ -1859,7 +1868,7 @@ std::string ARBDecompiler::LogicalAddCarry(Operation operation) { std::string ARBDecompiler::Texture(Operation operation) { const auto& meta = std::get(operation.GetMeta()); const u32 sampler_id = device.GetBaseBindings(stage).sampler + meta.sampler.index; - const auto [temporary, swizzle] = BuildCoords(operation); + const auto [coords, temporary, swizzle] = BuildCoords(operation); std::string_view opcode = "TEX"; std::string extra; @@ -1888,7 +1897,7 @@ std::string ARBDecompiler::Texture(Operation operation) { } } - AddLine("{}.F {}, {},{} texture[{}], {}{};", opcode, temporary, temporary, extra, sampler_id, + AddLine("{}.F {}, {},{} texture[{}], {}{};", opcode, temporary, coords, extra, sampler_id, TextureType(meta), BuildAoffi(operation)); AddLine("MOV.U {}.x, {}.{};", temporary, temporary, Swizzle(meta.element)); return fmt::format("{}.x", temporary); @@ -1897,7 +1906,7 @@ std::string ARBDecompiler::Texture(Operation operation) { std::string ARBDecompiler::TextureGather(Operation operation) { const auto& meta = std::get(operation.GetMeta()); const u32 sampler_id = device.GetBaseBindings(stage).sampler + meta.sampler.index; - const auto [temporary, swizzle] = BuildCoords(operation); + const auto [coords, temporary, swizzle] = BuildCoords(operation); std::string comp; if (!meta.sampler.is_shadow) { @@ -1907,7 +1916,7 @@ std::string ARBDecompiler::TextureGather(Operation operation) { AddLine("TXG.F {}, {}, texture[{}]{}, {}{};", temporary, temporary, sampler_id, comp, TextureType(meta), BuildAoffi(operation)); - AddLine("MOV.U {}.x, {}.{};", temporary, temporary, Swizzle(meta.element)); + AddLine("MOV.U {}.x, {}.{};", temporary, coords, Swizzle(meta.element)); return fmt::format("{}.x", temporary); } @@ -1945,13 +1954,13 @@ std::string ARBDecompiler::TextureQueryLod(Operation operation) { std::string ARBDecompiler::TexelFetch(Operation operation) { const auto& meta = std::get(operation.GetMeta()); const u32 sampler_id = device.GetBaseBindings(stage).sampler + meta.sampler.index; - const auto [temporary, swizzle] = BuildCoords(operation); + const auto [coords, temporary, swizzle] = BuildCoords(operation); if (!meta.sampler.is_buffer) { ASSERT(swizzle < 4); AddLine("MOV.F {}.w, {};", temporary, Visit(meta.lod)); } - AddLine("TXF.F {}, {}, texture[{}], {}{};", temporary, temporary, sampler_id, TextureType(meta), + AddLine("TXF.F {}, {}, texture[{}], {}{};", temporary, coords, sampler_id, TextureType(meta), BuildAoffi(operation)); AddLine("MOV.U {}.x, {}.{};", temporary, temporary, Swizzle(meta.element)); return fmt::format("{}.x", temporary); @@ -1962,7 +1971,7 @@ std::string ARBDecompiler::TextureGradient(Operation operation) { const u32 sampler_id = device.GetBaseBindings(stage).sampler + meta.sampler.index; const std::string ddx = AllocVectorTemporary(); const std::string ddy = AllocVectorTemporary(); - const std::string coord = BuildCoords(operation).first; + const std::string coord = std::get<1>(BuildCoords(operation)); const std::size_t num_components = meta.derivates.size() / 2; for (std::size_t index = 0; index < num_components; ++index) { diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp index bbb8fb0954..95ca96c8eb 100644 --- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp +++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp @@ -2056,15 +2056,19 @@ private: } Expression Texture(Operation operation) { - const auto meta = std::get_if(&operation.GetMeta()); - ASSERT(meta); - - std::string expr = GenerateTexture( - operation, "", {TextureOffset{}, TextureArgument{Type::Float, meta->bias}}); - if (meta->sampler.is_shadow) { - expr = "vec4(" + expr + ')'; + const auto meta = std::get(operation.GetMeta()); + const bool separate_dc = meta.sampler.type == TextureType::TextureCube && + meta.sampler.is_array && meta.sampler.is_shadow; + // TODO: Replace this with an array and make GenerateTexture use C++20 std::span + const std::vector extras{ + TextureOffset{}, + TextureArgument{Type::Float, meta.bias}, + }; + std::string expr = GenerateTexture(operation, "", extras, separate_dc); + if (meta.sampler.is_shadow) { + expr = fmt::format("vec4({})", expr); } - return {expr + GetSwizzle(meta->element), Type::Float}; + return {expr + GetSwizzle(meta.element), Type::Float}; } Expression TextureLod(Operation operation) { diff --git a/src/video_core/shader/decode/texture.cpp b/src/video_core/shader/decode/texture.cpp index 4e932a4b6b..02fdccd86a 100644 --- a/src/video_core/shader/decode/texture.cpp +++ b/src/video_core/shader/decode/texture.cpp @@ -556,7 +556,6 @@ Node4 ShaderIR::GetTextureCode(Instruction instr, TextureType texture_type, const bool is_shadow = depth_compare != nullptr; const bool is_bindless = bindless_reg.has_value(); - UNIMPLEMENTED_IF(texture_type == TextureType::TextureCube && is_array && is_shadow); ASSERT_MSG(texture_type != TextureType::Texture3D || !is_array || !is_shadow, "Illegal texture type");