From cbea8c74de38dab25a927e6d217878cb8c98fbb4 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Thu, 13 Feb 2020 20:25:28 -0300 Subject: vk_shader_decompiler: Fix vertex id and instance id Vulkan's VertexIndex and InstanceIndex don't match with hardware. This is because Nvidia implements gl_VertexID and gl_InstanceID. The math that relates these is: gl_VertexIndex = gl_BaseVertex + gl_VertexID gl_InstanceIndex = gl_InstanceIndex + gl_InstanceID To emulate it using what Vulkan's SPIR-V offers (the *Index variants) this commit substracts gl_Base* from gl_*Index to obtain the OpenGL and hardware's equivalent. --- src/video_core/renderer_vulkan/vk_shader_decompiler.cpp | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'src') diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp index 24a658dce..f64f5da28 100644 --- a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp +++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp @@ -275,12 +275,14 @@ public: AddCapability(spv::Capability::ImageGatherExtended); AddCapability(spv::Capability::SampledBuffer); AddCapability(spv::Capability::StorageImageWriteWithoutFormat); + AddCapability(spv::Capability::DrawParameters); AddCapability(spv::Capability::SubgroupBallotKHR); AddCapability(spv::Capability::SubgroupVoteKHR); AddExtension("SPV_KHR_shader_ballot"); AddExtension("SPV_KHR_subgroup_vote"); AddExtension("SPV_KHR_storage_buffer_storage_class"); AddExtension("SPV_KHR_variable_pointers"); + AddExtension("SPV_KHR_shader_draw_parameters"); if (ir.UsesViewportIndex()) { AddCapability(spv::Capability::MultiViewport); @@ -492,9 +494,11 @@ private: interfaces.push_back(AddGlobalVariable(Name(out_vertex, "out_vertex"))); // Declare input attributes - vertex_index = DeclareInputBuiltIn(spv::BuiltIn::VertexIndex, t_in_uint, "vertex_index"); + vertex_index = DeclareInputBuiltIn(spv::BuiltIn::VertexIndex, t_in_int, "vertex_index"); instance_index = - DeclareInputBuiltIn(spv::BuiltIn::InstanceIndex, t_in_uint, "instance_index"); + DeclareInputBuiltIn(spv::BuiltIn::InstanceIndex, t_in_int, "instance_index"); + base_vertex = DeclareInputBuiltIn(spv::BuiltIn::BaseVertex, t_in_int, "base_vertex"); + base_instance = DeclareInputBuiltIn(spv::BuiltIn::BaseInstance, t_in_int, "base_instance"); } void DeclareTessControl() { @@ -1068,9 +1072,12 @@ private: return {OpLoad(t_float, AccessElement(t_in_float, tess_coord, element)), Type::Float}; case 2: - return {OpLoad(t_uint, instance_index), Type::Uint}; + return { + OpISub(t_int, OpLoad(t_int, instance_index), OpLoad(t_int, base_instance)), + Type::Int}; case 3: - return {OpLoad(t_uint, vertex_index), Type::Uint}; + return {OpISub(t_int, OpLoad(t_int, vertex_index), OpLoad(t_int, base_vertex)), + Type::Int}; } UNIMPLEMENTED_MSG("Unmanaged TessCoordInstanceIDVertexID element={}", element); return {Constant(t_uint, 0U), Type::Uint}; @@ -2542,6 +2549,8 @@ private: Id instance_index{}; Id vertex_index{}; + Id base_instance{}; + Id base_vertex{}; std::array frag_colors{}; Id frag_depth{}; Id frag_coord{}; -- cgit v1.2.3