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a14c88ba67
Yellow squiggly lines begone! Done automatically on .cpp files through `run-clang-tidy`, with manual corrections to the mistakes. If an import is directly used, but is technically unnecessary since it's recursively imported by something else, it is *not* removed. The tool doesn't touch .h files, so I did some of them by hand while fixing errors due to old recursive imports. Not everything is removed, but the cleanup should be substantial enough. Because this done on Linux, code that isn't used on it is mostly untouched. (Hopefully no open PR is depending on these imports...)
394 lines
14 KiB
C++
394 lines
14 KiB
C++
// Copyright 2014 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "VideoCommon/GeometryShaderGen.h"
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#include "Common/CommonTypes.h"
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#include "Common/EnumMap.h"
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#include "VideoCommon/DriverDetails.h"
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#include "VideoCommon/LightingShaderGen.h"
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#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/VideoConfig.h"
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#include "VideoCommon/XFMemory.h"
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constexpr Common::EnumMap<const char*, PrimitiveType::TriangleStrip> primitives_ogl{
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"points",
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"lines",
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"triangles",
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"triangles",
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};
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constexpr Common::EnumMap<const char*, PrimitiveType::TriangleStrip> primitives_d3d{
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"point",
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"line",
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"triangle",
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"triangle",
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};
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constexpr Common::EnumMap<u32, PrimitiveType::TriangleStrip> vertex_in_map{1u, 2u, 3u, 3u};
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constexpr Common::EnumMap<u32, PrimitiveType::TriangleStrip> vertex_out_map{4u, 4u, 4u, 3u};
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bool geometry_shader_uid_data::IsPassthrough() const
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{
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const bool stereo = g_ActiveConfig.stereo_mode != StereoMode::Off;
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const bool wireframe = g_ActiveConfig.bWireFrame;
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return primitive_type >= static_cast<u32>(PrimitiveType::Triangles) && !stereo && !wireframe;
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}
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GeometryShaderUid GetGeometryShaderUid(PrimitiveType primitive_type)
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{
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GeometryShaderUid out;
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geometry_shader_uid_data* const uid_data = out.GetUidData();
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uid_data->primitive_type = static_cast<u32>(primitive_type);
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uid_data->numTexGens = xfmem.numTexGen.numTexGens;
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return out;
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}
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static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
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const geometry_shader_uid_data* uid_data, const char* vertex,
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APIType api_type, bool wireframe, bool stereo, bool first_vertex = false);
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static void EndPrimitive(ShaderCode& out, const ShaderHostConfig& host_config,
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const geometry_shader_uid_data* uid_data, APIType api_type, bool wireframe,
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bool stereo);
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ShaderCode GenerateGeometryShaderCode(APIType api_type, const ShaderHostConfig& host_config,
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const geometry_shader_uid_data* uid_data)
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{
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ShaderCode out;
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// Non-uid template parameters will write to the dummy data (=> gets optimized out)
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const bool wireframe = host_config.wireframe;
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const bool msaa = host_config.msaa;
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const bool ssaa = host_config.ssaa;
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const bool stereo = host_config.stereo;
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const auto primitive_type = static_cast<PrimitiveType>(uid_data->primitive_type);
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const u32 vertex_in = vertex_in_map[primitive_type];
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u32 vertex_out = vertex_out_map[primitive_type];
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if (wireframe)
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vertex_out++;
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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// Insert layout parameters
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if (host_config.backend_gs_instancing)
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{
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out.Write("layout({}, invocations = {}) in;\n", primitives_ogl[primitive_type],
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stereo ? 2 : 1);
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out.Write("layout({}_strip, max_vertices = {}) out;\n", wireframe ? "line" : "triangle",
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vertex_out);
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}
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else
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{
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out.Write("layout({}) in;\n", primitives_ogl[primitive_type]);
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out.Write("layout({}_strip, max_vertices = {}) out;\n", wireframe ? "line" : "triangle",
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stereo ? vertex_out * 2 : vertex_out);
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}
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}
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out.Write("{}", s_lighting_struct);
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// uniforms
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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out.Write("UBO_BINDING(std140, 4) uniform GSBlock {{\n");
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else
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out.Write("cbuffer GSBlock {{\n");
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out.Write("{}", s_geometry_shader_uniforms);
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out.Write("}};\n");
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out.Write("struct VS_OUTPUT {{\n");
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GenerateVSOutputMembers(out, api_type, uid_data->numTexGens, host_config, "",
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ShaderStage::Geometry);
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out.Write("}};\n");
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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if (host_config.backend_gs_instancing)
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out.Write("#define InstanceID gl_InvocationID\n");
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out.Write("VARYING_LOCATION(0) in VertexData {{\n");
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GenerateVSOutputMembers(out, api_type, uid_data->numTexGens, host_config,
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GetInterpolationQualifier(msaa, ssaa, true, true),
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ShaderStage::Geometry);
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out.Write("}} vs[{}];\n", vertex_in);
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out.Write("VARYING_LOCATION(0) out VertexData {{\n");
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GenerateVSOutputMembers(out, api_type, uid_data->numTexGens, host_config,
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GetInterpolationQualifier(msaa, ssaa, true, false),
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ShaderStage::Geometry);
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out.Write("}} ps;\n");
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if (stereo && !host_config.backend_gl_layer_in_fs)
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out.Write("flat out int layer;");
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out.Write("void main()\n{{\n");
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}
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else // D3D
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{
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out.Write("struct VertexData {{\n");
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out.Write("\tVS_OUTPUT o;\n");
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if (stereo)
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{
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out.Write("\tuint layer : SV_RenderTargetArrayIndex;\n");
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}
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out.Write("\tfloat4 posout : SV_Position;\n");
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out.Write("}};\n");
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if (host_config.backend_gs_instancing)
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{
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out.Write("[maxvertexcount({})]\n[instance({})]\n", vertex_out, stereo ? 2 : 1);
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out.Write("void main({} VS_OUTPUT o[{}], inout {}Stream<VertexData> output, in uint "
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"InstanceID : SV_GSInstanceID)\n{{\n",
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primitives_d3d[primitive_type], vertex_in, wireframe ? "Line" : "Triangle");
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}
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else
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{
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out.Write("[maxvertexcount({})]\n", stereo ? vertex_out * 2 : vertex_out);
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out.Write("void main({} VS_OUTPUT o[{}], inout {}Stream<VertexData> output)\n{{\n",
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primitives_d3d[primitive_type], vertex_in, wireframe ? "Line" : "Triangle");
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}
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out.Write("\tVertexData ps;\n");
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}
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if (primitive_type == PrimitiveType::Lines)
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{
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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out.Write("\tVS_OUTPUT start, end;\n");
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AssignVSOutputMembers(out, "start", "vs[0]", uid_data->numTexGens, host_config);
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AssignVSOutputMembers(out, "end", "vs[1]", uid_data->numTexGens, host_config);
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}
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else
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{
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out.Write("\tVS_OUTPUT start = o[0];\n"
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"\tVS_OUTPUT end = o[1];\n");
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}
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GenerateLineOffset(out, "\t", "\t\t", "end.pos", "start.pos", "");
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}
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else if (primitive_type == PrimitiveType::Points)
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{
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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out.Write("\tVS_OUTPUT center;\n");
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AssignVSOutputMembers(out, "center", "vs[0]", uid_data->numTexGens, host_config);
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}
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else
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{
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out.Write("\tVS_OUTPUT center = o[0];\n");
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}
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// Offset from center to upper right vertex
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// Lerp PointSize/2 from [0,0..VpWidth,VpHeight] to [-1,1..1,-1]
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out.Write("\tfloat2 offset = float2(" I_LINEPTPARAMS ".w / " I_LINEPTPARAMS
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".x, -" I_LINEPTPARAMS ".w / " I_LINEPTPARAMS ".y) * center.pos.w;\n");
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}
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if (stereo)
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{
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// If the GPU supports invocation we don't need a for loop and can simply use the
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// invocation identifier to determine which layer we're rendering.
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if (host_config.backend_gs_instancing)
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out.Write("\tint eye = InstanceID;\n");
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else
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out.Write("\tfor (int eye = 0; eye < 2; ++eye) {{\n");
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}
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if (wireframe)
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out.Write("\tVS_OUTPUT first;\n");
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// Avoid D3D warning about forced unrolling of single-iteration loop
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if (vertex_in > 1)
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out.Write("\tfor (int i = 0; i < {}; ++i) {{\n", vertex_in);
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else
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out.Write("\tint i = 0;\n");
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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out.Write("\tVS_OUTPUT f;\n");
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AssignVSOutputMembers(out, "f", "vs[i]", uid_data->numTexGens, host_config);
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if (host_config.backend_depth_clamp &&
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DriverDetails::HasBug(DriverDetails::BUG_BROKEN_CLIP_DISTANCE))
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{
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// On certain GPUs we have to consume the clip distance from the vertex shader
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// or else the other vertex shader outputs will get corrupted.
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out.Write("\tf.clipDist0 = gl_in[i].gl_ClipDistance[0];\n"
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"\tf.clipDist1 = gl_in[i].gl_ClipDistance[1];\n");
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}
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}
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else
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{
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out.Write("\tVS_OUTPUT f = o[i];\n");
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}
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if (stereo)
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{
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// For stereoscopy add a small horizontal offset in Normalized Device Coordinates proportional
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// to the depth of the vertex. We retrieve the depth value from the w-component of the projected
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// vertex which contains the negated z-component of the original vertex.
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// For negative parallax (out-of-screen effects) we subtract a convergence value from
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// the depth value. This results in objects at a distance smaller than the convergence
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// distance to seemingly appear in front of the screen.
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// This formula is based on page 13 of the "Nvidia 3D Vision Automatic, Best Practices Guide"
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out.Write("\tfloat hoffset = (eye == 0) ? " I_STEREOPARAMS ".x : " I_STEREOPARAMS ".y;\n");
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out.Write("\tf.pos.x += hoffset * (f.pos.w - " I_STEREOPARAMS ".z);\n");
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}
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if (primitive_type == PrimitiveType::Lines)
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{
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out.Write("\tVS_OUTPUT l = f;\n"
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"\tVS_OUTPUT r = f;\n");
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out.Write("\tl.pos.xy -= offset * l.pos.w;\n"
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"\tr.pos.xy += offset * r.pos.w;\n");
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out.Write("\tif (" I_TEXOFFSET "[2] != 0) {{\n");
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out.Write("\tfloat texOffset = 1.0 / float(" I_TEXOFFSET "[2]);\n");
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for (u32 i = 0; i < uid_data->numTexGens; ++i)
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{
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out.Write("\tif (((" I_TEXOFFSET "[0] >> {}) & 0x1) != 0)\n", i);
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out.Write("\t\tr.tex{}.x += texOffset;\n", i);
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}
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out.Write("\t}}\n");
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EmitVertex(out, host_config, uid_data, "l", api_type, wireframe, stereo, true);
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EmitVertex(out, host_config, uid_data, "r", api_type, wireframe, stereo);
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}
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else if (primitive_type == PrimitiveType::Points)
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{
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out.Write("\tVS_OUTPUT ll = f;\n"
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"\tVS_OUTPUT lr = f;\n"
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"\tVS_OUTPUT ul = f;\n"
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"\tVS_OUTPUT ur = f;\n");
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out.Write("\tll.pos.xy += float2(-1,-1) * offset;\n"
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"\tlr.pos.xy += float2(1,-1) * offset;\n"
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"\tul.pos.xy += float2(-1,1) * offset;\n"
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"\tur.pos.xy += offset;\n");
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out.Write("\tif (" I_TEXOFFSET "[3] != 0) {{\n");
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out.Write("\tfloat2 texOffset = float2(1.0 / float(" I_TEXOFFSET
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"[3]), 1.0 / float(" I_TEXOFFSET "[3]));\n");
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for (u32 i = 0; i < uid_data->numTexGens; ++i)
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{
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out.Write("\tif (((" I_TEXOFFSET "[1] >> {}) & 0x1) != 0) {{\n", i);
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out.Write("\t\tul.tex{}.xy += float2(0,1) * texOffset;\n", i);
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out.Write("\t\tur.tex{}.xy += texOffset;\n", i);
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out.Write("\t\tlr.tex{}.xy += float2(1,0) * texOffset;\n", i);
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out.Write("\t}}\n");
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}
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out.Write("\t}}\n");
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EmitVertex(out, host_config, uid_data, "ll", api_type, wireframe, stereo, true);
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EmitVertex(out, host_config, uid_data, "lr", api_type, wireframe, stereo);
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EmitVertex(out, host_config, uid_data, "ul", api_type, wireframe, stereo);
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EmitVertex(out, host_config, uid_data, "ur", api_type, wireframe, stereo);
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}
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else
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{
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EmitVertex(out, host_config, uid_data, "f", api_type, wireframe, stereo, true);
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}
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// Only close loop if previous code was in one (See D3D warning above)
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if (vertex_in > 1)
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out.Write("\t}}\n");
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EndPrimitive(out, host_config, uid_data, api_type, wireframe, stereo);
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if (stereo && !host_config.backend_gs_instancing)
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out.Write("\t}}\n");
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out.Write("}}\n");
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return out;
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}
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static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
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const geometry_shader_uid_data* uid_data, const char* vertex,
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APIType api_type, bool wireframe, bool stereo, bool first_vertex)
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{
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if (wireframe && first_vertex)
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out.Write("\tif (i == 0) first = {};\n", vertex);
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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// Vulkan NDC space has Y pointing down (right-handed NDC space).
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if (api_type == APIType::Vulkan)
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out.Write("\tgl_Position = float4({0}.pos.x, -{0}.pos.y, {0}.pos.z, {0}.pos.w);\n", vertex);
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else
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out.Write("\tgl_Position = {}.pos;\n", vertex);
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if (host_config.backend_depth_clamp)
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{
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out.Write("\tgl_ClipDistance[0] = {}.clipDist0;\n", vertex);
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out.Write("\tgl_ClipDistance[1] = {}.clipDist1;\n", vertex);
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}
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AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, host_config);
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}
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else
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{
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out.Write("\tps.o = {};\n", vertex);
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out.Write("\tps.posout = {}.pos;\n", vertex);
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}
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if (stereo)
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{
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// Select the output layer
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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out.Write("\tgl_Layer = eye;\n");
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else
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{
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out.Write("\tps.layer = eye;\n");
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}
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if (!host_config.backend_gl_layer_in_fs)
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out.Write("\tlayer = eye;\n");
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}
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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out.Write("\tEmitVertex();\n");
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else
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out.Write("\toutput.Append(ps);\n");
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}
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static void EndPrimitive(ShaderCode& out, const ShaderHostConfig& host_config,
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const geometry_shader_uid_data* uid_data, APIType api_type, bool wireframe,
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bool stereo)
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{
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if (wireframe)
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EmitVertex(out, host_config, uid_data, "first", api_type, wireframe, stereo);
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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out.Write("\tEndPrimitive();\n");
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else
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out.Write("\toutput.RestartStrip();\n");
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}
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void EnumerateGeometryShaderUids(const std::function<void(const GeometryShaderUid&)>& callback)
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{
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GeometryShaderUid uid;
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const std::array<PrimitiveType, 3> primitive_lut = {
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{g_backend_info.bSupportsPrimitiveRestart ? PrimitiveType::TriangleStrip :
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PrimitiveType::Triangles,
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PrimitiveType::Lines, PrimitiveType::Points}};
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for (PrimitiveType primitive : primitive_lut)
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{
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geometry_shader_uid_data* const guid = uid.GetUidData();
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guid->primitive_type = static_cast<u32>(primitive);
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for (u32 texgens = 0; texgens <= 8; texgens++)
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{
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guid->numTexGens = texgens;
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callback(uid);
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}
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}
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}
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