mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-09-20 11:21:43 +02:00
366 lines
14 KiB
C++
366 lines
14 KiB
C++
// Copyright 2014 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#include "VideoCommon/GeometryShaderGen.h"
|
|
|
|
#include <cmath>
|
|
#include <cstring>
|
|
|
|
#include "Common/CommonTypes.h"
|
|
#include "VideoCommon/DriverDetails.h"
|
|
#include "VideoCommon/LightingShaderGen.h"
|
|
#include "VideoCommon/VideoCommon.h"
|
|
#include "VideoCommon/VideoConfig.h"
|
|
#include "VideoCommon/XFMemory.h"
|
|
|
|
static const char* primitives_ogl[] = {"points", "lines", "triangles"};
|
|
|
|
static const char* primitives_d3d[] = {"point", "line", "triangle"};
|
|
|
|
bool geometry_shader_uid_data::IsPassthrough() const
|
|
{
|
|
const bool stereo = g_ActiveConfig.iStereoMode > 0;
|
|
const bool wireframe = g_ActiveConfig.bWireFrame;
|
|
return primitive_type == PRIMITIVE_TRIANGLES && !stereo && !wireframe;
|
|
}
|
|
|
|
GeometryShaderUid GetGeometryShaderUid(u32 primitive_type)
|
|
{
|
|
ShaderUid<geometry_shader_uid_data> out;
|
|
geometry_shader_uid_data* uid_data = out.GetUidData<geometry_shader_uid_data>();
|
|
memset(uid_data, 0, sizeof(geometry_shader_uid_data));
|
|
|
|
uid_data->primitive_type = primitive_type;
|
|
uid_data->numTexGens = xfmem.numTexGen.numTexGens;
|
|
|
|
return out;
|
|
}
|
|
|
|
static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
|
|
const geometry_shader_uid_data* uid_data, const char* vertex,
|
|
APIType ApiType, bool wireframe, bool pixel_lighting,
|
|
bool first_vertex = false);
|
|
static void EndPrimitive(ShaderCode& out, const ShaderHostConfig& host_config,
|
|
const geometry_shader_uid_data* uid_data, APIType ApiType, bool wireframe,
|
|
bool pixel_lighting);
|
|
|
|
ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& host_config,
|
|
const geometry_shader_uid_data* uid_data)
|
|
{
|
|
ShaderCode out;
|
|
// Non-uid template parameters will write to the dummy data (=> gets optimized out)
|
|
|
|
const bool wireframe = host_config.wireframe;
|
|
const bool pixel_lighting = g_ActiveConfig.bEnablePixelLighting;
|
|
const bool msaa = host_config.msaa;
|
|
const bool ssaa = host_config.ssaa;
|
|
const bool stereo = host_config.stereo;
|
|
const unsigned int vertex_in = uid_data->primitive_type + 1;
|
|
unsigned int vertex_out = uid_data->primitive_type == PRIMITIVE_TRIANGLES ? 3 : 4;
|
|
|
|
if (wireframe)
|
|
vertex_out++;
|
|
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
{
|
|
// Insert layout parameters
|
|
if (host_config.backend_gs_instancing)
|
|
{
|
|
out.Write("layout(%s, invocations = %d) in;\n", primitives_ogl[uid_data->primitive_type],
|
|
stereo ? 2 : 1);
|
|
out.Write("layout(%s_strip, max_vertices = %d) out;\n", wireframe ? "line" : "triangle",
|
|
vertex_out);
|
|
}
|
|
else
|
|
{
|
|
out.Write("layout(%s) in;\n", primitives_ogl[uid_data->primitive_type]);
|
|
out.Write("layout(%s_strip, max_vertices = %d) out;\n", wireframe ? "line" : "triangle",
|
|
stereo ? vertex_out * 2 : vertex_out);
|
|
}
|
|
}
|
|
|
|
out.Write("%s", s_lighting_struct);
|
|
|
|
// uniforms
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
out.Write("UBO_BINDING(std140, 3) uniform GSBlock {\n");
|
|
else
|
|
out.Write("cbuffer GSBlock {\n");
|
|
|
|
out.Write("\tfloat4 " I_STEREOPARAMS ";\n"
|
|
"\tfloat4 " I_LINEPTPARAMS ";\n"
|
|
"\tint4 " I_TEXOFFSET ";\n"
|
|
"};\n");
|
|
|
|
out.Write("struct VS_OUTPUT {\n");
|
|
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, pixel_lighting, "");
|
|
out.Write("};\n");
|
|
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
{
|
|
if (host_config.backend_gs_instancing)
|
|
out.Write("#define InstanceID gl_InvocationID\n");
|
|
|
|
out.Write("VARYING_LOCATION(0) in VertexData {\n");
|
|
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, pixel_lighting,
|
|
GetInterpolationQualifier(msaa, ssaa, true, true));
|
|
out.Write("} vs[%d];\n", vertex_in);
|
|
|
|
out.Write("VARYING_LOCATION(0) out VertexData {\n");
|
|
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, pixel_lighting,
|
|
GetInterpolationQualifier(msaa, ssaa, true, false));
|
|
|
|
if (stereo)
|
|
out.Write("\tflat int layer;\n");
|
|
|
|
out.Write("} ps;\n");
|
|
|
|
out.Write("void main()\n{\n");
|
|
}
|
|
else // D3D
|
|
{
|
|
out.Write("struct VertexData {\n");
|
|
out.Write("\tVS_OUTPUT o;\n");
|
|
|
|
if (stereo)
|
|
out.Write("\tuint layer : SV_RenderTargetArrayIndex;\n");
|
|
|
|
out.Write("};\n");
|
|
|
|
if (host_config.backend_gs_instancing)
|
|
{
|
|
out.Write("[maxvertexcount(%d)]\n[instance(%d)]\n", vertex_out, stereo ? 2 : 1);
|
|
out.Write("void main(%s VS_OUTPUT o[%d], inout %sStream<VertexData> output, in uint "
|
|
"InstanceID : SV_GSInstanceID)\n{\n",
|
|
primitives_d3d[uid_data->primitive_type], vertex_in,
|
|
wireframe ? "Line" : "Triangle");
|
|
}
|
|
else
|
|
{
|
|
out.Write("[maxvertexcount(%d)]\n", stereo ? vertex_out * 2 : vertex_out);
|
|
out.Write("void main(%s VS_OUTPUT o[%d], inout %sStream<VertexData> output)\n{\n",
|
|
primitives_d3d[uid_data->primitive_type], vertex_in,
|
|
wireframe ? "Line" : "Triangle");
|
|
}
|
|
|
|
out.Write("\tVertexData ps;\n");
|
|
}
|
|
|
|
if (uid_data->primitive_type == PRIMITIVE_LINES)
|
|
{
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
{
|
|
out.Write("\tVS_OUTPUT start, end;\n");
|
|
AssignVSOutputMembers(out, "start", "vs[0]", uid_data->numTexGens, pixel_lighting);
|
|
AssignVSOutputMembers(out, "end", "vs[1]", uid_data->numTexGens, pixel_lighting);
|
|
}
|
|
else
|
|
{
|
|
out.Write("\tVS_OUTPUT start = o[0];\n");
|
|
out.Write("\tVS_OUTPUT end = o[1];\n");
|
|
}
|
|
|
|
// GameCube/Wii's line drawing algorithm is a little quirky. It does not
|
|
// use the correct line caps. Instead, the line caps are vertical or
|
|
// horizontal depending the slope of the line.
|
|
out.Write("\tfloat2 offset;\n"
|
|
"\tfloat2 to = abs(end.pos.xy / end.pos.w - start.pos.xy / start.pos.w);\n"
|
|
// FIXME: What does real hardware do when line is at a 45-degree angle?
|
|
// FIXME: Lines aren't drawn at the correct width. See Twilight Princess map.
|
|
"\tif (" I_LINEPTPARAMS ".y * to.y > " I_LINEPTPARAMS ".x * to.x) {\n"
|
|
// Line is more tall. Extend geometry left and right.
|
|
// Lerp LineWidth/2 from [0..VpWidth] to [-1..1]
|
|
"\t\toffset = float2(" I_LINEPTPARAMS ".z / " I_LINEPTPARAMS ".x, 0);\n"
|
|
"\t} else {\n"
|
|
// Line is more wide. Extend geometry up and down.
|
|
// Lerp LineWidth/2 from [0..VpHeight] to [1..-1]
|
|
"\t\toffset = float2(0, -" I_LINEPTPARAMS ".z / " I_LINEPTPARAMS ".y);\n"
|
|
"\t}\n");
|
|
}
|
|
else if (uid_data->primitive_type == PRIMITIVE_POINTS)
|
|
{
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
{
|
|
out.Write("\tVS_OUTPUT center;\n");
|
|
AssignVSOutputMembers(out, "center", "vs[0]", uid_data->numTexGens, pixel_lighting);
|
|
}
|
|
else
|
|
{
|
|
out.Write("\tVS_OUTPUT center = o[0];\n");
|
|
}
|
|
|
|
// Offset from center to upper right vertex
|
|
// Lerp PointSize/2 from [0,0..VpWidth,VpHeight] to [-1,1..1,-1]
|
|
out.Write("\tfloat2 offset = float2(" I_LINEPTPARAMS ".w / " I_LINEPTPARAMS
|
|
".x, -" I_LINEPTPARAMS ".w / " I_LINEPTPARAMS ".y) * center.pos.w;\n");
|
|
}
|
|
|
|
if (stereo)
|
|
{
|
|
// If the GPU supports invocation we don't need a for loop and can simply use the
|
|
// invocation identifier to determine which layer we're rendering.
|
|
if (host_config.backend_gs_instancing)
|
|
out.Write("\tint eye = InstanceID;\n");
|
|
else
|
|
out.Write("\tfor (int eye = 0; eye < 2; ++eye) {\n");
|
|
}
|
|
|
|
if (wireframe)
|
|
out.Write("\tVS_OUTPUT first;\n");
|
|
|
|
out.Write("\tfor (int i = 0; i < %d; ++i) {\n", vertex_in);
|
|
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
{
|
|
out.Write("\tVS_OUTPUT f;\n");
|
|
AssignVSOutputMembers(out, "f", "vs[i]", uid_data->numTexGens, pixel_lighting);
|
|
|
|
if (host_config.backend_depth_clamp &&
|
|
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_CLIP_DISTANCE))
|
|
{
|
|
// On certain GPUs we have to consume the clip distance from the vertex shader
|
|
// or else the other vertex shader outputs will get corrupted.
|
|
out.Write("\tf.clipDist0 = gl_in[i].gl_ClipDistance[0];\n");
|
|
out.Write("\tf.clipDist1 = gl_in[i].gl_ClipDistance[1];\n");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
out.Write("\tVS_OUTPUT f = o[i];\n");
|
|
}
|
|
|
|
if (stereo)
|
|
{
|
|
// Select the output layer
|
|
out.Write("\tps.layer = eye;\n");
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
out.Write("\tgl_Layer = eye;\n");
|
|
|
|
// For stereoscopy add a small horizontal offset in Normalized Device Coordinates proportional
|
|
// to the depth of the vertex. We retrieve the depth value from the w-component of the projected
|
|
// vertex which contains the negated z-component of the original vertex.
|
|
// For negative parallax (out-of-screen effects) we subtract a convergence value from
|
|
// the depth value. This results in objects at a distance smaller than the convergence
|
|
// distance to seemingly appear in front of the screen.
|
|
// This formula is based on page 13 of the "Nvidia 3D Vision Automatic, Best Practices Guide"
|
|
out.Write("\tfloat hoffset = (eye == 0) ? " I_STEREOPARAMS ".x : " I_STEREOPARAMS ".y;\n");
|
|
out.Write("\tf.pos.x += hoffset * (f.pos.w - " I_STEREOPARAMS ".z);\n");
|
|
}
|
|
|
|
if (uid_data->primitive_type == PRIMITIVE_LINES)
|
|
{
|
|
out.Write("\tVS_OUTPUT l = f;\n"
|
|
"\tVS_OUTPUT r = f;\n");
|
|
|
|
out.Write("\tl.pos.xy -= offset * l.pos.w;\n"
|
|
"\tr.pos.xy += offset * r.pos.w;\n");
|
|
|
|
out.Write("\tif (" I_TEXOFFSET "[2] != 0) {\n");
|
|
out.Write("\tfloat texOffset = 1.0 / float(" I_TEXOFFSET "[2]);\n");
|
|
|
|
for (unsigned int i = 0; i < uid_data->numTexGens; ++i)
|
|
{
|
|
out.Write("\tif (((" I_TEXOFFSET "[0] >> %d) & 0x1) != 0)\n", i);
|
|
out.Write("\t\tr.tex%d.x += texOffset;\n", i);
|
|
}
|
|
out.Write("\t}\n");
|
|
|
|
EmitVertex(out, host_config, uid_data, "l", ApiType, wireframe, pixel_lighting, true);
|
|
EmitVertex(out, host_config, uid_data, "r", ApiType, wireframe, pixel_lighting);
|
|
}
|
|
else if (uid_data->primitive_type == PRIMITIVE_POINTS)
|
|
{
|
|
out.Write("\tVS_OUTPUT ll = f;\n"
|
|
"\tVS_OUTPUT lr = f;\n"
|
|
"\tVS_OUTPUT ul = f;\n"
|
|
"\tVS_OUTPUT ur = f;\n");
|
|
|
|
out.Write("\tll.pos.xy += float2(-1,-1) * offset;\n"
|
|
"\tlr.pos.xy += float2(1,-1) * offset;\n"
|
|
"\tul.pos.xy += float2(-1,1) * offset;\n"
|
|
"\tur.pos.xy += offset;\n");
|
|
|
|
out.Write("\tif (" I_TEXOFFSET "[3] != 0) {\n");
|
|
out.Write("\tfloat2 texOffset = float2(1.0 / float(" I_TEXOFFSET
|
|
"[3]), 1.0 / float(" I_TEXOFFSET "[3]));\n");
|
|
|
|
for (unsigned int i = 0; i < uid_data->numTexGens; ++i)
|
|
{
|
|
out.Write("\tif (((" I_TEXOFFSET "[1] >> %d) & 0x1) != 0) {\n", i);
|
|
out.Write("\t\tul.tex%d.xy += float2(0,1) * texOffset;\n", i);
|
|
out.Write("\t\tur.tex%d.xy += texOffset;\n", i);
|
|
out.Write("\t\tlr.tex%d.xy += float2(1,0) * texOffset;\n", i);
|
|
out.Write("\t}\n");
|
|
}
|
|
out.Write("\t}\n");
|
|
|
|
EmitVertex(out, host_config, uid_data, "ll", ApiType, wireframe, pixel_lighting, true);
|
|
EmitVertex(out, host_config, uid_data, "lr", ApiType, wireframe, pixel_lighting);
|
|
EmitVertex(out, host_config, uid_data, "ul", ApiType, wireframe, pixel_lighting);
|
|
EmitVertex(out, host_config, uid_data, "ur", ApiType, wireframe, pixel_lighting);
|
|
}
|
|
else
|
|
{
|
|
EmitVertex(out, host_config, uid_data, "f", ApiType, wireframe, pixel_lighting, true);
|
|
}
|
|
|
|
out.Write("\t}\n");
|
|
|
|
EndPrimitive(out, host_config, uid_data, ApiType, wireframe, pixel_lighting);
|
|
|
|
if (stereo && !host_config.backend_gs_instancing)
|
|
out.Write("\t}\n");
|
|
|
|
out.Write("}\n");
|
|
|
|
return out;
|
|
}
|
|
|
|
static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
|
|
const geometry_shader_uid_data* uid_data, const char* vertex,
|
|
APIType ApiType, bool wireframe, bool pixel_lighting, bool first_vertex)
|
|
{
|
|
if (wireframe && first_vertex)
|
|
out.Write("\tif (i == 0) first = %s;\n", vertex);
|
|
|
|
if (ApiType == APIType::OpenGL)
|
|
{
|
|
out.Write("\tgl_Position = %s.pos;\n", vertex);
|
|
if (host_config.backend_depth_clamp)
|
|
{
|
|
out.Write("\tgl_ClipDistance[0] = %s.clipDist0;\n", vertex);
|
|
out.Write("\tgl_ClipDistance[1] = %s.clipDist1;\n", vertex);
|
|
}
|
|
AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, pixel_lighting);
|
|
}
|
|
else if (ApiType == APIType::Vulkan)
|
|
{
|
|
// Vulkan NDC space has Y pointing down (right-handed NDC space).
|
|
out.Write("\tgl_Position = %s.pos;\n", vertex);
|
|
out.Write("\tgl_Position.y = -gl_Position.y;\n");
|
|
AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, pixel_lighting);
|
|
}
|
|
else
|
|
{
|
|
out.Write("\tps.o = %s;\n", vertex);
|
|
}
|
|
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
out.Write("\tEmitVertex();\n");
|
|
else
|
|
out.Write("\toutput.Append(ps);\n");
|
|
}
|
|
|
|
static void EndPrimitive(ShaderCode& out, const ShaderHostConfig& host_config,
|
|
const geometry_shader_uid_data* uid_data, APIType ApiType, bool wireframe,
|
|
bool pixel_lighting)
|
|
{
|
|
if (wireframe)
|
|
EmitVertex(out, host_config, uid_data, "first", ApiType, wireframe, pixel_lighting);
|
|
|
|
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
|
|
out.Write("\tEndPrimitive();\n");
|
|
else
|
|
out.Write("\toutput.RestartStrip();\n");
|
|
}
|