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https://github.com/dolphin-emu/dolphin.git
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e6b2212ec0
Drivers that don't support GL_ARB_shading_language_420pack require that the storage qualifier be specified even when inside an interface block. AMD's driver throws a compile error when "centroid in/out" is used within an interface block. Our previous behavior was to include the storage qualifier regardless, but this wasn't working on AMD, therefore we should check for the presence of the extension and include based on this, instead.
331 lines
10 KiB
C++
331 lines
10 KiB
C++
// Copyright 2014 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <cmath>
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#include <cstring>
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#include "Common/CommonTypes.h"
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#include "VideoCommon/BPMemory.h"
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#include "VideoCommon/GeometryShaderGen.h"
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#include "VideoCommon/LightingShaderGen.h"
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#include "VideoCommon/VideoConfig.h"
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static const char* primitives_ogl[] =
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{
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"points",
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"lines",
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"triangles"
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};
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static const char* primitives_d3d[] =
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{
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"point",
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"line",
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"triangle"
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};
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template<class T> static void EmitVertex(T& out, const char* vertex, API_TYPE ApiType, bool first_vertex = false);
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template<class T> static void EndPrimitive(T& out, API_TYPE ApiType);
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template<class T>
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static T GenerateGeometryShader(u32 primitive_type, API_TYPE ApiType)
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{
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T out;
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// Non-uid template parameters will write to the dummy data (=> gets optimized out)
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geometry_shader_uid_data dummy_data;
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geometry_shader_uid_data* uid_data = out.template GetUidData<geometry_shader_uid_data>();
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if (uid_data != nullptr)
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memset(uid_data, 0, sizeof(*uid_data));
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else
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uid_data = &dummy_data;
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uid_data->primitive_type = primitive_type;
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const unsigned int vertex_in = primitive_type + 1;
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unsigned int vertex_out = primitive_type == PRIMITIVE_TRIANGLES ? 3 : 4;
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uid_data->wireframe = g_ActiveConfig.bWireFrame;
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if (g_ActiveConfig.bWireFrame)
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vertex_out++;
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uid_data->stereo = g_ActiveConfig.iStereoMode > 0;
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if (ApiType == API_OPENGL)
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{
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// Insert layout parameters
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if (g_ActiveConfig.backend_info.bSupportsGSInstancing)
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{
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out.Write("layout(%s, invocations = %d) in;\n", primitives_ogl[primitive_type], g_ActiveConfig.iStereoMode > 0 ? 2 : 1);
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out.Write("layout(%s_strip, max_vertices = %d) out;\n", g_ActiveConfig.bWireFrame ? "line" : "triangle", vertex_out);
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}
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else
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{
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out.Write("layout(%s) in;\n", primitives_ogl[primitive_type]);
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out.Write("layout(%s_strip, max_vertices = %d) out;\n", g_ActiveConfig.bWireFrame ? "line" : "triangle", g_ActiveConfig.iStereoMode > 0 ? vertex_out * 2 : vertex_out);
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}
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}
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out.Write("%s", s_lighting_struct);
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// uniforms
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if (ApiType == API_OPENGL)
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out.Write("layout(std140%s) uniform GSBlock {\n", g_ActiveConfig.backend_info.bSupportsBindingLayout ? ", binding = 3" : "");
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else
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out.Write("cbuffer GSBlock {\n");
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out.Write(
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"\tfloat4 " I_STEREOPARAMS";\n"
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"\tfloat4 " I_LINEPTPARAMS";\n"
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"\tint4 " I_TEXOFFSET";\n"
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"};\n");
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uid_data->numTexGens = xfmem.numTexGen.numTexGens;
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uid_data->pixel_lighting = g_ActiveConfig.bEnablePixelLighting;
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out.Write("struct VS_OUTPUT {\n");
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GenerateVSOutputMembers<T>(out, ApiType, "");
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out.Write("};\n");
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if (ApiType == API_OPENGL)
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{
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if (g_ActiveConfig.backend_info.bSupportsGSInstancing)
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out.Write("#define InstanceID gl_InvocationID\n");
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out.Write("in VertexData {\n");
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GenerateVSOutputMembers<T>(out, ApiType, GetInterpolationQualifier(true, true));
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out.Write("} vs[%d];\n", vertex_in);
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out.Write("out VertexData {\n");
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GenerateVSOutputMembers<T>(out, ApiType, GetInterpolationQualifier(true, false));
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if (g_ActiveConfig.iStereoMode > 0)
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out.Write("\tflat int layer;\n");
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out.Write("} ps;\n");
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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 (g_ActiveConfig.iStereoMode > 0)
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out.Write("\tuint layer : SV_RenderTargetArrayIndex;\n");
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out.Write("};\n");
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if (g_ActiveConfig.backend_info.bSupportsGSInstancing)
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{
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out.Write("[maxvertexcount(%d)]\n[instance(%d)]\n", vertex_out, g_ActiveConfig.iStereoMode > 0 ? 2 : 1);
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out.Write("void main(%s VS_OUTPUT o[%d], inout %sStream<VertexData> output, in uint InstanceID : SV_GSInstanceID)\n{\n", primitives_d3d[primitive_type], vertex_in, g_ActiveConfig.bWireFrame ? "Line" : "Triangle");
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}
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else
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{
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out.Write("[maxvertexcount(%d)]\n", g_ActiveConfig.iStereoMode > 0 ? vertex_out * 2 : vertex_out);
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out.Write("void main(%s VS_OUTPUT o[%d], inout %sStream<VertexData> output)\n{\n", primitives_d3d[primitive_type], vertex_in, g_ActiveConfig.bWireFrame ? "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 == PRIMITIVE_LINES)
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{
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if (ApiType == API_OPENGL)
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{
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out.Write("\tVS_OUTPUT start, end;\n");
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AssignVSOutputMembers(out, "start", "vs[0]");
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AssignVSOutputMembers(out, "end", "vs[1]");
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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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out.Write("\tVS_OUTPUT end = o[1];\n");
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}
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// GameCube/Wii's line drawing algorithm is a little quirky. It does not
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// use the correct line caps. Instead, the line caps are vertical or
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// horizontal depending the slope of the line.
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out.Write(
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"\tfloat2 offset;\n"
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"\tfloat2 to = abs(end.pos.xy / end.pos.w - start.pos.xy / start.pos.w);\n"
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// FIXME: What does real hardware do when line is at a 45-degree angle?
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// FIXME: Lines aren't drawn at the correct width. See Twilight Princess map.
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"\tif (" I_LINEPTPARAMS".y * to.y > " I_LINEPTPARAMS".x * to.x) {\n"
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// Line is more tall. Extend geometry left and right.
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// Lerp LineWidth/2 from [0..VpWidth] to [-1..1]
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"\t\toffset = float2(" I_LINEPTPARAMS".z / " I_LINEPTPARAMS".x, 0);\n"
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"\t} else {\n"
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// Line is more wide. Extend geometry up and down.
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// Lerp LineWidth/2 from [0..VpHeight] to [1..-1]
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"\t\toffset = float2(0, -" I_LINEPTPARAMS".z / " I_LINEPTPARAMS".y);\n"
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"\t}\n");
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}
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else if (primitive_type == PRIMITIVE_POINTS)
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{
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if (ApiType == API_OPENGL)
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{
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out.Write("\tVS_OUTPUT center;\n");
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AssignVSOutputMembers(out, "center", "vs[0]");
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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".x, -" I_LINEPTPARAMS".w / " I_LINEPTPARAMS".y) * center.pos.w;\n");
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}
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if (g_ActiveConfig.iStereoMode > 0)
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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 (g_ActiveConfig.backend_info.bSupportsGSInstancing)
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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 (g_ActiveConfig.bWireFrame)
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out.Write("\tVS_OUTPUT first;\n");
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out.Write("\tfor (int i = 0; i < %d; ++i) {\n", vertex_in);
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if (ApiType == API_OPENGL)
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{
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out.Write("\tVS_OUTPUT f;\n");
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AssignVSOutputMembers(out, "f", "vs[i]");
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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 (g_ActiveConfig.iStereoMode > 0)
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{
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// Select the output layer
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out.Write("\tps.layer = eye;\n");
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if (ApiType == API_OPENGL)
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out.Write("\tgl_Layer = eye;\n");
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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("\tf.pos.x += " I_STEREOPARAMS"[eye] * (f.pos.w - " I_STEREOPARAMS"[2]);\n");
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}
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if (primitive_type == PRIMITIVE_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 (unsigned int i = 0; i < xfmem.numTexGen.numTexGens; ++i)
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{
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out.Write("\tif (((" I_TEXOFFSET"[0] >> %d) & 0x1) != 0)\n", i);
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out.Write("\t\tr.tex%d.x += texOffset;\n", i);
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}
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out.Write("\t}\n");
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EmitVertex<T>(out, "l", ApiType, true);
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EmitVertex<T>(out, "r", ApiType);
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}
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else if (primitive_type == PRIMITIVE_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"[3]), 1.0 / float(" I_TEXOFFSET"[3]));\n");
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for (unsigned int i = 0; i < xfmem.numTexGen.numTexGens; ++i)
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{
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out.Write("\tif (((" I_TEXOFFSET"[1] >> %d) & 0x1) != 0) {\n", i);
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out.Write("\t\tll.tex%d.xy += float2(0,1) * texOffset;\n", i);
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out.Write("\t\tlr.tex%d.xy += texOffset;\n", i);
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out.Write("\t\tur.tex%d.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<T>(out, "ll", ApiType, true);
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EmitVertex<T>(out, "lr", ApiType);
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EmitVertex<T>(out, "ul", ApiType);
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EmitVertex<T>(out, "ur", ApiType);
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}
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else
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{
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EmitVertex<T>(out, "f", ApiType, true);
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}
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out.Write("\t}\n");
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EndPrimitive<T>(out, ApiType);
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if (g_ActiveConfig.iStereoMode > 0 && !g_ActiveConfig.backend_info.bSupportsGSInstancing)
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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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template<class T>
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static void EmitVertex(T& out, const char* vertex, API_TYPE ApiType, bool first_vertex)
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{
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if (g_ActiveConfig.bWireFrame && first_vertex)
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out.Write("\tif (i == 0) first = %s;\n", vertex);
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if (ApiType == API_OPENGL)
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{
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out.Write("\tgl_Position = %s.pos;\n", vertex);
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AssignVSOutputMembers(out, "ps", vertex);
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}
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else
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{
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out.Write("\tps.o = %s;\n", vertex);
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}
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if (ApiType == API_OPENGL)
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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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template<class T>
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static void EndPrimitive(T& out, API_TYPE ApiType)
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{
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if (g_ActiveConfig.bWireFrame)
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EmitVertex<T>(out, "first", ApiType);
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if (ApiType == API_OPENGL)
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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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GeometryShaderUid GetGeometryShaderUid(u32 primitive_type, API_TYPE ApiType)
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{
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return GenerateGeometryShader<GeometryShaderUid>(primitive_type, ApiType);
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}
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ShaderCode GenerateGeometryShaderCode(u32 primitive_type, API_TYPE ApiType)
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{
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return GenerateGeometryShader<ShaderCode>(primitive_type, ApiType);
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}
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