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GPU/HW: Expand lines into triangles before rendering

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Fewer batches, consistent upscaling behavior.
This commit is contained in:
Connor McLaughlin
2020-08-02 17:17:05 +10:00
parent 568cfa1865
commit 96ba9198ef
11 changed files with 210 additions and 368 deletions
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105
src/core/gpu_hw_shadergen.cpp
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@ -885,111 +885,6 @@ float4 SampleFromVRAM(uint4 texpage, float2 coords)
return ss.str();
}
std::string GPU_HW_ShaderGen::GenerateBatchLineExpandGeometryShader()
{
std::stringstream ss;
WriteHeader(ss);
WriteCommonFunctions(ss);
ss << R"(
CONSTANT float2 WIDTH = (float(RESOLUTION_SCALE * 2u) / float2(VRAM_SIZE));
)";
// GS is a pain, too different between HLSL and GLSL...
if (m_glsl)
{
if (IsVulkan())
ss << "layout(location = 0) ";
ss << R"(in VertexDataVS {
float4 v_col0;
} in_data[];)";
if (IsVulkan())
ss << "layout(location = 0) ";
ss << R"(out VertexData {
float4 v_col0;
} out_data;
layout(lines) in;
layout(triangle_strip, max_vertices = 4) out;
void main() {
float2 dir = normalize(gl_in[1].gl_Position.xy - gl_in[0].gl_Position.xy);
float2 normal = cross(float3(dir, 0.0), float3(0.0, 0.0, 1.0)).xy * WIDTH;
float4 offset = float4(normal, 0.0, 0.0);
// top-left
out_data.v_col0 = in_data[0].v_col0;
gl_Position = gl_in[0].gl_Position;
EmitVertex();
// top-right
out_data.v_col0 = in_data[0].v_col0;
gl_Position = gl_in[0].gl_Position + offset;
EmitVertex();
// bottom-left
out_data.v_col0 = in_data[1].v_col0;
gl_Position = gl_in[1].gl_Position;
EmitVertex();
// bottom-right
out_data.v_col0 = in_data[1].v_col0;
gl_Position = gl_in[1].gl_Position + offset;
EmitVertex();
EndPrimitive();
}
)";
}
else
{
ss << R"(
struct Vertex
{
float4 col0 : COLOR0;
float4 pos : SV_Position;
};
[maxvertexcount(4)]
void main(line Vertex input[2], inout TriangleStream<Vertex> output)
{
Vertex v;
float2 dir = normalize(input[1].pos.xy - input[0].pos.xy);
float2 normal = cross(float3(dir, 0.0), float3(0.0, 0.0, 1.0)).xy * WIDTH;
float4 offset = float4(normal, 0.0, 0.0);
// top-left
v.col0 = input[0].col0;
v.pos = input[0].pos;
output.Append(v);
// top-right
v.col0 = input[0].col0;
v.pos = input[0].pos + offset;
output.Append(v);
// bottom-left
v.col0 = input[1].col0;
v.pos = input[1].pos;
output.Append(v);
// bottom-right
v.col0 = input[1].col0;
v.pos = input[1].pos + offset;
output.Append(v);
output.RestartStrip();
}
)";
}
return ss.str();
}
std::string GPU_HW_ShaderGen::GenerateScreenQuadVertexShader()
{
std::stringstream ss;