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doing blur shader without alpha blending

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This commit is contained in:
Martins Mozeiko
2024-01-23 11:45:42 -08:00
committed by Ryan Fleury
parent 82f86d654f
commit bae91cd40c
4 changed files with 35 additions and 31 deletions
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src/render/d3d11/generated/render_d3d11.meta.h
+12 -15
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@@ -227,6 +227,7 @@ str8_lit_comp(
" float4 position : SV_POSITION;\n"
" float2 texcoord : TEX;\n"
" float2 sdf_sample_pos : SDF;\n"
" nointerpolation float2 rect_half_size : RHS;\n"
" float corner_radius : RAD;\n"
"};\n"
"\n"
@@ -271,6 +272,7 @@ str8_lit_comp(
" v2p.position = float4(vertex_position__scr.x, -vertex_position__scr.y, 0.f, 1.f);\n"
" v2p.texcoord = vertex_position__pct;\n"
" v2p.sdf_sample_pos = (2.f * cornercoords__pct - 1.f) * rect_half_size;\n"
" v2p.rect_half_size = rect_half_size - 2.f;\n"
" v2p.corner_radius = corner_radii__px[c2v.vertex_id];\n"
" }\n"
" return v2p;\n"
@@ -282,33 +284,28 @@ str8_lit_comp(
"ps_main(Vertex2Pixel v2p) : SV_TARGET\n"
"{\n"
" // rjf: blend weighted texture samples into color\n"
" float4 color = kernel[0].x * stage_t2d.Sample(stage_sampler, v2p.texcoord);\n"
" color.a = kernel[0].x;\n"
" float3 color = kernel[0].x * stage_t2d.Sample(stage_sampler, v2p.texcoord).rgb;\n"
" \n"
" for(uint i = 1; i < blur_count; i += 1)\n"
" {\n"
" float weight = kernel[i].x;\n"
" float offset = kernel[i].y;\n"
" float4 min_sample = stage_t2d.Sample(stage_sampler, v2p.texcoord - offset * direction);\n"
" float4 max_sample = stage_t2d.Sample(stage_sampler, v2p.texcoord + offset * direction);\n"
" min_sample.a = 1.f;\n"
" max_sample.a = 1.f;\n"
" color += min_sample * weight;\n"
" color += max_sample * weight;\n"
" color += weight * stage_t2d.Sample(stage_sampler, v2p.texcoord - offset * direction).rgb;\n"
" color += weight * stage_t2d.Sample(stage_sampler, v2p.texcoord + offset * direction).rgb;\n"
" }\n"
" \n"
" // rjf: determine SDF sample position\n"
" float2 rect_half_size = float2((rect.z-rect.x)/2, (rect.w-rect.y)/2);\n"
" float2 sdf_sample_pos = v2p.sdf_sample_pos;\n"
" \n"
" // rjf: sample for corners\n"
" float corner_sdf_s = rect_sdf(sdf_sample_pos, rect_half_size - 2.f, v2p.corner_radius);\n"
" float corner_sdf_s = rect_sdf(v2p.sdf_sample_pos, v2p.rect_half_size, v2p.corner_radius);\n"
" float corner_sdf_t = 1-smoothstep(0, 2, corner_sdf_s);\n"
" \n"
" // rjf: weight output color by sdf\n"
" color.a *= corner_sdf_t;\n"
" // this is doing alpha testing, leave blurring only where mostly opaque pixels are\n"
" if (corner_sdf_t < 0.9f)\n"
" {\n"
" discard;\n"
" }\n"
" \n"
" return color;\n"
" return float4(color, 1.f);\n"
"}\n"
""
);