mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-05-21 10:55:33 +03:00
50d0e1cefd
This patch increases ray-tracing performance up to 12% in regular mode, and up to 36% in FSAA mode.
78 lines
3.0 KiB
GLSL
78 lines
3.0 KiB
GLSL
//! Input ray-traced image.
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uniform sampler2D uFSAAInputTexture;
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//! Number of accumulated FSAA samples.
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uniform int uSamples;
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//! Output pixel color.
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out vec4 OutColor;
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#define LUM_DIFFERENCE 0.085f
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#define LUMA vec3 (0.2126f, 0.7152f, 0.0722f)
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// =======================================================================
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// function : main
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// purpose :
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// =======================================================================
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void main (void)
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{
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int aPixelX = int (gl_FragCoord.x);
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int aPixelY = int (gl_FragCoord.y);
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// Adjust FLIPTRI pattern used for adaptive FSAA
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float anOffsetX = mix (uOffsetX, -uOffsetX, float (aPixelX % 2));
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float anOffsetY = mix (uOffsetY, -uOffsetY, float (aPixelY % 2));
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vec4 aClr0 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX + 0, aPixelY + 0), 0);
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vec4 aClr1 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX + 0, aPixelY - 1), 0);
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vec4 aClr2 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX + 0, aPixelY + 1), 0);
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vec4 aClr3 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX + 1, aPixelY + 0), 0);
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vec4 aClr4 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX + 1, aPixelY - 1), 0);
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vec4 aClr5 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX + 1, aPixelY + 1), 0);
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vec4 aClr6 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX - 1, aPixelY + 0), 0);
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vec4 aClr7 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX - 1, aPixelY - 1), 0);
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vec4 aClr8 = texelFetch (uFSAAInputTexture, ivec2 (aPixelX - 1, aPixelY + 1), 0);
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float aLum = dot (LUMA, aClr0.xyz);
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bool aRender = abs (aClr1.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr2.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr3.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr4.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr5.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr6.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr7.w - aClr0.w) > LUM_DIFFERENCE ||
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abs (aClr8.w - aClr0.w) > LUM_DIFFERENCE;
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if (!aRender)
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{
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aRender = abs (dot (LUMA, aClr1.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr2.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr3.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr4.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr5.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr6.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr7.xyz) - aLum) > LUM_DIFFERENCE ||
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abs (dot (LUMA, aClr8.xyz) - aLum) > LUM_DIFFERENCE;
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}
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vec4 aColor = aClr0;
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if (aRender)
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{
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SRay aRay = GenerateRay (vPixel + vec2 (anOffsetX, anOffsetY));
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vec3 aInvDirect = 1.f / max (abs (aRay.Direct), SMALL);
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aInvDirect = vec3 (aRay.Direct.x < 0.f ? -aInvDirect.x : aInvDirect.x,
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aRay.Direct.y < 0.f ? -aInvDirect.y : aInvDirect.y,
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aRay.Direct.z < 0.f ? -aInvDirect.z : aInvDirect.z);
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aColor = mix (aClr0, clamp (Radiance (aRay, aInvDirect), 0.f, 1.f), 1.f / uSamples);
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}
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OutColor = aColor;
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} |