49 lines
1.5 KiB
Scala
49 lines
1.5 KiB
Scala
/*
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* Copyright 2018 Attila Kocsis. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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#include "bgfx_compute.sh"
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#include "uniforms.sh"
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SAMPLER2D(s_depthSource, 0);
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IMAGE2D_WR(s_target0, r16f, 1);
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IMAGE2D_WR(s_target1, r16f, 2);
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float ScreenSpaceToViewSpaceDepth( float screenDepth )
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{
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float depthLinearizeMul = u_depthUnpackConsts.x;
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float depthLinearizeAdd = u_depthUnpackConsts.y;
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// Optimised version of "-cameraClipNear / (cameraClipFar - projDepth * (cameraClipFar - cameraClipNear)) * cameraClipFar"
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// Set your depthLinearizeMul and depthLinearizeAdd to:
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// depthLinearizeMul = ( cameraClipFar * cameraClipNear) / ( cameraClipFar - cameraClipNear );
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// depthLinearizeAdd = cameraClipFar / ( cameraClipFar - cameraClipNear );
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return depthLinearizeMul / ( depthLinearizeAdd - screenDepth );
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}
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NUM_THREADS(8, 8, 1)
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void main()
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{
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uvec2 dtID = uvec2(gl_GlobalInvocationID.xy);
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uvec2 dim = imageSize(s_target0).xy;
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if (all(lessThan(dtID.xy, dim) ) )
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{
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ivec2 baseCoord = ivec2(dtID.xy) * 2;
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#if BGFX_SHADER_LANGUAGE_GLSL
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float a = texelFetch(s_depthSource, baseCoord + ivec2( 0, 1 ), 0).x;
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float d = texelFetch(s_depthSource, baseCoord + ivec2( 1, 0 ), 0).x;
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#else
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float a = texelFetch(s_depthSource, baseCoord + ivec2( 0, 0 ), 0).x;
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float d = texelFetch(s_depthSource, baseCoord + ivec2( 1, 1 ), 0).x;
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#endif
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imageStore(s_target0, ivec2(dtID.xy), ScreenSpaceToViewSpaceDepth( a ).xxxx);
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imageStore(s_target1, ivec2(dtID.xy), ScreenSpaceToViewSpaceDepth( d ).xxxx);
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}
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}
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