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Workbench: Shadow: Add geometry instancing extension. 

This give a very slight perf boost. (2ms gain over 67ms total in my test)
This commit is contained in:
Clément Foucault 2018-05-19 18:23:29 +02:00
parent 24cc976d55
commit ef90d46700
1 changed files with 29 additions and 11 deletions
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40
source/blender/draw/engines/workbench/shaders/workbench_shadow_geom.glsl
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@ -1,5 +1,12 @@
#extension GL_ARB_gpu_shader5 : enable
#ifdef GL_ARB_gpu_shader5
layout(lines_adjacency, invocations = 2) in;
layout(triangle_strip, max_vertices = 4) out;
#else
layout(lines_adjacency) in;
layout(triangle_strip, max_vertices = 8) out;
#endif
uniform mat4 ModelMatrixInverse;
@ -15,6 +22,16 @@ in VertexData {
#define len_sqr(a) dot(a, a)
void extrude_edge(bool invert)
{
ivec2 idx = (invert) ? ivec2(2, 1) : ivec2(1, 2);
gl_Position = vData[idx.x].frontPosition; EmitVertex();
gl_Position = vData[idx.y].frontPosition; EmitVertex();
gl_Position = vData[idx.x].backPosition; EmitVertex();
gl_Position = vData[idx.y].backPosition; EmitVertex();
EndPrimitive();
}
void main()
{
/* TODO precompute light_direction */
@ -61,18 +78,19 @@ void main()
ivec2 idx = ivec2(1, 2);
idx = (backface.x) ? idx.yx : idx.xy;
gl_Position = vData[idx.x].frontPosition; EmitVertex();
gl_Position = vData[idx.y].frontPosition; EmitVertex();
gl_Position = vData[idx.x].backPosition; EmitVertex();
gl_Position = vData[idx.y].backPosition; EmitVertex();
EndPrimitive();
#ifdef GL_ARB_gpu_shader5
if (gl_InvocationID == 0) {
extrude_edge(backface.x);
}
else if (is_manifold) {
/* Increment/Decrement twice for manifold edges. */
extrude_edge(backface.x);
}
#else
extrude_edge(backface.x);
/* Increment/Decrement twice for manifold edges. */
if (is_manifold) {
gl_Position = vData[idx.x].frontPosition; EmitVertex();
gl_Position = vData[idx.y].frontPosition; EmitVertex();
gl_Position = vData[idx.x].backPosition; EmitVertex();
gl_Position = vData[idx.y].backPosition; EmitVertex();
EndPrimitive();
extrude_edge(backface.x);
}
#endif
}