array indexing issue in geom shader for selected hardware

[Priyank.Jain2]

In my geometry shader I am adding vertices using a function, something like this

void CreateVertex(int i, float uSign, float vSign)
{
    OUT_POSITION =  IN_GEOM_POSITION(i) +  IN_GEOM_POSITION(i).w * float4( uSign * uOffset + vSign * vOffset, 0, 0 );
    .
    .
    .

but shader is throwing error

ERROR: 0:1481: '[' : layout must be declared before indexing gl_in built-in array

 

Althogh exporting the shader shows correct output (glsl)

void CreateVertex(int i, float uSign, float vSign)
{
    gl_Position =  gl_in[i].gl_Position +  gl_in[i].gl_Position.w * vec4( uSign * uOffset + vSign * vOffset, 0, 0 );
    .
    .
    .

Also if I provide index directly then it is working fine IN_GEOM_POSITION(0). Am I missing something?

 

 

PS:

 

The error is present on following hardware: Intel® HD Graphics 4400, Surface Pro (Intel HD 4600).

But working fine on: NVIDIA Quadro K1100M

[silent]

Priyank.Jain2

 

That behavior can be also a sign of some GPU driver bug. Could you please provide a small reproducible test scene (can be even based on empty new project) and specify your SDK version?

 

Thanks!

[Priyank.Jain2]

Yes that may be the reason, Check list of GPU's we tried this on,

• Graphics API : OpenGL
• GPU Driver version:
  • Intel® HD Graphics 4400, driver 10.18.14.4432
  • Intel® HD Graphics 5000, driver 20.19.15.4331
  • Intel® HD Graphics family, driver 20.19.15.4483
  • Intel® HD Graphics 520, driver 20.19.15.453
• SDK version : 2.3.1

I will try to create a test sample, but that may took some time. Sorry for that.