Hi,

I have a geometry shader (DirectX 10 SDK, June 2008), like the following:

#define MAXTEXCOORDS 8

struct VSOutput
{
    float4 pos:              SV_POSITION;
    float2 UV[MAXTEXCOORDS]: TEXCOORD;
};

int normalMapUVChannel;  // From 0 to 7

[maxvertexcount(3)]
void GS(triangle VSOutput input[3], inout TriangleStream<GSOutput> OutputStream)
{
    float DeltaU1 = input[2].UV[normalMapUVChannel].x - input[1].UV[normalMapUVChannel].x;

etc...

}

The shader compiler report the following errors:

error X8000: D3D10 Internal Compiler Error: Invalid Bytecode: Overlapping input index range decl encountered. Opcode #28 (count is 1-based).
error X8000: D3D10 Internal Compiler Error: Invalid Bytecode: Can't continue validation - aborting.

The error is generated by the first line. Note if I make the index constant, the error disappear:

float DeltaU1 = input[2].UV[0].x - input[1].UV[0].x;

but in this way I need to replicate the shader 8 times (that moreover it's already replicated for other reasons), that's quite a problem.

Someone know a workaround to this? Thanks in advance.

- AGPX

If you'd send me the shader at johnrapp@microsoft.com I can see about finding a workaround, or at least make sure it's fixed in a future compiler.

Hello,

I had send to you the shader.

Many thanks for your reply,

- AGPX

Barring any unforeseen circumstances, this issue should get fixed in the November release. In the meantime, a workaround is to make the vertex indices dynamic as well as the interior index (ie, vert[someindex].tex[otherindex]).

Oh! Your workaround of dynamic index works! Many many thanks!