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clamp result.depth to [0,1] if written to

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This commit is contained in:
Brian Paul 2006-08-25 19:45:31 +00:00
parent 439d59926a
commit 473f1aca7f
1 changed files with 6 additions and 1 deletions
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7
src/mesa/swrast/s_nvfragprog.c
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@ -1491,7 +1491,12 @@ _swrast_exec_fragment_program( GLcontext *ctx, struct sw_span *span )
if (program->Base.OutputsWritten & (1 << FRAG_RESULT_DEPR)) {
const GLfloat depth
= ctx->FragmentProgram.Machine.Outputs[FRAG_RESULT_DEPR][2];
span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF);
if (depth <= 0.0)
span->array->z[i] = 0;
else if (depth >= 1.0)
span->array->z[i] = ctx->DrawBuffer->_DepthMax;
else
span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF);
}
}
}