From my understanding, it's perfectly valid to assign texture and
samplers to specific texture and sampler slots from within the
technique declaration as such:
technique Foo
{
pass P0
{
Texture[ 0 ] = (g_ShadowDepthBuffer0);
Texture[ 1 ] = (g_ShadowDepthBuffer1);
Texture[ 2 ] = (g_ShadowDepthBuffer2);
Texture[ 3 ] = (g_ShadowDepthBuffer3);
Texture[ 4 ] = (g_ShadowDepthBuffer4);
Texture[ 5 ] = (g_ShadowDepthBuffer5);
Sampler[ 0 ] = (ShadowDepthSampler0);
Sampler[ 1 ] = (ShadowDepthSampler1);
Sampler[ 2 ] = (ShadowDepthSampler2);
Sampler[ 3 ] = (ShadowDepthSampler3);
Sampler[ 4 ] = (ShadowDepthSampler4);
Sampler[ 5 ] = (ShadowDepthSampler5);
Texture[ 6 ] = (g_BaseMap);
Sampler[ 6 ] = (BaseMapSampler);
...
This allows you to set these textures and render states for these
textures and samplers via the traditional way:
pDevice->SetTexture( nSlotID, SomeRenderStateID, SomeRenderState );
pDevice->SetSamplerState( nSlotID, SomeRenderStateID, SomeRenderState);
etc.
Rather than pEffect->SetTexture( "TextureName", pTexture );
However, the HLSL compiler does not seem to be honoring my request to
bind these samplers to the sampler register I've specified. For
example, I specifically requested that the BaseMapSampler be bound to
Sampler[ 6 ], yet the HLSL compiler decided it was going to bind it to
sampler register s0 (see below).
Is this acceptable output, is it a bug, or is there some intermediate
linkage going on that I don't know about, that properly hooks up
sampler and texture registers to the C/C++ side of the API?
asm {
//
// Generated by Microsoft (R) D3DX9 Shader Compiler 9.12.589.0000
//
// Parameters:
//
// sampler2D BaseMapSampler;
// sampler2D ShadowDepthSampler0;
// sampler2D ShadowDepthSampler1;
// sampler2D ShadowDepthSampler2;
// sampler2D ShadowDepthSampler3;
// sampler2D ShadowDepthSampler4;
// sampler2D ShadowDepthSampler5;
// float2 g_MaterialProperties;
// float g_fShadowIntensity;
//
//
// Registers:
//
// Name Reg Size
// -------------------- ----- ----
// g_fShadowIntensity c0 1
// g_MaterialProperties c1 1
// BaseMapSampler s0 1
// ShadowDepthSampler0 s1 1
// ShadowDepthSampler1 s2 1
// ShadowDepthSampler2 s3 1
// ShadowDepthSampler3 s4 1
// ShadowDepthSampler4 s5 1
// ShadowDepthSampler5 s6 1
//
ps_2_0
def c2, 1, 0, 0, 0
dcl_pp t0.xyz
dcl_pp t1.xyz
dcl_pp t2.xyz
dcl_pp t3.xyz
dcl_pp t4.xyz
dcl_pp t5.xyz
dcl_pp t6.xy
dcl_2d s0
dcl_2d s1
dcl_2d s2
dcl_2d s3
dcl_2d s4
dcl_2d s5
dcl_2d s6
