HLSL and ID3DXFont/ID3DXSprite

Question

I've started at the beginning, and my code will capably display the grand total of some text. I've been adding support for sprites. The trouble that I've run in to, is that it doesn't seem to recognize my HLSL. I set the technique, began it, began the pass, drew the sprites, flushed them, ended the pass, the technique. And D3D comes up with this little "Using FF to PS converter" in the VS output. Same for VS. I'm not trying to do anything advanced with my HLSL - just use it and get a little more familiar with it and make sure I know how to implement it. That's C++0x auto, by the way, so automatic type deduction (because I'm lazy).

#define D3DCALL(a) { auto __ = a; if (FAILED(__)) DXTrace(__FILE__, __LINE__, __, WIDEN(#a), TRUE); }

D3DCALL(spriteeffect->SetTechnique(spritetechnique));
D3DCALL(spriteeffect->Begin(&passes, NULL));
D3DCALL(spriteeffect->BeginPass(0)); // We know this is zero.
D3DCALL(sprite->Begin(D3DXSPRITE_OBJECTSPACE | D3DXSPRITE_DO_NOT_ADDREF_TEXTURE | D3DXSPRITE_SORT_TEXTURE | D3DXSPRITE_ALPHABLEND | D3DXSPRITE_SORT_DEPTH_FRONTTOBACK));
RenderAndCleanUp(common->sprites);
D3DCALL(sprite->End());
D3DCALL(spriteeffect->EndPass());
D3DCALL(spriteeffect->End());

where RenderAndCleanUp is a simple templated function that loops through the sprites, destroys those that need to be, and renders the rest, and common->sprites is a simple vector of all the sprite objects. Since DXTrace never goes off, I'll guarantee that none of the functions fail. I've also set the control panel to max debugging.

I checked the D3DXHANDLEs and they're all non-NULL. It doesn't report any compilation errors, or any errors or warnings.

// Contains the HLSL for sprites.

// Based on transform.fx, by Frank Luna.

// FX parameter (global variable to the shader).
uniform extern float4x4 gWVP;

// Structure
struct OutputVS
{
      float4 posH : POSITION0;
float4 color : COLOR0;
};

// Vertex shader
OutputVS SpriteVS(float3 post : POSITION0,
    float4 col : COLOR0)
{
  // Zero out our output.
  OutputVS outVS = (OutputVS)0;

  outVS.posH = mul(float4(post, 1.0f), gWVP); // Transform
   outVS.color = col;

  // Done--return the output.
  return outVS;
}

// Pixel shader - take the original colour of the pixel and just return it. Nothing fancy.
float4 SpritePS( float4 col : COLOR0 ) : COLOR
{
   return col;
}

technique Sprite
{
  pass P0
  {
        // Specify the vertex and pixel shader associated
        // with this pass.
        vertexShader = compile vs_3_0 SpriteVS();
        pixelShader  = compile ps_3_0 SpritePS();
  }
}

This is native C++ looking at Direct3D9.

You don't seem to say exactly how it's failing to work as you expect unless I missed it... — jcoder
Because they're not actually loading or calling the HLSL in any way. They just use FF. For example, I modified the pixel shader to always return blue, but there was no effect. — DeadMG

Niello Niello · Accepted Answer · 2014-09-13T21:55:51

AFAIR D3DXSprite and D3DXFont rendering is implemented inside of D3DX itself. So, it sets its own shaders, states (emulates fixed-function pipeline) and renders text/sprites. So, your shaders and states have no effect on these objects. You may implement your own text/sprite rendering subsystem, it's not so hard. Another vote for this is that Microsoft officially deprecated D3DX.

HLSL and ID3DXFont/ID3DXSprite

1 Answers