Difference between revisions of "Blending mode"

Revision as of 10:23, 9 August 2012

Blending mode

0 - no blending
1 - additive rendering instead of alpha
2 - diffusion color (col parameter in CVertex) adds to texture color, instead of multiplying
4 - like 2, but "smooth addition"
6 - multiplication & dividing by 2 after
8 - addition, then 127 is subtracted from each component

32 - disable alpha channel
64 - color of pixel is multiplied by target pixel color
128 - disable AA

it's in groups, flags 0,2,4,6,8, are choosing blending mode (color parameter target), everything else is just flags

 if (q->blend & 128)
 {
   pD3DDevice->SetRenderState( D3DRS_MULTISAMPLEANTIALIAS, FALSE );
 } else {
   pD3DDevice->SetRenderState( D3DRS_MULTISAMPLEANTIALIAS, TRUE );
 }
 }

 if (q->blend & 64)
 {
   pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ZERO);
   pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_SRCCOLOR);		 //col

 } else
 if (q->blend & 1)   //additive/replace
 {
   pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
   pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE);			//additive
 } else {
   pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
   pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);	   //aplha-blending
 };

 int difftype = q->blend & 14;
 if (difftype == 2)   //diffusion to addition
 {
   pD3DDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_ADD );
 } else if (difftype == 0) {                                                         //diffusion to modulation
   pD3DDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_MODULATE );
 } else if (difftype == 4) {                                                         //diffusion to smooth addition
   pD3DDevice->SetTextureStageS 
   pD3DDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_ADDSMOOTH );
 } else if (difftype == 6) {                                                         //diffusion to double modulation
   pD3DDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_MODULATE2X );
 } else if (difftype == 8) {                                                         //diffusion to signed addition
   pD3DDevice->SetTextureStageState( 0, D3DTSS_COLOROP,   D3DTOP_ADDSIGNED );
 };

 if (q->blend & 3)
 { 
 if (q->blend & 32)
 {
   pD3DDevice->SetRenderState( D3DRS_ALPHABLENDENABLE,   FALSE );
 } else {
   pD3DDevice->SetRenderState( D3DRS_ALPHABLENDENABLE,   TRUE );
 };

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