r200_state.c

mesa-6.5-minigui源码

      rmesa->hw.vtx.cmd[VTX_TCL_OUTPUT_VTXFMT_0] |= 
	 ((R200_VTX_FP_RGBA << R200_VTX_COLOR_1_SHIFT));	
      rmesa->hw.vtx.cmd[VTX_TCL_OUTPUT_COMPSEL] |= R200_OUTPUT_COLOR_1;
   }

   if ( rmesa->hw.ctx.cmd[CTX_PP_CNTL] != p ) {
      R200_STATECHANGE( rmesa, ctx );
      rmesa->hw.ctx.cmd[CTX_PP_CNTL] = p;
   }

   /* Update vertex/render formats
    */
   if (rmesa->TclFallback) { 
      r200ChooseRenderState( ctx );
      r200ChooseVertexState( ctx );
   }
}


/* =============================================================
 * Materials
 */


/* Update on colormaterial, material emmissive/ambient, 
 * lightmodel.globalambient
 */
static void update_global_ambient( GLcontext *ctx )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   float *fcmd = (float *)R200_DB_STATE( glt );

   /* Need to do more if both emmissive & ambient are PREMULT:
    * I believe this is not nessary when using source_material. This condition thus
    * will never happen currently, and the function has no dependencies on materials now
    */
   if ((rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_1] &
       ((3 << R200_FRONT_EMISSIVE_SOURCE_SHIFT) |
	(3 << R200_FRONT_AMBIENT_SOURCE_SHIFT))) == 0) 
   {
      COPY_3V( &fcmd[GLT_RED], 
	       ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION]);
      ACC_SCALE_3V( &fcmd[GLT_RED],
		   ctx->Light.Model.Ambient,
		   ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT]);
   } 
   else
   {
      COPY_3V( &fcmd[GLT_RED], ctx->Light.Model.Ambient );
   }
   
   R200_DB_STATECHANGE(rmesa, &rmesa->hw.glt);
}

/* Update on change to 
 *    - light[p].colors
 *    - light[p].enabled
 */
static void update_light_colors( GLcontext *ctx, GLuint p )
{
   struct gl_light *l = &ctx->Light.Light[p];

/*     fprintf(stderr, "%s\n", __FUNCTION__); */

   if (l->Enabled) {
      r200ContextPtr rmesa = R200_CONTEXT(ctx);
      float *fcmd = (float *)R200_DB_STATE( lit[p] );

      COPY_4V( &fcmd[LIT_AMBIENT_RED], l->Ambient );	 
      COPY_4V( &fcmd[LIT_DIFFUSE_RED], l->Diffuse );
      COPY_4V( &fcmd[LIT_SPECULAR_RED], l->Specular );
      
      R200_DB_STATECHANGE( rmesa, &rmesa->hw.lit[p] );
   }
}

static void r200ColorMaterial( GLcontext *ctx, GLenum face, GLenum mode )
{
      r200ContextPtr rmesa = R200_CONTEXT(ctx);
      GLuint light_model_ctl1 = rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_1];
      light_model_ctl1 &= ~((0xf << R200_FRONT_EMISSIVE_SOURCE_SHIFT) |
			   (0xf << R200_FRONT_AMBIENT_SOURCE_SHIFT) |
			   (0xf << R200_FRONT_DIFFUSE_SOURCE_SHIFT) |
		   (0xf << R200_FRONT_SPECULAR_SOURCE_SHIFT) |
		   (0xf << R200_BACK_EMISSIVE_SOURCE_SHIFT) |
		   (0xf << R200_BACK_AMBIENT_SOURCE_SHIFT) |
		   (0xf << R200_BACK_DIFFUSE_SOURCE_SHIFT) |
		   (0xf << R200_BACK_SPECULAR_SOURCE_SHIFT));

   if (ctx->Light.ColorMaterialEnabled) {
      GLuint mask = ctx->Light.ColorMaterialBitmask;
   
      if (mask & MAT_BIT_FRONT_EMISSION) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_FRONT_EMISSIVE_SOURCE_SHIFT);
      }
      else
	 light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_0 <<
			     R200_FRONT_EMISSIVE_SOURCE_SHIFT);

      if (mask & MAT_BIT_FRONT_AMBIENT) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_FRONT_AMBIENT_SOURCE_SHIFT);
      }
      else
         light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_0 <<
			     R200_FRONT_AMBIENT_SOURCE_SHIFT);
	 
      if (mask & MAT_BIT_FRONT_DIFFUSE) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_FRONT_DIFFUSE_SOURCE_SHIFT);
      }
      else
         light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_0 <<
			     R200_FRONT_DIFFUSE_SOURCE_SHIFT);
   
      if (mask & MAT_BIT_FRONT_SPECULAR) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_FRONT_SPECULAR_SOURCE_SHIFT);
      }
      else {
         light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_0 <<
			     R200_FRONT_SPECULAR_SOURCE_SHIFT);
      }
   
      if (mask & MAT_BIT_BACK_EMISSION) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_BACK_EMISSIVE_SOURCE_SHIFT);
      }

      else light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_1 <<
			     R200_BACK_EMISSIVE_SOURCE_SHIFT);

      if (mask & MAT_BIT_BACK_AMBIENT) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_BACK_AMBIENT_SOURCE_SHIFT);
      }
      else light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_1 <<
			     R200_BACK_AMBIENT_SOURCE_SHIFT);

      if (mask & MAT_BIT_BACK_DIFFUSE) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_BACK_DIFFUSE_SOURCE_SHIFT);
   }
      else light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_1 <<
			     R200_BACK_DIFFUSE_SOURCE_SHIFT);

      if (mask & MAT_BIT_BACK_SPECULAR) {
	 light_model_ctl1 |= (R200_LM1_SOURCE_VERTEX_COLOR_0 <<
			     R200_BACK_SPECULAR_SOURCE_SHIFT);
      }
      else {
         light_model_ctl1 |= (R200_LM1_SOURCE_MATERIAL_1 <<
			     R200_BACK_SPECULAR_SOURCE_SHIFT);
      }
      }
   else {
       /* Default to SOURCE_MATERIAL:
        */
     light_model_ctl1 |=
        (R200_LM1_SOURCE_MATERIAL_0 << R200_FRONT_EMISSIVE_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_0 << R200_FRONT_AMBIENT_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_0 << R200_FRONT_DIFFUSE_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_0 << R200_FRONT_SPECULAR_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_1 << R200_BACK_EMISSIVE_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_1 << R200_BACK_AMBIENT_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_1 << R200_BACK_DIFFUSE_SOURCE_SHIFT) |
        (R200_LM1_SOURCE_MATERIAL_1 << R200_BACK_SPECULAR_SOURCE_SHIFT);
   }

   if (light_model_ctl1 != rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_1]) {
      R200_STATECHANGE( rmesa, tcl );
      rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_1] = light_model_ctl1;
   }
   
   
}

void r200UpdateMaterial( GLcontext *ctx )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   GLfloat (*mat)[4] = ctx->Light.Material.Attrib;
   GLfloat *fcmd = (GLfloat *)R200_DB_STATE( mtl[0] );
   GLfloat *fcmd2 = (GLfloat *)R200_DB_STATE( mtl[1] );
   GLuint mask = ~0;
   
   /* Might be possible and faster to update everything unconditionally? */
   if (ctx->Light.ColorMaterialEnabled)
      mask &= ~ctx->Light.ColorMaterialBitmask;

   if (R200_DEBUG & DEBUG_STATE)
      fprintf(stderr, "%s\n", __FUNCTION__);

   if (mask & MAT_BIT_FRONT_EMISSION) {
      fcmd[MTL_EMMISSIVE_RED]   = mat[MAT_ATTRIB_FRONT_EMISSION][0];
      fcmd[MTL_EMMISSIVE_GREEN] = mat[MAT_ATTRIB_FRONT_EMISSION][1];
      fcmd[MTL_EMMISSIVE_BLUE]  = mat[MAT_ATTRIB_FRONT_EMISSION][2];
      fcmd[MTL_EMMISSIVE_ALPHA] = mat[MAT_ATTRIB_FRONT_EMISSION][3];
   }
   if (mask & MAT_BIT_FRONT_AMBIENT) {
      fcmd[MTL_AMBIENT_RED]     = mat[MAT_ATTRIB_FRONT_AMBIENT][0];
      fcmd[MTL_AMBIENT_GREEN]   = mat[MAT_ATTRIB_FRONT_AMBIENT][1];
      fcmd[MTL_AMBIENT_BLUE]    = mat[MAT_ATTRIB_FRONT_AMBIENT][2];
      fcmd[MTL_AMBIENT_ALPHA]   = mat[MAT_ATTRIB_FRONT_AMBIENT][3];
   }
   if (mask & MAT_BIT_FRONT_DIFFUSE) {
      fcmd[MTL_DIFFUSE_RED]     = mat[MAT_ATTRIB_FRONT_DIFFUSE][0];
      fcmd[MTL_DIFFUSE_GREEN]   = mat[MAT_ATTRIB_FRONT_DIFFUSE][1];
      fcmd[MTL_DIFFUSE_BLUE]    = mat[MAT_ATTRIB_FRONT_DIFFUSE][2];
      fcmd[MTL_DIFFUSE_ALPHA]   = mat[MAT_ATTRIB_FRONT_DIFFUSE][3];
   }
   if (mask & MAT_BIT_FRONT_SPECULAR) {
      fcmd[MTL_SPECULAR_RED]    = mat[MAT_ATTRIB_FRONT_SPECULAR][0];
      fcmd[MTL_SPECULAR_GREEN]  = mat[MAT_ATTRIB_FRONT_SPECULAR][1];
      fcmd[MTL_SPECULAR_BLUE]   = mat[MAT_ATTRIB_FRONT_SPECULAR][2];
      fcmd[MTL_SPECULAR_ALPHA]  = mat[MAT_ATTRIB_FRONT_SPECULAR][3];
   }
   if (mask & MAT_BIT_FRONT_SHININESS) {
      fcmd[MTL_SHININESS]       = mat[MAT_ATTRIB_FRONT_SHININESS][0];
   }

   if (mask & MAT_BIT_BACK_EMISSION) {
      fcmd2[MTL_EMMISSIVE_RED]   = mat[MAT_ATTRIB_BACK_EMISSION][0];
      fcmd2[MTL_EMMISSIVE_GREEN] = mat[MAT_ATTRIB_BACK_EMISSION][1];
      fcmd2[MTL_EMMISSIVE_BLUE]  = mat[MAT_ATTRIB_BACK_EMISSION][2];
      fcmd2[MTL_EMMISSIVE_ALPHA] = mat[MAT_ATTRIB_BACK_EMISSION][3];
   }
   if (mask & MAT_BIT_BACK_AMBIENT) {
      fcmd2[MTL_AMBIENT_RED]     = mat[MAT_ATTRIB_BACK_AMBIENT][0];
      fcmd2[MTL_AMBIENT_GREEN]   = mat[MAT_ATTRIB_BACK_AMBIENT][1];
      fcmd2[MTL_AMBIENT_BLUE]    = mat[MAT_ATTRIB_BACK_AMBIENT][2];
      fcmd2[MTL_AMBIENT_ALPHA]   = mat[MAT_ATTRIB_BACK_AMBIENT][3];
   }
   if (mask & MAT_BIT_BACK_DIFFUSE) {
      fcmd2[MTL_DIFFUSE_RED]     = mat[MAT_ATTRIB_BACK_DIFFUSE][0];
      fcmd2[MTL_DIFFUSE_GREEN]   = mat[MAT_ATTRIB_BACK_DIFFUSE][1];
      fcmd2[MTL_DIFFUSE_BLUE]    = mat[MAT_ATTRIB_BACK_DIFFUSE][2];
      fcmd2[MTL_DIFFUSE_ALPHA]   = mat[MAT_ATTRIB_BACK_DIFFUSE][3];
   }
   if (mask & MAT_BIT_BACK_SPECULAR) {
      fcmd2[MTL_SPECULAR_RED]    = mat[MAT_ATTRIB_BACK_SPECULAR][0];
      fcmd2[MTL_SPECULAR_GREEN]  = mat[MAT_ATTRIB_BACK_SPECULAR][1];
      fcmd2[MTL_SPECULAR_BLUE]   = mat[MAT_ATTRIB_BACK_SPECULAR][2];
      fcmd2[MTL_SPECULAR_ALPHA]  = mat[MAT_ATTRIB_BACK_SPECULAR][3];
   }
   if (mask & MAT_BIT_BACK_SHININESS) {
      fcmd2[MTL_SHININESS]       = mat[MAT_ATTRIB_BACK_SHININESS][0];
   }

   R200_DB_STATECHANGE( rmesa, &rmesa->hw.mtl[0] );
   R200_DB_STATECHANGE( rmesa, &rmesa->hw.mtl[1] );

   /* currently material changes cannot trigger a global ambient change, I believe this is correct
    update_global_ambient( ctx ); */
}

/* _NEW_LIGHT
 * _NEW_MODELVIEW
 * _MESA_NEW_NEED_EYE_COORDS
 *
 * Uses derived state from mesa:
 *       _VP_inf_norm
 *       _h_inf_norm
 *       _Position
 *       _NormDirection
 *       _ModelViewInvScale
 *       _NeedEyeCoords
 *       _EyeZDir
 *
 * which are calculated in light.c and are correct for the current
 * lighting space (model or eye), hence dependencies on _NEW_MODELVIEW
 * and _MESA_NEW_NEED_EYE_COORDS.  
 */
static void update_light( GLcontext *ctx )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);

   /* Have to check these, or have an automatic shortcircuit mechanism
    * to remove noop statechanges. (Or just do a better job on the
    * front end).
    */
   {
      GLuint tmp = rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_0];

      if (ctx->_NeedEyeCoords)
	 tmp &= ~R200_LIGHT_IN_MODELSPACE;
      else
	 tmp |= R200_LIGHT_IN_MODELSPACE;
      
      if (tmp != rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_0]) 
      {
	 R200_STATECHANGE( rmesa, tcl );
	 rmesa->hw.tcl.cmd[TCL_LIGHT_MODEL_CTL_0] = tmp;
      }
   }

   {
      GLfloat *fcmd = (GLfloat *)R200_DB_STATE( eye );
      fcmd[EYE_X] = ctx->_EyeZDir[0];
      fcmd[EYE_Y] = ctx->_EyeZDir[1];
      fcmd[EYE_Z] = - ctx->_EyeZDir[2];
      fcmd[EYE_RESCALE_FACTOR] = ctx->_ModelViewInvScale;
      R200_DB_STATECHANGE( rmesa, &rmesa->hw.eye );
   }



   if (ctx->Light.Enabled) {
      GLint p;
      for (p = 0 ; p < MAX_LIGHTS; p++) {
	 if (ctx->Light.Light[p].Enabled) {
	    struct gl_light *l = &ctx->Light.Light[p];
	    GLfloat *fcmd = (GLfloat *)R200_DB_STATE( lit[p] );
	    
	    if (l->EyePosition[3] == 0.0) {
	       COPY_3FV( &fcmd[LIT_POSITION_X], l->_VP_inf_norm ); 
	       COPY_3FV( &fcmd[LIT_DIRECTION_X], l->_h_inf_norm ); 
	       fcmd[LIT_POSITION_W] = 0;
	       fcmd[LIT_DIRECTION_W] = 0;
	    } else {
	       COPY_4V( &fcmd[LIT_POSITION_X], l->_Position );
	       fcmd[LIT_DIRECTION_X] = -l->_NormDirection[0];
	       fcmd[LIT_DIRECTION_Y] = -l->_NormDirection[1];
	       fcmd[LIT_DIRECTION_Z] = -l->_NormDirection[2];
	       fcmd[LIT_DIRECTION_W] = 0;
	    }

	    R200_DB_STATECHANGE( rmesa, &rmesa->hw.lit[p] );
	 }
      }
   }
}

static void r200Lightfv( GLcontext *ctx, GLenum light,
			   GLenum pname, const GLfloat *params )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   GLint p = light - GL_LIGHT0;
   struct gl_light *l = &ctx->Light.Light[p];
   GLfloat *fcmd = (GLfloat *)rmesa->hw.lit[p].cmd;
   

   switch (pname) {
   case GL_AMBIENT:		
   case GL_DIFFUSE:
   case GL_SPECULAR:
      update_light_colors( ctx, p );
      break;

   case GL_SPOT_DIRECTION: 
      /* picked up in update_light */	
      break;

   case GL_POSITION: {
      /* positions picked up in update_light, but can do flag here */	
      GLuint flag = (p&1)? R200_LIGHT_1_IS_LOCAL : R200_LIGHT_0_IS_LOCAL;
      GLuint idx = TCL_PER_LIGHT_CTL_0 + p/2;

      R200_STATECHANGE(rmesa, tcl);
      if (l->EyePosition[3] != 0.0F)
	 rmesa->hw.tcl.cmd[idx] |= flag;
      else
	 rmesa->hw.tcl.cmd[idx] &= ~flag;
      break;
   }

   case GL_SPOT_EXPONENT:
      R200_STATECHANGE(rmesa, lit[p]);
      fcmd[LIT_SPOT_EXPONENT] = params[0];
      break;

   case GL_SPOT_CUTOFF: {
      GLuint flag = (p&1) ? R200_LIGHT_1_IS_SPOT : R200_LIGHT_0_IS_SPOT;
      GLuint idx = TCL_PER_LIGHT_CTL_0 + p/2;

      R200_STATECHANGE(rmesa, lit[p]);
      fcmd[LIT_SPOT_CUTOFF] = l->_CosCutoff;

      R200_STATECHANGE(rmesa, tcl);
      if (l->SpotCutoff != 180.0F)
	 rmesa->hw.tcl.cmd[idx] |= flag;
      else
	 rmesa->hw.tcl.cmd[idx] &= ~flag;

      break;
   }

   case GL_CONSTANT_ATTENUATION:
      R200_STATECHANGE(rmesa, lit[p]);
      fcmd[LIT_ATTEN_CONST] = params[0];
      if ( params[0] == 0.0 )
	 fcmd[LIT_ATTEN_CONST_INV] = FLT_MAX;
      else
	 fcmd[LIT_ATTEN_CONST_INV] = 1.0 / params[0];
      break;
   case GL_LINEAR_ATTENUATION:
      R200_STATECHANGE(rmesa, lit[p]);
      fcmd[LIT_ATTEN_LINEAR] = params[0];
      break;
   case GL_QUADRATIC_ATTENUATION:
      R200_STATECHANGE(rmesa, lit[p]);
      fcmd[LIT_ATTEN_QUADRATIC] = params[0];
      break;
   default:
      return;
   }

   /* Set RANGE_ATTEN only when needed */
   switch (pname) {
   case GL_POSITION:
   case GL_CONSTANT_ATTENUATION:
   case GL_LINEAR_ATTENUATION:
   case GL_QUADRATIC_ATTENUATION: {
      GLuint *icmd = (GLuint *)R200_DB_STATE( tcl );
      GLuint idx = TCL_PER_LIGHT_CTL_0 + p/2;
      GLuint atten_flag = ( p&1 ) ? R200_LIGHT_1_ENABLE_RANGE_ATTEN
				  : R200_LIGHT_0_ENABLE_RANGE_ATTEN;
      GLuint atten_const_flag = ( p&1 ) ? R200_LIGHT_1_CONSTANT_RANGE_ATTEN
				  : R200_LIGHT_0_CONSTANT_RANGE_ATTEN;

      if ( l->EyePosition[3] == 0.0F ||
	   ( ( fcmd[LIT_ATTEN_CONST] == 0.0 || fcmd[LIT_ATTEN_CONST] == 1.0 ) &&
	     fcmd[LIT_ATTEN_QUADRATIC] == 0.0 && fcmd[LIT_ATTEN_LINEAR] == 0.0 ) ) {
	 /* Disable attenuation */
	 icmd[idx] &= ~atten_flag;
      } else {
	 if ( fcmd[LIT_ATTEN_QUADRATIC] == 0.0 && fcmd[LIT_ATTEN_LINEAR] == 0.0 ) {
	    /* Enable only constant portion of attenuation calculation */
	    icmd[idx] |= ( atten_flag | atten_const_flag );
	 } else {
	    /* Enable full attenuation calculation */
	    icmd[idx] &= ~atten_const_flag;
	    icmd[idx] |= atten_flag;
	 }
      }

      R200_DB_STATECHANGE( rmesa, &rmesa->hw.tcl );
      break;