radeon_texstate.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

{
   RADEON_ALPHA_ARG_A_CURRENT_ALPHA,
   RADEON_ALPHA_ARG_A_CURRENT_ALPHA | RADEON_COMP_ARG_A
};

/* GL_ZERO table - indices 0-1
 * GL_ONE  table - indices 1-2
 */
static GLuint radeon_zero_alpha[] =
{
   RADEON_ALPHA_ARG_A_ZERO,
   RADEON_ALPHA_ARG_A_ZERO | RADEON_COMP_ARG_A,
   RADEON_ALPHA_ARG_A_ZERO
};


/* Extract the arg from slot A, shift it into the correct argument slot
 * and set the corresponding complement bit.
 */
#define RADEON_COLOR_ARG( n, arg )			\
do {							\
   color_combine |=					\
      ((color_arg[n] & RADEON_COLOR_ARG_MASK)		\
       << RADEON_COLOR_ARG_##arg##_SHIFT);		\
   color_combine |=					\
      ((color_arg[n] >> RADEON_COMP_ARG_SHIFT)		\
       << RADEON_COMP_ARG_##arg##_SHIFT);		\
} while (0)

#define RADEON_ALPHA_ARG( n, arg )			\
do {							\
   alpha_combine |=					\
      ((alpha_arg[n] & RADEON_ALPHA_ARG_MASK)		\
       << RADEON_ALPHA_ARG_##arg##_SHIFT);		\
   alpha_combine |=					\
      ((alpha_arg[n] >> RADEON_COMP_ARG_SHIFT)		\
       << RADEON_COMP_ARG_##arg##_SHIFT);		\
} while (0)


/* ================================================================
 * Texture unit state management
 */

static GLboolean radeonUpdateTextureEnv( GLcontext *ctx, int unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   GLuint color_combine, alpha_combine;
   const GLuint color_combine0 = RADEON_COLOR_ARG_A_ZERO | RADEON_COLOR_ARG_B_ZERO
         | RADEON_COLOR_ARG_C_CURRENT_COLOR | RADEON_BLEND_CTL_ADD
         | RADEON_SCALE_1X | RADEON_CLAMP_TX;
   const GLuint alpha_combine0 = RADEON_ALPHA_ARG_A_ZERO | RADEON_ALPHA_ARG_B_ZERO
         | RADEON_ALPHA_ARG_C_CURRENT_ALPHA | RADEON_BLEND_CTL_ADD
         | RADEON_SCALE_1X | RADEON_CLAMP_TX;


   /* texUnit->_Current can be NULL if and only if the texture unit is
    * not actually enabled.
    */
   assert( (texUnit->_ReallyEnabled == 0)
	   || (texUnit->_Current != NULL) );

   if ( RADEON_DEBUG & DEBUG_TEXTURE ) {
      fprintf( stderr, "%s( %p, %d )\n", __FUNCTION__, (void *)ctx, unit );
   }

   /* Set the texture environment state.  Isn't this nice and clean?
    * The chip will automagically set the texture alpha to 0xff when
    * the texture format does not include an alpha component. This
    * reduces the amount of special-casing we have to do, alpha-only
    * textures being a notable exception. Doesn't work for luminance
    * textures realized with I8 and ALPHA_IN_MAP not set neither (on r100).
    */
    /* Don't cache these results.
    */
   rmesa->state.texture.unit[unit].format = 0;
   rmesa->state.texture.unit[unit].envMode = 0;

   if ( !texUnit->_ReallyEnabled ) {
      color_combine = color_combine0;
      alpha_combine = alpha_combine0;
   }
   else {
      GLuint color_arg[3], alpha_arg[3];
      GLuint i;
      const GLuint numColorArgs = texUnit->_CurrentCombine->_NumArgsRGB;
      const GLuint numAlphaArgs = texUnit->_CurrentCombine->_NumArgsA;
      GLuint RGBshift = texUnit->_CurrentCombine->ScaleShiftRGB;
      GLuint Ashift = texUnit->_CurrentCombine->ScaleShiftA;


      /* Step 1:
       * Extract the color and alpha combine function arguments.
       */
      for ( i = 0 ; i < numColorArgs ; i++ ) {
	 const GLint op = texUnit->_CurrentCombine->OperandRGB[i] - GL_SRC_COLOR;
	 const GLuint srcRGBi = texUnit->_CurrentCombine->SourceRGB[i];
	 assert(op >= 0);
	 assert(op <= 3);
	 switch ( srcRGBi ) {
	 case GL_TEXTURE:
	    if (texUnit->_Current->Image[0][0]->_BaseFormat == GL_ALPHA)
	       color_arg[i] = radeon_zero_color[op];
	    else
	       color_arg[i] = radeon_texture_color[op][unit];
	    break;
	 case GL_CONSTANT:
	    color_arg[i] = radeon_tfactor_color[op];
	    break;
	 case GL_PRIMARY_COLOR:
	    color_arg[i] = radeon_primary_color[op];
	    break;
	 case GL_PREVIOUS:
	    color_arg[i] = radeon_previous_color[op];
	    break;
	 case GL_ZERO:
	    color_arg[i] = radeon_zero_color[op];
	    break;
	 case GL_ONE:
	    color_arg[i] = radeon_zero_color[op+1];
	    break;
	 case GL_TEXTURE0:
	 case GL_TEXTURE1:
	 case GL_TEXTURE2: {
	    GLuint txunit = srcRGBi - GL_TEXTURE0;
	    if (ctx->Texture.Unit[txunit]._Current->Image[0][0]->_BaseFormat == GL_ALPHA)
	       color_arg[i] = radeon_zero_color[op];
	    else
	 /* implement ogl 1.4/1.5 core spec here, not specification of
	  * GL_ARB_texture_env_crossbar (which would require disabling blending
	  * instead of undefined results when referencing not enabled texunit) */
	      color_arg[i] = radeon_texture_color[op][txunit];
	    }
	    break;
	 default:
	    return GL_FALSE;
	 }
      }

      for ( i = 0 ; i < numAlphaArgs ; i++ ) {
	 const GLint op = texUnit->_CurrentCombine->OperandA[i] - GL_SRC_ALPHA;
	 const GLuint srcAi = texUnit->_CurrentCombine->SourceA[i];
	 assert(op >= 0);
	 assert(op <= 1);
	 switch ( srcAi ) {
	 case GL_TEXTURE:
	    if (texUnit->_Current->Image[0][0]->_BaseFormat == GL_LUMINANCE)
	       alpha_arg[i] = radeon_zero_alpha[op+1];
	    else
	       alpha_arg[i] = radeon_texture_alpha[op][unit];
	    break;
	 case GL_CONSTANT:
	    alpha_arg[i] = radeon_tfactor_alpha[op];
	    break;
	 case GL_PRIMARY_COLOR:
	    alpha_arg[i] = radeon_primary_alpha[op];
	    break;
	 case GL_PREVIOUS:
	    alpha_arg[i] = radeon_previous_alpha[op];
	    break;
	 case GL_ZERO:
	    alpha_arg[i] = radeon_zero_alpha[op];
	    break;
	 case GL_ONE:
	    alpha_arg[i] = radeon_zero_alpha[op+1];
	    break;
	 case GL_TEXTURE0:
	 case GL_TEXTURE1:
	 case GL_TEXTURE2: {    
	    GLuint txunit = srcAi - GL_TEXTURE0;
	    if (ctx->Texture.Unit[txunit]._Current->Image[0][0]->_BaseFormat == GL_LUMINANCE)
	       alpha_arg[i] = radeon_zero_alpha[op+1];
	    else
	       alpha_arg[i] = radeon_texture_alpha[op][txunit];
	    }
	    break;
	 default:
	    return GL_FALSE;
	 }
      }

      /* Step 2:
       * Build up the color and alpha combine functions.
       */
      switch ( texUnit->_CurrentCombine->ModeRGB ) {
      case GL_REPLACE:
	 color_combine = (RADEON_COLOR_ARG_A_ZERO |
			  RADEON_COLOR_ARG_B_ZERO |
			  RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, C );
	 break;
      case GL_MODULATE:
	 color_combine = (RADEON_COLOR_ARG_C_ZERO |
			  RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, B );
	 break;
      case GL_ADD:
	 color_combine = (RADEON_COLOR_ARG_B_ZERO |
			  RADEON_COMP_ARG_B |
			  RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, C );
	 break;
      case GL_ADD_SIGNED:
	 color_combine = (RADEON_COLOR_ARG_B_ZERO |
			  RADEON_COMP_ARG_B |
			  RADEON_BLEND_CTL_ADDSIGNED |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, C );
	 break;
      case GL_SUBTRACT:
	 color_combine = (RADEON_COLOR_ARG_B_ZERO |
			  RADEON_COMP_ARG_B |
			  RADEON_BLEND_CTL_SUBTRACT |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, C );
	 break;
      case GL_INTERPOLATE:
	 color_combine = (RADEON_BLEND_CTL_BLEND |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, B );
	 RADEON_COLOR_ARG( 1, A );
	 RADEON_COLOR_ARG( 2, C );
	 break;

      case GL_DOT3_RGB_EXT:
      case GL_DOT3_RGBA_EXT:
	 /* The EXT version of the DOT3 extension does not support the
	  * scale factor, but the ARB version (and the version in OpenGL
	  * 1.3) does.
	  */
	 RGBshift = 0;
	 /* FALLTHROUGH */

      case GL_DOT3_RGB:
      case GL_DOT3_RGBA:
	 /* The R100 / RV200 only support a 1X multiplier in hardware
	  * w/the ARB version.
	  */
	 if ( RGBshift != (RADEON_SCALE_1X >> RADEON_SCALE_SHIFT) ) {
	    return GL_FALSE;
	 }

	 RGBshift += 2;
	 if ( (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT)
	    || (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) ) {
            /* is it necessary to set this or will it be ignored anyway? */
	    Ashift = RGBshift;
	 }

	 color_combine = (RADEON_COLOR_ARG_C_ZERO |
			  RADEON_BLEND_CTL_DOT3 |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, B );
	 break;

      case GL_MODULATE_ADD_ATI:
	 color_combine = (RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, C );
	 RADEON_COLOR_ARG( 2, B );
	 break;
      case GL_MODULATE_SIGNED_ADD_ATI:
	 color_combine = (RADEON_BLEND_CTL_ADDSIGNED |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, C );
	 RADEON_COLOR_ARG( 2, B );
	 break;
      case GL_MODULATE_SUBTRACT_ATI:
	 color_combine = (RADEON_BLEND_CTL_SUBTRACT |
			  RADEON_CLAMP_TX);
	 RADEON_COLOR_ARG( 0, A );
	 RADEON_COLOR_ARG( 1, C );
	 RADEON_COLOR_ARG( 2, B );
	 break;
      default:
	 return GL_FALSE;
      }

      switch ( texUnit->_CurrentCombine->ModeA ) {
      case GL_REPLACE:
	 alpha_combine = (RADEON_ALPHA_ARG_A_ZERO |
			  RADEON_ALPHA_ARG_B_ZERO |
			  RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, C );
	 break;
      case GL_MODULATE:
	 alpha_combine = (RADEON_ALPHA_ARG_C_ZERO |
			  RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, B );
	 break;
      case GL_ADD:
	 alpha_combine = (RADEON_ALPHA_ARG_B_ZERO |
			  RADEON_COMP_ARG_B |
			  RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, C );
	 break;
      case GL_ADD_SIGNED:
	 alpha_combine = (RADEON_ALPHA_ARG_B_ZERO |
			  RADEON_COMP_ARG_B |
			  RADEON_BLEND_CTL_ADDSIGNED |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, C );
	 break;
      case GL_SUBTRACT:
	 alpha_combine = (RADEON_COLOR_ARG_B_ZERO |
			  RADEON_COMP_ARG_B |
			  RADEON_BLEND_CTL_SUBTRACT |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, C );
	 break;
      case GL_INTERPOLATE:
	 alpha_combine = (RADEON_BLEND_CTL_BLEND |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, B );
	 RADEON_ALPHA_ARG( 1, A );
	 RADEON_ALPHA_ARG( 2, C );
	 break;

      case GL_MODULATE_ADD_ATI:
	 alpha_combine = (RADEON_BLEND_CTL_ADD |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, C );
	 RADEON_ALPHA_ARG( 2, B );
	 break;
      case GL_MODULATE_SIGNED_ADD_ATI:
	 alpha_combine = (RADEON_BLEND_CTL_ADDSIGNED |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, C );
	 RADEON_ALPHA_ARG( 2, B );
	 break;
      case GL_MODULATE_SUBTRACT_ATI:
	 alpha_combine = (RADEON_BLEND_CTL_SUBTRACT |
			  RADEON_CLAMP_TX);
	 RADEON_ALPHA_ARG( 0, A );
	 RADEON_ALPHA_ARG( 1, C );
	 RADEON_ALPHA_ARG( 2, B );
	 break;
      default:
	 return GL_FALSE;
      }

      if ( (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGB_EXT)
	   || (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGB) ) {
	 alpha_combine |= RADEON_DOT_ALPHA_DONT_REPLICATE;
      }

      /* Step 3:
       * Apply the scale factor.
       */
      color_combine |= (RGBshift << RADEON_SCALE_SHIFT);
      alpha_combine |= (Ashift   << RADEON_SCALE_SHIFT);

      /* All done!
       */
   }

   if ( rmesa->hw.tex[unit].cmd[TEX_PP_TXCBLEND] != color_combine ||
	rmesa->hw.tex[unit].cmd[TEX_PP_TXABLEND] != alpha_combine ) {
      RADEON_STATECHANGE( rmesa, tex[unit] );
      rmesa->hw.tex[unit].cmd[TEX_PP_TXCBLEND] = color_combine;
      rmesa->hw.tex[unit].cmd[TEX_PP_TXABLEND] = alpha_combine;
   }

   return GL_TRUE;
}

void radeonSetTexOffset(__DRIcontext * pDRICtx, GLint texname,
                        unsigned long long offset, GLint depth, GLuint pitch)
{
	radeonContextPtr rmesa = pDRICtx->driverPrivate;
	struct gl_texture_object *tObj =
	    _mesa_lookup_texture(rmesa->glCtx, texname);
	radeonTexObjPtr t;

	if (tObj == NULL)
		return;

	t = (radeonTexObjPtr) tObj->DriverData;

	t->image_override = GL_TRUE;

	if (!offset)
		return;

	t->pp_txoffset = offset;
	t->pp_txpitch = pitch - 32;

	switch (depth) {
	case 32:
		t->pp_txformat = tx_table[MESA_FORMAT_ARGB8888].format;
		t->pp_txfilter |= tx_table[MESA_FORMAT_ARGB8888].filter;
		break;
	case 24:
	default:
		t->pp_txformat = tx_table[MESA_FORMAT_RGB888].format;
		t->pp_txfilter |= tx_table[MESA_FORMAT_RGB888].filter;
		break;
	case 16:
		t->pp_txformat = tx_table[MESA_FORMAT_RGB565].format;
		t->pp_txfilter |= tx_table[MESA_FORMAT_RGB565].filter;
		break;
	}
}

#define TEXOBJ_TXFILTER_MASK (RADEON_MAX_MIP_LEVEL_MASK |	\
			      RADEON_MIN_FILTER_MASK | 		\
			      RADEON_MAG_FILTER_MASK |		\
			      RADEON_MAX_ANISO_MASK |		\
			      RADEON_YUV_TO_RGB |		\
			      RADEON_YUV_TEMPERATURE_MASK |	\
			      RADEON_CLAMP_S_MASK | 		\
			      RADEON_CLAMP_T_MASK | 		\
			      RADEON_BORDER_MODE_D3D )

#define TEXOBJ_TXFORMAT_MASK (RADEON_TXFORMAT_WIDTH_MASK |	\
			      RADEON_TXFORMAT_HEIGHT_MASK |	\
			      RADEON_TXFORMAT_FORMAT_MASK |	\
                              RADEON_TXFORMAT_F5_WIDTH_MASK |	\
                              RADEON_TXFORMAT_F5_HEIGHT_MASK |	\
			      RADEON_TXFORMAT_ALPHA_IN_MAP |	\
			      RADEON_TXFORMAT_CUBIC_MAP_ENABLE |	\
                              RADEON_TXFORMAT_NON_POWER2)


static void import_tex_obj_state( radeonContextPtr rmesa,
				  int unit,
				  radeonTexObjPtr texobj )
{
/* do not use RADEON_DB_STATE to avoid stale texture caches */
   int *cmd = &rmesa->hw.tex[unit].cmd[TEX_CMD_0];
   GLuint se_coord_fmt = rmesa->hw.set.cmd[SET_SE_COORDFMT];

   RADEON_STATECHANGE( rmesa, tex[unit] );

   cmd[TEX_PP_TXFILTER] &= ~TEXOBJ_TXFILTER_MASK;
   cmd[TEX_PP_TXFILTER] |= texobj->pp_txfilter & TEXOBJ_TXFILTER_MASK;
   cmd[TEX_PP_TXFORMAT] &= ~TEXOBJ_TXFORMAT_MASK;
   cmd[TEX_PP_TXFORMAT] |= texobj->pp_txformat & TEXOBJ_TXFORMAT_MASK;
   cmd[TEX_PP_TXOFFSET] = texobj->pp_txoffset;
   cmd[TEX_PP_BORDER_COLOR] = texobj->pp_border_color;