radeon_texstate.c

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

   if (texobj->base.tObj->Target == GL_TEXTURE_RECTANGLE_NV) {
      GLuint *txr_cmd = RADEON_DB_STATE( txr[unit] );
      txr_cmd[TXR_PP_TEX_SIZE] = texobj->pp_txsize; /* NPOT only! */
      txr_cmd[TXR_PP_TEX_PITCH] = texobj->pp_txpitch; /* NPOT only! */
      RADEON_DB_STATECHANGE( rmesa, &rmesa->hw.txr[unit] );
      se_coord_fmt |= RADEON_VTX_ST0_NONPARAMETRIC << unit;
   }
   else {
      se_coord_fmt &= ~(RADEON_VTX_ST0_NONPARAMETRIC << unit);

      if (texobj->base.tObj->Target == GL_TEXTURE_CUBE_MAP) {
	 int *cube_cmd = &rmesa->hw.cube[unit].cmd[CUBE_CMD_0];
	 GLuint bytesPerFace = texobj->base.totalSize / 6;
	 ASSERT(texobj->base.totalSize % 6 == 0);

	 RADEON_STATECHANGE( rmesa, cube[unit] );
	 cube_cmd[CUBE_PP_CUBIC_FACES] = texobj->pp_cubic_faces;
	 /* dont know if this setup conforms to OpenGL.. 
	  * at least it matches the behavior of mesa software renderer
	  */
	 cube_cmd[CUBE_PP_CUBIC_OFFSET_0] = texobj->pp_txoffset; /* right */
	 cube_cmd[CUBE_PP_CUBIC_OFFSET_1] = texobj->pp_txoffset + 1 * bytesPerFace; /* left */
	 cube_cmd[CUBE_PP_CUBIC_OFFSET_2] = texobj->pp_txoffset + 2 * bytesPerFace; /* top */
	 cube_cmd[CUBE_PP_CUBIC_OFFSET_3] = texobj->pp_txoffset + 3 * bytesPerFace; /* bottom */
	 cube_cmd[CUBE_PP_CUBIC_OFFSET_4] = texobj->pp_txoffset + 4 * bytesPerFace; /* front */
	 cmd[TEX_PP_TXOFFSET] = texobj->pp_txoffset + 5 * bytesPerFace; /* back */
      }
   }

   if (se_coord_fmt != rmesa->hw.set.cmd[SET_SE_COORDFMT]) {
      RADEON_STATECHANGE( rmesa, set );
      rmesa->hw.set.cmd[SET_SE_COORDFMT] = se_coord_fmt;
   }

   texobj->dirty_state &= ~(1<<unit);
}




static void set_texgen_matrix( radeonContextPtr rmesa, 
			       GLuint unit,
			       const GLfloat *s_plane,
			       const GLfloat *t_plane,
			       const GLfloat *r_plane,
			       const GLfloat *q_plane )
{
   rmesa->TexGenMatrix[unit].m[0]  = s_plane[0];
   rmesa->TexGenMatrix[unit].m[4]  = s_plane[1];
   rmesa->TexGenMatrix[unit].m[8]  = s_plane[2];
   rmesa->TexGenMatrix[unit].m[12] = s_plane[3];

   rmesa->TexGenMatrix[unit].m[1]  = t_plane[0];
   rmesa->TexGenMatrix[unit].m[5]  = t_plane[1];
   rmesa->TexGenMatrix[unit].m[9]  = t_plane[2];
   rmesa->TexGenMatrix[unit].m[13] = t_plane[3];

   rmesa->TexGenMatrix[unit].m[2]  = r_plane[0];
   rmesa->TexGenMatrix[unit].m[6]  = r_plane[1];
   rmesa->TexGenMatrix[unit].m[10] = r_plane[2];
   rmesa->TexGenMatrix[unit].m[14] = r_plane[3];

   rmesa->TexGenMatrix[unit].m[3]  = q_plane[0];
   rmesa->TexGenMatrix[unit].m[7]  = q_plane[1];
   rmesa->TexGenMatrix[unit].m[11] = q_plane[2];
   rmesa->TexGenMatrix[unit].m[15] = q_plane[3];

   rmesa->TexGenEnabled |= RADEON_TEXMAT_0_ENABLE << unit;
   rmesa->NewGLState |= _NEW_TEXTURE_MATRIX;
}

/* Returns GL_FALSE if fallback required.
 */
static GLboolean radeon_validate_texgen( GLcontext *ctx, GLuint unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   GLuint inputshift = RADEON_TEXGEN_0_INPUT_SHIFT + unit*4;
   GLuint tmp = rmesa->TexGenEnabled;
   static const GLfloat reflect[16] = {
      -1,  0,  0,  0,
       0, -1,  0,  0,
       0,  0,  -1, 0,
       0,  0,  0,  1 };

   rmesa->TexGenEnabled &= ~(RADEON_TEXGEN_TEXMAT_0_ENABLE << unit);
   rmesa->TexGenEnabled &= ~(RADEON_TEXMAT_0_ENABLE << unit);
   rmesa->TexGenEnabled &= ~(RADEON_TEXGEN_INPUT_MASK << inputshift);
   rmesa->TexGenNeedNormals[unit] = 0;

   if ((texUnit->TexGenEnabled & (S_BIT|T_BIT|R_BIT|Q_BIT)) == 0) {
      /* Disabled, no fallback:
       */
      rmesa->TexGenEnabled |=
	 (RADEON_TEXGEN_INPUT_TEXCOORD_0 + unit) << inputshift;
      return GL_TRUE;
   }
   /* the r100 cannot do texgen for some coords and not for others
    * we do not detect such cases (certainly can't do it here) and just
    * ASSUME that when S and T are texgen enabled we do not need other
    * non-texgen enabled coords, no matter if the R and Q bits are texgen
    * enabled. Still check for mixed mode texgen for all coords.
    */
   else if ( (texUnit->TexGenEnabled & S_BIT) &&
	     (texUnit->TexGenEnabled & T_BIT) &&
	     (texUnit->GenModeS == texUnit->GenModeT) ) {
      if ( ((texUnit->TexGenEnabled & R_BIT) &&
	    (texUnit->GenModeS != texUnit->GenModeR)) ||
	   ((texUnit->TexGenEnabled & Q_BIT) &&
	    (texUnit->GenModeS != texUnit->GenModeQ)) ) {
	 /* Mixed modes, fallback:
	  */
	 if (RADEON_DEBUG & DEBUG_FALLBACKS)
	    fprintf(stderr, "fallback mixed texgen\n");
	 return GL_FALSE;
      }
      rmesa->TexGenEnabled |= RADEON_TEXGEN_TEXMAT_0_ENABLE << unit;
   }
   else {
   /* some texgen mode not including both S and T bits */
      if (RADEON_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "fallback mixed texgen/nontexgen\n");
      return GL_FALSE;
   }

   if ((texUnit->TexGenEnabled & (R_BIT | Q_BIT)) != 0) {
      /* need this here for vtxfmt presumably. Argh we need to set
         this from way too many places, would be much easier if we could leave
         tcl q coord always enabled as on r200) */
      RADEON_STATECHANGE( rmesa, tcl );
      rmesa->hw.tcl.cmd[TCL_OUTPUT_VTXFMT] |= RADEON_Q_BIT(unit);
   }

   switch (texUnit->GenModeS) {
   case GL_OBJECT_LINEAR:
      rmesa->TexGenEnabled |= RADEON_TEXGEN_INPUT_OBJ << inputshift;
      set_texgen_matrix( rmesa, unit,
			 texUnit->ObjectPlaneS,
			 texUnit->ObjectPlaneT,
			 texUnit->ObjectPlaneR,
			 texUnit->ObjectPlaneQ);
      break;

   case GL_EYE_LINEAR:
      rmesa->TexGenEnabled |= RADEON_TEXGEN_INPUT_EYE << inputshift;
      set_texgen_matrix( rmesa, unit,
			 texUnit->EyePlaneS,
			 texUnit->EyePlaneT,
			 texUnit->EyePlaneR,
			 texUnit->EyePlaneQ);
      break;

   case GL_REFLECTION_MAP_NV:
      rmesa->TexGenNeedNormals[unit] = GL_TRUE;
      rmesa->TexGenEnabled |= RADEON_TEXGEN_INPUT_EYE_REFLECT << inputshift;
      /* TODO: unknown if this is needed/correct */
      set_texgen_matrix( rmesa, unit, reflect, reflect + 4,
			reflect + 8, reflect + 12 );
      break;

   case GL_NORMAL_MAP_NV:
      rmesa->TexGenNeedNormals[unit] = GL_TRUE;
      rmesa->TexGenEnabled |= RADEON_TEXGEN_INPUT_EYE_NORMAL << inputshift;
      break;

   case GL_SPHERE_MAP:
      /* the mode which everyone uses :-( */
   default:
      /* Unsupported mode, fallback:
       */
      if (RADEON_DEBUG & DEBUG_FALLBACKS) 
	 fprintf(stderr, "fallback GL_SPHERE_MAP\n");
      return GL_FALSE;
   }

   if (tmp != rmesa->TexGenEnabled) {
      rmesa->NewGLState |= _NEW_TEXTURE_MATRIX;
   }

   return GL_TRUE;
}


static void disable_tex( GLcontext *ctx, int unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);

   if (rmesa->hw.ctx.cmd[CTX_PP_CNTL] & (RADEON_TEX_0_ENABLE<<unit)) {
      /* Texture unit disabled */
      if ( rmesa->state.texture.unit[unit].texobj != NULL ) {
	 /* The old texture is no longer bound to this texture unit.
	  * Mark it as such.
	  */

	 rmesa->state.texture.unit[unit].texobj->base.bound &= ~(1UL << unit);
	 rmesa->state.texture.unit[unit].texobj = NULL;
      }

      RADEON_STATECHANGE( rmesa, ctx );
      rmesa->hw.ctx.cmd[CTX_PP_CNTL] &= 
	  ~((RADEON_TEX_0_ENABLE | RADEON_TEX_BLEND_0_ENABLE) << unit);

      RADEON_STATECHANGE( rmesa, tcl );
      rmesa->hw.tcl.cmd[TCL_OUTPUT_VTXFMT] &= ~(RADEON_ST_BIT(unit) |
						RADEON_Q_BIT(unit));

      if (rmesa->TclFallback & (RADEON_TCL_FALLBACK_TEXGEN_0<<unit)) {
	 TCL_FALLBACK( ctx, (RADEON_TCL_FALLBACK_TEXGEN_0<<unit), GL_FALSE);
	 rmesa->recheck_texgen[unit] = GL_TRUE;
      }

      if (rmesa->hw.tex[unit].cmd[TEX_PP_TXFORMAT] & RADEON_TXFORMAT_CUBIC_MAP_ENABLE) {
      /* this seems to be a genuine (r100 only?) hw bug. Need to remove the
         cubic_map bit on unit 2 when the unit is disabled, otherwise every
	 2nd (2d) mipmap on unit 0 will be broken (may not be needed for other
	 units, better be safe than sorry though).*/
	 RADEON_STATECHANGE( rmesa, tex[unit] );
	 rmesa->hw.tex[unit].cmd[TEX_PP_TXFORMAT] &= ~RADEON_TXFORMAT_CUBIC_MAP_ENABLE;
      }

      {
	 GLuint inputshift = RADEON_TEXGEN_0_INPUT_SHIFT + unit*4;
	 GLuint tmp = rmesa->TexGenEnabled;

	 rmesa->TexGenEnabled &= ~(RADEON_TEXGEN_TEXMAT_0_ENABLE<<unit);
	 rmesa->TexGenEnabled &= ~(RADEON_TEXMAT_0_ENABLE<<unit);
	 rmesa->TexGenEnabled &= ~(RADEON_TEXGEN_INPUT_MASK<<inputshift);
	 rmesa->TexGenNeedNormals[unit] = 0;
	 rmesa->TexGenEnabled |= 
	     (RADEON_TEXGEN_INPUT_TEXCOORD_0+unit) << inputshift;

	 if (tmp != rmesa->TexGenEnabled) {
	    rmesa->recheck_texgen[unit] = GL_TRUE;
	    rmesa->NewGLState |= _NEW_TEXTURE_MATRIX;
	 }
      }
   }
}

static GLboolean enable_tex_2d( GLcontext *ctx, int unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   struct gl_texture_object *tObj = texUnit->_Current;
   radeonTexObjPtr t = (radeonTexObjPtr) tObj->DriverData;

   /* Need to load the 2d images associated with this unit.
    */
   if (t->pp_txformat & RADEON_TXFORMAT_NON_POWER2) {
      t->pp_txformat &= ~RADEON_TXFORMAT_NON_POWER2;
      t->base.dirty_images[0] = ~0;
   }

   ASSERT(tObj->Target == GL_TEXTURE_2D || tObj->Target == GL_TEXTURE_1D);

   if ( t->base.dirty_images[0] ) {
      RADEON_FIREVERTICES( rmesa );
      radeonSetTexImages( rmesa, tObj );
      radeonUploadTexImages( rmesa, (radeonTexObjPtr) tObj->DriverData, 0 );
      if ( !t->base.memBlock && !t->image_override ) 
	return GL_FALSE;
   }

   return GL_TRUE;
}

static GLboolean enable_tex_cube( GLcontext *ctx, int unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   struct gl_texture_object *tObj = texUnit->_Current;
   radeonTexObjPtr t = (radeonTexObjPtr) tObj->DriverData;
   GLuint face;

   /* Need to load the 2d images associated with this unit.
    */
   if (t->pp_txformat & RADEON_TXFORMAT_NON_POWER2) {
      t->pp_txformat &= ~RADEON_TXFORMAT_NON_POWER2;
      for (face = 0; face < 6; face++)
         t->base.dirty_images[face] = ~0;
   }

   ASSERT(tObj->Target == GL_TEXTURE_CUBE_MAP);

   if ( t->base.dirty_images[0] || t->base.dirty_images[1] ||
        t->base.dirty_images[2] || t->base.dirty_images[3] ||
        t->base.dirty_images[4] || t->base.dirty_images[5] ) {
      /* flush */
      RADEON_FIREVERTICES( rmesa );
      /* layout memory space, once for all faces */
      radeonSetTexImages( rmesa, tObj );
   }

   /* upload (per face) */
   for (face = 0; face < 6; face++) {
      if (t->base.dirty_images[face]) {
         radeonUploadTexImages( rmesa, (radeonTexObjPtr) tObj->DriverData, face );
      }
   }
      
   if ( !t->base.memBlock ) {
      /* texmem alloc failed, use s/w fallback */
      return GL_FALSE;
   }

   return GL_TRUE;
}

static GLboolean enable_tex_rect( GLcontext *ctx, int unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   struct gl_texture_object *tObj = texUnit->_Current;
   radeonTexObjPtr t = (radeonTexObjPtr) tObj->DriverData;

   if (!(t->pp_txformat & RADEON_TXFORMAT_NON_POWER2)) {
      t->pp_txformat |= RADEON_TXFORMAT_NON_POWER2;
      t->base.dirty_images[0] = ~0;
   }

   ASSERT(tObj->Target == GL_TEXTURE_RECTANGLE_NV);

   if ( t->base.dirty_images[0] ) {
      RADEON_FIREVERTICES( rmesa );
      radeonSetTexImages( rmesa, tObj );
      radeonUploadTexImages( rmesa, (radeonTexObjPtr) tObj->DriverData, 0 );
      if ( !t->base.memBlock &&
           !t->image_override /* && !rmesa->prefer_gart_client_texturing  FIXME */ ) {
	 fprintf(stderr, "%s: upload failed\n", __FUNCTION__);
	 return GL_FALSE;
      }
   }

   return GL_TRUE;
}


static GLboolean update_tex_common( GLcontext *ctx, int unit )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
   struct gl_texture_object *tObj = texUnit->_Current;
   radeonTexObjPtr t = (radeonTexObjPtr) tObj->DriverData;
   GLenum format;

   /* Fallback if there's a texture border */
   if ( tObj->Image[0][tObj->BaseLevel]->Border > 0 ) {
      fprintf(stderr, "%s: border\n", __FUNCTION__);
      return GL_FALSE;
   }
   /* yuv conversion only works in first unit */
   if (unit != 0 && (t->pp_txfilter & RADEON_YUV_TO_RGB))
      return GL_FALSE;

   /* Update state if this is a different texture object to last
    * time.
    */
   if ( rmesa->state.texture.unit[unit].texobj != t ) {
      if ( rmesa->state.texture.unit[unit].texobj != NULL ) {
	 /* The old texture is no longer bound to this texture unit.
	  * Mark it as such.
	  */

	 rmesa->state.texture.unit[unit].texobj->base.bound &= 
	     ~(1UL << unit);
      }

      rmesa->state.texture.unit[unit].texobj = t;
      t->base.bound |= (1UL << unit);
      t->dirty_state |= 1<<unit;
      driUpdateTextureLRU( (driTextureObject *) t ); /* XXX: should be locked! */
   }


   /* Newly enabled?
    */
   if ( !(rmesa->hw.ctx.cmd[CTX_PP_CNTL] & (RADEON_TEX_0_ENABLE<<unit))) {
      RADEON_STATECHANGE( rmesa, ctx );
      rmesa->hw.ctx.cmd[CTX_PP_CNTL] |= 
	  (RADEON_TEX_0_ENABLE | RADEON_TEX_BLEND_0_ENABLE) << unit;

      RADEON_STATECHANGE( rmesa, tcl );

      rmesa->hw.tcl.cmd[TCL_OUTPUT_VTXFMT] |= RADEON_ST_BIT(unit);

      rmesa->recheck_texgen[unit] = GL_TRUE;
   }

   if (t->dirty_state & (1<<unit)) {
      import_tex_obj_state( rmesa, unit, t );
      /* may need to update texture matrix (for texrect adjustments) */
      rmesa->NewGLState |= _NEW_TEXTURE_MATRIX;
   }

   if (rmesa->recheck_texgen[unit]) {
      GLboolean fallback = !radeon_validate_texgen( ctx, unit );
      TCL_FALLBACK( ctx, (RADEON_TCL_FALLBACK_TEXGEN_0<<unit), fallback);
      rmesa->recheck_texgen[unit] = 0;
      rmesa->NewGLState |= _NEW_TEXTURE_MATRIX;
   }

   format = tObj->Image[0][tObj->BaseLevel]->_BaseFormat;
   if ( rmesa->state.texture.unit[unit].format != format ||
	rmesa->state.texture.unit[unit].envMode != texUnit->EnvMode ) {
      rmesa->state.texture.unit[unit].format = format;
      rmesa->state.texture.unit[unit].envMode = texUnit->EnvMode;
      if ( ! radeonUpdateTextureEnv( ctx, unit ) ) {
	 return GL_FALSE;
      }
   }

   FALLBACK( rmesa, RADEON_FALLBACK_BORDER_MODE, t->border_fallback );
   return !t->border_fallback;
}



static GLboolean radeonUpdateTextureUnit( GLcontext *ctx, int unit )
{
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];

   if ( texUnit->_ReallyEnabled & (TEXTURE_RECT_BIT) ) {
      return (enable_tex_rect( ctx, unit ) &&
	      update_tex_common( ctx, unit ));
   }
   else if ( texUnit->_ReallyEnabled & (TEXTURE_1D_BIT | TEXTURE_2D_BIT) ) {
      return (enable_tex_2d( ctx, unit ) &&
	      update_tex_common( ctx, unit ));
   }
   else if ( texUnit->_ReallyEnabled & (TEXTURE_CUBE_BIT) ) {
      return (enable_tex_cube( ctx, unit ) &&
	      update_tex_common( ctx, unit ));
   }
   else if ( texUnit->_ReallyEnabled ) {
      return GL_FALSE;
   }
   else {
      disable_tex( ctx, unit );
      return GL_TRUE;
   }
}

void radeonUpdateTextureState( GLcontext *ctx )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   GLboolean ok;

   ok = (radeonUpdateTextureUnit( ctx, 0 ) &&
	 radeonUpdateTextureUnit( ctx, 1 ) &&
	 radeonUpdateTextureUnit( ctx, 2 ));

   FALLBACK( rmesa, RADEON_FALLBACK_TEXTURE, !ok );

   if (rmesa->TclFallback)
      radeonChooseVertexState( ctx );
}