r200_tex.c

mesa-6.5-minigui源码

static void r200CompressedTexSubImage2D( GLcontext *ctx, GLenum target, GLint level,
                                 GLint xoffset, GLint yoffset,
                                 GLsizei width, GLsizei height,
                                 GLenum format,
                                 GLsizei imageSize, const GLvoid *data,
                                 struct gl_texture_object *texObj,
                                 struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;
   GLuint face;


   /* which cube face or ordinary 2D image */
   switch (target) {
   case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
      face = (GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X;
      ASSERT(face < 6);
      break;
   default:
      face = 0;
   }

   assert( t ); /* this _should_ be true */
   if ( t ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) r200AllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexSubImage2D");
         return;
      }
   }

   _mesa_store_compressed_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
                            height, format, imageSize, data, texObj, texImage);

   t->dirty_images[face] |= (1 << level);
}


#if ENABLE_HW_3D_TEXTURE
static void r200TexImage3D( GLcontext *ctx, GLenum target, GLint level,
                            GLint internalFormat,
                            GLint width, GLint height, GLint depth,
                            GLint border,
                            GLenum format, GLenum type, const GLvoid *pixels,
                            const struct gl_pixelstore_attrib *packing,
                            struct gl_texture_object *texObj,
                            struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;

   if ( t ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) r200AllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage3D");
         return;
      }
   }

   texImage->IsClientData = GL_FALSE;

#if 0
   if (r200ValidateClientStorage( ctx, target, 
				  internalFormat, 
				  width, height, 
				  format, type, pixels, 
				  packing, texObj, texImage)) {
      if (R200_DEBUG & DEBUG_TEXTURE)
	 fprintf(stderr, "%s: Using client storage\n", __FUNCTION__); 
   }
   else
#endif
   {
      if (R200_DEBUG & DEBUG_TEXTURE)
	 fprintf(stderr, "%s: Using normal storage\n", __FUNCTION__); 

      /* Normal path: copy (to cached memory) and eventually upload
       * via another copy to GART memory and then a blit...  Could
       * eliminate one copy by going straight to (permanent) GART.
       *
       * Note, this will call r200ChooseTextureFormat.
       */
      _mesa_store_teximage3d(ctx, target, level, internalFormat,
			     width, height, depth, border,
                             format, type, pixels,
			     &ctx->Unpack, texObj, texImage);
      
      t->dirty_images[0] |= (1 << level);
   }
}
#endif


#if ENABLE_HW_3D_TEXTURE
static void
r200TexSubImage3D( GLcontext *ctx, GLenum target, GLint level,
                   GLint xoffset, GLint yoffset, GLint zoffset,
                   GLsizei width, GLsizei height, GLsizei depth,
                   GLenum format, GLenum type,
                   const GLvoid *pixels,
                   const struct gl_pixelstore_attrib *packing,
                   struct gl_texture_object *texObj,
                   struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;

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

   assert( t ); /* this _should_ be true */
   if ( t ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) r200AllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage3D");
         return;
      }
      texObj->DriverData = t;
   }

   _mesa_store_texsubimage3d(ctx, target, level, xoffset, yoffset, zoffset,
                             width, height, depth,
                             format, type, pixels, packing, texObj, texImage);

   t->dirty_images[0] |= (1 << level);
}
#endif



static void r200TexEnv( GLcontext *ctx, GLenum target,
			  GLenum pname, const GLfloat *param )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   GLuint unit = ctx->Texture.CurrentUnit;
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];

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

   /* This is incorrect: Need to maintain this data for each of
    * GL_TEXTURE_{123}D, GL_TEXTURE_RECTANGLE_NV, etc, and switch
    * between them according to _ReallyEnabled.
    */
   switch ( pname ) {
   case GL_TEXTURE_ENV_COLOR: {
      GLubyte c[4];
      GLuint envColor;
      UNCLAMPED_FLOAT_TO_RGBA_CHAN( c, texUnit->EnvColor );
      envColor = r200PackColor( 4, c[0], c[1], c[2], c[3] );
      if ( rmesa->hw.tf.cmd[TF_TFACTOR_0 + unit] != envColor ) {
	 R200_STATECHANGE( rmesa, tf );
	 rmesa->hw.tf.cmd[TF_TFACTOR_0 + unit] = envColor;
      }
      break;
   }

   case GL_TEXTURE_LOD_BIAS_EXT: {
      GLfloat bias, min;
      GLuint b;
      const int fixed_one = 0x8000000;

      /* The R200's LOD bias is a signed 2's complement value with a
       * range of -16.0 <= bias < 16.0. 
       *
       * NOTE: Add a small bias to the bias for conform mipsel.c test.
       */
      bias = *param + .01;
      min = driQueryOptionb (&rmesa->optionCache, "no_neg_lod_bias") ?
	  0.0 : -16.0;
      bias = CLAMP( bias, min, 16.0 );
      b = (int)(bias * fixed_one) & R200_LOD_BIAS_MASK;
      
      if ( (rmesa->hw.tex[unit].cmd[TEX_PP_TXFORMAT_X] & R200_LOD_BIAS_MASK) != b ) {
	 R200_STATECHANGE( rmesa, tex[unit] );
	 rmesa->hw.tex[unit].cmd[TEX_PP_TXFORMAT_X] &= ~R200_LOD_BIAS_MASK;
	 rmesa->hw.tex[unit].cmd[TEX_PP_TXFORMAT_X] |= b;
      }
      break;
   }

   default:
      return;
   }
}


/**
 * Changes variables and flags for a state update, which will happen at the
 * next UpdateTextureState
 */

static void r200TexParameter( GLcontext *ctx, GLenum target,
				struct gl_texture_object *texObj,
				GLenum pname, const GLfloat *params )
{
   r200TexObjPtr t = (r200TexObjPtr) texObj->DriverData;

   if ( R200_DEBUG & (DEBUG_STATE|DEBUG_TEXTURE) ) {
      fprintf( stderr, "%s( %s )\n", __FUNCTION__,
	       _mesa_lookup_enum_by_nr( pname ) );
   }

   switch ( pname ) {
   case GL_TEXTURE_MIN_FILTER:
   case GL_TEXTURE_MAG_FILTER:
   case GL_TEXTURE_MAX_ANISOTROPY_EXT:
      r200SetTexMaxAnisotropy( t, texObj->MaxAnisotropy );
      r200SetTexFilter( t, texObj->MinFilter, texObj->MagFilter );
      break;

   case GL_TEXTURE_WRAP_S:
   case GL_TEXTURE_WRAP_T:
   case GL_TEXTURE_WRAP_R:
      r200SetTexWrap( t, texObj->WrapS, texObj->WrapT, texObj->WrapR );
      break;

   case GL_TEXTURE_BORDER_COLOR:
      r200SetTexBorderColor( t, texObj->_BorderChan );
      break;

   case GL_TEXTURE_BASE_LEVEL:
   case GL_TEXTURE_MAX_LEVEL:
   case GL_TEXTURE_MIN_LOD:
   case GL_TEXTURE_MAX_LOD:
      /* This isn't the most efficient solution but there doesn't appear to
       * be a nice alternative.  Since there's no LOD clamping,
       * we just have to rely on loading the right subset of mipmap levels
       * to simulate a clamped LOD.
       */
      driSwapOutTextureObject( (driTextureObject *) t );
      break;

   default:
      return;
   }

   /* Mark this texobj as dirty (one bit per tex unit)
    */
   t->dirty_state = TEX_ALL;
}



static void r200BindTexture( GLcontext *ctx, GLenum target,
			       struct gl_texture_object *texObj )
{
   if ( R200_DEBUG & (DEBUG_STATE|DEBUG_TEXTURE) ) {
      fprintf( stderr, "%s( %p ) unit=%d\n", __FUNCTION__, (void *)texObj,
	       ctx->Texture.CurrentUnit );
   }

   if ( (target == GL_TEXTURE_1D)
	|| (target == GL_TEXTURE_2D) 
#if ENABLE_HW_3D_TEXTURE
	|| (target == GL_TEXTURE_3D)
#endif
	|| (target == GL_TEXTURE_CUBE_MAP)
	|| (target == GL_TEXTURE_RECTANGLE_NV) ) {
      assert( texObj->DriverData != NULL );
   }
}


static void r200DeleteTexture( GLcontext *ctx,
				 struct gl_texture_object *texObj )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   driTextureObject * t = (driTextureObject *) texObj->DriverData;

   if ( R200_DEBUG & (DEBUG_STATE|DEBUG_TEXTURE) ) {
      fprintf( stderr, "%s( %p (target = %s) )\n", __FUNCTION__, (void *)texObj,
	       _mesa_lookup_enum_by_nr( texObj->Target ) );
   }

   if ( t != NULL ) {
      if ( rmesa ) {
         R200_FIREVERTICES( rmesa );
      }

      driDestroyTextureObject( t );
   }
   /* Free mipmap images and the texture object itself */
   _mesa_delete_texture_object(ctx, texObj);
}

/* Need:  
 *  - Same GEN_MODE for all active bits
 *  - Same EyePlane/ObjPlane for all active bits when using Eye/Obj
 *  - STRQ presumably all supported (matrix means incoming R values
 *    can end up in STQ, this has implications for vertex support,
 *    presumably ok if maos is used, though?)
 *  
 * Basically impossible to do this on the fly - just collect some
 * basic info & do the checks from ValidateState().
 */
static void r200TexGen( GLcontext *ctx,
			  GLenum coord,
			  GLenum pname,
			  const GLfloat *params )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   GLuint unit = ctx->Texture.CurrentUnit;
   rmesa->recheck_texgen[unit] = GL_TRUE;
}


/**
 * Allocate a new texture object.
 * Called via ctx->Driver.NewTextureObject.
 * Note: this function will be called during context creation to
 * allocate the default texture objects.
 * Note: we could use containment here to 'derive' the driver-specific
 * texture object from the core mesa gl_texture_object.  Not done at this time.
 * Fixup MaxAnisotropy according to user preference.
 */
static struct gl_texture_object *
r200NewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
{
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   struct gl_texture_object *obj;
   obj = _mesa_new_texture_object(ctx, name, target);
   if (!obj)
      return NULL;
   obj->MaxAnisotropy = rmesa->initialMaxAnisotropy;
   r200AllocTexObj( obj );
   return obj;
}


void r200InitTextureFuncs( struct dd_function_table *functions )
{
   /* Note: we only plug in the functions we implement in the driver
    * since _mesa_init_driver_functions() was already called.
    */
   functions->ChooseTextureFormat	= r200ChooseTextureFormat;
   functions->TexImage1D		= r200TexImage1D;
   functions->TexImage2D		= r200TexImage2D;
#if ENABLE_HW_3D_TEXTURE
   functions->TexImage3D		= r200TexImage3D;
#else
   functions->TexImage3D		= _mesa_store_teximage3d;
#endif
   functions->TexSubImage1D		= r200TexSubImage1D;
   functions->TexSubImage2D		= r200TexSubImage2D;
#if ENABLE_HW_3D_TEXTURE
   functions->TexSubImage3D		= r200TexSubImage3D;
#else
   functions->TexSubImage3D		= _mesa_store_texsubimage3d;
#endif
   functions->NewTextureObject		= r200NewTextureObject;
   functions->BindTexture		= r200BindTexture;
   functions->DeleteTexture		= r200DeleteTexture;
   functions->IsTextureResident		= driIsTextureResident;

   functions->TexEnv			= r200TexEnv;
   functions->TexParameter		= r200TexParameter;
   functions->TexGen			= r200TexGen;

   functions->CompressedTexImage2D	= r200CompressedTexImage2D;
   functions->CompressedTexSubImage2D	= r200CompressedTexSubImage2D;

   driInitTextureFormats();

#if 000
   /* moved or obsolete code */
   r200ContextPtr rmesa = R200_CONTEXT(ctx);
   driInitTextureObjects( ctx, & rmesa->swapped,
			  DRI_TEXMGR_DO_TEXTURE_1D
			  | DRI_TEXMGR_DO_TEXTURE_2D );

   /* Hack: r200NewTextureObject is not yet installed when the
    * default textures are created. Therefore set MaxAnisotropy of the
    * default 2D texture now. */
   ctx->Shared->Default2D->MaxAnisotropy = driQueryOptionf (&rmesa->optionCache,
							    "def_max_anisotropy");
#endif
}