vbo_save_api.c

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

static void GLAPIENTRY _save_Rectf( GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2 )
{
   GET_CURRENT_CONTEXT(ctx);
   (void) x1; (void) y1; (void) x2; (void) y2;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glRectf" );
}

static void GLAPIENTRY _save_EvalMesh1( GLenum mode, GLint i1, GLint i2 )
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) i1; (void) i2;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glEvalMesh1" );
}

static void GLAPIENTRY _save_EvalMesh2( GLenum mode, GLint i1, GLint i2,
				  GLint j1, GLint j2 )
{
   GET_CURRENT_CONTEXT(ctx);
   (void) mode; (void) i1; (void) i2; (void) j1; (void) j2;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "glEvalMesh2" );
}

static void GLAPIENTRY _save_Begin( GLenum mode )
{
   GET_CURRENT_CONTEXT( ctx );
   (void) mode;
   _mesa_compile_error( ctx, GL_INVALID_OPERATION, "Recursive glBegin" );
}


/* Unlike the functions above, these are to be hooked into the vtxfmt
 * maintained in ctx->ListState, active when the list is known or
 * suspected to be outside any begin/end primitive.
 */
static void GLAPIENTRY _save_OBE_Rectf( GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2 )
{
   GET_CURRENT_CONTEXT(ctx);
   vbo_save_NotifyBegin( ctx, GL_QUADS | VBO_SAVE_PRIM_WEAK );
   CALL_Vertex2f(GET_DISPATCH(), ( x1, y1 ));
   CALL_Vertex2f(GET_DISPATCH(), ( x2, y1 ));
   CALL_Vertex2f(GET_DISPATCH(), ( x2, y2 ));
   CALL_Vertex2f(GET_DISPATCH(), ( x1, y2 ));
   CALL_End(GET_DISPATCH(), ());
}


static void GLAPIENTRY _save_OBE_DrawArrays(GLenum mode, GLint start, GLsizei count)
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
      return;

   _ae_map_vbos( ctx );

   vbo_save_NotifyBegin( ctx, mode | VBO_SAVE_PRIM_WEAK );

   for (i = 0; i < count; i++)
       CALL_ArrayElement(GET_DISPATCH(), (start + i));
   CALL_End(GET_DISPATCH(), ());

   _ae_unmap_vbos( ctx );
}

/* Could do better by copying the arrays and element list intact and
 * then emitting an indexed prim at runtime.
 */
static void GLAPIENTRY _save_OBE_DrawElements(GLenum mode, GLsizei count, GLenum type,
				   const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
      return;

   _ae_map_vbos( ctx );

   if (ctx->Array.ElementArrayBufferObj->Name)
      indices = ADD_POINTERS(ctx->Array.ElementArrayBufferObj->Pointer, indices);

   vbo_save_NotifyBegin( ctx, mode | VBO_SAVE_PRIM_WEAK );

   switch (type) {
   case GL_UNSIGNED_BYTE:
      for (i = 0 ; i < count ; i++)
	  CALL_ArrayElement(GET_DISPATCH(), ( ((GLubyte *)indices)[i] ));
      break;
   case GL_UNSIGNED_SHORT:
      for (i = 0 ; i < count ; i++)
	  CALL_ArrayElement(GET_DISPATCH(), ( ((GLushort *)indices)[i] ));
      break;
   case GL_UNSIGNED_INT:
      for (i = 0 ; i < count ; i++)
	  CALL_ArrayElement(GET_DISPATCH(), ( ((GLuint *)indices)[i] ));
      break;
   default:
      _mesa_error( ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
      break;
   }

   CALL_End(GET_DISPATCH(), ());

   _ae_unmap_vbos( ctx );
}

static void GLAPIENTRY _save_OBE_DrawRangeElements(GLenum mode,
					GLuint start, GLuint end,
					GLsizei count, GLenum type,
					const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);
   if (_mesa_validate_DrawRangeElements( ctx, mode,
					 start, end,
					 count, type, indices ))
      _save_OBE_DrawElements( mode, count, type, indices );
}





static void _save_vtxfmt_init( GLcontext *ctx )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLvertexformat *vfmt = &save->vtxfmt;

   vfmt->ArrayElement = _ae_loopback_array_elt;	        /* generic helper */
   vfmt->Begin = _save_Begin;
   vfmt->Color3f = _save_Color3f;
   vfmt->Color3fv = _save_Color3fv;
   vfmt->Color4f = _save_Color4f;
   vfmt->Color4fv = _save_Color4fv;
   vfmt->EdgeFlag = _save_EdgeFlag;
   vfmt->End = _save_End;
   vfmt->FogCoordfEXT = _save_FogCoordfEXT;
   vfmt->FogCoordfvEXT = _save_FogCoordfvEXT;
   vfmt->Indexf = _save_Indexf;
   vfmt->Indexfv = _save_Indexfv;
   vfmt->Materialfv = _save_Materialfv;
   vfmt->MultiTexCoord1fARB = _save_MultiTexCoord1f;
   vfmt->MultiTexCoord1fvARB = _save_MultiTexCoord1fv;
   vfmt->MultiTexCoord2fARB = _save_MultiTexCoord2f;
   vfmt->MultiTexCoord2fvARB = _save_MultiTexCoord2fv;
   vfmt->MultiTexCoord3fARB = _save_MultiTexCoord3f;
   vfmt->MultiTexCoord3fvARB = _save_MultiTexCoord3fv;
   vfmt->MultiTexCoord4fARB = _save_MultiTexCoord4f;
   vfmt->MultiTexCoord4fvARB = _save_MultiTexCoord4fv;
   vfmt->Normal3f = _save_Normal3f;
   vfmt->Normal3fv = _save_Normal3fv;
   vfmt->SecondaryColor3fEXT = _save_SecondaryColor3fEXT;
   vfmt->SecondaryColor3fvEXT = _save_SecondaryColor3fvEXT;
   vfmt->TexCoord1f = _save_TexCoord1f;
   vfmt->TexCoord1fv = _save_TexCoord1fv;
   vfmt->TexCoord2f = _save_TexCoord2f;
   vfmt->TexCoord2fv = _save_TexCoord2fv;
   vfmt->TexCoord3f = _save_TexCoord3f;
   vfmt->TexCoord3fv = _save_TexCoord3fv;
   vfmt->TexCoord4f = _save_TexCoord4f;
   vfmt->TexCoord4fv = _save_TexCoord4fv;
   vfmt->Vertex2f = _save_Vertex2f;
   vfmt->Vertex2fv = _save_Vertex2fv;
   vfmt->Vertex3f = _save_Vertex3f;
   vfmt->Vertex3fv = _save_Vertex3fv;
   vfmt->Vertex4f = _save_Vertex4f;
   vfmt->Vertex4fv = _save_Vertex4fv;
   vfmt->VertexAttrib1fARB = _save_VertexAttrib1fARB;
   vfmt->VertexAttrib1fvARB = _save_VertexAttrib1fvARB;
   vfmt->VertexAttrib2fARB = _save_VertexAttrib2fARB;
   vfmt->VertexAttrib2fvARB = _save_VertexAttrib2fvARB;
   vfmt->VertexAttrib3fARB = _save_VertexAttrib3fARB;
   vfmt->VertexAttrib3fvARB = _save_VertexAttrib3fvARB;
   vfmt->VertexAttrib4fARB = _save_VertexAttrib4fARB;
   vfmt->VertexAttrib4fvARB = _save_VertexAttrib4fvARB;

   vfmt->VertexAttrib1fNV = _save_VertexAttrib1fNV;
   vfmt->VertexAttrib1fvNV = _save_VertexAttrib1fvNV;
   vfmt->VertexAttrib2fNV = _save_VertexAttrib2fNV;
   vfmt->VertexAttrib2fvNV = _save_VertexAttrib2fvNV;
   vfmt->VertexAttrib3fNV = _save_VertexAttrib3fNV;
   vfmt->VertexAttrib3fvNV = _save_VertexAttrib3fvNV;
   vfmt->VertexAttrib4fNV = _save_VertexAttrib4fNV;
   vfmt->VertexAttrib4fvNV = _save_VertexAttrib4fvNV;
   
   /* This will all require us to fallback to saving the list as opcodes:
    */ 
   vfmt->CallList = _save_CallList; /* inside begin/end */
   vfmt->CallLists = _save_CallLists; /* inside begin/end */
   vfmt->EvalCoord1f = _save_EvalCoord1f;
   vfmt->EvalCoord1fv = _save_EvalCoord1fv;
   vfmt->EvalCoord2f = _save_EvalCoord2f;
   vfmt->EvalCoord2fv = _save_EvalCoord2fv;
   vfmt->EvalPoint1 = _save_EvalPoint1;
   vfmt->EvalPoint2 = _save_EvalPoint2;

   /* These are all errors as we at least know we are in some sort of
    * begin/end pair:
    */
   vfmt->EvalMesh1 = _save_EvalMesh1;	
   vfmt->EvalMesh2 = _save_EvalMesh2;
   vfmt->Begin = _save_Begin;
   vfmt->Rectf = _save_Rectf;
   vfmt->DrawArrays = _save_DrawArrays;
   vfmt->DrawElements = _save_DrawElements;
   vfmt->DrawRangeElements = _save_DrawRangeElements;

}


void vbo_save_SaveFlushVertices( GLcontext *ctx )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   /* Noop when we are actually active:
    */
   if (ctx->Driver.CurrentSavePrimitive == PRIM_INSIDE_UNKNOWN_PRIM ||
       ctx->Driver.CurrentSavePrimitive <= GL_POLYGON)
      return;

   if (save->vert_count ||
       save->prim_count) 
      _save_compile_vertex_list( ctx );
   
   _save_copy_to_current( ctx );
   _save_reset_vertex( ctx );
   _save_reset_counters( ctx );  
   ctx->Driver.SaveNeedFlush = 0;
}

void vbo_save_NewList( GLcontext *ctx, GLuint list, GLenum mode )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   (void) list; (void) mode;

   if (!save->prim_store)
      save->prim_store = alloc_prim_store( ctx );

   if (!save->vertex_store) 
      save->vertex_store = alloc_vertex_store( ctx );
      
   save->vbptr = map_vertex_store( ctx, save->vertex_store );
   
   _save_reset_vertex( ctx );
   _save_reset_counters( ctx );  
   ctx->Driver.SaveNeedFlush = 0;
}

void vbo_save_EndList( GLcontext *ctx )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;

   /* EndList called inside a (saved) Begin/End pair?
    */
   if (ctx->Driver.CurrentSavePrimitive != PRIM_OUTSIDE_BEGIN_END) {

      if (save->prim_count > 0) {
         GLint i = save->prim_count - 1;
         ctx->Driver.CurrentSavePrimitive = PRIM_OUTSIDE_BEGIN_END;
         save->prim[i].end = 0;
         save->prim[i].count = (save->vert_count - 
                                save->prim[i].start);
      }

      /* Make sure this vertex list gets replayed by the "loopback"
       * mechanism:
       */
      save->dangling_attr_ref = 1;
      vbo_save_SaveFlushVertices( ctx );

      /* Swap out this vertex format while outside begin/end.  Any color,
       * etc. received between here and the next begin will be compiled
       * as opcodes.
       */   
      _mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
   }

   unmap_vertex_store( ctx, save->vertex_store );

   assert(save->vertex_size == 0);
}
 
void vbo_save_BeginCallList( GLcontext *ctx, struct mesa_display_list *dlist )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   save->replay_flags |= dlist->flags;
}

void vbo_save_EndCallList( GLcontext *ctx )
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   
   if (ctx->ListState.CallDepth == 1) {
      /* This is correct: want to keep only the VBO_SAVE_FALLBACK
       * flag, if it is set:
       */
      save->replay_flags &= VBO_SAVE_FALLBACK;
   }
}


static void vbo_destroy_vertex_list( GLcontext *ctx, void *data )
{
   struct vbo_save_vertex_list *node = (struct vbo_save_vertex_list *)data;
   (void) ctx;

   if ( --node->vertex_store->refcount == 0 ) 
      free_vertex_store( ctx, node->vertex_store );

   if ( --node->prim_store->refcount == 0 )
      FREE( node->prim_store );
}


static void vbo_print_vertex_list( GLcontext *ctx, void *data )
{
   struct vbo_save_vertex_list *node = (struct vbo_save_vertex_list *)data;
   GLuint i;
   (void) ctx;

   _mesa_debug(NULL, "VBO-VERTEX-LIST, %u vertices %d primitives, %d vertsize\n",
               node->count,
	       node->prim_count,
	       node->vertex_size);

   for (i = 0 ; i < node->prim_count ; i++) {
      struct _mesa_prim *prim = &node->prim[i];
      _mesa_debug(NULL, "   prim %d: %s%s %d..%d %s %s\n",
		  i, 
		  _mesa_lookup_enum_by_nr(prim->mode),
		  prim->weak ? " (weak)" : "",
		  prim->start, 
		  prim->start + prim->count,
		  (prim->begin) ? "BEGIN" : "(wrap)",
		  (prim->end) ? "END" : "(wrap)");
   }
}


static void _save_current_init( GLcontext *ctx ) 
{
   struct vbo_save_context *save = &vbo_context(ctx)->save;
   GLint i;

   for (i = VBO_ATTRIB_POS; i <= VBO_ATTRIB_GENERIC15; i++) {
      const GLuint j = i - VBO_ATTRIB_POS;
      ASSERT(j < VERT_ATTRIB_MAX);
      save->currentsz[i] = &ctx->ListState.ActiveAttribSize[j];
      save->current[i] = ctx->ListState.CurrentAttrib[j];
   }

   for (i = VBO_ATTRIB_FIRST_MATERIAL; i <= VBO_ATTRIB_LAST_MATERIAL; i++) {
      const GLuint j = i - VBO_ATTRIB_FIRST_MATERIAL;
      ASSERT(j < MAT_ATTRIB_MAX);
      save->currentsz[i] = &ctx->ListState.ActiveMaterialSize[j];
      save->current[i] = ctx->ListState.CurrentMaterial[j];
   }
}

/**
 * Initialize the display list compiler
 */
void vbo_save_api_init( struct vbo_save_context *save )
{
   GLcontext *ctx = save->ctx;
   GLuint i;

   save->opcode_vertex_list =
      _mesa_alloc_opcode( ctx,
			  sizeof(struct vbo_save_vertex_list),
			  vbo_save_playback_vertex_list,
			  vbo_destroy_vertex_list,
			  vbo_print_vertex_list );

   ctx->Driver.NotifySaveBegin = vbo_save_NotifyBegin;

   _save_vtxfmt_init( ctx );
   _save_current_init( ctx );

   /* These will actually get set again when binding/drawing */
   for (i = 0; i < VBO_ATTRIB_MAX; i++)
      save->inputs[i] = &save->arrays[i];

   /* Hook our array functions into the outside-begin-end vtxfmt in 
    * ctx->ListState.
    */
   ctx->ListState.ListVtxfmt.Rectf = _save_OBE_Rectf;
   ctx->ListState.ListVtxfmt.DrawArrays = _save_OBE_DrawArrays;
   ctx->ListState.ListVtxfmt.DrawElements = _save_OBE_DrawElements;
   ctx->ListState.ListVtxfmt.DrawRangeElements = _save_OBE_DrawRangeElements;
   _mesa_install_save_vtxfmt( ctx, &ctx->ListState.ListVtxfmt );
}