Gdiplus [36]: Data in the igpgraphicspath (3) path

Igpgraphicspath. pointcount; // the total number of points igpgraphicspath. pathpoints; // vertex array, floating point igpgraphicspath. pathpointsi; // vertex array, integer igpgraphicspath. pathtypes; // point type array igpgraphicspath. pathdata; // point and point data; igppathdata type igpgraphicspath. getlastpoint; // igpgraphicspath. reverse; // reverse the point order igpgraphicspath. getbounds (); // obtain the enclosed rectangle

  {About the vertex type (it is a byte value )} 0 // indicates that this vertex is the starting point of the graph. 1 // indicates that this vertex is one of the two ending points of a line segment. 3 // indicates that this vertex isCubeThe end point or control point of the besell spline $7 // used for three-bit mask operations, it should not actually exist $20 // specify this point as a marker (TAG) $80 // specify that this point is the last point in the closed sub-path (graph) // The actual read value. Otherwise, the point should have a dual identity.

  
 

Pathpoints, pathtypes, and pathdata test charts:

Pathpoints, pathtypes, and pathdata Test Code :

 uses gdiplus; Procedure convert (Sender: tobject); var graphics: igpgraphics; Path: igpgraphicspath; brush, brushpt, brushtext: igpsolidbrush; Pt: tgppointf; pttype: byte; I: integer; begin graphics: = tgpgraphics. create (handle); brush: = tgpsolidbrush. create ($ ffc0c0c0); brushpt: = tgpsolidbrush. create ($80ff0000); brushtext: = tgpsolidbrush. create ($ ff000000); Path: = tgpgraphicspath. create; Path. addstring ('A', tgpfontfamily. create ('arial black'), [], 200, tgppoint. create (0, 0), nil); Path. addellipse (210, 76,100,144); graphics. fillpath (brush, PATH); for I: = 0 to path. pointcount-1 do begin PT: = path. pathpoints [I]; pttype: = path. pathtypes [I]; // The last two rows can also be written: // PT: = path. pathdata. points [I]; // pttype: = path. pathdata. types [I]; graphics. fillrectangle (brushpt, PT. x-3, PT. y-3 (6, 6); graphics. drawstring (format ('% x', [pttype]), tgpfont. create (canvas. handle), Pt, brushtext); end;

   

Test code for getlastpoint, reverse, and pathpointsi:

 
Uses gdiplus; Procedure tform1.formpaint (Sender: tobject); var path: igpgraphicspath; ptstart: tgppoint; ptend: tgppointf; begin path: = tgpgraphicspath. create; Path. addrectangle (tgprect. create (1, 2, 3, 4); ptstart: = path. pathpointsi [0]; ptend: = path. getlastpoint; showmessagefmt ('% d; % d, % G; % G', [ptstart. x, ptstart. y, ptend. x, ptend. y]); {(1; 2), (1; 6)} path. reverse; ptstart: = path. pathpointsi [0]; ptend: = path. getlastpoint; showmessagefmt ('% d; % d, % G; % G', [ptstart. x, ptstart. y, ptend. x, ptend. y]); {(1; 6), (1; 2)} end;

  
 

Getbounds test diagram:

Getbounds test code:

 uses gdiplus; Procedure tform1.formpaint (Sender: tobject); var graphics: igpgraphics; Path: igpgraphicspath; pen: igppen; rect: tgprect; begin graph: = tgpgraphics. create (handle); pen: = tgppen. create ($ ffff0000, 2); Path: = tgpgraphicspath. create; Path. addline (20, 20,150,100); graphics. drawpath (pen, PATH); pen. width: = 1; pen. color: = $ ffc0c0c0; Path. getbounds (rect); graphics. drawrectangle (pen, rect); end;