Gdiplus [45]: igpgraphics (4) about rendering quality and synthesis Mode

Related content:

 
Igpgraphics. smoothingmode; {drawing quality} igpgraphics. interpolationmode; {interpolation mode} igpgraphics. compositingmode; {combination of foreground and background colors} igpgraphics. compositingquality; {image synthesis quality} igpgraphics. pixeloffsetmode; {pixel offset mode} {used for text rendering quality} igpgraphics. textrenderinghint; {text rendering mode} igpgraphics. textcontrast; {text gray correction positive value (eliminating Gamma Correction for sawtooth and cleartype text )}

  
 

Related parameters:

Smoothingmode {the path gradient Paint Brush cannot be controlled for the edges of straight lines, curves, and filled areas.} invalid // an invalid mode default // do not eliminate the sawtooth, equivalent to highspeed and nonehighspeed // do not remove sertices highquality // eliminate sertices, equivalent to antialiasnone // do not remove sertices antialias // remove sertices
  
   
 Interpolationmode {interpolation mode determines how to calculate the median between two pixels} invalid // an invalid element equivalent to the qualitymode enumeration. default // default mode. low // low-quality interpolation method. high // high quality interpolation method. bilinear // bilinear interpolation; no pre-screening; this mode is not applicable when the image is reduced to less than 50% of the original size. bicubic // double three-step interpolation; no pre-screening; this mode is not applicable when the image is reduced to less than 25% of the original size. nearestneighbor // near interpolation method. highqualitybilinear // high quality bilinear interpolation method; performs pre-screening to ensure high quality shrinkage. highqualitybicubic // high quality double three interpolation method; performs pre-screening to ensure high quality shrinkage; produces the highest quality conversion image.
  
   
 Compositingmode {color merging mode} sourceover // mixed with the background color; this mixture is determined by the transparency sourcecopy // rewrite the background color
  
   
 Compositingquality {during image synthesis, source pixel and target pixel and synthesis method} invalid // invalid quality default // default quality highspeed // high speed, low quality highquality // high quality, low speed Compound gammacorrected // use Grayscale Correction assumelinear/ /assume the Linear Value
  
   
 Pixeloffsetmode {pixel offset mode} invalid // invalid mode. default // default mode. highspeed // high speed, low quality rendering. highquality // high quality, low speed presentation. NONE // No pixel offset. half // the horizontal and vertical distances of pixels are both offset-0.5 units for high-speed sawtooth elimination.
  
   
 

Smoothingmode test:

 
Uses gdiplus; Procedure tform1.formpaint (Sender: tobject); var graphics: igpgraphics; pen: igppen; rect: tgprectf; I: integer; begin graphics: = tgpgraphics. create (handle); pen: = tgppen. create ($ ffb22222, 4); rect. initialize (clientwidth * 3/8, clientheight * 3/8, clientwidth/4, clientheight/4); for I: = 0 to 4 Do begin graphics. smoothingmode: = tgpsmoothingmode (I); graphics. drawellipse (pen, rect); rect. inflate (clientwidth/14, clientheight/14); end;

  
 

Interpolationmode test:

Uses gdiplus; Procedure tform1.formpaint (Sender: tobject); var graphics: igpgraphics; Image: igpimage; rect: tgprectf; I: integer; begin graphics: = tgpgraphics. create (handle); Image: = tgpimage. create ('C: \ gdiplusimg \ grapes.jpg '); rect. initialize (10, 10, image. width * 0.5, image. height * 0.5); for I: = 0 to 7 do begin graphics. interpolationmode: = tgpinterpolationmode (I); graphics. drawimage (image, rect); rect. offset (rect. width + 10, 0); If rect. X + rect. width> clientwidth then begin rect. x: = 10; rect. offset (0, rect. height + 10); end; Procedure tform1.formresize (Sender: tobject); begin repaint; end;

  
 

Compositingmode test:

Uses gdiplus; Procedure tform1.formpaint (Sender: tobject); var graphics: igpgraphics; brush: igplineargradientbrush; rect: tgprect; begin graphics: = tgpgraphics. create (handle); rect. initialize (20, 20,200, 60); brush: = tgplineargradientbrush. create (rect, $ ffa52a2a, $ ffffff00, 0); graphics. compositingmode: = compositingmodesourceover; // default mode: graphics. fillrectangle (brush, rect); brush: = tgplineargradientbrush. create (rect, $ 80a52a2a, $80ffff00, 0); graphics. compositingmode: = compositingmodesourceover; rect. offset (0, 20 + rect. height); graphics. fillrectangle (brush, rect); graphics. compositingmode: = compositingmodesourcecopy; rect. offset (0, 20 + rect. height); graphics. fillrectangle (brush, rect); end;

  
 

Compositingquality test:

Uses gdiplus; procedure merge (Sender: tobject); var graphics: igpgraphics; Image: igpimage; rect: tgprectf; brush: igpsolidbrush; I: integer; begin graphics: = tgpgraphics. create (handle); Image: = tgpimage. create ('C: \ gdiplusimg \ grapes.jpg '); rect. initialize (10, 10, image. width * 0.75, image. height * 0.75); brush: = tgpsolidbrush. create ($ 800000ff); for I: = 0 to 4 Do begin graphics. compositingquality: = tgpcompositingquality (I); graphics. drawimage (image, rect); graphics. fillrectangle (brush, rect); rect. offset (rect. width + 10, 0); If rect. X + rect. width> clientwidth then begin rect. x: = 10; rect. offset (0, rect. height + 10); end; Procedure tform1.formresize (Sender: tobject); begin repaint; end;

  
 

Pixeloffsetmode test:

 uses gdiplus; Procedure injection (Sender: tobject); var graphics: igpgraphics; brushback: igphatchbrush; brush: igpsolidbrush; rect: tgprectf; I: integer; begin graphics: = tgpgraphics. create (handle); brushback: = tgphatchbrush. create (hatchstylecross, $ ffd0d0d0, $ ffffffff); graphics. fillrectangle (brushback, tgprect. create (clientrect); rect. initialize (0.34, 1, 5.1, 1.3); brush: = tgpsolidbrush. create ($80ff0000); graphics. scaletransform (27.3, 17.3); for I: = 0 to 4 Do begin graphics. pixeloffsetmode: = tgppixeloffsetmode (I); graphics. fillrectangle (brush, rect); rect. offset (0, rect. height + 1); end;