DrawVectorText; catch image from textgadget;

[HanPBF]

Hello!

Just styling some things and I have still the annoying DrawVectorText which draw text not as "clear" as windows does.

In the forum it is said, graphical text cannot be like windows text.

So, only solution is to copy pixels from a text gadget and fill it in a canvas???

Any other idea to let text not be shown like on a 30 year old screen?
Is there a way to catchImage from a window native gadget?


Thanks a lot!

[netmaestro]

Should do for a textgadget:

Code: Select all

Global SnapShot_Active = 0

Procedure WinCallBack(hwnd, msg, wparam, lparam)
  result = #PB_ProcessPureBasicEvents
  Select msg
    Case #WM_CTLCOLORSTATIC
      If SnapShot_Active And lparam = GadgetID(0)
        SnapShot_Active = 0
        hDC_src = wparam
        CreateImage(0, GadgetWidth(0), GadgetHeight(0), 24)
        hDC_dst = StartDrawing(ImageOutput(0))
        BitBlt_(hDC_dst,0,0,ImageWidth(0),ImageHeight(0),hDC_src,0,0,#SRCCOPY)
        StopDrawing()
        ImageGadget(2,10,50,0,0,ImageID(0))
      EndIf
  EndSelect
  ProcedureReturn result
EndProcedure

Procedure Button_1_Methods()
  SnapShot_Active = 1
  InvalidateRect_(GadgetID(0),0,1)
EndProcedure

OpenWindow(0,0,0,320,240,"",#PB_Window_ScreenCentered|#PB_Window_SystemMenu)
SetWindowCallback(@WinCallBack())
LoadFont(0, "Arial", 12, #PB_Font_Bold|#PB_Font_Italic)
TextGadget(0, 10,10,200,25,"Hello World!")
SetGadgetColor(0, #PB_Gadget_FrontColor, #Blue)
SetGadgetFont(0, FontID(0))
ButtonGadget(1, 10,210,300,20,"Take picture of text gadget now...")
BindGadgetEvent(1,@Button_1_Methods())
Repeat:Until WaitWindowEvent() = #PB_Event_CloseWindow

[kenmo]

Try the DrawText_() API function for better text, see my example here:
http://www.purebasic.fr/english/viewtop ... 85#p474574

[RASHAD]

Hi HanPBF
Can you post some code ?
I did not see any difference
Next snippet you can play with a special created font of yours
PB 5.42 x86 Windows 10 x64

http://www.purebasic.fr/english/viewtop ... 27&t=62077

Code: Select all

If OpenWindow(0, 0, 0, 400, 200, "VectorDrawing", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
    CanvasGadget(0, 0, 0, 400, 200)
    LoadImage(0, #PB_Compiler_Home + "examples/Sources/Data/PureBasicLogo.bmp")
    LoadFont(0, "Arial", 32,#PB_Font_Bold)    
       
    Fnt.LOGFONT
    Fnt\lfHeight         = 72
    Fnt\lfWeight         = 700
    Fnt\lfCharSet        = #DEFAULT_CHARSET
    Fnt\lfOutPrecision   = #OUT_STROKE_PRECIS
    Fnt\lfClipPrecision  = #CLIP_STROKE_PRECIS
    Fnt\lfQuality        = #NONANTIALIASED_QUALITY
    Fnt\lfPitchAndFamily = #DEFAULT_PITCH | #FF_DONTCARE
    PokeS(@Fnt\lfFaceName[0], "Arial")
    Clearfont = CreateFontIndirect_(Fnt)
    
    If StartVectorDrawing(CanvasVectorOutput(0))    
      VectorFont(FontID(0), 32)
      VectorSourceColor($FF2F33FF)
      Text$ = "The quick brown fox jumped"
      MovePathCursor(200 - VectorTextWidth(Text$)/2, 10 - VectorTextHeight(Text$)/2)
      DrawVectorImage(ImageID(0), 255,400,200)
      MovePathCursor(200 - VectorTextWidth(Text$)/2, 50 - VectorTextHeight(Text$)/2)
      DrawVectorText(Text$)
      VectorFont(Clearfont, 32)
      MovePathCursor(200 - VectorTextWidth(Text$)/2, 100 - VectorTextHeight(Text$)/2)
      DrawVectorText(Text$)
      StopVectorDrawing()
    EndIf
    
    Repeat
      Event = WaitWindowEvent()
    Until Event = #PB_Event_CloseWindow
  EndIf

[HanPBF]

Thanks for all the help.

Hello RASHAD!
Maybe because I am using still 5.41.

[HanPBF]

got my project at office site running under PB 5.50.

Idea is to "overdraw" some gadgets with Your tips.

Thanks a lot !

[HanPBF]

Hello RASHAD,

I've checked Your example and changed it a little:

Code: Select all

If OpenWindow(0, 0, 0, 400, 200, "VectorDrawing", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
		textgadget(1, 0, 0, 400, 32, "The quick brown fox")
    CanvasGadget(0, 0, 30, 400, 200)
    LoadFont(0, "Arial", 12)   
       
    setgadgetcolor(1,#PB_Gadget_BackColor,#White)
    SetGadgetFont(1, fontid(0))
    
    Fnt.LOGFONT
    Fnt\lfHeight         = 18
    Fnt\lfWeight         = 700
    Fnt\lfCharSet        = #DEFAULT_CHARSET
    Fnt\lfOutPrecision   = #OUT_STROKE_PRECIS
    Fnt\lfClipPrecision  = #CLIP_STROKE_PRECIS
    Fnt\lfQuality        = #NONANTIALIASED_QUALITY
    Fnt\lfPitchAndFamily = #DEFAULT_PITCH | #FF_DONTCARE
    PokeS(@Fnt\lfFaceName[0], "Arial")
    Clearfont = CreateFontIndirect_(Fnt)
   
    If StartVectorDrawing(CanvasVectorOutput(0))   
      VectorFont(FontID(0))
      VectorSourceColor(RGBA(0,0,0,255))
      Text$ = "The quick brown fox"
      MovePathCursor(200 - VectorTextWidth(Text$)/2, 10 - VectorTextHeight(Text$)/2)
      MovePathCursor(200 - VectorTextWidth(Text$)/2, 50 - VectorTextHeight(Text$)/2)
      DrawVectorText(Text$)
      VectorFont(Clearfont)
      MovePathCursor(200 - VectorTextWidth(Text$)/2, 100 - VectorTextHeight(Text$)/2)
      DrawVectorText(Text$)
      StopVectorDrawing()
    EndIf
   
    Repeat
      Event = WaitWindowEvent()
    Until Event = #PB_Event_CloseWindow
  EndIf

Hopefully, even depending on OS, You should see a different rendering of all text lines; while the rendering of text gadget is the clearest from all.

Even the third line of "The quick brown fox" is bold, You shall see missing antialiasing.
Even setting #ANTIALIASED_QUALITY did not change result.

Effect can not be seen for bigger fonts.