[PB4.0 final]CreateSprite(... #PB_Sprite_Alpha) works not...

IceSoft · **Posted:** Fri May 12, 2006 6:51 am

CreateSprite(0,10,10, #PB_Sprite_Alpha) returns '0'´
All others working correct.

Code:

InitSprite()

hWnd = OpenWindow(0, 0, 0,800,600,"#PB_Sprite_Alpha - Test") 
OpenWindowedScreen(hWnd,0,0,800,600,0,0,0)


Debug CreateSprite(0,10,10, #PB_Sprite_Alpha)
Debug CreateSprite(1,10,10, #PB_Sprite_Memory)
Debug CreateSprite(2,10,10, #PB_Sprite_Texture)
Debug CreateSprite(3,10,10)
Debug CreateSprite(4,10,10,0)

netmaestro · **Joined:** Wed Jul 06, 2005 5:42 am **Posts:** 6465

It's not something you want to do anyway as the DisplayAlphaSprite() command docs strongly suggest StartSpecialFX() to speed the operation up, for which #PB_Sprite_Memory is a requirement. Retry your test with:

Code:

Debug CreateSprite(0,10,10, #PB_Sprite_Alpha|#PB_Sprite_Memory)

and see if it succeeds. If so, should be no problem imho. (assuming I'm not out to lunch)

Demivec · **Posted:** Mon May 07, 2012 7:59 pm

CreateSprite(... #PB_Sprite_AlphaBlending) seems to be working fine in PB 4.61b2.

Tested under XP Sp3 x86 using both DirectX7 and DirectX9 using:

Code:

InitSprite()

OpenWindow(0, 0, 0,800,600,"#PB_Sprite_Alpha - Test") 
OpenWindowedScreen(WindowID(0),0,0,800,600,0,0,0)


Debug CreateSprite(0,10,10, #PB_Sprite_AlphaBlending)
Debug CreateSprite(1,10,10, #PB_Sprite_Memory)
Debug CreateSprite(2,10,10, #PB_Sprite_Texture)
Debug CreateSprite(3,10,10)
Debug CreateSprite(4,10,10,0)

netmaestro · **Joined:** Wed Jul 06, 2005 5:42 am **Posts:** 6465

Note that #PB_Sprite_Alpha and #PB_Sprite_Alphablending serve two completely different purposes.

Demivec wrote:

CreateSprite(... #PB_Sprite_AlphaBlending) seems to be working fine in PB 4.61b2.

Yes you're right it works; however it's not good for much because of a bug in drawing the alpha layer to a sprite.
This code is tested here working under Directx7 and fails under Directx9 and OpenGL:

Code:

InitSprite():InitSprite3D()
OpenWindow(0,0,0,320,240,"",#PB_Window_SystemMenu|#PB_Window_ScreenCentered)
OpenWindowedScreen(WindowID(0),0,0,128,128,0,0,0)
CreateSprite(0,128,128,#PB_Sprite_Texture|#PB_Sprite_AlphaBlending)
CreateImage(0,128,128,32|#PB_Image_Transparent)
StartDrawing(ImageOutput(0))
  DrawingMode(#PB_2DDrawing_AllChannels)
  Circle(64,64,40,RGBA(0,0,200,255))
StopDrawing()
StartDrawing(SpriteOutput(0))
  DrawAlphaImage(ImageID(0),0,0)
StopDrawing()
CreateSprite3D(0,0)
ImageGadget(0,128,0,128,128,ImageID(0))
quit=0
Repeat
  Repeat
    EventID = WindowEvent()
    If EventID = #PB_Event_CloseWindow
      quit=1
      Break
    EndIf
  Until EventID = 0
  ClearScreen(GetSysColor_(#COLOR_3DFACE))
  Start3D()
    DisplaySprite3D(0,0,0)
  Stop3D()
  FlipBuffers()
Until quit

Until it gets fixed the only good way to get an alpha layer onto a sprite is via LoadSprite or CatchSprite as drawing to it is currently bugged.

Demivec · **Posted:** Tue May 08, 2012 6:41 am

netmaestro wrote:

Note that #PB_Sprite_Alpha and #PB_Sprite_Alphablending serve two completely different purposes.

True they are different, but since the original example used #PB_Sprite_Alpha, which isn't used with CreateSprite() it had to be changed to the correct one.

netmaestro wrote:

Yes you're right it works; however it's not good for much because of a bug in drawing the alpha layer to a sprite.
This code is tested here working under Directx7 and fails under Directx9 and OpenGL:

netmaestro wrote:

Until it gets fixed the only good way to get an alpha layer onto a sprite is via LoadSprite or CatchSprite as drawing to it is currently bugged.

I appreciate the additional example and I agree that there are still other areas that can be improved. I was trying to stay focused and simply evaluate the issue being reported here to see if anything had been fixed with the progression of PureBasic from the time this was reported.

Apparently the original problem was probably mis-posted by using the wrong constant. Whatever the case, CreateSprite() functions in the situation that was originally referenced.

[blendman] · **Posted:** Tue May 08, 2012 8:22 am

Hi

In windows Xp sp2 (x86) - Pb4.61b2, the first CreateSprite() returns 0, with directX 9 :

Code:

Debug CreateSprite(0,10,10, #PB_Sprite_AlphaBlending)

The other lines are ok (with directX9).

With DirectX 7, all lines are ok.

CG nvidia Geforce 9800 GTX+

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