Quick Texture/Memory Question

Blitz3D Forums/Blitz3D Programming/Quick Texture/Memory Question

Red Ocktober

(Posted 2006) [#1]

does Blitz3D share memory of the same texture if it is used on another part... i mean, the same texture is not reloaded again and using additional memory... is it?

thx

--Mike

Naughty Alien

(Posted 2006) [#2]

I think no, unless same texture is loaded under different file name...

markcw

(Posted 2006) [#3]

AvailVidMem() is your friend. :)

Actually, I've never bothered to check it until now. Here's a quick test of video memory. It shows one texture applied to 1 or 3 cubes. Availvidmem is the same in both cases (set the var 'loadmorecubes' to 0).

; Texture Memory Test
; -------------------

Graphics3D 640,480,16,2
SetBuffer BackBuffer()

camera=CreateCamera()
light=CreateLight()
RotateEntity light,90,0,0

cube=CreateCube()
PositionEntity cube,0,0,5

loadmorecubes=1 ;<-- extra cubes switch, 0=one cube

If loadmorecubes<>0 ;Load the extra cubes
 cube2=CreateCube()
 PositionEntity cube2,3,0,5
 cube3=CreateCube()
 PositionEntity cube3,-3,0,5
EndIf

tex=CreateTexture(256,256) ;Create texture of size 256x256
SetBuffer TextureBuffer(tex) ;Set buffer - texture buffer
ClsColor 255,255,255 ;Clear texture buffer with background white color
Cls
font=LoadFont("arial",24) ; Draw text on texture
SetFont font
Color 0,0,0
Text 0,0,"This texture"
Text 0,40,"was created using" : Color 0,0,255
Text 0,80,"CreateTexture()" : Color 0,0,0
Text 0,120,"and drawn to using" : Color 0,0,255
Text 0,160,"SetBuffer TextureBuffer()"
SetBuffer BackBuffer() ;Set buffer - backbuffer
EntityTexture cube,tex ;Texture cube with texture

If loadmorecubes<>0 ;Texture the extra cubes
 EntityTexture cube2,tex
 EntityTexture cube3,tex
EndIf

While Not KeyDown(1)

 pitch#=0
 yaw#=0
 roll#=0
 If KeyDown(208) Then pitch#=-1 
 If KeyDown(200) Then pitch#=1
 If KeyDown(203) Then yaw#=-1
 If KeyDown(205) Then yaw#=1
 If KeyDown(45) Then roll#=-1
 If KeyDown(44) Then roll#=1
 TurnEntity cube,pitch#,yaw#,roll#

 If loadmorecubes<>0 ;Spin the extra cubes
  TurnEntity cube2,pitch#,yaw#,roll#
  TurnEntity cube3,pitch#,yaw#,roll#
 EndIf

RenderWorld

 totalmem#=Float(TotalVidMem())/1000000 ;get memory in mb's
 availmem#=Float(AvailVidMem())/1000000
 Text 0,0," total="+Totalmem+"mb, avail="+availmem+"mb"

Flip
Wend
End

Red Ocktober

(Posted 2006) [#4]

thx guys...

--Mike