changing graphics modes

BlitzMax Forums/BlitzMax Beginners Area/changing graphics modes

jkrankie

(Posted 2005) [#1]

is there any way to change what graphic mode you are in while your program is running? i want to present users with a dialog box where they can change what resolution and weather they want windowed of full screen mode.

if it makes any difference, i'm using bMax1.10 on mac os x

cheers
charlie

Stuart Morgan

(Posted 2005) [#2]

To change graphics mode when the program is running I would assume it would be something like this...

Graphics 800,600,16,0

While Not KeyHit(KEY_ESCAPE)

	SetColor 255,255,255
	DrawText "Select graphics mode:",20,20
	DrawText "--------------------",20,40
	DrawText "1) Fullscreen mode",20,60
	DrawText "2) Windowed mode",20,80
	
	' change to fullscreen mode
	If KeyHit(KEY_1)
		EndGraphics
		FlushMem
		Graphics 800,600,16,0
	EndIf
	
	' change to windowed mode
	If KeyHit(KEY_2)
		EndGraphics
		FlushMem
		Graphics 800,600,0,0
	EndIf

	Flip
	FlushMem
	Cls
Wend
End

But if you change to windowed mode and then change back to fullscreen I get a unhandled memory exception error.

Can anybody tell me if this a bug or am I coding something wrong here?

jkrankie

(Posted 2005) [#3]

yep, my program looks similar to that.

i get this error: "2005-06-10 13:09:02.274 boxtest[17583] invalid drawable"

when trying to change to anything, also im starting in windowed mode.

Perturbatio

(Posted 2005) [#4]

.
waited far too long to post

Stuart Morgan

(Posted 2005) [#5]

waited far too long to post

Is my code correct then? Is it a bug?

Perturbatio

(Posted 2005) [#6]

it would appear to be a problem with the graphics command in some manner yes.

SetGraphicsDriver(GLMax2DDriver())
Graphics 800,600,0,0

Global usingBGL = False

While Not KeyHit(KEY_ESCAPE)

	SetColor 255,255,255
	
	If usingBGL Then
		bglDrawText "Select graphics mode:",20,20
		bglDrawText "--------------------",20,40
		bglDrawText "1) Fullscreen mode",20,60
		bglDrawText "2) Windowed mode",20,80
		
	Else
		
		DrawText "Select graphics mode:",20,20
		DrawText "--------------------",20,40
		DrawText "1) Fullscreen mode",20,60
		DrawText "2) Windowed mode",20,80

	EndIf

	
	' change to fullscreen mode
	If KeyHit(KEY_1)
		EndGraphics
		FlushMem
		
		usingBGL =True
		'Graphics 800,600,32,0
		bglCreateContext(800,600,16,0, BGL_FULLSCREEN|BGL_BACKBUFFER)
		
	EndIf
	
	' change to windowed mode
	If KeyHit(KEY_2)
		'EndGraphics
		bglSwapBuffers()
		bglDeleteContext
		FlushMem
		usingBGL = False
		Graphics 800,600,0,0
	EndIf


	If usingBGL then
		bglSwapBuffers()
		FlushMem
	Else
		Flip
		FlushMem
		Cls
	EndIf
Wend
End

I was messing around with it and you can create a fullscreen GL context and switch back to window mode without issue (it does stop rendering the text when you switch to fullscreen for the second time, but that's *probably* a seperate issue).
There is no exception produced using the above.

Yan	(Posted 2005) [#7]

...Wot e said...^^^^^^^

Although I didn't have any font problems.

jkrankie

(Posted 2005) [#8]

cheers Perturbatio, hadn't realised there was a command called endgraphics

cheers
charlie

Yan	(Posted 2005) [#9]

Oh wait, after reading it properly...Not what he said.

The first code sample works perfectly if you set the gl driver first. So probably a bug with the DX7 implementation.

SetGraphicsDriver GLMax2DDriver()

Graphics 800,600,16,0

While Not KeyHit(KEY_ESCAPE)

	SetColor 255,255,255
	DrawText "Select graphics mode:",20,20
	DrawText "--------------------",20,40
	DrawText "1) Fullscreen mode",20,60
	DrawText "2) Windowed mode",20,80
	
	' change to fullscreen mode
	If KeyHit(KEY_1)
		EndGraphics
		FlushMem
		Graphics 800,600,16,0
	EndIf
	
	' change to windowed mode
	If KeyHit(KEY_2)
		EndGraphics
		FlushMem
		Graphics 800,600,0,0
	EndIf

	Flip
	FlushMem
	Cls
Wend
End

SillyPutty

(Posted 2005) [#10]

only the second example works for me

however, on the second interation of the mode change, you cannot see the text in fullscreen mode.

rod54

(Posted 2005) [#11]

I can keep clicking on full frame mode (1) and gives new full frame, and it can go to window mode where and if I keep clicking window mode(2) it creates a new window every time but from window mode if I click full frame it exits with out an esc.