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digitalmars.D.learn - Troubles with devisualization/window

reply "ddos" <oggs gmx.at> writes:
Hi!

i'm trying to get devisualization/window [1] working with some 
simple opengl calls. I have created a windows with opengl context 
using

Window window = new Window(800, 600, "My window!"w, 
WindowContextType.Opengl);

If i run
writeln("type: ", context.type);
writeln("toolkit version: ", context.toolkitVersion);
writeln("shading language version: ", 
context.shadingLanguageVersion);
i get correct information
has context
type: Opengl
toolkit version: 4.5.0 NVIDIA 347.09
shading language version: 4.50 NVIDIA

First i tried to simply call glClearColor(1,0,0,1);, this crashes 
the application (Program exited with code -1073741819)

I checked the function pointer with if(cast(void*)glClearColor 
!is null){...} and well ... it's a nullpointer the first two 
frames. Then i checked for nullpointer and called 
glClearColor(...) and glClear(...) -> no crash but the window was 
just frozen.

Does anyone use Devisualization/window on Windows with success?
Fyi, if i dont do any opengl calls the window seems to work, i 
can close it normally, it's completely white.

My example sourcecode can be found here:
https://github.com/oggs91/OpenVG_D/blob/master/demo_DvisualizationWT/source/app.d


[1] https://github.com/Devisualization/window
Apr 06 2015
parent reply Rikki Cattermole <alphaglosined gmail.com> writes:
On 7/04/2015 10:07 a.m., ddos wrote:

 Hi!

 i'm trying to get devisualization/window [1] working with some simple
 opengl calls. I have created a windows with opengl context using

 Window window = new Window(800, 600, "My window!"w,
 WindowContextType.Opengl);

 If i run
 writeln("type: ", context.type);
 writeln("toolkit version: ", context.toolkitVersion);
 writeln("shading language version: ", context.shadingLanguageVersion);
 i get correct information
 has context
 type: Opengl
 toolkit version: 4.5.0 NVIDIA 347.09
 shading language version: 4.50 NVIDIA

 First i tried to simply call glClearColor(1,0,0,1);, this crashes the
 application (Program exited with code -1073741819)

 I checked the function pointer with if(cast(void*)glClearColor !is
 null){...} and well ... it's a nullpointer the first two frames. Then i
 checked for nullpointer and called glClearColor(...) and glClear(...) ->
 no crash but the window was just frozen.

 Does anyone use Devisualization/window on Windows with success?
 Fyi, if i dont do any opengl calls the window seems to work, i can close
 it normally, it's completely white.

 My example sourcecode can be found here:
 https://github.com/oggs91/OpenVG_D/blob/master/demo_DvisualizationWT/source/app.d



 [1] https://github.com/Devisualization/window


1) You need to check that the context has been created
	window.addOnDraw((Windowable window2) {
		IContext context = window.context;
		if (context !is null) {
2) The context needs to be activated
	bool hitContext;
	while(true) {
		import core.thread : Thread;
		import core.time : dur;
		Window.messageLoopIteration();

		IContext context = window.context;
		if (window.hasBeenClosed)
			break;
		else if (context !is null) {
			if (!hitContext) {
				context.activate;
				// init opengl stuff
				hitContext = true;
			}

			window.onDraw;
		}
		Thread.sleep(dur!"msecs"(25));
	}
2 handles 1 already, so you don't need to add 1 only 2.
Apr 06 2015
parent reply "ddos" <oggs gmx.at> writes:
it's getting warmer, window doesnt freeze anymore and opengl 
calls don't crash the window, but it's still all white after 
calling
glClearColor(1,0,1,1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

updated src: 
https://github.com/oggs91/OpenVG_D/blob/master/demo_DvisualizationWT/source/app.d
Apr 06 2015
parent reply Rikki Cattermole <alphaglosined gmail.com> writes:
On 7/04/2015 10:34 a.m., ddos wrote:

 it's getting warmer, window doesnt freeze anymore and opengl calls don't
 crash the window, but it's still all white after calling
 glClearColor(1,0,1,1);
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

 updated src:
 https://github.com/oggs91/OpenVG_D/blob/master/demo_DvisualizationWT/source/app.d


Ohhh right, call swapBuffers on the context after drawing. Probably be 
in the run loop (while).
Apr 06 2015
parent reply "ddos" <oggs gmx.at> writes:
On Monday, 6 April 2015 at 22:56:15 UTC, Rikki Cattermole wrote:

 On 7/04/2015 10:34 a.m., ddos wrote:

 it's getting warmer, window doesnt freeze anymore and opengl 
 calls don't
 crash the window, but it's still all white after calling
 glClearColor(1,0,1,1);
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

 updated src:
 https://github.com/oggs91/OpenVG_D/blob/master/demo_DvisualizationWT/source/app.d


 Ohhh right, call swapBuffers on the context after drawing. 
 Probably be in the run loop (while).


thanks a lot, problems fixed now, i've missing your test example 
:) if anyone else has problems -> this works 
https://github.com/Devisualization/window/blob/master/test/main.d

to get the vector graphics working i had to make a small change 
in the pixelformatdescriptor
https://github.com/Devisualization/window/blob/master/platforms/win32/devisualization/window/context/opengl.d
PIXELFORMATDESCRIPTOR, changed stencil buffer bits from 0 to 8
you may want to change this to default 8 to avoid problems.

http://imgur.com/ME4b6ZO
Apr 06 2015
parent Rikki Cattermole <alphaglosined gmail.com> writes:
On 7/04/2015 12:10 p.m., ddos wrote:

 On Monday, 6 April 2015 at 22:56:15 UTC, Rikki Cattermole wrote:

 On 7/04/2015 10:34 a.m., ddos wrote:

 it's getting warmer, window doesnt freeze anymore and opengl calls don't
 crash the window, but it's still all white after calling
 glClearColor(1,0,1,1);
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

 updated src:
 https://github.com/oggs91/OpenVG_D/blob/master/demo_DvisualizationWT/source/app.d


 Ohhh right, call swapBuffers on the context after drawing. Probably be
 in the run loop (while).


 thanks a lot, problems fixed now, i've missing your test example :) if
 anyone else has problems -> this works
 https://github.com/Devisualization/window/blob/master/test/main.d

 to get the vector graphics working i had to make a small change in the
 pixelformatdescriptor
 https://github.com/Devisualization/window/blob/master/platforms/win32/devisualization/window/context/opengl.d

 PIXELFORMATDESCRIPTOR, changed stencil buffer bits from 0 to 8
 you may want to change this to default 8 to avoid problems.

 http://imgur.com/ME4b6ZO


Tagged v0.1.1
Apr 06 2015