Bug 92020

Hi zeif,

This looks like a user error, rather than a mesa bug.

Namely, I suspect that you're feeding attrib as defined by some extension, without first checking if the latter is available. Is that the case ?

For example if you want to use WGL_DEPTH_TEXTURE_FORMAT_NV, you should first check for the WGL_NV_render_depth_texture extension.

(In reply to Emil Velikov from comment #1)
> Hi zeif,
> 
> This looks like a user error, rather than a mesa bug.
> 
> Namely, I suspect that you're feeding attrib as defined by some extension,
> without first checking if the latter is available. Is that the case ?
> 
> For example if you want to use WGL_DEPTH_TEXTURE_FORMAT_NV, you should first
> check for the WGL_NV_render_depth_texture extension.





/////////////////////////////////////////////////////////////////

Thx ：

I was a rookie at opengl..

But ， Android source code do the same things as me.

So, I push mesa to Emulator's folder.

Android Emulator is not work..


/////////////////////////////////////////////////////////////////

// Android source code : 

//http://androidxref.com/4.3_r2.1/xref/sdk/emulator/opengl/host/libs/Translator/EGL/EglWindowsApi.cpp#498



int pbAttribs[] = {
                   WGL_TEXTURE_TARGET_ARB   ,wglTexTarget,
                   WGL_TEXTURE_FORMAT_ARB   ,wglTexFormat,
                   0
                  };
				  
if(!s_wglExtProcs->wglCreatePbufferARB) return NULL;

EGLNativePbufferType pb = s_wglExtProcs->wglCreatePbufferARB(dpy,cfg->nativeId(),width,height,pbAttribs);

if(!pb) {
    DWORD err = GetLastError();
    return NULL;
}
//////////////////////////////////////////////////////////

Congratulations - seems like you found a bug in the emulator :-)

I would suggest taking a closer look into the emulator code.

To do things properly it should:
1. Create OpenGL context
2. Call wglGetProcAddress("wglGetExtensionsStringARB")
3. If non NULL, call the function to get a list of WGL extensions
4. Search for "WGL_ARB_render_texture" (the provider of WGL_TEXTURE_TARGET_ARB   and WGL_TEXTURE_FORMAT_ARB)
5. Act depending on its presence.

Here are a couple of links which should be useful

[1] https://www.opengl.org/wiki/Load_OpenGL_Functions#Windows_2
[2] https://www.opengl.org/registry/specs/ARB/wgl_render_texture.txt


If you want to add support for the extension in mesa that'll be great. Check the Developer info [3] page for more details.


Cheers,
Emil

[3] http://www.mesa3d.org/devinfo.html

While one's in the emulator they could also fix the strstr in wglGetExtentionsProcAddress.

Currently it will trigger whenever it finds FooBar, even if it's looking for Foo.

(In reply to Emil Velikov from comment #4)
> While one's in the emulator they could also fix the strstr in
> wglGetExtentionsProcAddress.
> 
> Currently it will trigger whenever it finds FooBar, even if it's looking for
> Foo.

Sincerely thank you for your help，

(In reply to Emil Velikov from comment #4)
> While one's in the emulator they could also fix the strstr in
> wglGetExtentionsProcAddress.
> 
> Currently it will trigger whenever it finds FooBar, even if it's looking for
> Foo.

////////////////////////////////////////

Sincerely thank you for your help.

I know what I'm going to do.

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