Bug report from Codex on forum (https://forum.lookingglassfactory.com/t/opengl-beta-release-working-fine/1450)

[alxdncn]

I’ve looked at the opengl code for 1 day now, and can now report that the software is working properly.

I got the following setup to work properly:

1 )5*9 fbo’s with size 815x455, window setup to 2560x1600 (hires mode)
2) rendering using glViewport to the fbo’s with only translating x-direction
3) GL_BLEND disabled on calls to hp_copyViewToQuilt(i) and hp_drawLightfield()
4) it actually requires HP_LOAD_LIBRARY or else there will be compability problems with vc++'s and mingw’s dll linking.

The following stuff didn’t work:

a) MakeCurrent and separate opengl context for the window
b) clearing the screen required the GL_BLEND disable-solution above
c) hp_customquiltsettings is not working, it’s always in hires mode
d) HP_LOAD_LIBRARY is breaking hp_quiltTexture. Need to use hp_copyViewToQuilt(i) instead.

[CharlieD111]

Instead of hp_quiltTexture as above I used the following to load a hires quilt read from a 32bit png and did this
`
//
// bind and load imgdata (from 32bit png) into gl texture
// imgx and imgy come from stbi_load(...)
glTexImage2D(
GL_TEXTURE_2D, 0, GL_RGBA, imgx, imgy,
0, GL_RGBA, GL_UNSIGNED_BYTE, imgdata
);
//copy to quilt
hp_copyViewToQuilt(0); // start from bottom left fills quilt in one call

// free image data
stbi_image_free(imgdata);
`
Shows black screen, no runtime error
Ideas ? Thanks.