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context release failing

Note: This was originally posted on 1st July 2013 at http://forums.arm.com

Hello,
I'm using the latest Mali OpenGL ES 3.0 emulator under Ubuntu 12.04 32 Bit with an AMD Radeon HD 6670.
When I try to release the EGL context with this line:

eglMakeCurrent(_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

I get an EGL error 3003 (Bad Alloc).

Making the context current before was all succesful:

GraphicsWindowX11::init() - eglInitialize() succeded eglMajorVersion=1 iMinorVersion=3
GraphicsWindowX11::init() - window created =1
EGL_SAMPLE_BUFFERS: 1
EGL_SAMPLES: 8
GL renderer: [AMD Radeon HD 6670]
GL vendor:[ATI Technologies Inc.]
GL version: [4.2.12002 Compatibility Profile Context 9.012]
GL shading language version: [4.20]
GL_EXTENSIONS: GL_OES_compressed_ETC1_RGB8_texture GL_KHR_texture_compression_astc_ldr
GL_RENDERER: Mali OpenGL ES Emulator Revision r1p2-00rel0
GL_VENDOR: ARM Ltd.
GL_VERSION: OpenGL ES 3.0
GL_SHADING_LANGUAGE_VERSION: OpenGL ES GLSL ES 3.00

Kind regards,
Alexander Irion

Rhys Copeland over 12 years ago

Note: This was originally posted on 15th July 2013 at http://forums.arm.com

Hi Alexander,

Apologies for the delay. Could you let me know if this is an OpenGL ES 2.0 or 3.0 context you're creating?

Thanks!
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Alexander Irion over 12 years ago

Note: This was originally posted on 15th July 2013 at http://forums.arm.com

Hello,

EGL_CONTEXT_CLIENT_VERSION is 3 but EGL_RENDERABLE_TYPE is EGL_OPENGL_ES2_BIT, since EGL_OPENGL_ES3_BIT_KHR does not work.
As you can see at the output GL_VERSION is OpenGL ES 3.

Regards,
Alexander
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Rhys Copeland over 12 years ago

Note: This was originally posted on 15th July 2013 at http://forums.arm.com

Hi Alexander,

What do you mean when you say EGL_OPENGL_ES3_BIT_KHR doesn't work? This token should be accepted by EGL...

The problem seems to definitely be because EGL_CONTEXT_CLIENT_VERSION and EGL_RENDERABLE_TYPE are mismatched (which may well be a separate problem in our implementation, but I'd need to check further).
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Alexander Irion over 12 years ago

Note: This was originally posted on 18th July 2013 at http://forums.arm.com

When I specify EGL_RENDERABLE_TYPE as EGL_OPENGL_ES3_BIT_KHR eglChooseConfig fails with EGL_BAD_ATTRIBUTE.
--Alex
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Alexander Irion over 12 years ago

Note: This was originally posted on 18th July 2013 at http://forums.arm.com

Ah, I just read here (http://www.khronos.org/registry/egl/extensions/KHR/EGL_KHR_create_context.txt)

that EGL 1.4 is required for EGL_OPENGL_ES3_BIT_KHR, and eglInitialize says 1.3.

Maybe this could be the problem??
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