OpenGL ES 2.0 glTexImage2D on am572x is very slow

Apoorva Nagarajan

Hi,

I am using PSDK 2.0.0.0 and my target platform is am572x. I observe that glTexImage2D is very slow (takes approx 390ms for a 1920x1080 image) . In contrast, I see that loading the image using the KHR_image extensions (eglCreateImageKHR and glEGLImageTargetTexture2DOES) takes less than 1ms. According to my understanding, the KHR_image extensions support YUYV, NV12, YV12 and I420 formats. How do a I load an RGB image in real time?

Regards,

Apoorva

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

I will forward this to the software team.

0 Biser Gatchev-XID over 9 years ago in reply to Biser Gatchev-XID

TI__Guru**** 393215 points

Please post which SDK is this - Linux or RTOS.

0 Apoorva Nagarajan over 9 years ago in reply to Biser Gatchev-XID

Intellectual 505 points

I am using the Linux SDK

Regards,
Apoorva

0 Anand Balagopalakrishnan over 9 years ago in reply to Apoorva Nagarajan

TI__Expert 5130 points

Traditionally, glTexImage2D is expected to be slow. This involves a copy of memory from MPU space to GPU space. On the other hand, EGLImage, by design, is meant to be used for texture streaming use cases.

Does your application require texture streaming?

Regards,

Anand

0 Apoorva Nagarajan over 9 years ago in reply to Anand Balagopalakrishnan

Intellectual 505 points

Yes my application involves texture streaming. Is it not possible to load an RGB image in real time?

Regards,
Apoorva

0 Apoorva Nagarajan over 9 years ago in reply to Apoorva Nagarajan

Intellectual 505 points

Hi,

I had another question regarding EGLImage. I understand that by using EGL image, openGL internally converts YUV to RGB. Who allocates the memory to store the converted RGB image and from which part of memory does this get allocated from?

Regards,
Apoorva

0 Anand Balagopalakrishnan over 9 years ago in reply to Apoorva Nagarajan

TI__Expert 5130 points

Hi,
The OpenGLES stack has specific heaps in DDR for storing internal memory such as color buffer, depth buffer, stencil buffer, mip maps etc. The intermediate RGB buffer will be stored in this area. These are internal to SGX and driver and are not visible to application layer.

Regards,
Anand