Hi,
I have one question regarding SGX530 of AM3874.
As you know SGX530 is nitegrated into AM3874. And SGX530 has 2D and 3D accelerator.
I heard that 2D and 3D accelerator does not work same time. Is it true? If it is true, please let me know the reason. If it is not true, please let me know how to use
2D and 3D same time.
I appreciate your quick reply.
Best regards,
Michi
Hi Michi,
Reading the AM387x TRM, it seems to me that we can use 2D and 3D at the same time:
1.5 SGX530 Graphics Subsystem
1.5.1 SGX Overview
The SGX graphics accelerator can simultaneously process various multimedia data types:
• Pixel data
• Vertex data
• Video data
• General-purpose processing
This is achieved through a multithreaded architecture using two levels of scheduling and data partitioning enabling zero-overhead task switching.
But searching through the E2E forum, I can find that in some cases 2D operations are not recommended to be done with SGX but in SW through the Cortex-A8 ARM Neon.
Instead of calling 2D, 3D etc, let us use OpenGL ES2 as the API as reference.
OpenGL ES can be used for 3D, as well as 2D acceleration. 2D acceleration is provided under specific conditions, and depends on framework used, size of screen, size of textures, 2D operation used and hence in some cases, SGX will not perform as well as a software implementation (done in A8+NEON). For example in Qt, refer to below link as to how SGX is used.
Unless you are implementing an OpenGL ES2 based UI, or using standard Qt with SGX backend, or Android, it does not make sense for you to use this. There is no special 2D engine or 2D API provided on SGX530.
BR
Pavel
