Is there Gfx interface to get screen/display size ?

[ferro]

Hi,

I cannot find API to get display height/width. Is there any ? I tried to find something like

int16_t touchgfx::HAL::GetDisplayHeight ();
int16_t touchgfx::HAL::GetDisplayWidth ();

 

In GfxDesigner I see 240x320 values:

 

In TouchGFXConfiguration.cpp there is display initialisation:

static TouchGFXHAL hal ( dma, display, tc, 240, 320 );

SimConstants.hpp contains

static unsigned short SIM_WIDTH = 240;
static unsigned short SIM_HEIGHT = 320;

 

Thanks

Ferro

 

 

[GaetanGodart]

Hello @ferro ,

 

You can use getScreenHeight() and getScreenWidth() (no need to put anything in front of those methods).
See : classtouchgfx_1_1_screen 

 

Regards,

[ferro]

Thanks @GaetanGodart ,

this is close but not enough.

>"no need to put anything in front of those methods"

This is true only when within methods of a gfx::Screen derived class or having an instance of it.

Implementation of Screen::getScreenHeight () looked promissing

however, it is a variable

So cannot be used with compile-time expressions e.g.

static constexpr int DisplayNumberOfPixels { HAL::DISPLAY_HEIGHT * HAL::DISPLAY_WIDTH };

Best,

[GaetanGodart]

Hello @ferro ,

 

So you need a define?

I have found a few defines but they seem to not be used for every project:

ft5336.h seems to be a driver or a library related to the screen used:

 

stm32746g_discovery_camera.c is clearly related to the mcu:

 

SDL_test_common.h seems the most promising but I don't know what is PSP and why it is not declared there.
Also, SDL is used for the simulator :

 

SimConstants.hpp is generated by TouchGFX and accessible "in his scope" so this might be your best bet.
Since it is a static unsigned short, can you use it in your expression?

 

The value is also available in the .ioc and .touchgfx files:

 

I hope this helps you, I am not sure what you need.

 

Regards,

[GaetanGodart]

Hello @ferro ,

 

The SimConstants.hpp file does seem to have this information.
It is just unfortunate that we don't clearly refer to a constant for the various generated functions that require the screen size.

Have you tried accessing SIM_WIDTH and height from SimConstants.hpp?
Even if this file seems to only be used for simulation, I expect it to still exist and be accessible when compiling for the target.

You have selected my last comment as best answer. Were you able to solve your problem?

 

Regards,

[ferro]

Hi @GaetanGodart 

>"The SimConstants.hpp file does seem to have this information."

Yes it does, however not marked as 'const(expr)' so cannot be used in compile-time calcs.

 

>"You have selected my last comment as best answer. Were you able to solve your problem?"

Yes, I think the answer is what I want is sth specialized and there are many places where screen size is available as you showed. I'll define my own global height&width.

Thanks for help.

[GaetanGodart]

My pleasure! :smiling_face_with_smiling_eyes: