Image takes up a lot of FLASH space

[MMerc.1]

Hi,

I want to use an image but it takes up a lot of space in FLASH memory when I add it.

Example:

Image size ------ (no image) ---- 7.55 KB -------- 2.38 KB (same picture but compressed)

FLASH (free) ---- 811.97KB ----- 385.55 KB ----- 385.55 KB

(Instead of) -------------------------- 804.42 KB ----- 809.59 KB

I don't understand why...

Do you have the same problem?

Best Regards

[Ozone]

Check the linker-generated map file.

[MMerc.1]

Where is this file?

Could you explain me?

[MMerc.1]

UP ! :smirking_face:

[Ozone]

Read the documentation/tutorials of your unnamed toolchain.

Map file generation is an optional linker feature. Often set (enabled) with the project setting.

Know your tools.

[Martin KJELDSEN]

Did you do what @Ozone​ asked you to do? Find your map file and check the size of the object for that image. Or just post it here and we can tell you.

Images contain pixels and depending on the quality of your image, the image will take up a pre-defined amount of space in flash. It's unrelated to TouchGFX. We simply read the image and write the value for each pixel.

/Martin

[MMerc.1]

Hi,

Here is the map file :

"FLASH";"0x08000000";"";"1024 KB"

".isr_vector";"0x08000000";"0x08000000";"456 B"

".text";"0x080001d0";"0x080001d0";"131,02 KB"

".rodata";"0x08020de4";"0x08020de4";"14,42 KB"

"FontFlashSection";"0x08024794";"0x08024794";"2,24 KB"

"ExtFlashSection";"0x0802508c";"0x0802508c";"518,43 KB"

"_bassin";"0x0802508c";"0x0802508c";"177,25 KB"

"_bidon_base";"0x08051588";"0x08051588";"4,6 KB"

"_bonde_fond";"0x080527f0";"0x080527f0";"2,64 KB"

"_bouton_retour";"0x08053280";"0x08053280";"21,97 KB"

"_filtre";"0x08058a64";"0x08058a64";"94,06 KB"

"_helice";"0x080702a4";"0x080702a4";"33,79 KB"

"_pac_inactif";"0x080789c8";"0x080789c8";"77,44 KB"

"_pompe_filtration_inactif";"0x0808bf88";"0x0808bf88";"53,16 KB"

"_pomperegulation_inactif";"0x08099428";"0x08099428";"12,63 KB"

"_refoulements";"0x0809c6ac";"0x0809c6ac";"2,52 KB"

"_sonde_inactif";"0x0809d0bc";"0x0809d0bc";"3,39 KB"

"_tuyau_3_12_inactif";"0x0809de48";"0x0809de48";"2,64 KB"

"_tuyau_3_6_12_inactif";"0x0809e8d8";"0x0809e8d8";"3,66 KB"

"_tuyau_3_6_9_12_inactif";"0x0809f778";"0x0809f778";"5,06 KB"

"_tuyau_3_6_9_inactif";"0x080a0bb8";"0x080a0bb8";"3,66 KB"

"_tuyau_3_6_inactif";"0x080a1a58";"0x080a1a58";"2,64 KB"

"_tuyau_3_9_12_inactif";"0x080a24e8";"0x080a24e8";"3,66 KB"

"_tuyau_6_9_12_inactif";"0x080a3388";"0x080a3388";"3,66 KB"

"_tuyau_6_9_inactif";"0x080a4228";"0x080a4228";"2,64 KB"

"_tuyau_9_12_inactif";"0x080a4cb8";"0x080a4cb8";"2,64 KB"

"_tuyau_horizontal_inactif";"0x080a5748";"0x080a5748";"588 B"

"_tuyau_vertical_inactif";"0x080a5994";"0x080a5994";"588 B"

"_vanne_horizontal_actif";"0x080a5be0";"0x080a5be0";"1,8 KB"

"_vanne_vertical_actif";"0x080a6310";"0x080a6310";"1,8 KB"

"TextFlashSection";"0x080a6a40";"0x080a6a40";"164 B"

".ARM";"0x080a6ae4";"0x080a6ae4";"8 B"

".preinit_array";"0x080a6aec";"0x080a6aec";"0 B"

".init_array";"0x080a6aec";"0x080a6aec";"20 B"

".fini_array";"0x080a6b00";"0x080a6b00";"8 B"

".data";"0x20000000";"0x080a6b08";"268 B"

"RAM";"0x20000000";"";"320 KB"

".data";"0x20000000";"0x080a6b08";"268 B"

".bss";"0x2000010c";"";"42,65 KB"

"._user_heap_stack";"0x2000aba4";"";"1,5 KB"

The size of the "_bassin" file is 177,25 KB but on my computer it is 26,5 Ko...

The problem is the same for all files.

[MMerc.1]

HI,

I have attached an image file. The size of this image is 157,8KB in the linker (Build Analyzer - Memory Details - FLASH - ExtFlashSection) but the size is 4.46KB on my computer.

Could you explain to me how can I have the same size between flash memory and my computer?

[chaaalyy]

203x199 Pixels with 24 bit/Pixel + Alpha = how many Bytes ? ... Images in TouchGFX are not compressed, they are just simple Bitmap Arrays ;) Maybe there´s a way to use some kind of JPEG-compression, but i fear, this will have heavy impact on performance ...

[MMerc.1]

Hi chaaalyy,

Thank you for your advice.

I created another subject where I want to use a µSD to store all my images : https://community.st.com/s/feed/0D50X0000CAuoHJ

Do you have any ideas ?