Graphics Composer and the Display Modules

[4dTechSupport]

This section of FAQ for "Graphics Composer and the Display Modules" covers all the frequently asked questions related to Graphics Composer and

1. PICASO-GFX2 processor (and related Display Modules)
2. GOLDELOX-GFX2 processor (and related Display Modules)
3. PICASO-SGC processor (and related Display Modules)
4. GOLDELOX-SGC processor (and related Display Modules)

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Q01. Which image file formats are supported by the Graphics Composer?

Ans. Following image file formats are supported,

-jpg
-bmp
-gif
-ico
-wmf
-png

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Q02. Which video file formats are supported by the Graphics Composer?

Ans. Following video file formats are supported,

-wmv
-avi
-vob
-mpg

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Q03. What is the format of an image written to the uSD card through the Graphics Composer?

Ans. The image format is as follows,

Header (6 bytes as 3 words)
word1 (Hi:Lo) = width : horizontal size of the image
word2 (Hi:Lo) = height : vertical size of the image
Word3 = colour_mode : 16dec = 65K colour mode, 16bits/2bytes per pixel (msb, lsb)

The header is then followed by the pixel data
Pixel1…PixelN: Image pixel data and N is the total number of pixels
N = height x width when colour_mode = 0
N = height x width x 2 when colour_mode = 1

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Q04. What is the format of a video written to the uSD card through the Graphics Composer?

Ans. The video format is as follows,

Header (8 bytes as 4 words)
word1 (Hi:Lo) = width : horizontal size of the image
word2 (Hi:Lo) = height : vertical size of the image
Byte5 = colour_mode : 16dec = 65K colour mode, 16bits/2bytes per pixel (msb, lsb)
Byte6 = If frame delay is 0 it’s just an image not a movie.
word4 (Hi:Lo) = No. of frames, only present if it’s video.

The header is then followed by the pixel data,

Pixel1…PixelN: 1st Frame pixel data and N is the total number of pixels
N = height x width when colour_mode = 0
N = height x width x 2 when colour_mode = 1
Pixel1…PixelN: 2nd Frame pixel data and N is the total number of pixels
N = height x width when colour_mode = 0
N = height x width x 2 when colour_mode = 1
Pixel1…PixelN: Last Frame pixel data and N is the total number of pixels
N = height x width when colour_mode = 0
N = height x width x 2 when colour_mode = 1

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Q05. Can I use 8bit Colour mode for images/videos in the Graphics Composer?

Ans. No, you cannot use 8bit Colour mode. It's not supported by GOLDELOX-SGC, GOLDELOX-GFX2, PICASO-SGC and PICASO-GFX2 processors.

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Q06. I have partitioned a uSD card in to FAT and nonFAT (Raw). I am using "4DGL, SGC Picaso - uSD Raw - GCI at Specified Offset" Build Type. What should I set the Sector Offset to?

Ans. If you are using a partitioned uSD card (FAT and nonFAT), the Graphics Composer will write the images/videos to the Raw area with the "4DGL, SGC Picaso - uSD Raw - GCI at Specified Offset" Build Type. Sector offset is from the start of existing Raw partition.

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Q07. I have partitioned a uSD card in to FAT and nonFAT (Raw). I am using "uSD Raw" Build Type. What should I set the Sector Offset to?

Ans. If you are using a partitioned uSD card (FAT and nonFAT), the Graphics Composer will write the images/videos to the Raw area with the "uSD Raw" Build Type. Sector offset is from the start of existing Raw partition.