Matrix Orbital GLK19264A-7T-1U - Manual (Page 35)

30 Command Summary
Bitmap File Creation
In addition to fonts, Matrix Orbital graphic displays can also hold a number of customizable bitmaps to
provide further stylistic product integration. Like font files, bitmaps files are most easily uploaded to a
display using MOGD#. However, the critical data component of the bitmap upload command is detailed
below for reference.
The bitmap data block is similar to that of a font. However, as a bitmap is a single glyph, only a simple
two byte header is required. First, one byte representing the bitmap width is sent, then one byte for the
height. Each bitmap is merely encoded in binary fashion using a series of ones and zeroes. Again a grid
can be created using the width and height specified in the upload command, populated in the manner
above, and converted into byte values. A smiley face example is shown below to indicate the ultimate
affect of the Matrix Orbital graphic stylization ability.
Table 24: Smiley Face Bitmap
0 1 0 1 0
0 0 0 0 0
1 0 0 0 1
0 1 1 1 0
Table 25:Smiley Face Data
0 1 0 1 0 0 0 0 50 80
0 0 1 0 0 0 1 0 22 34
1 1 1 0 0 0 0 0 E0 224
Table 26: Example Bitmap File
Header 5 4
Bitmap Data 80 34 224
Bitmap Masking
Like a regular bitmap, a mask can be loaded to the display and used to create a more polished result
when drawing in populated areas. When defining a mask, all active values will clear any background
information, while any inactive values will leave it untouched. This is best described with an example.
Figure 17: Drawing without a Mask Figure 18: Drawing with a Mask