Question about VGA Graphics ASM

El Paisa

In the shapes, box and boxfill how I change the writing color?
The only color I got is white.

Beau Schwabe

El Paisa,

if you look at the 'color' command in the form of a BINARY number...

gr.color(i,%RRGGBBxx_RRGGBBxx)

...The upper BYTE is the foreground (pixel color), while the lower BYTE is the background.

Each RGB place holder represents two bits, resulting in a total of 4 color shades for each R, G, and B.


Example:

gr.color(i,%11000000_00000000) ' Bright Red on Black
gr.color(i,%00110000_00000000) ' Bright Green on Black
gr.color(i,%11110000_00001100) ' Bright Yellow on Blue

Note:
'i' represents the tile number

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

El Paisa

Beau,

That part understand.

What I want is able to change color to draw like lines, shapes, etc NOT tiles.

El Paisa

Looking at the VGA_graphics ASM, looks like there are not way to change colors except the tile color, right?

I would like to change writing colors to draw boxes,shapes, text, etc.

Beau Schwabe

El Paisa,

I'm not sure I understand your question. Each Tile can only support 2 colors.... a foreground color which is what you plot with lines, boxes, shapes, text, etc. and a background color.


To draw Bright Red lines, boxes, shapes, text, etc. on a Black background...
gr.color(i,%11000000_00000000) ' Bright Red on Black

To draw Bright Green lines, boxes, shapes, text, etc. on a Black background...
gr.color(i,%00110000_00000000) ' Bright Green on Black

To draw Bright Yellow lines, boxes, shapes, text, etc. on a Blue background...
gr.color(i,%11110000_00001100) ' Bright Yellow on Blue


again 'i' specifies which tile you want to configure

gr.color(i,%rrggbbxx_rrggbbxx)
            |||||||| ||||||||
            |||||||| ||||||oo-NotUsed 
            |||||||| ||||||
            |||||||| ||||oo------Blue(00,01,10,11)--background
            |||||||| |||| 
            |||||||| ||oo-------Green(00,01,10,11)--background
            |||||||| ||
            |||||||| oo-----------Red(00,01,10,11)--background
            ||||||||
            ||||||oo----------NotUsed
            ||||||
            ||||oo---------------Blue(00,01,10,11)--foreground
            ||||
            ||oo----------------Green(00,01,10,11)--foreground
            || 
            oo--------------------Red(00,01,10,11)--foreground
                                       |  |  |  |             
                                       |  |  |  High Intensity
                                       |  |  |
                                       |  |  Medium Intensity
                                       |  |
                                       |  Low Intensity
                                       |
                                       Off

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

Post Edited (Beau Schwabe (Parallax)) : 4/30/2007 8:39:53 PM GMT

El Paisa

This does not tell me how to change the foregrouind color only the background.

Beau Schwabe

El Paisa,

"This does not tell me how to change the foregrouind color only the background."

Please take a closer look, it tells you how to change both foreground colors and background colors.

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.