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Code Issues Releases Wiki Activity

Formatting, fix presumably broken markdown

Margen67
2021-04-20 14:54:06 -10:00
parent 3e5507db45
commit f4b6a575e0
1 changed files with 3 additions and 9 deletions
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6
G1-Elements-Layout.md

@@ -3,7 +3,6 @@ A G1 element is typically a sprite. It is basically an image.
There would appear to be two image formats that the G1 element can be.
## RLE Compressed G1 Element
Run length encoded element.
The first y words are offsets to the corresponding y line. You use this to jump to the correct line if you do not require info from the first line.
@@ -28,9 +27,7 @@ Example G1 Element 4x4 pixels.
0018: 0x81,0x03,0xa1 ;3 bytes in line 3
Total bytes: 27
```
Final image. Note that blank areas will be whatever the current drawing area is.
```
blank, 0xff, 0xa1, 0xff
0xff, 0xff, 0xa1, 0xff
@@ -38,13 +35,10 @@ blank, blank, blank, 0xff
blank, blank, blank, 0xa1
Total bytes of info: 32 (Assumes 1 byte for if blank or not)
```
Note that the final image has more bytes than the original image. For larger images with more blank areas this saving is bigger. We can therefore conclude that this technique was probably used to save on file size.
## Non Compressed Bitmap G1 Element
The second type is not compressed and it is a simple one to one relationship.
## Palettes
The drawing code also uses palettes to translate some of the colours. This is used for example with security guards to change their top colour. There are two palettes that are not loaded and are modified throughout the code (0x9ABE0C and 0x9ABF0C)