Noah Petherbridge
5654145fd8
Finally add a second option for Chunk MapAccessor implementation besides the
MapAccessor. The RLEAccessor is basically a MapAccessor that will compress
your drawing with Run Length Encoding (RLE) in the on-disk format in the ZIP
file.
This slashes the file sizes of most levels:
* Shapeshifter: 21.8 MB -> 8.1 MB
* Jungle: 10.4 MB -> 4.1 MB
* Zoo: 2.8 MB -> 1.3 MB
Implementation details:
* The RLE binary format for Chunks is a stream of Uvarint pairs storing the
palette index number and the number of pixels to repeat it (along the Y,X
axis of the chunk).
* Null colors are represented by a Uvarint that decodes to 0xFFFF
or 65535 in decimal.
* Gameplay logic currently limits maps to 256 colors.
* The default for newly created chunks in-game will be RLE by default.
* Its in-memory representation is still a MapAccessor (a map of absolute
world coordinates to palette index).
* The game can still open and play legacy MapAccessor maps.
* On save in the editor, the game will upgrade/convert MapAccessor chunks over
to RLEAccessors, improving on your level's file size with a simple re-save.
Current Bugs
* On every re-save to RLE, one pixel is lost in the bottom-right corner of
each chunk. Each subsequent re-save loses one more pixel to the left, so what
starts as a single pixel per chunk slowly evolves into a horizontal line.
* Some pixels smear vertically as well.
* Off-by-negative-one errors when some chunks Iter() their pixels but compute
a relative coordinate of (-1,0)! Some mismatch between the stored world coords
of a pixel inside the chunk vs. the chunk's assigned coordinate by the Chunker:
certain combinations of chunk coord/abs coord.
To Do
* The `doodad touch` command should re-save existing levels to upgrade them.
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| .. | ||
| boolprops.go | ||
| cheats.go | ||
| debug.go | ||
| feature_flags.go | ||
| fonts.go | ||
| numbers.go | ||
| README.md | ||
| responsive.go | ||
| runtime.go | ||
| shell.go | ||
| tag_dpp.go | ||
| tag_foss.go | ||
| theme.go | ||
| workarounds.go | ||
balance
Constants and settings for the Doodle app.
Environment Variables
Some runtime settings can be configured in the environment. Here they are with their default values.
Most colors work with alpha channels; just provide an 8 hex character code,
like #FF00FF99 for 153 ($99) on the alpha channel.
- Application Windw Size (ints):
DOODLE_W=1024DOODLE_H=768
- Shell settings:
D_SHELL_BG=#001428C8: shell background color.D_SHELL_FG=#0099FF: shell text color.D_SHELL_PC=#FFFFFF: shell prompt color.D_SHELL_LN=8: shell history line count (how tall the shell is in lines)D_SHELL_FS=16: font size for both the shell and on-screen flashed messages.
- Debug Colors and Hitboxes (default invisible=off):
DOODLE_DEBUG_ALL=false: turn on all debug colors and hitboxes to their default colors and settings.DEBUG_CHUNK_COLOR=#FFFFFF: background color when caching a chunk to bitmap. Helps visualize where the chunks and caching are happening.DEBUG_CANVAS_BORDER: draw a border color around every uix.Canvas widget. This effectively draws the bounds of every Doodad drawn on top of a level or inside a button and the bounds of the level space itself.DEBUG_CANVAS_LABEL=false: draw a label in the corner of every Canvas with details about the Canvas.
- Tuning constants (may not be available in production builds):
D_SCROLL_SPEED=8: Canvas scroll speed when using the keyboard arrows in the Editor Mode, in pixels per tick.D_DOODAD_SIZE=100: Default size when creating a new Doodad.
Development booleans for unit tests (set to any non-empty value):
T_WALLPAPER_PNGfor pkg/wallpaper to output PNG images.