The queue grows ever large, and should shrink itself once
as the queue gets consumed. In the meantime, it seems to help.
At 3000x2000, with starters/mosaic.svg cut into four via Panels
magic tool, I get a VERY complicated drawing, which no longer
causes a crash.
(It crashed for me, even after some other improvements -- globalizing
many of the unchanging args to the recursive function, calling the
progress bar animation and sound effects calls less frequently --
helped prevent crashing for me with that starter image as-is.)
Attempt to void crashing (by blowing up the stack) when doing
a flood-fill of a complicated shape on a large canvas
(e.g., `tuxpaint --3000x2000` with `starters/mosaic.svg`).
Numerous people commented on Twitter that a piece of artwork
("Chromie Squiggle #7583", created in "ArtBlocks") looked like it
was made in Tux Paint.
However, the classic (2002-era) "Rainbow" tool cycled coarsely
through solid colors. This adds a gradient.
"TV" now breaks pixels into red/green/blue components,
rather than merely adding a 'scanline' effect.
Reworked how it handles interaction (click/drag vs fullscreen).
Unlike "directional" brushes, in which a 3x3 grid representing the
8 cardinal directions (45 degree steps) is used, only a single brush
image is required, and Tux Paint will rotate it between 0 and 360 degrees,
depending on the direction the mouse is going.
The brush's ".dat" file should contain a line consisting of the word
"rotate".
Note: This adds a dependency on "SDL_gfx" library (Homepage:
https://www.ferzkopp.net/wordpress/2016/01/02/sdl_gfx-sdl2_gfx/
SourceForge project page: https://sourceforge.net/projects/sdlgfx/)
as this feature use it's "rotozoom" functionality.
WIP -- Doesn't handle animated brushes correctly yet!
Closes https://sourceforge.net/p/tuxpaint/feature-requests/122/
Always show the appropriate instructions at the bottom when the
"Fill" (depends on which sub-tool chosen) and "Shapes" (depends
on whether "simpleshapes" option is set) tools are selected
(e.g., when returning from the "Open" dialog).
Closes https://sourceforge.net/p/tuxpaint/feature-requests/186/
