In this way we always have an empty tile available in the drawing
process. We've also added the Tileset::firstVisibleIndex field to
change the visible index of the tile 1 so we can offset the visible
number by the user (just as a visual aid / simulate old tilesets with
index=0=non-empty tile).
This is the first commit with a simple tilemap editor. Still buggy but
functional in several ways. Several changes were made:
* NewLayer command can receive a tilemap=true to create a new tilemap
layer
* New ToggleTilesMode command added to switch between the palette and
the tileset in the ColorBar (the ColorBar was expanded to show
colors or tilesets with a generic AbstractPaletteViewAdapter)
* All commands to create new layers were moved to Layer >
New... submenu
* There are a new tileset chunk to save tilesets in .aseprite files,
and a new kind of cels to save tilemaps
* Added doc::LayerTilemap, doc::Tileset, etc. and several other types
to handle tilesets/tilemaps in the doc layer.
* Added doc::Grid class with grid specifications that indicates how a
tilemap <-> tileset must be drawn
* Added and expanded cel operations to work with tilemaps and
conversions between regular LayerImage cels <-> LayerTilemap cels
(e.g. copy cels in the timeline between layer types)
A new Render::renderCel() method is used to render the specific cel
thumbnail, useful in the future to render thumbnails of different kind
of layers (e.g. future tilemaps). And now the background is rendered
in a different step (so the thumbnails doesn't contain the
background.)
We use the new general image composite code in case that there is a
reference layer or the background grid is so small that we need a
pixel-by-pixel color blending.
We can return the specific function to composite images depending on the
actual zoom level. In this commit I include a new
composite_image_without_scale() to completely ignore the zoom level when
it's possible.
With this patch now we can use the selection tool in locked or hidden
layers, because the selection doesn't modify the layers (only the
selection). Also we can use the selection tool on any layer and we'll
always see the feedback stroke/shape/rectangle while we're creating
the new selection.
