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fxconv: expose Area and Grid in the API

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Lephenixnoir 2020-05-31 09:00:16 +02:00
parent f11f6929b4
commit 822b5107e5
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1 changed files with 22 additions and 6 deletions
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28
fxconv/fxconv.py
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@ -13,6 +13,8 @@ __all__ = [
"FX_BLACK", "FX_DARK", "FX_LIGHT", "FX_WHITE", "FX_ALPHA",
# Functions
"quantize", "convert", "elf",
# Reusable classes
"Area", "Grid",
]
#
@ -150,16 +152,21 @@ FX_CHARSETS = [
#
class Area:
"""
A subrectangle of an image, typicall used for pre-conversion cropping.
"""
def __init__(self, area, img):
"""
Construct an Area object from a dict specification. The following keys
may be used:
may be used to specific the position and size of the rectangle:
* "x", "y" (int strings, default to 0)
* "width", "height" (int strings, default to image dimensions)
* "size" ("WxH" where W and H are the width and height)
The Area objects has attributes "x", "y", "w" and "h".
The Area objects has attributes "x", "y", "w" and "h". Both positions
default to 0 and both sizes to the corresponding image dimensions.
"""
self.x = int(area.get("x", 0))
@ -171,7 +178,7 @@ class Area:
self.w, self.h = map(int, area["size"].split("x"))
def tuple(self):
"""Return the tuple representation (x,y,w,h)."""
"""Return the tuple representation (x,y,w,h), suitable for .crop(). """
return (self.x, self.y, self.w, self.h)
#
@ -179,17 +186,26 @@ class Area:
#
class Grid:
"""
A grid over an image, used to isolate glyphs in fonts and tiles in maps.
Supports several types of spacing. To apply an outer border, use crop
through an Area before using the Grid.
"""
def __init__(self, grid):
"""
Construct a Grid object from a dict specification. The following keys
may be used:
may be used to specify the dimension and spacing of the cells:
* "border" (int string, defaults to 0)
* "padding" (int string, defaults to 0)
* "width", "height" (int strings, mandatory if "size" not set)
* "size" ("WxH" where W and H are the cell width/height)
The Grid object has attributes "border", "padding", "w" and "h".
The Grid object has attributes "border", "padding", "w" and "h". Each
cell is of size "(w,h)" and has "padding" pixels of proper padding
around it. Additionally, cells are separated by a border of size
"border"; this includes an outer border.
"""
self.border = int(grid.get("border", 0))
@ -218,7 +234,7 @@ class Grid:
def iter(self, img):
"""Build an iterator on all subrectangles of the grid."""
"""Yields subrectangles of the grid as tuples (x,y,w,h)."""
b, p, w, h = self.border, self.padding, self.w, self.h
# Padding-extended parameters