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https://github.com/clockworkpi/launcher_deot.git
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61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
"""
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Rounded rectangles in both non-antialiased and antialiased varieties.
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"""
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import pygame as pg
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from pygame import gfxdraw
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def round_rect(surface, rect, color, rad=20, border=0, inside=(0,0,0,0)):
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"""
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Draw a rect with rounded corners to surface. Argument rad can be specified
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to adjust curvature of edges (given in pixels). An optional border
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width can also be supplied; if not provided the rect will be filled.
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Both the color and optional interior color (the inside argument) support
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alpha.
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"""
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rect = pg.Rect(rect)
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zeroed_rect = rect.copy()
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zeroed_rect.topleft = 0,0
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image = pg.Surface(rect.size).convert_alpha()
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image.fill((0,0,0,0))
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_render_region(image, zeroed_rect, color, rad)
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if border:
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zeroed_rect.inflate_ip(-2*border, -2*border)
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_render_region(image, zeroed_rect, inside, rad)
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surface.blit(image, rect)
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def _render_region(image, rect, color, rad):
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"""Helper function for round_rect."""
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corners = rect.inflate(-2*rad, -2*rad)
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for attribute in ("topleft", "topright", "bottomleft", "bottomright"):
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pg.draw.circle(image, color, getattr(corners,attribute), rad)
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image.fill(color, rect.inflate(-2*rad,0))
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image.fill(color, rect.inflate(0,-2*rad))
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def aa_round_rect(surface, rect, color, rad=20, border=0, inside=(0,0,0)):
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"""
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Draw an antialiased rounded rect on the target surface. Alpha is not
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supported in this implementation but other than that usage is identical to
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round_rect.
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"""
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rect = pg.Rect(rect)
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_aa_render_region(surface, rect, color, rad)
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if border:
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rect.inflate_ip(-2*border, -2*border)
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_aa_render_region(surface, rect, inside, rad)
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def _aa_render_region(image, rect, color, rad):
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"""Helper function for aa_round_rect."""
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corners = rect.inflate(-2*rad-1, -2*rad-1)
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for attribute in ("topleft", "topright", "bottomleft", "bottomright"):
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x, y = getattr(corners, attribute)
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gfxdraw.aacircle(image, x, y, rad, color)
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gfxdraw.filled_circle(image, x, y, rad, color)
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image.fill(color, rect.inflate(-2*rad,0))
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image.fill(color, rect.inflate(0,-2*rad))
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