Why Does My PNG with Transparency Appear Black in Pygame?

How to Blit a PNG with Transparency in Pygame

When attempting to incorporate a PNG image with transparency into a surface, the transparent area may appear black instead of transparent. Here's a common code snippet that demonstrates this issue:

<code class="python">screen = pygame.display.set_mode((800, 600), pygame.DOUBLEBUF, 32)

world = pygame.Surface((800, 600), pygame.SRCALPHA, 32)
treeImage = pygame.image.load("tree.png")

world.blit(treeImage, (0, 0), (0, 0, 64, 64))
screen.blit(world, pygame.rect.Rect(0, 0, 800, 600))</code>

To resolve this issue, it's crucial to enable alpha transparency for the PNG image using the convert_alpha() method:

<code class="python">treeImage = pygame.image.load("tree.png").convert_alpha()</code>

Pygame's documentation (http://www.pygame.org/docs/ref/image.html) specifically advises:

"For alpha transparency, like in .png images use the convert_alpha() method after loading so that the image has per pixel transparency."

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