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Re: [pygame] font alpha

Mike Lawrence wrote:

Hi all,
Apologies for the seemingly newb help request but I can't seem to figure out how to vary the alpha value of rendered font surfaces. Here are my attempts thusfar: 

import pygame
pygame.init()
screen = pygame.display.set_mode((640,480), pygame.SRCALPHA)
screen.fill((0,0,0))

myFont = pygame.font.Font(None, 30)
nonTransparent = myFont.render("This text should be fully opaque", 1, (255,255,255)) 
screen.blit(nonTransparent, (0,0))
semiTransparent = myFont.render("This text should be somewhat transparent", 1, (255,255,255)) 
semiTransparent.set_alpha(100)
screen.blit(semiTransparent, (0,100))

pygame.display.flip()
#When I flip, both messages are the same color, indicating that the transparency on the second failed 
I don't think that fonts are rendered with surface alpha to start.
does set_alpha apply surface alpha if they don't have it already?
Maybe try convert_alpha first?
It's possible that since you're aliasing the fonts they might be using per-pixel alpha which might conflict with surface alpha. 
Just some suggestions, I've never tried this.
-Luke



--
Mike Lawrence
Graduate Student, Department of Psychology, Dalhousie University

Website: http://memetic.ca

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Err and err and err again, but less and less and less."
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