杂乱的演员内容不会像它应该的那样融合

时间:2014-03-24 15:51:55

标签: python opacity clutter gdkpixbuf

由于ClutterTexture现在被标记为已弃用,我按照建议将其替换为ClutterActor,将其内容设置为pixbuf。

from gi.repository import Clutter, GdkPixbuf, Cogl

Clutter.init([])
stage = Clutter.Stage()
stage.set_size(600, 300)

# old style
texture_actor = Clutter.Texture(filename='icon_big_a.png')
texture_actor.set_opacity(127)
stage.add_child(texture_actor)

# replacement because ClutterTexture is deprecated
pixbuf = GdkPixbuf.Pixbuf.new_from_file('icon_big_b.png')
pixel_format = Cogl.PixelFormat.RGBA_8888 if pixbuf.get_has_alpha() \
    else Cogl.PixelFormat.RGB_888

image = Clutter.Image()
image.set_data(
    pixbuf.get_pixels(),
    pixel_format,
    pixbuf.get_width(),
    pixbuf.get_height(),
    pixbuf.get_rowstride(),
)

image_actor = Clutter.Actor()
image_actor.set_content_scaling_filters(
    Clutter.ScalingFilter.TRILINEAR,
    Clutter.ScalingFilter.LINEAR
)
image_actor.set_content(image)
image_actor.set_size(pixbuf.get_width(), pixbuf.get_height())
image_actor.set_opacity(127)
image_actor.move_by(300, 0)
stage.add_child(image_actor)

stage.show()
Clutter.main()

一切正常但是当我将actor的不透明度改为127时,即使背景为白色也会使背景变暗。

Here is a git repo with code and screenshot of the problem

当我将不透明度设置为255时,一切看起来都应该是白色。

1 个答案:

答案 0 :(得分:1)

您需要将您的Clutter版本更新为大于或等于1.16.2的版本(最新的1.16版本为1.16.4)。 ClutterImage中有一个错误导致混合颜色被不必要地预乘:

https://git.gnome.org/browse/clutter/commit/?h=clutter-1.16&id=32ccff85254f731cef6dab88d302eb3dcba93887