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Support loading transparent pngs without wiping out transparency

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This commit is contained in:
Kevin Lange 2017-01-17 13:45:57 +09:00
parent f42267a858
commit 8f1a5d985a
1 changed files with 13 additions and 4 deletions
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17
userspace/py/bin/painting.py
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@ -114,19 +114,28 @@ class PaintingWindow(yutani.Window):
def load_buffer(self,path):
s = cairo.ImageSurface.create_from_png(path)
self.new_buffer(s.get_width(),s.get_height())
self.init_buffer(s.get_width(),s.get_height())
self.draw_ctx.save()
self.draw_ctx.set_operator(cairo.OPERATOR_SOURCE)
self.draw_ctx.rectangle(0,0,self.surface.get_width(),self.surface.get_height())
self.draw_ctx.set_source_rgba(0,0,0,0)
self.draw_ctx.fill()
self.draw_ctx.restore()
self.draw_ctx.set_source_surface(s,0,0)
self.draw_ctx.paint()
def new_buffer(self,w,h):
def init_buffer(self,w,h):
self.buf = yutani.GraphicsBuffer(w,h)
self.surface = self.buf.get_cairo_surface()
self.draw_ctx = cairo.Context(self.surface)
self.offset_x = int((self.width-self.decorator.width()-self.buf.width)/2)
self.offset_y = int((self.height-self.decorator.height()-self.buf.height-self.menubar.height)/2)
def new_buffer(self,w,h):
self.init_buffer(w,h)
self.draw_ctx.rectangle(0,0,self.surface.get_width(),self.surface.get_height())
self.draw_ctx.set_source_rgb(1,1,1)
self.draw_ctx.fill()
self.offset_x = int((self.width-self.decorator.width()-self.buf.width)/2)
self.offset_y = int((self.height-self.decorator.height()-self.buf.height-self.menubar.height)/2)
def color(self):
if self.picker: