def drawWatermarkText(writeContext, line, xOffset, yOffset, angle, opacity):
if line:
rect = CTLineGetImageBounds(line, writeContext)
imageWidth = rect.size.width
imageHeight = rect.size.height
Quartz.CGContextSaveGState(writeContext)
Quartz.CGContextSetAlpha(writeContext, opacity)
Quartz.CGContextTranslateCTM(writeContext, xOffset, yOffset)
Quartz.CGContextRotateCTM(writeContext, angle * math.pi / 180)
Quartz.CGContextSetTextPosition(writeContext, 0.0, 0.0)
CTLineDraw(line, writeContext)
Quartz.CGContextRestoreGState(writeContext)
def drawWatermarkText(ctx, line, xOffset, yOffset, angle, scale, opacity):
# CGContextRef ctx
# CTLineRef line
# float xOffset, yOffset, angle ([degree]), scale, opacity ([0.0, 1.0])
if line:
rect = CTLineGetImageBounds(line, ctx)
imageWidth = rect.size.width
imageHeight = rect.size.height
CG.CGContextSaveGState(ctx)
CG.CGContextSetAlpha(ctx, opacity)
CG.CGContextTranslateCTM(ctx, xOffset, yOffset)
CG.CGContextScaleCTM(ctx, scale, scale)
CG.CGContextTranslateCTM(ctx, imageWidth / 2, imageHeight / 2)
CG.CGContextRotateCTM(ctx, angle * math.pi / 180)
CG.CGContextTranslateCTM(ctx, -imageWidth / 2, -imageHeight / 2)
CG.CGContextSetTextPosition(ctx, 0.0, 0.0)
CTLineDraw(line, ctx)
CG.CGContextRestoreGState(ctx)
def _get_imageBounds(self):
"""Property that answers the bounding box (actual black shape) of the
text line."""
(xpt, ypt), (wpt, hpt) = CTLineGetImageBounds(self._ctLine, None)
return pt(xpt, ypt, wpt, hpt)