def _get_pyglet_ImageData_from_source_at_index(self, sourceRef, index):
imageRef = c_void_p(quartz.CGImageSourceCreateImageAtIndex(sourceRef, index, None))
# Regardless of the internal format of the image (L, LA, RGB, RGBA, etc)
# we just automatically convert everything to an RGBA format.
format = 'RGBA'
rgbColorSpace = c_void_p(quartz.CGColorSpaceCreateDeviceRGB())
bitsPerComponent = 8
width = quartz.CGImageGetWidth(imageRef)
height = quartz.CGImageGetHeight(imageRef)
bytesPerRow = 4 * width
# Create a buffer to store the RGBA formatted data.
bufferSize = height * bytesPerRow
buffer = (c_ubyte * bufferSize)()
# Create a bitmap context for the RGBA formatted data.
# Note that premultiplied alpha is required:
# http://developer.apple.com/library/mac/#qa/qa1037/_index.html
bitmap = c_void_p(quartz.CGBitmapContextCreate(buffer,
width, height,
bitsPerComponent,
bytesPerRow,
rgbColorSpace,
kCGImageAlphaPremultipliedLast))
# Write the image data into the bitmap.
quartz.CGContextDrawImage(bitmap, NSMakeRect(0,0,width,height), imageRef)
quartz.CGImageRelease(imageRef)
quartz.CGContextRelease(bitmap)
quartz.CGColorSpaceRelease(rgbColorSpace)
pitch = bytesPerRow
return ImageData(width, height, format, buffer, -pitch)
def get_scaling_factor(window):
from pyglet import compat_platform
if compat_platform == 'darwin':
from pyglet.libs.darwin.cocoapy import NSMakeRect
view = window.context._nscontext.view()
content_rect = NSMakeRect(0, 0, window._width,
window._height) # Get size, possibly scaled
bounds = view.convertRectFromBacking_(
content_rect) # Convert to actual pixel sizes
return int(content_rect.size.width / bounds.size.width)
else:
return 1
def get_scaling_factor(window):
"""
Tries to get the scaling factor of the given Window. Currently works
on MacOS only. Useful in figuring out what's going on with Retina and
high-res displays.
:param Window window: Handle to window we want to get scaling factor of.
:return: Scaling factor. E.g., 2 would indicate scaled up twice.
:rtype: int
"""
from pyglet import compat_platform
if compat_platform == 'darwin':
from pyglet.libs.darwin.cocoapy import NSMakeRect
view = window.context._nscontext.view()
content_rect = NSMakeRect(0, 0, window._width, window._height) # Get size, possibly scaled
bounds = view.convertRectFromBacking_(content_rect) # Convert to actual pixel sizes
return int(content_rect.size.width / bounds.size.width)
else:
return 1
