bitmap.sk_bitmap Class Reference

Inheritance diagram for bitmap.sk_bitmap:

Public Member Functions
def	__init__ (self)
def	invoke (self, arg, from_tty)

Detailed Description

Displays the content of an SkBitmap image.

Definition at line 43 of file bitmap.py.

Constructor & Destructor Documentation

__init__()

def bitmap.sk_bitmap.__init__

(

self

)

Definition at line 46 of file bitmap.py.

  def __init__(self):
      super(sk_bitmap, self).__init__('sk_bitmap',
                                      gdb.COMMAND_SUPPORT,
                                      gdb.COMPLETE_FILENAME)
 

Member Function Documentation

invoke()

def bitmap.sk_bitmap.invoke	(		self,
			arg,
			from_tty
	)

Definition at line 51 of file bitmap.py.

  def invoke(self, arg, from_tty):
    frame = gdb.selected_frame()
    val = frame.read_var(arg)
    if str(val.type.strip_typedefs()) == 'SkBitmap':
      pixmap = val['fPixmap']
      pixels = pixmap['fPixels']
      row_bytes = pixmap['fRowBytes']
      info = pixmap['fInfo']
      dimensions = info['fDimensions']
      width = dimensions['fWidth']
      height = dimensions['fHeight']
      color_type = info['fColorType']
      alpha_type = info['fAlphaType']
 
      process = gdb.selected_inferior()
      memory_data = process.read_memory(pixels, row_bytes * height)
      size = (width, height)
      image = None
      # See Unpack.c for the values understood after the "raw" parameter.
      if color_type == ColorType.bgra_8888.value:
        if alpha_type == AlphaType.unpremul.value:
          image = Image.frombytes("RGBA", size, memory_data,
                                  "raw", "BGRA", row_bytes, 1)
        elif alpha_type == AlphaType.premul.value:
          # RGBA instead of RGBa, because Image.show() doesn't work with RGBa.
          image = Image.frombytes("RGBA", size, memory_data,
                                  "raw", "BGRa", row_bytes, 1)
 
      if image:
        # Fails on premultiplied alpha, it cannot convert to RGB.
        image.show()
      else:
        print ("Need to add support for %s %s." % (
               str(ColorType(int(color_type))),
               str(AlphaType(int(alpha_type)))
        ))
 

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The documentation for this class was generated from the following file:

• third_party/skia/tools/gdb/bitmap.py