ProjektAI/kelner/venv/Lib/site-packages/pygame/_numpysurfarray.py
2020-03-22 02:01:57 +01:00

357 lines
13 KiB
Python

## pygame - Python Game Library
## Copyright (C) 2007 Marcus von Appen
##
## This library is free software; you can redistribute it and/or
## modify it under the terms of the GNU Library General Public
## License as published by the Free Software Foundation; either
## version 2 of the License, or (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## Library General Public License for more details.
##
## You should have received a copy of the GNU Library General Public
## License along with this library; if not, write to the Free
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
## Marcus von Appen
## mva@sysfault.org
"""pygame module for accessing surface pixel data using numpy
Functions to convert pixel data between pygame Surfaces and Numpy
arrays. This module will only be available when pygame can use the
external Numpy package.
Note, that numpyarray is an optional module. It requires that Numpy is
installed to be used. If not installed, an exception will be raised when
it is used. eg. ImportError: no module named numpy
Every pixel is stored as a single integer value to represent the red,
green, and blue colors. The 8bit images use a value that looks into a
colormap. Pixels with higher depth use a bit packing process to place
three or four values into a single number.
The Numpy arrays are indexed by the X axis first, followed by the Y
axis. Arrays that treat the pixels as a single integer are referred to
as 2D arrays. This module can also separate the red, green, and blue
color values into separate indices. These types of arrays are referred
to as 3D arrays, and the last index is 0 for red, 1 for green, and 2 for
blue.
In contrast to Numeric Numpy does use unsigned 16bit integers, images
with 16bit data will be treated as unsigned integers.
"""
import pygame
from pygame.compat import bytes_
from pygame.pixelcopy import array_to_surface, surface_to_array, \
map_array as pix_map_array, make_surface as pix_make_surface
import numpy
from numpy import array as numpy_array, empty as numpy_empty, \
around as numpy_around, uint32 as numpy_uint32, \
ndarray as numpy_ndarray
#float96 not available on all numpy versions.
numpy_floats = []
for type_name in "float float32 float64 float96".split():
if hasattr(numpy, type_name):
numpy_floats.append(getattr(numpy, type_name))
# Pixel sizes corresponding to NumPy supported integer sizes, and therefore
# permissible for 2D reference arrays.
_pixel2d_bitdepths = set([8, 16, 32])
def blit_array (surface, array):
"""pygame.surfarray.blit_array(Surface, array): return None
Blit directly from a array values.
Directly copy values from an array into a Surface. This is faster than
converting the array into a Surface and blitting. The array must be the
same dimensions as the Surface and will completely replace all pixel
values. Only integer, ascii character and record arrays are accepted.
This function will temporarily lock the Surface as the new values are
copied.
"""
if isinstance(array, numpy_ndarray) and array.dtype in numpy_floats:
array = array.round(0).astype(numpy_uint32)
return array_to_surface(surface, array)
def make_surface(array):
"""pygame.surfarray.make_surface (array): return Surface
Copy an array to a new surface.
Create a new Surface that best resembles the data and format on the
array. The array can be 2D or 3D with any sized integer values.
"""
if isinstance(array, numpy_ndarray) and array.dtype in numpy_floats:
array = array.round(0).astype(numpy_uint32)
return pix_make_surface (array)
def array2d(surface):
"""pygame.numpyarray.array2d(Surface): return array
copy pixels into a 2d array
Copy the pixels from a Surface into a 2D array. The bit depth of the
surface will control the size of the integer values, and will work
for any type of pixel format.
This function will temporarily lock the Surface as pixels are copied
(see the Surface.lock - lock the Surface memory for pixel access
method).
"""
bpp = surface.get_bytesize()
try:
dtype = (numpy.uint8, numpy.uint16, numpy.int32, numpy.int32)[bpp - 1]
except IndexError:
raise ValueError("unsupported bit depth %i for 2D array" % (bpp * 8,))
size = surface.get_size()
array = numpy.empty(size, dtype)
surface_to_array(array, surface)
return array
def pixels2d(surface):
"""pygame.numpyarray.pixels2d(Surface): return array
reference pixels into a 2d array
Create a new 2D array that directly references the pixel values in a
Surface. Any changes to the array will affect the pixels in the
Surface. This is a fast operation since no data is copied.
Pixels from a 24-bit Surface cannot be referenced, but all other
Surface bit depths can.
The Surface this references will remain locked for the lifetime of
the array (see the Surface.lock - lock the Surface memory for pixel
access method).
"""
if (surface.get_bitsize() not in _pixel2d_bitdepths):
raise ValueError("unsupport bit depth for 2D reference array")
try:
return numpy_array(surface.get_view('2'), copy=False)
except (ValueError, TypeError):
raise ValueError("bit depth %i unsupported for 2D reference array" %
(surface.get_bitsize(),))
def array3d(surface):
"""pygame.numpyarray.array3d(Surface): return array
copy pixels into a 3d array
Copy the pixels from a Surface into a 3D array. The bit depth of the
surface will control the size of the integer values, and will work
for any type of pixel format.
This function will temporarily lock the Surface as pixels are copied
(see the Surface.lock - lock the Surface memory for pixel access
method).
"""
w, h = surface.get_size()
array = numpy.empty((w, h, 3), numpy.uint8)
surface_to_array(array, surface)
return array
def pixels3d (surface):
"""pygame.numpyarray.pixels3d(Surface): return array
reference pixels into a 3d array
Create a new 3D array that directly references the pixel values in a
Surface. Any changes to the array will affect the pixels in the
Surface. This is a fast operation since no data is copied.
This will only work on Surfaces that have 24-bit or 32-bit
formats. Lower pixel formats cannot be referenced.
The Surface this references will remain locked for the lifetime of
the array (see the Surface.lock - lock the Surface memory for pixel
access method).
"""
return numpy_array(surface.get_view('3'), copy=False)
def array_alpha(surface):
"""pygame.numpyarray.array_alpha(Surface): return array
copy pixel alphas into a 2d array
Copy the pixel alpha values (degree of transparency) from a Surface
into a 2D array. This will work for any type of Surface
format. Surfaces without a pixel alpha will return an array with all
opaque values.
This function will temporarily lock the Surface as pixels are copied
(see the Surface.lock - lock the Surface memory for pixel access
method).
"""
size = surface.get_size()
array = numpy.empty(size, numpy.uint8)
surface_to_array(array, surface, 'A')
return array
def pixels_alpha(surface):
"""pygame.numpyarray.pixels_alpha(Surface): return array
reference pixel alphas into a 2d array
Create a new 2D array that directly references the alpha values
(degree of transparency) in a Surface. Any changes to the array will
affect the pixels in the Surface. This is a fast operation since no
data is copied.
This can only work on 32-bit Surfaces with a per-pixel alpha value.
The Surface this array references will remain locked for the
lifetime of the array.
"""
return numpy.array(surface.get_view('A'), copy=False)
def pixels_red(surface):
"""pygame.surfarray.pixels_red(Surface): return array
Reference pixel red into a 2d array.
Create a new 2D array that directly references the red values
in a Surface. Any changes to the array will affect the pixels
in the Surface. This is a fast operation since no data is copied.
This can only work on 24-bit or 32-bit Surfaces.
The Surface this array references will remain locked for the
lifetime of the array.
"""
return numpy.array(surface.get_view('R'), copy=False)
def array_red(surface):
"""pygame.numpyarray.array_red(Surface): return array
copy pixel red into a 2d array
Copy the pixel red values from a Surface into a 2D array. This will work
for any type of Surface format.
This function will temporarily lock the Surface as pixels are copied
(see the Surface.lock - lock the Surface memory for pixel access
method).
"""
size = surface.get_size()
array = numpy.empty(size, numpy.uint8)
surface_to_array(array, surface, 'R')
return array
def pixels_green(surface):
"""pygame.surfarray.pixels_green(Surface): return array
Reference pixel green into a 2d array.
Create a new 2D array that directly references the green values
in a Surface. Any changes to the array will affect the pixels
in the Surface. This is a fast operation since no data is copied.
This can only work on 24-bit or 32-bit Surfaces.
The Surface this array references will remain locked for the
lifetime of the array.
"""
return numpy.array(surface.get_view('G'), copy=False)
def array_green(surface):
"""pygame.numpyarray.array_green(Surface): return array
copy pixel green into a 2d array
Copy the pixel green values from a Surface into a 2D array. This will work
for any type of Surface format.
This function will temporarily lock the Surface as pixels are copied
(see the Surface.lock - lock the Surface memory for pixel access
method).
"""
size = surface.get_size()
array = numpy.empty(size, numpy.uint8)
surface_to_array(array, surface, 'G')
return array
def pixels_blue (surface):
"""pygame.surfarray.pixels_blue(Surface): return array
Reference pixel blue into a 2d array.
Create a new 2D array that directly references the blue values
in a Surface. Any changes to the array will affect the pixels
in the Surface. This is a fast operation since no data is copied.
This can only work on 24-bit or 32-bit Surfaces.
The Surface this array references will remain locked for the
lifetime of the array.
"""
return numpy.array(surface.get_view('B'), copy=False)
def array_blue(surface):
"""pygame.numpyarray.array_blue(Surface): return array
copy pixel blue into a 2d array
Copy the pixel blue values from a Surface into a 2D array. This will work
for any type of Surface format.
This function will temporarily lock the Surface as pixels are copied
(see the Surface.lock - lock the Surface memory for pixel access
method).
"""
size = surface.get_size()
array = numpy.empty(size, numpy.uint8)
surface_to_array(array, surface, 'B')
return array
def array_colorkey(surface):
"""pygame.numpyarray.array_colorkey(Surface): return array
copy the colorkey values into a 2d array
Create a new array with the colorkey transparency value from each
pixel. If the pixel matches the colorkey it will be fully
tranparent; otherwise it will be fully opaque.
This will work on any type of Surface format. If the image has no
colorkey a solid opaque array will be returned.
This function will temporarily lock the Surface as pixels are
copied.
"""
size = surface.get_size()
array = numpy.empty(size, numpy.uint8)
surface_to_array(array, surface, 'C')
return array
def map_array(surface, array):
"""pygame.numpyarray.map_array(Surface, array3d): return array2d
map a 3d array into a 2d array
Convert a 3D array into a 2D array. This will use the given Surface
format to control the conversion.
Note: arrays do not need to be 3D, as long as the minor axis has
three elements giving the component colours, any array shape can be
used (for example, a single colour can be mapped, or an array of
colours). The array shape is limited to eleven dimensions maximum,
including the three element minor axis.
"""
if array.ndim == 0:
raise ValueError("array must have at least 1 dimension")
shape = array.shape
if shape[-1] != 3:
raise ValueError("array must be a 3d array of 3-value color data")
target = numpy_empty(shape[:-1], numpy.int32)
pix_map_array(target, array, surface)
return target