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[DEBUG] MacOs image resize error & add pow2 scale limitation

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This commit is contained in:
Edouard DUPIN 2014-05-08 09:56:21 +02:00
parent eb447c39c5
commit ed9f3f2675
1 changed files with 17 additions and 8 deletions
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25
lutinImage.py
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@ -7,26 +7,34 @@ if platform.system() == "Darwin":
import CoreGraphics
else:
from PIL import Image
def get_pow_2_multiple(size):
base = 2
while size>base:
base = base * 2
return base
def resize(srcFile, destFile, x, y):
x = get_pow_2_multiple(x)
extension = destFile[destFile.rfind('.'):]
if platform.system() == "Darwin":
source_image = CoreGraphics.CGImageImport(CoreGraphics.CGDataProviderCreateWithFilename(srcFile))
source_width = source_image.getWidth()
source_height = source_image.getHeight()
source_image_rect = CoreGraphics.CGRectMake(0, 0, source_width, source_height)
new_image = source_image.createWithImageInRect(source_image_rect)
colors_space = CoreGraphics.CGColorSpaceCreateDeviceRGB()
colors = CoreGraphics.CGFloatArray(5)
context = CoreGraphics.CGBitmapContextCreateWithColor(x, y, colors_space, colors)
context.setInterpolationQuality(CoreGraphics.kCGInterpolationHigh)
if im1.size[0] <= x:
if source_width <= x:
# for small image just copy:
tools.copy_file(srcFile, destFile)
else:
if y <= 0:
# keep ratio :
y = int(float(x) * float(source_height) / float(source_width))
y = get_pow_2_multiple(y)
debug.debug("Resize image: " + srcFile + " size=(" + str(source_width) + "x" + str(source_height) + ") -> (" + str(x) + "x" + str(y) + ")")
source_image_rect = CoreGraphics.CGRectMake(0, 0, source_width, source_height)
new_image = source_image.createWithImageInRect(source_image_rect)
colors_space = CoreGraphics.CGColorSpaceCreateDeviceRGB()
colors = CoreGraphics.CGFloatArray(5)
context = CoreGraphics.CGBitmapContextCreateWithColor(x, y, colors_space, colors)
context.setInterpolationQuality(CoreGraphics.kCGInterpolationHigh)
new_image_rect = CoreGraphics.CGRectMake(0, 0, x, y)
context.drawImage(new_image_rect, new_image)
tools.create_directory_of_file(destFile)
@ -46,6 +54,7 @@ def resize(srcFile, destFile, x, y):
if y <= 0:
# keep ratio :
y = int(float(x) * float(im1.size[1]) / float(im1.size[0]))
y = get_pow_2_multiple(y)
# use one of these filter options to resize the image
tmpImage = im1.resize((x, y), Image.ANTIALIAS)
tools.create_directory_of_file(destFile)