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Adds dpi to the Image info dictinoary.

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gcq 2014-06-28 23:21:22 +02:00
parent 103354facc
commit 9318755a18
1 changed files with 4 additions and 1 deletions
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5
PIL/BmpImagePlugin.py
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@ -28,6 +28,7 @@ __version__ = "0.7"
from PIL import Image, ImageFile, ImagePalette, _binary from PIL import Image, ImageFile, ImagePalette, _binary
import math
i8 = _binary.i8 i8 = _binary.i8
i16 = _binary.i16le i16 = _binary.i16le
@ -88,6 +89,7 @@ class BmpImageFile(ImageFile.ImageFile):
bits = i16(s[14:]) bits = i16(s[14:])
self.size = i32(s[4:]), i32(s[8:]) self.size = i32(s[4:]), i32(s[8:])
compression = i32(s[16:]) compression = i32(s[16:])
pxperm = (i32(s[24:]), i32(s[28:])) # Pixels per meter
lutsize = 4 lutsize = 4
colors = i32(s[32:]) colors = i32(s[32:])
direction = -1 direction = -1
@ -162,6 +164,7 @@ class BmpImageFile(ImageFile.ImageFile):
(rawmode, ((self.size[0]*bits+31)>>3)&(~3), direction))] (rawmode, ((self.size[0]*bits+31)>>3)&(~3), direction))]
self.info["compression"] = compression self.info["compression"] = compression
self.info["dpi"] = tuple(map(lambda x: math.ceil(x / 39.3701), pxperm))
def _open(self): def _open(self):
@ -208,7 +211,7 @@ def _save(im, fp, filename, check=0):
dpi = info.get("dpi", (96, 96)) dpi = info.get("dpi", (96, 96))
# 1 meter == 39.3701 inches # 1 meter == 39.3701 inches
ppm = map(lambda x: int(x * 39.3701), dpi) ppm = tuple(map(lambda x: int(x * 39.3701), dpi))
stride = ((im.size[0]*bits+7)//8+3)&(~3) stride = ((im.size[0]*bits+7)//8+3)&(~3)
header = 40 # or 64 for OS/2 version 2 header = 40 # or 64 for OS/2 version 2