Title: [890] trunk/image_voodoo:
Add the ability to work with in-memory bytes as image source and desination
(rather than files) and add a couple samples.
- Revision
- 890
- Author
- headius
- Date
- 2008-02-07 00:37:07 -0500 (Thu, 07 Feb 2008)
Log Message
Add the ability to work with in-memory bytes as image source and desination (rather than files) and add a couple samples.
Modified Paths
Added Paths
Diff
Modified: trunk/image_voodoo/lib/image_voodoo.rb (889 => 890)
--- trunk/image_voodoo/lib/image_voodoo.rb 2008-02-07 05:00:46 UTC (rev 889)
+++ trunk/image_voodoo/lib/image_voodoo.rb 2008-02-07 05:37:07 UTC (rev 890)
@@ -6,6 +6,8 @@
import java.awt.geom.AffineTransform
import java.awt.image.BufferedImage
import javax.imageio.ImageIO
+ import java.io.ByteArrayInputStream
+ import java.io.ByteArrayOutputStream
def initialize(src)
@src = ""
@@ -47,6 +49,12 @@
true
end
+ def bytes(format)
+ out = ByteArrayOutputStream.new
+ ImageIO.write(@src, format, out)
+ String.from_java_bytes(out.to_byte_array)
+ end
+
def thumbnail(size)
scale = size.to_f / (width > height ? width : height)
resize((width * scale).to_i, (height * scale).to_i) {|image| yield image }
@@ -59,6 +67,14 @@
def self.with_image(file)
yield ImageVoodoo.new(ImageIO.read(java.io.File.new(file)))
end
+
+ def self.with_bytes(bytes)
+ if String === bytes
+ bytes = bytes.to_java_bytes
+ end
+
+ yield ImageVoodoo.new(ImageIO.read(ByteArrayInputStream.new(bytes)))
+ end
end
#ImageVoodoo.with_image(ARGV[0]) do |img|
Added: trunk/image_voodoo/samples/file_thumbnail.rb (0 => 890)
--- trunk/image_voodoo/samples/file_thumbnail.rb (rev 0)
+++ trunk/image_voodoo/samples/file_thumbnail.rb 2008-02-07 05:37:07 UTC (rev 890)
@@ -0,0 +1,11 @@
+require 'image_voodoo'
+
+# reads in the file specified by ARGV[0], transforms it into a 32-pixel thumbnail,
+# and writes it out to the file specified by ARGV[1], using that extension as the
+# target format.
+ImageVoodoo.with_image(ARGV[0]) do |img|
+ img.thumbnail(32) do |img2|
+ img2.save(ARGV[1])
+ end
+end
+
Added: trunk/image_voodoo/samples/in-memory.rb (0 => 890)
--- trunk/image_voodoo/samples/in-memory.rb (rev 0)
+++ trunk/image_voodoo/samples/in-memory.rb 2008-02-07 05:37:07 UTC (rev 890)
@@ -0,0 +1,11 @@
+require 'image_voodoo'
+
+# reads in the image at ARGV[0], transforms it into a 32-pixel thumbnail in-memory,
+# and writes it back out as a png to the file specified by ARGV[1]
+ImageVoodoo.with_bytes(File.read(ARGV[0])) do |img|
+ img.thumbnail(32) do |img2|
+ File.open(ARGV[1], 'w') do |file|
+ file.write(img2.bytes('png'))
+ end
+ end
+end
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