Class: Gluttonberg::Library::Processor::Image
- Inherits:
-
Object
- Object
- Gluttonberg::Library::Processor::Image
- Defined in:
- lib/gluttonberg/library/processor/image.rb
Instance Attribute Summary collapse
-
#asset ⇒ Object
Returns the value of attribute asset.
Class Method Summary collapse
Instance Method Summary collapse
- #generate_cropped_image(x, y, w, h, image_type) ⇒ Object
-
#generate_image_thumb ⇒ Object
Create thumbnailed versions of image attachements.
- #generate_proper_resolution ⇒ Object
-
#generate_thumb_and_proper_resolution ⇒ Object
Generates thumbnails for images, but also additionally checks to see if the uploaded image exceeds the specified maximum, in which case it will resize it down.
- #suggested_measures(object, required_geometry) ⇒ Object
Instance Attribute Details
#asset ⇒ Object
Returns the value of attribute asset.
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# File 'lib/gluttonberg/library/processor/image.rb', line 6 def asset @asset end |
Class Method Details
.process(asset_obj) ⇒ Object
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# File 'lib/gluttonberg/library/processor/image.rb', line 8 def self.process(asset_obj) if asset_obj.asset_type.asset_category.name == "image" processor = self.new processor.asset = asset_obj processor.generate_thumb_and_proper_resolution end end |
Instance Method Details
#generate_cropped_image(x, y, w, h, image_type) ⇒ Object
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# File 'lib/gluttonberg/library/processor/image.rb', line 51 def generate_cropped_image(x , y , w , h, image_type) asset_thumb = asset.asset_thumbnails.find(:first , :conditions => {:thumbnail_type => image_type.to_s }) if asset_thumb.blank? asset_thumb = asset.asset_thumbnails.create({:thumbnail_type => image_type.to_s , :user_generated => true }) else asset_thumb.update_attributes(:user_generated => true) end file_name = "#{asset.class.sizes[image_type.to_sym][:filename]}.#{asset.file_extension}" begin image = QuickMagick::Image.read(asset.tmp_original_file_on_disk).first rescue image = QuickMagick::Image.read(asset.tmp_original_file_on_disk).first end thumb_defined_width = asset.class.sizes[image_type.to_sym][:geometry].split('x').first#.to_i scaling_percent = (thumb_defined_width.to_i/(w.to_i*1.0))*100 image.arguments << " -crop #{w}x#{h}+#{x}+#{y} +repage" if scaling_percent != 1.0 image.arguments << " -resize #{scaling_percent}%" end image.save File.join(asset.tmp_directory, file_name) asset.move_tmp_file_to_actual_directory(file_name , true) end |
#generate_image_thumb ⇒ Object
Create thumbnailed versions of image attachements. TODO: generate thumbnails with the correct extension
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# File 'lib/gluttonberg/library/processor/image.rb', line 77 def generate_image_thumb asset.class.sizes.each_pair do |name, config| asset_thumb = asset.asset_thumbnails.find(:first , :conditions => {:thumbnail_type => name.to_s, :user_generated => true }) if asset_thumb.blank? begin image = QuickMagick::Image.read(asset.tmp_original_file_on_disk).first rescue image = QuickMagick::Image.read(asset.tmp_location_on_disk).first end file_name = "#{config[:filename]}.#{asset.file_extension}" if config[:geometry].include?("#") #todo begin image.resize(suggested_measures(image, config[:geometry])) image.arguments << " -gravity Center -crop #{config[:geometry].delete("#")}+0+0 +repage" rescue => e puts e end else image.resize config[:geometry] end image.save File.join(asset.tmp_directory, file_name) asset.move_tmp_file_to_actual_directory(file_name, true) end # asset_thumb.blank? end # sizes loop asset.update_attribute(:custom_thumbnail , true) end |
#generate_proper_resolution ⇒ Object
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# File 'lib/gluttonberg/library/processor/image.rb', line 108 def generate_proper_resolution asset.make_backup begin image = QuickMagick::Image.read(asset.tmp_original_file_on_disk).first rescue => e image = QuickMagick::Image.read(asset.tmp_location_on_disk).first end actual_width = image.width.to_i actual_height = image.height.to_i asset.update_attributes( :width => actual_width ,:height => actual_height) image.resize asset.class.max_image_size image.save File.join(asset.tmp_directory, asset.file_name) asset.move_tmp_file_to_actual_directory(asset.file_name , true) # remove mp3 info if any image have. it may happen in the case of updating asset from mp3 to image audio = AudioAssetAttribute.find( :first , :conditions => {:asset_id => asset.id}) audio.destroy unless audio.blank? end |
#generate_thumb_and_proper_resolution ⇒ Object
Generates thumbnails for images, but also additionally checks to see if the uploaded image exceeds the specified maximum, in which case it will resize it down.
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# File 'lib/gluttonberg/library/processor/image.rb', line 18 def generate_thumb_and_proper_resolution generate_proper_resolution generate_image_thumb end |
#suggested_measures(object, required_geometry) ⇒ Object
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# File 'lib/gluttonberg/library/processor/image.rb', line 23 def suggested_measures(object , required_geometry) required_geometry = required_geometry.delete("#") required_geometry_tokens = required_geometry.split("x") actual_width = object.width.to_i actual_height = object.height.to_i required_width = required_geometry_tokens.first.to_i required_height = required_geometry_tokens.last.to_i ratio_required = required_width.to_f / required_height ratio_actual = actual_width.to_f / actual_height crossover_ratio = required_height.to_f / actual_height crossover_ratio2 = required_width.to_f / actual_width if(crossover_ratio < crossover_ratio2 ) crossover_ratio = crossover_ratio2 end projected_height = actual_height * crossover_ratio if(projected_height < required_height ) required_width = required_width * (1 + (ratio_actual - ratio_required ) ) end projected_width = actual_width * crossover_ratio "#{(projected_width).ceil}x#{(projected_width/ratio_actual).ceil}" end |