Module: GD2

Included in:
Rchart
Defined in:
lib/gd2_helper.rb

Instance Method Summary collapse

Instance Method Details

#add_point(x, y) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 10

def add_point(x,y)
  Canvas::Point.new(x,y)
end

#export_image(file_name, options = {}) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 122

def export_image(file_name,options={})
  @picture.export(file_name,options)
end

#gd2(fmt = GD2::FMT_RAW, img = self.picture) ⇒ Object

Format flags for Image#gd2 GD2::FMT_RAW GD2::FMT_COMPRESSED



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# File 'lib/gd2_helper.rb', line 150

def gd2(fmt= GD2::FMT_RAW,img=self.picture)
  img.gd2(fmt)
end

#get_image_size(image) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 88

def get_image_size(image)
  [image.width,image.height]
end

#image_color_allocate(picture, r, g, b) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 14

def image_color_allocate(picture,r,g,b)
  Color.new(r,g,b) # returns an integer value
end

#image_color_at(picture, x, y) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 41

def image_color_at(picture,x,y)
  pixel = picture.get_pixel(x, y)
  #	rgb_color(picture, pixel)
end

#image_color_transparent(im, r, g, b) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 68

def image_color_transparent(im,r,g,b)
  color = allocate_color(im, r, g, b)
  # im.save_alpha =true
  im.transparent = color

end

#image_copy(src_pic, dest_pic, dest_x, dest_y, self_x, self_y, width, height) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 64

def image_copy(src_pic,dest_pic,dest_x, dest_y, self_x, self_y, width, height)
  dest_pic.copy_from(src_pic,dest_x, dest_y, self_x, self_y, width, height)
end

#image_copy_merge(src_pic, dest_pic, dst_x, dst_y, src_x, src_y, dst_w, dst_h, pct, gray = false) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 60

def image_copy_merge(src_pic,dest_pic, dst_x, dst_y, src_x, src_y, dst_w, dst_h, pct, gray = false)
  dest_pic.merge_from(src_pic, dst_x, dst_y, src_x, src_y, dst_w, dst_h,pct/100.0)
end

#image_create_from_gif(file_name) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 85

def image_create_from_gif(file_name)
  Image.import(file_name)
end

#image_create_from_jpeg(file_name) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 82

def image_create_from_jpeg(file_name)
  Image.import(file_name)
end

#image_create_from_png(file_name) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 79

def image_create_from_png(file_name)
  Image.import(file_name)
end

#image_create_true_color(width, height) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 5

def image_create_true_color(width,height)
  # Image::IndexedColor.new(width,height)
  Image::TrueColor.new(width,height)
end

#image_destroy(image) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 75

def image_destroy(image)
  # GD2FFI.gdImageDestroy(image.image_ptr)
end

#image_filled_polygon(picture, points, r, g, b, points_count = 0) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 92

def image_filled_polygon(picture,points,r,g,b,points_count=0)
  color =  allocate_color(picture,r,g,b)
  polygon_points = []
  i=0
  if points_count == 0
    num_points = (points.length+1)
  else
    num_points = points_count+points_count
  end
  while(i<=num_points)
    j =i
    polygon_points << Canvas::Point.new(points[j],points[j+1]) if(!points[j+1].nil?)
    i = i+2
  end
  polygon=Canvas::FilledPolygon.new(polygon_points)
  polygon.draw(picture,color.to_i)
end

#image_filled_rectangle(picture, x1, y1, x2, y2, r, g, b) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 53

def image_filled_rectangle(picture,x1,y1,x2,y2,r,g,b)
  color =  allocate_color(picture, r, g, b)
  point1 = add_point(x1,y1)
  point2 = add_point(x2,y2)
  filled_rectangle = Canvas::FilledRectangle.new(point1,point2)
  filled_rectangle.draw(picture,color.rgba)
end

#image_ftb_box(font_size, angle, font_name, string, x = 0, y = 0, options = {}) ⇒ Object

color helper



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# File 'lib/gd2_helper.rb', line 27

def image_ftb_box(font_size,angle,font_name,string,x=0,y=0,options={})
  angle = deg2rad(angle)
  font = Font::TrueType.new(font_name, font_size,options)
  position = font.bounding_rectangle(string,angle)
  [position[:lower_left][0],position[:lower_left][1],position[:lower_right][0],position[:lower_right][1],position[:upper_right][0],position[:upper_right][1],position[:upper_left][0],position[:upper_left][1]]
end

#image_line(picture, x1, y1, x2, y2, r, g, b) ⇒ Object

rgb_color(picture, pixel)



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# File 'lib/gd2_helper.rb', line 45

def image_line(picture,x1,y1,x2,y2,r,g,b)
  color = allocate_color(picture,r,g,b)
  point1 = add_point(x1,y1)
  point2 = add_point(x2,y2)
  line = Canvas::Line.new(point1,point2)
  line.draw(picture,color)
end

#image_set_pixel(picture, x, y, r, g, b) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 36

def image_set_pixel(picture,x,y,r,g,b)
  color= image_color_allocate(picture,r,g,b)
  picture.set_pixel(x,y,color.rgba.to_i)
end

#image_ttf_text(picture, font_size, angle, x_pos, y_pos, fg_color, font_name, string, options = {}) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 18

def image_ttf_text(picture,font_size,angle,x_pos,y_pos,fg_color,font_name,string,options={})
  angle = deg2rad(angle)
  font = Font::TrueType.new(font_name, font_size,options)
  point= add_point(x_pos,y_pos)
  text = Canvas::Text.new(font,point,angle,string)
  text.draw(picture,fg_color.rgba)
end

#render_gd_str(img = self.picture) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 144

def render_gd_str(img=self.picture)
  img.gd(fgcolor)
end

#render_gif_str(img = self.picture) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 136

def render_gif_str(img=self.picture)
  img.gif
end

#render_jepeg_str(level = 9, img = self.picture) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 133

def render_jepeg_str(level=9,img=self.picture)
  img.png(level)
end

#render_jpeg(file_name, quality = 0) ⇒ Object

render Graph as jpeg format



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# File 'lib/gd2_helper.rb', line 155

def render_jpeg(file_name,quality=0)
  print_errors(@error_interface) if ( @error_reporting )
  file = File.new(file_name,"wb")
  file.write @picture.jpeg(quality)
  file.close
end

#render_png(file_name, level = 9) ⇒ Object

render Graph as png format



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# File 'lib/gd2_helper.rb', line 115

def render_png(file_name,level=9)
  print_errors(@error_interface) if ( @error_reporting )
  file = File.new(file_name,"wb")
  file.write @picture.png(level)
  file.close
end

#render_png_str(level = 9, img = self.picture) ⇒ Object

Outputs the image in PNG format as String object. This method will be especially useful when you want to transmit an image directly to an user(i.e, without first writing it to a file)



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# File 'lib/gd2_helper.rb', line 129

def render_png_str(level=9,img=self.picture)
  img.png(level)
end

#render_wbmp_str(fgcolor, img = self.picture) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 140

def render_wbmp_str(fgcolor,img=self.picture)
  img.wbmp(fgcolor)
end

#rgb_color(picture, pixel) ⇒ Object 



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# File 'lib/gd2_helper.rb', line 110

def rgb_color(picture,pixel)
  color = picture.pixel2color(pixel)
  [color.r,color.g,color.b]
end