Class: DXRubySDL::Image
- Inherits:
-
Object
- Object
- DXRubySDL::Image
- Includes:
- Color
- Defined in:
- lib/dxruby_sdl/image.rb
Instance Attribute Summary collapse
-
#_surface ⇒ Object
readonly
Returns the value of attribute _surface.
Class Method Summary collapse
- .load(filename, x = nil, y = nil, width = nil, height = nil) ⇒ Object
- .load_tiles(filename, xcount, ycount) ⇒ Object (also: loadTiles, load_to_array)
Instance Method Summary collapse
- #box(x1, y1, x2, y2, color) ⇒ Object
- #box_fill(x1, y1, x2, y2, color) ⇒ Object (also: #boxFill)
- #circle(x, y, r, color) ⇒ Object
- #circle_fill(x, y, r, color) ⇒ Object (also: #circleFill)
- #compare(x, y, color) ⇒ Object
- #draw_font(x, y, string, font, color = [255, 255, 255]) ⇒ Object (also: #drawFont)
- #height ⇒ Object
-
#initialize(width, height, color = [0, 0, 0, 0]) ⇒ Image
constructor
A new instance of Image.
- #line(x1, y1, x2, y2, color) ⇒ Object
- #set_color_key(color) ⇒ Object (also: #setColorKey)
- #slice(x, y, width, height) ⇒ Object
- #width ⇒ Object
Methods included from Color
Constructor Details
#initialize(width, height, color = [0, 0, 0, 0]) ⇒ Image
Returns a new instance of Image.
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# File 'lib/dxruby_sdl/image.rb', line 32 def initialize(width, height, color = [0, 0, 0, 0]) @color = color if width == 0 && height == 0 return end @_surface = SDL::Surface.new(SDL::SWSURFACE, width, height, Window.send(:screen)) @_surface.fill_rect(0, 0, width, height, @color) end |
Instance Attribute Details
#_surface ⇒ Object (readonly)
Returns the value of attribute _surface.
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# File 'lib/dxruby_sdl/image.rb', line 7 def _surface @_surface end |
Class Method Details
.load(filename, x = nil, y = nil, width = nil, height = nil) ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 9 def self.load(filename, x = nil, y = nil, width = nil, height = nil) image = new(0, 0) surface = SDL::Surface.load(filename) image.instance_variable_set('@_surface', surface) return image end |
.load_tiles(filename, xcount, ycount) ⇒ Object Also known as: loadTiles, load_to_array
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# File 'lib/dxruby_sdl/image.rb', line 16 def self.load_tiles(filename, xcount, ycount) surface = SDL::Surface.load(filename) width = surface.w / xcount height = surface.h / ycount images = [] ycount.times do |y| xcount.times do |x| image = new(0, 0) s = surface.copy_rect(x * width, y * height, width, height) image.instance_variable_set('@_surface', s) images << image end end return images end |
Instance Method Details
#box(x1, y1, x2, y2, color) ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 93 def box(x1, y1, x2, y2, color) x = x1 < x2 ? x1 : x2 w = (x2 - x1).abs y = y1 < y2 ? y1 : y2 h = (y2 - y1).abs lock do @_surface.draw_rect(x, y, w, h, to_sdl_color(color), false, to_sdl_alpha(color)) end return self end |
#box_fill(x1, y1, x2, y2, color) ⇒ Object Also known as: boxFill
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# File 'lib/dxruby_sdl/image.rb', line 105 def box_fill(x1, y1, x2, y2, color) x = x1 < x2 ? x1 : x2 w = (x2 - x1).abs y = y1 < y2 ? y1 : y2 h = (y2 - y1).abs lock do @_surface.draw_rect(x, y, w, h, to_sdl_color(color), true, to_sdl_alpha(color)) end return self end |
#circle(x, y, r, color) ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 77 def circle(x, y, r, color) lock do @_surface.draw_circle(x, y, r, to_sdl_color(color), false, true, to_sdl_alpha(color)) end return self end |
#circle_fill(x, y, r, color) ⇒ Object Also known as: circleFill
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# File 'lib/dxruby_sdl/image.rb', line 85 def circle_fill(x, y, r, color) lock do @_surface.draw_circle(x, y, r, to_sdl_color(color), true, false, to_sdl_alpha(color)) end return self end |
#compare(x, y, color) ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 57 def compare(x, y, color) pixel = lock { @_surface.get_pixel(x, y) } return @_surface.format.get_rgb(pixel) == color end |
#draw_font(x, y, string, font, color = [255, 255, 255]) ⇒ Object Also known as: drawFont
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# File 'lib/dxruby_sdl/image.rb', line 117 def draw_font(x, y, string, font, color = [255, 255, 255]) if string.empty? return end r, g, b = *color h = font._ttf.height + 1 string.lines.each.with_index do |line, i| line.chomp! if line.empty? next end font._ttf.draw_blended_utf8(@_surface, line, x, y + i * h, r, g, b) end return self end |
#height ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 48 def height return @_surface.h end |
#line(x1, y1, x2, y2, color) ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 69 def line(x1, y1, x2, y2, color) lock do @_surface.draw_line(x1, y1, x2, y2, to_sdl_color(color), true, to_sdl_alpha(color)) end return self end |
#set_color_key(color) ⇒ Object Also known as: setColorKey
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# File 'lib/dxruby_sdl/image.rb', line 52 def set_color_key(color) @_surface.set_color_key(SDL::SRCCOLORKEY | SDL::RLEACCEL, color) @_surface = @_surface.display_format_alpha end |
#slice(x, y, width, height) ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 62 def slice(x, y, width, height) s = @_surface.copy_rect(x, y, width, height) image = Image.new(0, 0) image.instance_variable_set('@_surface', s) return image end |
#width ⇒ Object
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# File 'lib/dxruby_sdl/image.rb', line 44 def width return @_surface.w end |