Class: Tinyimg

Inherits:
Object
  • Object
show all
Defined in:
lib/tinyimg.rb,
ext/tinyimg/tinyimg.c

Defined Under Namespace

Classes: Image

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



4
5
6
 
# File 'lib/tinyimg.rb', line 4

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



4
5
6
 
# File 'lib/tinyimg.rb', line 4

def width
  @width
end

Class Method Details

.from_file(filename) ⇒ Object 



8
9
10
 
# File 'lib/tinyimg.rb', line 8

def self.from_file(filename)
  new(:filename, filename)
end

.from_io(io) ⇒ Object 



12
13
14
 
# File 'lib/tinyimg.rb', line 12

def self.from_io(io)
  from_string(io.read)
end

.from_string(data) ⇒ Object 



16
17
18
 
# File 'lib/tinyimg.rb', line 16

def self.from_string(data)
  new(:string, data)
end

Instance Method Details

#crop(**kwargs) ⇒ Object 



68
69
70
 
# File 'lib/tinyimg.rb', line 68

def crop(**kwargs)
  dup.crop!(**kwargs)
end

#crop!(x: 0, y: 0, width: nil, height: nil) ⇒ Object 



72
73
74
75
76
77
 
# File 'lib/tinyimg.rb', line 72

def crop!(x: 0, y: 0, width: nil, height: nil)
  width ||= self.width
  height ||= self.height

  internal_crop!(x, y, width, height)
end

#dimensions ⇒ Object 



20
21
22
 
# File 'lib/tinyimg.rb', line 20

def dimensions
  [width, height]
end

#fill_transparent_color(red, green, blue) ⇒ Object

Implemented in C def fill_transparent_color!(red, green, blue) end



83
84
85
 
# File 'lib/tinyimg.rb', line 83

def fill_transparent_color(red, green, blue)
  dup.fill_transparent_color!(red, green, blue)
end

#fill_transparent_color!(red_value, green_value, blue_value) ⇒ Object 



249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
 
# File 'ext/tinyimg/tinyimg.c', line 249

VALUE fill_transparent_color_bang(VALUE self, VALUE red_value, VALUE green_value, VALUE blue_value)
{
  gdImagePtr image_in, image_out;
  int red, green, blue;
  int color;

  Check_Type(red_value, T_FIXNUM);
  Check_Type(green_value, T_FIXNUM);
  Check_Type(blue_value, T_FIXNUM);

  red = FIX2INT(red_value);
  green = FIX2INT(green_value);
  blue = FIX2INT(blue_value);

  if (red < 0 || green < 0 || blue < 0 || red > 255 || green > 255 || blue > 255) {
    rb_raise(get_error_class(self), "red, green and blue must be integers between 0 and 255");
  }

  image_in = get_image_data(self);
  image_out = gdImageCreateTrueColor(gdImageSX(image_in), gdImageSY(image_in));

  color = gdImageColorAllocate(image_out, red, green, blue);
  gdImageFilledRectangle(image_out, 0, 0, gdImageSX(image_in), gdImageSY(image_in), color);

  gdImageCopy(
      image_out, image_in, 0, 0, 0, 0,
      gdImageSX(image_in), gdImageSY(image_in)
  );

  set_image_data(self, image_out);

  return self;
}

#resize(*args) ⇒ Object 



24
25
26
 
# File 'lib/tinyimg.rb', line 24

def resize(*args)
  dup.resize!(*args)
end

#resize!(*args) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/tinyimg.rb', line 28

def resize!(*args)
  case args.map(&:class)
  when [Integer, Integer]
    resize_exact!(*args)
  when [Hash]
    width, height = convert_hash_to_exact_dimensions(args.first)
    resize_exact!(width, height)
  else
    raise Error, "#resize and #resize! accept either (width, height) or a hash with :width and/or :height keys"
  end
end

#resize_exact(width, height) ⇒ Object 



40
41
42
 
# File 'lib/tinyimg.rb', line 40

def resize_exact(width, height)
  dup.resize_exact!(width, height)
end

#resize_exact!(width_value, height_value) ⇒ Object 



217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
 
# File 'ext/tinyimg/tinyimg.c', line 217

VALUE resize_exact_bang(VALUE self, VALUE width_value, VALUE height_value)
{
  gdImagePtr image_in, image_out;
  int width, height;

  Check_Type(width_value, T_FIXNUM);
  Check_Type(height_value, T_FIXNUM);

  width = FIX2INT(width_value);
  height = FIX2INT(height_value);

  if (width <= 0 || height <= 0) {
    rb_raise(get_error_class(self), "width and height must both be positive integers");
  }

  image_in = get_image_data(self);
  image_out = gdImageCreateTrueColor(width, height);
  set_alpha(image_out);

  gdImageCopyResampled(
      image_out, image_in, 0, 0, 0, 0,
      gdImageSX(image_out), gdImageSY(image_out),
      gdImageSX(image_in), gdImageSY(image_in)
  );

  set_image_data(self, image_out);

  retrieve_image_dimensions(self);

  return self;
}

#resize_to_fill(new_width, new_height) ⇒ Object 



58
59
60
 
# File 'lib/tinyimg.rb', line 58

def resize_to_fill(new_width, new_height)
  dup.resize_to_fill!(new_width, new_height)
end

#resize_to_fill!(new_width, new_height) ⇒ Object 



62
63
64
65
66
 
# File 'lib/tinyimg.rb', line 62

def resize_to_fill!(new_width, new_height)
  resize_to_fit_or_fill!(new_width, new_height) do |old_ratio, new_ratio|
    old_ratio < new_ratio
  end
end

#resize_to_fit(new_width, new_height) ⇒ Object

Implemented in C def resize_exact!(width, height) end



48
49
50
 
# File 'lib/tinyimg.rb', line 48

def resize_to_fit(new_width, new_height)
  dup.resize_to_fit!(new_width, new_height)
end

#resize_to_fit!(new_width, new_height) ⇒ Object 



52
53
54
55
56
 
# File 'lib/tinyimg.rb', line 52

def resize_to_fit!(new_width, new_height)
  resize_to_fit_or_fill!(new_width, new_height) do |old_ratio, new_ratio|
    old_ratio > new_ratio
  end
end

#save(filename) ⇒ Object 



87
88
89
90
91
92
93
94
95
96
97
98
99
100
 
# File 'lib/tinyimg.rb', line 87

def save(filename)
  if respond_to?(:save_to_file)
    save_to_file(filename)
  else
    data = case determine_by_extension(filename)
           when :jpeg then to_jpeg
           when :png  then to_png
           end

    File.write(filename, data)
  end

  self
end

#to_jpeg(*args) ⇒ Object 



145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'ext/tinyimg/tinyimg.c', line 145

VALUE to_jpeg(int argc, VALUE *argv, VALUE self)
{
  gdImagePtr image;
  char *image_data;
  int size, quality;
  VALUE quality_value;

  rb_scan_args(argc, argv, "01", &quality_value);

  if (NIL_P(quality_value)) {
    quality = -1;
  }
  else {
    Check_Type(quality_value, T_FIXNUM);
    quality = FIX2INT(quality_value);
  }

  if (quality < -1 || quality > 100) {
    rb_raise(get_error_class(self), "Quality must be between 0 and 100, or -1 for default");
  }

  image = get_image_data(self);

  image_data = (char *) gdImageJpegPtr(image, &size, quality);
  if (!image_data) {
    rb_raise(get_error_class(self), "Unknown error occurred while trying to build a JPEG");
  }

  VALUE output = rb_str_new(image_data, size);
  gdFree(image_data);
  return output;
}

#to_png(*args) ⇒ Object 



178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
 
# File 'ext/tinyimg/tinyimg.c', line 178

VALUE to_png(int argc, VALUE *argv, VALUE self)
{
  gdImagePtr image;
  char *image_data;
  int size;
  VALUE compression_value;
  int compression;

  rb_scan_args(argc, argv, "01", &compression_value);

  image = get_image_data(self);

  if (NIL_P(compression_value)) {
    image_data = (char *) gdImagePngPtr(image, &size);
  }
  else {
    Check_Type(compression_value, T_FIXNUM);
    compression = FIX2INT(compression_value);

    if (compression < 0 || compression > 9) {
      rb_raise(get_error_class(self), "Compression must be between 0 and 9");
    }

#ifdef HAVE_GDIMAGEPNGPTREX
    image_data = (char *) gdImagePngPtrEx(image, &size, compression);
#else
    image_data = (char *) gdImagePngPtr(image, &size);
#endif
  }

  if (!image_data) {
    rb_raise(get_error_class(self), "Unknown error occurred while trying to build a PNG");
  }

  VALUE output = rb_str_new(image_data, size);
  gdFree(image_data);
  return output;
}