Module: Rabbit::Renderer::Engine::Cairo
Instance Attribute Summary collapse
Class Method Summary
collapse
Instance Method Summary
collapse
-
#alpha_available? ⇒ Boolean
-
#background_image=(pixbuf) ⇒ Object
-
#create_pango_context ⇒ Object
-
#draw_arc(filled, x, y, w, h, a1, a2, color = nil, params = {}) ⇒ Object
-
#draw_arc_by_radius(filled, x, y, r, a1, a2, color = nil, params = {}) ⇒ Object
-
#draw_background(slide) ⇒ Object
-
#draw_layout(layout, x, y, color = nil, params = {}) ⇒ Object
-
#draw_line(x1, y1, x2, y2, color = nil, params = {}) ⇒ Object
-
#draw_lines(points, color = nil, params = {}) ⇒ Object
-
#draw_pixbuf(pixbuf, x, y, params = {}) ⇒ Object
-
#draw_polygon(filled, points, color = nil, params = {}) ⇒ Object
-
#draw_poppler_page(page, x, y, params = {}) ⇒ Object
-
#draw_rectangle(filled, x, y, w, h, color = nil, params = {}) ⇒ Object
-
#draw_rounded_rectangle(filled, x, y, w, h, radius, color = nil, params = {}) ⇒ Object
-
#draw_rsvg_handle(handle, x, y, params = {}) ⇒ Object
-
#finish_context ⇒ Object
-
#finish_renderer ⇒ Object
-
#init_context(context) ⇒ Object
-
#init_renderer(drawable) ⇒ Object
-
#make_layout(text) ⇒ Object
-
#prepare_renderer(drawable) ⇒ Object
-
#reflect_context(base, params = {}) ⇒ Object
-
#restore_context ⇒ Object
-
#rotate_context(angle, params = {}) ⇒ Object
-
#save_context ⇒ Object
-
#scale_context(x, y, params = {}) ⇒ Object
-
#set_font_resolution(context) ⇒ Object
-
#set_source_pixbuf(pixbuf, params) ⇒ Object
-
#shear_context(x, y, params = {}) ⇒ Object
-
#to_gdk_rgb(color) ⇒ Object
-
#translate_context(x, y, params = {}) ⇒ Object
Methods included from Kernel
#draw_circle, #draw_circle_by_radius, #draw_cone, #draw_cube, #draw_dodecahedron, #draw_flag, #draw_flag_layout, #draw_icosahedron, #draw_octahedron, #draw_rectangle_flag, #draw_slide, #draw_sphere, #draw_teapot, #draw_tetrahedron, #draw_torus, #draw_triangle_flag, #flag_size, #gl_call_list, #gl_compile, #gl_supported?, #make_color, #new_list_id, #z_far, #z_view
Instance Attribute Details
#background=(value) ⇒ Object
Sets the attribute background
19
20
21
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 19
def background=(value)
@background = value
end
|
#foreground=(value) ⇒ Object
Sets the attribute foreground
19
20
21
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 19
def foreground=(value)
@foreground = value
end
|
Class Method Details
.priority ⇒ Object
14
15
16
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 14
def priority
100
end
|
Instance Method Details
#alpha_available? ⇒ Boolean
21
22
23
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 21
def alpha_available?
true
end
|
#background_image=(pixbuf) ⇒ Object
25
26
27
28
29
30
31
32
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 25
def background_image=(pixbuf)
surface = ::Cairo::ImageSurface.new(::Cairo::FORMAT_A1, 1, 1)
context = ::Cairo::Context.new(surface)
context.set_source_pixbuf(pixbuf)
@background_image = context.source
@background_image.extend = ::Cairo::EXTEND_REPEAT
pixbuf
end
|
#create_pango_context ⇒ Object
285
286
287
288
289
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 285
def create_pango_context
context = Pango::CairoFontMap.default.create_context
set_font_resolution(context)
context
end
|
#draw_arc(filled, x, y, w, h, a1, a2, color = nil, params = {}) ⇒ Object
150
151
152
153
154
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 150
def draw_arc(filled, x, y, w, h, a1, a2, color=nil, params={})
r = w * 0.5
draw_arc_by_radius(filled, x + w * 0.5, y + h * 0.5,
r, a1, a2, color, params)
end
|
#draw_arc_by_radius(filled, x, y, r, a1, a2, color = nil, params = {}) ⇒ Object
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 156
def draw_arc_by_radius(filled, x, y, r, a1, a2, color=nil, params={})
x, y = from_screen(x, y)
a1, a2 = convert_angle(a1, a2)
@context.save do
set_source(color, params)
set_line_options(params)
args = [x, y, r, a1, a2]
action, = cairo_action(filled, params)
@context.move_to(x, y) unless action == :stroke
@context.arc(*args)
@context.close_path unless action == :stroke
apply_cairo_action(filled, params)
end
end
|
#draw_background(slide) ⇒ Object
102
103
104
105
106
107
108
109
110
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 102
def draw_background(slide)
super
if @background_image
@context.save do
@context.set_source(@background_image)
@context.paint
end
end
end
|
#draw_layout(layout, x, y, color = nil, params = {}) ⇒ Object
189
190
191
192
193
194
195
196
197
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 189
def draw_layout(layout, x, y, color=nil, params={})
x, y = from_screen(x, y)
@context.save do
set_source(color, params)
set_line_options(params)
@context.move_to(x, y)
@context.show_pango_layout(layout)
end
end
|
#draw_line(x1, y1, x2, y2, color = nil, params = {}) ⇒ Object
112
113
114
115
116
117
118
119
120
121
122
123
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 112
def draw_line(x1, y1, x2, y2, color=nil, params={})
x1, y1 = from_screen(x1, y1)
x2, y2 = from_screen(x2, y2)
@context.save do
set_source(color, params)
set_line_options(params)
@context.new_path
@context.move_to(x1, y1)
@context.line_to(x2, y2)
apply_cairo_action(false, params)
end
end
|
#draw_lines(points, color = nil, params = {}) ⇒ Object
171
172
173
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 171
def draw_lines(points, color=nil, params={})
draw_polygon(false, points, color, params.merge({:opened => true}))
end
|
#draw_pixbuf(pixbuf, x, y, params = {}) ⇒ Object
199
200
201
202
203
204
205
206
207
208
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 199
def draw_pixbuf(pixbuf, x, y, params={})
x, y = from_screen(x, y)
@context.save do
@context.translate(x, y)
set_source_pixbuf(pixbuf, params)
@context.paint(params[:alpha])
end
_draw_reflected_pixbuf(pixbuf, x, y, params)
end
|
#draw_polygon(filled, points, color = nil, params = {}) ⇒ Object
175
176
177
178
179
180
181
182
183
184
185
186
187
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 175
def draw_polygon(filled, points, color=nil, params={})
return if points.empty?
@context.save do
set_source(color, params)
set_line_options(params)
@context.move_to(*from_screen(*points.first))
points[1..-1].each do |x, y|
@context.line_to(*from_screen(x, y))
end
@context.line_to(*from_screen(*points.first)) unless params[:opened]
apply_cairo_action(filled, params)
end
end
|
#draw_poppler_page(page, x, y, params = {}) ⇒ Object
263
264
265
266
267
268
269
270
271
272
273
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 263
def draw_poppler_page(page, x, y, params={})
x, y = from_screen(x, y)
w, h = page.size
width = (params[:width] || w).to_f
height = (params[:height] || h).to_f
@context.save do
@context.translate(x, y)
@context.scale(width / w, height / h)
@context.render_poppler_page(page)
end
end
|
#draw_rectangle(filled, x, y, w, h, color = nil, params = {}) ⇒ Object
125
126
127
128
129
130
131
132
133
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 125
def draw_rectangle(filled, x, y, w, h, color=nil, params={})
x, y = from_screen(x, y)
@context.save do
set_source(color, params)
set_line_options(params)
@context.rectangle(x, y, w, h)
apply_cairo_action(filled, params)
end
end
|
#draw_rounded_rectangle(filled, x, y, w, h, radius, color = nil, params = {}) ⇒ Object
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 135
def draw_rounded_rectangle(filled, x, y, w, h, radius,
color=nil, params={})
x, y = from_screen(x, y)
x_radius = params[:x_radius] || radius
y_radius = params[:y_radius] || radius
@context.save do
set_source(color, params)
set_line_options(params)
@context.new_path
@context.rounded_rectangle(x, y, w, h, x_radius, y_radius)
apply_cairo_action(filled, params)
end
end
|
#draw_rsvg_handle(handle, x, y, params = {}) ⇒ Object
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 248
def draw_rsvg_handle(handle, x, y, params={})
x, y = from_screen(x, y)
dim = handle.dimensions
width = (params[:width] || dim.width).to_f
height = (params[:height] || dim.height).to_f
@context.save do
@context.translate(x, y)
@context.scale(width / dim.width, height / dim.height)
@context.render_rsvg_handle(handle)
end
_draw_reflected_rsvg_handle(handle, x, y, width, height,
params)
end
|
#finish_context ⇒ Object
54
55
56
57
58
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 54
def finish_context
@contexts.pop
@context.destroy if @context.respond_to?(:destroy)
@context = @contexts.last
end
|
#finish_renderer ⇒ Object
41
42
43
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 41
def finish_renderer
finish_context
end
|
#init_context(context) ⇒ Object
45
46
47
48
49
50
51
52
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 45
def init_context(context)
@context = context
@contexts ||= []
@contexts.push(@context)
set_line_width(1)
@context.line_cap = ::Cairo::LINE_CAP_ROUND
@context.line_join = ::Cairo::LINE_JOIN_ROUND
end
|
#init_renderer(drawable) ⇒ Object
37
38
39
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 37
def init_renderer(drawable)
init_context(drawable.create_cairo_context)
end
|
#make_layout(text) ⇒ Object
275
276
277
278
279
280
281
282
283
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 275
def make_layout(text)
attributes, text = Pango.parse_markup(text)
layout = @context.create_pango_layout
layout.text = text
layout.attributes = attributes
set_font_resolution(layout.context)
@context.update_pango_layout(layout)
layout
end
|
#prepare_renderer(drawable) ⇒ Object
34
35
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 34
def prepare_renderer(drawable)
end
|
#reflect_context(base, params = {}) ⇒ Object
76
77
78
79
80
81
82
83
84
85
86
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 76
def reflect_context(base, params={})
case base
when :y
matrix = make_matrix(-1, 0, 0,
0, 1, 0)
else
matrix = make_matrix(1, 0, 0,
0, -1, 0)
end
@context.transform(matrix)
end
|
#restore_context ⇒ Object
98
99
100
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 98
def restore_context
@context.restore
end
|
#rotate_context(angle, params = {}) ⇒ Object
68
69
70
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 68
def rotate_context(angle, params={})
@context.rotate(convert_angle(angle, 0)[0])
end
|
#save_context ⇒ Object
93
94
95
96
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 93
def save_context
@context.save
super
end
|
#scale_context(x, y, params = {}) ⇒ Object
72
73
74
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 72
def scale_context(x, y, params={})
@context.scale(x, y)
end
|
#set_font_resolution(context) ⇒ Object
291
292
293
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 291
def set_font_resolution(context)
context.resolution = @canvas.font_resolution
end
|
#set_source_pixbuf(pixbuf, params) ⇒ Object
210
211
212
213
214
215
216
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
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 210
def set_source_pixbuf(pixbuf, params)
draw_scaled_pixbuf = params[:draw_scaled_pixbuf]
draw_scaled_pixbuf = @draw_scaled_image if draw_scaled_pixbuf.nil?
width = (params[:width] || pixbuf.width).to_f
height = (params[:height] || pixbuf.height).to_f
if [width, height] == [pixbuf.width, pixbuf.height]
@context.set_source_pixbuf(pixbuf, 0, 0)
return
end
case draw_scaled_pixbuf
when true
scaled_pixbuf = pixbuf.scale(width, height)
@context.set_source_pixbuf(scaled_pixbuf, 0, 0)
when false
@context.set_source_pixbuf(pixbuf, 0, 0)
matrix = ::Cairo::Matrix.scale(pixbuf.width / width,
pixbuf.height / height)
@context.source.matrix = matrix
else
scales = [4, 3, 2]
scales.each do |scale|
if width * scale < pixbuf.width and height * scale < pixbuf.height
scaled_pixbuf = pixbuf.scale(width * scale, height * scale)
@context.set_source_pixbuf(scaled_pixbuf)
matrix = ::Cairo::Matrix.scale(scale, scale)
@context.source.matrix = matrix
return
end
end
@context.set_source_pixbuf(pixbuf, 0, 0)
matrix = ::Cairo::Matrix.scale(pixbuf.width / width,
pixbuf.height / height)
@context.source.matrix = matrix
end
end
|
#shear_context(x, y, params = {}) ⇒ Object
88
89
90
91
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 88
def shear_context(x, y, params={})
@context.transform(make_matrix(1, x, 0,
y, 1, 0))
end
|
#to_gdk_rgb(color) ⇒ Object
60
61
62
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 60
def to_gdk_rgb(color)
make_color(color).to_gdk_rgb
end
|
#translate_context(x, y, params = {}) ⇒ Object
64
65
66
|
# File 'lib/rabbit/renderer/engine/cairo.rb', line 64
def translate_context(x, y, params={})
@context.translate(x, y)
end
|