1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
use std::path::Path;
use crate::{
core_shapes::*,
styles::{DefinedDashStyle, DefinedStrokeStyle, FillStyle, Pattern},
text::{DefinedFontDescription, DefinedText, FontDescription},
types::DefinedCoreShapeContext,
};
pub trait Renderer {
// Must be called once before any drawing happens
fn set_size(&mut self, width: f64, height: f64);
fn move_to(&mut self, x: f64, y: f64);
fn stroke(&mut self);
fn fill(&mut self);
fn fill_preserve(&mut self);
fn set_pattern(&mut self, pattern: &Pattern);
fn set_dash(&mut self, dash: &DefinedDashStyle);
fn clear_dash(&mut self);
fn set_line_width(&mut self, width: f64);
fn line_to(&mut self, x: f64, y: f64);
fn rectangle(&mut self, x: f64, y: f64, width: f64, height: f64);
// For a font of size 1.
fn text_extents(&self, text: &str, font: &FontDescription) -> (f64, f64);
fn show_text(&mut self, text: &str, font: &DefinedFontDescription);
fn show_image(&mut self, path: &Path, x: f64, y: f64, width: f64, height: f64);
fn geometry_for_image(&mut self, path: &Path) -> (f64, f64);
}
pub trait Render {
fn render(&self, context: DefinedCoreShapeContext, renderer: &mut dyn Renderer);
}
impl Render for DefinedCoreShape {
fn render(&self, context: DefinedCoreShapeContext, renderer: &mut dyn Renderer) {
match self {
Self::Rectangle(r) => r.render(context, renderer),
Self::Text(t) => t.render(context, renderer),
Self::StraightPath(p) => p.render(context, renderer),
Self::Image(i) => i.render(context, renderer),
}
}
}
fn draw(fill: &FillStyle, stroke: &DefinedStrokeStyle, renderer: &mut dyn Renderer) {
let stroking = !stroke.pattern.is_none();
if !fill.pattern.is_none() {
renderer.set_pattern(&fill.pattern);
if stroking {
renderer.fill_preserve();
} else {
renderer.fill();
}
}
if !stroke.pattern.is_none() {
renderer.set_pattern(&stroke.pattern);
renderer.set_line_width(stroke.line_width);
if let Some(dash) = &stroke.dash {
renderer.set_dash(dash);
}
renderer.stroke();
renderer.clear_dash();
}
}
impl Render for Rectangle {
fn render(&self, context: DefinedCoreShapeContext, renderer: &mut dyn Renderer) {
let bounds = &context.bounds;
renderer.rectangle(bounds.left, bounds.top, bounds.width, bounds.height);
draw(&context.fill, &context.stroke, renderer);
}
}
impl Render for DefinedText {
fn render(&self, context: DefinedCoreShapeContext, renderer: &mut dyn Renderer) {
// TODO: select font, style, text shaping (renderer specific), etc.
let bounds = &context.bounds;
//renderer.move_to(bounds.left, bounds.top + self.font.size);
renderer.move_to(bounds.left, bounds.top);
// TODO: ???
//draw(&context.fill, &context.stroke, renderer);
renderer.show_text(&self.content, &self.font);
}
}
impl Render for DefinedStraightPath {
fn render(&self, context: DefinedCoreShapeContext, renderer: &mut dyn Renderer) {
let mut iter = self.points.iter();
let first_point = match iter.next() {
Some(point) => point,
None => return,
};
renderer.move_to(first_point.x, first_point.y);
for point in iter {
renderer.line_to(point.x, point.y);
}
draw(&context.fill, &context.stroke, renderer);
}
}
impl Render for Image {
fn render(&self, context: DefinedCoreShapeContext, renderer: &mut dyn Renderer) {
// TODO: what about pattern, and fill color? Do we do something with that?
renderer.show_image(
&self.path,
context.bounds.left,
context.bounds.top,
context.bounds.width,
context.bounds.height,
);
}
}
|
