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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
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
177
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
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
247
248
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
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
use std::hash::Hash;
use std::ptr;
use std::mem;
use std::ops::{Deref, DerefMut};
use winapi::{FLOAT, D2D1_RECT_F, D2D1_ROUNDED_RECT, D2D1_ELLIPSE, D2D1_POINT_2F,
D2D1_MATRIX_3X2_F, ID2D1Brush, ID2D1StrokeStyle};
use error::Error;
use defs::{Rectangle, Ellipse};
use super::{Canvas, CanvasProtected, CanvasResources};
pub struct CanvasRenderer<'a, ID: Clone+Hash+'a> {
canvas: &'a mut Canvas<ID>
}
impl<'a, ID: Clone+Hash> CanvasRenderer<'a, ID> {
pub fn clear(&mut self, r:f32, g:f32, b: f32, a: f32) {
use winapi::D2D1_COLOR_F;
let color = D2D1_COLOR_F{r:r, g:g, b:b, a:a};
unsafe{ self.Clear(&color); }
}
pub fn get_render_size(&mut self) -> (f32, f32) {
use winapi::D2D1_SIZE_F;
let mut render_size = D2D1_SIZE_F{width: 0.0, height: 0.0};
unsafe{ self.GetSize(&mut render_size); }
(render_size.width as f32, render_size.height as f32)
}
pub fn set_transform(&mut self, m: &[[FLOAT; 2]; 3]) {
unsafe{ self.SetTransform( &D2D1_MATRIX_3X2_F{ matrix: *m } ); }
}
pub fn get_transform(&mut self) -> [[FLOAT; 2]; 3] {
unsafe{
let mut m: D2D1_MATRIX_3X2_F = mem::uninitialized();
self.GetTransform( &mut m );
m.matrix
}
}
pub fn fill_rectangle(&mut self, brush: &ID, r: &Rectangle) -> Result<(), Error> {
let rect = D2D1_RECT_F{left: r.left, top: r.top, bottom: r.bottom, right: r.right};
let brush = match self.fill_setup(brush) {
Ok(d) => d,
Err(e) => { return Err(e); }
};
unsafe{ self.FillRectangle(&rect, mem::transmute(brush) ) };
Ok(())
}
pub fn fill_rounded_rectangle(&mut self, brush: &ID, r: &Rectangle, radius: (f32, f32)) -> Result<(), Error> {
let rect = D2D1_RECT_F{left: r.left, top: r.top, bottom: r.bottom, right: r.right};
let rect = D2D1_ROUNDED_RECT{ rect: rect, radiusX: radius.0, radiusY: radius.1 };
let brush = match self.fill_setup(brush) {
Ok(d) => d,
Err(e) => { return Err(e); }
};
unsafe{ self.FillRoundedRectangle(&rect, mem::transmute(brush)); }
Ok(())
}
pub fn fill_ellipse(&mut self, brush: &ID, e: &Ellipse) -> Result<(), Error> {
let ellipse = D2D1_ELLIPSE{point: D2D1_POINT_2F{ x: e.center.0, y: e.center.1 } , radiusX: e.radius.0, radiusY: e.radius.1};
let brush = match self.fill_setup(brush) {
Ok(d) => d,
Err(e) => { return Err(e); }
};
unsafe{ self.FillEllipse(&ellipse, mem::transmute(brush)); }
Ok(())
}
pub fn draw_rectangle(&mut self, brush: &ID, pen: Option<&ID>, r: &Rectangle, width: f32) -> Result<(), Error> {
let rect = D2D1_RECT_F{left: r.left, top: r.top, bottom: r.bottom, right: r.right};
let (brush, pen) = match self.draw_setup(brush, pen) {
Ok(d) => d,
Err(e) => { return Err(e); }
};
unsafe{ self.DrawRectangle(&rect, mem::transmute(brush), width, mem::transmute(pen)); }
Ok(())
}
pub fn draw_rounded_rectangle(&mut self, brush: &ID, pen: Option<&ID>, r: &Rectangle, width: f32, radius: (f32, f32)) -> Result<(), Error> {
let rect = D2D1_RECT_F{left: r.left, top: r.top, bottom: r.bottom, right: r.right};
let rect = D2D1_ROUNDED_RECT{ rect: rect, radiusX: radius.0, radiusY: radius.1 };
let (brush, pen) = match self.draw_setup(brush, pen) {
Ok(d) => d,
Err(e) => { return Err(e); }
};
unsafe{ self.DrawRoundedRectangle(&rect, mem::transmute(brush), width, mem::transmute(pen)); }
Ok(())
}
pub fn draw_ellipse(&mut self, brush: &ID, pen: Option<&ID>, e: &Ellipse, width: f32) -> Result<(), Error> {
let ellipse = D2D1_ELLIPSE{point: D2D1_POINT_2F{ x: e.center.0, y: e.center.1 } , radiusX: e.radius.0, radiusY: e.radius.1};
let (brush, pen) = match self.draw_setup(brush, pen) {
Ok(d) => d,
Err(e) => { return Err(e); }
};
unsafe{ self.DrawEllipse(&ellipse, mem::transmute(brush), width, mem::transmute(pen)); }
Ok(())
}
fn fill_setup(&mut self, brush: &ID) -> Result<*mut ID2D1Brush, Error> {
match self.get_resource(brush) {
Ok(brush) => match brush {
CanvasResources::SolidBrush(b) => unsafe{ Ok(mem::transmute(b)) },
CanvasResources::StrokeStyle(_) => Err(Error::BadResource("Resource of type brush required, got Brush.".to_string()))
},
Err(e) => Err(e)
}
}
fn draw_setup(&mut self, brush: &ID, pen: Option<&ID>) -> Result<(*mut ID2D1Brush, *mut ID2D1StrokeStyle), Error> {
let brush = match self.get_resource(brush) {
Ok(brush) => match brush {
CanvasResources::SolidBrush(b) => b,
CanvasResources::StrokeStyle(_) => { return Err(Error::BadResource("Resource of type brush required, got Pen.".to_string())); }
},
Err(e) => { return Err(e); }
};
let pen = match pen {
Some(pen) => match self.get_resource(pen) {
Ok(pen) => match pen {
CanvasResources::StrokeStyle(s) => { s },
CanvasResources::SolidBrush(_) => { return Err(Error::BadResource("Resource of type pen required, got Brush.".to_string())); },
},
Err(e) => { return Err(e); }
},
None => ptr::null_mut()
};
unsafe{ Ok(( mem::transmute(brush), pen)) }
}
}
impl<'a, ID: Clone+Hash> Deref for CanvasRenderer<'a, ID> {
type Target = Canvas<ID>;
#[inline(always)] fn deref(&self) -> &Canvas<ID> { &self.canvas }
}
impl<'a, ID: Clone+Hash> DerefMut for CanvasRenderer<'a, ID> {
#[inline(always)]fn deref_mut(&mut self) -> &mut Canvas<ID> { &mut self.canvas }
}
impl<'a, ID: Clone+Hash> Drop for CanvasRenderer<'a, ID> {
fn drop(&mut self) {
unsafe{
use winapi::D2DERR_RECREATE_TARGET;
let recreate = self.EndDraw(ptr::null_mut(), ptr::null_mut()) == D2DERR_RECREATE_TARGET;
self.canvas.set_must_recreate_target(recreate);
}
}
}
pub trait RendererProtected<'a, ID: Clone+Hash> {
fn prepare(canvas: &'a mut Canvas<ID>) -> Result<CanvasRenderer<'a, ID>, Error>;
}
impl<'a, ID: Clone+Hash> RendererProtected<'a, ID> for CanvasRenderer<'a, ID> {
fn prepare(canvas: &'a mut Canvas<ID>) -> Result<CanvasRenderer<'a, ID>, Error> {
unsafe{
if canvas.get_must_recreate_target() {
if let Err(e) = canvas.rebuild() {
return Err(Error::System(e));
}
}
let identity = D2D1_MATRIX_3X2_F {
matrix: [[1.0, 0.0],
[0.0, 1.0],
[0.0, 0.0]]
};
canvas.BeginDraw();
canvas.SetTransform(&identity);
}
Ok( CanvasRenderer { canvas: canvas } )
}
}