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
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
//! Image Layer Test
//!
//! Tests the rendering order of images vs primitives (paths, backgrounds).
//! This helps debug z-order issues where images may render above/below other elements.
//!
//! **Solution for rendering elements ON TOP of images:**
//! Use `.foreground()` on any element that needs to render above images.
//! The render order is: Background primitives → Images → Foreground primitives
//!
//! Run with: cargo run -p blinc_app --example image_layer_test --features windowed
use blinc_app::prelude::*;
use blinc_app::windowed::{WindowedApp, WindowedContext};
fn main() -> Result<()> {
tracing_subscriber::fmt()
.with_max_level(tracing::Level::INFO)
.init();
let config = WindowConfig {
title: "Image Layer Test".to_string(),
width: 800,
height: 600,
resizable: true,
..Default::default()
};
WindowedApp::run(config, |ctx| build_ui(ctx))
}
fn build_ui(_ctx: &WindowedContext) -> impl ElementBuilder {
let image_path = "crates/blinc_app/examples/assets/avatar.jpg";
div()
.w_full()
.h_full()
.bg(Color::rgb(0.1, 0.1, 0.15))
.flex_col()
.gap(8.0)
.p(20.0)
.child(
text("Image Layer Test - Testing image vs primitive z-order")
.size(24.0)
.weight(FontWeight::Bold)
.color(Color::WHITE),
)
.child(
div()
.flex_row()
.gap(16.0)
.child(test_case_1(image_path))
.child(test_case_2(image_path))
.child(test_case_3(image_path))
.child(test_case_4(image_path)),
)
.child(
div()
.flex_row()
.gap(16.0)
.child(test_case_5(image_path))
.child(test_case_6(image_path))
.child(test_border_no_image()),
)
}
/// Test: Border without image - verify border works in general
fn test_border_no_image() -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(
text("7: Border test (small circles)")
.size(14.0)
.color(Color::WHITE),
)
.child(
div()
.flex_row()
.gap(8.0)
.items_end()
// Tiny 6px circle - like avatar status indicator
// Normal (no foreground)
.child(
div()
.w(6.0)
.h(6.0)
.bg(Color::GREEN)
.border(1.0, Color::WHITE)
.rounded(3.0),
)
// Tiny 6px - .foreground()
.child(
div()
.w(6.0)
.h(6.0)
.bg(Color::GREEN)
.border(1.0, Color::WHITE)
.rounded(3.0)
.foreground(),
)
// 10px circle - medium size
.child(
div()
.w(10.0)
.h(10.0)
.bg(Color::GREEN)
.border(1.0, Color::WHITE)
.rounded(5.0),
)
// 10px - .foreground()
.child(
div()
.w(10.0)
.h(10.0)
.bg(Color::GREEN)
.border(1.0, Color::WHITE)
.rounded(5.0)
.foreground(),
)
// 30px circle - larger
.child(
div()
.w(30.0)
.h(30.0)
.bg(Color::GREEN)
.border(2.0, Color::WHITE)
.rounded(15.0),
)
// 30px - .foreground()
.child(
div()
.w(30.0)
.h(30.0)
.bg(Color::GREEN)
.border(2.0, Color::WHITE)
.rounded(15.0)
.foreground(),
),
)
.child(
text("Pairs: 6px, 10px, 30px - normal vs .foreground()")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}
/// Test 1: Image with border directly on img()
fn test_case_1(src: &str) -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(text("1: Border on img()").size(14.0).color(Color::WHITE))
.child(
img(src)
.size(100.0, 100.0)
.cover()
.rounded(12.0)
.border(4.0, Color::RED),
)
.child(
text("Red border directly on image")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}
/// Test 2: Image with sibling overlay using .foreground()
fn test_case_2(src: &str) -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(
text("2: Sibling + .foreground()")
.size(14.0)
.color(Color::WHITE),
)
.child(
div()
.w(100.0)
.h(100.0)
.relative()
.child(img(src).size(100.0, 100.0).cover())
.child(
div()
.w(30.0)
.h(30.0)
.bg(Color::GREEN)
.rounded(15.0)
.absolute()
.bottom(4.0)
.right(4.0)
.foreground(), // Required for sibling overlay on images
),
)
.child(
text("Green circle ON TOP (uses .foreground())")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}
/// Test 3: Image with sibling overlay div using foreground layer + border
fn test_case_3(src: &str) -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(
text("3: .foreground() + border")
.size(14.0)
.color(Color::WHITE),
)
.child(
div()
.w(100.0)
.h(100.0)
.relative()
.child(img(src).size(100.0, 100.0).cover())
.child(
div()
.w(30.0)
.h(30.0)
.bg(Color::GREEN)
.border(2.0, Color::WHITE)
.rounded(15.0)
.absolute()
.bottom(4.0)
.right(4.0)
.foreground(), // Use foreground layer
),
)
.child(
text("Green circle + white border, on TOP")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}
/// Test 4: Stack with image first, overlay second
fn test_case_4(src: &str) -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(
text("4: Stack (image first)")
.size(14.0)
.color(Color::WHITE),
)
.child(
stack()
.w(100.0)
.h(100.0)
.child(img(src).size(100.0, 100.0).cover())
.child(
div()
.w(30.0)
.h(30.0)
.bg(Color::YELLOW)
.rounded(15.0)
.absolute()
.bottom(4.0)
.right(4.0),
),
)
.child(
text("Yellow circle should be ON TOP (stack order)")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}
/// Test 5: Plain div background under image
fn test_case_5(src: &str) -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(text("5: Bg div under image").size(14.0).color(Color::WHITE))
.child(
div()
.w(100.0)
.h(100.0)
.bg(Color::MAGENTA)
.rounded(8.0)
.flex_row()
.items_center()
.justify_center()
.child(img(src).size(80.0, 80.0).cover().rounded(8.0)),
)
.child(
text("Magenta bg should show as border around image")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}
/// Test 6: Text over image (wrapped in div for positioning)
fn test_case_6(src: &str) -> impl ElementBuilder {
div()
.flex_col()
.gap(4.0)
.child(text("6: Text over image").size(14.0).color(Color::WHITE))
.child(
div()
.w(100.0)
.h(100.0)
.relative()
.child(img(src).size(100.0, 100.0).cover().rounded(8.0))
.child(
div().absolute().bottom(8.0).left(8.0).child(
text("HELLO")
.size(16.0)
.weight(FontWeight::Bold)
.color(Color::WHITE),
),
),
)
.child(
text("Text should appear ON TOP of image")
.size(11.0)
.color(Color::rgba(1.0, 1.0, 1.0, 0.6)),
)
}