50 lines
1.8 KiB
Rust
50 lines
1.8 KiB
Rust
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use hcie_engine_api::{Engine, BrushTip, BrushStyle};
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#[test]
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fn bitmap_brush_stamp_shape() {
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let mut engine = Engine::new(64, 64);
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// 4x4 solid white square bitmap stamp
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let mut pixels = vec![0u8; 16];
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for i in 0..16 { pixels[i] = 255; }
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let brush = BrushTip {
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style: BrushStyle::Bitmap,
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size: 8.0,
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opacity: 1.0,
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hardness: 1.0,
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spacing: 1.0,
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bitmap_pixels: pixels,
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bitmap_w: 4,
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bitmap_h: 4,
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..Default::default()
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};
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engine.set_brush_tip(brush);
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engine.begin_stroke(engine.active_layer_id(), 20.0, 20.0);
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engine.stroke_to(engine.active_layer_id(), 20.0, 20.0, 1.0);
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engine.end_stroke(engine.active_layer_id());
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let output = engine.get_composite_pixels();
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// Check that the painted area is roughly 4x4, not a circular blob.
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// Count alpha > 0 pixels and bounding box.
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let mut min_x = 63; let mut max_x = 0; let mut min_y = 63; let mut max_y = 0;
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let mut count = 0;
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for y in 0..64 {
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for x in 0..64 {
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let a = output[(y*64+x)*4+3];
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if a > 0 {
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count += 1;
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if x < min_x { min_x = x; }
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if x > max_x { max_x = x; }
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if y < min_y { min_y = y; }
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if y > max_y { max_y = y; }
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}
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}
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}
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let w = (max_x - min_x + 1) as i32;
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let h = (max_y - min_y + 1) as i32;
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// Should fit inside ~8x8 because size=8 and stamp 4x4 scaled up
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assert!(w <= 8 && h <= 8, "bitmap dab bounding box {}x{} too large for 4x4 stamp", w, h);
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assert!(count >= 8, "bitmap dab should paint some pixels");
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// Square-ish: aspect ratio not too far from 1 (was very low for circle vs square?)
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assert!(w.abs_diff(h) <= 2, "bitmap dab bounding box should be roughly square, got {}x{}", w, h);
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}
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