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egui-wgpu: correctly handle viewport rectangle for callbacks

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This is important for when a callback shape is inside a ScrollArea.
This commit is contained in:
Emil Ernerfeldt
2022-07-29 00:06:08 +02:00
parent 0571bf67e2
commit 09d636b089
4 changed files with 99 additions and 113 deletions
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13
egui_glow/src/painter.rs
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@@ -724,17 +724,18 @@ fn set_clip_rect(
let clip_max_x = pixels_per_point * clip_rect.max.x;
let clip_max_y = pixels_per_point * clip_rect.max.y;
// Make sure clip rect can fit within a `u32`:
let clip_min_x = clip_min_x.clamp(0.0, size_in_pixels.0 as f32);
let clip_min_y = clip_min_y.clamp(0.0, size_in_pixels.1 as f32);
let clip_max_x = clip_max_x.clamp(clip_min_x, size_in_pixels.0 as f32);
let clip_max_y = clip_max_y.clamp(clip_min_y, size_in_pixels.1 as f32);
// Round to integer:
let clip_min_x = clip_min_x.round() as i32;
let clip_min_y = clip_min_y.round() as i32;
let clip_max_x = clip_max_x.round() as i32;
let clip_max_y = clip_max_y.round() as i32;
// Clamp:
let clip_min_x = clip_min_x.clamp(0, size_in_pixels.0 as i32);
let clip_min_y = clip_min_y.clamp(0, size_in_pixels.1 as i32);
let clip_max_x = clip_max_x.clamp(clip_min_x, size_in_pixels.0 as i32);
let clip_max_y = clip_max_y.clamp(clip_min_y, size_in_pixels.1 as i32);
unsafe {
gl.scissor(
clip_min_x,