Function push_ui_mesh

perro_source/render_stack/perro_graphics/src/ui/gpu.rs:895–916

(
    meshes: &mut Vec<UiMeshGpu>,
    index_start: u32,
    index_count: u32,
    clip_rect: [u32; 4],
    texture_id: TextureId,
)

        }
        if let Some(new_capacity) = self
            .shrink_indices
            .tick(self.index_capacity_bytes as usize, UI_MIN_INDEX_BYTES)
        {
            let new_capacity = align_buffer_bytes(new_capacity);
            if let Some(buffer) = self.index_buffer.take() {
                self.index_buffer = Some(shrink_buffer_preserving(
                    device,
                    queue,
                    &buffer,
                    "perro_ui_indices",
                    new_capacity as u64,
                    wgpu::BufferUsages::INDEX
                        | wgpu::BufferUsages::COPY_DST
                        | wgpu::BufferUsages::COPY_SRC,
                ));
            }
            self.index_capacity_bytes = new_capacity as u64;
            self.indices
                .shrink_to(new_capacity / std::mem::size_of::<u32>());
        }
        if self.used_since_shrink_tick {
            self.used_since_shrink_tick = false;
            self.supersample_idle_ticks = 0;
            return;
        }