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Backend should respect idx and vtx offsets given by ImGui #110

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Backend should respect idx and vtx offsets given by ImGui #110

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6 changes: 2 additions & 4 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -701,8 +701,6 @@ impl Renderer {
clip_scale: [f32; 2],
(vertex_base, index_base): (i32, u32),
) -> RendererResult<()> {
let mut start = index_base;

for cmd in draw_list.commands() {
if let Elements { count, cmd_params } = cmd {
let clip_rect = [
Expand All @@ -721,6 +719,7 @@ impl Renderer {
rpass.set_bind_group(1, &tex.bind_group, &[]);

// Set scissors on the renderpass.
let start = index_base + cmd_params.idx_offset as u32;
let end = start + count as u32;
if clip_rect[0] < fb_size[0]
&& clip_rect[1] < fb_size[1]
Expand All @@ -747,13 +746,12 @@ impl Renderer {
rpass.set_scissor_rect(scissors.0, scissors.1, scissors.2, scissors.3);

// Draw the current batch of vertices with the renderpass.
rpass.draw_indexed(start..end, vertex_base, 0..1);
rpass.draw_indexed(start..end, vertex_base + cmd_params.vtx_offset as i32, 0..1);
}
}

// Increment the index regardless of whether or not this batch
// of vertices was drawn.
start = end;
}
}
Ok(())
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