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test(render): cover inherited form resource contexts (#707)

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cyfung1031
2026-10-10 06:03:36 -04:00
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parent d84d6c859a
commit 18e5db5e6d
1 changed files with 35 additions and 0 deletions
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crates/render/src/raster.rs
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@@ -1951,6 +1951,41 @@ trailer << /Root 1 0 R >>
}
}
#[test]
fn shared_form_xobject_uses_each_pages_resource_context() {
let form = "/CS1 cs 0.5 0.5 0.5 sc 10 10 30 30 re f";
let page_content = "/F Do";
let pdf = format!(
"%PDF-1.7\n\
1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj\n\
2 0 obj << /Type /Pages /Kids [3 0 R 6 0 R] /Count 2 /MediaBox [0 0 50 50] >> endobj\n\
3 0 obj << /Type /Page /Parent 2 0 R /Resources << /XObject << /F 4 0 R >> /ColorSpace << /CS1 /DeviceRGB >> >> /Contents 5 0 R >> endobj\n\
4 0 obj << /Type /XObject /Subtype /Form /BBox [0 0 50 50] /Length {} >> stream\n{form}\nendstream endobj\n\
5 0 obj << /Length {} >> stream\n{page_content}\nendstream endobj\n\
6 0 obj << /Type /Page /Parent 2 0 R /Resources << /XObject << /F 4 0 R >> /ColorSpace << /CS1 [/CalRGB << /WhitePoint [0.9505 1 1.089] /Gamma [2 2 2] /Matrix [1 0 0 0 1 0 0 0 1] >>] >> >> /Contents 7 0 R >> endobj\n\
7 0 obj << /Length {} >> stream\n{page_content}\nendstream endobj\n\
trailer << /Root 1 0 R >>\n%%EOF",
form.len(),
page_content.len(),
page_content.len()
)
.into_bytes();
let mut renderer = PageRenderer::new(Arc::new(pdf), RenderConfig::default());
let first = renderer.render(RenderRequest { page: 0, scale: 1.0, ..Default::default() });
let second = renderer.render(RenderRequest { page: 1, scale: 1.0, ..Default::default() });
assert!(first.error.is_none() && second.error.is_none(), "{:?} / {:?}", first.error, second.error);
let pixel = |page: &RenderedPage| {
let offset = ((20 * page.width + 20) * 4) as usize;
[page.rgba[offset], page.rgba[offset + 1], page.rgba[offset + 2], page.rgba[offset + 3]]
};
let first_pixel = pixel(&first);
let second_pixel = pixel(&second);
assert_ne!(first_pixel, second_pixel, "the same Form XObject must resolve /CS1 in each page's resources");
assert_ne!(first_pixel, [255, 255, 255, 255]);
assert_ne!(second_pixel, [255, 255, 255, 255]);
}
#[test]
fn renders_a_blue_rectangle() {
let pool = RenderPool::new(Arc::new(ONE_PAGE.to_vec()), 1, RenderConfig::default());