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webgl: Mark framebuffers as incomplete if attachments do not meet format requirements.

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This commit is contained in:
Josh Matthews 2018-08-15 13:14:39 -04:00
parent 03f6ce292e
commit 80ed829241
1 changed files with 19 additions and 5 deletions
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24
components/script/dom/webglframebuffer.rs
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@ -127,6 +127,12 @@ impl WebGLFramebuffer {
let has_s = s.is_some();
let has_zs = zs.is_some();
let attachments = [&*c, &*z, &*s, &*zs];
let attachment_constraints = [
&[constants::RGBA4, constants::RGB5_A1, constants::RGB565][..],
&[constants::DEPTH_COMPONENT16][..],
&[constants::STENCIL_INDEX8][..],
&[constants::DEPTH_STENCIL][..],
];
// From the WebGL spec, 6.6 ("Framebuffer Object Attachments"):
//
@ -148,17 +154,18 @@ impl WebGLFramebuffer {
}
let mut fb_size = None;
for attachment in &attachments {
for (attachment, constraints) in attachments.iter().zip(&attachment_constraints) {
// Get the size of this attachment.
let size = match **attachment {
let (format, size) = match **attachment {
Some(WebGLFramebufferAttachment::Renderbuffer(ref att_rb)) => {
att_rb.size()
(Some(att_rb.internal_format()), att_rb.size())
}
Some(WebGLFramebufferAttachment::Texture { texture: ref att_tex, level } ) => {
let info = att_tex.image_info_at_face(0, level as u32);
Some((info.width() as i32, info.height() as i32))
(info.data_type().map(|t| t.as_gl_constant()),
Some((info.width() as i32, info.height() as i32)))
}
None => None,
None => (None, None),
};
// Make sure that, if we've found any other attachment,
@ -171,6 +178,13 @@ impl WebGLFramebuffer {
fb_size = size;
}
}
if let Some(format) = format {
if constraints.iter().all(|c| *c != format) {
self.status.set(constants::FRAMEBUFFER_INCOMPLETE_ATTACHMENT);
return;
}
}
}
self.size.set(fb_size);