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Add Support for WebGL Transormfeedback

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Reference: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.15
This commit is contained in:
Istvan Miklos 2019-09-26 11:55:20 +02:00
parent a33d493a4f
commit 4f112b1705
17 changed files with 588 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

57
components/canvas/webgl_thread.rs
View file

@ -1180,6 +1180,41 @@ impl WebGLImpl {
WebGLCommand::GetRenderbufferParameter(target, pname, ref chan) => {
Self::get_renderbuffer_parameter(gl, target, pname, chan)
},
WebGLCommand::CreateTransformFeedback(ref sender) => {
let value = gl.gen_transform_feedbacks();
sender.send(value).unwrap()
},
WebGLCommand::DeleteTransformFeedback(id) => {
gl.delete_transform_feedbacks(id);
},
WebGLCommand::IsTransformFeedback(id, ref sender) => {
let value = gl.is_transform_feedback(id);
sender.send(value).unwrap()
},
WebGLCommand::BindTransformFeedback(target, id) => {
gl.bind_transform_feedback(target, id);
},
WebGLCommand::BeginTransformFeedback(mode) => {
gl.begin_transform_feedback(mode);
},
WebGLCommand::EndTransformFeedback() => {
gl.end_transform_feedback();
},
WebGLCommand::PauseTransformFeedback() => {
gl.pause_transform_feedback();
},
WebGLCommand::ResumeTransformFeedback() => {
gl.resume_transform_feedback();
},
WebGLCommand::GetTransformFeedbackVarying(program, index, ref sender) => {
let (size, ty, mut name) = gl.get_transform_feedback_varying(program.get(), index);
// We need to split, because the name starts with '_u' prefix.
name = name.split_off(2);
sender.send((size, ty, name)).unwrap();
},
WebGLCommand::TransformFeedbackVaryings(program, ref varyings, buffer_mode) => {
gl.transform_feedback_varyings(program.get(), varyings.as_slice(), buffer_mode);
},
WebGLCommand::GetFramebufferAttachmentParameter(
target,
attachment,
@ -1814,9 +1849,10 @@ impl WebGLImpl {
linked: false,
active_attribs: vec![].into(),
active_uniforms: vec![].into(),
transform_feedback_length: Default::default(),
transform_feedback_mode: Default::default(),
};
}
let mut num_active_attribs = [0];
unsafe {
gl.get_program_iv(
@ -1868,11 +1904,28 @@ impl WebGLImpl {
})
.collect::<Vec<_>>()
.into();
let mut transform_feedback_length = [0];
unsafe {
gl.get_program_iv(
program.get(),
gl::TRANSFORM_FEEDBACK_VARYINGS,
&mut transform_feedback_length,
);
}
let mut transform_feedback_mode = [0];
unsafe {
gl.get_program_iv(
program.get(),
gl::TRANSFORM_FEEDBACK_BUFFER_MODE,
&mut transform_feedback_mode,
);
}
ProgramLinkInfo {
linked: true,
active_attribs,
active_uniforms,
transform_feedback_length: transform_feedback_length[0],
transform_feedback_mode: transform_feedback_mode[0],
}
}