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simplified webgl example

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This commit is contained in:
ibaryshnikov 2019-03-10 17:40:02 +03:00
parent 8db85dddde
commit daad58f9b3
1 changed files with 9 additions and 8 deletions
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17
examples/webgl/src/lib.rs
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@ -33,7 +33,7 @@ pub fn start() -> Result<(), JsValue> {
}
"#,
)?;
let program = link_program(&context, [vert_shader, frag_shader].iter())?;
let program = link_program(&context, &vert_shader, &frag_shader)?;
context.use_program(Some(&program));
let vertices: [f32; 9] = [-0.7, -0.7, 0.0, 0.7, -0.7, 0.0, 0.0, 0.7, 0.0];
@ -85,20 +85,21 @@ pub fn compile_shader(
} else {
Err(context
.get_shader_info_log(&shader)
.unwrap_or_else(|| "Unknown error creating shader".into()))
.unwrap_or_else(|| String::from("Unknown error creating shader")))
}
}
pub fn link_program<'a, T: IntoIterator<Item = &'a WebGlShader>>(
pub fn link_program(
context: &WebGlRenderingContext,
shaders: T,
vert_shader: &WebGlShader,
frag_shader: &WebGlShader,
) -> Result<WebGlProgram, String> {
let program = context
.create_program()
.ok_or_else(|| String::from("Unable to create shader object"))?;
for shader in shaders {
context.attach_shader(&program, shader)
}
context.attach_shader(&program, vert_shader);
context.attach_shader(&program, frag_shader);
context.link_program(&program);
if context
@ -110,6 +111,6 @@ pub fn link_program<'a, T: IntoIterator<Item = &'a WebGlShader>>(
} else {
Err(context
.get_program_info_log(&program)
.unwrap_or_else(|| "Unknown error creating program object".into()))
.unwrap_or_else(|| String::from("Unknown error creating program object")))
}
}