Draft triangle pipeline in iced_glow

glow/src/program.rs

@@ -0,0 +1,39 @@
+use glow::HasContext;
+
+pub unsafe fn create(
+    gl: &glow::Context,
+    shader_sources: &[(u32, &str)],
+) -> <glow::Context as HasContext>::Program {
+    let program = gl.create_program().expect("Cannot create program");
+
+    let mut shaders = Vec::with_capacity(shader_sources.len());
+
+    for (shader_type, shader_source) in shader_sources.iter() {
+        let shader = gl
+            .create_shader(*shader_type)
+            .expect("Cannot create shader");
+
+        gl.shader_source(shader, shader_source);
+        gl.compile_shader(shader);
+
+        if !gl.get_shader_compile_status(shader) {
+            panic!(gl.get_shader_info_log(shader));
+        }
+
+        gl.attach_shader(program, shader);
+
+        shaders.push(shader);
+    }
+
+    gl.link_program(program);
+    if !gl.get_program_link_status(program) {
+        panic!(gl.get_program_info_log(program));
+    }
+
+    for shader in shaders {
+        gl.detach_shader(program, shader);
+        gl.delete_shader(shader);
+    }
+
+    program
+}