gl_lib 0.1.0

This package uses the gl_generator package and add some useful tools on top. An example is a textrenderer that used signed distance field. All the low level access is still avaiable
Documentation 
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//! Functions to generat and set textures

use crate::gl;
use image;


/// Wrapper of u32 as texture id
pub type TextureId = u32;

/// Generate an RGB texture using GL_CLAMP_TO_BORDER and GL_LINEAR
/// Return the texture id (u32)
pub fn gen_texture_rgb(gl: &gl::Gl, img: &image::RgbImage) -> TextureId {

    let mut id: gl::types::GLuint = 0;

    unsafe {
        gl.GenTextures(1, &mut id);

        gl.BindTexture(gl::TEXTURE_2D, id);

        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_S, gl::CLAMP_TO_BORDER as i32);
        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_T, gl::CLAMP_TO_BORDER as i32);

        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::LINEAR as i32);
        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::LINEAR as i32);

        gl.TexImage2D(gl::TEXTURE_2D, 0, gl::RGB as i32, img.width() as i32, img.height() as i32, 0, gl::RGB, gl::UNSIGNED_BYTE, img.as_ptr() as *const gl::types::GLvoid);
    }

    id
}

/// Generate an RGBA texture using GL_CLAMP_TO_BORDER and GL_LINEAR
/// Return the texture id (u32)
pub fn gen_texture_rgba(gl: &gl::Gl, img: &image::RgbaImage) -> TextureId {

    let mut id: gl::types::GLuint = 0;

    unsafe {
        gl.GenTextures(1, &mut id);

        gl.BindTexture(gl::TEXTURE_2D, id);

        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_S, gl::CLAMP_TO_BORDER as i32);
        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_T, gl::CLAMP_TO_BORDER as i32);

        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::LINEAR as i32);
        gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::LINEAR as i32);

        gl.TexImage2D(gl::TEXTURE_2D, 0, gl::RGBA as i32, img.width() as i32, img.height() as i32, 0, gl::RGBA, gl::UNSIGNED_BYTE, img.as_ptr() as *const gl::types::GLvoid);
    }

    id
}



/// Wrapper of BindTexture
pub fn set_texture(gl: &gl::Gl, texture_id: TextureId) {

    unsafe {
        gl.BindTexture(gl::TEXTURE_2D, texture_id);
    }
}