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|
use crate::opengl::currently_bound::CurrentlyBound;
use crate::vector::Vec2;
#[derive(Debug)]
pub struct Texture
{
texture: gl::types::GLuint,
}
impl Texture
{
pub fn new() -> Self
{
let mut texture = gl::types::GLuint::default();
unsafe {
gl::GenTextures(1, &mut texture);
};
Self { texture }
}
pub fn bind(&self, cb: impl FnOnce(CurrentlyBound<'_, Self>))
{
unsafe {
gl::BindTexture(gl::TEXTURE_2D, self.texture);
}
// SAFETY: The buffer object is bound above
let currently_bound = unsafe { CurrentlyBound::new() };
cb(currently_bound);
}
pub fn generate(
_: &CurrentlyBound<Self>,
dimens: &Vec2<u32>,
data: &[u8],
pixel_data_format: PixelDataFormat,
)
{
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TexImage2D(
gl::TEXTURE_2D,
0,
pixel_data_format.to_gl() as i32,
dimens.x as i32,
dimens.y as i32,
0,
pixel_data_format.to_gl(),
gl::UNSIGNED_BYTE,
data.as_ptr().cast(),
);
gl::GenerateMipmap(gl::TEXTURE_2D);
}
}
pub fn set_wrap(_: CurrentlyBound<Self>, wrapping: Wrapping)
{
let wrapping_gl = wrapping.to_gl();
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_S, wrapping_gl as i32);
gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_T, wrapping_gl as i32);
}
}
pub fn set_magnifying_filter(_: CurrentlyBound<Self>, filtering: Filtering)
{
let filtering_gl = filtering.to_gl();
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TexParameteri(
gl::TEXTURE_2D,
gl::TEXTURE_MAG_FILTER,
filtering_gl as i32,
);
}
}
pub fn set_minifying_filter(_: CurrentlyBound<Self>, filtering: Filtering)
{
let filtering_gl = filtering.to_gl();
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TexParameteri(
gl::TEXTURE_2D,
gl::TEXTURE_MIN_FILTER,
filtering_gl as i32,
);
}
}
}
impl Drop for Texture
{
fn drop(&mut self)
{
unsafe {
gl::DeleteTextures(1, &self.texture);
}
}
}
/// Texture wrapping.
#[derive(Debug, Clone, Copy)]
pub enum Wrapping
{
Repeat,
MirroredRepeat,
ClampToEdge,
ClampToBorder,
}
impl Wrapping
{
fn to_gl(self) -> gl::types::GLenum
{
match self {
Self::Repeat => gl::REPEAT,
Self::MirroredRepeat => gl::MIRRORED_REPEAT,
Self::ClampToEdge => gl::CLAMP_TO_EDGE,
Self::ClampToBorder => gl::CLAMP_TO_BORDER,
}
}
}
#[derive(Debug, Clone, Copy)]
pub enum Filtering
{
Nearest,
Linear,
}
impl Filtering
{
fn to_gl(self) -> gl::types::GLenum
{
match self {
Self::Linear => gl::LINEAR,
Self::Nearest => gl::NEAREST,
}
}
}
/// Texture pixel data format.
#[derive(Debug, Clone, Copy)]
pub enum PixelDataFormat
{
Rgb,
Rgba,
}
impl PixelDataFormat
{
fn to_gl(self) -> gl::types::GLenum
{
match self {
Self::Rgb => gl::RGB,
Self::Rgba => gl::RGBA,
}
}
}
|
