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|
use crate::data_types::dimens::Dimens;
#[derive(Debug)]
pub struct Texture
{
texture: gl::types::GLuint,
}
impl Texture
{
pub fn new() -> Self
{
let mut texture = gl::types::GLuint::default();
unsafe {
gl::CreateTextures(gl::TEXTURE_2D, 1, &mut texture);
};
Self { texture }
}
pub fn bind_to_texture_unit(&self, texture_unit: u32)
{
unsafe {
gl::BindTextureUnit(texture_unit, self.texture);
}
}
pub fn generate(
&mut self,
dimens: Dimens<u32>,
data: &[u8],
pixel_data_format: PixelDataFormat,
)
{
self.alloc_image(pixel_data_format, dimens, data);
unsafe {
gl::GenerateTextureMipmap(self.texture);
}
}
pub fn set_wrap(&mut self, wrapping: Wrapping)
{
let wrapping_gl = wrapping as gl::types::GLenum;
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TextureParameteri(self.texture, gl::TEXTURE_WRAP_S, wrapping_gl as i32);
gl::TextureParameteri(self.texture, gl::TEXTURE_WRAP_T, wrapping_gl as i32);
}
}
pub fn set_magnifying_filter(&mut self, filtering: Filtering)
{
let filtering_gl = filtering as gl::types::GLenum;
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TextureParameteri(
self.texture,
gl::TEXTURE_MAG_FILTER,
filtering_gl as i32,
);
}
}
pub fn set_minifying_filter(&mut self, filtering: Filtering)
{
let filtering_gl = filtering as gl::types::GLenum;
#[allow(clippy::cast_possible_wrap)]
unsafe {
gl::TextureParameteri(
self.texture,
gl::TEXTURE_MIN_FILTER,
filtering_gl as i32,
);
}
}
fn alloc_image(
&mut self,
pixel_data_format: PixelDataFormat,
dimens: Dimens<u32>,
data: &[u8],
)
{
unsafe {
#[allow(clippy::cast_possible_wrap)]
gl::TextureStorage2D(
self.texture,
1,
pixel_data_format.to_sized_internal_format(),
dimens.width as i32,
dimens.height as i32,
);
#[allow(clippy::cast_possible_wrap)]
gl::TextureSubImage2D(
self.texture,
0,
0,
0,
dimens.width as i32,
dimens.height as i32,
pixel_data_format.to_format(),
gl::UNSIGNED_BYTE,
data.as_ptr().cast(),
);
}
}
}
impl Drop for Texture
{
fn drop(&mut self)
{
unsafe {
gl::DeleteTextures(1, &self.texture);
}
}
}
/// Texture wrapping.
#[derive(Debug, Clone, Copy)]
#[repr(u32)]
pub enum Wrapping
{
Repeat = gl::REPEAT,
MirroredRepeat = gl::MIRRORED_REPEAT,
ClampToEdge = gl::CLAMP_TO_EDGE,
ClampToBorder = gl::CLAMP_TO_BORDER,
}
#[derive(Debug, Clone, Copy)]
#[repr(u32)]
pub enum Filtering
{
Nearest = gl::NEAREST,
Linear = gl::LINEAR,
}
/// Texture pixel data format.
#[derive(Debug, Clone, Copy)]
pub enum PixelDataFormat
{
Rgb8,
Rgba8,
}
impl PixelDataFormat
{
fn to_sized_internal_format(self) -> gl::types::GLenum
{
match self {
Self::Rgb8 => gl::RGB8,
Self::Rgba8 => gl::RGBA8,
}
}
fn to_format(self) -> gl::types::GLenum
{
match self {
Self::Rgb8 => gl::RGB,
Self::Rgba8 => gl::RGBA,
}
}
}
|
