91 lines
2.8 KiB
Rust
91 lines
2.8 KiB
Rust
use crate::error::Result;
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use crate::framebuffer::GLImage;
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use crate::gl::LoadLut;
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use crate::texture::InputTexture;
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use gl::types::{GLsizei, GLuint};
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use librashader_common::map::FastHashMap;
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use librashader_presets::TextureConfig;
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use librashader_runtime::image::{Image, ImageError, UVDirection};
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use librashader_runtime::scaling::MipmapSize;
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use rayon::prelude::*;
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pub struct Gl46LutLoad;
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impl LoadLut for Gl46LutLoad {
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fn load_luts(textures: &[TextureConfig]) -> Result<FastHashMap<usize, InputTexture>> {
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let mut luts = FastHashMap::default();
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let pixel_unpack = unsafe {
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let mut binding = 0;
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gl::GetIntegerv(gl::PIXEL_UNPACK_BUFFER_BINDING, &mut binding);
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binding
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};
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unsafe {
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gl::BindBuffer(gl::PIXEL_UNPACK_BUFFER, 0);
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}
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let images = textures
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.par_iter()
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.map(|texture| Image::load(&texture.path, UVDirection::TopLeft))
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.collect::<std::result::Result<Vec<Image>, ImageError>>()?;
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for (index, (texture, image)) in textures.iter().zip(images).enumerate() {
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let levels = if texture.mipmap {
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image.size.calculate_miplevels()
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} else {
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1u32
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};
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let mut handle = 0;
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unsafe {
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gl::CreateTextures(gl::TEXTURE_2D, 1, &mut handle);
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gl::TextureStorage2D(
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handle,
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levels as GLsizei,
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gl::RGBA8,
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image.size.width as GLsizei,
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image.size.height as GLsizei,
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);
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gl::PixelStorei(gl::UNPACK_ROW_LENGTH, 0);
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gl::PixelStorei(gl::UNPACK_ALIGNMENT, 4);
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gl::TextureSubImage2D(
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handle,
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0,
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0,
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0,
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image.size.width as GLsizei,
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image.size.height as GLsizei,
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gl::RGBA,
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gl::UNSIGNED_BYTE,
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image.bytes.as_ptr().cast(),
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);
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let mipmap = levels > 1;
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if mipmap {
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gl::GenerateTextureMipmap(handle);
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}
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}
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luts.insert(
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index,
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InputTexture {
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image: GLImage {
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handle,
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format: gl::RGBA8,
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size: image.size,
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},
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filter: texture.filter_mode,
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mip_filter: texture.filter_mode,
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wrap_mode: texture.wrap_mode,
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},
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);
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}
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unsafe {
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gl::BindBuffer(gl::PIXEL_UNPACK_BUFFER, pixel_unpack as GLuint);
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};
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Ok(luts)
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}
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}
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