librashader/librashader-presets/src/preset.rs

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use crate::error::ParsePresetError;
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use librashader_common::{FilterMode, WrapMode};
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use std::ops::Mul;
use std::path::PathBuf;
use std::str::FromStr;
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/// The configuration for a single shader pass.
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#[derive(Debug, Clone)]
pub struct ShaderPassConfig {
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/// The index of the shader pass relative to its parent preset.
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pub id: i32,
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/// The path to the shader pass source file.
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pub name: PathBuf,
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/// The alias of the shader pass if available.
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pub alias: Option<String>,
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/// The filtering mode that this shader pass should expect.
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pub filter: FilterMode,
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/// The texture addressing (wrap) mode that this shader pass expects.
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pub wrap_mode: WrapMode,
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/// The number to which to wrap the frame count before passing it to the uniforms.
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pub frame_count_mod: u32,
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/// Whether or not this shader pass expects an SRGB framebuffer output.
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pub srgb_framebuffer: bool,
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/// Whether or not this shader pass expects an float framebuffer output.
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pub float_framebuffer: bool,
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/// Whether or not to generate mipm
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pub mipmap_input: bool,
pub scaling: Scale2D,
}
#[repr(i32)]
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#[derive(Default, Copy, Clone, Debug)]
pub enum ScaleType {
#[default]
Input = 0,
Absolute,
Viewport,
}
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#[derive(Copy, Clone, Debug)]
pub enum ScaleFactor {
Float(f32),
Absolute(i32),
}
impl Default for ScaleFactor {
fn default() -> Self {
ScaleFactor::Float(1.0f32)
}
}
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impl From<ScaleFactor> for f32 {
fn from(value: ScaleFactor) -> Self {
match value {
ScaleFactor::Float(f) => f,
ScaleFactor::Absolute(f) => f as f32,
}
}
}
impl Mul<ScaleFactor> for f32 {
type Output = f32;
fn mul(self, rhs: ScaleFactor) -> Self::Output {
match rhs {
ScaleFactor::Float(f) => f * self,
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ScaleFactor::Absolute(f) => f as f32 * self,
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}
}
}
impl Mul<ScaleFactor> for u32 {
type Output = f32;
fn mul(self, rhs: ScaleFactor) -> Self::Output {
match rhs {
ScaleFactor::Float(f) => f * self as f32,
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ScaleFactor::Absolute(f) => (f as u32 * self) as f32,
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}
}
}
impl FromStr for ScaleType {
type Err = ParsePresetError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"source" => Ok(ScaleType::Input),
"viewport" => Ok(ScaleType::Viewport),
"absolute" => Ok(ScaleType::Absolute),
_ => Err(ParsePresetError::InvalidScaleType(s.to_string())),
}
}
}
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#[derive(Debug, Clone)]
pub struct Scaling {
pub scale_type: ScaleType,
pub factor: ScaleFactor,
}
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#[derive(Debug, Clone)]
pub struct Scale2D {
pub valid: bool,
pub x: Scaling,
pub y: Scaling,
}
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#[derive(Debug, Clone)]
pub struct TextureConfig {
pub name: String,
pub path: PathBuf,
pub wrap_mode: WrapMode,
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pub filter_mode: FilterMode,
pub mipmap: bool,
}
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#[derive(Debug, Clone)]
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pub struct ParameterConfig {
pub name: String,
pub value: f32,
}
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#[derive(Debug, Clone)]
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pub struct ShaderPreset {
/// Used in legacy GLSL shader semantics. If < 0, no feedback pass is used.
/// Otherwise, the FBO after pass #N is passed a texture to next frame
#[cfg(feature = "parse_legacy_glsl")]
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pub feedback_pass: i32,
/// The number of shaders enabled in the filter chain.
pub shader_count: i32,
// Everything is in Vecs because the expect number of values is well below 64.
/// Preset information for each shader.
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pub shaders: Vec<ShaderPassConfig>,
/// Preset information for each texture.
pub textures: Vec<TextureConfig>,
/// Preset information for each user parameter.
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pub parameters: Vec<ParameterConfig>,
}