presets: initial structs for representing presets

.gitignore

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+/src/target/

src/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

src/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/src.iml" filepath="$PROJECT_DIR$/.idea/src.iml" />
+    </modules>
+  </component>
+</project>

src/.idea/src.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="CPP_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/librashader-presets/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

src/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "librashader-presets"
+version = "0.1.0"

src/librashader-presets/src/lib.rs

@@ -1,14 +1,3 @@
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
+mod preset;
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}
+pub use preset::*;

src/librashader-presets/src/preset.rs

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+use std::collections::HashSet;
+use std::convert::Infallible;
+use std::path::PathBuf;
+use std::str::FromStr;
+
+#[repr(C)]
+pub enum FilterMode {
+    Linear,
+    Nearest,
+    Unspecified
+}
+
+#[repr(C)]
+pub enum WrapMode {
+    ClampToBorder,
+    ClampToEdge,
+    Repeat,
+    MirroredRepeat,
+}
+
+#[repr(C)]
+pub enum ScaleType {
+    Input,
+    Absolute,
+    Viewport
+}
+
+impl FromStr for WrapMode {
+    type Err = Infallible;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "clamp_to_border" => WrapMode::ClampToBorder,
+            "clamp_to_edge" => WrapMode::ClampToEdge,
+            "repeat" => WrapMode::Repeat,
+            "mirrored_repeat" => WrapMode::MirroredRepeat,
+            _ => WrapMode::ClampToBorder
+        })
+    }
+}
+
+impl FromStr for ScaleType {
+    type Err = Infallible;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "source" => ScaleType::Input,
+            "viewport" => ScaleType::Viewport,
+            "absolute" => ScaleType::Absolute,
+            _ => ScaleType::Input
+        })
+    }
+}
+
+pub enum ScaleFactor {
+    Float(f32),
+    Absolute(i32)
+}
+
+pub struct Scaling {
+    pub scale_type: ScaleType,
+    pub factor: ScaleFactor
+}
+
+pub struct Scale2D {
+    pub x: Scaling,
+    pub y: Scaling
+}
+
+pub struct ShaderConfig {
+    pub name: String,
+    pub alias: String,
+    pub filter: FilterMode,
+    pub wrap_mode: WrapMode,
+    pub frame_count_mod: usize,
+    pub srgb_framebuffer: bool,
+    pub float_framebuffer: bool,
+    pub mipmap_input: bool,
+    pub scaling: Scale2D
+}
+
+pub struct TextureConfig {
+    pub name: String,
+    pub path: PathBuf,
+    pub wrap_mode: WrapMode,
+    pub filter: FilterMode,
+    pub mipmap: bool
+}
+
+pub struct Parameter {
+    pub name: String,
+    pub value: f32,
+}
+
+pub struct Preset {
+    // Everything is in Vecs because the expect number of values is well below 64.
+    pub shaders: Vec<ShaderConfig>,
+    pub textures: Vec<TextureConfig>,
+    pub parameters: Vec<Parameter>
+}