From 11d98ad9fafc79cf6ef92ef1e7659d62e54d4269 Mon Sep 17 00:00:00 2001
From: Daniel Schadt <kingdread@gmx.de>
Date: Sun, 8 Dec 2019 03:35:47 +0100
Subject: center skills in output image

---
 src/render.rs | 40 +++++++++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 11 deletions(-)

(limited to 'src')

diff --git a/src/render.rs b/src/render.rs
index 1b15c1c..126fbea 100644
--- a/src/render.rs
+++ b/src/render.rs
@@ -22,6 +22,13 @@ quick_error! {
     }
 }
 
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum Alignment {
+    Left,
+    Center,
+    Right,
+}
+
 #[derive(Debug, Clone)]
 pub struct RenderOptions {
     skill_size: u32,
@@ -40,6 +47,7 @@ pub struct RenderOptions {
     background_color: Rgba<u8>,
     render_specialization_names: bool,
     skill_offset: u32,
+    skill_alignment: Alignment,
 }
 
 impl Default for RenderOptions {
@@ -62,6 +70,7 @@ impl Default for RenderOptions {
             background_color: Rgba([0, 0, 0, 0]),
             render_specialization_names: true,
             skill_offset: 30,
+            skill_alignment: Alignment::Center,
         }
     }
 }
@@ -277,17 +286,17 @@ impl<'r> Renderer<'r> {
         self.merge_parts(&images)
     }
 
-    fn construct_parts(&mut self, build: &BuildTemplate) -> Result<Vec<RgbaImage>, RenderError> {
-        let mut images: Vec<RgbaImage> = Vec::new();
+    fn construct_parts(&mut self, build: &BuildTemplate) -> Result<Vec<(Alignment, RgbaImage)>, RenderError> {
+        let mut images: Vec<(Alignment, RgbaImage)> = Vec::new();
 
         for traitline in build.traitlines().iter().filter(|x| x.is_some()) {
             let traitline = traitline.as_ref().unwrap();
             if self.options.render_specialization_names {
                 let header = self.render_specialization_name(&traitline.0)?;
-                images.push(header);
+                images.push((Alignment::Left, header));
             }
             let inner = self.render_traitline(&traitline)?;
-            images.push(inner);
+            images.push((Alignment::Left, inner));
         }
 
         let needs_space = build.skill_count() > 0 && build.traitline_count() > 0;
@@ -297,25 +306,30 @@ impl<'r> Renderer<'r> {
                 self.options.skill_offset,
                 self.options.background_color,
             );
-            images.push(separator);
+            images.push((Alignment::Left, separator));
         }
 
         if build.skill_count() > 0 {
             let skills = self.render_skills(build.skills())?;
-            images.push(skills);
+            images.push((self.options.skill_alignment, skills));
         }
 
         Ok(images)
     }
 
-    fn merge_parts(&mut self, images: &[RgbaImage]) -> Result<RgbaImage, RenderError> {
-        let width = images.iter().map(RgbaImage::width).max().unwrap();
-        let height = images.iter().map(RgbaImage::height).sum();
+    fn merge_parts(&mut self, images: &[(Alignment, RgbaImage)]) -> Result<RgbaImage, RenderError> {
+        let width = images.iter().map(snd).map(RgbaImage::width).max().unwrap();
+        let height = images.iter().map(snd).map(RgbaImage::height).sum();
         let mut buffer = ImageBuffer::from_pixel(width, height, self.options.background_color);
         let mut pos_y = 0;
 
-        for image in images {
-            imageops::overlay(&mut buffer, image, 0, pos_y);
+        for (alignment, image) in images {
+            let pos_x = match alignment {
+                Alignment::Left => 0,
+                Alignment::Center => (width - image.width()) / 2,
+                Alignment::Right => width - image.width(),
+            };
+            imageops::overlay(&mut buffer, image, pos_x, pos_y);
             pos_y += image.height();
         }
 
@@ -323,6 +337,10 @@ impl<'r> Renderer<'r> {
     }
 }
 
+fn snd<A, B>(input: &(A, B)) -> &B {
+    &input.1
+}
+
 fn with_mask<I, J>(input: &I, mask: &J) -> RgbaImage
 where
     I: GenericImage<Pixel = Rgba<u8>>,
-- 
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