From 378f3e9605514f76eab7a2177bdb222b2990aa1d Mon Sep 17 00:00:00 2001
From: TheShovel <68913917+TheShovel@users.noreply.github.com>
Date: Mon, 24 Jul 2023 01:10:33 +0300
Subject: [PATCH] TheShovel/CanvasEffects: add more effects (#747)

 - Sepia
 - Transparency
 - Scale
 - SkewX
 - SkewY
 - Offset X
 - Offset Y
 - Rotation
 - Border radius
---
 extensions/TheShovel/CanvasEffects.js | 74 +++++++++++++++++++++++++--
 1 file changed, 70 insertions(+), 4 deletions(-)

diff --git a/extensions/TheShovel/CanvasEffects.js b/extensions/TheShovel/CanvasEffects.js
index 4d53b09cc2..ed9c7552e0 100644
--- a/extensions/TheShovel/CanvasEffects.js
+++ b/extensions/TheShovel/CanvasEffects.js
@@ -7,21 +7,40 @@
     const canvas = Scratch.renderer.canvas;
 
     const updateStyle = () => {
-        const filter = `blur(${blur}px) contrast(${contrast / 100}) saturate(${saturation}%) hue-rotate(${color}deg) brightness(${brightness}%) invert(${invert}%)`;
+        // Gotta keep the translation to % because of the stage size, window size and so on
+        const transform = `rotate(${rotation}deg) scale(${scale}%) skew(${skewX}deg, ${skewY}deg) translate(${offsetX}%, ${0 - offsetY}%)`;
+        if (canvas.style.transform !== transform) {
+            canvas.style.transform = transform;
+        }
+        const filter = `blur(${blur}px) contrast(${contrast / 100}) saturate(${saturation}%) hue-rotate(${color}deg) brightness(${brightness}%) invert(${invert}%) sepia(${sepia}%) opacity(${100 - transparency}%)`;
         if (canvas.style.filter !== filter) {
             canvas.style.filter = filter;
         }
+        const cssBorderRadius = borderRadius === 0 ? '' : `${borderRadius}%`;
+        if (canvas.style.borderRadius !== cssBorderRadius) {
+            canvas.style.borderRadius = cssBorderRadius;
+        }
         const imageRendering = resizeMode === 'pixelated' ? 'pixelated' : '';
         if (canvas.style.imageRendering !== imageRendering) {
             canvas.style.imageRendering = imageRendering;
         }
     };
-    // scratch-gui will sometimes reset the cursor when resizing the window or going in/out of fullscreen
+    // scratch-gui may reset canvas styles when resizing the window or going in/out of fullscreen
     new MutationObserver(updateStyle).observe(canvas, {
       attributeFilter: ['style'],
       attributes: true
     });
 
+    let borderRadius = 0;
+    let rotation = 0;
+    let offsetY = 0;
+    let offsetX = 0;
+    let skewY = 0;
+    let skewX = 0;
+    let scale = 100;
+    // Thanks SharkPool for telling me about these
+    let transparency = 0;
+    let sepia = 0;
     let blur = 0;
     let contrast = 100;
     let saturation = 100;
@@ -96,7 +115,7 @@
                 menus: {
                     EFFECTMENU: {
                         acceptReporters: true,
-                        items: ['blur', 'contrast', 'saturation', 'color shift', 'brightness', 'invert']
+                        items: ['blur', 'contrast', 'saturation', 'color shift', 'brightness', 'invert', 'sepia', 'transparency', 'scale', 'skew X', 'skew Y', 'offset X', 'offset Y', 'rotation', 'border radius']
                     },
                     RENDERMODE: {
                         acceptReporters: true,
@@ -104,7 +123,8 @@
                     },
                     EFFECTGETMENU: {
                         acceptReporters: true,
-                        items: ['blur', 'contrast', 'saturation', 'color shift', 'brightness', 'invert', 'resize rendering mode']
+                        // this contains 'resize rendering mode', EFFECTMENU does not
+                        items: ['blur', 'contrast', 'saturation', 'color shift', 'brightness', 'invert', 'resize rendering mode', 'sepia', 'transparency', 'scale', 'skew X', 'skew Y', 'offset X', 'offset Y', 'rotation', 'border radius']
                     }
                 }
             };
@@ -124,10 +144,29 @@
                 return invert;
             } else if (EFFECT === 'resize rendering mode') {
                 return resizeMode;
+            } else if (EFFECT === 'sepia') {
+                return sepia;
+            } else if (EFFECT === 'transparency') {
+                return transparency;
+            } else if (EFFECT === 'scale') {
+                return scale;
+            } else if (EFFECT === 'skew X') {
+                return skewX;
+            } else if (EFFECT === 'skew Y') {
+                return skewY;
+            } else if (EFFECT === 'offset X') {
+                return offsetX;
+            } else if (EFFECT === 'offset Y') {
+                return offsetY;
+            } else if (EFFECT === 'rotation') {
+                return rotation;
+            } else if (EFFECT === 'border radius') {
+                return borderRadius;
             }
             return '';
         }
         seteffect({EFFECT, NUMBER}) {
+            NUMBER = Scratch.Cast.toNumber(NUMBER);
             if (EFFECT === 'blur') {
                 blur = NUMBER;
             } else if (EFFECT === 'contrast') {
@@ -140,10 +179,37 @@
                 brightness = NUMBER;
             } else if (EFFECT === 'invert') {
                 invert = NUMBER;
+            }  else if (EFFECT === 'sepia') {
+                sepia = NUMBER;
+            } else if (EFFECT === 'transparency') {
+                transparency = NUMBER;
+            } else if (EFFECT === 'scale') {
+                scale = NUMBER;
+            } else if (EFFECT === 'skew X') {
+                skewX = NUMBER;
+            } else if (EFFECT === 'skew Y') {
+                skewY = NUMBER;
+            } else if (EFFECT === 'offset X') {
+                offsetX = NUMBER;
+            } else if (EFFECT === 'offset Y') {
+                offsetY = NUMBER;
+            } else if (EFFECT === 'rotation') {
+                rotation = NUMBER;
+            } else if (EFFECT === 'border radius') {
+                borderRadius = NUMBER;
             }
             updateStyle();
         }
         cleareffects() {
+            borderRadius = 0;
+            rotation = 0;
+            offsetY = 0;
+            offsetX = 0;
+            skewY = 0;
+            skewX = 0;
+            scale = 100;
+            transparency = 0;
+            sepia = 0;
             blur = 0;
             contrast = 100;
             saturation = 100;