intern/ghost/intern/GHOST_System.hh

@@ -62,6 +62,8 @@ class GHOST_System : public GHOST_ISystem {
    */
   virtual uint64_t getMilliSeconds() const;
 
+  
+
   /**
    * Installs a timer.
    *

intern/ghost/intern/GHOST_SystemCocoa.hh

@@ -116,6 +116,13 @@ class GHOST_SystemCocoa : public GHOST_System {
    */
   GHOST_IWindow *getWindowUnderCursor(int32_t x, int32_t y);
 
+  /**
+   * Get the color of the pixel at the current mouse cursor location
+   * \param r_color: returned sRGB float colors
+   * \return Success value (true == successful and supported by platform)
+   */
+  GHOST_TSuccess getPixelAtCursor(float r_color[3]) const;
+
   /***************************************************************************************
    * Event management functionality
    ***************************************************************************************/

intern/ghost/intern/GHOST_SystemCocoa.mm

@@ -821,6 +821,49 @@ GHOST_IWindow *GHOST_SystemCocoa::getWindowUnderCursor(int32_t x, int32_t y)
   return m_windowManager->getWindowAssociatedWithOSWindow((void *)nswindow);
 }
 
+GHOST_TSuccess GHOST_SystemCocoa::getPixelAtCursor(float r_color[3]) const 
+{
+    @autoreleasepool {
+        CGPoint cursorPosition = CGEventGetLocation(CGEventCreate(NULL));
+        
+        cursorPosition.y = mainScreen().frame.y - cursorPosition.y + 20; 
+
+        // Create rect to get color at location
+        CGRect rect = CGRectMake(cursorPosition.x, cursorPosition.y, 1, 1);
+
+        // Create Image from rect
+        CGImageRef image = CGDisplayCreateImageForRect(CGMainDisplayID(), rect);
+        if (image == nil) {
+            return GHOST_kFailure;
+        }
+
+        // Create bitmap from image & free it
+        NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc] initWithCGImage:image];
+        if (bitmap == nil) {
+            return GHOST_kFailure;
+        }
+        CGImageRelease(image);
+    
+        // Get color from bitmap
+        NSColor *color = [bitmap colorAtX:0 y:0];
+    
+        if (color == nil) {
+            return GHOST_kFailure;
+        }
+    
+        CGFloat red, green, blue, alpha;
+        [color getRed:&red green:&green blue:&blue alpha:&alpha];
+    
+        r_color[0] = (float)red;
+        r_color[1] = (float)green;
+        r_color[2] = (float)blue;
+    
+        [bitmap release];
+
+        return GHOST_kSuccess; 
+    }
+}
+
 /**
  * \note returns coordinates in Cocoa screen coordinates.
  */
@@ -921,8 +964,6 @@ GHOST_TCapabilityFlag GHOST_SystemCocoa::getCapabilities() const
       ~(
           /* Cocoa has no support for a primary selection clipboard. */
           GHOST_kCapabilityPrimaryClipboard |
-          /* Cocoa has no support for sampling colors from the desktop. */
-          GHOST_kCapabilityDesktopSample |
           /* This Cocoa back-end has not yet implemented image copy/paste. */
           GHOST_kCapabilityClipboardImages));
 }

intern/ghost/intern/GHOST_SystemWayland.cc

@@ -1,3 +1,4 @@
+#include "GHOST_SystemWayland.hh"
 /* SPDX-FileCopyrightText: 2020-2023 Blender Authors
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
@@ -6286,6 +6287,12 @@ GHOST_TSuccess GHOST_SystemWayland::setCursorPosition(const int32_t x, const int
   return GHOST_kFailure;
 }
 
+GHOST_TSuccess GHOST_SystemWayland::getPixelAtCursor(float r_color[3]) const
+{
+  wl_display *wlDisplay = display_->wl.display;
+  
+}
+
 void GHOST_SystemWayland::getMainDisplayDimensions(uint32_t &width, uint32_t &height) const
 {
 #ifdef USE_EVENT_BACKGROUND_THREAD