Fix watermarks

processing/pipeline.go

@@ -3,7 +3,6 @@ package processing
 import (
 	"context"
 
-	"github.com/imgproxy/imgproxy/v3/auximageprovider"
 	"github.com/imgproxy/imgproxy/v3/imagedata"
 	"github.com/imgproxy/imgproxy/v3/options"
 	"github.com/imgproxy/imgproxy/v3/security"
@@ -27,9 +26,6 @@ type Context struct {
 	// Original image data
 	ImgData imagedata.ImageData
 
-	// The watermark image provider, if any watermarking is to be done.
-	WatermarkProvider auximageprovider.Provider
-
 	SrcWidth  int
 	SrcHeight int
 	Angle     int

processing/watermark.go

@@ -212,7 +212,7 @@ func (p *Processor) applyWatermark(
 }
 
 func (p *Processor) watermark(c *Context) error {
-	if c.WatermarkProvider == nil || c.PO.WatermarkOpacity() == 0 {
+	if p.watermarkProvider == nil || c.PO.WatermarkOpacity() == 0 {
 		return nil
 	}