From 53e5f25c34977e5f2cad40bb20d735bb077657d4 Mon Sep 17 00:00:00 2001
From: JohannJEG <125712359+JohannJEG@users.noreply.github.com>
Date: Fri, 23 Aug 2024 05:04:19 -0400
Subject: [PATCH] Clear the screen before drawing, to avoid problems with image
 sources with transparency.

---
 src/filter/mirr0r/mirr0r.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/filter/mirr0r/mirr0r.cpp b/src/filter/mirr0r/mirr0r.cpp
index abad27e..555bb1b 100755
--- a/src/filter/mirr0r/mirr0r.cpp
+++ b/src/filter/mirr0r/mirr0r.cpp
@@ -53,6 +53,14 @@ class Mirr0r : public frei0r::filter {
 
     }
 
+    void clearScreen(cairo_t* cr, int width, int height) {
+        cairo_save (cr);
+        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
+        cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+        cairo_paint (cr);
+        cairo_restore (cr);
+    }
+
     virtual void update(double time, uint32_t* out, const uint32_t* in) {
         
         int w = this->width;
@@ -71,6 +79,9 @@ class Mirr0r : public frei0r::filter {
         // Create a Cairo drawing context for the destination surface
         cairo_t *cr = cairo_create(dest_image);
 
+        // Clear the screen
+        clearScreen(cr, w, h);
+
         // Create a Cairo surface for the source image
         cairo_surface_t *image = cairo_image_surface_create_for_data((unsigned char*)in,
                                                                     CAIRO_FORMAT_ARGB32,