File gtk-414-2.patch of Package chromium.openSUSE_Backports_SLE-15-SP6_Update

commit cdc2a57272589f9522689500838e889b88b3f9d4
Author: Tom Anderson <thomasanderson@chromium.org>
Date:   Fri Nov 21 10:43:53 2025 -0800

    [GTK] Directly render header button icons
    
    The old code used GetTextureFromRenderNode which doesn't work for vector
    icons. The solution is to call gsk_render_node_draw() to directly render
    the icon.
    
    R=thestig
    
    Fixed: 448684006
    Change-Id: I3946297974bfdecde9c7b76d86bb9b82c32b9fe8
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7180182
    Reviewed-by: Lei Zhang <thestig@chromium.org>
    Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1548603}

diff --git a/ui/gtk/gsk.sigs b/ui/gtk/gsk.sigs
index 9dc03167830f4..59f87dce81b1c 100644
--- a/ui/gtk/gsk.sigs
+++ b/ui/gtk/gsk.sigs
@@ -17,4 +17,5 @@ GdkTexture* gsk_texture_node_get_texture(UI_GTK_CONST GskRenderNode* node);
 float gsk_opacity_node_get_opacity(const GskRenderNode* node);
 GskRenderNode* gsk_mask_node_get_mask(const GskRenderNode* node);
 GdkTexture* gsk_texture_scale_node_get_texture(const GskRenderNode* node);
-GskRenderNode* gsk_subsurface_node_get_child(const GskRenderNode* node);
\ No newline at end of file
+GskRenderNode* gsk_subsurface_node_get_child(const GskRenderNode* node);
+void gsk_render_node_draw(GskRenderNode* node, cairo_t* cr);
diff --git a/ui/gtk/gtk_util.cc b/ui/gtk/gtk_util.cc
index 0a2bd7bfb8927..be1a6d8569a1b 100644
--- a/ui/gtk/gtk_util.cc
+++ b/ui/gtk/gtk_util.cc
@@ -290,6 +290,15 @@ CairoSurface::CairoSurface(SkBitmap& bitmap)
           cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, bitmap.width()))),
       cairo_(cairo_create(surface_)) {}
 
+CairoSurface::CairoSurface(void* pixels, int width, int height)
+    : surface_(cairo_image_surface_create_for_data(
+          static_cast<unsigned char*>(pixels),
+          CAIRO_FORMAT_ARGB32,
+          width,
+          height,
+          cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width))),
+      cairo_(cairo_create(surface_)) {}
+
 CairoSurface::CairoSurface(const gfx::Size& size)
     : surface_(cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
                                           size.width(),
diff --git a/ui/gtk/gtk_util.h b/ui/gtk/gtk_util.h
index 0fbebedc6a61f..f2e9934c0bb66 100644
--- a/ui/gtk/gtk_util.h
+++ b/ui/gtk/gtk_util.h
@@ -61,6 +61,10 @@ class CairoSurface {
   // into it.  |bitmap| must outlive this CairoSurface.
   explicit CairoSurface(SkBitmap& bitmap);
 
+  // Attaches a cairo surface to a pointer to pixel data.  `pixels`
+  // must outlive this CairoSurface.
+  CairoSurface(void* pixels, int width, int height);
+
   // Creates a new cairo surface with the given size.  The memory for
   // this surface is deallocated when this CairoSurface is destroyed.
   explicit CairoSurface(const gfx::Size& size);
diff --git a/ui/gtk/nav_button_provider_gtk.cc b/ui/gtk/nav_button_provider_gtk.cc
index 527b9a0743a01..ae46e11dade2b 100644
--- a/ui/gtk/nav_button_provider_gtk.cc
+++ b/ui/gtk/nav_button_provider_gtk.cc
@@ -112,18 +112,22 @@ gfx::Size LoadNavButtonIcon(ui::NavButtonProvider::FrameButtonDisplayType type,
     auto* snapshot = gtk_snapshot_new();
     gdk_paintable_snapshot(paintable, snapshot, width, height);
     auto* node = gtk_snapshot_free_to_node(snapshot);
+
     size_t nbytes = width * height * sizeof(SkColor);
-    SkColor* pixels = reinterpret_cast<SkColor*>(g_malloc(nbytes));
+    void* pixels = g_malloc(nbytes);
     UNSAFE_TODO(memset(pixels, 0, nbytes));
     size_t stride = sizeof(SkColor) * width;
-    if (GdkTexture* texture = GetTextureFromRenderNode(node)) {
-      gdk_texture_download(texture, reinterpret_cast<guchar*>(pixels), stride);
-    }
+
+    CairoSurface surface(pixels, width, height);
+    cairo_t* cr = surface.cairo();
+    gsk_render_node_draw(node, cr);
+
     SkColor fg = GtkStyleContextGetColor(button_context);
-    for (int i = 0; i < width * height; ++i) {
-      UNSAFE_TODO(pixels[i]) =
-          SkColorSetA(fg, UNSAFE_TODO(SkColorGetA(pixels[i])));
-    }
+    cairo_set_source_rgba(cr, SkColorGetR(fg) / 255.0, SkColorGetG(fg) / 255.0,
+                          SkColorGetB(fg) / 255.0, SkColorGetA(fg) / 255.0);
+    cairo_set_operator(cr, CAIRO_OPERATOR_IN);
+    cairo_paint(cr);
+
     icon->texture = TakeGObject(
         gdk_memory_texture_new(width, height, GDK_MEMORY_B8G8R8A8,
                                g_bytes_new_take(pixels, nbytes), stride));