From 255872d012b779708b26dfd732ded369d1de28fa Mon Sep 17 00:00:00 2001
From: hyvvs <hyvvs@proton.me>
Date: Wed, 4 Nov 2026 04:26:05 +0100
Subject: [PATCH] fix(libcairo): report native subsurface type

---
 core/libs/prx/libcairo/Surface.cpp    | 6 ++++--
 core/libs/tests/GuestCairoSurface.cpp | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/core/libs/prx/libcairo/Surface.cpp b/core/libs/prx/libcairo/Surface.cpp
index 5700249c1f..2e3dd3e2be 100644
--- a/core/libs/prx/libcairo/Surface.cpp
+++ b/core/libs/prx/libcairo/Surface.cpp
@@ -19,6 +19,7 @@ constexpr int kColor = 0x1000;
 constexpr int kAlpha = 0x2000;
 constexpr int kColorAlpha = 0x3000;
 constexpr int kImageSurfaceType = 0;
+constexpr int kSubsurfaceType = 23;
 constexpr int kInvalidFormatValue = -1;
 
 int BitsPerPixel(int format) {
@@ -231,8 +232,9 @@ int APS5_VABI cairo_surface_status(CairoSurface* surface) {
     return surface ? State(surface)->status : kNullPointer;
 }
 
-int APS5_VABI cairo_surface_get_type(CairoSurface*) {
-    return kImageSurfaceType;
+int APS5_VABI cairo_surface_get_type(CairoSurface* surface) {
+    return surface && State(surface)->status == kSuccess && !State(surface)->isImage
+               ? kSubsurfaceType : kImageSurfaceType;
 }
 
 int APS5_VABI cairo_surface_get_content(CairoSurface* surface) {
diff --git a/core/libs/tests/GuestCairoSurface.cpp b/core/libs/tests/GuestCairoSurface.cpp
index cae240d087..ec9d1082c7 100644
--- a/core/libs/tests/GuestCairoSurface.cpp
+++ b/core/libs/tests/GuestCairoSurface.cpp
@@ -185,7 +185,7 @@ void CheckSimilarAndSubsurfaces() {
     }
     CairoSurface* subsection = cairo_surface_create_for_rectangle(parent, 1.5, 2.5, 3.5, 4.5);
     assert(subsection && cairo_surface_status(subsection) == 0);
-    assert(cairo_surface_get_type(subsection) == 0);
+    assert(cairo_surface_get_type(subsection) == 23);
     assert(cairo_surface_get_content(subsection) == 0x3000);
     assert(cairo_image_surface_get_format(subsection) == -1);
     assert(cairo_image_surface_get_data(subsection) == nullptr);