diff --git a/thirdparty/README.md b/thirdparty/README.md
index 1872e7ac36d..169a3be5391 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -944,7 +944,7 @@ Patches:
 ## thorvg
 
 - Upstream: https://github.com/thorvg/thorvg
-- Version: 0.15.10 (bca94d244c67f573c6eddc27d783d9a6b1ef2f1b, 2025)
+- Version: 0.15.11 (61360cf6db0a05a8dd2ebdcc44d4cbbc315692ec, 2025)
 - License: MIT
 
 Files extracted from upstream source:
diff --git a/thirdparty/thorvg/inc/config.h b/thirdparty/thorvg/inc/config.h
index b2b1cb6be57..5bf2913d726 100644
--- a/thirdparty/thorvg/inc/config.h
+++ b/thirdparty/thorvg/inc/config.h
@@ -15,5 +15,5 @@
 // For internal debugging:
 //#define THORVG_LOG_ENABLED
 
-#define THORVG_VERSION_STRING "0.15.10"
+#define THORVG_VERSION_STRING "0.15.11"
 #endif
diff --git a/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp b/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp
index b5e90e7b404..44f610e1537 100644
--- a/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp
+++ b/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp
@@ -3382,6 +3382,7 @@ static void _svgLoaderParserXmlOpen(SvgLoaderData* loader, const char* content,
         if (node->type != SvgNodeType::Defs || !empty) {
             loader->stack.push(node);
         }
+        loader->latestGradient = nullptr;
     } else if ((method = _findGraphicsFactory(tagName))) {
         if (loader->stack.count > 0) parent = loader->stack.last();
         else parent = loader->doc;
@@ -3392,6 +3393,7 @@ static void _svgLoaderParserXmlOpen(SvgLoaderData* loader, const char* content,
             loader->stack.push(defs);
             loader->currentGraphicsNode = node;
         }
+        loader->latestGradient = nullptr;
     } else if ((gradientMethod = _findGradientFactory(tagName))) {
         SvgStyleGradient* gradient;
         gradient = gradientMethod(loader, attrs, attrsLength);
@@ -3417,8 +3419,9 @@ static void _svgLoaderParserXmlOpen(SvgLoaderData* loader, const char* content,
         loader->svgParse->flags = SvgStopStyleFlags::StopDefault;
         simpleXmlParseAttributes(attrs, attrsLength, _attrParseStops, loader);
         loader->latestGradient->stops.push(loader->svgParse->gradStop);
-    } else if (!isIgnoreUnsupportedLogElements(tagName)) {
-        TVGLOG("SVG", "Unsupported elements used [Elements: %s]", tagName);
+    } else {
+        loader->latestGradient = nullptr;
+        if (!isIgnoreUnsupportedLogElements(tagName)) TVGLOG("SVG", "Unsupported elements used [Elements: %s]", tagName);
     }
 }
 
diff --git a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwCommon.h b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwCommon.h
index a45a996ad91..53c28049813 100644
--- a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwCommon.h
+++ b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwCommon.h
@@ -448,9 +448,9 @@ static inline uint32_t opBlendColorDodge(uint32_t s, uint32_t d, TVG_UNUSED uint
 {
     // d / (1 - s)
     s = 0xffffffff - s;
-    auto c1 = (C1(s) == 0) ? C1(d) : std::min(C1(d) * 255 / C1(s), 255);
-    auto c2 = (C2(s) == 0) ? C2(d) : std::min(C2(d) * 255 / C2(s), 255);
-    auto c3 = (C3(s) == 0) ? C3(d) : std::min(C3(d) * 255 / C3(s), 255);
+    auto c1 = C1(d) == 0 ? 0 : (C1(s) == 0 ? 255 : std::min(C1(d) * 255 / C1(s), 255));
+    auto c2 = C2(d) == 0 ? 0 : (C2(s) == 0 ? 255 : std::min(C2(d) * 255 / C2(s), 255));
+    auto c3 = C3(d) == 0 ? 0 : (C3(s) == 0 ? 255 : std::min(C3(d) * 255 / C3(s), 255));
     return JOIN(255, c1, c2, c3);
 }
 
@@ -458,9 +458,9 @@ static inline uint32_t opBlendColorBurn(uint32_t s, uint32_t d, TVG_UNUSED uint8
 {
     // 1 - (1 - d) / s
     auto id = 0xffffffff - d;
-    auto c1 = (C1(s) == 0) ? C1(d) : 255 - std::min(C1(id) * 255 / C1(s), 255);
-    auto c2 = (C2(s) == 0) ? C2(d) : 255 - std::min(C2(id) * 255 / C2(s), 255);
-    auto c3 = (C3(s) == 0) ? C3(d) : 255 - std::min(C3(id) * 255 / C3(s), 255);
+    auto c1 = C1(d) == 255 ? 255 : (C1(s) == 0 ? 0 : 255 - std::min(C1(id) * 255 / C1(s), 255));
+    auto c2 = C2(d) == 255 ? 255 : (C2(s) == 0 ? 0 : 255 - std::min(C2(id) * 255 / C2(s), 255));
+    auto c3 = C3(d) == 255 ? 255 : (C3(s) == 0 ? 0 : 255 - std::min(C3(id) * 255 / C3(s), 255));
 
     return JOIN(255, c1, c2, c3);
 }
diff --git a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwPostEffect.cpp b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwPostEffect.cpp
index 4be40c885dc..fe311ef3454 100644
--- a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwPostEffect.cpp
+++ b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwPostEffect.cpp
@@ -266,10 +266,10 @@ static void _dropShadowFilter(uint32_t* dst, uint32_t* src, int stride, int w, i
 }
 
 
-static void _dropShadowShift(uint32_t* dst, uint32_t* src, int stride, SwBBox& region, SwPoint& offset, uint8_t opacity, bool direct)
+static void _dropShadowShift(uint32_t* dst, uint32_t* src, int dstride, int sstride, SwBBox& region, SwPoint& offset, uint8_t opacity, bool direct)
 {
-    src += (region.min.y * stride + region.min.x);
-    dst += (region.min.y * stride + region.min.x);
+    src += (region.min.y * sstride + region.min.x);
+    dst += (region.min.y * dstride + region.min.x);
 
     auto w = region.max.x - region.min.x;
     auto h = region.max.y - region.min.y;
@@ -279,14 +279,14 @@ static void _dropShadowShift(uint32_t* dst, uint32_t* src, int stride, SwBBox& r
     if (region.min.x + offset.x < 0) src -= offset.x;
     else dst += offset.x;
 
-    if (region.min.y + offset.y < 0) src -= (offset.y * stride);
-    else dst += (offset.y * stride);
+    if (region.min.y + offset.y < 0) src -= (offset.y * sstride);
+    else dst += (offset.y * dstride);
 
     for (auto y = 0; y < h; ++y) {
         if (translucent) rasterTranslucentPixel32(dst, src, w, opacity);
         else rasterPixel32(dst, src, w, opacity);
-        src += stride;
-        dst += stride;
+        src += sstride;
+        dst += dstride;
     }
 }
 
@@ -389,14 +389,14 @@ bool effectDropShadow(SwCompositor* cmp, SwSurface* surface[2], const RenderEffe
 
     //draw to the main surface directly
     if (direct) {
-        _dropShadowShift(cmp->recoverSfc->buf32, cmp->image.buf32, stride, bbox, data->offset, opacity, direct);
+        _dropShadowShift(cmp->recoverSfc->buf32, cmp->image.buf32, cmp->recoverSfc->stride, stride, bbox, data->offset, opacity, direct);
         std::swap(cmp->image.buf32, buffer[0]->buf32);
         return true;
     }
 
     //draw to the intermediate surface
     rasterClear(surface[1], bbox.min.x, bbox.min.y, w, h);
-    _dropShadowShift(buffer[1]->buf32, cmp->image.buf32, stride, bbox, data->offset, opacity, direct);
+    _dropShadowShift(buffer[1]->buf32, cmp->image.buf32, stride, stride, bbox, data->offset, opacity, direct);
     std::swap(cmp->image.buf32, buffer[1]->buf32);
 
     //compositing shadow and body
diff --git a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRaster.cpp b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRaster.cpp
index cce97cffb3c..5e29d2e23af 100644
--- a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRaster.cpp
+++ b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRaster.cpp
@@ -1813,7 +1813,7 @@ bool rasterConvertCS(RenderSurface* surface, ColorSpace to)
 //TODO: SIMD OPTIMIZATION?
 void rasterXYFlip(uint32_t* src, uint32_t* dst, int32_t stride, int32_t w, int32_t h, const SwBBox& bbox, bool flipped)
 {
-    constexpr int BLOCK = 8;  //experimental decision
+    constexpr int32_t BLOCK = 8;  //experimental decision
 
     if (flipped) {
         src += ((bbox.min.x * stride) + bbox.min.y);
@@ -1824,16 +1824,16 @@ void rasterXYFlip(uint32_t* src, uint32_t* dst, int32_t stride, int32_t w, int32
     }
 
     #pragma omp parallel for
-    for (int x = 0; x < w; x += BLOCK) {
+    for (int32_t x = 0; x < w; x += BLOCK) {
         auto bx = std::min(w, x + BLOCK) - x;
         auto in = &src[x];
         auto out = &dst[x * stride];
-        for (int y = 0; y < h; y += BLOCK) {
+        for (int32_t y = 0; y < h; y += BLOCK) {
             auto p = &in[y * stride];
             auto q = &out[y];
             auto by = std::min(h, y + BLOCK) - y;
-            for (int xx = 0; xx < bx; ++xx) {
-                for (int yy = 0; yy < by; ++yy) {
+            for (int32_t xx = 0; xx < bx; ++xx) {
+                for (int32_t yy = 0; yy < by; ++yy) {
                     *q = *p;
                     p += stride;
                     ++q;
diff --git a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRenderer.cpp b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRenderer.cpp
index 5b9719d2bc7..c70fdcfa1ac 100644
--- a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRenderer.cpp
+++ b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRenderer.cpp
@@ -121,8 +121,7 @@ struct SwShapeTask : SwTask
         auto visibleFill = false;
 
         //This checks also for the case, if the invisible shape turned to visible by alpha.
-        auto prepareShape = false;
-        if (!shapePrepared(&shape) && (flags & RenderUpdateFlag::Color)) prepareShape = true;
+        auto prepareShape = !shapePrepared(&shape) && flags & (RenderUpdateFlag::Color | RenderUpdateFlag::Gradient);
 
         //Shape
         if (flags & (RenderUpdateFlag::Path | RenderUpdateFlag::Transform) || prepareShape) {
@@ -186,6 +185,7 @@ struct SwShapeTask : SwTask
     err:
         bbox.reset();
         shapeReset(&shape);
+        rleReset(shape.strokeRle);
         shapeDelOutline(&shape, mpool, tid);
     }
 
diff --git a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRle.cpp b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRle.cpp
index cd9f40485ca..8290927aa6e 100644
--- a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRle.cpp
+++ b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwRle.cpp
@@ -482,7 +482,7 @@ static bool _setCell(RleWorker& rw, SwPoint pos)
 static bool _startCell(RleWorker& rw, SwPoint pos)
 {
     if (pos.x > rw.cellMax.x) pos.x = rw.cellMax.x;
-    if (pos.x < rw.cellMin.x) pos.x = rw.cellMin.x;
+    if (pos.x < rw.cellMin.x) pos.x = rw.cellMin.x - 1;
 
     rw.area = 0;
     rw.cover = 0;
@@ -866,6 +866,8 @@ void _replaceClipSpan(SwRle *rle, SwSpan* clippedSpans, uint32_t size)
 
 SwRle* rleRender(SwRle* rle, const SwOutline* outline, const SwBBox& renderRegion, bool antiAlias)
 {
+    if (!outline) return nullptr;
+
     constexpr auto RENDER_POOL_SIZE = 16384L;
     constexpr auto BAND_SIZE = 40;
 
diff --git a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwShape.cpp b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwShape.cpp
index 4408db0b86f..ce46b582848 100644
--- a/thirdparty/thorvg/src/renderer/sw_engine/tvgSwShape.cpp
+++ b/thirdparty/thorvg/src/renderer/sw_engine/tvgSwShape.cpp
@@ -543,7 +543,6 @@ void shapeDelOutline(SwShape* shape, SwMpool* mpool, uint32_t tid)
 void shapeReset(SwShape* shape)
 {
     rleReset(shape->rle);
-    rleReset(shape->strokeRle);
     shape->fastTrack = false;
     shape->bbox.reset();
 }
diff --git a/thirdparty/thorvg/src/renderer/tvgLoader.cpp b/thirdparty/thorvg/src/renderer/tvgLoader.cpp
index e69fb678a3a..333c9bf6cf7 100644
--- a/thirdparty/thorvg/src/renderer/tvgLoader.cpp
+++ b/thirdparty/thorvg/src/renderer/tvgLoader.cpp
@@ -267,7 +267,11 @@ bool LoaderMgr::term()
     auto loader = _activeLoaders.head;
 
     //clean up the remained font loaders which is globally used.
-    while (loader && loader->type == FileType::Ttf) {
+    while (loader) {
+        if (loader->type != FileType::Ttf) {
+            loader = loader->next;
+            continue;
+        }
         auto ret = loader->close();
         auto tmp = loader;
         loader = loader->next;
diff --git a/thirdparty/thorvg/src/renderer/tvgText.cpp b/thirdparty/thorvg/src/renderer/tvgText.cpp
index a09bb302e57..2b2aea316e1 100644
--- a/thirdparty/thorvg/src/renderer/tvgText.cpp
+++ b/thirdparty/thorvg/src/renderer/tvgText.cpp
@@ -62,7 +62,11 @@ Result Text::load(const std::string& path) noexcept
 {
 #ifdef THORVG_FILE_IO_SUPPORT
     bool invalid; //invalid path
-    if (!LoaderMgr::loader(path, &invalid)) {
+    auto loader = LoaderMgr::loader(path, &invalid);
+    if (loader) {
+        if (loader->sharing > 0) --loader->sharing;   //font loading doesn't mean sharing.
+        return Result::Success;
+    } else {
         if (invalid) return Result::InvalidArguments;
         else return Result::NonSupport;
     }
diff --git a/thirdparty/thorvg/update-thorvg.sh b/thirdparty/thorvg/update-thorvg.sh
index cd36e1626ee..10ed335461d 100755
--- a/thirdparty/thorvg/update-thorvg.sh
+++ b/thirdparty/thorvg/update-thorvg.sh
@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
-VERSION=0.15.10
+VERSION=0.15.11
 # Uncomment and set a git hash to use specific commit instead of tag.
 #GIT_COMMIT=