ThorVG: update to v0.11.0 release.

See https://github.com/thorvg/thorvg/releases/tag/v0.11.0

+ Infrastructure
    Repository folder structure was make it more intuitive and coherent.
        "thorvg/src/lib" -> "thorvg/src/common"
            (providing essential common functionalities
                used internally among the renderer and sub-modules)
        "thorvg/src/lib" -> "thorvg/src/renderer"
            (for vector drawing features)

+ SVG related
    Fix stroke regression https://github.com/thorvg/thorvg/issues/1670
    Support stroke dash offset function https://github.com/thorvg/thorvg/issues/1591#issuecomment-1681319321
    Support Focal property in Radial Gradient https://github.com/thorvg/thorvg/issues/1558

1 files changed, 146 insertions, 0 deletions

diff --git a/thirdparty/thorvg/src/renderer/tvgCanvas.h b/thirdparty/thorvg/src/renderer/tvgCanvas.h
new file mode 100644
index 0000000000..f893f9f7c0
--- /dev/null
+++ b/thirdparty/thorvg/src/renderer/tvgCanvas.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2020 - 2023 the ThorVG project. All rights reserved.
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _TVG_CANVAS_IMPL_H_
+#define _TVG_CANVAS_IMPL_H_
+
+#include "tvgPaint.h"
+
+/************************************************************************/
+/* Internal Class Implementation                                        */
+/************************************************************************/
+
+struct Canvas::Impl
+{
+    list<Paint*> paints;
+    RenderMethod* renderer;
+    bool refresh = false;   //if all paints should be updated by force.
+    bool drawing = false;   //on drawing condition?
+
+    Impl(RenderMethod* pRenderer):renderer(pRenderer)
+    {
+    }
+
+    ~Impl()
+    {
+        clear(true);
+        delete(renderer);
+    }
+
+    Result push(unique_ptr<Paint> paint)
+    {
+        //You can not push paints during rendering.
+        if (drawing) return Result::InsufficientCondition;
+
+        auto p = paint.release();
+        if (!p) return Result::MemoryCorruption;
+        PP(p)->ref();
+        paints.push_back(p);
+
+        return update(p, true);
+    }
+
+    Result clear(bool free)
+    {
+        //Clear render target before drawing
+        if (!renderer || !renderer->clear()) return Result::InsufficientCondition;
+
+        //Free paints
+        if (free) {
+            for (auto paint : paints) {
+                P(paint)->unref();
+                if (paint->pImpl->dispose(*renderer) && P(paint)->refCnt == 0) {
+                    delete(paint);
+                }
+            }
+            paints.clear();
+        }
+        drawing = false;
+
+        return Result::Success;
+    }
+
+    void needRefresh()
+    {
+        refresh = true;
+    }
+
+    Result update(Paint* paint, bool force)
+    {
+        if (paints.empty() || drawing || !renderer) return Result::InsufficientCondition;
+
+        Array<RenderData> clips;
+        auto flag = RenderUpdateFlag::None;
+        if (refresh || force) flag = RenderUpdateFlag::All;
+
+        //Update single paint node
+        if (paint) {
+            //Optimize Me: Can we skip the searching?
+            for (auto paint2 : paints) {
+                if (paint2 == paint) {
+                    paint->pImpl->update(*renderer, nullptr, clips, 255, flag);
+                    return Result::Success;
+                }
+            }
+            return Result::InvalidArguments;
+        //Update all retained paint nodes
+        } else {
+            for (auto paint : paints) {
+                paint->pImpl->update(*renderer, nullptr, clips, 255, flag);
+            }
+        }
+
+        refresh = false;
+
+        return Result::Success;
+    }
+
+    Result draw()
+    {
+        if (drawing || paints.empty() || !renderer || !renderer->preRender()) return Result::InsufficientCondition;
+
+        bool rendered = false;
+        for (auto paint : paints) {
+            if (paint->pImpl->render(*renderer)) rendered = true;
+        }
+
+        if (!rendered || !renderer->postRender()) return Result::InsufficientCondition;
+
+        drawing = true;
+
+        return Result::Success;
+    }
+
+    Result sync()
+    {
+        if (!drawing) return Result::InsufficientCondition;
+
+        if (renderer->sync()) {
+            drawing = false;
+            return Result::Success;
+        }
+
+        return Result::InsufficientCondition;
+    }
+};
+
+#endif /* _TVG_CANVAS_IMPL_H_ */