Add DomElement::render

sammycage · Aug 4, 2024 · be40aed · be40aed
1 parent 438ca4e
commit be40aed
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Showing 2 changed files with 26 additions and 5 deletions.
diff --git a/include/lunasvg.h b/include/lunasvg.h
@@ -216,7 +216,21 @@ class LUNASVG_API DomElement {
      */
     Element* get() { return m_element; }
 
-	Bitmap renderToBitmap(std::uint32_t width, std::uint32_t height, std::uint32_t backgroundColor = 0x00000000) const;
+    /**
+     * @brief Renders the document to a bitmap
+     * @param matrix - the current transformation matrix
+     * @param bitmap - target image on which the content will be drawn
+     */
+    void render(Bitmap bitmap, const Matrix& matrix = Matrix{}) const;
+
+    /**
+     * @brief renderToBitmap
+     * @param width
+     * @param height
+     * @param backgroundColor
+     * @return
+     */
+    Bitmap renderToBitmap(std::uint32_t width, std::uint32_t height, std::uint32_t backgroundColor = 0x00000000) const;
 
 private:
     Element* m_element = nullptr;

diff --git a/source/lunasvg.cpp b/source/lunasvg.cpp
@@ -344,6 +344,16 @@ Matrix DomElement::getAbsoluteTransform() const
     return transform;
 }
 
+void DomElement::render(Bitmap bitmap, const Matrix& matrix) const
+{
+    if(m_element == nullptr || !m_element->box())
+        return;
+    RenderState state(nullptr, RenderMode::Display);
+    state.canvas = Canvas::create(bitmap.data(), bitmap.width(), bitmap.height(), bitmap.stride());
+    state.transform = Transform(matrix);
+    m_element->box()->render(state);
+}
+
 Bitmap DomElement::renderToBitmap(std::uint32_t width, std::uint32_t height, std::uint32_t backgroundColor) const
 {
     if(m_element == nullptr || !m_element->box())
@@ -366,10 +376,7 @@ Bitmap DomElement::renderToBitmap(std::uint32_t width, std::uint32_t height, std
     Matrix matrix(xScale, 0, 0, yScale, -elementBounds.x * xScale, -elementBounds.y * yScale);
     Bitmap bitmap(width, height);
     bitmap.clear(backgroundColor);
-    RenderState state(nullptr, RenderMode::Display);
-    state.canvas = Canvas::create(bitmap.data(), bitmap.width(), bitmap.height(), bitmap.stride());
-    state.transform = Transform(matrix);
-    m_element->box()->render(state);
+    render(bitmap, matrix);
     return bitmap;
 }