--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DPF-Prymula-audioplugins/dpf/dgl/Cairo.hpp	Mon Oct 16 21:53:34 2023 +0200
@@ -0,0 +1,193 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any purpose with
+ * or without fee is hereby granted, provided that the above copyright notice and this
+ * permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
+ * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef DGL_CAIRO_HPP_INCLUDED
+#define DGL_CAIRO_HPP_INCLUDED
+
+#include "ImageBase.hpp"
+#include "ImageBaseWidgets.hpp"
+
+#include <cairo.h>
+
+START_NAMESPACE_DGL
+
+// --------------------------------------------------------------------------------------------------------------------
+
+/**
+   Cairo Graphics context.
+ */
+struct CairoGraphicsContext : GraphicsContext
+{
+    cairo_t* handle;
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
+/**
+   Cairo Image class.
+
+   TODO ...
+ */
+class CairoImage : public ImageBase
+{
+public:
+   /**
+      Constructor for a null Image.
+    */
+    CairoImage();
+
+   /**
+      Constructor using raw image data.
+      @note @a rawData must remain valid for the lifetime of this Image.
+    */
+    CairoImage(const char* rawData, uint width, uint height, ImageFormat format);
+
+   /**
+      Constructor using raw image data.
+      @note @a rawData must remain valid for the lifetime of this Image.
+    */
+    CairoImage(const char* rawData, const Size<uint>& size, ImageFormat format);
+
+   /**
+      Constructor using another image data.
+    */
+    CairoImage(const CairoImage& image);
+
+   /**
+      Destructor.
+    */
+    ~CairoImage() override;
+
+   /**
+      Load raw image data from memory.
+      @note @a rawData must remain valid for the lifetime of this Image.
+    */
+    void loadFromMemory(const char* rawData,
+                        const Size<uint>& size,
+                        ImageFormat format = kImageFormatBGRA) noexcept override;
+
+   /**
+      Load PNG image from memory.
+      Image size is read from PNG contents.
+      @note @a pngData must remain valid for the lifetime of this Image.
+    */
+    void loadFromPNG(const char* pngData, uint dataSize) noexcept;
+
+   /**
+      Draw this image at position @a pos using the graphics context @a context.
+    */
+    void drawAt(const GraphicsContext& context, const Point<int>& pos) override;
+
+   /**
+      Get the cairo surface currently associated with this image.
+      FIXME might be removed
+    */
+    inline cairo_surface_t* getSurface() const noexcept
+    {
+        return surface;
+    }
+
+   /**
+      TODO document this.
+    */
+    CairoImage& operator=(const CairoImage& image) noexcept;
+
+    // FIXME this should not be needed
+    inline void loadFromMemory(const char* rdata, uint w, uint h, ImageFormat fmt = kImageFormatBGRA)
+    { loadFromMemory(rdata, Size<uint>(w, h), fmt); };
+    inline void draw(const GraphicsContext& context)
+    { drawAt(context, Point<int>(0, 0)); };
+    inline void drawAt(const GraphicsContext& context, int x, int y)
+    { drawAt(context, Point<int>(x, y)); };
+
+private:
+    cairo_surface_t* surface;
+    uchar* surfacedata;
+    int* datarefcount;
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
+/**
+   CairoWidget, handy class that takes graphics context during onDisplay and passes it in a new function.
+ */
+template <class BaseWidget>
+class CairoBaseWidget : public BaseWidget
+{
+public:
+   /**
+      Constructor for a CairoSubWidget.
+    */
+    explicit CairoBaseWidget(Widget* const parentGroupWidget);
+
+   /**
+      Constructor for a CairoTopLevelWidget.
+    */
+    explicit CairoBaseWidget(Window& windowToMapTo);
+
+   /**
+      Constructor for a CairoStandaloneWindow without parent window.
+    */
+    explicit CairoBaseWidget(Application& app);
+
+   /**
+      Constructor for a CairoStandaloneWindow with parent window.
+    */
+    explicit CairoBaseWidget(Application& app, Window& parentWindow);
+
+   /**
+      Destructor.
+    */
+    ~CairoBaseWidget() override {}
+
+protected:
+   /**
+      New virtual onDisplay function.
+      @see onDisplay
+    */
+    virtual void onCairoDisplay(const CairoGraphicsContext& context) = 0;
+
+private:
+   /**
+      Widget display function.
+      Implemented internally to pass context into the drawing function.
+    */
+    void onDisplay() override
+    {
+        const CairoGraphicsContext& context((const CairoGraphicsContext&)BaseWidget::getGraphicsContext());
+        onCairoDisplay(context);
+    }
+
+    DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CairoBaseWidget);
+};
+
+typedef CairoBaseWidget<SubWidget> CairoSubWidget;
+typedef CairoBaseWidget<TopLevelWidget> CairoTopLevelWidget;
+typedef CairoBaseWidget<StandaloneWindow> CairoStandaloneWindow;
+
+// --------------------------------------------------------------------------------------------------------------------
+
+typedef ImageBaseAboutWindow<CairoImage> CairoImageAboutWindow;
+typedef ImageBaseButton<CairoImage> CairoImageButton;
+typedef ImageBaseKnob<CairoImage> CairoImageKnob;
+typedef ImageBaseSlider<CairoImage> CairoImageSlider;
+typedef ImageBaseSwitch<CairoImage> CairoImageSwitch;
+
+// --------------------------------------------------------------------------------------------------------------------
+
+END_NAMESPACE_DGL
+
+#endif