Add stubs for vulkan

Signed-off-by: falkTX <falktx@falktx.com>

Makefile.base.mk

@@ -219,6 +219,7 @@ endif
 # Check for required libraries
 
 HAVE_CAIRO  = $(shell $(PKG_CONFIG) --exists cairo && echo true)
+HAVE_VULKAN = $(shell $(PKG_CONFIG) --exists vulkan && echo true)
 
 ifeq ($(MACOS_OR_WINDOWS),true)
 HAVE_OPENGL = true
@@ -316,6 +317,18 @@ HAVE_CAIRO_OR_OPENGL = true
 
 endif
 
+# ---------------------------------------------------------------------------------------------------------------------
+# Set Vulkan specific stuff
+
+ifeq ($(HAVE_VULKAN),true)
+
+DGL_FLAGS   += -DHAVE_VULKAN
+
+VULKAN_FLAGS  = $(shell $(PKG_CONFIG) --cflags vulkan)
+VULKAN_LIBS   = $(shell $(PKG_CONFIG) --libs vulkan)
+
+endif
+
 # ---------------------------------------------------------------------------------------------------------------------
 # Set optional libraries specific stuff
 

dgl/Makefile

@@ -55,8 +55,8 @@ endif
 # ---------------------------------------------------------------------------------------------------------------------
 
 OBJS_opengl = $(OBJS_common) \
-	../build/dgl/ImageWidgets.cpp.o \
 	../build/dgl/OpenGL.cpp.opengl.o \
+	../build/dgl/ImageWidgets.cpp.o \
 	../build/dgl/NanoVG.cpp.opengl.o
 
 ifeq ($(MACOS),true)
@@ -68,7 +68,7 @@ endif
 # ---------------------------------------------------------------------------------------------------------------------
 
 OBJS_vulkan = $(OBJS_common) \
-	../build/dgl/Cairo.cpp.vulkan.o
+	../build/dgl/Vulkan.cpp.vulkan.o
 
 ifeq ($(MACOS),true)
 OBJS_vulkan += ../build/dgl/pugl.mm.vulkan.o

dgl/Vulkan.hpp

@@ -0,0 +1,39 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2021 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_VULKAN_HPP_INCLUDED
+#define DGL_VULKAN_HPP_INCLUDED
+
+#include "Base.hpp"
+
+#include <vulkan/vulkan_core.h>
+
+START_NAMESPACE_DGL
+
+// --------------------------------------------------------------------------------------------------------------------
+
+/**
+   Vulkan Graphics context.
+ */
+struct VulkanGraphicsContext : GraphicsContext
+{
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
+END_NAMESPACE_DGL
+
+#endif

dgl/src/Vulkan.cpp

@@ -0,0 +1,213 @@
+/*
+ * DISTRHO Plugin Framework (DPF)
+ * Copyright (C) 2012-2021 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.
+ */
+
+#include "../Vulkan.hpp"
+#include "../Color.hpp"
+
+#include "SubWidgetPrivateData.hpp"
+#include "TopLevelWidgetPrivateData.hpp"
+#include "WidgetPrivateData.hpp"
+#include "WindowPrivateData.hpp"
+
+START_NAMESPACE_DGL
+
+// -----------------------------------------------------------------------
+
+static void notImplemented(const char* const name)
+{
+    d_stderr2("vulkan function not implemented: %s", name);
+}
+
+// -----------------------------------------------------------------------
+// Color
+
+void Color::setFor(const GraphicsContext&, bool)
+{
+    notImplemented("Color::setFor");
+}
+
+// -----------------------------------------------------------------------
+// Line
+
+template<typename T>
+void Line<T>::draw(const GraphicsContext&, T)
+{
+    notImplemented("Line::draw");
+}
+
+template<typename T>
+void Line<T>::draw()
+{
+    notImplemented("Line::draw");
+}
+
+template class Line<double>;
+template class Line<float>;
+template class Line<int>;
+template class Line<uint>;
+template class Line<short>;
+template class Line<ushort>;
+
+// -----------------------------------------------------------------------
+// Circle
+
+template<typename T>
+void Circle<T>::draw(const GraphicsContext&)
+{
+    notImplemented("Circle::draw");
+}
+
+template<typename T>
+void Circle<T>::drawOutline(const GraphicsContext&, T)
+{
+    notImplemented("Circle::drawOutline");
+}
+
+template<typename T>
+void Circle<T>::draw()
+{
+    notImplemented("Circle::draw");
+}
+
+template<typename T>
+void Circle<T>::drawOutline()
+{
+    notImplemented("Circle::drawOutline");
+}
+
+template class Circle<double>;
+template class Circle<float>;
+template class Circle<int>;
+template class Circle<uint>;
+template class Circle<short>;
+template class Circle<ushort>;
+
+// -----------------------------------------------------------------------
+// Triangle
+
+template<typename T>
+void Triangle<T>::draw(const GraphicsContext&)
+{
+    notImplemented("Triangle::draw");
+}
+
+template<typename T>
+void Triangle<T>::drawOutline(const GraphicsContext&, T)
+{
+    notImplemented("Triangle::drawOutline");
+}
+
+template<typename T>
+void Triangle<T>::draw()
+{
+    notImplemented("Triangle::draw");
+}
+
+template<typename T>
+void Triangle<T>::drawOutline()
+{
+    notImplemented("Triangle::drawOutline");
+}
+
+template class Triangle<double>;
+template class Triangle<float>;
+template class Triangle<int>;
+template class Triangle<uint>;
+template class Triangle<short>;
+template class Triangle<ushort>;
+
+
+// -----------------------------------------------------------------------
+// Rectangle
+
+template<typename T>
+void Rectangle<T>::draw(const GraphicsContext&)
+{
+    notImplemented("Rectangle::draw");
+}
+
+template<typename T>
+void Rectangle<T>::drawOutline(const GraphicsContext&, T)
+{
+    notImplemented("Rectangle::drawOutline");
+}
+
+template<typename T>
+void Rectangle<T>::draw()
+{
+    notImplemented("Rectangle::draw");
+}
+
+template<typename T>
+void Rectangle<T>::drawOutline()
+{
+    notImplemented("Rectangle::drawOutline");
+}
+
+template class Rectangle<double>;
+template class Rectangle<float>;
+template class Rectangle<int>;
+template class Rectangle<uint>;
+template class Rectangle<short>;
+template class Rectangle<ushort>;
+
+// -----------------------------------------------------------------------
+
+void SubWidget::PrivateData::display(const uint width, const uint height, const double autoScaleFactor)
+{
+    // TODO
+
+    selfw->pData->displaySubWidgets(width, height, autoScaleFactor);
+}
+
+// -----------------------------------------------------------------------
+
+void TopLevelWidget::PrivateData::display()
+{
+    const Size<uint> size(window.getSize());
+    const uint width  = size.getWidth();
+    const uint height = size.getHeight();
+
+    const double autoScaleFactor = window.pData->autoScaleFactor;
+
+    // FIXME anything needed here?
+#if 0
+    // full viewport size
+    if (window.pData->autoScaling)
+        glViewport(0, -(height * autoScaleFactor - height), width * autoScaleFactor, height * autoScaleFactor);
+    else
+        glViewport(0, 0, width, height);
+#endif
+
+    // main widget drawing
+    self->onDisplay();
+
+    // now draw subwidgets if there are any
+    selfw->pData->displaySubWidgets(width, height, autoScaleFactor);
+}
+
+// -----------------------------------------------------------------------
+
+const GraphicsContext& Window::PrivateData::getGraphicsContext() const noexcept
+{
+    return (const GraphicsContext&)graphicsContext;
+}
+
+// -----------------------------------------------------------------------
+
+END_NAMESPACE_DGL
+
+// -----------------------------------------------------------------------