From d3591e3e7b1c26e1de19dfce70aaeaba5d9f648c Mon Sep 17 00:00:00 2001
From: falkTX <falktx@falktx.com>
Date: Mon, 17 May 2021 23:13:08 +0100
Subject: [PATCH] Add VulkanImage stub, enable vulkan for Demo test

Signed-off-by: falkTX <falktx@falktx.com>
---
 dgl/Cairo.hpp      |  4 ++-
 dgl/Vulkan.hpp     | 66 +++++++++++++++++++++++++++++++++++++++++++++-
 dgl/src/Vulkan.cpp | 34 ++++++++++++++++++++++++
 tests/Demo.cpp     |  7 +++++
 tests/Makefile     |  1 +
 5 files changed, 110 insertions(+), 2 deletions(-)

diff --git a/dgl/Cairo.hpp b/dgl/Cairo.hpp
index ba97dd4c..bb6f5538 100644
--- a/dgl/Cairo.hpp
+++ b/dgl/Cairo.hpp
@@ -91,8 +91,10 @@ public:
     CairoImage& operator=(const CairoImage& image) noexcept;
 
     // FIXME this should not be needed
-    inline void loadFromMemory(const char* rawData, uint w, uint h, ImageFormat format)
+    inline void loadFromMemory(const char* rawData, uint w, uint h, ImageFormat format = kImageFormatBGRA)
     { loadFromMemory(rawData, Size<uint>(w, h), format); };
+    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)); };
 
diff --git a/dgl/Vulkan.hpp b/dgl/Vulkan.hpp
index c636a8a3..d7b73056 100644
--- a/dgl/Vulkan.hpp
+++ b/dgl/Vulkan.hpp
@@ -17,7 +17,7 @@
 #ifndef DGL_VULKAN_HPP_INCLUDED
 #define DGL_VULKAN_HPP_INCLUDED
 
-#include "Base.hpp"
+#include "ImageBase.hpp"
 
 #include <vulkan/vulkan_core.h>
 
@@ -34,6 +34,70 @@ struct VulkanGraphicsContext : GraphicsContext
 
 // --------------------------------------------------------------------------------------------------------------------
 
+/**
+   Vulkan Image class.
+
+   TODO ...
+ */
+class VulkanImage : public ImageBase
+{
+public:
+   /**
+      Constructor for a null Image.
+    */
+    VulkanImage();
+
+   /**
+      Constructor using raw image data.
+      @note @a rawData must remain valid for the lifetime of this Image.
+    */
+    VulkanImage(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.
+    */
+    VulkanImage(const char* rawData, const Size<uint>& size, ImageFormat format);
+
+   /**
+      Constructor using another image data.
+    */
+    VulkanImage(const VulkanImage& image);
+
+   /**
+      Destructor.
+    */
+    ~VulkanImage() override;
+
+   /**
+      Load 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;
+
+   /**
+      Draw this image at position @a pos using the graphics context @a context.
+    */
+    void drawAt(const GraphicsContext& context, const Point<int>& pos) override;
+
+   /**
+      TODO document this.
+    */
+    VulkanImage& operator=(const VulkanImage& image) noexcept;
+
+    // FIXME this should not be needed
+    inline void loadFromMemory(const char* rawData, uint w, uint h, ImageFormat format = kImageFormatBGRA)
+    { loadFromMemory(rawData, Size<uint>(w, h), format); };
+    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)); };
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
 END_NAMESPACE_DGL
 
 #endif
diff --git a/dgl/src/Vulkan.cpp b/dgl/src/Vulkan.cpp
index ed499222..7ec5db67 100644
--- a/dgl/src/Vulkan.cpp
+++ b/dgl/src/Vulkan.cpp
@@ -164,6 +164,40 @@ template class Rectangle<uint>;
 template class Rectangle<short>;
 template class Rectangle<ushort>;
 
+// -----------------------------------------------------------------------
+// VulkanImage
+
+VulkanImage::VulkanImage()
+    : ImageBase() {}
+
+VulkanImage::VulkanImage(const char* const rawData, const uint width, const uint height, const ImageFormat format)
+    : ImageBase(rawData, width, height, format) {}
+
+VulkanImage::VulkanImage(const char* const rawData, const Size<uint>& size, const ImageFormat format)
+    : ImageBase(rawData, size, format) {}
+
+VulkanImage::VulkanImage(const VulkanImage& image)
+    : ImageBase(image.rawData, image.size, image.format) {}
+
+VulkanImage::~VulkanImage() {}
+
+void VulkanImage::loadFromMemory(const char* const rdata, const Size<uint>& s, const ImageFormat fmt) noexcept
+{
+    ImageBase::loadFromMemory(rdata, s, fmt);
+}
+
+void VulkanImage::drawAt(const GraphicsContext&, const Point<int>&)
+{
+}
+
+VulkanImage& VulkanImage::operator=(const VulkanImage& image) noexcept
+{
+    rawData = image.rawData;
+    size    = image.size;
+    format  = image.format;
+    return *this;
+}
+
 // -----------------------------------------------------------------------
 
 void SubWidget::PrivateData::display(const uint width, const uint height, const double autoScaleFactor)
diff --git a/tests/Demo.cpp b/tests/Demo.cpp
index e86abdcd..f5998fef 100644
--- a/tests/Demo.cpp
+++ b/tests/Demo.cpp
@@ -35,6 +35,10 @@ typedef DGL_NAMESPACE::CairoImage DemoImage;
 #include "../dgl/OpenGL.hpp"
 typedef DGL_NAMESPACE::OpenGLImage DemoImage;
 #endif
+#ifdef DGL_VULKAN
+#include "../dgl/Vulkan.hpp"
+typedef DGL_NAMESPACE::VulkanImage DemoImage;
+#endif
 
 START_NAMESPACE_DGL
 
@@ -245,6 +249,9 @@ public:
 #ifdef DGL_OPENGL
     static constexpr const char* const kExampleWidgetName = "Demo - OpenGL";
 #endif
+#ifdef DGL_VULKAN
+    static constexpr const char* const kExampleWidgetName = "Demo - Vulkan";
+#endif
 
     DemoWindow(Application& app)
         : StandaloneWindow(app),
diff --git a/tests/Makefile b/tests/Makefile
index 24c9385b..dde5918d 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -27,6 +27,7 @@ TESTS   += Demo.opengl
 WTESTS  += Window.opengl
 endif
 ifeq ($(HAVE_VULKAN),true)
+TESTS   += Demo.vulkan
 WTESTS   = Window.vulkan
 endif