Add geometry handling.

src/core/Color.h

@@ -3,11 +3,6 @@
 
 class Color
 {
-    unsigned mR;
-    unsigned mG;
-    unsigned mB;
-    double mAlpha;
-
 public:
     Color(unsigned r, unsigned g, unsigned b, double a = 1.0);
 
@@ -19,6 +14,12 @@ public:
     unsigned GetG() const;
     unsigned GetB() const;
     double GetAlpha() const;
+
+private:
+    unsigned mR{0};
+    unsigned mG{0};
+    unsigned mB{0};
+    double mAlpha{0.0};
 };
 
 using ColorPtr = std::shared_ptr<Color>;

src/geometry/AbstractGeometricItem.h

@@ -0,0 +1,13 @@
+#pragma once
+
+class Rectangle;
+class Grid;
+
+class AbstractGeometricItem
+{
+public:
+
+    Rectangle GetBounds() const = 0;
+
+    void Sample(Grid* grid) const = 0;
+};

src/geometry/CMakeLists.txt

@@ -1,7 +1,21 @@
 list(APPEND geometry_LIB_INCLUDES 
+        AbstractGeometricItem.h
+        Circle.h
+        Circle.cpp
+        DiscretePoint.h
         DiscretePoint.cpp
+        Grid.h
+        Grid.cpp
+        Line.h
+        Line.cpp
+        Path.h
+        Path.cpp
+        Point.h
         Point.cpp
-        Rectangle.cpp)
+        Rectangle.h
+        Rectangle.cpp
+        Triangle.h
+        Triangle.cpp)
         
 
 # add the library

src/geometry/DiscretePoint.h

@@ -4,20 +4,20 @@
 
 class DiscretePoint
 {
-	unsigned mX;
-	unsigned mY;
+    unsigned mX;
+    unsigned mY;
 
 public:
 
-	DiscretePoint(unsigned x, unsigned y);
+    DiscretePoint(unsigned x, unsigned y);
 
-	~DiscretePoint();
+    ~DiscretePoint();
 
-	std::shared_ptr<DiscretePoint> Create(unsigned x, unsigned y);
+    std::shared_ptr<DiscretePoint> Create(unsigned x, unsigned y);
 
-	unsigned GetX() const;
+    unsigned GetX() const;
 
-	unsigned GetY() const;
+    unsigned GetY() const;
 };
 
 using Pixel = DiscretePoint;

src/geometry/Grid.h

@@ -0,0 +1,56 @@
+#pragma once
+
+#include "Rectangle.h"
+#include <vector>
+
+class Grid
+{
+public:
+
+    Grid(const Rectangle& bounds)
+        : mBounds(bounds)
+    {
+        mValues = std::vector<double>(mNumX*mNumY, 0.0);
+    }
+
+    Rectangle GetBounds() const
+    {
+        return mBounds;
+    }
+
+    double GetXSpacing() const
+    {
+        return mBounds.GetWidth()/double(mNumX);
+    }
+
+    double GetYSpacing() const
+    {
+        return mBounds.GetHeight()/double(mNumY);
+    }
+
+    std::vector<double> GetValues() const
+    {
+        return mValues;
+    }
+
+    void ResetBounds(const Rectangle& bounds)
+    {
+        mBounds = bounds;
+        mValues = std::vector<double>(mNumX*mNumY, 0.0);
+    }
+
+    void SetValues(const std::vector<std::size_t>& indices, double value)
+    {
+        for (auto index : indices)
+        {
+            mValues[index] = value;
+        }
+    }
+
+
+private:
+    Rectangle mBounds;
+    std::vector<double> mValues;
+    unsigned mNumX{5};
+    unsigned mNumY{5};
+};

src/geometry/Point.h

@@ -1,19 +1,47 @@
 #pragma once
 
 #include <memory>
+#include <cmath>
 
 class Point
 {
-	double mX;
-	double mY;
-
 public:
 
-	Point(double x, double y);
+    Point(double x, double y);
 
-	~Point();
+    ~Point();
 
-	std::shared_ptr<Point> Create(double x, double y);
+    std::shared_ptr<Point> Create(double x, double y);
+
+    double GetX() const
+    {
+        return mX;
+    }
+
+    double GetY() const
+    {
+        return mY;
+    }
+
+    double GetDistance(const Point& point) const
+    {
+        return std::sqrt(mX*point.GetX() + mY*point.GetY());
+    }
+
+    double GetDeltaX(const Point& point) const
+    {
+        return point.GetX() - mX;
+    }
+
+    double GetDeltaY(const Point& point) const
+    {
+        return point.GetY() - mY;
+    }
+
+private:
+
+    double mX;
+    double mY;
 };
 
 using PointPtr = std::shared_ptr<Point>;

src/geometry/Rectangle.h

@@ -1,7 +1,40 @@
 #pragma once
 
+#include "AbstractGeometricItem.h"
+#include "Point.h"
 
-class Rectangle
+class Rectangle : public AbstractGeometricItem
 {
+public:
 
+    Rectangle(const Point& bottomLeft, const Point& topRight)
+        : mBottomLeft(bottomLeft),
+          mTopRight(topRight)
+    {
+
+    }
+
+    Rectangle GetBounds() const override
+    {
+        return Rectangle(mBottomLeft, mTopRight);
+    }
+
+    void Sample(Grid* grid) const override
+    {
+
+    }
+
+    double GetHeight() const
+    {
+        return mBottomLeft.GetDeltaY(mTopRight);
+    }
+
+    double GetWidth() const
+    {
+        return mBottomLeft.GetDeltaX(mTopRight);
+    }
+
+private:
+    Point mBottomLeft;
+    Point mTopRight;
 };

src/graphics/CMakeLists.txt

@@ -4,33 +4,7 @@ set(platform_HEADERS "")
 set(platform_LIBS "")
 
 if (UNIX)
-find_package(PkgConfig)
-PKG_CHECK_MODULES(PC_CAIRO cairo)
-FIND_PATH(CAIRO_INCLUDE_DIRS
-    NAMES cairo.h
-    HINTS ${PC_CAIRO_INCLUDEDIR}
-          ${PC_CAIRO_INCLUDE_DIRS}
-    PATH_SUFFIXES cairo
-)
-
-FIND_LIBRARY(CAIRO_LIBRARIES
-    NAMES cairo
-    HINTS ${PC_CAIRO_LIBDIR}
-          ${PC_CAIRO_LIBRARY_DIRS}
-)
-list(APPEND platform_LIB_INCLUDES
-    cairo/CairoInterface.cpp
-    cairo/CairoDrawingSurface.cpp
-    cairo/CairoDrawingContext.cpp
-)
-list(APPEND platform_INCLUDE_DIRS
-    ${CAIRO_INCLUDE_DIRS}
-)
-list(APPEND platform_HEADERS
-    cairo/CairoInterface.h
-)
-list(APPEND platform_LIBS
-    ${CAIRO_LIBRARIES}
+list(APPEND platform_LIBSs
 	GL
 )
 else()
@@ -43,6 +17,7 @@ list(APPEND graphics_LIB_INCLUDES
     DrawingContext.cpp
     DrawingManager.cpp
     DrawingSurface.cpp
+    Rasterizer.cpp
     opengl/OpenGlInterface.cpp
 	${platform_LIB_INCLUDES}
 )
@@ -50,6 +25,7 @@ list(APPEND graphics_LIB_INCLUDES
 list(APPEND graphics_HEADERS 
     opengl/OpenGlInterface.h
     ${platform_HEADERS}
+    Rasterizer.h
     INativeDrawingSurface.h
     INativeDrawingContext.h)
 

src/graphics/DrawingContext.cpp

@@ -1,6 +1,7 @@
 #include "DrawingContext.h"
 
 #include "INativeDrawingContext.h"
+#include "AbstractGeometricItem.h"
 
 std::unique_ptr<DrawingContext> DrawingContext::Create()
 {
@@ -16,3 +17,18 @@ INativeDrawingContext* DrawingContext::GetNativeContext()
 {
     return mNativeDrawingContext.get();
 }
+
+void DrawingContext::AddDrawable(AbstractGeometricItemPtr item)
+{
+    mItems.push_back(std::move(item));
+}
+
+unsigned DrawingContext::GetNumItems() const
+{
+    return mItems.size();
+}
+
+AbstractGeometricItem* DrawingContext::GetDrawable(unsigned idx) const
+{
+    return mItems[idx].get();
+}

src/graphics/DrawingContext.h

@@ -1,8 +1,11 @@
 #pragma once
 
 #include <memory>
+#include <vector>
 
 class INativeDrawingContext;
+class AbstractGeometricItem;
+using AbstractGeometricItemPtr = std::unique_ptr<AbstractGeometricItem>;
 
 class DrawingContext
 {
@@ -15,8 +18,15 @@ public:
 
     INativeDrawingContext* GetNativeContext();
 
+    unsigned GetNumItems() const;
+
+    void AddDrawable(AbstractGeometricItemPtr item);
+
+    AbstractGeometricItem* GetDrawable(unsigned idx) const;
+
 private:
 
+    std::vector<std::unique_ptr<AbstractGeometricItem> > mItems;
     std::unique_ptr<INativeDrawingContext> mNativeDrawingContext;
 };
 

src/graphics/DrawingManager.cpp

@@ -3,15 +3,12 @@
 #include "INativeDrawingContext.h"
 #include "DrawingSurface.h"
 #include "DrawingContext.h"
-#ifdef __linux__
-#include "CairoInterface.h"
-#endif
+#include "Rasterizer.h"
 
 DrawingManager::DrawingManager()
+    : mRasterizer(std::make_unique<Rasterizer>())
 {
-#ifdef __linux__
-    mCairoInterface = CairoInterface::Create();
-#endif
+
 }
 
 std::unique_ptr<DrawingManager> DrawingManager::Create()
@@ -23,23 +20,11 @@ void DrawingManager::InitalizeSurface(unsigned width, unsigned height)
 {
     mDrawingSurface = DrawingSurface::Create();
     mDrawingSurface->SetSize(width, height);
-#ifdef __linux__
-    if (mCairoInterface)
-    {
-        mCairoInterface->InitializeSurface(mDrawingSurface.get());
-    }
-#endif
 }
 
 void DrawingManager::InitializeContext()
 {
     mDrawingContext = DrawingContext::Create();
-#ifdef __linux__
-    if (mCairoInterface && mDrawingSurface)
-    {
-        mCairoInterface->InitializeContext(mDrawingContext.get(), mDrawingSurface.get());
-    }
-#endif
 }
 
 void DrawingManager::AddText(TextElement* text)
@@ -53,20 +38,9 @@ void DrawingManager::AddText(TextElement* text)
     {
         return;
     }
-#ifdef __linux__
-    if (mCairoInterface)
-    {
-        mCairoInterface->AddText(text, mDrawingContext.get());
-    }
-#endif
 }
 
 void DrawingManager::RenderToFile(const std::string& path)
 {
-#ifdef __linux__
-    if (mDrawingSurface && mCairoInterface)
-    {
-        mCairoInterface->RenderToFile(mDrawingSurface.get(), path);
-    }
-#endif
+
 }

src/graphics/DrawingManager.h

@@ -4,9 +4,6 @@
 #include <string>
 #include "INativeDrawingContext.h"
 #include "INativeDrawingSurface.h"
-#ifdef __linux__
-#include "CairoInterface.h"
-#endif
 
 class TextElement;
 
@@ -15,6 +12,8 @@ using DrawingSurfacePtr = std::unique_ptr<DrawingSurface>;
 class DrawingContext;
 using DrawingContextPtr = std::unique_ptr<DrawingContext>;
 
+class Rasterizer;
+
 class DrawingManager
 {
 public:
@@ -26,11 +25,9 @@ public:
     void RenderToFile(const std::string& path);
 
 private:
+    std::unique_ptr<Rasterizer> mRasterizer;
     DrawingSurfacePtr mDrawingSurface {nullptr};
     DrawingContextPtr mDrawingContext {nullptr};
-#ifdef __linux__
-    CairoInterfacePtr mCairoInterface {nullptr};
-#endif
 };
 
 using DrawingManagerPtr = std::unique_ptr<DrawingManager>;

src/graphics/DrawingSurface.cpp

@@ -38,3 +38,8 @@ unsigned DrawingSurface::GetHeight() const
 {
     return mHeight;
 }
+
+void DrawingSurface::Paint(Grid* grid)
+{
+    mImageBuffer = std::make_unique<Image>();
+}

src/graphics/DrawingSurface.h

@@ -4,6 +4,9 @@
 
 #include "INativeDrawingSurface.h"
 
+class Grid;
+class Image;
+
 class DrawingSurface
 {
 public:
@@ -21,9 +24,14 @@ public:
 
     unsigned GetHeight() const;
 
+    void Paint(Grid* grid);
+
+    Image* GetAsImage() const;
+
 private:
 
     unsigned mWidth = 0;
     unsigned mHeight = 0;
+    std::unique_ptr<Image> mImageBuffer;
     std::unique_ptr<INativeDrawingSurface> mNativeDrawingSurface;
 };

src/graphics/Rasterizer.cpp

@@ -0,0 +1,25 @@
+#include "Rasterizer.h"
+
+#include "DrawingSurface.h"
+#include "DrawingContext.h"
+#include "Grid.h"
+
+Rasterizer::Rasterizer()
+     : mGrid(std::make_unique<Grid>(Rectangle(Point(0, 0), Point(100, 100))))
+{
+
+}
+
+void Rasterizer::Paint(DrawingSurface* surface, DrawingContext* context)
+{
+    const auto width = surface->GetWidth();
+    const auto height = surface->GetHeight();
+    mGrid->ResetBounds(Rectangle(Point(0, 0), Point(width, height)));
+
+    for (unsigned idx=0; idx< context->GetNumItems(); idx++)
+    {
+        context->GetDrawable(idx)->Sample(mGrid.get());
+    }
+
+    surface->Paint(mGrid.get());
+}

src/graphics/Rasterizer.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <memory>
+
+class DrawingSurface;
+class DrawingContext;
+class Grid;
+
+class Rasterizer
+{
+public:
+    Rasterizer();
+
+    void Paint(DrawingSurface* surface, DrawingContext* context);
+
+private:
+    std::unique_ptr<Grid> mGrid;
+};

src/graphics/cairo/CairoDrawingContext.cpp

@@ -1,31 +0,0 @@
-#include "CairoDrawingContext.h"
-
- cairo_t* CairoDrawingContext::GetNativeContext()
- {
-     return mNativeContext;
- }
-
- CairoDrawingContext::CairoDrawingContext(cairo_t* context)
-     : mNativeContext(context)
- {
-
- }
-
-CairoDrawingContext::~CairoDrawingContext()
- {
-     DestroyNativeContext();
- }
-
-std::unique_ptr<CairoDrawingContext> CairoDrawingContext::Create(cairo_t* context)
- {
-    return std::make_unique<CairoDrawingContext>(context);
- }
-
- void CairoDrawingContext::DestroyNativeContext()
- {
-     if (mNativeContext)
-     {
-         cairo_destroy (mNativeContext);
-         mNativeContext = nullptr;
-     }
- }

src/graphics/cairo/CairoDrawingContext.h

@@ -1,27 +0,0 @@
-#pragma once
-
-#include "INativeDrawingContext.h"
-
-#include <memory>
-#include <cairo.h>
-
-class CairoDrawingContext : public INativeDrawingContext
-{
-public:
-
-    CairoDrawingContext(cairo_t* context);
-
-    virtual ~CairoDrawingContext();
-
-    static std::unique_ptr<CairoDrawingContext> Create(cairo_t* context);
-
-    cairo_t* GetNativeContext();
-
-    void DestroyNativeContext();
-
-private:
-    cairo_t* mNativeContext;
-};
-
-using CairoDrawingContextPtr = std::unique_ptr<CairoDrawingContext>;
-

src/graphics/cairo/CairoDrawingSurface.cpp

@@ -1,31 +0,0 @@
-#include "CairoDrawingSurface.h"
-
-CairoDrawingSurface::CairoDrawingSurface(cairo_surface_t* surface)
-    : mNativeSurface(surface)
-{
-
-}
-
-CairoDrawingSurface::~CairoDrawingSurface()
-{
-    DestroyNativeSurface();
-}
-
-std::unique_ptr<CairoDrawingSurface> CairoDrawingSurface::Create(cairo_surface_t* surface)
-{
-    return std::make_unique<CairoDrawingSurface>(surface);
-}
-
-cairo_surface_t* CairoDrawingSurface::GetNativeSurface()
-{
-    return mNativeSurface;
-}
-
-void CairoDrawingSurface::DestroyNativeSurface()
-{
-    if (mNativeSurface)
-    {
-        cairo_surface_destroy (mNativeSurface);
-        mNativeSurface = nullptr;
-    }
-}

src/graphics/cairo/CairoDrawingSurface.h

@@ -1,27 +0,0 @@
-#pragma once
-
-#include "INativeDrawingSurface.h"
-
-#include <cairo.h>
-
-#include <memory>
-
-class CairoDrawingSurface : public INativeDrawingSurface
-{
-public:
-
-    CairoDrawingSurface(cairo_surface_t* surface);
-
-    virtual ~CairoDrawingSurface();
-
-    static std::unique_ptr<CairoDrawingSurface> Create(cairo_surface_t* surface);
-
-    cairo_surface_t* GetNativeSurface();
-
-    void DestroyNativeSurface() override;
-
-private:
-    cairo_surface_t* mNativeSurface;
-};
-
-using CairoDrawingSurfacePtr = std::unique_ptr<CairoDrawingSurface>;

src/graphics/cairo/CairoInterface.cpp

@@ -1,51 +0,0 @@
-#include "CairoInterface.h"
-
-#include "DrawingSurface.h"
-#include "DrawingContext.h"
-#include "CairoDrawingSurface.h"
-#include "CairoDrawingContext.h"
-#include "TextElement.h"
-
-#include <cairo.h>
-
-
-std::unique_ptr<CairoInterface> CairoInterface::Create()
-{
-    return std::make_unique<CairoInterface>();
-}
-
-void CairoInterface::InitializeSurface(DrawingSurface* surface)
-{
-    auto native_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
-            surface->GetWidth(), surface->GetHeight());
-
-    auto cairo_surface = CairoDrawingSurface::Create(native_surface);
-    surface->SetNativeSurface(std::move(cairo_surface));
-}
-
-void CairoInterface::InitializeContext(DrawingContext* context, DrawingSurface* surface)
-{
-    auto cairo_surface = dynamic_cast<CairoDrawingSurface*>(surface->GetNativeSurface());
-    auto native_context = cairo_create(cairo_surface->GetNativeSurface());
-
-    auto cairo_context = CairoDrawingContext::Create(native_context);
-    context->SetNativeContext(std::move(cairo_context));
-}
-
-void CairoInterface::RenderToFile(DrawingSurface* surface, const std::string& path)
-{
-    auto cairo_surface = dynamic_cast<CairoDrawingSurface*>(surface->GetNativeSurface());
-    cairo_surface_write_to_png (cairo_surface->GetNativeSurface(), path.c_str());
-}
-
-void CairoInterface::AddText(TextElement* text, DrawingContext* context)
-{
-    auto cairo_context = dynamic_cast<CairoDrawingContext*>(context->GetNativeContext());
-    auto native_context = cairo_context->GetNativeContext();
-
-    cairo_select_font_face (native_context, "serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
-    cairo_set_font_size (native_context, 32.0);
-    cairo_set_source_rgb (native_context, 0.0, 0.0, 1.0);
-    cairo_move_to(native_context, 10.0, 50.0);
-    cairo_show_text(native_context, text->GetContent().c_str());
-}

src/graphics/cairo/CairoInterface.h

@@ -1,26 +0,0 @@
-#pragma once
-
-#include <memory>
-#include <string>
-
-class DrawingSurface;
-class DrawingContext;
-class TextElement;
-
-class CairoInterface
-{
-public:
-    CairoInterface() = default;
-
-    static std::unique_ptr<CairoInterface> Create();
-
-    void InitializeSurface(DrawingSurface* surface);
-
-    void InitializeContext(DrawingContext* context, DrawingSurface* surface);
-
-    void AddText(TextElement* text, DrawingContext* context);
-
-    void RenderToFile(DrawingSurface* surface, const std::string& path);
-};
-
-using CairoInterfacePtr = std::unique_ptr<CairoInterface>;

src/image/CMakeLists.txt

@@ -16,6 +16,6 @@ target_include_directories(image PUBLIC
 set_target_properties( image PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON )   
 
 find_package(PNG REQUIRED)                       
-target_link_libraries( image PUBLIC PNG::PNG)
+target_link_libraries( image PUBLIC PNG::PNG core)
 
 set_property(TARGET image PROPERTY FOLDER src)

src/image/Image.cpp

@@ -7,6 +7,23 @@ Image::Image(unsigned width, unsigned height)
 
 }
 
+void Image::Initialize()
+{
+    mData = std::vector<unsigned char>(GetBytesPerRow()*mHeight, 0);
+}
+
+void Image::SetPixelValue(unsigned idx, unsigned jdx, const Color& color)
+{
+    if (mData.empty())
+    {
+        Initialize();
+    }
+
+    mData[jdx*GetBytesPerRow() + idx*3] = static_cast<unsigned char>(color.GetR());
+    mData[jdx*GetBytesPerRow() + idx*3 + 1] = static_cast<unsigned char>(color.GetG());
+    mData[jdx*GetBytesPerRow() + idx*3 + 2] = static_cast<unsigned char>(color.GetB());
+}
+
 std::unique_ptr<Image> Image::Create(unsigned width, unsigned height)
 {
     return std::make_unique<Image>(width, height);

src/image/Image.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "Color.h"
+
 #include <memory>
 #include <vector>
 
@@ -16,6 +18,9 @@ public:
     unsigned GetHeight() const;
     unsigned GetBitDepth() const;
     unsigned GetNumChannels() const;
+
+    void SetPixelValue(unsigned idx, unsigned jdx, const Color& color);
+
     unsigned char GetByte(unsigned idx, unsigned jdx) const;
 
     void SetData(const std::vector<unsigned char>& data);
@@ -25,6 +30,8 @@ public:
     void SetNumChannels(unsigned numChannels);
 
 private:
+    void Initialize();
+
     unsigned mWidth{1};
     unsigned mHeight{1};
     unsigned mBitDepth{8};

test/CMakeLists.txt

@@ -12,6 +12,7 @@ list(APPEND TestFiles
             audio/TestMidiReader.cpp
             database/TestDatabase.cpp
             graphics/TestOpenGlRendering.cpp
+            graphics/TestRasterizer.cpp
             ipc/TestDbus.cpp
             image/TestPngWriter.cpp
             publishing/TestPdfWriter.cpp
@@ -24,6 +25,7 @@ list(APPEND TestNames
             TestMidiReader
             TestDatabase
             TestOpenGlRendering
+            TestRasterizer
             TestDbus
             TestPngWriter
             TestPdfWriter

test/audio/TestAudioWriter.cpp

@@ -51,7 +51,7 @@ int main()
 #endif
     std::cout << "into entry point" << std::endl;
     TestCaseRunner runner;
-    //runner.AddTestCase("TestWriteNav", std::make_unique<TestWriteWav>());
+    runner.AddTestCase("TestWriteNav", std::make_unique<TestWriteWav>());
     runner.AddTestCase("TestAudioRender", std::make_unique<TestAudioRender>());
 
     const auto testsPassed = runner.Run();

test/graphics/TestRasterizer.cpp

@@ -0,0 +1,9 @@
+#include "Image.h"
+#include "PngWriter.h"
+#include "DrawingManager.h"
+
+int main()
+{
+    DrawingManager manager;
+    return 0;
+}