From 2c934fd5a3acfb712ebbd38188bf71111cefd113 Mon Sep 17 00:00:00 2001
From: Robert <Robert-Altner@t-online.de>
Date: Mon, 18 May 2020 18:29:37 +0200
Subject: [PATCH] Cursor is now changeable

---
 SDLU/graphics/RenderWindow.cpp | 37 ++++++++++++++++++++++++++++++
 SDLU/graphics/RenderWindow.hpp | 42 +++++++++++++++++++++++++++++++++-
 SDLU_Example/main.cpp          |  3 ++-
 3 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/SDLU/graphics/RenderWindow.cpp b/SDLU/graphics/RenderWindow.cpp
index db386f0..c05e5cf 100644
--- a/SDLU/graphics/RenderWindow.cpp
+++ b/SDLU/graphics/RenderWindow.cpp
@@ -245,4 +245,41 @@ namespace sdlu
     {
         m_oFramerate = max;
     }
+
+    void RenderWindow::SetMouseCursor(SDL_Cursor* cursor)
+    {
+        SDL_SetCursor(cursor);
+    }
+
+    void RenderWindow::SetMouseCursor(SDL_SystemCursor cursor)
+    {
+        SDL_Cursor* _cursor = SDL_CreateSystemCursor(cursor);
+        SDL_SetCursor(_cursor);
+    }
+
+    void RenderWindow::SetMouseCursor(SDL_Surface* surface, Vector2u clickspot)
+    {
+        SDL_Cursor* _cursor = SDL_CreateColorCursor(surface, clickspot.x, clickspot.y);
+        SDL_SetCursor(_cursor);
+    }
+
+    void RenderWindow::SetMouseCursor(const Uint8* pixels, Vector2u size, Vector2u clickspot)
+    {
+        size_t _size = static_cast<size_t>(size.x) * static_cast<size_t>(size.y) * 4;
+        void* _pixels = malloc(_size);
+        memcpy(_pixels, pixels, _size);
+        SDL_Surface* surface = SDL_CreateRGBSurfaceWithFormatFrom(_pixels,
+            size.x, size.y, 32, 8 * size.x, SDL_PIXELFORMAT_RGBA8888);
+        this->SetMouseCursor(surface, clickspot);
+    }
+
+    void RenderWindow::SetMouseCursor(const Uint32* pixels, Vector2u size, Vector2u clickspot)
+    {
+        size_t _size = static_cast<size_t>(size.x) * static_cast<size_t>(size.y) * 4;
+        void* _pixels = malloc(_size);
+        memcpy(_pixels, pixels, _size);
+        SDL_Surface* surface = SDL_CreateRGBSurfaceWithFormatFrom(_pixels,
+            size.x, size.y, 32, 8 * size.x, SDL_PIXELFORMAT_RGBA32);
+        this->SetMouseCursor(surface, clickspot);
+    }
 }
\ No newline at end of file
diff --git a/SDLU/graphics/RenderWindow.hpp b/SDLU/graphics/RenderWindow.hpp
index 0534efa..eee6972 100644
--- a/SDLU/graphics/RenderWindow.hpp
+++ b/SDLU/graphics/RenderWindow.hpp
@@ -233,7 +233,47 @@ namespace sdlu
          *
          * @param[in] max The new maximum framerate
          */
-        void SetMaxFramerate(Uint32 max);
+        void SetMaxFramerate(Uint32 max);   
+
+        /**
+         * @brief Changes the mouse cursor
+         *
+         * @param[in] cursor A pointer to a SDL_Cursor containing cursor data
+         */
+        void SetMouseCursor(SDL_Cursor* cursor);
+
+        /**
+         * @brief Changes the mouse cursor
+         *
+         * @param[in] cursor An enum for a system cursor
+         */
+        void SetMouseCursor(SDL_SystemCursor cursor);
+
+        /**
+         * @brief Changes the mouse cursor
+         * 
+         * @param[in] surface   A pointer to a SDL_Surface containing sprite data
+         * @param[in] clickspot The effective position of the cursor relative to the top left of the sprite
+         */
+        void SetMouseCursor(SDL_Surface* surface, Vector2u clickspot);
+
+        /**
+         * @brief Changes the mouse cursor
+         * 
+         * @param[in] pixels    An array of color data (RGBA as seperate 8-bit values)
+         * @param[in] size      Size of the cursor
+         * @param[in] clickspot The effective position of the cursor relative to the top left of the sprite
+         */
+        void SetMouseCursor(const Uint8* pixels, Vector2u size, Vector2u clickspot);
+
+        /**
+         * @brief Changes the mouse cursor
+         *
+         * @param[in] pixels    An array of color data (RGBA as one 32-bit value)
+         * @param[in] size      Size of the cursor
+         * @param[in] clickspot The effective position of the cursor relative to the top left of the sprite
+         */
+        void SetMouseCursor(const Uint32* pixels, Vector2u size, Vector2u clickspot);
 
     protected:
         SDL_Window* m_pWindow;      ///< A pointer to the window object
diff --git a/SDLU_Example/main.cpp b/SDLU_Example/main.cpp
index 7783776..6815c5d 100644
--- a/SDLU_Example/main.cpp
+++ b/SDLU_Example/main.cpp
@@ -22,6 +22,7 @@ int main(int argc, char** argv)
     SDL_SetWindowTitle(window.GetWindow(), "New Title");
 
     window.SetIcon(64, 64, icon_data);
+    window.SetMouseCursor(SDL_SYSTEM_CURSOR_CROSSHAIR);
     window.SetMaxFramerate(144);
 
     SDL_Event event;
@@ -45,7 +46,7 @@ int main(int argc, char** argv)
         window.Clear(sdlu::Color::FromHSV(floor(t), 100, 100));
 
         window.Display();
-        t += 0.01;
+        t += 0.08;
 
         diff = std::chrono::duration_cast<std::chrono::microseconds>
             (std::chrono::steady_clock::now() - start).count();