new native matrix implementation

Signed-off-by: Peter Siegmund <developer@mars3142.org>

components/CMakeLists.txt

@@ -3,6 +3,7 @@ if (NOT DEFINED ENV{IDF_PATH})
 
     add_subdirectory(imgui)
     add_subdirectory(insa)
+    add_subdirectory(led-manager)
 
     target_link_libraries(components INTERFACE ImGui)
 endif ()

components/led-manager/CMakeLists.txt

@@ -14,8 +14,13 @@ project(led-manager)
 
 add_library(${PROJECT_NAME} STATIC
         src/hal_native/led_manager.cpp
+        src/hal_native/Matrix.cpp
 )
 
 include_directories(include)
 
 target_include_directories(${PROJECT_NAME} PUBLIC include)
+
+target_link_libraries(${PROJECT_NAME} PRIVATE
+        SDL3::SDL3
+)

components/led-manager/include/Matrix.h

@@ -0,0 +1,28 @@
+#pragma once
+#include "SDL3/SDL_render.h"
+
+#include <cstdint>
+
+class Matrix
+{
+  public:
+    explicit Matrix(SDL_WindowID windowId, SDL_Renderer *renderer, uint8_t cols, uint8_t rows);
+
+    [[nodiscard]] SDL_Renderer *renderer() const;
+
+    void Render() const;
+
+    SDL_WindowID windowId() const;
+
+  private:
+    void DrawColoredGrid() const;
+
+    SDL_WindowID m_windowId;
+    SDL_Renderer *m_renderer;
+
+    uint8_t m_cols;
+    uint8_t m_rows;
+
+    static constexpr float cellSize = 50.0f;
+    static constexpr float spacing = 1.0f;
+};

components/led-manager/src/hal_native/Matrix.cpp

@@ -0,0 +1,64 @@
+#include "../../include/Matrix.h"
+
+#include "SDL3/SDL.h"
+
+Matrix::Matrix(uint32_t windowID, SDL_Renderer *renderer, const uint8_t cols, const uint8_t rows)
+    : m_windowId(windowID), m_renderer(renderer), m_cols(cols), m_rows(rows)
+{
+}
+
+SDL_Renderer *Matrix::renderer() const
+{
+    return m_renderer;
+}
+
+SDL_WindowID Matrix::windowId() const
+{
+    return m_windowId;
+}
+
+void Matrix::DrawColoredGrid() const
+{
+    int i = 0;
+    for (int w = 0; w < m_cols; w++)
+    {
+        const auto phase = w % (2 * m_rows);
+
+        for (int h_raw = 0; h_raw < m_rows; h_raw++)
+        {
+            int h;
+            if (phase < m_rows)
+            {
+                h = h_raw;
+            }
+            else
+            {
+                h = m_rows - 1 - h_raw;
+            }
+
+            const auto rectSize = cellSize - 2.0f * spacing;
+
+            const auto x = static_cast<float>(w) * cellSize + spacing;
+            const auto y = static_cast<float>(h) * cellSize + spacing;
+
+            auto rect = SDL_FRect{x, y, rectSize, rectSize};
+
+            i++;
+            const auto red = static_cast<Uint8>(static_cast<float>(i) * 255.0f);
+            const auto green = static_cast<Uint8>(static_cast<float>(i) * 255.0f);
+            const auto blue = static_cast<Uint8>(static_cast<float>(i) * 255.0f);
+            SDL_SetRenderDrawColor(m_renderer, red, green, blue, 255);
+            SDL_RenderFillRect(m_renderer, &rect);
+        }
+    }
+}
+
+void Matrix::Render() const
+{
+    SDL_SetRenderDrawColor(m_renderer, 0, 0, 0, 255);
+    SDL_RenderClear(m_renderer);
+
+    DrawColoredGrid();
+
+    SDL_RenderPresent(m_renderer);
+}