Completed video subsystem and SdlWindow impl.

libplip/PlipVideo.h

@@ -20,9 +20,14 @@ namespace Plip {
 
     class PlipVideo {
     public:
+        virtual bool BeginDraw() = 0;
+        virtual void Draw(void *data) = 0;
+        virtual void Clear() = 0;
+        virtual bool EndDraw() = 0;
         virtual PlipVideoFormat GetFormat() = 0;
         virtual void Resize(int width, int height) = 0;
         virtual void SetTitle(std::string title) = 0;
+        virtual void Render() = 0;
 
     protected:
         PlipVideo() = default;

plip-sdl/SdlWindow.cpp

@@ -64,6 +64,14 @@ namespace PlipSdl {
         if(m_window != nullptr) SDL_DestroyWindow(m_window);
     }
 
+    bool SdlWindow::BeginDraw() {
+        return SDL_LockTexture(m_texture, nullptr, &m_texData, &m_pitch) == 0;
+    }
+
+    void SdlWindow::Clear() {
+        SDL_RenderClear(m_renderer);
+    }
+
     void SdlWindow::CreateTexture() {
         if(m_texture != nullptr) SDL_DestroyTexture(m_texture);
 
@@ -87,6 +95,8 @@ namespace PlipSdl {
             case Plip::PlipVideoFormat::BGRA8888:
                 pixelFormat = SDL_PIXELFORMAT_BGRA8888;
                 break;
+            default:
+                throw Plip::PlipVideoException("Unsupported pixel format.");
         }
 
         m_texture = nullptr;
@@ -101,10 +111,24 @@ namespace PlipSdl {
         }
     }
 
+    void SdlWindow::Draw(void *data) {
+        memcpy(m_texData, data, m_pitch * m_height);
+    }
+
+    bool SdlWindow::EndDraw() {
+        SDL_UnlockTexture(m_texture);
+        return true;
+    }
+
     Plip::PlipVideoFormat SdlWindow::GetFormat() {
         return m_format;
     }
 
+    void SdlWindow::Render() {
+        SDL_RenderCopy(m_renderer, m_texture, nullptr, nullptr);
+        SDL_RenderPresent(m_renderer);
+    }
+
     void SdlWindow::Resize(int width, int height) {
         m_width = width;
         m_height = height;

plip-sdl/SdlWindow.h

@@ -15,7 +15,12 @@ namespace PlipSdl {
         explicit SdlWindow(int scale = 1, const std::string &title = "");
         ~SdlWindow();
 
+        bool BeginDraw() override;
+        void Clear() override;
+        void Draw(void *data) override;
+        bool EndDraw() override;
         Plip::PlipVideoFormat GetFormat() override;
+        void Render() override;
         void Resize(int width, int height) override;
         void SetScale(int scale);
         void SetTitle(std::string title) override;
@@ -24,18 +29,20 @@ namespace PlipSdl {
         void CreateTexture();
         bool SelectFormat(uint32_t format);
 
-        const int m_init_width = 64;
-        const int m_init_height = 64;
+        const int m_initWidth = 64;
+        const int m_initHeight = 64;
 
-        int m_width = m_init_width;
-        int m_height = m_init_height;
+        int m_width = m_initWidth;
+        int m_height = m_initHeight;
         int m_scale;
 
+        void *m_texData = nullptr;
+        int m_pitch = -1;
+
         SDL_Window *m_window = nullptr;
         SDL_Renderer *m_renderer = nullptr;
         SDL_Texture *m_texture = nullptr;
 
         Plip::PlipVideoFormat m_format = Plip::PlipVideoFormat::Unknown;
-
     };
 }