1 files changed, 83 insertions, 0 deletions
diff --git a/src/renderer/RenderGroup.hpp b/src/renderer/RenderGroup.hpp
new file mode 100644
index 0000000..4904220
--- /dev/null
+++ b/src/renderer/RenderGroup.hpp
@@ -0,0 +1,83 @@
+#pragma once
+
+#include <basic/defs.hpp>
+#include <basic/math.hpp>
+#include <vector>
+#include <imgui.h>
+
+enum REntityType : int32_t {
+    REntityType_Rectangle,
+    REntityType_Bitmap,
+};
+
+struct REntity_Rectangle {
+    REntityType type;
+    V3F32 pos;
+    V2F32 dim;
+    V3F32 color;
+};
+
+struct REntity_Bitmap {
+    REntityType type;
+    V3F32 pos;
+    int32_t width;
+    int32_t height;
+    void *data;
+};
+
+union REntity {
+    REntityType type;
+    REntity_Rectangle rect;
+    REntity_Bitmap bitmap;
+};
+
+struct RSortEntry {
+    RSortEntry(float z, size_t entity_index);
+    float z;
+    size_t entity_index;
+};
+
+
+class RenderGroup {
+public:
+    RenderGroup();
+    void Clear(V3F32 color);
+    void Reset();
+
+    void SetCameraSize(float width, float height);
+    V2F32 ViewPosToScreenPos(V2F32 view_pos);
+    V2F32 ViewSizeToScreenSize(V2F32 view_size);
+    ImVec2 ViewPosToScreenPosImGui(V2F32 view_pos);
+    ImVec2 ViewSizeToScreenSizeImGui(V2F32 view_size);
+    float GetScale();
+
+
+public:
+    void PushRectangle(V3F32 pos, V2F32 dim, V3F32 color);
+    void PushBitmap(V3F32 pos, int width, int height, void *bitmap);
+
+
+private:
+    void Sort();
+
+
+public:
+    int32_t m_ScreenWidth;
+    int32_t m_ScreenHeight;
+
+
+private:
+    friend class GlRenderer;
+
+
+    float m_CameraWidth;
+    float m_CameraHeight;
+
+
+    V3F32 m_ClearColor;
+
+    std::vector<REntity> m_REntities;
+    std::vector<RSortEntry> m_RSortEntries;
+};
+
+