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#pragma once
#include <basic/math.hpp>
#include <SDL3/SDL.h>
#include <SDL3/SDL_video.h>
#include <imgui.h>
#include <vector>
#include <memory>
class RSoftwareBackend;
class Renderer;
extern Renderer g_renderer;
enum REntityType : int32_t {
REntityType_Rectangle,
REntityType_MonoBitmap,
};
struct REntity_Rectangle {
REntityType type;
float x0;
float y0;
float x1;
float y1;
float z;
Color color;
};
struct REntity_MonoBitmap {
REntityType type;
float x;
float y;
int32_t w;
int32_t h;
float z;
void *data;
};
union REntity {
REntityType type;
REntity_Rectangle rect;
REntity_MonoBitmap bitmap;
};
struct RSortEntry {
float z;
size_t entity_index;
};
class Renderer {
public:
void Init(SDL_Window* window);
/* core functions */
void Draw();
void Reset();
void Clear(Color color);
void PushRectangle(RectF32 rect, float z, Color color);
void PushMonoBitmap(V3F32 pos, int w, int h, void* bitmap);
/* helper functions */
void SetScreenSize(int32_t w, int32_t h);
void SetCameraSize(float w, float h);
int32_t WorldXToScreenX(float x);
int32_t WorldYToScreenY(float y);
int32_t WorldWidthToScreenWidth(float w);
int32_t WorldHeightToScreenHeight(float h);
/* temporary helper functions (from old RGroup api) */
float GetScale();
V2F32 ViewPosToScreenPos(V2F32 view_pos);
V2F32 ViewSizeToScreenSize(V2F32 view_size);
ImVec2 ViewPosToScreenPosImGui(V2F32 view_pos);
ImVec2 ViewSizeToScreenSizeImGui(V2F32 view_size);
// Todo: make this private
public:
int32_t m_screen_w;
int32_t m_screen_h;
float m_camera_w;
float m_camera_h;
Color m_clear_color {};
std::vector<REntity> m_render_entities;
std::vector<RSortEntry> m_sort_entries;
std::unique_ptr<RSoftwareBackend> m_backend;
friend class RSoftwareBackend;
};
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