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#pragma once
#include <SDL2/SDL_render.h>
#include <SDL2/SDL_scancode.h>
#include <SDL2/SDL_gamecontroller.h>
#include <string>
#include <map>
#include <array>
#include <climits>
#include "soloud.h"
#define READONLY(T, X, V) private: T _##X = V; public: decltype(_##X) const& X = _##X
class FLD {
public:
using Error = int;
using Uint = unsigned int;
using MainLoop = int (*)(FLD& fld, void *udata);
enum class InputState {
Up,
Down,
Release,
Press
};
struct Config {
int width = 640;
int height = 480;
int scale = 1;
int target_fps = 60;
bool pixel_perfect = true;
bool hide_cursor = true;
std::string title = "FLD project";
};
struct Color {
float r = -1.0f;
float g = -1.0f;
float b = -1.0f;
float a = -1.0f;
};
struct Point {
int x;
int y;
};
struct Rectangle {
int x;
int y;
int w;
int h;
};
struct DrawImageOpts {
const Point& p;
int ix = 0;
int iy = 0;
int w = INT_MIN;
int h = INT_MIN;
float r = 0.0f;
float sx = 1.0f;
float sy = 1.0f;
Uint f = NONE;
};
struct Image {
FLD *fld = nullptr;
std::string path = "";
bool valid = true;
SDL_Texture *ptr = nullptr;
int width = 0;
int height = 0;
[[nodiscard]] Error invalid() const;
Error draw(const DrawImageOpts& opts) const;
Error setScaleMode(SDL_ScaleMode scale_mode) const;
};
enum DrawFlag {
NONE = 0,
FILL = 1,
CENTER = 2,
FLIP_X = 4,
FLIP_Y = 8,
};
static constexpr Color BLACK {0.0f, 0.0f, 0.0f, -1.0f};
static constexpr Color RED {1.0f, 0.0f, 0.0f, -1.0f};
static constexpr Color GREEN {0.0f, 1.0f, 0.0f, -1.0f};
static constexpr Color BLUE {0.0f, 0.0f, 1.0f, -1.0f};
static constexpr Color YELLOW {1.0f, 1.0f, 0.0f, -1.0f};
static constexpr Color PURPLE {1.0f, 0.0f, 1.0f, -1.0f};
static constexpr Color CYAN {0.0f, 1.0f, 1.0f, -1.0f};
static constexpr Color WHITE {1.0f, 1.0f, 1.0f, -1.0f};
Point viewport = {0, 0};
const Config config;
SoLoud::Soloud soloud = {};
READONLY(SDL_Window *, window, nullptr);
READONLY(SDL_Renderer *, renderer, nullptr);
READONLY(SDL_Texture *, target, nullptr);
READONLY(unsigned long, tick, 0);
READONLY(Color, drawColor, Color({0, 0, 0, 1}));
public:
explicit FLD(const Config& config);
explicit FLD(const Config&& config);
~FLD();
[[nodiscard]] Error init();
[[nodiscard]] Error init(MainLoop main_loop, void *udata=nullptr);
void run(MainLoop main_loop, void *udata = nullptr);
[[nodiscard]] Error drawBegin() const;
[[nodiscard]] Error drawEnd();
Error drawSetColor(const Color& c);
Error drawClear() const;
Error drawPoint(const Point& p) const;
Error drawLine(const Point& p0, const Point& p1) const;
Error drawRectangle(const Rectangle& rect, Uint flags=NONE) const;
[[nodiscard]] Image& image(const std::string& path);
[[nodiscard]] InputState keyGet(SDL_Scancode sc) const;
[[nodiscard]] bool keyDown(SDL_Scancode sc) const;
[[nodiscard]] bool keyUp(SDL_Scancode sc) const;
[[nodiscard]] bool keyPressed(SDL_Scancode sc) const;
[[nodiscard]] bool keyReleased(SDL_Scancode sc) const;
[[nodiscard]] InputState mouseGet(Uint8 btn) const;
[[nodiscard]] bool mouseDown(Uint8 btn) const;
[[nodiscard]] bool mouseUp(Uint8 btn) const;
[[nodiscard]] bool mousePressed(Uint8 btn) const;
[[nodiscard]] bool mouseReleased(Uint8 btn) const;
[[nodiscard]] InputState joyGet(Uint8 btn) const;
[[nodiscard]] bool joyDown(Uint8 btn) const;
[[nodiscard]] bool joyUp(Uint8 btn) const;
[[nodiscard]] bool joyPressed(Uint8 btn) const;
[[nodiscard]] bool joyReleased(Uint8 btn) const;
private:
bool shouldQuit = false;
struct {
bool managed = false;
Uint64 min_dt;
Uint64 next_time;
} fps;
struct {
float scale = 1.0;
int off_x = 0;
int off_y = 0;
} transform;
std::map<const std::string, Image> images = {};
std::array<InputState, SDL_NUM_SCANCODES> keystates = {};
std::array<InputState, 256> mousestates = {};
std::array<InputState, SDL_CONTROLLER_BUTTON_MAX> joystates = {};
Error sdlError(const std::string& msg="") const;
Error soloudError(SoLoud::result result) const;
[[nodiscard]] Error initBasepath() const;
[[nodiscard]] Error initWindow();
[[nodiscard]] Error initRenderer();
[[nodiscard]] Error initTarget();
[[nodiscard]] Error initSoloud();
void cycleEvents();
};
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