Rack/include/window.hpp

#pragma once
#include "common.hpp"
#include "math.hpp"

#include <memory>
#include <map>
#define GLEW_STATIC
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <nanovg.h>
#define NANOVG_GL2
#include <nanovg_gl.h>
#include <nanovg_gl_utils.h>
#include <nanosvg.h>


/** Remaps Ctrl to Cmd on Mac
Use this instead of GLFW_MOD_CONTROL, since Cmd should be used on Mac in place of Ctrl on Linux/Windows.
*/
#if defined ARCH_MAC
	#define WINDOW_MOD_CTRL GLFW_MOD_SUPER
	#define WINDOW_MOD_CTRL_NAME "Cmd"
#else
	#define WINDOW_MOD_CTRL GLFW_MOD_CONTROL
	#define WINDOW_MOD_CTRL_NAME "Ctrl"
#endif
#define WINDOW_MOD_SHIFT_NAME "Shift"
#define WINDOW_MOD_ALT_NAME "Alt"

/** Filters actual mod keys from the mod flags.
Use this if you don't care about GLFW_MOD_CAPS_LOCK and GLFW_MOD_NUM_LOCK.
Example usage:
	if ((e.mod & WINDOW_MOD_MASK) == (WINDOW_MOD | GLFW_MOD_SHIFT)) ...
*/
#define WINDOW_MOD_MASK (GLFW_MOD_SHIFT | GLFW_MOD_CONTROL | GLFW_MOD_ALT | GLFW_MOD_SUPER)


namespace rack {


// Constructing these directly will load from the disk each time. Use the load() functions to load from disk and cache them as long as the shared_ptr is held.

struct Font {
	NVGcontext *vg;
	int handle = -1;
	/** Don't call this directly but instead use `APP->window->loadFont()` */
	void loadFile(const std::string &filename, NVGcontext *vg);
	~Font();
	/** Use `APP->window->loadFont()` instead. */
	DEPRECATED static std::shared_ptr<Font> load(const std::string &filename);
};

struct Image {
	NVGcontext *vg;
	int handle = -1;
	/** Don't call this directly but instead use `APP->window->loadImage()` */
	void loadFile(const std::string &filename, NVGcontext *vg);
	~Image();
	/** Use `APP->window->loadImage()` instead. */
	DEPRECATED static std::shared_ptr<Image> load(const std::string &filename);
};

struct Svg {
	NSVGimage *handle = NULL;
	/** Don't call this directly but instead use `APP->window->loadSvg()` */
	void loadFile(const std::string &filename);
	~Svg();
	/** Use `APP->window->loadSvg()` instead. */
	DEPRECATED static std::shared_ptr<Svg> load(const std::string &filename);
};

DEPRECATED typedef Svg SVG;


struct Window {
	GLFWwindow *win = NULL;
	NVGcontext *vg = NULL;
	/** The scaling ratio */
	float pixelRatio = 1.f;
	/* The ratio between the framebuffer size and the window size reported by the OS.
	This is not equal to gPixelRatio in general.
	*/
	float windowRatio = 1.f;
	int frame = 0;
	/** The last known absolute mouse position in the window */
	math::Vec mousePos;
	std::shared_ptr<Font> uiFont;
	double frameTimeStart = 0.f;

	/** Use load*() instead of modifying these directly. */
	std::map<std::string, std::weak_ptr<Font>> fontCache;
	std::map<std::string, std::weak_ptr<Image>> imageCache;
	std::map<std::string, std::weak_ptr<Svg>> svgCache;

	struct Internal;
	Internal *internal;

	Window();
	~Window();
	void run();
	void close();
	void cursorLock();
	void cursorUnlock();
	/** Gets the current keyboard mod state
	Don't call this from a Key event. Simply use `e.mods` instead.
	*/
	int getMods();
	void setFullScreen(bool fullScreen);
	bool isFullScreen();
	bool isFrameOverdue();

	std::shared_ptr<Font> loadFont(const std::string &filename);
	std::shared_ptr<Image> loadImage(const std::string &filename);
	std::shared_ptr<Svg> loadSvg(const std::string &filename);
};


void windowInit();
void windowDestroy();


} // namespace rack