merge `master` into `loek/cleanup`

3 files changed, 227 insertions, 92 deletions

diff --git a/src/crepe/facade/DB.cpp b/src/crepe/facade/DB.cpp
index 405f7c4..0805a08 100644
--- a/src/crepe/facade/DB.cpp
+++ b/src/crepe/facade/DB.cpp
@@ -63,3 +63,4 @@ bool DB::has(const std::string & key) noexcept {
 	}
 	return true;
 }
+
diff --git a/src/crepe/facade/SDLContext.cpp b/src/crepe/facade/SDLContext.cpp
index 8da93e9..c4c96e2 100644
--- a/src/crepe/facade/SDLContext.cpp
+++ b/src/crepe/facade/SDLContext.cpp
@@ -1,16 +1,22 @@
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_image.h>
+#include <SDL2/SDL_rect.h>
 #include <SDL2/SDL_render.h>
 #include <SDL2/SDL_surface.h>
 #include <SDL2/SDL_video.h>
 #include <cmath>
 #include <cstddef>
+#include <functional>
 #include <iostream>
+#include <memory>
+#include <string>
+#include <utility>
 
 #include "../api/Sprite.h"
 #include "../api/Texture.h"
 #include "../api/Transform.h"
 #include "../util/log.h"
+#include "Exception.h"
 
 #include "SDLContext.h"
 
@@ -21,34 +27,6 @@ SDLContext & SDLContext::get_instance() {
 	return instance;
 }
 
-void SDLContext::handle_events(bool & running) {
-	SDL_Event event;
-	while (SDL_PollEvent(&event)) {
-		if (event.type == SDL_QUIT) {
-			running = false;
-		}
-	}
-}
-
-SDLContext::~SDLContext() {
-	dbg_trace();
-
-	if (this->game_renderer != nullptr)
-		SDL_DestroyRenderer(this->game_renderer);
-
-	if (this->game_window != nullptr) {
-		SDL_DestroyWindow(this->game_window);
-	}
-
-	// TODO: how are we going to ensure that these are called from the same
-	// thread that SDL_Init() was called on? This has caused problems for me
-	// before.
-	IMG_Quit();
-	SDL_Quit();
-}
-
-void SDLContext::clear_screen() { SDL_RenderClear(this->game_renderer); }
-
 SDLContext::SDLContext() {
 	dbg_trace();
 	// FIXME: read window defaults from config manager
@@ -59,26 +37,32 @@ SDLContext::SDLContext() {
 				  << std::endl;
 		return;
 	}
-
-	this->game_window = SDL_CreateWindow(
+	SDL_Window * tmp_window = SDL_CreateWindow(
 		"Crepe Game Engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
-		1920, 1080, SDL_WINDOW_SHOWN);
-	if (!this->game_window) {
+		this->viewport.w, this->viewport.h, 0);
+	if (!tmp_window) {
 		// FIXME: throw exception
 		std::cerr << "Window could not be created! SDL_Error: "
 				  << SDL_GetError() << std::endl;
+		return;
 	}
+	this->game_window
+		= {tmp_window, [](SDL_Window * window) { SDL_DestroyWindow(window); }};
 
-	this->game_renderer
-		= SDL_CreateRenderer(this->game_window, -1, SDL_RENDERER_ACCELERATED);
-	if (!this->game_renderer) {
+	SDL_Renderer * tmp_renderer = SDL_CreateRenderer(
+		this->game_window.get(), -1, SDL_RENDERER_ACCELERATED);
+	if (!tmp_renderer) {
 		// FIXME: throw exception
 		std::cerr << "Renderer could not be created! SDL_Error: "
 				  << SDL_GetError() << std::endl;
-		SDL_DestroyWindow(this->game_window);
+		SDL_DestroyWindow(this->game_window.get());
 		return;
 	}
 
+	this->game_renderer = {tmp_renderer, [](SDL_Renderer * renderer) {
+							   SDL_DestroyRenderer(renderer);
+						   }};
+
 	int img_flags = IMG_INIT_PNG;
 	if (!(IMG_Init(img_flags) & img_flags)) {
 		// FIXME: throw exception
@@ -87,71 +71,123 @@ SDLContext::SDLContext() {
 	}
 }
 
-void SDLContext::present_screen() { SDL_RenderPresent(this->game_renderer); }
+SDLContext::~SDLContext() {
+	dbg_trace();
 
-void SDLContext::draw(const Sprite & sprite, const Transform & transform) {
+	this->game_renderer.reset();
+	this->game_window.reset();
 
-	static SDL_RendererFlip render_flip
+	// TODO: how are we going to ensure that these are called from the same
+	// thread that SDL_Init() was called on? This has caused problems for me
+	// before.
+	IMG_Quit();
+	SDL_Quit();
+}
+
+void SDLContext::handle_events(bool & running) {
+	//TODO: wouter i need events
+	/*
+	SDL_Event event;
+	SDL_PollEvent(&event);
+	switch (event.type) {
+		case SDL_QUIT:
+			running = false;
+			break;
+		case SDL_KEYDOWN:
+			triggerEvent(KeyPressedEvent(getCustomKey(event.key.keysym.sym)));
+			break;
+		case SDL_MOUSEBUTTONDOWN:
+			int x, y;
+			SDL_GetMouseState(&x, &y);
+			triggerEvent(MousePressedEvent(x, y));
+			break;
+	}
+	*/
+}
+
+void SDLContext::clear_screen() { SDL_RenderClear(this->game_renderer.get()); }
+void SDLContext::present_screen() {
+	SDL_RenderPresent(this->game_renderer.get());
+}
+
+void SDLContext::draw(const Sprite & sprite, const Transform & transform,
+					  const Camera & cam) {
+
+	SDL_RendererFlip render_flip
 		= (SDL_RendererFlip) ((SDL_FLIP_HORIZONTAL * sprite.flip.flip_x)
 							  | (SDL_FLIP_VERTICAL * sprite.flip.flip_y));
 
-	int w, h;
-	SDL_QueryTexture(sprite.sprite_image->texture, NULL, NULL, &w, &h);
-	// needs maybe camera for position
+	double adjusted_x = (transform.position.x - cam.x) * cam.zoom;
+	double adjusted_y = (transform.position.y - cam.y) * cam.zoom;
+	double adjusted_w = sprite.sprite_rect.w * transform.scale * cam.zoom;
+	double adjusted_h = sprite.sprite_rect.h * transform.scale * cam.zoom;
+
+	SDL_Rect srcrect = {
+		.x = sprite.sprite_rect.x,
+		.y = sprite.sprite_rect.y,
+		.w = sprite.sprite_rect.w,
+		.h = sprite.sprite_rect.h,
+	};
+
 	SDL_Rect dstrect = {
-		.x = static_cast<int>(transform.position.x),
-		.y = static_cast<int>(transform.position.y),
-		.w = static_cast<int>(w * transform.scale),
-		.h = static_cast<int>(h * transform.scale),
+		.x = static_cast<int>(adjusted_x),
+		.y = static_cast<int>(adjusted_y),
+		.w = static_cast<int>(adjusted_w),
+		.h = static_cast<int>(adjusted_h),
 	};
 
-	double degrees = transform.rotation * 180 / M_PI;
-	SDL_RenderCopyEx(this->game_renderer, sprite.sprite_image->texture, NULL,
-					 &dstrect, degrees, NULL, render_flip);
+	SDL_RenderCopyEx(this->game_renderer.get(),
+					 sprite.sprite_image->texture.get(), &srcrect,
+
+					 &dstrect, transform.rotation, NULL, render_flip);
 }
 
-/*
-SDL_Texture * SDLContext::setTextureFromPath(const char * path, SDL_Rect & clip,
-											 const int row, const int col) {
-	dbg_trace();
+void SDLContext::camera(const Camera & cam) {
+	this->viewport.w = static_cast<int>(cam.aspect_width);
+	this->viewport.h = static_cast<int>(cam.aspect_height);
+	this->viewport.x = static_cast<int>(cam.x) - (SCREEN_WIDTH / 2);
+	this->viewport.y = static_cast<int>(cam.y) - (SCREEN_HEIGHT / 2);
 
-	SDL_Surface * tmp = IMG_Load(path);
-	if (!tmp) {
-		std::cerr << "Error surface " << IMG_GetError << std::endl;
-	}
+	SDL_SetRenderDrawColor(this->game_renderer.get(), cam.bg_color.r,
+						   cam.bg_color.g, cam.bg_color.b, cam.bg_color.a);
+}
 
-	clip.
-		w = tmp->w / col;
-	clip.h = tmp->h / row;
+uint64_t SDLContext::get_ticks() const { return SDL_GetTicks64(); }
 
-	SDL_Texture * CreatedTexture
-		= SDL_CreateTextureFromSurface(this->game_renderer, tmp);
+std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
+SDLContext::texture_from_path(const std::string & path) {
 
-	if (!CreatedTexture) {
-		std::cerr << "Error could not create texture " << IMG_GetError
-				  << std::endl;
+	SDL_Surface * tmp = IMG_Load(path.c_str());
+	if (tmp == nullptr) {
+		throw Exception("surface cannot be load from %s", path.c_str());
 	}
-	SDL_FreeSurface(tmp);
 
-	return CreatedTexture;
-}
-*/
+	std::unique_ptr<SDL_Surface, std::function<void(SDL_Surface *)>>
+		img_surface;
+	img_surface
+		= {tmp, [](SDL_Surface * surface) { SDL_FreeSurface(surface); }};
 
-SDL_Texture * SDLContext::texture_from_path(const char * path) {
-	dbg_trace();
+	SDL_Texture * tmp_texture = SDL_CreateTextureFromSurface(
+		this->game_renderer.get(), img_surface.get());
 
-	SDL_Surface * tmp = IMG_Load(path);
-	if (!tmp) {
-		std::cerr << "Error surface " << IMG_GetError << std::endl;
+	if (tmp_texture == nullptr) {
+		throw Exception("Texture cannot be load from %s", path.c_str());
 	}
-	SDL_Texture * created_texture
-		= SDL_CreateTextureFromSurface(this->game_renderer, tmp);
 
-	if (!created_texture) {
-		std::cerr << "Error could not create texture " << IMG_GetError
-				  << std::endl;
-	}
-	SDL_FreeSurface(tmp);
+	std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
+		img_texture;
+	img_texture = {tmp_texture,
+				   [](SDL_Texture * texture) { SDL_DestroyTexture(texture); }};
 
-	return created_texture;
+	return img_texture;
+}
+int SDLContext::get_width(const Texture & ctx) const {
+	int w;
+	SDL_QueryTexture(ctx.texture.get(), NULL, NULL, &w, NULL);
+	return w;
+}
+int SDLContext::get_height(const Texture & ctx) const {
+	int h;
+	SDL_QueryTexture(ctx.texture.get(), NULL, NULL, NULL, &h);
+	return h;
 }
diff --git a/src/crepe/facade/SDLContext.h b/src/crepe/facade/SDLContext.h
index f1ba8a6..e358c21 100644
--- a/src/crepe/facade/SDLContext.h
+++ b/src/crepe/facade/SDLContext.h
@@ -1,48 +1,146 @@
 #pragma once
 
+#include <SDL2/SDL_keycode.h>
 #include <SDL2/SDL_render.h>
 #include <SDL2/SDL_video.h>
+#include <functional>
+#include <memory>
+#include <string>
 
 #include "../api/Sprite.h"
 #include "../api/Transform.h"
-#include "../system/RenderSystem.h"
+#include "api/Camera.h"
+
+// FIXME: this needs to be removed
+const int SCREEN_WIDTH = 640;
+const int SCREEN_HEIGHT = 480;
 
 namespace crepe {
 
+// TODO: SDL_Keycode is defined in a header not distributed with crepe, which
+// means this typedef is unusable when crepe is packaged. Wouter will fix this
+// later.
+typedef SDL_Keycode CREPE_KEYCODES;
+
 class Texture;
+class LoopManager;
+
+/**
+ * \class SDLContext
+ * \brief Facade for the SDL library
+ * 
+ * SDLContext is a singleton that handles the SDL window and renderer, provides methods
+ * for event handling, and rendering to the screen. It is never used directly by the user
+ */
 class SDLContext {
 
 public:
-	// singleton
+	/**
+	 * \brief Gets the singleton instance of SDLContext.
+	 * \return Reference to the SDLContext instance.
+	 */
 	static SDLContext & get_instance();
+
 	SDLContext(const SDLContext &) = delete;
 	SDLContext(SDLContext &&) = delete;
 	SDLContext & operator=(const SDLContext &) = delete;
 	SDLContext & operator=(SDLContext &&) = delete;
 
-	//TODO decide events wouter?
-
 private:
+	//! will only use handle_events
+	friend class LoopManager;
+	/**
+	 * \brief Handles SDL events such as window close and input.
+	 * \param running Reference to a boolean flag that controls the main loop.
+	 */
 	void handle_events(bool & running);
 
 private:
+	//! Will only use get_ticks
+	friend class AnimatorSystem;
+
+	/**
+	 * \brief Gets the current SDL ticks since the program started.
+	 * \return Current ticks in milliseconds as a constant uint64_t.
+	 */
+	uint64_t get_ticks() const;
+
+private:
+	/**
+	 * \brief Constructs an SDLContext instance.
+	 * Initializes SDL, creates a window and renderer.
+	 */
 	SDLContext();
-	virtual ~SDLContext();
+
+	/**
+	 * \brief Destroys the SDLContext instance.
+	 * Cleans up SDL resources, including the window and renderer.
+	 */
+	~SDLContext();
 
 private:
+	//! Will use the funtions: texture_from_path, get_width,get_height.
 	friend class Texture;
-	SDL_Texture * texture_from_path(const char *);
-	//SDL_Texture* setTextureFromPath(const char*, SDL_Rect& clip, const int row, const int col);
+
+	//! Will use the funtions: texture_from_path, get_width,get_height.
+	friend class Animator;
+
+	/**
+	 * \brief Loads a texture from a file path.
+	 * \param path Path to the image file.
+	 * \return Pointer to the created SDL_Texture.
+	 */
+	std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
+	texture_from_path(const std::string & path);
+	/**
+	 * \brief Gets the width of a texture.
+	 * \param texture Reference to the Texture object.
+	 * \return Width of the texture as an integer.
+	 */
+	int get_width(const Texture &) const;
+
+	/**
+	 * \brief Gets the height of a texture.
+	 * \param texture Reference to the Texture object.
+	 * \return Height of the texture as an integer.
+	 */
+	int get_height(const Texture &) const;
 
 private:
+	//! Will use draw,clear_screen, present_screen, camera.
 	friend class RenderSystem;
-	void draw(const Sprite &, const Transform &);
+
+	/**
+	 * \brief Draws a sprite to the screen using the specified transform and camera.
+	 * \param sprite Reference to the Sprite to draw.
+	 * \param transform Reference to the Transform for positioning.
+	 * \param camera Reference to the Camera for view adjustments.
+	 */
+	void draw(const Sprite & sprite, const Transform & transform,
+			  const Camera & camera);
+
+	//! Clears the screen, preparing for a new frame.
 	void clear_screen();
+
+	//! Presents the rendered frame to the screen.
 	void present_screen();
 
+	/**
+	 * \brief Sets the current camera for rendering.
+	 * \param camera Reference to the Camera object.
+	 */
+	void camera(const Camera & camera);
+
 private:
-	SDL_Window * game_window = nullptr;
-	SDL_Renderer * game_renderer = nullptr;
+	//! sdl Window
+	std::unique_ptr<SDL_Window, std::function<void(SDL_Window *)>> game_window;
+
+	//! renderer for the crepe engine
+	std::unique_ptr<SDL_Renderer, std::function<void(SDL_Renderer *)>>
+		game_renderer;
+
+	//! viewport for the camera window
+	SDL_Rect viewport = {0, 0, 640, 480};
 };
 
 } // namespace crepe