From b770475741b7c33d57331f3139c55a3f237ad274 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Tue, 5 Nov 2024 16:03:48 +0100
Subject: create facade folder

---
 src/crepe/facade/SDLContext.cpp | 157 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 src/crepe/facade/SDLContext.cpp

(limited to 'src/crepe/facade/SDLContext.cpp')

diff --git a/src/crepe/facade/SDLContext.cpp b/src/crepe/facade/SDLContext.cpp
new file mode 100644
index 0000000..8da93e9
--- /dev/null
+++ b/src/crepe/facade/SDLContext.cpp
@@ -0,0 +1,157 @@
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include <SDL2/SDL_render.h>
+#include <SDL2/SDL_surface.h>
+#include <SDL2/SDL_video.h>
+#include <cmath>
+#include <cstddef>
+#include <iostream>
+
+#include "../api/Sprite.h"
+#include "../api/Texture.h"
+#include "../api/Transform.h"
+#include "../util/log.h"
+
+#include "SDLContext.h"
+
+using namespace crepe;
+
+SDLContext & SDLContext::get_instance() {
+	static SDLContext 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
+
+	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+		// FIXME: throw exception
+		std::cerr << "SDL could not initialize! SDL_Error: " << SDL_GetError()
+				  << std::endl;
+		return;
+	}
+
+	this->game_window = SDL_CreateWindow(
+		"Crepe Game Engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+		1920, 1080, SDL_WINDOW_SHOWN);
+	if (!this->game_window) {
+		// FIXME: throw exception
+		std::cerr << "Window could not be created! SDL_Error: "
+				  << SDL_GetError() << std::endl;
+	}
+
+	this->game_renderer
+		= SDL_CreateRenderer(this->game_window, -1, SDL_RENDERER_ACCELERATED);
+	if (!this->game_renderer) {
+		// FIXME: throw exception
+		std::cerr << "Renderer could not be created! SDL_Error: "
+				  << SDL_GetError() << std::endl;
+		SDL_DestroyWindow(this->game_window);
+		return;
+	}
+
+	int img_flags = IMG_INIT_PNG;
+	if (!(IMG_Init(img_flags) & img_flags)) {
+		// FIXME: throw exception
+		std::cout << "SDL_image could not initialize! SDL_image Error: "
+				  << IMG_GetError() << std::endl;
+	}
+}
+
+void SDLContext::present_screen() { SDL_RenderPresent(this->game_renderer); }
+
+void SDLContext::draw(const Sprite & sprite, const Transform & transform) {
+
+	static 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
+	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),
+	};
+
+	double degrees = transform.rotation * 180 / M_PI;
+	SDL_RenderCopyEx(this->game_renderer, sprite.sprite_image->texture, NULL,
+					 &dstrect, degrees, NULL, render_flip);
+}
+
+/*
+SDL_Texture * SDLContext::setTextureFromPath(const char * path, SDL_Rect & clip,
+											 const int row, const int col) {
+	dbg_trace();
+
+	SDL_Surface * tmp = IMG_Load(path);
+	if (!tmp) {
+		std::cerr << "Error surface " << IMG_GetError << std::endl;
+	}
+
+	clip.
+		w = tmp->w / col;
+	clip.h = tmp->h / row;
+
+	SDL_Texture * CreatedTexture
+		= SDL_CreateTextureFromSurface(this->game_renderer, tmp);
+
+	if (!CreatedTexture) {
+		std::cerr << "Error could not create texture " << IMG_GetError
+				  << std::endl;
+	}
+	SDL_FreeSurface(tmp);
+
+	return CreatedTexture;
+}
+*/
+
+SDL_Texture * SDLContext::texture_from_path(const char * path) {
+	dbg_trace();
+
+	SDL_Surface * tmp = IMG_Load(path);
+	if (!tmp) {
+		std::cerr << "Error surface " << IMG_GetError << std::endl;
+	}
+	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);
+
+	return created_texture;
+}
-- 
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