From cbe861693e33999c11e46fb679d544a23ddb1da8 Mon Sep 17 00:00:00 2001
From: tulpenkiste <noctaliavibing@gmail.com>
Date: Sun, 21 May 2023 14:02:53 +0100
Subject: [PATCH] Initial rendering

---
 .gitignore                                    |  5 +-
 engine/source/math/types.d                    |  4 +-
 engine/source/renderer/renderer.d             | 13 ++++-
 .../rsdl/source/gameengine_rsdl/package.d     | 48 +++++++++++++++++++
 test/source/app.d                             |  8 +++-
 5 files changed, 71 insertions(+), 7 deletions(-)

diff --git a/.gitignore b/.gitignore
index a638545..c1a633e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,9 @@
 # Directories
 .dub
 */docs/
+.vscode
+
+# Files
 *.so
 *.dylib
 *.dll
@@ -13,8 +16,6 @@
 *.o
 *.obj
 *.lst
-
-# Files
 docs.json
 __dummy.html
 dub.selections.json
\ No newline at end of file
diff --git a/engine/source/math/types.d b/engine/source/math/types.d
index 0fd7241..dc7fb02 100644
--- a/engine/source/math/types.d
+++ b/engine/source/math/types.d
@@ -3,9 +3,9 @@ module gameengine.math.types;
 // Structs
 /// Image
 
-// RGBA value struct
+// RGBA value struct. Value is between 0 and 255
 struct Color {
-	float r, g, b, a;
+	ubyte r, g, b, a;
 }
 
 // 2D
diff --git a/engine/source/renderer/renderer.d b/engine/source/renderer/renderer.d
index d0efe06..1036213 100644
--- a/engine/source/renderer/renderer.d
+++ b/engine/source/renderer/renderer.d
@@ -1,5 +1,16 @@
 module gameengine.renderer.renderer;
 
+import gameengine.math.types;
+
 abstract class Renderer {
-	void setWindowTitle(string str);
+	// Draw
+	void clearScreen(Color);
+	void renderCurrent();
+
+	// Pre and Post draw
+	void preDraw();
+	void postDraw();
+
+	// Util
+	void setWindowTitle(string);
 }
\ No newline at end of file
diff --git a/renderer/rsdl/source/gameengine_rsdl/package.d b/renderer/rsdl/source/gameengine_rsdl/package.d
index 5dd1e9a..f12b438 100644
--- a/renderer/rsdl/source/gameengine_rsdl/package.d
+++ b/renderer/rsdl/source/gameengine_rsdl/package.d
@@ -1,7 +1,55 @@
 module gameengine_rsdl;
 
+import bindbc.sdl;
 import gameengine.renderer.renderer;
+import gameengine.math.types;
+import std.exception;
+import std.format;
 
 class RSDL : Renderer {
+	this(char* title, IntVec2 size) {
+		const SDLSupport ret = loadSDL();
+		if(ret != sdlSupport) {
+			throw new Exception("Couldn't load SDL");
+		}
+
+		SDL_Init(SDL_INIT_VIDEO);
+
+		window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, size.x, size.y, SDL_WINDOW_RESIZABLE);
+
+		if (window is null) {
+			string error = format("Couldn't create window! what: %d", SDL_GetError());
+			throw new Exception(error);
+		}
+
+		renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+
+		if (renderer is null) {
+			string error = format("Couldn't create renderer! what: %d", SDL_GetError());
+			throw new Exception(error);
+		}
+	}
+
+	~this() {
+		SDL_DestroyRenderer(renderer);
+		SDL_DestroyWindow(window);
+		SDL_Quit();
+	}
+
+	override void clearScreen(Color col = Color(0, 0, 0, 1)) {
+		SDL_SetRenderDrawColor(renderer, col.r, col.g, col.b, col.a);
+		SDL_RenderClear(renderer);
+	}
+
+	override void renderCurrent() {
+		SDL_RenderPresent(renderer);
+	}
+
+	override void preDraw() {}
+	override void postDraw() {}
+
 	override void setWindowTitle(string title) {}
+
+	private SDL_Window* window;
+	private SDL_Renderer* renderer;
 }
\ No newline at end of file
diff --git a/test/source/app.d b/test/source/app.d
index c2713a8..67033f9 100644
--- a/test/source/app.d
+++ b/test/source/app.d
@@ -1,17 +1,21 @@
 import std.stdio;
 
 import gameengine.core.engine;
+import gameengine.math.types;
 import gameengine.renderer.renderer;
 import gameengine_rsdl;
 
 import core.thread;
+import std.string : toStringz;
 
 void main() {
-	Renderer renderer = new RSDL();
+	Renderer renderer = new RSDL(cast(char*)toStringz("test".dup), IntVec2(800, 600));
 	Engine engine = new Engine(renderer);
 
 	while (true) {
 		engine.runNodeProcesses();
-		Thread.sleep(1.msecs);
+		renderer.clearScreen(Color(255, 0, 255, 255));
+		renderer.renderCurrent();
+		Thread.sleep(16.msecs);
 	}
 }