Renderer

src/renderer.c

@@ -0,0 +1,113 @@
+#include "renderer.h"
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_blendmode.h>
+#include <SDL2/SDL_rect.h>
+#include <SDL2/SDL_render.h>
+#include <SDL2/SDL_timer.h>
+#include <bits/pthreadtypes.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <math.h>
+#include <pthread.h>
+
+typedef struct RenderItem {
+	RenderObject_t object;
+	SDL_Texture * cache;
+	SDL_Rect rect;
+	RenderId_t id;
+} RenderItem_t;
+
+RenderItem_t * objects = NULL;
+int objectCount = 0;
+int objectStorageSize = 0;
+MonitorSize_t monitorSize;
+pthread_t thread;
+SDL_Window* win;
+
+static int compartSort(const RenderItem_t * a, const RenderItem_t * b) {
+	return a->object.z - b->object.z;
+}
+
+//int (*compar)(const void [.size], const void [.size], void *)
+static void * render_thread(void *) {
+	SDL_GetRendererOutputSize(renderer, &monitorSize.width, &monitorSize.height);
+
+	objectStorageSize = 1000;
+	objects = malloc(objectStorageSize);
+
+	while(true) {
+		for(int i = 0; i < objectCount; i++) {
+			RenderItem_t * object = &objects[i];
+			if(object->cache == NULL) {
+				SDL_Texture * texture = SDL_CreateTextureFromSurface(renderer, object->object.surface);
+				SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
+				object->cache = texture;
+			}
+			SDL_RenderCopyEx(renderer, object->cache, &object->rect, NULL, object->object.angle_degre, NULL, SDL_FLIP_NONE);
+		}
+		SDL_Delay(1000 / 400); //400fps or u a pussy
+	}
+	return NULL;
+}
+
+void renderer_main() {
+	// returns zero on success else non-zero
+	if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
+		printf("error initializing SDL: %s\n", SDL_GetError());
+	}
+	win = SDL_CreateWindow("GAME", // creates a window
+									SDL_WINDOWPOS_CENTERED,
+									SDL_WINDOWPOS_CENTERED,
+									1000, 1000, 0);
+
+	Uint32 render_flags = SDL_RENDERER_ACCELERATED;
+
+	// creates a renderer to render our images
+	renderer = SDL_CreateRenderer(win, -1, render_flags);
+
+	pthread_create(&thread, NULL, render_thread, NULL);
+}
+
+RenderId_t renderer_renderObject(RenderObject_t object) {
+	RenderId_t itemId = objectCount++;
+
+	SDL_Rect rect = {
+		round(object.x * monitorSize.width),
+		round(object.y * monitorSize.height),
+		round(object.height * monitorSize.height),
+		round(object.width * monitorSize.width)
+	};
+
+	RenderItem_t item =  {
+		object,
+		NULL,
+		rect,
+		itemId
+	};
+
+	objects[itemId] = item;
+	//the objects are sorted
+	qsort(objects, objectCount, sizeof(RenderItem_t), (__compar_fn_t)compartSort);
+	return itemId;
+}
+
+void renderer_removeObject(RenderId_t id) {
+	bool found = false;
+	for(int i = 0; i < objectCount - 1; i++) {
+		if(objects[i].id == id) {
+			SDL_FreeSurface(objects[i].object.surface);
+			if(objects[i].cache != NULL) {
+				SDL_DestroyTexture(objects[i].cache);
+			}
+		}
+		if(found) {
+			objects[i] = objects[i + 1];
+		}
+	}
+	objectCount--;
+}
+
+MonitorSize_t renderer_getMonitorSize() {
+	return monitorSize;
+}