From fbf18999c6922ba357a10b15c39eaf20b7a9bffa Mon Sep 17 00:00:00 2001
From: Alejandro Laguna <alejandro.laguna@proton.me>
Date: Wed, 15 Jul 2026 10:39:51 +0200
Subject: [PATCH] feat: display text with exit iteration of coordinate

---
 src/main.c | 40 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/src/main.c b/src/main.c
index f0b455140602a630397f2322fe9eca035bb201e1..73f868a2d042a3e35bd7628417e2cd8ad3180560 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,15 +1,19 @@
 #include "mandelbrot.h"
 #include <SDL3/SDL_events.h>
 #include <SDL3/SDL_init.h>
+#include <SDL3/SDL_log.h>
 #include <SDL3/SDL_oldnames.h>
 #include <SDL3/SDL_rect.h>
 #include <SDL3/SDL_render.h>
 #include <SDL3/SDL_surface.h>
 #include <SDL3/SDL_video.h>
+#include <math.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 
+extern int points[WINDOW_WIDTH * WINDOW_HEIGHT];
+
 int main(void) {
     if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS)) {
         fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
@@ -19,19 +23,31 @@ int main(void) {
     SDL_Window* window =
         SDL_CreateWindow(WINDOW_TITLE, WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_HIDDEN);
     if (window == NULL) {
-        fprintf(stderr, "CreateWindowAndRenderer failed: %s\n", SDL_GetError());
+        fprintf(stderr, "CreateWindow failed: %s\n", SDL_GetError());
         SDL_Quit();
         return -1;
     }
 
     SDL_Surface* surface = SDL_GetWindowSurface(window);
     if (!surface) {
+        fprintf(stderr, "GetWindowSurface failed: %s\n", SDL_GetError());
+        SDL_DestroyWindow(window);
+        SDL_Quit();
+        return -1;
+    }
+
+    SDL_Renderer* renderer = SDL_CreateSoftwareRenderer(surface);
+    if (renderer == NULL) {
+        fprintf(stderr, "CreateSoftwareRenderer failed: %s\n", SDL_GetError());
+        SDL_DestroyWindow(window);
+        SDL_Quit();
         return -1;
     }
+
     SDL_Event e;
     bool running = true;
-    SDL_UpdateWindowSurface(window);
     SDL_ShowWindow(window);
+
     position_t position;
     position.x_min = -2.0;
     position.x_max = 1.0;
@@ -39,13 +55,14 @@ int main(void) {
     position.y_max = 1.2;
 
     bool pos_updated = true;
+    char debug_text[256] = "";
+
     while (running) {
         while (SDL_PollEvent(&e)) {
             if (e.type == SDL_EVENT_QUIT) {
                 running = false;
             }
             if (e.type == SDL_EVENT_MOUSE_WHEEL) {
-                // 1. Get mouse pixel position
                 float mx, my;
                 SDL_GetMouseState(&mx, &my);
 
@@ -55,7 +72,6 @@ int main(void) {
                     position.y_min + (position.y_max - position.y_min) * my / (WINDOW_HEIGHT - 1);
 
                 double range_y = position.y_max - position.y_min;
-
                 float factor = (e.wheel.y > 0) ? 0.9f : 1.1f;
                 double new_height = range_y * factor;
                 double aspect = (double)WINDOW_WIDTH / WINDOW_HEIGHT;
@@ -67,16 +83,30 @@ int main(void) {
                 position.y_max = position.y_min + new_height;
                 pos_updated = true;
             }
+            if (e.type == SDL_EVENT_MOUSE_BUTTON_DOWN) {
+                float mx, my;
+                SDL_GetMouseState(&mx, &my);
+                int ix = (int)floor(mx);
+                int iy = (int)floor(my);
+                int iter = points[iy * WINDOW_WIDTH + ix];
+                snprintf(debug_text, sizeof(debug_text), "x: %d  y: %d  iterations: %d", ix, iy,
+                         iter);
+            }
         }
         if (pos_updated) {
             calculate_points(&position);
             pos_updated = false;
         }
         draw_points(surface);
+        if (debug_text[0] != '\0') {
+            SDL_SetRenderDrawColor(renderer, 64, 224, 208, 255);
+            SDL_RenderDebugText(renderer, 10, 10, debug_text);
+        }
+        SDL_RenderPresent(renderer);
         SDL_UpdateWindowSurface(window);
         SDL_Delay(16);
     }
-
+    SDL_DestroyRenderer(renderer);
     SDL_DestroyWindow(window);
     SDL_Quit();
     return 0;