Texture rendering now works, but colors seem broken. But it works, and works better

src/mandelbrot.c

@@ -5,6 +5,7 @@
 #include <SDL2/SDL_surface.h>
 #include <SDL2/SDL_timer.h>
 #include <SDL2/SDL_video.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <SDL2/SDL.h>
 #include <complex.h>
@@ -42,9 +43,10 @@ mandelbrot(Complex c) {
 } 
 
 typedef struct{
-    short int r;
-    short int g;
-    short int b; 
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+    uint8_t a;
 } Color;
 
 typedef struct {
@@ -57,8 +59,8 @@ void
 calculate_set(Array *arr, int height, int width, ViewInfo view)
 {
     #pragma omp parallel for schedule(guided)
-    for (int x = 0; x < width; x++) {
-        for (int y = 0; y < height; y++) {
+    for (int y = 0; y < height; y++) {
+        for (int x = 0; x < width; x++) {
             double real = view.x_min + (x * (view.x_max - view.x_min)) / width;
             double imag = view.y_min + (y * (view.y_max - view.y_min)) / height;
             Complex c = {real, imag};
@@ -66,22 +68,23 @@ calculate_set(Array *arr, int height, int width, ViewInfo view)
             int iterations = mandelbrot(c);
 
             if (iterations == MAX_ITERATIONS){
-                arr->pointer[x * height + y].r = 0;
-                arr->pointer[x * height + y].g = 0;
-                arr->pointer[x * height + y].b = 0;
+                arr->pointer[y * width + x].r = 0;
+                arr->pointer[y * width + x].g = 0;
+                arr->pointer[y * width + x].b = 0;
+                arr->pointer[y * width + x].a = 0;
             } else {
                 double t = (double)iterations / MAX_ITERATIONS;
                 t = 0.5 + 0.5 * tan(log(t + 0.0001) * 3.0);
 
-                arr->pointer[x * height + y].r = 255 * t * 0.5;
-                arr->pointer[x * height + y].g = 255 * t * 0.4;
-                arr->pointer[x * height + y].b = 255 * t;
+                arr->pointer[y * width + x].r = 255 * t * 0.5;
+                arr->pointer[y * width + x].g = 255 * t * 0.4;
+                arr->pointer[y * width + x].b = 255 * t;
+                arr->pointer[y * width + x].a = 255;
             }
         }
     }
 }
 
-
 void 
 update_texture(App *app, Array *arr) {
     void *pixels;
@@ -92,21 +95,13 @@ update_texture(App *app, Array *arr) {
         return;
     }
     
-    uint32_t *dst = pixels;
-    Color *src = arr->pointer;
-    
-    for (int y = 0; y < app->win_height; y++) {
-        for (int x = 0; x < app->win_width; x++) {
-            Color c = src[x * app->win_height + y];
-            // Convert RGB to RGBA8888 format
-            *dst++ = (c.b << 0) | (c.g << 8) | (c.r << 16) | (255 << 24);
-        }
-        dst += pitch / sizeof(uint32_t) - app->win_width;
-    }
+    memcpy(pixels, arr->pointer, app->win_width * app->win_height * sizeof(Color));
     
     SDL_UnlockTexture(app->texture);
 }
 
+
+
 void 
 render_cl(Array *arr, App *app, ViewInfo view) {
     
@@ -125,40 +120,6 @@ render_cl(Array *arr, App *app, ViewInfo view) {
 }
 
 
-void 
-render(App *app, ViewInfo view, int start_x, int end_x, int start_y, int end_y) {
-    
-    SDL_SetRenderDrawColor(app->renderer, 0, 0, 50, 255);
-    SDL_RenderClear(app->renderer);
-
-    //#pragma omp parallel for schedule(guided)
-    for (int x = start_x; x < end_x; x++) {
-        for (int y = start_y; y < end_y; y++) {
-            double real = view.x_min + (x * (view.x_max - view.x_min)) / app->win_width;
-            double imag = view.y_min + (y * (view.y_max - view.y_min)) / app->win_height;
-            Complex c = {real, imag};
-            
-            int iterations = mandelbrot(c);
-
-            if (iterations == MAX_ITERATIONS){
-                SDL_SetRenderDrawColor(app->renderer, 0, 0, 0, 255);
-            } else {
-                double t = (double)iterations / MAX_ITERATIONS;
-                t = 0.5 + 0.5 * cos(log(t + 0.0001) * 3.0);
-                
-                int r = (int)(255 * t);  
-                int g = (int)(255 * t * 0.4);  
-                int b = (int)(255 * t * 0.2);        
-                
-                SDL_SetRenderDrawColor(app->renderer, r, g, b, 255);
-            }
-            SDL_RenderDrawPoint(app->renderer, x, y);
-        }
-    }
-}
-
-
-
 int
 main(void)
 {