Finally we dont recalculate numbers if we dont have to. Boring but doesnt peg...

Finally we dont recalculate numbers if we dont have to. Boring but doesnt peg hardware, should impliment some sort of bencmark or whatever.

src/mandelbrot.c

@@ -121,6 +121,7 @@ render_cl(Array *arr, App *app, ViewInfo view) {
         arr->pointer = realloc(arr->pointer, app->win_height * app->win_width * sizeof(Color));
         arr->size = app->win_height * app->win_width * sizeof(Color);
     }
+    if (app->needs_recalc)
         calculate_set(arr, app->win_height, app->win_width, view); 
     
     update_texture(app, arr);
@@ -150,7 +151,8 @@ main(void)
                 SDL_TEXTUREACCESS_STREAMING,
                 SCREEN_WIDTH, SCREEN_HEIGHT),
         SCREEN_HEIGHT,
-        SCREEN_WIDTH
+        SCREEN_WIDTH,
+        1
             };
 
     ViewInfo view = {
@@ -200,6 +202,7 @@ main(void)
                         SDL_PIXELFORMAT_RGBA8888,
                         SDL_TEXTUREACCESS_STREAMING,
                         app.win_width, app.win_height);
+                        app.needs_recalc = 1;
                     }
                     break;
                 case SDL_KEYDOWN:
@@ -215,6 +218,8 @@ main(void)
                                 view.y_min= view.y_min * 1.1;
                                 view.y_max = view.y_max * 1.1;
                                 view.zoom = view.zoom * 1.1;
+
+                                app.needs_recalc = 1;
                                 break;
                             case SDL_SCANCODE_EQUALS:
                                 view.x_min = view.x_min * 0.9;
@@ -222,6 +227,8 @@ main(void)
                                 view.y_min= view.y_min * 0.9;
                                 view.y_max = view.y_max * 0.9;
                                 view.zoom = view.zoom * 0.9;
+
+                                app.needs_recalc = 1;
                                 break;
                             case SDL_SCANCODE_R:
                                 view.x_min = -2.0;
@@ -229,10 +236,14 @@ main(void)
                                 view.y_min = -1.5;
                                 view.y_max = 1.5;
                                 view.zoom = 1.0;
+
+
+                                app.needs_recalc = 1;
                                 break;
                         }
                 default:
-                    handle_mouse(event, &mouse, &view);
+                    //returns one if recalc needed
+                    app.needs_recalc = app.needs_recalc == 0 ? handle_mouse(event, &mouse, &view) : 1;
                     break;
             }
         }
@@ -255,6 +266,7 @@ main(void)
         render_ui(&ui, app.renderer, view, fps);
 
         SDL_RenderPresent(app.renderer); 
+        app.needs_recalc = 0;
     }
         //SDL_FreeSurface(app.surfaceA);
         free(screen.pointer);

src/mandelbrot.h

@@ -19,6 +19,7 @@ typedef struct{
     SDL_Texture *texture;
     int win_height;
     int win_width;
+    short unsigned int needs_recalc;
 } App ;
 
 typedef struct{

src/mouse.c

 #include "mandelbrot.h"
 
-void
+unsigned short int
 handle_mouse(SDL_Event event, Mouse* mouse, ViewInfo* view) {
+    unsigned short int needs_recalc = 0;
     switch (event.type) {
         case SDL_MOUSEBUTTONDOWN:
             if (event.button.button == SDL_BUTTON_LEFT) {
@@ -34,6 +35,8 @@ handle_mouse(SDL_Event event, Mouse* mouse, ViewInfo* view) {
                 view->y_max = mouse_imag + (view->y_max - mouse_imag) * zoom_factor;
                 
                 view->zoom *= (1.0 / zoom_factor);
+
+                needs_recalc = 1; 
             }
             break;
             
@@ -49,8 +52,10 @@ handle_mouse(SDL_Event event, Mouse* mouse, ViewInfo* view) {
                 view->x_max = mouse->original_view.x_max - dx * scale_x;
                 view->y_min = mouse->original_view.y_min - dy * scale_y;
                 view->y_max = mouse->original_view.y_max - dy * scale_y;
+                needs_recalc = 1; 
             }
             break;
     }
+    return  needs_recalc;
 }
 

src/mouse.h

@@ -3,6 +3,6 @@
 #include "mandelbrot.h"
 #include <SDL2/SDL_events.h>
 
-void handle_mouse(SDL_Event, Mouse*, ViewInfo*);
+unsigned short int handle_mouse(SDL_Event, Mouse*, ViewInfo*);
 
 #endif