Basic explorer with window resize, iterations change, moving around

1 files changed, 61 insertions, 4 deletions

diff --git a/src/state.c b/src/state.c
index ee68b77..395d590 100644
--- a/src/state.c
+++ b/src/state.c
@@ -10,10 +10,26 @@ bool	state_init(State *state)
 		SDL_WINDOWPOS_UNDEFINED,
 		MANDEL_WINDOW_WIDTH,
 		MANDEL_WINDOW_HEIGHT,
-		0));
+		SDL_WINDOW_RESIZABLE
+	));
     SDL_CALL(state->renderer = SDL_CreateRenderer(state->window, -1, 0));
+	SDL_CALL(state->texture = SDL_CreateTexture(
+		state->renderer,
+		SDL_PIXELFORMAT_RGB888,
+		SDL_TEXTUREACCESS_STREAMING,
+		MANDEL_WINDOW_WIDTH,
+		MANDEL_WINDOW_HEIGHT
+	));
+	state->palette = color_palette_new(NULL, MANDEL_ITERATIONS);
+	if (state->palette == NULL)
+		return false;
+	state->iterations = MANDEL_ITERATIONS;
+	state->real_start = -2.0;
+	state->real_end = 2.0;
+	state->imag_start = -2.0;
+	state->imag_end = 2.0;
     state->running = true;
-    return state;
+    return true;
 }
 
 void	state_run(State *state)
@@ -21,13 +37,54 @@ void	state_run(State *state)
     while (state->running)
     {
         event_handle(state);
+
+		double	real_step;
+		double	imag_step;
+		double	real;
+		double	imag;
+		void	*pixels;
+		int		pitch;
+		int		width;
+		int		height;
+
+		SDL_CALL(SDL_LockTexture(state->texture, NULL, &pixels, &pitch));
+		SDL_CALL(SDL_QueryTexture(state->texture, NULL, NULL, &width, &height));
+
+		real_step = (state->real_end - state->real_start) / width;
+		imag_step = (state->imag_end - state->imag_start) / height;
+		imag = state->imag_start;
+
+		uint32_t render_start_time = SDL_GetTicks();
+
+		for (int i = 0; i < height; i++)
+		{
+			real = state->real_start;
+			for (int j = 0; j < width; j++)
+			{
+				int n = mandelbrot(real, imag, state->iterations);
+				Color c = state->palette[n];
+				((Color*)pixels)[i * width + j] = c;
+				real += real_step;
+			}
+			imag += imag_step;
+		}
+
+		uint32_t render_end_time = SDL_GetTicks();
+
+		printf("%ums\r", (render_end_time - render_start_time));
+		fflush(stdout);
+
+		SDL_UnlockTexture(state->texture);
+		SDL_CALL(SDL_RenderCopy(state->renderer, state->texture, NULL, NULL));
+		SDL_RenderPresent(state->renderer);
+		SDL_Delay(3);
     }
 }
 
 void	state_quit(State *state)
 {
-    /* free(state->palette); */
-    /* SDL_FreeSurface(state->surface); */
+    free(state->palette);
+	SDL_DestroyTexture(state->texture);
     SDL_DestroyRenderer(state->renderer);
     SDL_DestroyWindow(state->window);
 	SDL_Quit();