1 files changed, 80 insertions, 0 deletions
diff --git a/graphics.c b/graphics.c
index e69de29..e9e12ff 100644
--- a/graphics.c
+++ b/graphics.c
@@ -0,0 +1,80 @@
+#include "header.h"
+
+#define WINDOW_TITLE "Mandelbrot"
+#define WINDOW_X 20
+#define WINDOW_Y 20
+
+static void event_handler(GState *state);
+static void destroy_state(GState *state);
+static void error_exit_state(GState *state, const char *msg);
+static void error_exit(const char *msg);
+
+GState *graphics_init(GConf *conf)
+{
+    GState *state = (GState*)malloc(sizeof(GState));
+    if (state == NULL)
+        return NULL;
+    if (SDL_Init(SDL_INIT_VIDEO) < 0)
+        error_exit("unable to init SDL");
+    state->window = SDL_CreateWindow(WINDOW_TITLE, WINDOW_X, WINDOW_Y,
+                                     conf->window_width, conf->window_height, 0);
+    if (state->window == NULL)
+        error_exit("unable to create window");
+    state->renderer = SDL_CreateRenderer(state->window, -1, 0);
+    if (state->renderer == NULL)
+        error_exit_state(state, "unable to create renderer");
+    state->running = true;
+    return state;
+}
+
+void graphics_quit(GState *state)
+{
+    destroy_state(state);
+    SDL_Quit();
+}
+
+void graphics_run(GState *state)
+{
+    while (state->running)
+    {
+        event_handler(state);
+
+        SDL_Delay(10);
+    }
+}
+
+static void event_handler(GState *state)
+{
+    SDL_Event e;
+    while (SDL_PollEvent(&e))
+    {
+        switch (e.type)
+        {
+            case SDL_QUIT:
+                state->running = false;
+                break;
+        }
+    }
+}
+
+static void destroy_state(GState *state)
+{
+    if (state == NULL)
+        return;
+    SDL_DestroyRenderer(state->renderer);
+    SDL_DestroyWindow(state->window);
+    free(state);
+}
+
+static void error_exit_state(GState *state, const char *msg)
+{
+    destroy_state(state);
+    error_exit(msg);
+}
+
+static void error_exit(const char *msg)
+{
+    SDL_Log("ERROR: %s: %s", SDL_GetError(), msg);
+    SDL_Quit();
+    exit(EXIT_FAILURE);
+}