refactor: extract screen management from main into a module

1 files changed, 87 insertions, 0 deletions

diff --git a/src/screen.c b/src/screen.c
new file mode 100644
index 0000000..52dec55
--- /dev/null
+++ b/src/screen.c
@@ -0,0 +1,87 @@
+/*
+* Copyright (c) 2021, Fabio Maciel
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice, this
+*    list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+*    this list of conditions and the following disclaimer in the documentation
+*    and/or other materials provided with the distribution.
+*
+* 3. Neither the name of the copyright holder nor the names of its
+*    contributors may be used to endorse or promote products derived from
+*    this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "screen.h"
+
+#include <stdint.h>
+#include <assert.h>
+#include <SDL.h>
+
+const int SCREEN_WIDTH  = 640;
+const int SCREEN_HEIGHT = 480;
+
+bool
+screen_init(screen_t* screen)
+{
+  assert(screen && "screen is required");
+
+  screen->width = SCREEN_WIDTH;
+  screen->height = SCREEN_HEIGHT;
+
+  screen->window = SDL_CreateWindow(
+      "Blast Attack",
+      SDL_WINDOWPOS_UNDEFINED,
+      SDL_WINDOWPOS_UNDEFINED,
+      screen->width, screen->height,
+      SDL_WINDOW_RESIZABLE
+  );
+
+  if (screen->window == NULL) {
+    fprintf(stderr, "Window could not be created! SDL_Error: %s\n", SDL_GetError());
+    return false;
+  }
+
+  screen->renderer = SDL_CreateRenderer(screen->window, -1, SDL_RENDERER_ACCELERATED);
+  if (screen->renderer == NULL) {
+    fprintf(stderr, "Could not create renderer: %s\n", SDL_GetError());
+    return false;
+  }
+
+  if (SDL_RenderSetLogicalSize(screen->renderer, screen->width, screen->height) < 0) {
+    fprintf(stderr, "Could not set logical size: %s\n", SDL_GetError());
+    return false;
+  }
+
+  return true;
+}
+
+void
+screen_reset(screen_t *screen)
+{
+  SDL_SetRenderDrawColor(screen->renderer, 0, 0, 0, 1);
+  SDL_RenderClear(screen->renderer);
+}
+
+void
+screen_destroy(screen_t *screen)
+{
+  SDL_DestroyRenderer(screen->renderer);
+  SDL_DestroyWindow(screen->window);
+}