Create tiled background and foreground

1 files changed, 44 insertions, 7 deletions

diff --git a/main.c b/main.c
index 0d14b64..0f5f4c7 100644
--- a/main.c
+++ b/main.c
@@ -1,14 +1,39 @@
 #include <stdio.h>
 #include <SDL2/SDL.h>
 
+#define WINDOW_W 1280
+#define WINDOW_H 720
+
+SDL_Texture *createTiledTexture(SDL_Renderer *context, const char *filename) {
+	SDL_Surface *texture_surface = SDL_LoadBMP(filename);
+	SDL_Texture *texture_tile = SDL_CreateTextureFromSurface(context, texture_surface);
+	int tile_w = texture_surface->w;
+	int tile_h = texture_surface->h;
+	SDL_FreeSurface(texture_surface);
+
+	Uint32 pixelformat;
+	SDL_QueryTexture(texture_tile, &pixelformat, 0, 0, 0);
+	SDL_Texture *texture = SDL_CreateTexture(context, pixelformat, SDL_TEXTUREACCESS_STATIC | SDL_TEXTUREACCESS_TARGET, WINDOW_W, WINDOW_H);
+	SDL_SetRenderTarget(context, texture);
+	for (int y = 0; y < WINDOW_H; y += tile_h) {
+		for (int x = 0; x < WINDOW_W; x += tile_w) {
+			SDL_Rect tile_rect = { x, y, tile_w, tile_h };
+			SDL_RenderCopy(context, texture_tile, 0, &tile_rect);
+		}
+	}
+	SDL_DestroyTexture(texture_tile);
+	SDL_SetRenderTarget(context, 0);
+	return texture;
+}
+
 int main() {
 	SDL_Init(SDL_INIT_VIDEO);
 
 	SDL_Window *window = SDL_CreateWindow("Cannons",
 			SDL_WINDOWPOS_UNDEFINED,
 			SDL_WINDOWPOS_UNDEFINED,
-			1280,
-			720,
+			WINDOW_W,
+			WINDOW_H,
 			0);
 
 	SDL_Renderer *context = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
@@ -16,13 +41,25 @@ int main() {
 	SDL_SetRenderDrawColor(context, 40, 40, 40, 255);
 	SDL_RenderClear(context);
 
-	SDL_Surface *map_surface = SDL_LoadBMP("test-map.bmp");
-	SDL_Texture *map = SDL_CreateTextureFromSurface(context, map_surface);
-	SDL_RenderCopy(context, map, 0, 0);
+	SDL_Texture *background = createTiledTexture(context, "background.bmp");
+	SDL_Texture *foreground = createTiledTexture(context, "foreground.bmp");
+
+	// TODO:
+	// - Map has a mask generated by the game, of where the terrain (foregroud) exists
 
-	SDL_RenderPresent(context);
+	int exit = 0;
+	while (!exit) {
+		SDL_Event event = {0};
+		while (SDL_PollEvent(&event)) {
+			if (event.type == SDL_QUIT) {
+				exit = 1;
+			}
+		}
+		SDL_RenderCopy(context, foreground, 0, 0);
 
-	SDL_Delay(1000);
+		SDL_RenderPresent(context);
+		SDL_Delay(10);
+	}
 
 	SDL_DestroyRenderer(context);
 	SDL_DestroyWindow(window);