Render player with animated sprite

app/main.c

@@ -10,9 +10,11 @@
 #include <libxml/parser.h>
 #include <string.h>
 
+#define SCALE 4
+
 #define TILESIZE 32
-#define VIEWWIDTH 30
-#define VIEWHEIGHT 20
+#define VIEWWIDTH 8
+#define VIEWHEIGHT 6
 
 #define MAX_PATH_LEN 128
 
@@ -25,10 +27,17 @@
 #define TSASSET "/tileset.png"
 #define TSCOLS 56
 
+#define PIASSET "/player/idle/down.png"
+#define PIWIDTH 48
+#define PIHEIGHT 64
+#define PIANIMLEN 8
+
+#define BASEANIMPERIOD 200
+
 static SDL_Window *window;
 static SDL_Renderer *renderer;
 static unsigned map[MAPWIDTH][MAPHEIGHT];
-static SDL_Texture *tstex;
+static SDL_Texture *tstex, *pitex;
 
 int main(int argc, char *argv[])
 {
@@ -44,7 +53,7 @@ int main(int argc, char *argv[])
 	assert(0 == err);
 	window = SDL_CreateWindow(
 	    "2D Game", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
-	    TILESIZE * VIEWWIDTH, TILESIZE * VIEWHEIGHT, 0);
+	    SCALE * TILESIZE * VIEWWIDTH, SCALE * TILESIZE * VIEWHEIGHT, 0);
 	assert(NULL != window);
 	renderer = SDL_CreateRenderer(window, -1, 0);
 	assert(NULL != renderer);
@@ -127,9 +136,36 @@ int main(int argc, char *argv[])
 	tstex = IMG_LoadTexture(renderer, path);
 	assert(NULL != tstex);
 
-	// Render map -- no motion yet so just needs to be done once
-	int offx = 0, offy = 0;
+	// Load player idle spritesheet
+	assert(strlen(argv[1]) + strlen(PIASSET) < MAX_PATH_LEN);
+	strcpy(path, argv[1]);
+	strcat(path, PIASSET);
+	pitex = IMG_LoadTexture(renderer, path);
+	assert(NULL != pitex);
+
+	int offx = 16, offy = 0;
+	const SDL_Rect pdest = {
+		.x = SCALE * 80,
+		.y = SCALE * 80,
+		.w = SCALE * PIWIDTH,
+		.h = SCALE * PIHEIGHT,
+	};
+
+	SDL_Event event;
+	while (1) {
+		// Handle events
+		SDL_PollEvent(&event);
+		switch (event.type) {
+		case SDL_QUIT:
+			goto quit;
+
+		default:
+			break;
+		}
+
 		SDL_RenderClear(renderer);
+
+		// Draw map
 		for (int y = 0; y < VIEWHEIGHT; ++y) {
 			for (int x = 0; x < VIEWWIDTH; ++x) {
 				const unsigned tileid
@@ -143,26 +179,27 @@ int main(int argc, char *argv[])
 					.h = TILESIZE,
 				};
 				const SDL_Rect dest = {
-				.x = TILESIZE * x,
-				.y = TILESIZE * y,
-				.w = TILESIZE,
-				.h = TILESIZE,
+					.x = SCALE * TILESIZE * x,
+					.y = SCALE * TILESIZE * y,
+					.w = SCALE * TILESIZE,
+					.h = SCALE * TILESIZE,
 				};
 				SDL_RenderCopy(renderer, tstex, &src, &dest);
 			}
 		}
+
+		// Draw player
+		const unsigned piframe
+		    = (SDL_GetTicks64() / BASEANIMPERIOD) % PIANIMLEN;
+		const SDL_Rect psrc = {
+			.x = PIWIDTH * piframe,
+			.y = 0,
+			.w = PIWIDTH,
+			.h = PIHEIGHT,
+		};
+		SDL_RenderCopy(renderer, pitex, &psrc, &pdest);
+
 		SDL_RenderPresent(renderer);
-
-	SDL_Event event;
-	while (1) {
-		SDL_PollEvent(&event);
-		switch (event.type) {
-		case SDL_QUIT:
-			goto quit;
-
-		default:
-			break;
-		}
 	}
 
 quit: