Score is now displayed on the window

* Added Score structure
* Added Liberation Mono Bold font in src/assets/
* Racket structure has Score member
* General cleanup and improvements
* BUG: font_path string is dependent on where the binary is run

src/Makefile.am

@@ -7,6 +7,8 @@ pong_SOURCES = \
 	ball.c \
 	ball.h \
 	racket.c \
-	racket.h
+	racket.h \
+	score.c \
+	score.h
 pong_CFLAGS = $(SDL_CFLAGS) `pkg-config --cflags SDL2_ttf`
 pong_LDFLAGS = $(SDL_LIBS) `pkg-config --libs SDL2_ttf` -lm

src/pong.c

@@ -14,7 +14,18 @@ Pong_init() {
 
   p->ball = Ball_init(p->SCREEN_WIDTH, p->SCREEN_HEIGHT, p->BALL_POSX);
   p->racketL = Racket_init(p->SCREEN_WIDTH, p->SCREEN_HEIGHT, p->RACKET_POSX, p->SCREEN_HEIGHT/2, SDL_SCANCODE_E, SDL_SCANCODE_D);
+  if (p->racketL == NULL) {
+    Ball_free(p->ball);
+    free(p);
+    return NULL;
+  }
   p->racketR = Racket_init(p->SCREEN_WIDTH, p->SCREEN_HEIGHT, p->SCREEN_WIDTH - p->RACKET_POSX, p->SCREEN_HEIGHT/2, SDL_SCANCODE_I, SDL_SCANCODE_K);
+  if (p->racketR == NULL) {
+    Ball_free(p->ball);
+    Racket_free(p->racketL);
+    free(p);
+    return NULL;
+  }
   
   p->window = SDL_CreateWindow( "Pong", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, p->SCREEN_WIDTH, p->SCREEN_HEIGHT, SDL_WINDOW_SHOWN );
         if( p->window == NULL )
@@ -23,6 +34,7 @@ Pong_init() {
 	    Pong_free(p);
 	    return NULL;
         }
+
 	p->renderer = SDL_CreateRenderer(p->window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
         p->screenSurface = SDL_GetWindowSurface( p->window );			
 
@@ -36,6 +48,7 @@ Pong_init() {
 void
 Pong_free(Pong *p) {
   SDL_DestroyRenderer(p->renderer);
+  SDL_FreeSurface(p->screenSurface);
   SDL_DestroyWindow(p->window);
   Ball_free(p->ball);
   Racket_free(p->racketL);
@@ -49,14 +62,17 @@ Pong_clear(Pong *p) {
   SDL_RenderClear( p->renderer );
 }
 
-void
+int
 Pong_render(Pong *p) {
   Pong_clear(p);
-	    Ball_render(p->ball, p->renderer);
-	    Racket_render(p->racketL, p->renderer);
-	    Racket_render(p->racketR, p->renderer);
-	    
-	    SDL_RenderPresent(p->renderer);
+  const int error = Ball_render(p->ball, p->renderer)
+    + Racket_render(p->racketL, p->renderer)
+    + Racket_render(p->racketR, p->renderer);
+  if (error > 0) {
+    return error;
+  }
+  SDL_RenderPresent(p->renderer);
+  return 0;
 }
 
 
@@ -72,13 +88,13 @@ Ball_move(Ball *b, Pong *p)
   }
 	
   if (b->posX < 0) {
-    p->racketR->score++;
+    p->racketR->score->score++;
     Ball_reset(b, -1);
   }
 
       else if(b->posX + b->BALL_WIDTH > b->SCREEN_WIDTH)
   {
-    p->racketL->score++;
+    p->racketL->score->score++;
     Ball_reset(b, 1);
   }
 
@@ -108,7 +124,7 @@ Pong_run(Pong *p) {
 					Ball_move(p->ball, p);
 				Racket_move(p->racketL);
 				Racket_move(p->racketR);
-			        Pong_render(p);
+			        if (Pong_render(p) > 0) quit = true;
 				Pong_score_run(p);
   }
   Pong_score_end(p);
@@ -116,7 +132,7 @@ Pong_run(Pong *p) {
 
 void
 Pong_score(const Pong *p, char c) {
-  printf("SCORE: L %i | R %i", p->racketL->score, p->racketR->score);
+  printf("SCORE: L %i | R %i", p->racketL->score->score, p->racketR->score->score);
   putc(c, stdout);
 }
 

src/pong.h

@@ -11,7 +11,6 @@ typedef struct Pong {
   SDL_Window* window;
   SDL_Surface* screenSurface;
   SDL_Renderer* renderer;
-  //SDL_Texture* texture;
   SDL_Event e;
   Ball *ball;
   const int BALL_POSX;
@@ -23,7 +22,7 @@ typedef struct Pong {
 Pong* Pong_init();
 void Pong_free(Pong *p);
 void Pong_clear(Pong *p);
-void Pong_render(Pong *p);
+int Pong_render(Pong *p);
 void Ball_move(Ball *b, Pong *p);
 void Pong_run(Pong *p);
 void Pong_score(const Pong *p, char c);

src/racket.c

@@ -12,7 +12,11 @@ Racket_init(int screen_width, int screen_height, int posX, int posY, SDL_Keycode
   *(int *)&r->posX = posX;
   r->posY = posY;
   *(int *)&r->vel = 5;
-  r->score = 0;
+  r->score = Score_init(r->posX, 20);
+  if (r->score == NULL) {
+    free(r);
+    return NULL;
+  }
   *(SDL_Keycode *)&r->up = up;
   *(SDL_Keycode *)&r->down = down;
   r->updown = 0;
@@ -22,6 +26,7 @@ Racket_init(int screen_width, int screen_height, int posX, int posY, SDL_Keycode
 void
 Racket_free(Racket *r)
 {
+  Score_free(r->score);
   free(r);
 }
 
@@ -33,6 +38,9 @@ Racket_render(const Racket *r, SDL_Renderer *renderer) {
     return 1;
   }
   SDL_RenderFillRect(renderer, &rect);
+  if (Score_render(r->score, renderer) > 0) {
+    return 1;
+  }
   return 0;
 }
 

src/racket.h

@@ -3,6 +3,8 @@
 
 #include <SDL.h>
 
+#include "score.h"
+
 typedef struct Racket {
   const int RACKET_WIDTH;
   const int RACKET_HEIGHT;
@@ -12,7 +14,7 @@ typedef struct Racket {
   const int posX;
   int posY;
   const int vel;
-  int score;
+  Score* score;
   const SDL_Keycode up;
   const SDL_Keycode down;
   int updown;

src/score.c

@@ -0,0 +1,50 @@
+#include "score.h"
+
+static const char font_path[] = "assets/LiberationMono-Bold.ttf";
+
+Score*
+Score_init(int posX, int posY) {
+  Score *s = malloc(sizeof(Score));
+  *(int *)&s->POSX = posX;
+  *(int *)&s->POSY = posY;
+  s->score = 0;
+  s->font = TTF_OpenFont(font_path, 16);
+  if (s->font == NULL) {
+    printf("TTF_OpenFont fail with path '%s'. TTF_Error: %s\n", font_path, TTF_GetError());
+    free(s);
+    return NULL;
+  }
+  s->textColor = (SDL_Color) { 255, 255, 255 };
+  return s;
+}
+
+void
+Score_free(Score *s) {
+  TTF_CloseFont(s->font);
+  free(s);
+}
+
+int
+Score_render(const Score *s, SDL_Renderer *renderer) {
+  char score_str[3];
+  SDL_Rect scoreRect = { s->POSX , s->POSY, 50, 50 };
+
+  sprintf(score_str, "%i", s->score);
+  SDL_Surface *scoreSurface = TTF_RenderText_Solid(s->font, score_str, s->textColor);
+  if (scoreSurface == NULL) {
+    printf("Text rendering failed. TTF_Error: %s\n", TTF_GetError());
+    return 1;
+  }
+  SDL_Texture *scoreTexture = SDL_CreateTextureFromSurface(renderer, scoreSurface);
+  if (scoreTexture == NULL) {
+    printf("Texture rendering failed. SDL_Error: %s\n", SDL_GetError());
+    SDL_FreeSurface(scoreSurface);
+    return 1;
+  }
+  SDL_RenderCopy(renderer, scoreTexture, NULL, &scoreRect);
+  
+  SDL_FreeSurface(scoreSurface);
+  SDL_DestroyTexture(scoreTexture);
+
+  return 0;
+}

src/score.h

@@ -0,0 +1,19 @@
+#ifndef SCORE_H
+#define SCORE_H
+
+#include <SDL.h>
+#include <SDL_ttf.h>
+
+typedef struct Score {
+  const int POSX;
+  const int POSY;
+  int score;
+  TTF_Font *font;
+  SDL_Color textColor;
+} Score;
+
+Score* Score_init(int posX, int posY);
+void Score_free(Score* score);
+int Score_render(const Score* score, SDL_Renderer *renderer);
+
+#endif