[SDL2] pointer boolean (#8523)

Xcode-iOS/Demos/src/accelerometer.c

@@ -118,7 +118,7 @@ initializeTextures(SDL_Renderer *renderer)
 
     /* load the ship */
     bmp_surface = SDL_LoadBMP("ship.bmp");
-    if (bmp_surface == NULL) {
+    if (!bmp_surface) {
         fatalError("could not ship.bmp");
     }
     /* set blue to transparent on the ship */
@@ -127,7 +127,7 @@ initializeTextures(SDL_Renderer *renderer)
 
     /* create ship texture from surface */
     ship = SDL_CreateTextureFromSurface(renderer, bmp_surface);
-    if (ship == NULL) {
+    if (!ship) {
         fatalError("could not create ship texture");
     }
     SDL_SetTextureBlendMode(ship, SDL_BLENDMODE_BLEND);
@@ -140,12 +140,12 @@ initializeTextures(SDL_Renderer *renderer)
 
     /* load the space background */
     bmp_surface = SDL_LoadBMP("space.bmp");
-    if (bmp_surface == NULL) {
+    if (!bmp_surface) {
         fatalError("could not load space.bmp");
     }
     /* create space texture from surface */
     space = SDL_CreateTextureFromSurface(renderer, bmp_surface);
-    if (space == NULL) {
+    if (!space) {
         fatalError("could not create space texture");
     }
     SDL_FreeSurface(bmp_surface);
@@ -179,7 +179,7 @@ main(int argc, char *argv[])
     printf("There are %d joysticks available\n", SDL_NumJoysticks());
     printf("Default joystick (index 0) is %s\n", SDL_JoystickName(0));
     accelerometer = SDL_JoystickOpen(0);
-    if (accelerometer == NULL) {
+    if (!accelerometer) {
         fatalError("Could not open joystick (accelerometer)");
     }
     printf("joystick number of axis = %d\n",

Xcode-iOS/Demos/src/fireworks.c

@@ -334,7 +334,7 @@ initializeTexture()
                                            to format passed into OpenGL */
 
     bmp_surface = SDL_LoadBMP("stroke.bmp");
-    if (bmp_surface == NULL) {
+    if (!bmp_surface) {
         fatalError("could not load stroke.bmp");
     }
 

Xcode-iOS/Demos/src/happy.c

@@ -108,7 +108,7 @@ initializeTexture(SDL_Renderer *renderer)
     SDL_Surface *bmp_surface;
     /* load the bmp */
     bmp_surface = SDL_LoadBMP("icon.bmp");
-    if (bmp_surface == NULL) {
+    if (!bmp_surface) {
         fatalError("could not load bmp");
     }
     /* set white to transparent on the happyface */
@@ -117,7 +117,7 @@ initializeTexture(SDL_Renderer *renderer)
 
     /* convert RGBA surface to texture */
     texture = SDL_CreateTextureFromSurface(renderer, bmp_surface);
-    if (texture == NULL) {
+    if (!texture) {
         fatalError("could not create texture");
     }
     SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);

Xcode-iOS/Demos/src/keyboard.c

@@ -165,7 +165,7 @@ loadFont(void)
 {
     SDL_Surface *surface = SDL_LoadBMP("kromasky_16x16.bmp");
 
-    if (surface == NULL) {
+    if (!surface) {
         printf("Error loading bitmap: %s\n", SDL_GetError());
         return 0;
     } else {
@@ -183,7 +183,7 @@ loadFont(void)
         SDL_BlitSurface(surface, NULL, converted, NULL);
         /* create our texture */
         texture = SDL_CreateTextureFromSurface(renderer, converted);
-        if (texture == NULL) {
+        if (!texture) {
             printf("texture creation failed: %s\n", SDL_GetError());
         } else {
             /* set blend mode for our texture */

Xcode-iOS/Demos/src/rectangles.c

@@ -58,11 +58,11 @@ main(int argc, char *argv[])
 
     /* create window and renderer */
     window = SDL_CreateWindow(NULL, 0, 0, 320, 480, SDL_WINDOW_ALLOW_HIGHDPI);
-    if (window == NULL) {
+    if (!window) {
         fatalError("Could not initialize Window");
     }
     renderer = SDL_CreateRenderer(window, -1, 0);
-    if (renderer == NULL) {
+    if (!renderer) {
         fatalError("Could not create renderer");
     }
 

Xcode-iOS/Demos/src/touch.c

@@ -57,13 +57,13 @@ initializeTexture(SDL_Renderer *renderer)
 {
     SDL_Surface *bmp_surface;
     bmp_surface = SDL_LoadBMP("stroke.bmp");
-    if (bmp_surface == NULL) {
+    if (!bmp_surface) {
         fatalError("could not load stroke.bmp");
     }
     brush =
         SDL_CreateTextureFromSurface(renderer, bmp_surface);
     SDL_FreeSurface(bmp_surface);
-    if (brush == NULL) {
+    if (!brush) {
         fatalError("could not create brush texture");
     }
     /* additive blending -- laying strokes on top of eachother makes them brighter */