Set Application With and Height in Size() Based on the Background Image Width and Height

Persis

Say have a background image named img. I get exceptions when I do : size(int(img.width), int(img.height));

Is there a way I can automatically set the size of the application window based on the background image W and H?

FYI, background is a PShape stored in an SVG file.

TfGuy44

Works fine for me...

PImage img = loadImage("http://www.gravatar.com/avatar/8436b2ef98da12c6fd78d4fe0ea56eee?size=250&default=http://vanillicon.com/8436b2ef98da12c6fd78d4fe0ea56eee_200.png");
void setup(){
  size(img.width, img.height);
}
void draw(){
  image(img,0,0);
}

Persis

Thanks TfGuy44 but that doesn't work. I think for the background I should not be using PShape and must use PImage instead!

TfGuy44

Works fine for me... Uses the bot1.svg that comes with Examples > Basics > Shape > LoadDisplaySVG

PShape bot;

void setup() {
  bot = loadShape("bot1.svg");
  size(int(bot.width), int(bot.height));
} 

void draw(){
  background(102);
  shape(bot, 0, 0);
}

Persis

OK it works now. Thanks for the tip!

GoToLoop

Just an extra caution: Processing re-runs the code above size(). @-)
In order to avoid re-loading files unnecessarily, check whether it's still null: *-:)

// forum.processing.org/two/discussion/9205/
// set-application-with-and-height-in-size-
// based-on-the-background-image-width-and-height

static final String SVG = "https://" + "upload.wikimedia.org/"
+ "wikipedia/commons/8/84/Example.svg";

static final String RENDERER = JAVA2D;
//static final String RENDERER = P2D;

PShape bg;

void setup() {
  if (bg == null)  bg = loadShape(SVG);
  size((int) bg.width, (int) bg.height, RENDERER);
  noLoop();
}

void draw() {
  background(0300);
  shape(bg);
}

GoToLoop

Alternatively we can check either width or height are still set to their initial default values: O:-)
if (width == DEFAULT_WIDTH) bg = loadShape(SVG);