Run sketch on dedicated gpu

Processing Libraries
1

So my setup is a windows 10 with an integrated gpu (HD Graphics 4600) and a dedicated gpu (NVIDIA GeForce GT 750M). Now I’m trying to VJ with processing>spout>VJ software (Resolume). When I run the spout sender example from the library and run Resolume on the dedicated gpu, resolume says error “Cannot create DirectX/openGL interop” and crashes. When I run Resolume on the integrated gpu, the framerate drops to around 10. So I assume for spout, the spout receiver and sender need to run on the same gpu. The problem is that processing doesn’t run on the dedicated gpu.
Now the question is, (how) can I tell processing to run on the dedicated gpu?

//
//            SpoutSender
//
//      Send to a Spout receiver
//
//           spout.zeal.co
//
//       http://spout.zeal.co/download-spout/
//
//
//      Rotating cube by Dave Bollinger
//      http://processing.org/examples/texturecube.html
//

// IMPORT THE SPOUT LIBRARY
import spout.*;

PImage img; // image to use for the rotating cube demo
PGraphics pgr; // Graphics for demo

// DECLARE A SPOUT OBJECT
Spout spout;

void setup() {

  // Initial window size
  size(640, 360, P3D);
  textureMode(NORMAL);
  
  // Create a graphics object
  pgr = createGraphics(1280, 720, P3D);
  
  // Load an image
  img = loadImage("SpoutLogoMarble3.bmp");
  
  // The dimensions of graphics or image objects
  // do not have to be the same as the sketch window
    
  // CREATE A NEW SPOUT OBJECT
  spout = new Spout(this);
  
  // CREATE A NAMED SENDER
  // A sender can be created now with any name.
  // Otherwise a sender is created the first time
  // "sendTexture" is called and the sketch
  // folder name is used.  
  spout.createSender("Spout Processing");
  
} 

void draw()  { 

    background(0, 90, 100);
    noStroke();
    
    // Draw the graphics   
    pushMatrix();
    translate(width/2.0, height/2.0, -100);
    rotateX(frameCount * 0.01);
    rotateY(frameCount * 0.01);      
    scale(110);
    TexturedCube(img);
    popMatrix();
    
    // OPTION 1: SEND THE TEXTURE OF THE DRAWING SURFACE
    // Sends at the size of the window    
    spout.sendTexture();
    
    /*
    // OPTION 2: SEND THE TEXTURE OF GRAPHICS
    // Sends at the size of the graphics
    pgr.beginDraw();
    pgr.lights();
    pgr.background(0, 90, 100);
    pgr.fill(255);
    pushMatrix();
    pgr.translate(pgr.width/2, pgr.height/2);
    pgr.rotateX(frameCount/100.0);
    pgr.rotateY(frameCount/100.0);
    pgr.fill(192);
    pgr.box(pgr.width/4); // box is not textured
    popMatrix();
    pgr.endDraw();
    spout.sendTexture(pgr);
    image(pgr, 0, 0, width, height);
    */
    
    /*
    // OPTION 3: SEND THE TEXTURE OF AN IMAGE
    // Sends at the size of the image
    spout.sendTexture(img);
    image(img, 0, 0, width, height);
    */
    
}


void TexturedCube(PImage tex) {
  
  beginShape(QUADS);
  texture(tex);

  // +Z "front" face
  vertex(-1, -1,  1, 0, 0);
  vertex( 1, -1,  1, 1, 0);
  vertex( 1,  1,  1, 1, 1);
  vertex(-1,  1,  1, 0, 1);

  // -Z "back" face
  vertex( 1, -1, -1, 0, 0);
  vertex(-1, -1, -1, 1, 0);
  vertex(-1,  1, -1, 1, 1);
  vertex( 1,  1, -1, 0, 1);

  // +Y "bottom" face
  vertex(-1,  1,  1, 0, 0);
  vertex( 1,  1,  1, 1, 0);
  vertex( 1,  1, -1, 1, 1);
  vertex(-1,  1, -1, 0, 1);

  // -Y "top" face
  vertex(-1, -1, -1, 0, 0);
  vertex( 1, -1, -1, 1, 0);
  vertex( 1, -1,  1, 1, 1);
  vertex(-1, -1,  1, 0, 1);

  // +X "right" face
  vertex( 1, -1,  1, 0, 0);
  vertex( 1, -1, -1, 1, 0);
  vertex( 1,  1, -1, 1, 1);
  vertex( 1,  1,  1, 0, 1);

  // -X "left" face
  vertex(-1, -1, -1, 0, 0);
  vertex(-1, -1,  1, 1, 0);
  vertex(-1,  1,  1, 1, 1);
  vertex(-1,  1, -1, 0, 1);

  endShape();
}
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2

I used to have a machine with the same two GPUs which I dual booted with Ubuntu until the HDD died and I went all in with Ubuntu. So … my knowledge is rusty! :man_shrugging: But IIRC there was something on right-click on the launcher, or under properties, where you could select a GPU to run on?! And a way of setting it with the driver, although I may have ended up just setting it to run everything with java.exe / javaw.exe on the Nvidia GPU.

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3

silly me! I’ve tried setting the default gpu to the nvidia and that never worked. but running it on the nvidia once works like a charm. Thanks! So I guess I just have to select the gpu manually everytime I start processing…

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