(function() {

function makeKernel(gpu) {

return gpu.createKernel(function(a){

return a[this.thread.y][this.thread.x];

})

.setOutput([matrixSize, matrixSize]);

}

function splitArray(array, part) {

var result = [];

for(var i = 0; i < array.length; i += part) {

result.push(array.slice(i, i + part));

}

return result;

}

var matrixSize = 4;

var A = Array.apply(null, Array(matrixSize*matrixSize)).map(function (_, i) {return i;});

A = splitArray(A, matrixSize);

QUnit.test( "Issue #195 Read from Texture 2D (GPU only) (auto)", function() {

const gpu = new GPU({ mode: null });

const noTexture = makeKernel(gpu);

const texture = makeKernel(gpu).setOutputToTexture(true);

const result = noTexture(A);

const textureResult = texture(A).toArray(gpu);

QUnit.assert.deepValueEqual(result, A);

QUnit.assert.deepValueEqual(textureResult, A);

QUnit.assert.deepValueEqual(textureResult, result);

gpu.destroy();

});

QUnit.test( "Issue #195 Read from Texture 2D (GPU only) (gpu)", function() {

const gpu = new GPU({ mode: 'gpu' });

const noTexture = makeKernel(gpu);

const texture = makeKernel(gpu).setOutputToTexture(true);

const result = noTexture(A);

const textureResult = texture(A).toArray(gpu);

QUnit.assert.deepValueEqual(result, A);

QUnit.assert.deepValueEqual(textureResult, A);

QUnit.assert.deepValueEqual(textureResult, result);

gpu.destroy();

});

QUnit.test( "Issue #195 Read from Texture 2D (GPU only) (webgl)", function() {

const gpu = new GPU({ mode: 'webgl' });

const noTexture = makeKernel(gpu);

const texture = makeKernel(gpu).setOutputToTexture(true);

const result = noTexture(A);

const textureResult = texture(A).toArray(gpu);

QUnit.assert.deepValueEqual(result, A);

QUnit.assert.deepValueEqual(textureResult, A);

QUnit.assert.deepValueEqual(textureResult, result);

gpu.destroy();

});

QUnit.test( "Issue #195 Read from Texture 2D (GPU Only) (webgl2)", function() {

const gpu = new GPU({ mode: 'webgl2' });

const noTexture = makeKernel(gpu);

const texture = makeKernel(gpu).setOutputToTexture(true);

const result = noTexture(A);

const textureResult = texture(A).toArray(gpu);

QUnit.assert.deepValueEqual(result, A);

QUnit.assert.deepValueEqual(textureResult, A);

QUnit.assert.deepValueEqual(textureResult, result);

gpu.destroy();

});

})();