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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
/**
* Tests that the rendering is updated when a uniform variable is
* changed in one shader of a page with multiple WebGL contexts.
*/
function* ifWebGLSupported() {
let { target, front } = yield initBackend(MULTIPLE_CONTEXTS_URL);
front.setup({ reload: true });
let [firstProgramActor, secondProgramActor] = yield getPrograms(front, 2);
let firstFragmentShader = yield firstProgramActor.getFragmentShader();
let secondFragmentShader = yield secondProgramActor.getFragmentShader();
let oldFragSource = yield firstFragmentShader.getText();
let newFragSource = oldFragSource.replace("vec4(uColor", "vec4(0.25, 0.25, 0.25");
let status = yield firstFragmentShader.compile(newFragSource);
ok(!status,
"The first new fragment shader source was compiled without errors.");
yield front.waitForFrame();
yield ensurePixelIs(front, { x: 0, y: 0 }, { r: 64, g: 64, b: 64, a: 255 }, true, "#canvas1");
yield ensurePixelIs(front, { x: 127, y: 127 }, { r: 64, g: 64, b: 64, a: 255 }, true, "#canvas1");
yield ensurePixelIs(front, { x: 0, y: 0 }, { r: 0, g: 255, b: 255, a: 255 }, true, "#canvas2");
yield ensurePixelIs(front, { x: 127, y: 127 }, { r: 0, g: 255, b: 255, a: 255 }, true, "#canvas2");
ok(true, "The first fragment shader was changed.");
oldFragSource = yield secondFragmentShader.getText();
newFragSource = oldFragSource.replace("vec4(uColor", "vec4(0.75, 0.75, 0.75");
status = yield secondFragmentShader.compile(newFragSource);
ok(!status,
"The second new fragment shader source was compiled without errors.");
yield front.waitForFrame();
yield ensurePixelIs(front, { x: 0, y: 0 }, { r: 64, g: 64, b: 64, a: 255 }, true, "#canvas1");
yield ensurePixelIs(front, { x: 127, y: 127 }, { r: 64, g: 64, b: 64, a: 255 }, true, "#canvas1");
yield ensurePixelIs(front, { x: 0, y: 0 }, { r: 191, g: 191, b: 191, a: 255 }, true, "#canvas2");
yield ensurePixelIs(front, { x: 127, y: 127 }, { r: 191, g: 191, b: 191, a: 255 }, true, "#canvas2");
ok(true, "The second fragment shader was changed.");
yield removeTab(target.tab);
finish();
}
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