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