michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:    http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: /**
michael@0:  * Tests that vertex and fragment shader sources can be changed.
michael@0:  */
michael@0: 
michael@0: function ifWebGLSupported() {
michael@0:   let [target, debuggee, front] = yield initBackend(SIMPLE_CANVAS_URL);
michael@0:   front.setup({ reload: true });
michael@0: 
michael@0:   let programActor = yield once(front, "program-linked");
michael@0:   let vertexShader = yield programActor.getVertexShader();
michael@0:   let fragmentShader = yield programActor.getFragmentShader();
michael@0: 
michael@0:   yield ensurePixelIs(debuggee, { x: 0, y: 0 }, { r: 255, g: 0, b: 0, a: 255 }, true);
michael@0:   yield ensurePixelIs(debuggee, { x: 128, y: 128 }, { r: 191, g: 64, b: 0, a: 255 }, true);
michael@0:   yield ensurePixelIs(debuggee, { x: 511, y: 511 }, { r: 0, g: 255, b: 0, a: 255 }, true);
michael@0: 
michael@0:   let vertSource = yield vertexShader.getText();
michael@0:   let fragSource = yield fragmentShader.getText();
michael@0:   ok(!vertSource.contains("2.0"),
michael@0:     "The vertex shader source is correct before changing it.");
michael@0:   ok(!fragSource.contains("0.5"),
michael@0:     "The fragment shader source is correct before changing it.");
michael@0: 
michael@0:   let newVertSource = vertSource.replace("1.0", "2.0");
michael@0:   let status = yield vertexShader.compile(newVertSource);
michael@0:   ok(!status,
michael@0:     "The new vertex shader source was compiled without errors.");
michael@0: 
michael@0:   yield ensurePixelIs(debuggee, { x: 0, y: 0 }, { r: 0, g: 0, b: 0, a: 255 }, true);
michael@0:   yield ensurePixelIs(debuggee, { x: 128, y: 128 }, { r: 255, g: 0, b: 0, a: 255 }, true);
michael@0:   yield ensurePixelIs(debuggee, { x: 511, y: 511 }, { r: 0, g: 0, b: 0, a: 255 }, true);
michael@0: 
michael@0:   let vertSource = yield vertexShader.getText();
michael@0:   let fragSource = yield fragmentShader.getText();
michael@0:   ok(vertSource.contains("2.0"),
michael@0:     "The vertex shader source is correct after changing it.");
michael@0:   ok(!fragSource.contains("0.5"),
michael@0:     "The fragment shader source is correct after changing the vertex shader.");
michael@0: 
michael@0:   let newFragSource = fragSource.replace("1.0", "0.5");
michael@0:   let status = yield fragmentShader.compile(newFragSource);
michael@0:   ok(!status,
michael@0:     "The new fragment shader source was compiled without errors.");
michael@0: 
michael@0:   yield ensurePixelIs(debuggee, { x: 0, y: 0 }, { r: 0, g: 0, b: 0, a: 255 }, true);
michael@0:   yield ensurePixelIs(debuggee, { x: 128, y: 128 }, { r: 255, g: 0, b: 0, a: 127 }, true);
michael@0:   yield ensurePixelIs(debuggee, { x: 511, y: 511 }, { r: 0, g: 0, b: 0, a: 255 }, true);
michael@0: 
michael@0:   let vertSource = yield vertexShader.getText();
michael@0:   let fragSource = yield fragmentShader.getText();
michael@0:   ok(vertSource.contains("2.0"),
michael@0:     "The vertex shader source is correct after changing the fragment shader.");
michael@0:   ok(fragSource.contains("0.5"),
michael@0:     "The fragment shader source is correct after changing it.");
michael@0: 
michael@0:   yield removeTab(target.tab);
michael@0:   finish();
michael@0: }