uniform-location.html

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"use strict";

description("Tests the WebGLUniformLocation API");

var wtu = WebGLTestUtils;

var contextA = wtu.create3DContext();

var contextB = wtu.create3DContext();

var programA1 = wtu.loadStandardProgram(contextA);

var programA2 = wtu.loadStandardProgram(contextA);

var programB = wtu.loadStandardProgram(contextB);

var programS = wtu.loadProgramFromFile(contextA, "../../resources/structUniformShader.vert", "../../resources/fragmentShader.frag");

var programV = wtu.loadProgramFromFile(contextA, "../../resources/floatUniformShader.vert", "../../resources/noopUniformShader.frag");

var locationA = contextA.getUniformLocation(programA1, 'u_modelViewProjMatrix');

var locationB = contextB.getUniformLocation(programB, 'u_modelViewProjMatrix');

var locationSx = contextA.getUniformLocation(programS, "u_struct.x");

var locationSx2;

var locationArray0 = contextA.getUniformLocation(programS, "u_array[0]");

var locationArray1 = contextA.getUniformLocation(programS, "u_array[1]");

var locationVec4 = contextA.getUniformLocation(programV, "fval4");

var vec = [1, 2, 3, 4];

var mat = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(programA2)");

wtu.shouldGenerateGLError(contextA, contextA.INVALID_OPERATION, "contextA.uniformMatrix4fv(locationA, false, mat)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(programA1)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniformMatrix4fv(locationA, false, mat)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniformMatrix4fv(null, false, mat)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(programS)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniform1i(locationSx, 333)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniform1f(locationArray0, 4.0)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniform1f(locationArray1, 5.0)");

shouldBe("contextA.getUniform(programS, locationSx)", "333");

shouldBe("contextA.getUniform(programS, locationArray0)", "4.0");

shouldBe("contextA.getUniform(programS, locationArray1)", "5.0");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(programV)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniform4fv(locationVec4, vec)");

shouldBe("contextA.getUniform(programV, locationVec4)", "vec");

shouldBeNull("contextA.getUniformLocation(programV, \"IDontExist\")");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.linkProgram(programA1)");

// After linking all boxes are bad.

wtu.shouldGenerateGLError(contextA, contextA.INVALID_OPERATION, "contextA.uniformMatrix4fv(locationA, false, mat)");

// after re-linking the same program, all uniform locations become invalid.

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(programS)");

contextA.stencilMask(1);

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.linkProgram(programS)");

wtu.shouldGenerateGLError(contextA, contextA.INVALID_OPERATION, "contextA.uniform1i(locationSx, 3)");

wtu.shouldGenerateGLError(contextA, contextA.INVALID_OPERATION, "contextA.getUniform(programS, locationSx)");

// Make sure that with no current program, uniform location validation doesn't get confused.

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(null)");

wtu.shouldGenerateGLError(contextA, contextA.INVALID_OPERATION, "contextA.uniform1i(locationSx, 3)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.useProgram(programS)");

// Retrieve the locations again, and they should be good.

locationSx = contextA.getUniformLocation(programS, "u_struct.x");

locationArray0 = contextA.getUniformLocation(programS, "u_array[0]");

debug("here");

contextA.stencilMask(0);

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniform1i(locationSx, 3)");

wtu.shouldGenerateGLError(contextA, contextA.NO_ERROR, "contextA.uniform1f(locationArray0, 123)");

shouldBe("contextA.getUniform(programS, locationSx)", "3");

shouldBe("contextA.getUniform(programS, locationArray0)", "123");

// getUniformLocation should return a different object everytime, should not cache and return the same object

debug("Testing that getUniformLocation returns a different object everytime");

locationSx  = contextA.getUniformLocation(programS, "u_struct.x");

locationSx2 = contextA.getUniformLocation(programS, "u_struct.x");

shouldBeFalse("locationSx === locationSx2");

locationSx.foo  = {};

locationSx2.foo = {};

shouldBeFalse("locationSx.foo === locationSx2.foo");

var successfullyParsed = true;

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