buffer-overflow-test.html

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<title>WebGL buffer overflow test for bindBufferRange</title>

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"use strict";

description("WebGL buffer overflow test: buffer overflow will not lead to failure in bindBufferRange");

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext(undefined, undefined, 2);

debug("");

var buffer1 = gl.createBuffer();

gl.bindBufferRange(gl.TRANSFORM_FEEDBACK_BUFFER, 0, buffer1, 0, 4);

wtu.glErrorShouldBe(gl, gl.NO_ERROR,

    "Calling bindBufferRange on a buffer where no storage is allocated should succeed.");

shouldBe("buffer1", "gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_BINDING, 0)");

shouldBe("4", "gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_SIZE, 0)");

shouldBe("0", "gl.getIndexedParameter(gl.TRANSFORM_FEEDBACK_BUFFER_START, 0)");

var buffer2 = gl.createBuffer();

gl.bindBuffer(gl.UNIFORM_BUFFER, buffer2);

gl.bufferData(gl.UNIFORM_BUFFER, 4, gl.STATIC_DRAW);

gl.bindBufferRange(gl.UNIFORM_BUFFER, 1, buffer2, 0, 8);

wtu.glErrorShouldBe(gl, gl.NO_ERROR,

    "Calling bindBufferRange on a buffer where the storage is not big enough should succeed.");

shouldBe("buffer2", "gl.getIndexedParameter(gl.UNIFORM_BUFFER_BINDING, 1)");

shouldBe("8", "gl.getIndexedParameter(gl.UNIFORM_BUFFER_SIZE, 1)");

shouldBe("0", "gl.getIndexedParameter(gl.UNIFORM_BUFFER_START, 1)");

debug("");

var successfullyParsed = true;

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