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<title>WebGL WEBGL_compressed_texture_etc Conformance Tests</title>
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<script src="../../js/webgl-test-utils.js"></script>
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"use strict";
description("This test verifies the functionality of the WEBGL_compressed_texture_etc extension, if it is available.");

debug("");
var COMPRESSED_RGB_S3TC_DXT1_EXT              = 0x83F0;
var COMPRESSED_RGBA_S3TC_DXT1_EXT             = 0x83F1;
var COMPRESSED_RGBA_S3TC_DXT3_EXT             = 0x83F2;
var COMPRESSED_RGBA_S3TC_DXT5_EXT             = 0x83F3;
var COMPRESSED_RGB_PVRTC_4BPPV1_IMG           = 0x8C00;
var COMPRESSED_RGBA_PVRTC_4BPPV1_IMG          = 0x8C02;
var ETC1_RGB8_OES                             = 0x8D64;
var COMPRESSED_R11_EAC                        = 0x9270;
var COMPRESSED_SIGNED_R11_EAC                 = 0x9271;
var COMPRESSED_RG11_EAC                       = 0x9272;
var COMPRESSED_SIGNED_RG11_EAC                = 0x9273;
var COMPRESSED_RGB8_ETC2                      = 0x9274;
var COMPRESSED_SRGB8_ETC2                     = 0x9275;
var COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2  = 0x9276;
var COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2 = 0x9277;
var COMPRESSED_RGBA8_ETC2_EAC                 = 0x9278;
var COMPRESSED_SRGB8_ALPHA8_ETC2_EAC          = 0x9279;

var wtu = WebGLTestUtils;
var contextVersion = wtu.getDefault3DContextVersion();
var gl = wtu.create3DContext();
var WEBGL_compressed_texture_etc;

var formats = null;

function runTest() {
  if (!gl) {
    testFailed("context does not exist");
  } else {
    testPassed("context exists");

    var tex = gl.createTexture();
    gl.bindTexture(gl.TEXTURE_2D, tex);

    var haveExt = gl.getSupportedExtensions().indexOf("WEBGL_compressed_texture_etc") >= 0;
    WEBGL_compressed_texture_etc = gl.getExtension("WEBGL_compressed_texture_etc");

    var isPositive = true;

    if (haveExt) {
      if (WEBGL_compressed_texture_etc !== null) {
        testPassed("WEBGL_compressed_texture_etc listed as supported and getExtension succeeded");
      } else {
        testFailed("WEBGL_compressed_texture_etc listed as supported but getExtension failed");
        return;
      }
    } else {
      if (WEBGL_compressed_texture_etc !== null) {
        testFailed("WEBGL_compressed_texture_etc listed as unsupported but getExtension succeeded");
        return;
      } else {
        testPassed("No WEBGL_compressed_texture_etc support -- this is legal");
        isPositive = false;
      }
    }

    if (isPositive) {
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_R11_EAC", "0x9270");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_SIGNED_R11_EAC", "0x9271");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_RG11_EAC", "0x9272");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_SIGNED_RG11_EAC", "0x9273");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_RGB8_ETC2", "0x9274");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_SRGB8_ETC2", "0x9275");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2", "0x9276");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2", "0x9277");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_RGBA8_ETC2_EAC", "0x9278");
      shouldBe("WEBGL_compressed_texture_etc.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC", "0x9279");
    }

    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGBA_S3TC_DXT1_EXT, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGBA_S3TC_DXT5_EXT, 4, 4, 0, new Uint8Array(16))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, ETC1_RGB8_OES, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_PVRTC_4BPPV1_IMG, 8, 8, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGBA_PVRTC_4BPPV1_IMG, 8, 8, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexImage2D(gl.TEXTURE_3D, 0, COMPRESSED_R11_EAC, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.compressedTexSubImage2D(gl.TEXTURE_3D, 0, 0, 0, 4, 4, COMPRESSED_R11_EAC, new Uint8Array(8))");

    var expected = isPositive ? gl.NO_ERROR : gl.INVALID_ENUM;
    var expectedSub = isPositive ? gl.NO_ERROR : [gl.INVALID_ENUM, gl.INVALID_OPERATION];
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_R11_EAC, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expectedSub, "gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 4, 4, COMPRESSED_R11_EAC, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_SIGNED_R11_EAC, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RG11_EAC, 4, 4, 0, new Uint8Array(16))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_SIGNED_RG11_EAC, 4, 4, 0, new Uint8Array(16))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB8_ETC2, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_SRGB8_ETC2, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, 4, 4, 0, new Uint8Array(8))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGBA8_ETC2_EAC, 4, 4, 0, new Uint8Array(16))");
    wtu.shouldGenerateGLError(gl, expected, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, 4, 4, 0, new Uint8Array(16))");

    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "formats = gl.getParameter(gl.COMPRESSED_TEXTURE_FORMATS)");
    shouldBeNonNull("formats");
    shouldBe("formats.length", isPositive ? "10" : "0");

    debug("");
    if (contextVersion >= 2) {
      var expectedError = isPositive ? gl.INVALID_OPERATION: [gl.INVALID_ENUM, gl.INVALID_OPERATION];
      // `null` coerces into `0` for the PBO entrypoint, yielding INVALID_OP due to no PBO bound.
      wtu.shouldGenerateGLError(gl, expectedError, "gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_R11_EAC, 4, 4, 0, 0, null)");
      wtu.shouldGenerateGLError(gl, expectedError, "gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 0, 0, COMPRESSED_R11_EAC, 0, null)");
      wtu.shouldGenerateGLError(gl, expectedError, "gl.compressedTexImage3D(gl.TEXTURE_2D_ARRAY, 0, COMPRESSED_R11_EAC, 4, 4, 4, 0, 0, null)");
      wtu.shouldGenerateGLError(gl, expectedError, "gl.compressedTexSubImage3D(gl.TEXTURE_2D_ARRAY, 0, 0, 0, 0, 0, 0, 0, COMPRESSED_R11_EAC, 0, null)");
    } else {
      shouldThrow("gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_R11_EAC, 4, 4, 0, null)");
      shouldThrow("gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 0, 0, COMPRESSED_R11_EAC, null)");
      shouldThrow("gl.compressedTexImage3D(gl.TEXTURE_2D_ARRAY, 0, COMPRESSED_R11_EAC, 4, 4, 4, 0, null)");
      shouldThrow("gl.compressedTexSubImage3D(gl.TEXTURE_2D_ARRAY, 0, 0, 0, 0, 0, 0, 0, COMPRESSED_R11_EAC, null)");
    }
  }
}

runTest();

var successfullyParsed = true;
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