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Add Blend Integer Min/Max Test (#3355)
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‎sdk/tests/conformance2/misc/00_test_list.txt‎

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--min-version 2.0.1 blend-integer.html
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expando-loss-2.html
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getextension-while-pbo-bound-stability.html
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instanceof-test.html

‎sdk/tests/conformance2/misc/blend-integer.html‎

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<!--
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Copyright (c) 2021 The Khronos Group Inc.
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Use of this source code is governed by an MIT-style license that can be
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found in the LICENSE.txt file.
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-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>WebGL 2 Blend Integer Conformance Tests</title>
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<link rel="stylesheet" href="../../resources/js-test-style.css" />
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<script src="../../js/js-test-pre.js"></script>
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<script src="../../js/webgl-test-utils.js"></script>
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</head>
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<body>
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<div id="description"></div>
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<div id="console"></div>
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<script id="outputVertexShader" type="x-shader/x-vertex">
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#version 300 es
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in vec4 vPosition;
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void main()
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{
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gl_Position = vPosition;
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}
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</script>
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<script id="outputFragmentShaderSigned" type="x-shader/x-fragment">
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#version 300 es
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layout(location = 1) out highp vec4 o_drawBuffer1;
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layout(location = 2) out highp ivec4 o_drawBuffer2;
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layout(location = 3) out highp vec4 o_drawBuffer3;
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void main(void)
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{
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o_drawBuffer1 = vec4(0, 0, 0, 0);
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o_drawBuffer2 = ivec4(0, 0, 0, 0);
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o_drawBuffer3 = vec4(0, 0, 0, 0);
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}
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</script>
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<script id="outputFragmentShaderUnsigned" type="x-shader/x-fragment">
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#version 300 es
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layout(location = 1) out highp vec4 o_drawBuffer1;
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layout(location = 2) out highp uvec4 o_drawBuffer2;
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layout(location = 3) out highp vec4 o_drawBuffer3;
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void main(void)
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{
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o_drawBuffer1 = vec4(0, 0, 0, 0);
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o_drawBuffer2 = uvec4(0, 0, 0, 0);
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o_drawBuffer3 = vec4(0, 0, 0, 0);
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}
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</script>
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<script>
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"use strict";
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description("This test verifies correct behavior of min/max blending operations on integer attachments.");
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debug("");
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const wtu = WebGLTestUtils;
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const gl = wtu.create3DContext(null, undefined, 2);
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if (!gl) {
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testFailed("WebGL context does not exist");
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} else {
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testPassed("WebGL context exists");
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debug("")
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debug("GL_MIN");
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runTest(false, gl.MIN);
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runTest(true, gl.MIN);
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debug("")
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debug("GL_MAX");
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runTest(false, gl.MAX);
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runTest(true, gl.MAX);
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}
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function compareValue(value, attachment, isSigned) {
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const pixel = isSigned ? new Int32Array(4) : new Uint32Array(4);
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gl.readBuffer(attachment);
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gl.readPixels(0, 0, 1, 1, gl.RGBA_INTEGER, isSigned ? gl.INT : gl.UNSIGNED_INT, pixel);
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let pass = true;
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for (let i = 0; i < 4; i++) {
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if (value[i] != pixel[i]) {
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testFailed(`Read value of channel ${i} should be ${pixel[i]}, was ${value[i]}.`);
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pass = false;
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}
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}
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return pass;
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}
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function runTest(isSigned, operation) {
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gl.viewport(0, 0, 1, 1);
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gl.disable(gl.BLEND);
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const program = wtu.setupProgram(gl,
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["outputVertexShader",
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isSigned ? "outputFragmentShaderSigned" : "outputFragmentShaderUnsigned"],
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['vPosition'], [0]);
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const quadParameters = wtu.setupUnitQuad(gl, 0, 1);
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// Setup render targets
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const fb = gl.createFramebuffer();
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gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
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const rb1 = gl.createRenderbuffer();
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gl.bindRenderbuffer(gl.RENDERBUFFER, rb1);
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gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, 50, 50);
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gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT1, gl.RENDERBUFFER, rb1);
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const rb2 = gl.createRenderbuffer();
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gl.bindRenderbuffer(gl.RENDERBUFFER, rb2);
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gl.renderbufferStorage(gl.RENDERBUFFER, isSigned ? gl.RGBA32I : gl.RGBA32UI, 50, 50);
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gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT2, gl.RENDERBUFFER, rb2);
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const rb3 = gl.createRenderbuffer();
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gl.bindRenderbuffer(gl.RENDERBUFFER, rb3);
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gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, 50, 50);
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gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT3, gl.RENDERBUFFER, rb3);
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gl.drawBuffers([gl.NONE, gl.COLOR_ATTACHMENT1, gl.COLOR_ATTACHMENT2, gl.COLOR_ATTACHMENT3]);
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wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Pipeline setup complete.");
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if (isSigned) {
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const clearValue = new Int32Array([-1, 2, -3, 4]);
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gl.clearBufferiv(gl.COLOR, 2, clearValue);
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if (compareValue(clearValue, gl.COLOR_ATTACHMENT2, isSigned)) {
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testPassed("Signed clear passed.");
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} else {
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testFailed("Signed clear failed.");
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}
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} else {
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const clearValue = new Uint32Array([1, 2, 3, 4]);
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gl.clearBufferuiv(gl.COLOR, 2, clearValue);
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if (compareValue(clearValue, gl.COLOR_ATTACHMENT2, isSigned)) {
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testPassed("Unsigned clear passed.");
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} else {
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testFailed("Unsigned clear failed.");
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}
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}
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gl.blendEquation(operation);
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gl.enable(gl.BLEND);
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wtu.drawUnitQuad(gl);
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wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Draw complete.");
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if (isSigned) {
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const drawValue = new Int32Array([0, 0, 0, 0]);
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if (compareValue(drawValue, gl.COLOR_ATTACHMENT2, isSigned)) {
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testPassed("Signed draw passed.");
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} else {
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testFailed("Signed draw failed.");
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}
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} else {
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const drawValue = new Uint32Array([0, 0, 0, 0]);
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if (compareValue(drawValue, gl.COLOR_ATTACHMENT2, isSigned)) {
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testPassed("Unsigned draw passed.");
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} else {
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testFailed("Unsigned draw failed.");
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}
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}
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gl.deleteRenderbuffer(rb1);
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gl.deleteRenderbuffer(rb2);
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gl.deleteRenderbuffer(rb3);
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gl.deleteFramebuffer(fb);
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gl.deleteProgram(program);
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}
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debug("");
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var successfullyParsed = true;
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</script>
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<script src="../../js/js-test-post.js"></script>
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</body>
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</html>

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