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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL WEBGL_shader_pixel_local_storage Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/desktop-gl-constants.js"></script>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
<script src="../../js/tests/compositing-test.js"></script>
<script src="../../js/tests/invalid-vertex-attrib-test.js"></script>
</head>
<body>
<div id="description"></div>
<canvas id="canvas" width="128" height="128" style="background-color:#080"> </canvas>
<canvas id="canvas_no_alpha" width="128" height="128"> </canvas>
<div id="console"></div>
<script>
"use strict";
description("This test verifies the functionality of the WEBGL_shader_pixel_local_storage " +
"extension, if it is available.");
const wtu = WebGLTestUtils;
const canvas = document.getElementById("canvas");
const gl = wtu.create3DContext(canvas, {alpha: true}, 2);
const gl_no_alpha = wtu.create3DContext("canvas_no_alpha", {alpha: false}, 2);
let pls = null;
// Outputs a fullscreen quad from a 4-vertex triangle strip.
const fullscreenQuadVertexShader = `#version 300 es
void main() {
gl_Position.x = (gl_VertexID & 1) == 0 ? -1. : 1.;
gl_Position.y = (gl_VertexID & 2) == 0 ? -1. : 1.;
gl_Position.zw = vec2(0, 1);
}`;
function arraysEqual(a, b) {
if (typeof a !== typeof b)
return false;
if (a.length != b.length)
return false;
for (let i = 0; i < a.length; ++i) {
if (a[i] !== b[i])
return false;
}
return true;
}
async function runTest() {
if (!gl) {
testFailed("WebGL2 context does not exist");
finishTest();
return;
}
debug("\nCheck the behavior surrounding WEBGL_shader_pixel_local_storage being enabled.");
checkExtensionNotSupportedWhenDisabled();
checkDependencyExtensionsEnabled(false);
debug("Enable WEBGL_shader_pixel_local_storage.");
pls = gl.getExtension("WEBGL_shader_pixel_local_storage");
wtu.runExtensionSupportedTest(gl, "WEBGL_shader_pixel_local_storage", pls != null);
if (!pls) {
finishTest();
return;
}
checkDependencyExtensionsEnabled(true);
checkImplementationDependentLimits();
checkInitialValues();
checkWebGLNonNormativeBehavior();
await checkRendering(gl);
await checkRendering(gl_no_alpha);
finishTest();
}
function checkExtensionNotSupportedWhenDisabled() {
debug("\nCheck that a context does not support WEBGL_shader_pixel_local_storage before it is " +
"enabled");
shouldBeNull("gl.getParameter(0x96E0 /*MAX_PIXEL_LOCAL_STORAGE_PLANES_WEBGL*/)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
shouldBeNull(
"gl.getParameter(0x96E1 /*MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE_WEBGL*/)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
shouldBeNull(
"gl.getParameter(0x96E2 /*MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES_WEBGL*/)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
shouldBeNull(
"gl.getParameter(0x96E3 /*PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL*/)");
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "parameter unknown without enabling the extension");
wtu.glErrorShouldBe(gl, gl.NONE);
}
function checkDependencyExtensionsEnabled(enabled) {
debug("\nCheck that dependency extensions of WEBGL_shader_pixel_local_storage are " +
(enabled ? "enabled" : "disabled"));
if (wtu.getSupportedExtensionWithKnownPrefixes(gl, "OES_draw_buffers_indexed") !== undefined) {
gl.getIndexedParameter(gl.BLEND_EQUATION_RGB, 1);
wtu.glErrorShouldBe(gl, enabled ? gl.NONE : gl.INVALID_ENUM,
"OES_draw_buffers_indexed not enabled or disabled as expected");
}
if (wtu.getSupportedExtensionWithKnownPrefixes(gl, "EXT_color_buffer_float") !== undefined) {
gl.bindRenderbuffer(gl.RENDERBUFFER, gl.createRenderbuffer());
gl.renderbufferStorage(gl.RENDERBUFFER, gl.R32F, 1, 1);
wtu.glErrorShouldBe(gl, enabled ? gl.NONE : gl.INVALID_ENUM,
"EXT_color_buffer_float not enabled or disabled as expected");
gl.bindRenderbuffer(gl.RENDERBUFFER, null);
}
if (wtu.getSupportedExtensionWithKnownPrefixes(gl, "EXT_color_buffer_half_float") !== undefined) {
gl.bindRenderbuffer(gl.RENDERBUFFER, gl.createRenderbuffer());
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RG16F, 1, 1);
wtu.glErrorShouldBe(gl, enabled ? gl.NONE : gl.INVALID_ENUM,
"EXT_color_buffer_half_float not enabled or disabled as expected");
gl.bindRenderbuffer(gl.RENDERBUFFER, null);
}
}
function checkImplementationDependentLimits() {
debug("\nVerify conformant implementation-dependent PLS limits.");
window.MAX_PIXEL_LOCAL_STORAGE_PLANES =
gl.getParameter(pls.MAX_PIXEL_LOCAL_STORAGE_PLANES_WEBGL);
window.MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE =
gl.getParameter(pls.MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE_WEBGL);
window.MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES =
gl.getParameter(pls.MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES_WEBGL);
wtu.glErrorShouldBe(gl, gl.NONE, "Pixel local storage queries should be supported.");
window.MAX_COLOR_ATTACHMENTS = gl.getParameter(gl.MAX_COLOR_ATTACHMENTS);
window.MAX_DRAW_BUFFERS = gl.getParameter(gl.MAX_DRAW_BUFFERS);
// Table 6.X: Impementation Dependent Pixel Local Storage Limits.
shouldBeTrue("MAX_PIXEL_LOCAL_STORAGE_PLANES >= 4");
shouldBeTrue("MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE >= 0");
shouldBeTrue("MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES >= 4");
// Logical deductions based on 6.X.
shouldBeTrue(`MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES >=
MAX_PIXEL_LOCAL_STORAGE_PLANES`);
shouldBeTrue(`MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES >=
MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE`);
shouldBeTrue(`MAX_COLOR_ATTACHMENTS + MAX_PIXEL_LOCAL_STORAGE_PLANES >=
MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES`);
shouldBeTrue(`MAX_DRAW_BUFFERS + MAX_PIXEL_LOCAL_STORAGE_PLANES >=
MAX_COMBINED_DRAW_BUFFERS_AND_PIXEL_LOCAL_STORAGE_PLANES`);
}
function checkInitialValues() {
debug("\nCheck that PLS state has the correct initial values.");
shouldBeTrue("gl.getParameter(pls.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 0");
wtu.glErrorShouldBe(
gl, gl.NONE,
"It's valid to query GL_PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL even when fbo 0 is bound.");
// Table 6.Y: Pixel Local Storage State
gl.bindFramebuffer(gl.FRAMEBUFFER, gl.createFramebuffer());
shouldBeTrue("gl.getParameter(pls.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 0");
debug("Check the initial clear values for each plane.");
const MAX_PIXEL_LOCAL_STORAGE_PLANES =
gl.getParameter(pls.MAX_PIXEL_LOCAL_STORAGE_PLANES_WEBGL);
for (let i = 0; i < MAX_PIXEL_LOCAL_STORAGE_PLANES; ++i)
{
expectTrue(pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_FORMAT_WEBGL) == gl.NONE);
expectTrue(pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_TEXTURE_NAME_WEBGL) == null);
expectTrue(pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_TEXTURE_LEVEL_WEBGL) == 0);
expectTrue(pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_TEXTURE_LAYER_WEBGL) == 0);
expectTrue(arraysEqual(
pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_CLEAR_VALUE_FLOAT_WEBGL),
new Float32Array([0, 0, 0, 0])));
expectTrue(arraysEqual(
pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_CLEAR_VALUE_INT_WEBGL),
new Int32Array([0, 0, 0, 0])));
expectTrue(arraysEqual(
pls.getFramebufferPixelLocalStorageParameterWEBGL(
i, pls.PIXEL_LOCAL_CLEAR_VALUE_UNSIGNED_INT_WEBGL),
new Uint32Array([0, 0, 0, 0])));
}
wtu.glErrorShouldBe(gl, gl.NONE);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
}
function checkWebGLNonNormativeBehavior() {
debug("\nCheck the WebGL-specific behavior not found in the " +
"ANGLE_shader_pixel_local_storage specification.");
gl.bindFramebuffer(gl.FRAMEBUFFER, gl.createFramebuffer());
debug("If 'texture' has been deleted, generates an INVALID_OPERATION error.");
wtu.glErrorShouldBe(gl, gl.NONE);
const tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texStorage2D(gl.TEXTURE_2D, 1, gl.RGBA8, 1, 1);
wtu.glErrorShouldBe(gl, gl.NONE);
gl.deleteTexture(tex);
pls.framebufferTexturePixelLocalStorageWEBGL(0, tex, 0, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION);
debug("\nIf 'texture' was generated by a different WebGL2RenderingContext than this one, " +
"generates an INVALID_OPERATION error.");
const gl2 = wtu.create3DContext(null, null, 2);
const tex2 = gl2.createTexture();
gl2.bindTexture(gl2.TEXTURE_2D, tex2);
gl2.texStorage2D(gl2.TEXTURE_2D, 1, gl2.RGBA8, 1, 1);
pls.framebufferTexturePixelLocalStorageWEBGL(0, tex2, 0, 0);
wtu.glErrorShouldBe(gl2, gl2.NONE);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION);
debug("\nIf value has less than srcOffset + 4 elements, generates an INVALID_VALUE error.");
wtu.glErrorShouldBe(gl, gl.NONE);
pls.framebufferPixelLocalClearValuefvWEBGL(0, new Float32Array(3));
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValuefvWEBGL(1, [0, 0, 0]);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueivWEBGL(2, new Int32Array(3));
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueivWEBGL(3, [0, 0, 0]);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueuivWEBGL(4, new Uint32Array(3));
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueuivWEBGL(3, [0, 0, 0]);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValuefvWEBGL(2, new Float32Array(5), 2);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValuefvWEBGL(1, [0, 0, 0, 0, 0], 2);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueivWEBGL(0, new Int32Array(5), 2);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueivWEBGL(1, [0, 0, 0, 0, 0], 2);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueuivWEBGL(2, new Uint32Array(5), 2);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
pls.framebufferPixelLocalClearValueuivWEBGL(3, [0, 0, 0, 0, 0], 2);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
debug("\nCheck that srcOffset works properly.");
const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
pls.framebufferPixelLocalClearValuefvWEBGL(0, new Float32Array(arr), 1);
wtu.glErrorShouldBe(gl, gl.NONE);
shouldBeTrue(`arraysEqual(pls.getFramebufferPixelLocalStorageParameterWEBGL(
0, pls.PIXEL_LOCAL_CLEAR_VALUE_FLOAT_WEBGL),
new Float32Array([1, 2, 3, 4]))`);
pls.framebufferPixelLocalClearValuefvWEBGL(1, arr, 2);
wtu.glErrorShouldBe(gl, gl.NONE);
shouldBeTrue(`arraysEqual(pls.getFramebufferPixelLocalStorageParameterWEBGL(
1, pls.PIXEL_LOCAL_CLEAR_VALUE_FLOAT_WEBGL),
[2, 3, 4, 5])`);
pls.framebufferPixelLocalClearValueivWEBGL(2, new Int32Array(arr), 3);
wtu.glErrorShouldBe(gl, gl.NONE);
shouldBeTrue(`arraysEqual(pls.getFramebufferPixelLocalStorageParameterWEBGL(
2, pls.PIXEL_LOCAL_CLEAR_VALUE_INT_WEBGL),
new Float32Array([3, 4, 5, 6]))`);
pls.framebufferPixelLocalClearValueivWEBGL(3, arr, 4);
wtu.glErrorShouldBe(gl, gl.NONE);
shouldBeTrue(`arraysEqual(pls.getFramebufferPixelLocalStorageParameterWEBGL(
3, pls.PIXEL_LOCAL_CLEAR_VALUE_INT_WEBGL),
[4, 5, 6, 7])`);
pls.framebufferPixelLocalClearValueuivWEBGL(2, new Uint32Array(arr), 5);
wtu.glErrorShouldBe(gl, gl.NONE);
shouldBeTrue(`arraysEqual(pls.getFramebufferPixelLocalStorageParameterWEBGL(
2, pls.PIXEL_LOCAL_CLEAR_VALUE_UNSIGNED_INT_WEBGL),
new Uint32Array([5, 6, 7, 8]))`);
pls.framebufferPixelLocalClearValueuivWEBGL(1, arr, 6);
wtu.glErrorShouldBe(gl, gl.NONE);
shouldBeTrue(`arraysEqual(pls.getFramebufferPixelLocalStorageParameterWEBGL(
1, pls.PIXEL_LOCAL_CLEAR_VALUE_UNSIGNED_INT_WEBGL),
[6, 7, 8, 9])`);
wtu.glErrorShouldBe(gl, gl.NONE);
debug("\nCheck that PIXEL_LOCAL_TEXTURE_NAME_WEBGL returns a WebGLTexture.");
shouldBeTrue(`pls.getFramebufferPixelLocalStorageParameterWEBGL(
0, pls.PIXEL_LOCAL_TEXTURE_NAME_WEBGL) === null`);
window.validTex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, validTex);
gl.texStorage2D(gl.TEXTURE_2D, 1, gl.RGBA8, 1, 1);
wtu.glErrorShouldBe(gl, gl.NONE);
pls.framebufferTexturePixelLocalStorageWEBGL(0, validTex, 0, 0);
shouldBeTrue(`pls.getFramebufferPixelLocalStorageParameterWEBGL(
0, pls.PIXEL_LOCAL_TEXTURE_NAME_WEBGL) === validTex`);
pls.framebufferTexturePixelLocalStorageWEBGL(0, null, 0, 0);
shouldBeTrue(`pls.getFramebufferPixelLocalStorageParameterWEBGL(
0, pls.PIXEL_LOCAL_TEXTURE_NAME_WEBGL) === null`);
wtu.glErrorShouldBe(gl, gl.NONE);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
}
async function checkRendering(localGL) {
const localCanvas = localGL.canvas;
const alpha = localGL.getContextAttributes().alpha;
debug("\nCheck very simple rendering with {alpha: " + alpha + "}");
const localPLS = localGL.getExtension("WEBGL_shader_pixel_local_storage");
if (!localPLS) {
testFailed("localGL doesn't support pixel local storage.");
return;
}
const tex = localGL.createTexture();
localGL.bindTexture(localGL.TEXTURE_2D, tex);
localGL.texStorage2D(localGL.TEXTURE_2D, 1, localGL.RGBA8, localCanvas.width, localCanvas.height);
wtu.glErrorShouldBe(localGL, localGL.NONE);
const plsFBO = localGL.createFramebuffer();
localGL.bindFramebuffer(localGL.FRAMEBUFFER, plsFBO);
localPLS.framebufferTexturePixelLocalStorageWEBGL(0, tex, 0, 0);
wtu.glErrorShouldBe(localGL, localGL.NONE);
localGL.viewport(0, 0, localCanvas.width, localCanvas.height);
// Adds a uniform color into the existing color in pixel local storage.
const fs = `#version 300 es
#extension GL_ANGLE_shader_pixel_local_storage : require
precision lowp float;
uniform vec4 color;
layout(binding=0, rgba8) uniform lowp pixelLocalANGLE pls;
void main() {
vec4 newColor = color + pixelLocalLoadANGLE(pls);
pixelLocalStoreANGLE(pls, newColor);
}`;
const program = wtu.setupProgram(localGL, [fullscreenQuadVertexShader, fs]);
if (!program) {
testFailed("Failed to compile program.");
return;
}
localGL.useProgram(program);
const colorUniLocation = localGL.getUniformLocation(program, "color");
wtu.glErrorShouldBe(localGL, localGL.NONE);
// Disable color mask to ensure PLS and canvas manage their own color masks properly.
localGL.colorMask(false, true, false, true);
// Set global variables for shouldBeTrue().
window.localGL = localGL;
window.localPLS = localPLS;
debug("\nCheck that pixel local storage works properly");
localGL.disable(localGL.DITHER);
localPLS.beginPixelLocalStorageWEBGL([localPLS.LOAD_OP_ZERO_WEBGL]);
wtu.glErrorShouldBe(localGL, localGL.NONE);
shouldBeTrue("localGL.getParameter(localPLS.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 1");
localGL.uniform4f(colorUniLocation, 0, 1, 0, 0);
localGL.drawArrays(localGL.TRIANGLE_STRIP, 0, 4);
localPLS.pixelLocalStorageBarrierWEBGL();
localGL.uniform4f(colorUniLocation, 1, 0, 0, 0);
localGL.drawArrays(localGL.TRIANGLE_STRIP, 0, 4);
localPLS.endPixelLocalStorageWEBGL([localPLS.STORE_OP_STORE_WEBGL]);
wtu.glErrorShouldBe(localGL, localGL.NONE);
shouldBeTrue("localGL.getParameter(localPLS.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 0");
const readFBO = localGL.createFramebuffer();
localGL.bindFramebuffer(localGL.READ_FRAMEBUFFER, readFBO);
localGL.framebufferTexture2D(localGL.READ_FRAMEBUFFER, localGL.COLOR_ATTACHMENT0,
localGL.TEXTURE_2D, tex, 0);
wtu.glErrorShouldBe(localGL, localGL.NONE);
wtu.checkCanvas(localGL, [255, 255, 0, 0]);
debug("\nCheck that alpha is properly handled in the main canvas.");
localGL.bindFramebuffer(localGL.DRAW_FRAMEBUFFER, null);
localGL.blitFramebuffer(0, 0, localCanvas.width, localCanvas.height, 0, 0, localCanvas.width,
localCanvas.height, localGL.COLOR_BUFFER_BIT, localGL.NEAREST);
localGL.bindFramebuffer(localGL.FRAMEBUFFER, null);
wtu.glErrorShouldBe(localGL, localGL.NONE);
wtu.checkCanvas(localGL, [255, 255, 0, alpha ? 0 : 255]);
localGL.bindFramebuffer(localGL.FRAMEBUFFER, plsFBO);
localPLS.beginPixelLocalStorageWEBGL([localPLS.LOAD_OP_LOAD_WEBGL]);
wtu.glErrorShouldBe(localGL, localGL.NONE);
shouldBeTrue("localGL.getParameter(localPLS.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 1");
debug("\nGoing down from composite.");
// The canvas should get cleared after compositing, even if PLS is active and color mask is
// disabled.
await new Promise(resolve => wtu.waitForComposite(resolve));
// Reset global variables for shouldBeTrue() after await.
window.localGL = localGL;
window.localPLS = localPLS;
debug("\nBack from composite!");
debug("\nPLS should still be active on plsFBO even after being interrupted for compositing.");
wtu.glErrorShouldBe(localGL, localGL.NONE);
shouldBeTrue("localGL.getParameter(localPLS.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 1");
localGL.uniform4f(colorUniLocation, 0, 0, 1, 0);
localGL.drawArrays(localGL.TRIANGLE_STRIP, 0, 4);
localPLS.endPixelLocalStorageWEBGL([localPLS.STORE_OP_STORE_WEBGL]);
wtu.glErrorShouldBe(localGL, localGL.NONE);
shouldBeTrue("localGL.getParameter(localPLS.PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_WEBGL) == 0");
debug("\nThe canvas should have gotten cleared while PLS was active.");
localGL.bindFramebuffer(localGL.FRAMEBUFFER, null);
wtu.checkCanvas(localGL, [0, 0, 0, alpha ? 0 : 255]);
debug("\nThe additional PLS draw to plsFBO should have still worked after being interrupted " +
"for compositing.");
localGL.bindFramebuffer(localGL.READ_FRAMEBUFFER, readFBO);
wtu.checkCanvas(localGL, [255, 255, 255, 0]);
wtu.glErrorShouldBe(localGL, localGL.NONE);
// Draws 'tex' to the canvas.
const fs2 = `#version 300 es
uniform lowp sampler2D tex;
out lowp vec4 fragColor;
void main() {
ivec2 pixelCoord = ivec2(floor(gl_FragCoord.xy));
fragColor = texelFetch(tex, pixelCoord, 0);
}`;
const program2 = wtu.setupProgram(localGL, [fullscreenQuadVertexShader, fs2]);
if (!program2) {
testFailed("Failed to compile program2.");
return;
}
debug("\nBlue should still be disabled in the color mask. Alpha is not disabled but should be " +
"implicitly disabled since the canvas doesn't have alpha.");
localGL.useProgram(program2);
localGL.uniform1i(localGL.getUniformLocation(program2, "tex"), 0);
localGL.bindFramebuffer(localGL.FRAMEBUFFER, null);
localGL.drawArrays(localGL.TRIANGLE_STRIP, 0, 4);
wtu.checkCanvas(localGL, [0, 255, 0, alpha ? 0 : 255]);
debug("\nThe client's color mask should have been preserved.");
shouldBeTrue(`arraysEqual(localGL.getParameter(localGL.COLOR_WRITEMASK),
[false, true, false, true])`);
}
runTest();
var successfullyParsed = true;
</script>
</body>
</html>
|
