| <!-- |
| Copyright (c) 2019 The Khronos Group Inc. |
| Use of this source code is governed by an MIT-style license that can be |
| found in the LICENSE.txt file. |
| --> |
| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL the minimum number of uniforms are supported.</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"> </script> |
| </head> |
| <body> |
| <canvas id="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="vshader" type="x-shader/x-vertex"> |
| #define NUM_UNIFORMS 128 // See spec |
| attribute vec4 vPosition; |
| uniform vec4 uni[NUM_UNIFORMS]; |
| varying vec4 color; |
| void main() |
| { |
| gl_Position = vPosition; |
| vec4 c = vec4(0,0,0,0); |
| for (int ii = 0; ii < NUM_UNIFORMS; ++ii) { |
| c += uni[ii]; |
| } |
| color = c; |
| } |
| </script> |
| |
| <script id="fshader" type="x-shader/x-fragment"> |
| precision mediump float; |
| varying vec4 color; |
| void main() |
| { |
| gl_FragColor = color; |
| } |
| </script> |
| <script id="vshader2" type="x-shader/x-vertex"> |
| attribute vec4 vPosition; |
| void main() |
| { |
| gl_Position = vPosition; |
| } |
| </script> |
| |
| <script id="fshader2" type="x-shader/x-fragment"> |
| precision mediump float; |
| #define NUM_UNIFORMS 16 // See spec |
| uniform vec4 uni[NUM_UNIFORMS]; |
| void main() |
| { |
| vec4 c = vec4(0,0,0,0); |
| for (int ii = 0; ii < NUM_UNIFORMS; ++ii) { |
| c += uni[ii]; |
| } |
| gl_FragColor = vec4(c.r, c.g, c.b, c.a / 120.0); |
| } |
| </script> |
| <script> |
| "use strict"; |
| description(document.title); |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("example"); |
| var program = wtu.setupTexturedQuad(gl); |
| |
| //------------------------------------------------------------------------------ |
| var program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['vPosition'], [0]); |
| |
| for (var ii = 0; ii < 128; ++ii) { |
| var loc = gl.getUniformLocation(program, "uni[" + ii + "]"); |
| gl.uniform4f(loc, 2/256, 2/512, 2/1024, ii/8128); |
| } |
| |
| wtu.clearAndDrawUnitQuad(gl); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup."); |
| wtu.checkCanvasRect(gl, 0, 0, gl.canvas.width, gl.canvas.height, [255, 127, 64, 255], "Should render 255,127,64,32 (+/-1)", 1); |
| |
| //------------------------------------------------------------------------------ |
| var program = wtu.setupProgram(gl, ['vshader2', 'fshader2'], ['vPosition'], [0]); |
| |
| for (var ii = 0; ii < 16; ++ii) { |
| var loc = gl.getUniformLocation(program, "uni[" + ii + "]"); |
| gl.uniform4f(loc, 16/2048, 16/1024, 16/512, ii); |
| } |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup."); |
| wtu.clearAndDrawUnitQuad(gl); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup."); |
| wtu.checkCanvasRect(gl, 0, 0, gl.canvas.width, gl.canvas.height, [32, 64, 127, 255], "Should render 32,64,127,255 (+/-1)", 1); |
| |
| var successfullyParsed = true; |
| |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |
| |
| |
