| <!-- |
| 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>Point-specific shader variables test</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="c" width="64" height="64"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| |
| <script id="vs-assign" type="x-shader/x-vertex"> |
| attribute vec2 aPosition; |
| |
| varying vec2 vPos; |
| |
| void main() |
| { |
| gl_Position = vec4(aPosition, 0, 1); |
| vPos = aPosition; |
| |
| gl_PointSize = 1.0; |
| } |
| </script> |
| |
| <script id="vs-conditional" type="x-shader/x-vertex"> |
| uniform float renderingPoints; // not assigned, equal to 0.0 |
| attribute vec2 aPosition; |
| |
| varying vec2 vPos; |
| |
| void main() |
| { |
| gl_Position = vec4(aPosition, 0, 1); |
| vPos = aPosition; |
| |
| if (renderingPoints > 0.0) { |
| gl_PointSize = 1.0; |
| } |
| } |
| </script> |
| |
| <script id="fs-overwrite" type="x-shader/x-fragment"> |
| varying mediump vec2 vPos; |
| |
| void main() |
| { |
| gl_FragColor = vec4(gl_PointCoord.xy, 0, 1); |
| gl_FragColor = vec4(vPos * -2.0, 0, 1); |
| } |
| </script> |
| |
| <script id="fs-unused-branch" type="x-shader/x-fragment"> |
| varying mediump vec2 vPos; |
| uniform mediump float uDefaultsToZero; |
| |
| void main() |
| { |
| gl_FragColor = vec4(vPos * -2.0, 0, 1); |
| if (uDefaultsToZero == 1.0) { |
| gl_FragColor = vec4(gl_PointCoord.xy, 0, 1); |
| } |
| } |
| </script> |
| |
| <script> |
| "use strict"; |
| description(document.title); |
| |
| debug('This test verifies rendering with programs referencing shader variables specific to rendering of POINTS primitives.'); |
| |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("c", {depth: false}); |
| |
| var prog_overwrite = wtu.setupProgram(gl, ["vs-assign", "fs-overwrite"], ["aPosition"]); |
| var prog_branch = wtu.setupProgram(gl, ["vs-assign", "fs-unused-branch"], ["aPosition"]); |
| var prog_cond_overwrite = wtu.setupProgram(gl, ["vs-conditional", "fs-overwrite"], ["aPosition"]); |
| var prog_cond_branch = wtu.setupProgram(gl, ["vs-conditional", "fs-unused-branch"], ["aPosition"]); |
| |
| var vertData = new Float32Array([ |
| -1, -1, |
| +1, -1, |
| -1, +1, |
| ]); |
| |
| var vertexObject = gl.createBuffer(); |
| gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); |
| gl.bufferData(gl.ARRAY_BUFFER, vertData, gl.STATIC_DRAW); |
| |
| gl.enableVertexAttribArray(0); |
| gl.vertexAttribPointer(0, 2, gl.FLOAT, false, 0, 0); |
| |
| ////////// |
| |
| debug(""); |
| debug("prog-overwrite"); |
| |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 0, 0, 0]); // Bottom-left |
| |
| gl.useProgram(prog_overwrite); |
| gl.drawArrays(gl.TRIANGLES, 0, 3); |
| |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [255, 255, 0, 255]); // Bottom-left |
| wtu.checkCanvasRect(gl, 63, 63, 1, 1, [0, 0, 0, 0]); // Top-right |
| |
| |
| ////////// |
| |
| debug(""); |
| debug("prog-branch"); |
| |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 0, 0, 0]); // Bottom-left |
| |
| gl.useProgram(prog_branch); |
| gl.drawArrays(gl.TRIANGLES, 0, 3); |
| |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [255, 255, 0, 255]); // Bottom-left |
| wtu.checkCanvasRect(gl, 63, 63, 1, 1, [0, 0, 0, 0]); // Top-right |
| |
| ////////// |
| |
| debug(""); |
| debug("prog-cond-overwrite"); |
| |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 0, 0, 0]); // Bottom-left |
| |
| gl.useProgram(prog_cond_overwrite); |
| gl.drawArrays(gl.TRIANGLES, 0, 3); |
| |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [255, 255, 0, 255]); // Bottom-left |
| wtu.checkCanvasRect(gl, 63, 63, 1, 1, [0, 0, 0, 0]); // Top-right |
| |
| |
| ////////// |
| |
| debug(""); |
| debug("prog-cond-branch"); |
| |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 0, 0, 0]); // Bottom-left |
| |
| gl.useProgram(prog_cond_branch); |
| gl.drawArrays(gl.TRIANGLES, 0, 3); |
| |
| wtu.checkCanvasRect(gl, 0, 0, 1, 1, [255, 255, 0, 255]); // Bottom-left |
| wtu.checkCanvasRect(gl, 63, 63, 1, 1, [0, 0, 0, 0]); // Top-right |
| |
| var successfullyParsed = true; |
| </script> |
| |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |