| <!-- |
| 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>GLSL 3.00 forward declaration 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> |
| <script src="../../js/glsl-conformance-test.js"></script> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="vertexShaderForwardDecl" type="x-shader/x-vertex">#version 300 es |
| precision mediump float; |
| |
| // Forward declaration. Breaks on Pixel C due to flattening of |
| // precision qualifiers. It seems the GLSL compiler can't handle the |
| // precision qualifier on the return value. |
| float identity(float val); |
| |
| float identity(float val) { |
| return val; |
| } |
| |
| void main(void) { |
| gl_Position = vec4(identity(1.0), 0.0, 0.0, 1.0); |
| } |
| </script> |
| <script id="vertexShader" type="x-shader/x-vertex">#version 300 es |
| void main(void) { |
| gl_Position = vec4(1.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| <script id="fragmentShader" type="x-shader/x-fragment">#version 300 es |
| precision mediump float; |
| |
| out vec4 my_FragColor; |
| void main(void) { |
| my_FragColor = vec4(0.0, 1.0, 0.0, 1.0); |
| } |
| </script> |
| <script id="fragmentShaderForwardDecl" type="x-shader/x-fragment">#version 300 es |
| precision mediump float; |
| |
| // Forward declaration. Breaks on Pixel C due to flattening of |
| // precision qualifiers. It seems the GLSL compiler can't handle the |
| // precision qualifier on the return value. |
| float identity(float val); |
| |
| float identity(float val) { |
| return val; |
| } |
| |
| out vec4 my_FragColor; |
| void main(void) { |
| my_FragColor = vec4(0.0, identity(1.0), 0.0, 1.0); |
| } |
| </script> |
| <script type="application/javascript"> |
| "use strict"; |
| description("Forward declarations of functions should succeed."); |
| |
| GLSLConformanceTester.runTests([ |
| { |
| vShaderId: "vertexShaderForwardDecl", |
| vShaderSuccess: true, |
| fShaderId: "fragmentShader", |
| fShaderSuccess: true, |
| linkSuccess: true, |
| passMsg: "vertex shader with forward declaration must pass", |
| }, |
| { |
| vShaderId: "vertexShader", |
| vShaderSuccess: true, |
| fShaderId: "fragmentShaderForwardDecl", |
| fShaderSuccess: true, |
| linkSuccess: true, |
| passMsg: "fragment shader with forward declaration must pass", |
| }, |
| ], 2); |
| </script> |
| </body> |
| </html> |
