| <!-- |
| |
| /* |
| ** Copyright (c) 2012 The Khronos Group Inc. |
| ** |
| ** Permission is hereby granted, free of charge, to any person obtaining a |
| ** copy of this software and/or associated documentation files (the |
| ** "Materials"), to deal in the Materials without restriction, including |
| ** without limitation the rights to use, copy, modify, merge, publish, |
| ** distribute, sublicense, and/or sell copies of the Materials, and to |
| ** permit persons to whom the Materials are furnished to do so, subject to |
| ** the following conditions: |
| ** |
| ** The above copyright notice and this permission notice shall be included |
| ** in all copies or substantial portions of the Materials. |
| ** |
| ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| */ |
| |
| --> |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../resources/js-test-pre.js"></script> |
| <script src="../resources/webgl-test-utils.js"></script> |
| <script id="vshader" type="x-shader/x-vertex"> |
| attribute vec3 g_Position; |
| |
| void main() |
| { |
| gl_Position = vec4(g_Position.x, g_Position.y, g_Position.z, 1.0); |
| } |
| </script> |
| |
| <script id="fshader" type="x-shader/x-fragment"> |
| void main() |
| { |
| gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| |
| </head> |
| <body> |
| <canvas id="example" width="4" height="4"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description('Verifies that GL viewport does not change when canvas is resized'); |
| |
| var err; |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("example"); |
| var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["g_Position"]); |
| |
| var vertices = new Float32Array([ |
| 1.0, 1.0, 0.0, |
| -1.0, 1.0, 0.0, |
| -1.0, -1.0, 0.0, |
| 1.0, 1.0, 0.0, |
| -1.0, -1.0, 0.0, |
| 1.0, -1.0, 0.0]); |
| var vbo = gl.createBuffer(); |
| gl.bindBuffer(gl.ARRAY_BUFFER, vbo); |
| gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW); |
| |
| gl.enableVertexAttribArray(0); |
| gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); |
| |
| // Clear and set up |
| gl.clearColor(0, 0, 1, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| gl.useProgram(program); |
| // Draw the triangle pair to the frame buffer |
| gl.drawArrays(gl.TRIANGLES, 0, 6); |
| |
| // Ensure that the frame buffer is red at the sampled pixel |
| wtu.checkCanvasRect(gl, 2, 2, 1, 1, [255, 0, 0, 255]); |
| |
| // Now resize the canvas |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "No GL errors before resizing the canvas"); |
| var canvas = gl.canvas; |
| canvas.width = 8; |
| canvas.height = 8; |
| err = gl.getError(); |
| // Some implementations might lost the context when resizing |
| if (err == gl.CONTEXT_LOST_WEBGL) { |
| testPassed("canvas lost context on resize"); |
| } else { |
| shouldBe("err", "gl.NO_ERROR"); |
| // Do another render |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| gl.drawArrays(gl.TRIANGLES, 0, 6); |
| // This time, because we did not change the viewport, it should |
| // still be (0, 0, 4, 4), so only the lower-left quadrant should |
| // have been filled. |
| wtu.checkCanvasRect(gl, 6, 6, 1, 1, [0, 0, 255, 255]); |
| } |
| |
| var successfullyParsed = true; |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
| |
