| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="stylesheet" href="resources/webgl_test_files/resources/js-test-style.css"/> |
| <script src="resources/webgl_test_files/js/js-test-pre.js"></script> |
| <script src="resources/webgl_test_files/js/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| |
| description("Test that readPixels with invalid PBO offsets are properly validated and don't cause crashes."); |
| |
| var wtu = WebGLTestUtils; |
| var gl; |
| var expected = [51, 102, 204, 204]; |
| var expectedNoAlpha = [51, 102, 204, 255]; |
| var pixels; |
| |
| function runTest(contextOptions) { |
| var canvas = document.createElement("canvas"); |
| var gl = wtu.create3DContext(canvas, contextOptions, 2); |
| |
| gl.clearColor(0.2, 0.4, 0.8, 0.8); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| var pbo = gl.createBuffer(); |
| gl.bindBuffer(gl.PIXEL_PACK_BUFFER, pbo); |
| var bufferSize = 64 * 64 * 4; |
| gl.bufferData(gl.PIXEL_PACK_BUFFER, bufferSize, gl.DYNAMIC_READ); |
| gl.bindBuffer(gl.COPY_READ_BUFFER, pbo); // For verification getBufferSubData() calls below. |
| |
| gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, 0); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "offset==0"); |
| pixels = new Uint8Array(4); |
| gl.getBufferSubData(gl.COPY_READ_BUFFER, 0, pixels); |
| if (contextOptions.alpha) |
| shouldBe("pixels", "expected"); |
| else |
| shouldBe("pixels", "expectedNoAlpha"); |
| |
| |
| gl.bufferData(gl.COPY_READ_BUFFER, bufferSize, gl.DYNAMIC_READ); |
| gl.readPixels(0, 0, 32, 32, gl.RGBA, gl.UNSIGNED_BYTE, 256); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "32x32, offset=256"); |
| pixels = new Uint8Array(4); |
| gl.getBufferSubData(gl.COPY_READ_BUFFER, 256, pixels); |
| if (contextOptions.alpha) |
| shouldBe("pixels", "expected"); |
| else |
| shouldBe("pixels", "expectedNoAlpha"); |
| pixels = new Uint8Array(4); |
| gl.getBufferSubData(gl.COPY_READ_BUFFER, 0, pixels); |
| shouldBe("pixels", "[0, 0, 0, 0]"); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, -1); |
| wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "offset=-1"); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, 4); |
| wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "offset==4"); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, bufferSize); |
| wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "offset==bufferSize"); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, bufferSize - 1); |
| wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "offset==bufferSize - 1"); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, 0x7FFFFFFF); |
| wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "offset==0x7FFFFFFF"); |
| |
| gl.readPixels(0, 0, 64, 64, gl.RGBA, gl.UNSIGNED_BYTE, 0x7FFFFFFD); |
| wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "offset==0x7FFFFFFD"); |
| } |
| |
| for (let alpha of [true, false]) { |
| for (let antialias of [true, false]) |
| runTest({alpha, antialias}); |
| } |
| finishTest(); |
| </script> |
| </body> |
| </html> |
