From e2c5dfc06eee6caa0638f7da40bb3b318e19995b Mon Sep 17 00:00:00 2001
From: kkapsner <github@mail.kkapsner.de>
Date: Sun, 3 Jan 2021 21:11:17 +0100
Subject: [PATCH] added {disabled} to UNMASKED_VENDOR_WEBGL and
 UNMASKED_RENDERER_WEBGL

to disabled the WEBGL_debug_renderer_info extension

Fixes #508
---
 lib/modifiedCanvasAPI.js  | 40 +++++++++++++++++++++++++++++++++++++++
 lib/settingDefinitions.js |  2 +-
 lib/webgl.js              |  2 ++
 releaseNotes.txt          |  1 +
 versions/updates.json     |  4 ++++
 5 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/lib/modifiedCanvasAPI.js b/lib/modifiedCanvasAPI.js
index f78f5da..c4a9b9c 100644
--- a/lib/modifiedCanvasAPI.js
+++ b/lib/modifiedCanvasAPI.js
@@ -534,6 +534,46 @@
 				};
 			}
 		},
+		getExtension: {
+			type: "readout",
+			getStatus: createGetStatus(["readout", "input"]),
+			object: ["WebGLRenderingContext", "WebGL2RenderingContext"],
+			fakeGenerator: function(checker){
+				return function getExtension(extensionName){
+					return checkerWrapper(checker, this, arguments, function(args, check){
+						const {prefs, notify, window, original} = check;
+						const originalValue = original.call(this, ...args);
+						if (
+							extensionName === "WEBGL_debug_renderer_info" &&
+							originalValue &&
+							webgl.parameterChangeDefinition[originalValue.UNMASKED_VENDOR_WEBGL] &&
+							webgl.parameterChangeDefinition[originalValue.UNMASKED_RENDERER_WEBGL]
+						){
+							const vendorDef = webgl.parameterChangeDefinition[originalValue.UNMASKED_VENDOR_WEBGL];
+							const {vendorValue, vendorFaked} = vendorDef.fake(originalValue, window, prefs);
+							const rendererDef = webgl.parameterChangeDefinition[originalValue.UNMASKED_RENDERER_WEBGL];
+							const {rendererValue, rendererFaked} = vendorDef.fake(originalValue, window, prefs);
+							if (
+								vendorFaked && vendorValue === null &&
+								rendererFaked && rendererValue === null
+							){
+								const value = null;
+								if (originalValue !== value){
+									notify("fakedReadout");
+								}
+								return value;
+							}
+							else {
+								return originalValue;
+							}
+						}
+						else {
+							return originalValue;
+						}
+					});
+				};
+			}
+		},
 		convertToBlob: {
 			type: "readout",
 			getStatus: createGetStatus("readout"),
diff --git a/lib/settingDefinitions.js b/lib/settingDefinitions.js
index 398b488..625d6e0 100644
--- a/lib/settingDefinitions.js
+++ b/lib/settingDefinitions.js
@@ -100,7 +100,7 @@
 				{message: "input", level: 2},
 				"fillText @ canvas", "strokeText @ canvas",
 				{name: "webGL", level: 2},
-				"readPixels @ canvas", "getParameter @ canvas",
+				"readPixels @ canvas", "getParameter @ canvas", "getExtension @ canvas",
 				{name: "Audio-API", level: 1},
 				"getFloatFrequencyData @ audio", "getByteFrequencyData @ audio",
 				"getFloatTimeDomainData @ audio", "getByteTimeDomainData @ audio",
diff --git a/lib/webgl.js b/lib/webgl.js
index 7caca17..8cf30a8 100644
--- a/lib/webgl.js
+++ b/lib/webgl.js
@@ -136,6 +136,8 @@
 					return false;
 				case "{empty}":
 					return "";
+				case "{disabled}":
+					return null;
 			}
 			return settingValue;
 		},
diff --git a/releaseNotes.txt b/releaseNotes.txt
index 1487cc0..48b0a80 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -4,6 +4,7 @@ Version 1.5:
 	
 	new features:
 		- added {empty}, {false} and {undefined} to webGL preference parameters (i.e. VENDOR, RENDERER, UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL)
+		- added {disabled} to UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL to disabled the WEBGL_debug_renderer_info extension
 		- improved performance for protected canvas part "input"
 	
 	fixes:
diff --git a/versions/updates.json b/versions/updates.json
index fff32bc..ea04719 100644
--- a/versions/updates.json
+++ b/versions/updates.json
@@ -153,6 +153,10 @@
 				{
 					"version": "1.5Alpha20201109",
 					"update_link": "https://canvasblocker.kkapsner.de/versions/canvasblocker_beta-1.5Alpha20201109-an+fx.xpi"
+				},
+				{
+					"version": "1.5Alpha20210103",
+					"update_link": "https://canvasblocker.kkapsner.de/versions/canvasblocker_beta-1.5Alpha20210103-an+fx.xpi"
 				}
 			]
 		}