FF 48: layers.offmainthreadcomposition.enabled (OMTC)

[Yaron10]

Hello,

I use the following code (in an extension) to toggle Font-Smoothing:

Code: Select all

Components.utils.import("resource://gre/modules/ctypes.jsm");
var lib = ctypes.open("user32.dll");

var boolObjFunc = function() { this.BOOL = ctypes.bool; }
var boolObj = new boolObjFunc();
var fontSmooth = lib.declare("SystemParametersInfoW", ctypes.winapi_abi, boolObj.BOOL, ctypes.unsigned_int, ctypes.unsigned_int, ctypes.voidptr_t, ctypes.unsigned_int);
var isFontSmoothOn = boolObj.BOOL();

fontSmooth(0x004A, 0, isFontSmoothOn.address(), 0);   // 0x004A = SPI_GETFONTSMOOTHING.
fontSmooth(0x004B, ! isFontSmoothOn.value, ctypes.voidptr_t(0), 0);    // 0x004B = SPI_SETFONTSMOOTHING.
lib.close();

Prior to FF 48:

If e10s and OMTC are disabled, the page's content is immediately repainted and displayed according to the new value.
If, however, OMTC is enabled, I need to manually repaint the window (i.e. minimize/restore the window, zoom-in/out etc.).

FF 48:

layers.offmainthreadcomposition.enabled (OMTC) doesn't seem to have any effect.
The page's content is not repainted regardless of its value (e10s is still disabled).

I'd appreciate your help.

[Yaron10]

Hello,

Just found the answer.
https://www.reddit.com/r/firefox/commen ... ppened_to/

BR