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In Firefox 65 beta, one of the option of ClearType rendering modes not works

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OS: Windows 10 Pro

Version: 65.0b7 (64-bit)

After I upgraded my Firefox to 65 beta, the option in about:config, `gfx.font_rendering.cleartype_params.rendering_mode=5` seems not to be effective. Is the entry is now obsolete?

OS: Windows 10 Pro Version: 65.0b7 (64-bit) After I upgraded my Firefox to 65 beta, the option in about:config, `gfx.font_rendering.cleartype_params.rendering_mode=5` seems not to be effective. Is the entry is now obsolete?

Modified by eqlv12

Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0

More Information

jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Microsoft says this about the difference between 4 and 5:

4 = DWRITE_RENDERING_MODE_NATURAL

"Specifies that antialiasing is performed in the horizontal direction. This rendering mode allows glyphs to be positioned with subpixel precision and is therefore suitable for natural (i.e., resolution-independent) layout. The antialiasing may be either ClearType or grayscale depending on the text antialiasing mode."

5 = DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC

"Similar to natural mode except that antialiasing is performed in both the horizontal and vertical directions. This is typically used at larger sizes to make curves and diagonal lines look smoother. The antialiasing may be either ClearType or grayscale depending on the text antialiasing mode."

But it sounds as though you are seeing something very different with 5 than you see with 4 (or -1, which I think defaults to NATURAL). What are you seeing?

Microsoft [https://docs.microsoft.com/en-us/windows/desktop/api/dwrite/ne-dwrite-dwrite_rendering_mode says this about] the difference between 4 and 5: 4 = DWRITE_RENDERING_MODE_NATURAL "Specifies that antialiasing is performed in the horizontal direction. This rendering mode allows glyphs to be positioned with subpixel precision and is therefore suitable for natural (i.e., resolution-independent) layout. The antialiasing may be either ClearType or grayscale depending on the text antialiasing mode." 5 = DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC "Similar to natural mode except that antialiasing is performed in both the horizontal and vertical directions. This is typically used at larger sizes to make curves and diagonal lines look smoother. The antialiasing may be either ClearType or grayscale depending on the text antialiasing mode." But it sounds as though you are seeing something very different with 5 than you see with 4 (or -1, which I think defaults to NATURAL). What are you seeing?