Re: [PATCH 0/1] MR3718: dwrite: Fix incorrect position of glyph when using BitmapRenderTarget in HiDPI

[Nikolay Sivov (＠nsivov)]

Nikolay Sivov (@nsivov) commented about dlls/dwrite/tests/font.c:
> - ok(c == RGB(255, 0, 0), "got 0x%08lx\n", c);
> -
> - /* Doubled ppdip */
> - hr = IDWriteBitmapRenderTarget_SetPixelsPerDip(target, 2.0);
> - ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
> -
> - SetDCBrushColor(hdc, 0);
> - SelectObject(hdc, GetStockObject(DC_BRUSH));
> - Rectangle(hdc, 0, 0, 400, 400);
> - hr = IDWriteBitmapRenderTarget_DrawGlyphRun(target, 30.0f, 65.0f, DWRITE_MEASURING_MODE_GDI_NATURAL,
> -
>    &run, params, RGB(255, 0, 0), &box);
> - ok(hr == S_OK, "Failed to draw a run, hr %#lx.\n", hr);
> - c = GetPixel(hdc, 30 + 2, 65 - 2);
> - ok(c == RGB(0, 0, 0), "got 0x%08lx\n", c);
> - c = GetPixel(hdc, 30 * 2 + 2, 65 * 2 - 2);
> - ok(c == RGB(255, 0, 0), "got 0x%08lx\n", c);

This looks very unreliable. We could add some special font that has full black rectangle for some glyph, and use that.