[draw/glyf] Emit empty contours
This makes it actually match freetype behaviour even though rasterizer should filter such contours specially for stroking. See https://github.com/harfbuzz/harfbuzz/pull/3411#discussion_r802283827 for the context.
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@ -1251,6 +1251,12 @@ struct glyf
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font->em_fscalef_x (first_oncurve.x), font->em_fscalef_y (first_oncurve.y));
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else if (first_oncurve.has_data)
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draw_session->line_to (font->em_fscalef_x (first_oncurve.x), font->em_fscalef_y (first_oncurve.y));
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else if (first_offcurve.has_data)
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{
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float x = font->em_fscalef_x (first_offcurve.x), y = font->em_fscalef_x (first_offcurve.y);
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draw_session->move_to (x, y);
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draw_session->quadratic_to (x, y, x, y);
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}
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/* Getting ready for the next contour */
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first_oncurve = first_offcurve = last_offcurve = optional_point_t ();
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@ -369,7 +369,7 @@ test_hb_draw_ttf_parser_tests (void)
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{
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draw_data.consumed = 0;
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hb_font_get_glyph_shape (font, 5, funcs, &draw_data);
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char expected[] = "";
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char expected[] = "M15,0Q15,0 15,0Z";
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g_assert_cmpmem (str, draw_data.consumed, expected, sizeof (expected) - 1);
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}
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{
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@ -378,7 +378,8 @@ test_hb_draw_ttf_parser_tests (void)
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char expected[] = "M346,468L211,468L211,0L123,0L123,468L29,468L29,509L123,539"
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"L123,570Q123,674 169,720Q215,765 297,765Q329,765 356,760"
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"Q382,754 401,747L378,678Q362,683 341,688Q320,693 298,693"
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"Q254,693 233,664Q211,634 211,571L211,536L346,536L346,468Z";
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"Q254,693 233,664Q211,634 211,571L211,536L346,536L346,468Z"
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"M15,0Q15,0 15,0Z";
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g_assert_cmpmem (str, draw_data.consumed, expected, sizeof (expected) - 1);
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}
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