Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/blenkernel/BKE_vfontdata.hh

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+/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+/** \file
+ * \ingroup bke
+ * \brief A structure to represent vector fonts,
+ *   and to load them from PostScript fonts.
+ */
+
+#include "DNA_listBase.h"
+
+#include "BLI_map.hh"
+
+#include "DNA_vec_types.h"
+
+namespace blender {
+
+struct Nurb;
+struct PackedFile;
+struct VFont;
+
+/**
+ * Font metric values explained:
+ *
+ * Baseline: Line where the text "rests", used as the origin vertical position for the glyphs.
+ * Em height: Space most glyphs should fit within.
+ * Ascent: the recommended distance above the baseline to fit most characters.
+ * Descent: the recommended distance below the baseline to fit most characters.
+ *
+ * We obtain ascent and descent from the font itself (`FT_Face->ascender / face->height`).
+ * And in some cases it is even the same value as `FT_Face->bbox.yMax / yMin`.
+ * (font top and bottom respectively).
+ *
+ * The `em_ratio` here is relative to `FT_Face->bbox`.
+ */
+struct VFontData_Metrics {
+  float scale;
+  /* Calculated from the font. */
+  float em_ratio;
+  float ascend_ratio;
+};
+
+struct VFontData {
+  /**
+   * A hash that maps `uint -> VChar` (code-points to character outlines).
+   *
+   * \note values may be null when the character does not exist in the font.
+   * This is done to differentiate characters known not to exist from
+   * characters that have not yet been loaded.
+   */
+  Map<uint, struct VChar *> *characters;
+  char name[128];
+
+  VFontData_Metrics metrics;
+};
+
+struct VChar {
+  ListBaseT<Nurb> nurbsbase;
+  float width;
+  /** Glyph bounding box from FreeType metrics (scaled to VFont units). */
+  rctf bounds;
+};
+
+/**
+ * Default metrics to use when the font wont load.
+ */
+void BKE_vfontdata_metrics_get_defaults(VFontData_Metrics *metrics);
+
+/**
+ * Construct a new #VFontData structure from free-type font data in `pf`.
+ *
+ * \param pf: The font data.
+ * \retval A new #VFontData structure, or NULL if unable to load.
+ */
+VFontData *BKE_vfontdata_from_freetypefont(PackedFile *pf);
+VFontData *BKE_vfontdata_copy(const VFontData *vfont_src, int flag);
+
+VChar *BKE_vfontdata_char_from_freetypefont(VFont *vfont, unsigned int character);
+VChar *BKE_vfontdata_char_copy(const VChar *vchar_src);
+
+}  // namespace blender