Add Freetype2 to includes and lib folders, update CMakeLists.txt to

properly build the text_rendering example as just one more project.
2026-01-30 20:13:22 +08:00 · 2020-06-23 09:59:08 -04:00
parent 4132da36f8
commit 38749dff87
95 changed files with 37505 additions and 2 deletions
--- a/includes/freetype/ftpfr.h
+++ b/includes/freetype/ftpfr.h
@@ -0,0 +1,180 @@
+/****************************************************************************
+ *
+ * ftpfr.h
+ *
+ *   FreeType API for accessing PFR-specific data (specification only).
+ *
+ * Copyright (C) 2002-2020 by
+ * David Turner, Robert Wilhelm, and Werner Lemberg.
+ *
+ * This file is part of the FreeType project, and may only be used,
+ * modified, and distributed under the terms of the FreeType project
+ * license, LICENSE.TXT.  By continuing to use, modify, or distribute
+ * this file you indicate that you have read the license and
+ * understand and accept it fully.
+ *
+ */
+
+
+#ifndef FTPFR_H_
+#define FTPFR_H_
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+#ifdef FREETYPE_H
+#error "freetype.h of FreeType 1 has been loaded!"
+#error "Please fix the directory search order for header files"
+#error "so that freetype.h of FreeType 2 is found first."
+#endif
+
+
+FT_BEGIN_HEADER
+
+
+  /**************************************************************************
+   *
+   * @section:
+   *   pfr_fonts
+   *
+   * @title:
+   *   PFR Fonts
+   *
+   * @abstract:
+   *   PFR/TrueDoc-specific API.
+   *
+   * @description:
+   *   This section contains the declaration of PFR-specific functions.
+   *
+   */
+
+
+  /**************************************************************************
+   *
+   * @function:
+   *    FT_Get_PFR_Metrics
+   *
+   * @description:
+   *    Return the outline and metrics resolutions of a given PFR face.
+   *
+   * @input:
+   *    face ::
+   *      Handle to the input face.  It can be a non-PFR face.
+   *
+   * @output:
+   *    aoutline_resolution ::
+   *      Outline resolution.  This is equivalent to `face->units_per_EM` for
+   *      non-PFR fonts.  Optional (parameter can be `NULL`).
+   *
+   *    ametrics_resolution ::
+   *      Metrics resolution.  This is equivalent to `outline_resolution` for
+   *      non-PFR fonts.  Optional (parameter can be `NULL`).
+   *
+   *    ametrics_x_scale ::
+   *      A 16.16 fixed-point number used to scale distance expressed in
+   *      metrics units to device subpixels.  This is equivalent to
+   *      `face->size->x_scale`, but for metrics only.  Optional (parameter
+   *      can be `NULL`).
+   *
+   *    ametrics_y_scale ::
+   *      Same as `ametrics_x_scale` but for the vertical direction.
+   *      optional (parameter can be `NULL`).
+   *
+   * @return:
+   *    FreeType error code.  0~means success.
+   *
+   * @note:
+   *   If the input face is not a PFR, this function will return an error.
+   *   However, in all cases, it will return valid values.
+   */
+  FT_EXPORT( FT_Error )
+  FT_Get_PFR_Metrics( FT_Face    face,
+                      FT_UInt   *aoutline_resolution,
+                      FT_UInt   *ametrics_resolution,
+                      FT_Fixed  *ametrics_x_scale,
+                      FT_Fixed  *ametrics_y_scale );
+
+
+  /**************************************************************************
+   *
+   * @function:
+   *    FT_Get_PFR_Kerning
+   *
+   * @description:
+   *    Return the kerning pair corresponding to two glyphs in a PFR face.
+   *    The distance is expressed in metrics units, unlike the result of
+   *    @FT_Get_Kerning.
+   *
+   * @input:
+   *    face ::
+   *      A handle to the input face.
+   *
+   *    left ::
+   *      Index of the left glyph.
+   *
+   *    right ::
+   *      Index of the right glyph.
+   *
+   * @output:
+   *    avector ::
+   *      A kerning vector.
+   *
+   * @return:
+   *    FreeType error code.  0~means success.
+   *
+   * @note:
+   *    This function always return distances in original PFR metrics units.
+   *    This is unlike @FT_Get_Kerning with the @FT_KERNING_UNSCALED mode,
+   *    which always returns distances converted to outline units.
+   *
+   *    You can use the value of the `x_scale` and `y_scale` parameters
+   *    returned by @FT_Get_PFR_Metrics to scale these to device subpixels.
+   */
+  FT_EXPORT( FT_Error )
+  FT_Get_PFR_Kerning( FT_Face     face,
+                      FT_UInt     left,
+                      FT_UInt     right,
+                      FT_Vector  *avector );
+
+
+  /**************************************************************************
+   *
+   * @function:
+   *    FT_Get_PFR_Advance
+   *
+   * @description:
+   *    Return a given glyph advance, expressed in original metrics units,
+   *    from a PFR font.
+   *
+   * @input:
+   *    face ::
+   *      A handle to the input face.
+   *
+   *    gindex ::
+   *      The glyph index.
+   *
+   * @output:
+   *    aadvance ::
+   *      The glyph advance in metrics units.
+   *
+   * @return:
+   *    FreeType error code.  0~means success.
+   *
+   * @note:
+   *    You can use the `x_scale` or `y_scale` results of @FT_Get_PFR_Metrics
+   *    to convert the advance to device subpixels (i.e., 1/64th of pixels).
+   */
+  FT_EXPORT( FT_Error )
+  FT_Get_PFR_Advance( FT_Face   face,
+                      FT_UInt   gindex,
+                      FT_Pos   *aadvance );
+
+  /* */
+
+
+FT_END_HEADER
+
+#endif /* FTPFR_H_ */
+
+
+/* END */