[freetype2-demos] master 9da0158: [ftstring] Display glyphs to stress test rendering.

[Alexei Podtelezhnikov]

branch: master
commit 9da0158e7cd6c8ee81d93d68c34b5e29ba0fb769
Author: Alexei Podtelezhnikov <address@hidden>
Commit: Alexei Podtelezhnikov <address@hidden>

    [ftstring] Display glyphs to stress test rendering.
    
    * src/ftstring.c (wheel_init, flower_init): New functions to
    initialize stress test glyphs.
    (main): Display them.
---
 ChangeLog      |   8 ++++
 src/ftstring.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index e0b254a..4002eba 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2018-06-17  Alexei Podtelezhnikov  <address@hidden>
 
+       [ftstring] Display glyphs to stress test rendering.
+
+       * src/ftstring.c (wheel_init, flower_init): New functions to
+       initialize stress test glyphs.
+       (main): Display them.
+
+2018-06-17  Alexei Podtelezhnikov  <address@hidden>
+
        [ftgrid] Draw dots using `FT_New_Glyph'.
 
        * src/ftgrid.c (circle_init): Make a custom glyph with a circle.
diff --git a/src/ftstring.c b/src/ftstring.c
index 12044c2..18f08d2 100644
--- a/src/ftstring.c
+++ b/src/ftstring.c
@@ -104,6 +104,108 @@
   static FTDemo_Display*  display;
   static FTDemo_Handle*   handle;
 
+  static FT_Glyph  wheel, daisy, aster;  /* stress test glyphs */
+
+
+  static void
+  wheel_init( FT_Glyph*   glyph,
+              FT_F26Dot6  radius,
+              int         reflect )
+  {
+    FT_Outline*  outline;
+    FT_Vector*   vec;
+    char*        tag;
+    FT_Pos       b, d, p = 0, q = radius;
+    int          i = 25;
+
+
+    FT_New_Glyph( handle->library, FT_GLYPH_FORMAT_OUTLINE, glyph );
+
+    outline = &((FT_OutlineGlyph)*glyph)->outline;
+
+    FT_Outline_New( handle->library, 6 * i, 1, outline );
+    outline->contours[0] = outline->n_points - 1;
+
+    for ( vec = outline->points, tag = outline->tags;
+          i--;
+          vec += 6,              tag += 6 )
+    {
+       b = p + ( q >> 6 );
+       d = q - ( p >> 6 );
+       vec[0].x = vec[3].y = 0;
+       vec[0].y = vec[3].x = 0;
+       tag[0]   = tag[3]   = FT_CURVE_TAG_ON;
+       vec[1].x = vec[5].y = p;
+       vec[1].y = vec[5].x = q;
+       tag[1]   = tag[5]   = FT_CURVE_TAG_ON;
+       vec[2].x = vec[4].y = b;
+       vec[2].y = vec[4].x = d;
+       tag[2]   = tag[4]   = FT_CURVE_TAG_ON;
+       p = b + ( d >> 6 );
+       q = d - ( b >> 6 );
+    }
+
+    if ( reflect & 1 )
+      for( vec = outline->points, i = 0; i < outline->n_points; i++, vec++ )
+        vec->x = -vec->x;
+
+    if ( reflect & 2 )
+      for( vec = outline->points, i = 0; i < outline->n_points; i++, vec++ )
+        vec->y = -vec->y;
+  }
+
+
+  static void
+  flower_init( FT_Glyph*   glyph,
+               FT_F26Dot6  radius,
+               int         reflect,
+               char        order )
+  {
+    FT_Outline*  outline;
+    FT_Vector*   vec;
+    char*        tag;
+    FT_Pos       b, d, p = 0, q = radius;
+    int          i = 25;
+
+
+    FT_New_Glyph( handle->library, FT_GLYPH_FORMAT_OUTLINE, glyph );
+
+    outline = &((FT_OutlineGlyph)*glyph)->outline;
+
+    FT_Outline_New( handle->library, 6 * i, 1, outline );
+    outline->contours[0] = outline->n_points - 1;
+
+    if ( order == FT_CURVE_TAG_CUBIC )
+      q += q / 3;
+
+    for ( vec = outline->points, tag = outline->tags;
+          i--;
+          vec += 6,              tag += 6 )
+    {
+       b = p + ( q >> 5 );
+       d = q - ( p >> 5 );
+       vec[0].x = vec[3].y = 0;
+       vec[0].y = vec[3].x = 0;
+       tag[0]   = tag[3]   = FT_CURVE_TAG_ON;
+       vec[1].x = vec[5].y = p;
+       vec[1].y = vec[5].x = q;
+       tag[1]   = tag[5]   = order;
+       vec[2].x = vec[4].y = b;
+       vec[2].y = vec[4].x = d;
+       tag[2]   = tag[4]   = order;
+       p = b;
+       q = d;
+    }
+
+    if ( reflect & 1 )
+      for( vec = outline->points, i = 0; i < outline->n_points; i++, vec++ )
+        vec->x = -vec->x;
+
+    if ( reflect & 2 )
+      for( vec = outline->points, i = 0; i < outline->n_points; i++, vec++ )
+        vec->y = -vec->y;
+  }
+
 
   /*************************************************************************/
   /*************************************************************************/
@@ -661,6 +763,10 @@
 
     parse_cmdline( &argc, &argv );
 
+    wheel_init( &wheel, 8192, 0 );
+    flower_init( &daisy, 8192, 0, FT_CURVE_TAG_CONIC );
+    flower_init( &aster, 8192, 1, FT_CURVE_TAG_CUBIC );
+
     FT_Library_SetLcdFilter( handle->library, FT_LCD_FILTER_LIGHT );
 
     handle->encoding  = status.encoding;
@@ -710,6 +816,17 @@
       switch ( status.render_mode )
       {
       case RENDER_MODE_STRING:
+        {
+          int x, y = display->bitmap->rows - 4;
+
+
+          x = 4;
+          FTDemo_Draw_Glyph( handle, display, daisy, &x, &y );
+
+          x = display->bitmap->width - 4;
+          FTDemo_Draw_Glyph( handle, display, aster, &x, &y );
+        }
+
         error = FTDemo_String_Draw( handle, display,
                                     &status.sc,
                                     display->bitmap->width / 2,