1 files changed, 31 insertions, 0 deletions
diff --git a/text/shape-build.h b/text/shape-build.h
new file mode 100644
index 0000000..dd93177
--- /dev/null
+++ b/text/shape-build.h
@@ -0,0 +1,31 @@
+#ifndef VEGA_SHAPE_BUILD_H
+#define VEGA_SHAPE_BUILD_H
+#include "shape.h"
+#include <hb.h>
+#include <stdio.h>
+
+/* Building a shaping section (text/shape.h), and checking it, with
+ * HarfBuzz: only the build tool links this. */
+
+typedef struct { unsigned char *bytes; size_t size; } VegaSection;
+
+/* A section for face: plans for each script (ISO 15924 tags) and both
+ * directions, compiled as
+ * HarfBuzz's planner compiles it. Refuses a script HarfBuzz shapes with a
+ * shaper other than the default, Arabic and Hebrew ones, or a font that
+ * needs what those do without GPOS (fallback positioning, 'kern' tables,
+ * AAT). glyphs, when given, gets every glyph shaping can reach from codes
+ * (for their outlines). */
+bool vega_shaping_compile(hb_face_t *face, const uint32_t *scripts, size_t script_count, const uint32_t *codes,
+                          size_t code_count, VegaSection *out, hb_set_t *glyphs, char *error, size_t error_size);
+
+typedef struct {
+    size_t runs, characters, glyphs, differences;
+    double vega_seconds, harfbuzz_seconds; /* shaping alone, each */
+} VegaShapeCheck;
+/* Shape runs random runs of script (in its plan's direction) made of codes
+ * with both the section and HarfBuzz, and count the runs that differ (the
+ * first few are written to report). */
+void vega_shaping_check(hb_font_t *font, const VegaShaping *s, uint32_t script, int direction, const uint32_t *codes,
+                        size_t code_count, uint64_t seed, size_t runs, VegaShapeCheck *out, FILE *report);
+#endif