raster.cc

#include <stdio.h>
#include <stdlib.h>

#include "src/hb.h"
#include "src/hb-ot.h"

struct hb_rasterizer_t
{
  hb_ot_glyph_decompose_funcs_t *funcs;
  unsigned width, height;
  unsigned starting_stride;
  float *a;
  hb_rasterizer_t (unsigned char *memory, unsigned width_, unsigned height_)
  {
    width = width_; height = height_; starting_stride = 0;
    a = (float *) calloc (width * height, sizeof (float));
    /* Can be cached */
    funcs = hb_ot_glyph_decompose_funcs_create ();
    hb_ot_glyph_decompose_funcs_set_move_to_func (funcs, (hb_ot_glyph_decompose_move_to_func_t) move_to_);
    hb_ot_glyph_decompose_funcs_set_line_to_func (funcs, (hb_ot_glyph_decompose_line_to_func_t) line_to_);
    hb_ot_glyph_decompose_funcs_set_conic_to_func (funcs, (hb_ot_glyph_decompose_conic_to_func_t) conic_to_);
    hb_ot_glyph_decompose_funcs_set_cubic_to_func (funcs, (hb_ot_glyph_decompose_cubic_to_func_t) cubic_to_);
    hb_ot_glyph_decompose_funcs_set_close_path_func (funcs, (hb_ot_glyph_decompose_close_path_func_t) close_path_);
  }
  ~hb_rasterizer_t () { free (a); hb_ot_glyph_decompose_funcs_destroy (funcs); }

  void set_starting_stride (unsigned starting_stride_) { starting_stride = starting_stride_; }

  void draw_glyph (hb_font_t *font, hb_codepoint_t gid, unsigned *w/*OUT*/, unsigned *h/*OUT*/, unsigned *stride/*OUT*/)
  { draw_glyphs (font, 1, &gid, &starting_stride, &width, &height, w, h, stride); }
  void draw_glyphs (hb_font_t *font, unsigned glyph_count,
		    hb_codepoint_t *gids/*IN*/, unsigned *starting_stride/*IN*/,
		    unsigned *width/*IN*/, unsigned *height/*IN*/,
		    unsigned *w/*OUT*/, unsigned *h/*OUT*/, unsigned *stride/*OUT*/)
  {
    // fill w and h out array from hb_get_glyph_extents
    for (unsigned int i = 0; i < glyph_count; ++i)
      hb_ot_glyph_decompose (font, gids[i], funcs, this);
    accumulate ();
  }

  void move_to (hb_position_t to_x, hb_position_t to_y) {}
  void line_to (hb_position_t to_x, hb_position_t to_y) {}
  void conic_to (hb_position_t control_x, hb_position_t control_y,
		 hb_position_t to_x, hb_position_t to_y) {}
  void cubic_to (hb_position_t control1_x, hb_position_t control1_y,
		 hb_position_t control2_x, hb_position_t control2_y,
		 hb_position_t to_x, hb_position_t to_y) {}
  void close_path () {}

  void accumulate ()
  {
    // accumulate https://github.com/raphlinus/font-rs/blob/master/src/accumulate.rs#L70
    // and return https://github.com/raphlinus/font-rs/blob/master/src/raster.rs#L137
  }

  static void move_to_ (hb_position_t to_x, hb_position_t to_y, hb_rasterizer_t &self)
  { self.move_to (to_x, to_y); }
  static void line_to_ (hb_position_t to_x, hb_position_t to_y, hb_rasterizer_t &self)
  { self.line_to (to_x, to_y); }
  static void conic_to_ (hb_position_t control_x, hb_position_t control_y,
			 hb_position_t to_x, hb_position_t to_y,
			 hb_rasterizer_t &self)
  { self.conic_to (control_x, control_y, to_x, to_y); }
  static void cubic_to_ (hb_position_t control1_x, hb_position_t control1_y,
			 hb_position_t control2_x, hb_position_t control2_y,
			 hb_position_t to_x, hb_position_t to_y,
			 hb_rasterizer_t &self)
  { self.cubic_to (control1_x, control1_y, control2_x, control2_y, to_x, to_y); }
  static void close_path_ (hb_rasterizer_t &self) { self.close_path (); }
};

int main ()
{
  printf ("asdasd");
}