| #include <assert.h> |
| #include <stdlib.h> |
| |
| #include <hb-ot.h> |
| |
| #include "hb-fuzzer.hh" |
| |
| struct _draw_data_t |
| { |
| unsigned path_len; |
| float path_start_x; |
| float path_start_y; |
| float path_last_x; |
| float path_last_y; |
| }; |
| |
| #include <cstdio> |
| static void |
| _move_to (hb_draw_funcs_t *dfuncs, void *draw_data_, |
| hb_draw_state_t *st, |
| float to_x, float to_y, |
| void *user_data) |
| { |
| _draw_data_t *draw_data = (_draw_data_t *) draw_data_; |
| assert (!st->path_open); |
| draw_data->path_start_x = draw_data->path_last_x = to_x; |
| draw_data->path_start_y = draw_data->path_last_y = to_y; |
| } |
| |
| static void |
| _line_to (hb_draw_funcs_t *dfuncs, void *draw_data_, |
| hb_draw_state_t *st, |
| float to_x, float to_y, |
| void *user_data) |
| { |
| _draw_data_t *draw_data = (_draw_data_t *) draw_data_; |
| assert (st->path_open); |
| ++draw_data->path_len; |
| draw_data->path_last_x = to_x; |
| draw_data->path_last_y = to_y; |
| } |
| |
| static void |
| _quadratic_to (hb_draw_funcs_t *dfuncs, void *draw_data_, |
| hb_draw_state_t *st, |
| float control_x, float control_y, |
| float to_x, float to_y, |
| void *user_data) |
| { |
| _draw_data_t *draw_data = (_draw_data_t *) draw_data_; |
| assert (st->path_open); |
| ++draw_data->path_len; |
| draw_data->path_last_x = to_x; |
| draw_data->path_last_y = to_y; |
| } |
| |
| static void |
| _cubic_to (hb_draw_funcs_t *dfuncs, void *draw_data_, |
| hb_draw_state_t *st, |
| float control1_x, float control1_y, |
| float control2_x, float control2_y, |
| float to_x, float to_y, |
| void *user_data) |
| { |
| _draw_data_t *draw_data = (_draw_data_t *) draw_data_; |
| assert (st->path_open); |
| ++draw_data->path_len; |
| draw_data->path_last_x = to_x; |
| draw_data->path_last_y = to_y; |
| } |
| |
| static void |
| _close_path (hb_draw_funcs_t *dfuncs, void *draw_data_, |
| hb_draw_state_t *st, |
| void *user_data) |
| { |
| _draw_data_t *draw_data = (_draw_data_t *) draw_data_; |
| assert (st->path_open && draw_data->path_len != 0); |
| draw_data->path_len = 0; |
| assert (draw_data->path_start_x == draw_data->path_last_x && |
| draw_data->path_start_y == draw_data->path_last_y); |
| } |
| |
| /* Similar to test-ot-face.c's #test_font() */ |
| static void misc_calls_for_gid (hb_face_t *face, hb_font_t *font, hb_set_t *set, hb_codepoint_t cp) |
| { |
| /* Other gid specific misc calls */ |
| hb_face_collect_variation_unicodes (face, cp, set); |
| |
| hb_codepoint_t g; |
| hb_font_get_nominal_glyph (font, cp, &g); |
| hb_font_get_variation_glyph (font, cp, cp, &g); |
| hb_font_get_glyph_h_advance (font, cp); |
| hb_font_get_glyph_v_advance (font, cp); |
| hb_position_t x, y; |
| hb_font_get_glyph_h_origin (font, cp, &x, &y); |
| hb_font_get_glyph_v_origin (font, cp, &x, &y); |
| hb_font_get_glyph_contour_point (font, cp, 0, &x, &y); |
| char buf[64]; |
| hb_font_get_glyph_name (font, cp, buf, sizeof (buf)); |
| |
| hb_ot_color_palette_get_name_id (face, cp); |
| hb_ot_color_palette_color_get_name_id (face, cp); |
| hb_ot_color_palette_get_flags (face, cp); |
| hb_ot_color_palette_get_colors (face, cp, 0, nullptr, nullptr); |
| hb_ot_color_glyph_get_layers (face, cp, 0, nullptr, nullptr); |
| hb_blob_destroy (hb_ot_color_glyph_reference_svg (face, cp)); |
| hb_blob_destroy (hb_ot_color_glyph_reference_png (font, cp)); |
| |
| hb_ot_layout_get_ligature_carets (font, HB_DIRECTION_LTR, cp, 0, nullptr, nullptr); |
| |
| hb_ot_math_get_glyph_italics_correction (font, cp); |
| hb_ot_math_get_glyph_top_accent_attachment (font, cp); |
| hb_ot_math_is_glyph_extended_shape (face, cp); |
| hb_ot_math_get_glyph_kerning (font, cp, HB_OT_MATH_KERN_BOTTOM_RIGHT, 0); |
| hb_ot_math_get_glyph_variants (font, cp, HB_DIRECTION_TTB, 0, nullptr, nullptr); |
| hb_ot_math_get_glyph_assembly (font, cp, HB_DIRECTION_BTT, 0, nullptr, nullptr, nullptr); |
| } |
| |
| extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size) |
| { |
| alloc_state = _fuzzing_alloc_state (data, size); |
| |
| hb_blob_t *blob = hb_blob_create ((const char *) data, size, |
| HB_MEMORY_MODE_READONLY, nullptr, nullptr); |
| hb_face_t *face = hb_face_create (blob, 0); |
| hb_font_t *font = hb_font_create (face); |
| |
| unsigned num_coords = 0; |
| if (size) num_coords = data[size - 1]; |
| num_coords = hb_ot_var_get_axis_count (face) > num_coords ? num_coords : hb_ot_var_get_axis_count (face); |
| int *coords = (int *) calloc (num_coords, sizeof (int)); |
| if (size > num_coords + 1) |
| for (unsigned i = 0; i < num_coords; ++i) |
| coords[i] = ((int) data[size - num_coords + i - 1] - 128) * 10; |
| hb_font_set_var_coords_normalized (font, coords, num_coords); |
| free (coords); |
| |
| unsigned glyph_count = hb_face_get_glyph_count (face); |
| glyph_count = glyph_count > 16 ? 16 : glyph_count; |
| |
| _draw_data_t draw_data = {0, 0, 0, 0, 0}; |
| |
| hb_draw_funcs_t *funcs = hb_draw_funcs_create (); |
| hb_draw_funcs_set_move_to_func (funcs, (hb_draw_move_to_func_t) _move_to, nullptr, nullptr); |
| hb_draw_funcs_set_line_to_func (funcs, (hb_draw_line_to_func_t) _line_to, nullptr, nullptr); |
| hb_draw_funcs_set_quadratic_to_func (funcs, (hb_draw_quadratic_to_func_t) _quadratic_to, nullptr, nullptr); |
| hb_draw_funcs_set_cubic_to_func (funcs, (hb_draw_cubic_to_func_t) _cubic_to, nullptr, nullptr); |
| hb_draw_funcs_set_close_path_func (funcs, (hb_draw_close_path_func_t) _close_path, nullptr, nullptr); |
| volatile unsigned counter = !glyph_count; |
| hb_set_t *set = hb_set_create (); |
| for (unsigned gid = 0; gid < glyph_count; ++gid) |
| { |
| hb_font_get_glyph_shape (font, gid, funcs, &draw_data); |
| |
| /* Glyph extents also may practices the similar path, call it now that is related */ |
| hb_glyph_extents_t extents; |
| if (hb_font_get_glyph_extents (font, gid, &extents)) |
| counter += !!extents.width + !!extents.height + !!extents.x_bearing + !!extents.y_bearing; |
| |
| if (!counter) counter += 1; |
| |
| /* other misc calls */ |
| misc_calls_for_gid (face, font, set, gid); |
| } |
| hb_set_destroy (set); |
| assert (counter); |
| hb_draw_funcs_destroy (funcs); |
| |
| hb_font_destroy (font); |
| hb_face_destroy (face); |
| hb_blob_destroy (blob); |
| return 0; |
| } |