Revert of Updating OTS repo from https://github.com/khaledhosny/ots.git

third_party/ots/test/side-by-side.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <fcntl.h>
-#include <ft2build.h>
-#include FT_FREETYPE_H
-#include FT_OUTLINE_H
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-
-#include "opentype-sanitiser.h"
-#include "ots-memory-stream.h"
-
-namespace {
-
-void DumpBitmap(const FT_Bitmap *bitmap) {
-  for (int i = 0; i < bitmap->rows * bitmap->width; ++i) {
-    if (bitmap->buffer[i] > 192) {
-      std::fprintf(stderr, "#");
-    } else if (bitmap->buffer[i] > 128) {
-      std::fprintf(stderr, "*");
-    } else if (bitmap->buffer[i] > 64) {
-      std::fprintf(stderr, "+");
-    } else if (bitmap->buffer[i] > 32) {
-      std::fprintf(stderr, ".");
-    } else {
-      std::fprintf(stderr, " ");
-    }
-
-    if ((i + 1) % bitmap->width == 0) {
-      std::fprintf(stderr, "\n");
-    }
-  }
-}
-
-int CompareBitmaps(const FT_Bitmap *orig, const FT_Bitmap *trans) {
-  int ret = 0;
-
-  if (orig->width == trans->width &&
-      orig->rows == trans->rows) {
-    for (int i = 0; i < orig->rows * orig->width; ++i) {
-      if (orig->buffer[i] != trans->buffer[i]) {
-        std::fprintf(stderr, "bitmap data doesn't match!\n");
-        ret = 1;
-        break;
-      }
-    }
-  } else {
-    std::fprintf(stderr, "bitmap metrics doesn't match! (%d, %d), (%d, %d)\n",
-                 orig->width, orig->rows, trans->width, trans->rows);
-    ret = 1;
-  }
-
-  if (ret) {
-    std::fprintf(stderr, "EXPECTED:\n");
-    DumpBitmap(orig);
-    std::fprintf(stderr, "\nACTUAL:\n");
-    DumpBitmap(trans);
-    std::fprintf(stderr, "\n\n");
-  }
-
-  delete[] orig->buffer;
-  delete[] trans->buffer;
-  return ret;
-}
-
-int GetBitmap(FT_Library library, FT_Outline *outline, FT_Bitmap *bitmap) {
-  FT_BBox bbox;
-  FT_Outline_Get_CBox(outline, &bbox);
-
-  bbox.xMin &= ~63;
-  bbox.yMin &= ~63;
-  bbox.xMax = (bbox.xMax + 63) & ~63;
-  bbox.yMax = (bbox.yMax + 63) & ~63;
-  FT_Outline_Translate(outline, -bbox.xMin, -bbox.yMin);
-
-  const int w = (bbox.xMax - bbox.xMin) >> 6;
-  const int h = (bbox.yMax - bbox.yMin) >> 6;
-
-  if (w == 0 || h == 0) {
-    return -1;  // white space
-  }
-  if (w < 0 || h < 0) {
-    std::fprintf(stderr, "bad width/height\n");
-    return 1;  // error
-  }
-
-  uint8_t *buf = new uint8_t[w * h];
-  std::memset(buf, 0x0, w * h);
-
-  bitmap->width = w;
-  bitmap->rows = h;
-  bitmap->pitch = w;
-  bitmap->buffer = buf;
-  bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
-  bitmap->num_grays = 256;
-  if (FT_Outline_Get_Bitmap(library, outline, bitmap)) {
-    std::fprintf(stderr, "can't get outline\n");
-    delete[] buf;
-    return 1;  // error.
-  }
-
-  return 0;
-}
-
-int LoadChar(FT_Face face, bool use_bitmap, int pt, FT_ULong c) {
-  static const int kDpi = 72;
-
-  FT_Matrix matrix;
-  matrix.xx = matrix.yy = 1 << 16;
-  matrix.xy = matrix.yx = 0 << 16;
-
-  FT_Int32 flags = FT_LOAD_DEFAULT | FT_LOAD_TARGET_NORMAL;
-  if (!use_bitmap) {
-    // Since the transcoder drops embedded bitmaps from the transcoded one,
-    // we have to use FT_LOAD_NO_BITMAP flag for the original face.
-    flags |= FT_LOAD_NO_BITMAP;
-  }
-
-  FT_Error error = FT_Set_Char_Size(face, pt * (1 << 6), 0, kDpi, 0);
-  if (error) {
-    std::fprintf(stderr, "Failed to set the char size!\n");
-    return 1;
-  }
-
-  FT_Set_Transform(face, &matrix, 0);
-
-  error = FT_Load_Char(face, c, flags);
-  if (error) return -1;  // no such glyf in the font.
-
-  if (face->glyph->format != FT_GLYPH_FORMAT_OUTLINE) {
-    std::fprintf(stderr, "bad format\n");
-    return 1;
-  }
-
-  return 0;
-}
-
-int LoadCharThenCompare(FT_Library library,
-                        FT_Face orig_face, FT_Face trans_face,
-                        int pt, FT_ULong c) {
-  FT_Bitmap orig_bitmap, trans_bitmap;
-
-  // Load original bitmap.
-  int ret = LoadChar(orig_face, false, pt, c);
-  if (ret) return ret;  // 1: error, -1: no such glyph
-
-  FT_Outline *outline = &orig_face->glyph->outline;
-  ret = GetBitmap(library, outline, &orig_bitmap);
-  if (ret) return ret;  // white space?
-
-  // Load transformed bitmap.
-  ret = LoadChar(trans_face, true, pt, c);
-  if (ret == -1) {
-    std::fprintf(stderr, "the glyph is not found on the transcoded font\n");
-  }
-  if (ret) return 1;  // -1 should be treated as error.
-  outline = &trans_face->glyph->outline;
-  ret = GetBitmap(library, outline, &trans_bitmap);
-  if (ret) return ret;  // white space?
-
-  return CompareBitmaps(&orig_bitmap, &trans_bitmap);
-}
-
-int SideBySide(FT_Library library, const char *file_name,
-               uint8_t *orig_font, size_t orig_len,
-               uint8_t *trans_font, size_t trans_len) {
-  FT_Face orig_face;
-  FT_Error error
-      = FT_New_Memory_Face(library, orig_font, orig_len, 0, &orig_face);
-  if (error) {
-    std::fprintf(stderr, "Failed to open the original font: %s!\n", file_name);
-    return 1;
-  }
-
-  FT_Face trans_face;
-  error = FT_New_Memory_Face(library, trans_font, trans_len, 0, &trans_face);
-  if (error) {
-    std::fprintf(stderr, "Failed to open the transcoded font: %s!\n",
-                 file_name);
-    return 1;
-  }
-
-  static const int kPts[] = {100, 20, 18, 16, 12, 10, 8};  // pt
-  static const size_t kPtsLen = sizeof(kPts) / sizeof(kPts[0]);
-
-  static const int kUnicodeRanges[] = {
-    0x0020, 0x007E,  // Basic Latin (ASCII)
-    0x00A1, 0x017F,  // Latin-1
-    0x1100, 0x11FF,  // Hangul
-    0x3040, 0x309F,  // Japanese HIRAGANA letters
-    0x3130, 0x318F,  // Hangul
-    0x4E00, 0x4F00,  // CJK Kanji/Hanja
-    0xAC00, 0xAD00,  // Hangul
-  };
-  static const size_t kUnicodeRangesLen
-      = sizeof(kUnicodeRanges) / sizeof(kUnicodeRanges[0]);
-
-  for (size_t i = 0; i < kPtsLen; ++i) {
-    for (size_t j = 0; j < kUnicodeRangesLen; j += 2) {
-      for (int k = 0; k <= kUnicodeRanges[j + 1] - kUnicodeRanges[j]; ++k) {
-        int ret = LoadCharThenCompare(library, orig_face, trans_face,
-                                      kPts[i],
-                                      kUnicodeRanges[j] + k);
-        if (ret > 0) {
-          std::fprintf(stderr, "Glyph mismatch! (file: %s, U+%04x, %dpt)!\n",
-                       file_name, kUnicodeRanges[j] + k, kPts[i]);
-          return 1;
-        }
-      }
-    }
-  }
-
-  return 0;
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  if (argc != 2) {
-    std::fprintf(stderr, "Usage: %s ttf_or_otf_filename\n", argv[0]);
-    return 1;
-  }
-
-  // load the font to memory.
-  const int fd = ::open(argv[1], O_RDONLY);
-  if (fd < 0) {
-    ::perror("open");
-    return 1;
-  }
-
-  struct stat st;
-  ::fstat(fd, &st);
-  const off_t orig_len = st.st_size;
-
-  uint8_t *orig_font = new uint8_t[orig_len];
-  if (::read(fd, orig_font, orig_len) != orig_len) {
-    std::fprintf(stderr, "Failed to read file!\n");
-    return 1;
-  }
-  ::close(fd);
-
-  // check if FreeType2 can open the original font.
-  FT_Library library;
-  FT_Error error = FT_Init_FreeType(&library);
-  if (error) {
-    std::fprintf(stderr, "Failed to initialize FreeType2!\n");
-    return 1;
-  }
-  FT_Face dummy;
-  error = FT_New_Memory_Face(library, orig_font, orig_len, 0, &dummy);
-  if (error) {
-    std::fprintf(stderr, "Failed to open the original font with FT2! %s\n",
-                 argv[1]);
-    return 1;
-  }
-
-  // transcode the original font.
-  static const size_t kPadLen = 20 * 1024;
-  uint8_t *trans_font = new uint8_t[orig_len + kPadLen];
-  ots::MemoryStream output(trans_font, orig_len + kPadLen);
-  ots::OTSContext context;
-
-  bool result = context.Process(&output, orig_font, orig_len);
-  if (!result) {
-    std::fprintf(stderr, "Failed to sanitise file! %s\n", argv[1]);
-    return 1;
-  }
-  const size_t trans_len = output.Tell();
-
-  // perform side-by-side tests.
-  return SideBySide(library, argv[1],
-                    orig_font, orig_len,
-                    trans_font, trans_len);
-}