Delete SkImageDecoder

This image decoding implementation has been replaced
by SkCodec in Android.

Additionally, we have replaced uses of SkImageDecoder
in Skia and Google3 with uses of SkCodec.

Now we can delete SkImageDecoder :).

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1820503002
CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot,Build-Mac-Clang-x86_64-Release-CMake-Trybot

Committed: https://skia.googlesource.com/skia/+/f799706656f2581c5bf5510d94df3fa17cce1607

Committed: https://skia.googlesource.com/skia/+/5b6e73e0c8282c4d85accbfbcecc6dee84f8a1eb

Review URL: https://codereview.chromium.org/1820503002

1 files changed, 0 insertions, 369 deletions

diff --git a/src/images/bmpdecoderhelper.cpp b/src/images/bmpdecoderhelper.cpp
deleted file mode 100644
index 9171b5d527..0000000000
--- a/src/images/bmpdecoderhelper.cpp
+++ /dev/null
@@ -1,369 +0,0 @@
-
-/*
- * Copyright 2007 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-// Author: cevans@google.com (Chris Evans)
-
-#include "bmpdecoderhelper.h"
-
-namespace image_codec {
-
-static const int kBmpHeaderSize = 14;
-static const int kBmpInfoSize = 40;
-static const int kBmpOS2InfoSize = 12;
-static const int kMaxDim = SHRT_MAX / 2;
-
-bool BmpDecoderHelper::DecodeImage(const char* p,
-                                   size_t len,
-                                   int max_pixels,
-                                   BmpDecoderCallback* callback) {
-  data_ = reinterpret_cast<const uint8*>(p);
-  pos_ = 0;
-  len_ = len;
-  inverted_ = true;
-  // Parse the header structure.
-  if (len < kBmpHeaderSize + 4) {
-    return false;
-  }
-  GetShort();  // Signature.
-  GetInt();  // Size.
-  GetInt();  // Reserved.
-  int offset = GetInt();
-  // Parse the info structure.
-  int infoSize = GetInt();
-  if (infoSize != kBmpOS2InfoSize && infoSize < kBmpInfoSize) {
-    return false;
-  }
-  int cols = 0;
-  int comp = 0;
-  int colLen = 4;
-  if (infoSize >= kBmpInfoSize) {
-    if (len < kBmpHeaderSize + kBmpInfoSize) {
-      return false;
-    }
-    width_ = GetInt();
-    height_ = GetInt();
-    GetShort();  // Planes.
-    bpp_ = GetShort();
-    comp = GetInt();
-    GetInt();  // Size.
-    GetInt();  // XPPM.
-    GetInt();  // YPPM.
-    cols = GetInt();
-    GetInt();  // Important colours.
-  } else {
-    if (len < kBmpHeaderSize + kBmpOS2InfoSize) {
-      return false;
-    }
-    colLen = 3;
-    width_ = GetShort();
-    height_ = GetShort();
-    GetShort();  // Planes.
-    bpp_ = GetShort();
-  }
-  if (height_ < 0) {
-    height_ = -height_;
-    inverted_ = false;
-  }
-  if (width_ <= 0 || width_ > kMaxDim || height_ <= 0 || height_ > kMaxDim) {
-    return false;
-  }
-  if (width_ * height_ > max_pixels) {
-    return false;
-  }
-  if (cols < 0 || cols > 256) {
-    return false;
-  }
-  // Allocate then read in the colour map.
-  if (cols == 0 && bpp_ <= 8) {
-    cols = 1 << bpp_;
-  }
-  if (bpp_ <= 8 || cols > 0) {
-    uint8* colBuf = new uint8[256 * 3];
-    memset(colBuf, '\0', 256 * 3);
-    colTab_.reset(colBuf);
-  }
-  if (cols > 0) {
-    if (pos_ + (cols * colLen) > len_) {
-      return false;
-    }
-    for (int i = 0; i < cols; ++i) {
-      int base = i * 3;
-      colTab_[base + 2] = GetByte();
-      colTab_[base + 1] = GetByte();
-      colTab_[base] = GetByte();
-      if (colLen == 4) {
-        GetByte();
-      }
-    }
-  }
-  // Read in the compression data if necessary.
-  redBits_ = 0x7c00;
-  greenBits_ = 0x03e0;
-  blueBits_ = 0x001f;
-  bool rle = false;
-  if (comp == 1 || comp == 2) {
-    rle = true;
-  } else if (comp == 3) {
-    if (pos_ + 12 > len_) {
-      return false;
-    }
-    redBits_ = GetInt() & 0xffff;
-    greenBits_ = GetInt() & 0xffff;
-    blueBits_ = GetInt() & 0xffff;
-  }
-  redShiftRight_ = CalcShiftRight(redBits_);
-  greenShiftRight_ = CalcShiftRight(greenBits_);
-  blueShiftRight_ = CalcShiftRight(blueBits_);
-  redShiftLeft_ = CalcShiftLeft(redBits_);
-  greenShiftLeft_ = CalcShiftLeft(greenBits_);
-  blueShiftLeft_ = CalcShiftLeft(blueBits_);
-  rowPad_ = 0;
-  pixelPad_ = 0;
-  int rowLen;
-  if (bpp_ == 32) {
-    rowLen = width_ * 4;
-    pixelPad_ = 1;
-  } else if (bpp_ == 24) {
-    rowLen = width_ * 3;
-  } else if (bpp_ == 16) {
-    rowLen = width_ * 2;
-  } else if (bpp_ == 8) {
-    rowLen = width_;
-  } else if (bpp_ == 4) {
-    rowLen = width_ / 2;
-    if (width_ & 1) {
-      rowLen++;
-    }
-  } else if (bpp_ == 1) {
-    rowLen = width_ / 8;
-    if (width_ & 7) {
-      rowLen++;
-    }
-  } else {
-    return false;
-  }
-  // Round the rowLen up to a multiple of 4.
-  if (rowLen % 4 != 0) {
-    rowPad_ = 4 - (rowLen % 4);
-    rowLen += rowPad_;
-  }
-
-  if (offset > 0 && (size_t)offset > pos_ && (size_t)offset < len_) {
-    pos_ = offset;
-  }
-  // Deliberately off-by-one; a load of BMPs seem to have their last byte
-  // missing.
-  if (!rle && (pos_ + (rowLen * height_) > len_ + 1)) {
-    return false;
-  }
-
-  output_ = callback->SetSize(width_, height_);
-  if (nullptr == output_) {
-    return true;  // meaning we succeeded, but they want us to stop now
-  }
-
-  if (rle && (bpp_ == 4 || bpp_ == 8)) {
-    DoRLEDecode();
-  } else {
-    DoStandardDecode();
-  }
-  return true;
-}
-
-void BmpDecoderHelper::DoRLEDecode() {
-  static const uint8 RLE_ESCAPE = 0;
-  static const uint8 RLE_EOL = 0;
-  static const uint8 RLE_EOF = 1;
-  static const uint8 RLE_DELTA = 2;
-  int x = 0;
-  int y = height_ - 1;
-  while (pos_ + 1 < len_) {
-    uint8 cmd = GetByte();
-    if (cmd != RLE_ESCAPE) {
-      uint8 pixels = GetByte();
-      int num = 0;
-      uint8 col = pixels;
-      while (cmd-- && x < width_) {
-        if (bpp_ == 4) {
-          if (num & 1) {
-            col = pixels & 0xf;
-          } else {
-            col = pixels >> 4;
-          }
-        }
-        PutPixel(x++, y, col);
-        num++;
-      }
-    } else {
-      cmd = GetByte();
-      if (cmd == RLE_EOF) {
-        return;
-      } else if (cmd == RLE_EOL) {
-        x = 0;
-        y--;
-        if (y < 0) {
-          return;
-        }
-      } else if (cmd == RLE_DELTA) {
-        if (pos_ + 1 < len_) {
-          uint8 dx = GetByte();
-          uint8 dy = GetByte();
-          x += dx;
-          if (x > width_) {
-            x = width_;
-          }
-          y -= dy;
-          if (y < 0) {
-            return;
-          }
-        }
-      } else {
-        int num = 0;
-        int bytesRead = 0;
-        uint8 val = 0;
-        while (cmd-- && pos_ < len_) {
-          if (bpp_ == 8 || !(num & 1)) {
-            val = GetByte();
-            bytesRead++;
-          }
-          uint8 col = val;
-          if (bpp_ == 4) {
-            if (num & 1) {
-              col = col & 0xf;
-            } else {
-              col >>= 4;
-            }
-          }
-          if (x < width_) {
-            PutPixel(x++, y, col);
-          }
-          num++;
-        }
-        // All pixel runs must be an even number of bytes - skip a byte if we
-        // read an odd number.
-        if ((bytesRead & 1) && pos_ < len_) {
-          GetByte();
-        }
-      }
-    }
-  }
-}
-
-void BmpDecoderHelper::PutPixel(int x, int y, uint8 col) {
-  CHECK(x >= 0 && x < width_);
-  CHECK(y >= 0 && y < height_);
-  if (!inverted_) {
-    y = height_ - (y + 1);
-  }
-
-  int base = ((y * width_) + x) * 3;
-  int colBase = col * 3;
-  output_[base] = colTab_[colBase];
-  output_[base + 1] = colTab_[colBase + 1];
-  output_[base + 2] = colTab_[colBase + 2];
-}
-
-void BmpDecoderHelper::DoStandardDecode() {
-  int row = 0;
-  uint8 currVal = 0;
-  for (int h = height_ - 1; h >= 0; h--, row++) {
-    int realH = h;
-    if (!inverted_) {
-      realH = height_ - (h + 1);
-    }
-    uint8* line = output_ + (3 * width_ * realH);
-    for (int w = 0; w < width_; w++) {
-      if (bpp_ >= 24) {
-        line[2] = GetByte();
-        line[1] = GetByte();
-        line[0] = GetByte();
-      } else if (bpp_ == 16) {
-        uint32 val = GetShort();
-        line[0] = ((val & redBits_) >> redShiftRight_) << redShiftLeft_;
-        line[1] = ((val & greenBits_) >> greenShiftRight_) << greenShiftLeft_;
-        line[2] = ((val & blueBits_) >> blueShiftRight_) << blueShiftLeft_;
-      } else if (bpp_ <= 8) {
-        uint8 col;
-        if (bpp_ == 8) {
-          col = GetByte();
-        } else if (bpp_ == 4) {
-          if ((w % 2) == 0) {
-            currVal = GetByte();
-            col = currVal >> 4;
-          } else {
-            col = currVal & 0xf;
-          }
-        } else {
-          if ((w % 8) == 0) {
-            currVal = GetByte();
-          }
-          int bit = w & 7;
-          col = ((currVal >> (7 - bit)) & 1);
-        }
-        int base = col * 3;
-        line[0] = colTab_[base];
-        line[1] = colTab_[base + 1];
-        line[2] = colTab_[base + 2];
-      }
-      line += 3;
-      for (int i = 0; i < pixelPad_; ++i) {
-        GetByte();
-      }
-    }
-    for (int i = 0; i < rowPad_; ++i) {
-      GetByte();
-    }
-  }
-}
-
-int BmpDecoderHelper::GetInt() {
-  uint8 b1 = GetByte();
-  uint8 b2 = GetByte();
-  uint8 b3 = GetByte();
-  uint8 b4 = GetByte();
-  return b1 | (b2 << 8) | (b3 << 16) | (b4 << 24);
-}
-
-int BmpDecoderHelper::GetShort() {
-  uint8 b1 = GetByte();
-  uint8 b2 = GetByte();
-  return b1 | (b2 << 8);
-}
-
-uint8 BmpDecoderHelper::GetByte() {
-  CHECK(pos_ <= len_);
-  // We deliberately allow this off-by-one access to cater for BMPs with their
-  // last byte missing.
-  if (pos_ == len_) {
-    return 0;
-  }
-  return data_[pos_++];
-}
-
-int BmpDecoderHelper::CalcShiftRight(uint32 mask) {
-  int ret = 0;
-  while (mask != 0 && !(mask & 1)) {
-    mask >>= 1;
-    ret++;
-  }
-  return ret;
-}
-
-int BmpDecoderHelper::CalcShiftLeft(uint32 mask) {
-  int ret = 0;
-  while (mask != 0 && !(mask & 1)) {
-    mask >>= 1;
-  }
-  while (mask != 0 && !(mask & 0x80)) {
-    mask <<= 1;
-    ret++;
-  }
-  return ret;
-}
-
-}  // namespace image_codec