Remove unused BMP compressing code

Change-Id: I64e32fc9226f57e1c9adff7809fabc6cd56e7a8f
Reviewed-on: https://pdfium-review.googlesource.com/6611
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>

2 files changed, 0 insertions, 331 deletions

diff --git a/core/fxcodec/lbmp/fx_bmp.cpp b/core/fxcodec/lbmp/fx_bmp.cpp
index f785505d22..1febce63eb 100644
--- a/core/fxcodec/lbmp/fx_bmp.cpp
+++ b/core/fxcodec/lbmp/fx_bmp.cpp
@@ -19,13 +19,6 @@ uint32_t GetDWord_LSBFirst(uint8_t* p) {
   return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
 }
 
-void SetDWord_LSBFirst(uint8_t* p, uint32_t v) {
-  p[0] = (uint8_t)v;
-  p[1] = (uint8_t)(v >> 8);
-  p[2] = (uint8_t)(v >> 16);
-  p[3] = (uint8_t)(v >> 24);
-}
-
 uint8_t HalfRoundUp(uint8_t value) {
   uint16_t value16 = value;
   return static_cast<uint8_t>((value16 + 1) / 2);
@@ -37,11 +30,6 @@ uint16_t GetWord_LSBFirst(uint8_t* p) {
   return p[0] | (p[1] << 8);
 }
 
-void SetWord_LSBFirst(uint8_t* p, uint16_t v) {
-  p[0] = (uint8_t)v;
-  p[1] = (uint8_t)(v >> 8);
-}
-
 BMPDecompressor* bmp_create_decompress() {
   BMPDecompressor* bmp_ptr = FX_Alloc(BMPDecompressor, 1);
   memset(bmp_ptr, 0, sizeof(BMPDecompressor));
@@ -668,298 +656,3 @@ uint32_t BMPDecompressor::GetAvailInput(uint8_t** avail_buf) {
   }
   return avail_in;
 }
-
-bmp_compress_struct_p bmp_create_compress() {
-  bmp_compress_struct_p bmp_ptr;
-  bmp_ptr = FX_Alloc(bmp_compress_struct, 1);
-  if (bmp_ptr) {
-    memset(bmp_ptr, 0, sizeof(bmp_compress_struct));
-  }
-  return bmp_ptr;
-}
-void bmp_destroy_compress(bmp_compress_struct_p bmp_ptr) {
-  if (bmp_ptr) {
-    if (bmp_ptr->src_free && bmp_ptr->src_buf) {
-      FX_Free(bmp_ptr->src_buf);
-    }
-    FX_Free(bmp_ptr);
-  }
-}
-static void WriteFileHeader(BmpFileHeaderPtr head_ptr, uint8_t* dst_buf) {
-  uint32_t offset;
-  offset = 0;
-  SetWord_LSBFirst(&dst_buf[offset], head_ptr->bfType);
-  offset += 2;
-  SetDWord_LSBFirst(&dst_buf[offset], head_ptr->bfSize);
-  offset += 4;
-  SetWord_LSBFirst(&dst_buf[offset], head_ptr->bfReserved1);
-  offset += 2;
-  SetWord_LSBFirst(&dst_buf[offset], head_ptr->bfReserved2);
-  offset += 2;
-  SetDWord_LSBFirst(&dst_buf[offset], head_ptr->bfOffBits);
-  offset += 4;
-}
-static void WriteInfoHeader(BmpInfoHeaderPtr info_head_ptr, uint8_t* dst_buf) {
-  uint32_t offset;
-  offset = sizeof(BmpFileHeader);
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biSize);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biWidth);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biHeight);
-  offset += 4;
-  SetWord_LSBFirst(&dst_buf[offset], info_head_ptr->biPlanes);
-  offset += 2;
-  SetWord_LSBFirst(&dst_buf[offset], info_head_ptr->biBitCount);
-  offset += 2;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biCompression);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biSizeImage);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biXPelsPerMeter);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biYPelsPerMeter);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biClrUsed);
-  offset += 4;
-  SetDWord_LSBFirst(&dst_buf[offset], info_head_ptr->biClrImportant);
-  offset += 4;
-}
-static void bmp_encode_bitfields(bmp_compress_struct_p bmp_ptr,
-                                 uint8_t*& dst_buf,
-                                 uint32_t& dst_size) {
-  if (bmp_ptr->info_header.biBitCount != 16 &&
-      bmp_ptr->info_header.biBitCount != 32) {
-    return;
-  }
-  uint32_t size, dst_pos, i;
-  size = bmp_ptr->src_pitch * bmp_ptr->src_row *
-         bmp_ptr->info_header.biBitCount / 16;
-  dst_pos = bmp_ptr->file_header.bfOffBits;
-  dst_size += size;
-  dst_buf = FX_Realloc(uint8_t, dst_buf, dst_size);
-  memset(&dst_buf[dst_pos], 0, size);
-  uint32_t mask_red;
-  uint32_t mask_green;
-  uint32_t mask_blue;
-  mask_red = 0x7C00;
-  mask_green = 0x03E0;
-  mask_blue = 0x001F;
-  if (bmp_ptr->info_header.biCompression == BMP_BITFIELDS) {
-    if (bmp_ptr->bit_type == BMP_BIT_565) {
-      mask_red = 0xF800;
-      mask_green = 0x07E0;
-      mask_blue = 0x001F;
-    }
-    if (bmp_ptr->info_header.biBitCount == 32) {
-      mask_red = 0xFF0000;
-      mask_green = 0x00FF00;
-      mask_blue = 0x0000FF;
-    }
-    SetDWord_LSBFirst(&dst_buf[dst_pos], mask_red);
-    dst_pos += 4;
-    SetDWord_LSBFirst(&dst_buf[dst_pos], mask_green);
-    dst_pos += 4;
-    SetDWord_LSBFirst(&dst_buf[dst_pos], mask_blue);
-    dst_pos += 4;
-    bmp_ptr->file_header.bfOffBits = dst_pos;
-  }
-  uint8_t blue_bits = 0;
-  uint8_t green_bits = 0;
-  uint8_t red_bits = 0;
-  for (i = 0; i < bmp_ptr->info_header.biBitCount; i++) {
-    if ((mask_blue >> i) & 0x01) {
-      blue_bits++;
-    }
-    if ((mask_green >> i) & 0x01) {
-      green_bits++;
-    }
-    if ((mask_red >> i) & 0x01) {
-      red_bits++;
-    }
-  }
-  green_bits += blue_bits;
-  red_bits += green_bits;
-  blue_bits = 8 - blue_bits;
-  green_bits -= 8;
-  red_bits -= 8;
-  i = 0;
-  for (int32_t row_num = bmp_ptr->src_row - 1; row_num > -1; row_num--, i = 0) {
-    while (i < bmp_ptr->src_width * bmp_ptr->src_bpp / 8) {
-      uint8_t b = bmp_ptr->src_buf[row_num * bmp_ptr->src_pitch + i++];
-      uint8_t g = bmp_ptr->src_buf[row_num * bmp_ptr->src_pitch + i++];
-      uint8_t r = bmp_ptr->src_buf[row_num * bmp_ptr->src_pitch + i++];
-      if (bmp_ptr->src_bpp == 32) {
-        i++;
-      }
-      uint32_t pix_val = 0;
-      pix_val |= (b >> blue_bits) & mask_blue;
-      pix_val |= (g << green_bits) & mask_green;
-      pix_val |= (r << red_bits) & mask_red;
-      if (bmp_ptr->info_header.biBitCount == 16) {
-        SetWord_LSBFirst(&dst_buf[dst_pos], pix_val);
-        dst_pos += 2;
-      } else {
-        SetDWord_LSBFirst(&dst_buf[dst_pos], pix_val);
-        dst_pos += 4;
-      }
-    }
-  }
-  dst_size = dst_pos;
-}
-
-static void bmp_encode_rgb(bmp_compress_struct_p bmp_ptr,
-                           uint8_t*& dst_buf,
-                           uint32_t& dst_size) {
-  if (bmp_ptr->info_header.biBitCount == 16) {
-    bmp_encode_bitfields(bmp_ptr, dst_buf, dst_size);
-    return;
-  }
-  uint32_t size, dst_pos;
-  uint32_t dst_pitch =
-      (bmp_ptr->src_width * bmp_ptr->info_header.biBitCount + 31) / 32 * 4;
-  size = dst_pitch * bmp_ptr->src_row;
-  dst_pos = bmp_ptr->file_header.bfOffBits;
-  dst_size += size;
-  dst_buf = FX_Realloc(uint8_t, dst_buf, dst_size);
-  memset(&dst_buf[dst_pos], 0, size);
-  for (int32_t row_num = bmp_ptr->src_row - 1; row_num > -1; row_num--) {
-    memcpy(&dst_buf[dst_pos], &bmp_ptr->src_buf[row_num * bmp_ptr->src_pitch],
-           bmp_ptr->src_pitch);
-    dst_pos += dst_pitch;
-  }
-  dst_size = dst_pos;
-}
-static uint8_t bmp_rle8_search(const uint8_t* buf, int32_t len) {
-  uint8_t num;
-  num = 1;
-  while (num < len) {
-    if (buf[num - 1] != buf[num] || num == 0xFF) {
-      break;
-    }
-    num++;
-  }
-  return num;
-}
-static void bmp_encode_rle8(bmp_compress_struct_p bmp_ptr,
-                            uint8_t*& dst_buf,
-                            uint32_t& dst_size) {
-  uint32_t size, dst_pos, index;
-  uint8_t rle[2] = {0};
-  size = bmp_ptr->src_pitch * bmp_ptr->src_row * 2;
-  dst_pos = bmp_ptr->file_header.bfOffBits;
-  dst_size += size;
-  dst_buf = FX_Realloc(uint8_t, dst_buf, dst_size);
-  memset(&dst_buf[dst_pos], 0, size);
-  for (int32_t row_num = bmp_ptr->src_row - 1, i = 0; row_num > -1;) {
-    index = row_num * bmp_ptr->src_pitch;
-    rle[0] = bmp_rle8_search(&bmp_ptr->src_buf[index + i], size - index - i);
-    rle[1] = bmp_ptr->src_buf[index + i];
-    if (i + rle[0] >= (int32_t)bmp_ptr->src_pitch) {
-      rle[0] = uint8_t(bmp_ptr->src_pitch - i);
-      if (rle[0]) {
-        dst_buf[dst_pos++] = rle[0];
-        dst_buf[dst_pos++] = rle[1];
-      }
-      dst_buf[dst_pos++] = RLE_MARKER;
-      dst_buf[dst_pos++] = RLE_EOL;
-      i = 0;
-      row_num--;
-    } else {
-      i += rle[0];
-      dst_buf[dst_pos++] = rle[0];
-      dst_buf[dst_pos++] = rle[1];
-    }
-  }
-  dst_buf[dst_pos++] = RLE_MARKER;
-  dst_buf[dst_pos++] = RLE_EOI;
-  dst_size = dst_pos;
-}
-static uint8_t bmp_rle4_search(const uint8_t* buf, int32_t len) {
-  uint8_t num;
-  num = 2;
-  while (num < len) {
-    if (buf[num - 2] != buf[num] || num == 0xFF) {
-      break;
-    }
-    num++;
-  }
-  return num;
-}
-static void bmp_encode_rle4(bmp_compress_struct_p bmp_ptr,
-                            uint8_t*& dst_buf,
-                            uint32_t& dst_size) {
-  uint32_t size, dst_pos, index;
-  uint8_t rle[2] = {0};
-  size = bmp_ptr->src_pitch * bmp_ptr->src_row;
-  dst_pos = bmp_ptr->file_header.bfOffBits;
-  dst_size += size;
-  dst_buf = FX_Realloc(uint8_t, dst_buf, dst_size);
-  memset(&dst_buf[dst_pos], 0, size);
-  for (int32_t row_num = bmp_ptr->src_row - 1, i = 0; row_num > -1;
-       rle[1] = 0) {
-    index = row_num * bmp_ptr->src_pitch;
-    rle[0] = bmp_rle4_search(&bmp_ptr->src_buf[index + i], size - index - i);
-    rle[1] |= (bmp_ptr->src_buf[index + i] & 0x0f) << 4;
-    rle[1] |= bmp_ptr->src_buf[index + i + 1] & 0x0f;
-    if (i + rle[0] >= (int32_t)bmp_ptr->src_pitch) {
-      rle[0] = uint8_t(bmp_ptr->src_pitch - i);
-      if (rle[0]) {
-        dst_buf[dst_pos++] = rle[0];
-        dst_buf[dst_pos++] = rle[1];
-      }
-      dst_buf[dst_pos++] = RLE_MARKER;
-      dst_buf[dst_pos++] = RLE_EOL;
-      i = 0;
-      row_num--;
-    } else {
-      i += rle[0];
-      dst_buf[dst_pos++] = rle[0];
-      dst_buf[dst_pos++] = rle[1];
-    }
-  }
-  dst_buf[dst_pos++] = RLE_MARKER;
-  dst_buf[dst_pos++] = RLE_EOI;
-  dst_size = dst_pos;
-}
-bool bmp_encode_image(bmp_compress_struct_p bmp_ptr,
-                      uint8_t*& dst_buf,
-                      uint32_t& dst_size) {
-  uint32_t head_size = sizeof(BmpFileHeader) + sizeof(BmpInfoHeader);
-  uint32_t pal_size = sizeof(uint32_t) * bmp_ptr->pal_num;
-  if (bmp_ptr->info_header.biClrUsed > 0 &&
-      bmp_ptr->info_header.biClrUsed < bmp_ptr->pal_num) {
-    pal_size = sizeof(uint32_t) * bmp_ptr->info_header.biClrUsed;
-  }
-  dst_size = head_size + sizeof(uint32_t) * bmp_ptr->pal_num;
-  dst_buf = FX_TryAlloc(uint8_t, dst_size);
-  if (!dst_buf)
-    return false;
-
-  memset(dst_buf, 0, dst_size);
-  bmp_ptr->file_header.bfOffBits = head_size;
-  if (bmp_ptr->pal_ptr && pal_size) {
-    memcpy(&dst_buf[head_size], bmp_ptr->pal_ptr, pal_size);
-    bmp_ptr->file_header.bfOffBits += pal_size;
-  }
-  WriteInfoHeader(&bmp_ptr->info_header, dst_buf);
-  switch (bmp_ptr->info_header.biCompression) {
-    case BMP_RGB:
-      bmp_encode_rgb(bmp_ptr, dst_buf, dst_size);
-      break;
-    case BMP_BITFIELDS:
-      bmp_encode_bitfields(bmp_ptr, dst_buf, dst_size);
-      break;
-    case BMP_RLE8:
-      bmp_encode_rle8(bmp_ptr, dst_buf, dst_size);
-      break;
-    case BMP_RLE4:
-      bmp_encode_rle4(bmp_ptr, dst_buf, dst_size);
-      break;
-    default:
-      break;
-  }
-  bmp_ptr->file_header.bfSize = dst_size;
-  WriteFileHeader(&bmp_ptr->file_header, dst_buf);
-  return true;
-}
diff --git a/core/fxcodec/lbmp/fx_bmp.h b/core/fxcodec/lbmp/fx_bmp.h
index b16aecb02b..2612d7eb8c 100644
--- a/core/fxcodec/lbmp/fx_bmp.h
+++ b/core/fxcodec/lbmp/fx_bmp.h
@@ -138,30 +138,6 @@ class CBmpContext : public CCodec_BmpModule::Context {
   char m_szLastError[256];
 };
 
-typedef struct tag_bmp_compress_struct bmp_compress_struct;
-typedef bmp_compress_struct* bmp_compress_struct_p;
-typedef bmp_compress_struct_p* bmp_compress_struct_pp;
-struct tag_bmp_compress_struct {
-  BmpFileHeader file_header;
-  BmpInfoHeader info_header;
-  uint8_t* src_buf;
-  uint32_t src_pitch;
-  uint32_t src_row;
-  uint8_t src_bpp;
-  uint32_t src_width;
-  bool src_free;
-  uint32_t* pal_ptr;
-  uint16_t pal_num;
-  uint8_t bit_type;
-};
-
-bmp_compress_struct_p bmp_create_compress();
-void bmp_destroy_compress(bmp_compress_struct_p bmp_ptr);
-bool bmp_encode_image(bmp_compress_struct_p bmp_ptr,
-                      uint8_t*& dst_buf,
-                      uint32_t& dst_size);
-
 uint16_t GetWord_LSBFirst(uint8_t* p);
-void SetWord_LSBFirst(uint8_t* p, uint16_t v);
 
 #endif  // CORE_FXCODEC_LBMP_FX_BMP_H_