Coverage Report

Created: 2024-08-19 11:27

/home/liu/actions-runner/_work/ccv/ccv/lib/io/_ccv_io_bmp.inc
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Source (jump to first uncovered line)
1
static void _ccv_read_bmp_fd(FILE* in, ccv_dense_matrix_t** x, int type)
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{
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  fseek(in, 10, SEEK_SET);
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  int offset;
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  (void) fread(&offset, 4, 1, in);
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  int size;
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  (void) fread(&size, 4, 1, in);
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  int width = 0, height = 0, bpp = 0, rle_code = 0, clrused = 0;
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  if (size >= 36)
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  {
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    (void) fread(&width, 4, 1, in);
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    (void) fread(&height, 4, 1, in);
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    (void) fread(&bpp, 4, 1, in);
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    bpp = bpp >> 16;
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    (void) fread(&rle_code, 4, 1, in);
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    fseek(in, 12, SEEK_CUR);
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    (void) fread(&clrused, 4, 1, in);
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    fseek(in, size - 36, SEEK_CUR);
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    /* only support 24-bit bmp */
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  } else if (size == 12) {
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    (void) fread(&width, 4, 1, in);
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    (void) fread(&height, 4, 1, in);
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    (void) fread(&bpp, 4, 1, in);
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    bpp = bpp >> 16;
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    /* TODO: not finished */
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  }
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  if (width == 0 || height == 0 || bpp == 0)
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    return;
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  ccv_dense_matrix_t* im = *x;
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  if (im == 0)
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    *x = im = ccv_dense_matrix_new(height, width, (type) ? type : CCV_8U | ((bpp > 8) ? CCV_C3 : CCV_C1), 0, 0);
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  fseek(in, offset, SEEK_SET);
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  int i, j;
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  unsigned char* ptr = im->data.u8 + (im->rows - 1) * im->step;
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  if ((bpp == 8 && CCV_GET_CHANNEL(im->type) == CCV_C1) || (bpp == 24 && CCV_GET_CHANNEL(im->type) == CCV_C3))
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  {
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    if (CCV_GET_CHANNEL(im->type) == CCV_C1)
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    {
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      for (i = 0; i < im->rows; i++)
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      {
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        (void) fread(ptr, 1, im->step, in);
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        ptr -= im->step;
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      }
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    } else {
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      for (i = 0; i < im->rows; i++)
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      {
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        (void) fread(ptr, 1, im->step, in);
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        for (j = 0; j < im->cols * 3; j += 3)
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        {
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          unsigned char t = ptr[j];
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          ptr[j] = ptr[j + 2];
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          ptr[j + 2] = t;
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        }
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        ptr -= im->step;
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      }
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    }
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  } else {
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    if (bpp == 24 && CCV_GET_CHANNEL(im->type) == CCV_C1)
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    {
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      int bufstep = (im->cols * 3 + 3) & -4;
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      unsigned char* buffer = (unsigned char*)alloca(bufstep);
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      for (i = 0; i < im->rows; i++)
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      {
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        (void) fread(buffer, 1, bufstep, in);
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        unsigned char* rgb = buffer;
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        unsigned char* g = ptr;
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        for(j = 0; j < im->cols; j++, rgb += 3, g++)
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          *g = (unsigned char)((rgb[2] * 6969 + rgb[1] * 23434 + rgb[0] * 2365) >> 15);
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        ptr -= im->step;
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      }
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    } else if (bpp == 8 && CCV_GET_CHANNEL(im->type) == CCV_C3) {
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      int bufstep = (im->cols + 3) & -4;
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      unsigned char* buffer = (unsigned char*)alloca(bufstep);
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      for (i = 0; i < im->rows; i++)
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      {
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        (void) fread(buffer, 1, bufstep, in);
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        unsigned char* g = buffer;
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        unsigned char* rgb = ptr;
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        for(j = 0; j < im->cols; j++, rgb += 3, g++)
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          rgb[2] = rgb[1] = rgb[0] = *g;
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        ptr -= im->step;
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      }
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    }
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  }
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}