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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / cat3 / SCGetScanSize.z / SCGetScanSize
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Text File  |  1998-10-30  |  3.4 KB  |  67 lines
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  4. SSSSCCCCGGGGeeeettttSSSSccccaaaannnnSSSSiiiizzzzeeee((((3333))))                 IIIImmmmpppprrrreeeessssssssaaaarrrriiiioooo                  SSSSCCCCGGGGeeeettttSSSSccccaaaannnnSSSSiiiizzzzeeee((((3333))))
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  8. NNNNAAAAMMMMEEEE
  9.      SCGetScanSize - Determine the amount of image data to be scanned
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  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      ####iiiinnnncccclllluuuuddddeeee <<<<ssssttttddddiiiioooo....hhhh>>>>
  13.      ####iiiinnnncccclllluuuuddddeeee <<<<ssssccccaaaannnnnnnneeeerrrr....hhhh>>>>
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  15.      iiiinnnntttt SSSSCCCCGGGGeeeettttSSSSccccaaaannnnSSSSiiiizzzzeeee((((SSSSCCCCAAAANNNNNNNNEEEERRRR ****ssss,,,, lllloooonnnngggg ****wwwwiiiiddddtttthhhh,,,, lllloooonnnngggg ****hhhheeeeiiiigggghhhhtttt,,,,
  16.                        lllloooonnnngggg ****bbbbyyyytttteeeessssPPPPeeeerrrrLLLLiiiinnnneeee))));;;;
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  18. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  19.      _S_C_G_e_t_S_c_a_n_S_i_z_e is called after calling _S_C_S_e_t_u_p(3) to determine how much
  20.      image data to retrieve from the scanner.  *_w_i_d_t_h gets filled in with the
  21.      number of pixels in each row, *_h_e_i_g_h_t gets filled in with the number of
  22.      rows in the image, and *_b_y_t_e_s_P_e_r_L_i_n_e gets filled in with the number of
  23.      bytes in each row.
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  25.      If the data type being scanned has a _p_a_c_k_i_n_g of SSSSCCCC____PPPPLLLLAAAANNNNAAAARRRR, then the total
  26.      number of bytes to be scanned is given by the number of channels *
  27.      *_h_e_i_g_h_t * *_b_y_t_e_s_P_e_r_L_i_n_e.  Otherwise, the total number of bytes is simply
  28.      *_h_e_i_g_h_t * *_b_y_t_e_s_P_e_r_L_i_n_e.  See _S_C_S_e_t_u_p(3) and _S_C_G_e_t_D_a_t_a_T_y_p_e_s(3) for more
  29.      information about data types.
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  31.      After calling _S_C_G_e_t_S_c_a_n_S_i_z_e, a scanning application should allocate
  32.      buffers and write image file headers as appropriate, and then call
  33.      _S_C_S_c_a_n(3) or _S_C_S_c_a_n_F_D(3) to start the actual scan.
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  35. RRRREEEETTTTUUUURRRRNNNN VVVVAAAALLLLUUUUEEEE
  36.      _S_C_G_e_t_S_c_a_n_S_i_z_e returns 0 if successful.  If an error occurs, -1 is
  37.      returned and _S_C_e_r_r_n_o is set to indicate the reason for failure.
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  39. EEEEXXXXEEEECCCCUUUUTTTTIIIIOOOONNNN EEEERRRRRRRROOOORRRR CCCCOOOODDDDEEEESSSS
  40.      _S_C_G_e_t_S_c_a_n_S_i_z_e will fail under the following circumstances.
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  42.      SCECOMM                  Error communicating with scanner driver
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  44.      SCEDEV                   Scanner driver error
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  46. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  47.      _l_i_b_s_c_a_n(3), _S_C_S_e_t_u_p(3), _S_C_S_c_a_n(3), _S_C_S_c_a_n_F_D(3).
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  63.                                                                         PPPPaaaaggggeeee 1111
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