lqr/lqr_base.h

   1 /* LiquidRescaling Library
   2  * Copyright (C) 2007 Carlo Baldassi (the "Author") <carlobaldassi@gmail.com>.
   3  * All Rights Reserved.
   4  *
   5  * This library implements the algorithm described in the paper
   6  * "Seam Carving for Content-Aware Image Resizing"
   7  * by Shai Avidan and Ariel Shamir
   8  * which can be found at http://www.faculty.idc.ac.il/arik/imret.pdf
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; version 3 dated June, 2007.
  13
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU Lesser General Public License for more details.
  18
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, see <http://www.gnu.org/licenses/>
  21  */
  22
  23
  24 #ifndef __LQR_BASE_H__
  25 #define __LQR_BASE_H__
  26
  27 #define LQR_MAX_NAME_LENGTH (1024)
  28
  29 #define EXPORT __attribute__((visibility("default")))
  30
  31 #define TRY_N_N(assign) if ((assign) == NULL) { return NULL; }
  32 //#define TRY_N_F(assign) if ((assign) == NULL) { return FALSE; }
  33 //#define TRY_F_N(assign) if ((assign) == FALSE) { return NULL; }
  34 //#define TRY_F_F(assign) if ((assign) == FALSE) { return FALSE; }
  35
  36
  37 #if 0
  38 #define __LQR_DEBUG__
  39 #endif
  40
  41 #if 0
  42 #define __LQR_VERBOSE__
  43 #endif
  44
  45 /**** RETURN VALUES (signals) ****/
  46 enum _LqrRetVal
  47 {
  48   LQR_ERROR,            /* generic error */
  49   LQR_OK,               /* ok */
  50   LQR_NOMEM,            /* not enough memory */
  51   LQR_WARNING           /* generic warning */
  52 };
  53
  54 typedef enum _LqrRetVal LqrRetVal;
  55
  56 /* generic signal processing macros */
  57 #define CATCH(expr) G_STMT_START { \
  58   LqrRetVal ret_val; \
  59   if ((ret_val = (expr)) != LQR_OK) \
  60     { \
  61       return ret_val; \
  62     } \
  63 } G_STMT_END
  64
  65 /* convert a NULL assignment to an error signal */
  66 #define CATCH_MEM(expr) G_STMT_START { \
  67   if ((expr) == NULL) \
  68     { \
  69       return LQR_NOMEM; \
  70     } \
  71 } G_STMT_END
  72
  73 /* convert a boolean value to an error signal */
  74 #define CATCH_F(expr) G_STMT_START { \
  75   if ((expr) == FALSE) \
  76     { \
  77       return LQR_ERROR; \
  78     } \
  79 } G_STMT_END
  80
  81
  82
  83 /**** RESIZE ORDER ****/
  84 enum _LqrResizeOrder
  85 {
  86   LQR_RES_ORDER_HOR,
  87   LQR_RES_ORDER_VERT
  88 };
  89
  90 typedef enum _LqrResizeOrder LqrResizeOrder;
  91
  92 /**** CLASSES DECLARATIONS ****/
  93
  94 struct _LqrCarver;              /* the multisize image carver */
  95
  96 typedef struct _LqrCarver LqrCarver;
  97
  98 #endif /* __LQR_BASE_H__ */