libs/gfx/GP_VLine.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2010 Jiri "BlueBear" Dluhos                            *
  20  *                         <jiri.bluebear.dluhos@gmail.com>                  *
  21  *                                                                           *
  22  * Copyright (C) 2009-2010 Cyril Hrubis <metan@ucw.cz>                       *
  23  *                                                                           *
  24  *****************************************************************************/
  25
  26 #include "GP_Gfx.h"
  27 #include "algo/VLine.algo.h"
  28 #include "core/GP_FnPerBpp.h"
  29
  30 /* Generate drawing functions for various bit depths. */
  31 DEF_VLINE_FN(GP_VLine1bpp,  GP_Context *, GP_Pixel, GP_PutPixel1bpp)
  32 DEF_VLINE_FN(GP_VLine2bpp,  GP_Context *, GP_Pixel, GP_PutPixel2bpp)
  33 DEF_VLINE_FN(GP_VLine4bpp,  GP_Context *, GP_Pixel, GP_PutPixel4bpp)
  34 DEF_VLINE_FN(GP_VLine8bpp,  GP_Context *, GP_Pixel, GP_PutPixel8bpp)
  35 DEF_VLINE_FN(GP_VLine16bpp, GP_Context *, GP_Pixel, GP_PutPixel16bpp)
  36 DEF_VLINE_FN(GP_VLine24bpp, GP_Context *, GP_Pixel, GP_PutPixel24bpp)
  37 DEF_VLINE_FN(GP_VLine32bpp, GP_Context *, GP_Pixel, GP_PutPixel32bpp)
  38
  39 void GP_VLineXYY(GP_Context *context, int x, int y0, int y1, GP_Pixel pixel)
  40 {
  41         GP_CHECK_CONTEXT(context);
  42
  43         GP_FN_PER_BPP(GP_VLine, context->bpp, context, x, y0, y1, pixel);
  44 }
  45
  46 void GP_VLineXYH(GP_Context *context, int x, int y, unsigned int height,
  47                  GP_Pixel pixel)
  48 {
  49         /* zero height: do not draw anything */
  50         if (height == 0)
  51                 return;
  52
  53         GP_VLineXYY(context, x, y, y + height - 1, pixel);
  54 }
  55
  56 void GP_TVLineXYY(GP_Context *context, int x, int y0, int y1, GP_Pixel pixel)
  57 {
  58         GP_CHECK_CONTEXT(context);
  59
  60         if (context->axes_swap) {
  61                 GP_TRANSFORM_Y(context, x);
  62                 GP_TRANSFORM_X(context, y0);
  63                 GP_TRANSFORM_X(context, y1);
  64                 GP_HLine(context, y0, y1, x, pixel);
  65         } else {
  66                 GP_TRANSFORM_X(context, x);
  67                 GP_TRANSFORM_Y(context, y0);
  68                 GP_TRANSFORM_Y(context, y1);
  69                 GP_VLine(context, x, y0, y1, pixel);
  70         }
  71 }
  72
  73 void GP_TVLineXYH(GP_Context *context, int x, int y, unsigned int height,
  74                   GP_Pixel pixel)
  75 {
  76         /* zero height: do not draw anything */
  77         if (height == 0)
  78                 return;
  79
  80         GP_TVLineXYY(context, x, y, y + height - 1, pixel);
  81 }