libs/gfx/GP_HLine.gen.c.t

   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) 2009-2011 Jiri "BlueBear" Dluhos                            *
  20  *                         <jiri.bluebear.dluhos@gmail.com>                  *
  21  *                                                                           *
  22  * Copyright (C) 2009-2012 Cyril Hrubis <metan@ucw.cz>                       *
  23  *                                                                           *
  24  *****************************************************************************/
  25
  26 %% extends "base.c.t"
  27
  28 {% block descr %}Horizontal line drawing{% endblock %}
  29
  30 %% block body
  31
  32 #include "core/GP_GetPutPixel.gen.h"
  33 #include "core/GP_WritePixel.h"
  34
  35 #include "gfx/GP_HLine.h"
  36
  37 {# Explicit list of BPP that have optimized write pixel #}
  38 %% set have_writepixels = ['1BPP_LE', '1BPP_BE',
  39                            '2BPP_LE', '2BPP_BE',
  40                            '4BPP_LE', '4BPP_BE',
  41                            '8BPP', '16BPP',
  42                            '24BPP', '32BPP']
  43
  44 %% for ps in pixelsizes
  45
  46 void GP_HLine_Raw_{{ ps.suffix }}(GP_Context *context, int x0, int x1, int y,
  47                                GP_Pixel pixel)
  48 {
  49         /* draw always from left to right, swap coords if necessary */
  50         if (x0 > x1)
  51                 GP_SWAP(x0, x1);
  52
  53         /* return immediately if the line is completely out of surface */
  54         if (y < 0 || y >= (int) context->h || x1 < 0 || x0 >= (int) context->w)
  55                 return;
  56
  57         /* clip the line against surface boundaries */
  58         x0 = GP_MAX(x0, 0);
  59         x1 = GP_MIN(x1, (int) context->w - 1);
  60
  61 %%  if ps.suffix in have_writepixels
  62         size_t length = 1 + x1 - x0;
  63         void *start = GP_PIXEL_ADDR(context, x0, y);
  64
  65 %%   if ps.needs_bit_endian()
  66         unsigned int offset = GP_PIXEL_ADDR_OFFSET_{{ ps.suffix }}(x0);
  67
  68         GP_WritePixels_{{ ps.suffix }}(start, offset, length, pixel);
  69 %%   else
  70         GP_WritePixels_{{ ps.suffix }}(start, length, pixel);
  71 %%   endif
  72
  73 %%  else
  74         for (;x0 <= x1; x0++)
  75                 GP_PutPixel_Raw_{{ ps.suffix }}(context, x0, y, pixel);
  76 %%  endif
  77 }
  78
  79 %% endfor
  80 %% endblock body