u8g_pb32h1.c

00001 /*
00002 
00003   u8g_pb32h1.c
00004   
00005   2x 8bit height monochrom (1 bit) page buffer
00006   byte has horizontal orientation
00007 
00008   Universal 8bit Graphics Library
00009   
00010   Copyright (c) 2012, olikraus@gmail.com
00011   All rights reserved.
00012 
00013   Redistribution and use in source and binary forms, with or without modification, 
00014   are permitted provided that the following conditions are met:
00015 
00016   * Redistributions of source code must retain the above copyright notice, this list 
00017     of conditions and the following disclaimer.
00018     
00019   * Redistributions in binary form must reproduce the above copyright notice, this 
00020     list of conditions and the following disclaimer in the documentation and/or other 
00021     materials provided with the distribution.
00022 
00023   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
00024   CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
00025   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
00026   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
00027   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
00028   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
00029   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
00030   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
00031   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
00032   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
00033   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
00034   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
00035   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
00036 
00037 
00038   total buffer size is limited to 2*256 bytes because of the calculation inside the set pixel procedure
00039 
00040 
00041 */
00042 
00043 #include "u8g.h"
00044 #include <string.h>
00045 
00046 
00047 void u8g_pb32h1_Init(u8g_pb_t *b, void *buf, u8g_uint_t width) U8G_NOINLINE;
00048 void u8g_pb32h1_set_pixel(u8g_pb_t *b, u8g_uint_t x, u8g_uint_t y, uint8_t color_index) U8G_NOINLINE;
00049 void u8g_pb32h1_SetPixel(u8g_pb_t *b, const u8g_dev_arg_pixel_t * const arg_pixel) U8G_NOINLINE ;
00050 void u8g_pb32h1_Set8PixelStd(u8g_pb_t *b, u8g_dev_arg_pixel_t *arg_pixel) U8G_NOINLINE;
00051 uint8_t u8g_dev_pb8h1_base_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg);
00052 
00053 void u8g_pb32h1_Clear(u8g_pb_t *b)
00054 {
00055   uint8_t *ptr = (uint8_t *)b->buf;
00056   uint8_t *end_ptr = ptr;
00057   end_ptr += b->width*4;
00058   do
00059   {
00060     *ptr++ = 0;
00061   } while( ptr != end_ptr );
00062 }
00063 
00064 
00065 
00066 void u8g_pb32h1_Init(u8g_pb_t *b, void *buf, u8g_uint_t width)
00067 {
00068   b->buf = buf;
00069   b->width = width;
00070   u8g_pb32h1_Clear(b);
00071 }
00072 
00073 
00074 /* limitation: total buffer must not exceed 2*256 bytes */
00075 void u8g_pb32h1_set_pixel(u8g_pb_t *b, u8g_uint_t x, u8g_uint_t y, uint8_t color_index)
00076 {
00077   register uint8_t mask;
00078   uint16_t tmp;
00079   uint8_t *ptr = b->buf;
00080   
00081   y -= b->p.page_y0;
00082   tmp = b->width;
00083   tmp >>= 3;
00084   tmp *= y;
00085   ptr += tmp;
00086   
00087   mask = 0x080;
00088   mask >>= x & 7;
00089   x >>= 3;
00090   ptr += x;
00091   if ( color_index )
00092   {
00093     *ptr |= mask;
00094   }
00095   else
00096   {
00097     mask ^=0xff;
00098     *ptr &= mask;
00099   }
00100   
00101 }
00102 
00103 
00104 void u8g_pb32h1_SetPixel(u8g_pb_t *b, const u8g_dev_arg_pixel_t * const arg_pixel)
00105 {
00106   if ( arg_pixel->y < b->p.page_y0 )
00107     return;
00108   if ( arg_pixel->y > b->p.page_y1 )
00109     return;
00110   if ( arg_pixel->x >= b->width )
00111     return;
00112   u8g_pb32h1_set_pixel(b, arg_pixel->x, arg_pixel->y, arg_pixel->color);
00113 }
00114 
00115 void u8g_pb32h1_Set8PixelStd(u8g_pb_t *b, u8g_dev_arg_pixel_t *arg_pixel)
00116 {
00117   register uint8_t pixel = arg_pixel->pixel;
00118   do
00119   {
00120     if ( pixel & 128 )
00121     {
00122       u8g_pb32h1_SetPixel(b, arg_pixel);
00123     }
00124     switch( arg_pixel->dir )
00125     {
00126       case 0: arg_pixel->x++; break;
00127       case 1: arg_pixel->y++; break;
00128       case 2: arg_pixel->x--; break;
00129       case 3: arg_pixel->y--; break;
00130     }
00131     pixel <<= 1;
00132   } while( pixel != 0  );
00133 }
00134 
00135 void u8g_pb32h1_Set8PixelOpt2(u8g_pb_t *b, u8g_dev_arg_pixel_t *arg_pixel)
00136 {
00137   register uint8_t pixel = arg_pixel->pixel;
00138   u8g_uint_t dx = 0;
00139   u8g_uint_t dy = 0;
00140   
00141   switch( arg_pixel->dir )
00142   {
00143     case 0: dx++; break;
00144     case 1: dy++; break;
00145     case 2: dx--; break;
00146     case 3: dy--; break;
00147   }
00148   
00149   do
00150   {
00151     if ( pixel & 128 )
00152       u8g_pb32h1_SetPixel(b, arg_pixel);
00153     arg_pixel->x += dx;
00154     arg_pixel->y += dy;
00155     pixel <<= 1;
00156   } while( pixel != 0  );  
00157 }
00158 
00159 
00160 uint8_t u8g_dev_pb32h1_base_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
00161 {
00162   u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
00163   switch(msg)
00164   {
00165     case U8G_DEV_MSG_SET_8PIXEL:
00166       if ( u8g_pb_Is8PixelVisible(pb, (u8g_dev_arg_pixel_t *)arg) )
00167         u8g_pb32h1_Set8PixelOpt2(pb, (u8g_dev_arg_pixel_t *)arg);
00168       break;
00169     case U8G_DEV_MSG_SET_PIXEL:
00170       u8g_pb32h1_SetPixel(pb, (u8g_dev_arg_pixel_t *)arg);
00171       break;
00172     case U8G_DEV_MSG_INIT:
00173       break;
00174     case U8G_DEV_MSG_STOP:
00175       break;
00176     case U8G_DEV_MSG_PAGE_FIRST:
00177       u8g_pb32h1_Clear(pb);
00178       u8g_page_First(&(pb->p));
00179       break;
00180     case U8G_DEV_MSG_PAGE_NEXT:
00181       if ( u8g_page_Next(&(pb->p)) == 0 )
00182         return 0;
00183       u8g_pb32h1_Clear(pb);
00184       break;
00185 #ifdef U8G_DEV_MSG_IS_BBX_INTERSECTION
00186     case U8G_DEV_MSG_IS_BBX_INTERSECTION:
00187       return u8g_pb_IsIntersection(pb, (u8g_dev_arg_bbx_t *)arg);
00188 #endif
00189     case U8G_DEV_MSG_GET_PAGE_BOX:
00190       u8g_pb_GetPageBox(pb, (u8g_box_t *)arg);
00191       break;
00192     case U8G_DEV_MSG_GET_WIDTH:
00193       *((u8g_uint_t *)arg) = pb->width;
00194       break;
00195     case U8G_DEV_MSG_GET_HEIGHT:
00196       *((u8g_uint_t *)arg) = pb->p.total_height;
00197       break;
00198     case U8G_DEV_MSG_SET_COLOR_ENTRY:
00199       break;
00200     case U8G_DEV_MSG_SET_XY_CB:
00201       break;
00202     case U8G_DEV_MSG_GET_MODE:
00203       return U8G_MODE_BW;
00204   }
00205   return 1;
00206 }
00207  
00208   
00209