diff options
Diffstat (limited to 'ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_pb16h2.c')
| -rwxr-xr-x | ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_pb16h2.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_pb16h2.c b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_pb16h2.c new file mode 100755 index 000000000..2d0523cf8 --- /dev/null +++ b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_pb16h2.c @@ -0,0 +1,208 @@ +/* + + u8g_pb16h2.c + + 2 bit per pixel page buffer + byte has horizontal orientation + + Universal 8bit Graphics Library + + Copyright (c) 2011, olikraus@gmail.com + All rights reserved. + + Redistribution and use in source and binary forms, with or without modification, + are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this list + of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or other + materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND + CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, + INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +*/ + +#include "u8g.h" +#include <string.h> + +void u8g_pb16h2_Clear(u8g_pb_t *b) +{ + uint8_t *ptr = (uint8_t *)b->buf; + uint8_t *end_ptr = ptr; + + /* two bits per pixel, 16 bits height --> 8 pixel --> 4 pixel per byte */ + end_ptr += b->width; + end_ptr += b->width; + + do + { + *ptr++ = 0; + } while( ptr != end_ptr ); +} + +void u8g_pb16h2_Init(u8g_pb_t *b, void *buf, u8g_uint_t width) +{ + b->buf = buf; + b->width = width; + u8g_pb16h2_Clear(b); +} + +static void u8g_pb16h2_set_pixel(u8g_pb_t *b, u8g_uint_t x, u8g_uint_t y, uint8_t color_index, uint8_t is_or) U8G_NOINLINE; +static void u8g_pb16h2_set_pixel(u8g_pb_t *b, u8g_uint_t x, u8g_uint_t y, uint8_t color_index, uint8_t is_or) +{ + register uint8_t mask; + register uint16_t tmp; + + uint8_t *ptr = b->buf; + + y -= b->p.page_y0; + + tmp = b->width; + tmp >>= 2; + tmp *= (uint8_t)y; + ptr += tmp; + + tmp = x; + tmp >>= 2; + ptr += tmp; + + tmp = x; + tmp &= 3; + tmp <<= 1; + if ( is_or == 0 ) + { + mask = 3; + mask <<= tmp; + mask = ~mask; + *ptr &= mask; + } + color_index &= 3; + color_index <<= tmp; + *ptr |= color_index; +} + + +void u8g_pb16h2_SetPixel(u8g_pb_t *b, const u8g_dev_arg_pixel_t * const arg_pixel, uint8_t is_or) +{ + if ( arg_pixel->y < b->p.page_y0 ) + return; + if ( arg_pixel->y > b->p.page_y1 ) + return; + if ( arg_pixel->x >= b->width ) + return; + u8g_pb16h2_set_pixel(b, arg_pixel->x, arg_pixel->y, arg_pixel->color, is_or); +} + + +void u8g_pb16h2_Set8PixelStd(u8g_pb_t *b, u8g_dev_arg_pixel_t *arg_pixel) +{ + register uint8_t pixel = arg_pixel->pixel; + do + { + if ( pixel & 128 ) + { + u8g_pb16h2_SetPixel(b, arg_pixel, 0); + } + switch( arg_pixel->dir ) + { + case 0: arg_pixel->x++; break; + case 1: arg_pixel->y++; break; + case 2: arg_pixel->x--; break; + case 3: arg_pixel->y--; break; + } + pixel <<= 1; + } while( pixel != 0 ); +} + +void u8g_pb16h2_Or4PixelStd(u8g_pb_t *b, u8g_dev_arg_pixel_t *arg_pixel) +{ + register uint8_t pixel = arg_pixel->pixel; + do + { + arg_pixel->color = pixel & 0x0c0; + arg_pixel->color >>= 6; + u8g_pb16h2_SetPixel(b, arg_pixel, 1); + switch( arg_pixel->dir ) + { + case 0: arg_pixel->x++; break; + case 1: arg_pixel->y++; break; + case 2: arg_pixel->x--; break; + case 3: arg_pixel->y--; break; + } + pixel <<= 2; + } while( pixel != 0 ); +} + + +uint8_t u8g_dev_pb16h2_base_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg) +{ + u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem); + switch(msg) + { + case U8G_DEV_MSG_SET_8PIXEL: + if ( u8g_pb_Is8PixelVisible(pb, (u8g_dev_arg_pixel_t *)arg) ) + { + u8g_pb16h2_Set8PixelStd(pb, (u8g_dev_arg_pixel_t *)arg); + } + break; + case U8G_DEV_MSG_SET_PIXEL: + u8g_pb16h2_SetPixel(pb, (u8g_dev_arg_pixel_t *)arg, 0); + break; + case U8G_DEV_MSG_SET_4TPIXEL: + u8g_pb16h2_Or4PixelStd(pb, (u8g_dev_arg_pixel_t *)arg); + break; + case U8G_DEV_MSG_SET_TPIXEL: + u8g_pb16h2_SetPixel(pb, (u8g_dev_arg_pixel_t *)arg, 1); + break; + case U8G_DEV_MSG_INIT: + break; + case U8G_DEV_MSG_STOP: + break; + case U8G_DEV_MSG_PAGE_FIRST: + u8g_page_First(&(pb->p)); + u8g_pb16h2_Clear(pb); + break; + case U8G_DEV_MSG_PAGE_NEXT: + if ( u8g_page_Next(&(pb->p)) == 0 ) + return 0; + u8g_pb16h2_Clear(pb); + break; +#ifdef U8G_DEV_MSG_IS_BBX_INTERSECTION + case U8G_DEV_MSG_IS_BBX_INTERSECTION: + return u8g_pb_IsIntersection(pb, (u8g_dev_arg_bbx_t *)arg); +#endif + case U8G_DEV_MSG_GET_PAGE_BOX: + u8g_pb_GetPageBox(pb, (u8g_box_t *)arg); + break; + case U8G_DEV_MSG_GET_WIDTH: + *((u8g_uint_t *)arg) = pb->width; + break; + case U8G_DEV_MSG_GET_HEIGHT: + *((u8g_uint_t *)arg) = pb->p.total_height; + break; + case U8G_DEV_MSG_SET_COLOR_ENTRY: + break; + case U8G_DEV_MSG_SET_XY_CB: + break; + case U8G_DEV_MSG_GET_MODE: + return U8G_MODE_GRAY2BIT; + } + return 1; +} + + |