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153 lines
6.2 KiB
153 lines
6.2 KiB
/**************************************************************************** |
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* graphics/nxglib/lcd/nxglib_setpixel.c |
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* |
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* Copyright (C) 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <sys/types.h> |
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#include <stdint.h> |
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#include <nuttx/lcd/lcd.h> |
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#include <nuttx/nx/nxglib.h> |
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#include "nxglib_bitblit.h" |
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/**************************************************************************** |
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* Pre-Processor Definitions |
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****************************************************************************/ |
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#ifndef NXGLIB_SUFFIX |
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# error "NXGLIB_SUFFIX must be defined before including this header file" |
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#endif |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nxgl_setpixel_*bpp |
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* |
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* Descripton: |
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* Draw a single pixel in LCD memory at the given position and with the |
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* given color. This is equivalent to nxgl_fillrectangle_*bpp() with a 1x1 |
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* rectangle but is more efficient. |
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* |
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****************************************************************************/ |
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void NXGL_FUNCNAME(nxgl_setpixel,NXGLIB_SUFFIX) |
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(FAR struct lcd_planeinfo_s *pinfo, |
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FAR const struct nxgl_point_s *pos, |
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NXGL_PIXEL_T color) |
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{ |
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#if NXGLIB_BITSPERPIXEL < 8 |
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uint8_t shift; |
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uint8_t mask; |
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uint8_t pixel; |
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/* Read the byte that contains the pixel to be changed */ |
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(void)pinfo->getrun(pos->y, pos->x, &pixel, 8 / NXGLIB_BITSPERPIXEL); |
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/* Shift the color into the proper position */ |
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# ifdef CONFIG_NX_PACKEDMSFIRST |
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#if NXGLIB_BITSPERPIXEL == 1 |
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shift = (7 - (pos->x & 7)); /* Shift is 0, 1, ... 7 */ |
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mask = (1 << shift); /* Mask is 0x01, 0x02, .. 0x80 */ |
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color <<= shift; /* Color is positioned under the mask */ |
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#elif NXGLIB_BITSPERPIXEL == 2 |
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shift = (6 - ((pos->x & 3) << 1)); /* Shift is 0, 2, 4, or 6 */ |
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mask = (3 << shift); /* Mask is 0x03, 0x0c, 0x30, or 0xc0 */ |
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color <<= shift; /* Color is positioned under the mask */ |
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#elif NXGLIB_BITSPERPIXEL == 4 |
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shift = (4 - ((pos->x & 1) << 2)); /* Shift is 0 or 4 */ |
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mask = (15 << shift); /* Mask is 0x0f or 0xf0 */ |
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color <<= shift; /* Color is positioned under the mask */ |
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#else |
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# error "Unsupport pixel depth" |
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#endif |
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# else /* CONFIG_NX_PACKEDMSFIRST */ |
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#if NXGLIB_BITSPERPIXEL == 1 |
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shift = (pos->x & 7); /* Shift is 0, 1, ... 7 */ |
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mask = (1 << shift); /* Mask is 0x01, 0x02, .. 0x80 */ |
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color <<= shift; /* Color is positioned under the mask */ |
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#elif NXGLIB_BITSPERPIXEL == 2 |
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shift = (pos->x & 3) << 1; /* Shift is 0, 2, 4, or 6 */ |
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mask = (3 << shift); /* Mask is 0x03, 0x0c, 0x30, or 0xc0 */ |
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color <<= shift; /* Color is positioned under the mask */ |
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#elif NXGLIB_BITSPERPIXEL == 4 |
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shift = (pos->x & 1) << 2; /* Shift is 0 or 4 */ |
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mask = (15 << shift); /* Mask is 0x0f or 0xf0 */ |
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color <<= shift; /* Color is positioned under the mask */ |
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#else |
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# error "Unsupport pixel depth" |
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#endif |
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#endif /* CONFIG_NX_PACKEDMSFIRST */ |
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/* Handle masking of the fractional byte */ |
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pixel = (pixel & ~mask) | (color & mask); |
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/* Write the modified byte back to graphics memory */ |
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(void)pinfo->putrun(pos->y, pos->x, (FAR uint8_t *)&pixel, 8 / NXGLIB_BITSPERPIXEL); |
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#else |
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/* Draw a single pixel at this position raster line at this row */ |
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(void)pinfo->putrun(pos->y, pos->x, (FAR uint8_t *)&color, 1); |
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#endif |
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}
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