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Diffstat (limited to 'nuttx/graphics/nxglib/nxglib_fillrun.h')
| -rw-r--r-- | nuttx/graphics/nxglib/nxglib_fillrun.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/nuttx/graphics/nxglib/nxglib_fillrun.h b/nuttx/graphics/nxglib/nxglib_fillrun.h new file mode 100644 index 000000000..b1d8a3a7f --- /dev/null +++ b/nuttx/graphics/nxglib/nxglib_fillrun.h @@ -0,0 +1,196 @@ +/**************************************************************************** + * graphics/nxglib/nxsglib_fullrun.h + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * 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 OWNER 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. + * + ****************************************************************************/ + +#ifndef __GRAPHICS_NXGLIB_NXGLIB_FILLRUN_H +#define __GRAPHICS_NXGLIB_NXGLIB_FILLRUN_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <stdint.h> +#include <string.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +#if NXGLIB_BITSPERPIXEL < 16 +# define NXGLIB_RUNTYPE uint8_t +#elif NXGLIB_BITSPERPIXEL == 16 +# define NXGLIB_RUNTYPE uint16_t +#else +# define NXGLIB_RUNTYPE uint32_t +#endif + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#if NXGLIB_BITSPERPIXEL == 2 +static uint8_t g_wide_2bpp[4] = { 0x00, 0x55, 0xaa, 0xff }; +#endif + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxgl_fillrun_*bpp + * + * Description: + * fill a run with the specified color. + * + ****************************************************************************/ + +#if NXGLIB_BITSPERPIXEL == 1 +static inline void nxgl_fillrun_1bpp(FAR uint8_t *run, nxgl_mxpixel_t color, + size_t npixels) +{ + /* Get the number of bytes to fill */ + + unsigned int nbytes = (npixels + 7) >> 3; + + /* Get the value of the byte to fill */ + + uint8_t wide = (color & 1) != 0 ? 0xff : 0x00; + + /* Fill the run with the color (it is okay to run a fractional byte over + * the end) + */ + + memset(run, wide, nbytes); +} + +#elif NXGLIB_BITSPERPIXEL == 2 +static inline void nxgl_fillrun_2bpp(FAR uint8_t *run, nxgl_mxpixel_t color, + size_t npixels) +{ + /* Get the number of bytes to fill */ + + unsigned int nbytes = (npixels + 3) >> 2; + + /* Get the value of the byte to fill */ + + uint8_t wide = g_wide_2bpp[color & 3]; + + /* Fill the run with the color (it is okay to run a fractional byte over + * the end) + */ + + memset(run, wide, nbytes); +} + +#elif NXGLIB_BITSPERPIXEL == 4 +static inline void nxgl_fillrun_4bpp(FAR uint8_t *run, nxgl_mxpixel_t color, + size_t npixels) +{ + /* Get the number of bytes to fill */ + + unsigned int nbytes = (npixels + 1) >> 1; + + /* Get the value of the byte to fill */ + + uint8_t narrow = (uint8_t)color & 0x0f; + uint8_t wide = narrow | (narrow << 4); + + /* Fill the run with the color (it is okay to run a fractional byte over + * the end) + */ + + memset(run, wide, nbytes); +} + +#elif NXGLIB_BITSPERPIXEL == 8 +static inline void nxgl_fillrun_8bpp(FAR uint8_t *run, nxgl_mxpixel_t color, + size_t npixels) +{ + /* Fill the run with the color (it is okay to run a fractional byte overy the end */ + + memset(run, color, npixels); +} + +#elif NXGLIB_BITSPERPIXEL == 16 +static inline void nxgl_fillrun_16bpp(FAR uint16_t *run, nxgl_mxpixel_t color, + size_t npixels) +{ + /* Fill the run with the color (it is okay to run a fractional byte overy the end */ + + while (npixels-- > 0) + { + *run++ = (uint16_t)color; + } +} + +#elif NXGLIB_BITSPERPIXEL == 24 +static inline void nxgl_fillrun_24bpp(FAR uint32_t *run, nxgl_mxpixel_t color, size_t npixels) +{ + /* Fill the run with the color (it is okay to run a fractional byte overy the end */ +#warning "Assuming 24-bit color is not packed" + while (npixels-- > 0) + { + *run++ = (uint32_t)color; + } +} + +#elif NXGLIB_BITSPERPIXEL == 32 +static inline void nxgl_fillrun_32bpp(FAR uint32_t *run, nxgl_mxpixel_t color, size_t npixels) +{ + /* Fill the run with the color (it is okay to run a fractional byte overy the end */ + + while (npixels-- > 0) + { + *run++ = (uint32_t)color; + } +} +#else +# error "Unsupported value of NXGLIB_BITSPERPIXEL" +#endif +#endif /* __GRAPHICS_NXGLIB_NXGLIB_FILLRUN_H */ + + |