aboutsummaryrefslogtreecommitdiff
path: root/nuttx/graphics/nxfonts/nxfonts_convert.c
diff options
context:
space:
mode:
Diffstat (limited to 'nuttx/graphics/nxfonts/nxfonts_convert.c')
-rw-r--r--nuttx/graphics/nxfonts/nxfonts_convert.c290
1 files changed, 290 insertions, 0 deletions
diff --git a/nuttx/graphics/nxfonts/nxfonts_convert.c b/nuttx/graphics/nxfonts/nxfonts_convert.c
new file mode 100644
index 000000000..00cd61a6c
--- /dev/null
+++ b/nuttx/graphics/nxfonts/nxfonts_convert.c
@@ -0,0 +1,290 @@
+/****************************************************************************
+ * graphics/nxfonts/nxfonts_convert.c
+ *
+ * Copyright (C) 2008-2010 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stddef.h>
+#include <debug.h>
+
+#include <nuttx/nx/nxglib.h>
+#include <nuttx/nx/nxfonts.h>
+
+#include "nxfonts_internal.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Make sure the bits-per-pixel value has been set */
+
+#ifndef NXFONTS_BITSPERPIXEL
+# error "NXFONTS_BITSPERPIXEL must be defined on the command line"
+#endif
+
+/* Set up bit blit macros for this BPP */
+
+#if NXFONTS_BITSPERPIXEL == 1
+
+# define NXF_PIXELMASK 0x01
+# define NXF_SCALEX(x) ((x) >> 3)
+# define NXF_PIXEL_T uint8_t
+# define NXF_MULTIPIXEL(p) ((p) ? 0xff : 0x00)
+
+#elif NXFONTS_BITSPERPIXEL == 2
+
+# define NXF_PIXELMASK 0x03
+# define NXF_SCALEX(x) ((x) >> 2)
+# define NXF_PIXEL_T uint8_t
+# define NXF_MULTIPIXEL(p) ((uint8_t)(p) << 6 | (uint8_t)(p) << 4 | (uint8_t)(p) << 2 | (p))
+
+#elif NXFONTS_BITSPERPIXEL == 4
+
+# define NXF_PIXELMASK 0x0f
+# define NXF_SCALEX(x) ((x) >> 1)
+# define NXF_PIXEL_T uint8_t
+# define NXF_MULTIPIXEL(p) ((uint8_t)(p) << 4 | (p))
+
+#elif NXFONTS_BITSPERPIXEL == 8
+
+# define NXF_SCALEX(x) (x)
+# define NXF_PIXEL_T uint8_t
+
+#elif NXFONTS_BITSPERPIXEL == 16
+
+# define NXF_SCALEX(x) ((x) << 1)
+# define NXF_PIXEL_T uint16_t
+
+#elif NXFONTS_BITSPERPIXEL == 24
+
+# define NXF_SCALEX(x) (((x) << 1) + (x))
+# define NXF_PIXEL_T uint32_t
+
+#elif NXFONTS_BITSPERPIXEL == 32
+
+# define NXF_SCALEX(x) ((x) << 2)
+# define NXF_PIXEL_T uint32_t
+
+#endif
+
+#if NXFONTS_BITSPERPIXEL < 8
+# ifdef CONFIG_NX_PACKEDMSFIRST
+# define NXF_INITMASK (NXF_PIXELMASK << (8 - NXFONTS_BITSPERPIXEL))
+# else
+# define NXF_INITMASK NXF_PIXELMASK
+# endif
+#endif
+
+/* Form a function name by concatenating two strings */
+
+#define _NXF_FUNCNAME(a,b) a ## b
+#define NXF_FUNCNAME(a,b) _NXF_FUNCNAME(a,b)
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxf_convert_*bpp
+ *
+ * Description:
+ * Convert the 1BPP font to a new pixel depth
+ *
+ * Input Parameters:
+ * dest - The destination buffer provided by the caller.
+ * height - The max height of the returned char in rows
+ * width - The max width of the returned char in pixels
+ * stride - The width of the destination buffer in bytes
+ * bm - Describes the character glyph to convert
+ * color - The color to use for '1' bits in the font bitmap
+ * (0 bits are transparent)
+ *
+ * Returned Value:
+ * OK on Success, ERROR: on failure with errno set appropriately.
+ * (never fails)
+ *
+ ****************************************************************************/
+
+int NXF_FUNCNAME(nxf_convert,NXFONTS_SUFFIX)
+(FAR NXF_PIXEL_T *dest, uint16_t height, uint16_t width, uint16_t stride,
+ FAR const struct nx_fontbitmap_s *bm, nxgl_mxpixel_t color)
+{
+ FAR uint8_t *line;
+ FAR NXF_PIXEL_T *dptr;
+ FAR const uint8_t *sptr;
+ uint8_t bmbyte;
+ int bmbit;
+ int row;
+ int col;
+ int bmndx;
+
+#if NXFONTS_BITSPERPIXEL < 8
+ NXF_PIXEL_T mpixel;
+ NXF_PIXEL_T mask;
+ NXF_PIXEL_T pixel;
+ int nbits;
+#endif
+
+ /* Get the starting position */
+
+ line = (uint8_t*)dest + bm->metric.yoffset * stride + NXF_SCALEX(bm->metric.xoffset);
+
+ /* Then copy the font */
+
+ height = ngl_min(bm->metric.height, height - bm->metric.yoffset);
+ width = ngl_min(bm->metric.width, width - bm->metric.xoffset);
+
+ /* Render each row of the glyph */
+
+ sptr = bm->bitmap;
+#if NXFONTS_BITSPERPIXEL < 8
+ mpixel = NXF_MULTIPIXEL(color);
+
+ /* Handle each row in both the input and output */
+
+ for (row = 0; row < height; row++)
+ {
+ /* Process each byte in the glyph row */
+
+ col = 0;
+ dptr = (FAR NXF_PIXEL_T*)line;
+ pixel = *dptr;
+ mask = NXF_INITMASK;
+ nbits = 0;
+
+ for (bmndx = 0; bmndx < bm->metric.stride && col < width; bmndx++)
+ {
+ bmbyte = *sptr++;
+
+ /* Process each bit in one byte */
+
+ for (bmbit = 7; bmbit >= 0 && col < width; bmbit--, col++)
+ {
+ /* Is the bit set? */
+
+ if (bmbyte & (1 << bmbit))
+ {
+ /* Yes.. set the bit to 'color' in the output */
+
+ pixel = ((pixel & ~mask) | (mpixel & mask));
+ }
+
+#ifdef CONFIG_NX_PACKEDMSFIRST
+ mask >>= NXFONTS_BITSPERPIXEL;
+#else
+ mask <<= NXFONTS_BITSPERPIXEL;
+#endif
+ nbits += NXFONTS_BITSPERPIXEL;
+ if (nbits >= 8)
+ {
+ *dptr++ = pixel;
+ pixel = *dptr;
+ mask = NXF_INITMASK;
+ nbits = 0;
+ }
+ }
+ }
+
+ /* The entire glyph row has been rendered. Handle any fractional bytes at
+ * the end of the row
+ */
+
+ if (nbits > 0)
+ {
+ *dptr = pixel;
+ }
+
+ /* Point to the beginning of the next row */
+
+ line += stride;
+ }
+#else
+ /* Handle each row in both the input and output */
+
+ for (row = 0; row < height; row++)
+ {
+ /* Process each byte in the glyph */
+
+ col = 0;
+ dptr = (FAR NXF_PIXEL_T*)line;
+
+ for (bmndx = 0; bmndx < bm->metric.stride && col < width; bmndx++)
+ {
+ bmbyte = *sptr++;
+
+ /* Process each bit in the byte */
+
+ for (bmbit = 7; bmbit >= 0 && col < width; bmbit--, col++)
+ {
+ /* Is the bit set? */
+
+ if (bmbyte & (1 << bmbit))
+ {
+ /* Yes.. set the bit to 'color' in the output */
+
+ *dptr++ = color;
+ }
+ else
+ {
+ /* No... keep the background color in the output */
+
+ dptr++;
+ }
+ }
+ }
+
+ /* Advance to the beginning of the next line in the destination */
+
+ line += stride;
+ }
+#endif
+ return OK;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-31 07:47:56 +0000