Browse Source
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4526 7fd9a85b-ad96-42d3-883c-3090e2eb8679sbg
patacongo
13 years ago
5 changed files with 645 additions and 13 deletions
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/****************************************************************************
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* nuttx/graphics/nxconsole/nxcon_font.c |
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* |
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* Copyright (C) 2012 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 <stdint.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/nx/nx.h> |
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#include <nuttx/nx/nxtk.h> |
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#include <nuttx/nx/nxfonts.h> |
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#include "nxcon_internal.h" |
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/****************************************************************************
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* Definitions |
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****************************************************************************/ |
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/* Select renderer -- Some additional logic would be required to support
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* pixel depths that are not directly addressable (1,2,4, and 24). |
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*/ |
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#if CONFIG_NXCONSOLE_BPP == 1 |
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# define RENDERER nxf_convert_1bpp |
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#elif CONFIG_NXCONSOLE_BPP == 2 |
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# define RENDERER nxf_convert_2bpp |
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#elif CONFIG_NXCONSOLE_BPP == 4 |
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# define RENDERER nxf_convert_4bpp |
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#elif CONFIG_NXCONSOLE_BPP == 8 |
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# define RENDERER nxf_convert_8bpp |
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#elif CONFIG_NXCONSOLE_BPP == 16 |
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# define RENDERER nxf_convert_16bpp |
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#elif CONFIG_NXCONSOLE_BPP == 24 |
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# define RENDERER nxf_convert_24bpp |
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#elif CONFIG_NXCONSOLE_BPP == 32 |
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# define RENDERER nxf_convert_32bpp |
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#else |
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# error "Unsupported CONFIG_NXCONSOLE_BPP" |
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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 Function Prototypes |
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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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* Name: nxcon_freeglyph |
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****************************************************************************/ |
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static void nxcon_freeglyph(FAR struct nxcon_glyph_s *glyph) |
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{ |
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if (glyph->bitmap) |
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{ |
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free(glyph->bitmap); |
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} |
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memset(glyph, 0, sizeof(struct nxcon_glyph_s)); |
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} |
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/****************************************************************************
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* Name: nxcon_allocglyph |
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****************************************************************************/ |
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static inline FAR struct nxcon_glyph_s * |
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nxcon_allocglyph(FAR struct nxcon_state_s *priv) |
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{ |
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#ifdef CONFIG_NXCONSOLE_FONTCACHE |
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FAR struct nxcon_glyph_s *glyph = NULL; |
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FAR struct nxcon_glyph_s *luglyph = NULL; |
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uint8_t luusecnt; |
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int i; |
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/* Search through the glyph cache looking for an unused glyph. Also, keep
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* track of the least used glyph as well. We need that if we have to replace |
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* a glyph in the cache. |
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*/ |
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for (i = 0; i < priv->maxglyphs; i++) |
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{ |
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/* Is this glyph in use? */ |
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glyph = &priv->glyph[i]; |
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if (!glyph->usecnt) |
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{ |
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/* No.. return this glyph with a use count of one */ |
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glyph->usecnt = 1; |
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return glyph; |
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} |
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/* Yes.. check for the least recently used */ |
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if (!luglyph || glyph->usecnt < luglyph->usecnt) |
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{ |
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luglyph = glyph; |
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} |
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} |
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/* If we get here, the glyph cache is full. We replace the least used
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* glyph with the one we need now. (luglyph can't be NULL). |
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*/ |
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luusecnt = luglyph->usecnt; |
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nxcon_freeglyph(luglyph); |
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/* But lets decrement all of the usecnts so that the new one one be so
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* far behind in the counts as the older ones. |
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*/ |
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if (luusecnt > 1) |
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{ |
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uint8_t decr = luusecnt - 1; |
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for (i = 0; i < priv->maxglyphs; i++) |
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{ |
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/* Is this glyph in use? */ |
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glyph = &priv->glyph[i]; |
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if (glyph->usecnt > decr) |
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{ |
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glyph->usecnt -= decr; |
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} |
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} |
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} |
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/* Then return the least used glyph */ |
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luglyph->usecnt = 1; |
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return luglyph; |
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#else |
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return &priv->glyph; |
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#endif |
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} |
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/****************************************************************************
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* Name: nxcon_findglyph |
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****************************************************************************/ |
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#ifdef CONFIG_NXCONSOLE_FONTCACHE |
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static FAR struct nxcon_glyph_s * |
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nxcon_findglyph(FAR struct nxcon_state_s *priv, uint8_t ch) |
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{ |
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int i; |
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/* First, try to find the glyph in the cache of pre-rendered glyphs */ |
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for (i = 0; i < priv->maxglyphs; i++) |
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{ |
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FAR struct nxcon_glyph_s *glyph = &priv->glyph[i]; |
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if (glyph->usecnt > 0 && glyph->code == ch) |
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{ |
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/* Increment the use count (unless it is already at the max) */ |
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if (glyph->usecnt < MAX_USECNT) |
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{ |
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glyph->usecnt++; |
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} |
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/* And return the glyph that we found */ |
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return glyph; |
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} |
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} |
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return NULL; |
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} |
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#endif |
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/****************************************************************************
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* Name: nxcon_renderglyph |
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****************************************************************************/ |
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static inline FAR struct nxcon_glyph_s * |
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nxcon_renderglyph(FAR struct nxcon_state_s *priv, |
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FAR const struct nx_fontbitmap_s *fbm, uint8_t ch) |
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{ |
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FAR struct nxcon_glyph_s *glyph = NULL; |
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FAR nxgl_mxpixel_t *ptr; |
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#if CONFIG_NXCONSOLE_BPP < 8 |
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nxgl_mxpixel_t pixel; |
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#endif |
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int bmsize; |
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int row; |
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int col; |
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int ret; |
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/* Make sure that there is room for another glyph */ |
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gvdbg("ch=%c [%02x]\n", isprint(ch) ? ch : '.', ch); |
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/* Allocate the glyph (always succeeds) */ |
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glyph = nxcon_allocglyph(priv); |
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glyph->code = ch; |
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/* Get the dimensions of the glyph */ |
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glyph->width = fbm->metric.width + fbm->metric.xoffset; |
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glyph->height = fbm->metric.height + fbm->metric.yoffset; |
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/* Allocate memory to hold the glyph with its offsets */ |
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glyph->stride = (glyph->width * CONFIG_NXCONSOLE_BPP + 7) / 8; |
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bmsize = glyph->stride * glyph->height; |
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glyph->bitmap = (FAR uint8_t *)malloc(bmsize); |
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if (glyph->bitmap) |
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{ |
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/* Initialize the glyph memory to the background color */ |
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#if CONFIG_NXCONSOLE_BPP < 8 |
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pixel = priv->wcolor[0]; |
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# if CONFIG_NXCONSOLE_BPP == 1 |
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/* Pack 1-bit pixels into a 2-bits */ |
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pixel &= 0x01; |
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pixel = (pixel) << 1 |pixel; |
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# endif |
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# if CONFIG_NXCONSOLE_BPP < 4 |
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/* Pack 2-bit pixels into a nibble */ |
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pixel &= 0x03; |
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pixel = (pixel) << 2 |pixel; |
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# endif |
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/* Pack 4-bit nibbles into a byte */ |
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pixel &= 0x0f; |
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pixel = (pixel) << 4 | pixel; |
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ptr = (FAR nxgl_mxpixel_t *)glyph->bitmap; |
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for (row = 0; row < glyph->height; row++) |
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{ |
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for (col = 0; col < glyph->stride; col++) |
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{ |
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/* Transfer the packed bytes into the buffer */ |
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*ptr++ = pixel; |
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} |
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} |
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#elif CONFIG_NXCONSOLE_BPP == 24 |
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# error "Additional logic is needed here for 24bpp support" |
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#else /* CONFIG_NXCONSOLE_BPP = {8,16,32} */ |
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ptr = (FAR nxgl_mxpixel_t *)glyph->bitmap; |
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for (row = 0; row < glyph->height; row++) |
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{ |
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/* Just copy the color value into the glyph memory */ |
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for (col = 0; col < glyph->width; col++) |
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{ |
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*ptr++ = priv->wndo.wcolor[0]; |
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} |
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} |
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#endif |
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/* Then render the glyph into the allocated memory */ |
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ret = RENDERER((FAR nxgl_mxpixel_t*)glyph->bitmap, |
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glyph->height, glyph->width, glyph->stride, |
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fbm, priv->wndo.fcolor[0]); |
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if (ret < 0) |
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{ |
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/* Actually, the RENDERER never returns a failure */ |
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gdbg("nxcon_renderglyph: RENDERER failed\n"); |
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nxcon_freeglyph(glyph); |
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glyph = NULL; |
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} |
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} |
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return glyph; |
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} |
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/****************************************************************************
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* Name: nxcon_fontsize |
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****************************************************************************/ |
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static int nxcon_fontsize(NXHANDLE hfont, uint8_t ch, FAR struct nxgl_size_s *size) |
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{ |
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FAR const struct nx_fontbitmap_s *fbm; |
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/* No, it is not cached... Does the code map to a font? */ |
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fbm = nxf_getbitmap(hfont, ch); |
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if (fbm) |
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{ |
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/* Yes.. return the font size */ |
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size->w = fbm->metric.width + fbm->metric.xoffset; |
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size->h = fbm->metric.height + fbm->metric.yoffset; |
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return OK; |
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} |
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return ERROR; |
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} |
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/****************************************************************************
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* Name: nxcon_getglyph |
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****************************************************************************/ |
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static FAR struct nxcon_glyph_s * |
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nxcon_getglyph(NXHANDLE hfont, FAR struct nxcon_state_s *priv, uint8_t ch) |
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{ |
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FAR struct nxcon_glyph_s *glyph; |
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FAR const struct nx_fontbitmap_s *fbm; |
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/* First, try to find the glyph in the cache of pre-rendered glyphs */ |
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#ifdef CONFIG_NXCONSOLE_FONTCACHE |
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glyph = nxcon_findglyph(priv, ch); |
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if (glyph) |
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{ |
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/* We found it in the cache .. return the cached glyph */ |
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return glyph; |
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} |
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#else |
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glyph = NULL; |
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#endif |
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/* No, it is not cached... Does the code map to a font? */ |
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fbm = nxf_getbitmap(hfont, ch); |
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if (fbm) |
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{ |
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/* Yes.. render the glyph */ |
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glyph = nxcon_renderglyph(priv, fbm, ch); |
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} |
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return glyph; |
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} |
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/****************************************************************************
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* Name: nxcon_addchar |
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* |
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* Description: |
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* This is part of the nxcon_putc logic. It creates and positions a |
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* the character and renders (or re-uses) a glyph for font. |
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* |
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****************************************************************************/ |
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static FAR const struct nxcon_bitmap_s * |
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nxcon_addchar(NXHANDLE hfont, FAR struct nxcon_state_s *priv, uint8_t ch) |
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{ |
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FAR struct nxcon_bitmap_s *bm = NULL; |
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FAR struct nxcon_glyph_s *glyph; |
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/* Is there space for another character on the display? */ |
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if (priv->nchars < priv->maxchars) |
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{ |
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/* Yes, setup the bitmap information */ |
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bm = &priv->bm[priv->nchars]; |
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bm->code = ch; |
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bm->flags = 0; |
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bm->pos.x = priv->fpos.x; |
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bm->pos.y = priv->fpos.y; |
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/* Find (or create) the matching glyph */ |
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glyph = nxcon_getglyph(hfont, priv, ch); |
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if (!glyph) |
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{ |
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/* No, there is no font for this code. Just mark this as a space. */ |
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bm->flags |= BMFLAGS_NOGLYPH; |
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/* Set up the next character position */ |
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priv->fpos.x += priv->spwidth; |
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} |
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else |
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{ |
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/* Set up the next character position */ |
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priv->fpos.x += glyph->width; |
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} |
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/* Success.. increment nchars to retain this character */ |
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priv->nchars++; |
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} |
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return bm; |
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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: nxcon_home |
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* |
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* Description: |
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* Set the next character position to the top-left corner of the display. |
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* |
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****************************************************************************/ |
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void nxcon_home(FAR struct nxcon_state_s *priv) |
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{ |
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/* The first character is one space from the left */ |
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priv->fpos.x = priv->spwidth; |
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/* And CONFIG_NXCONSOLE_LINESEPARATION lines from the top */ |
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priv->fpos.y = CONFIG_NXCONSOLE_LINESEPARATION; |
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} |
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/****************************************************************************
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* Name: nxcon_newline |
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* |
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* Description: |
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* Set the next character position to the beginning of the next line. |
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* |
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****************************************************************************/ |
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void nxcon_newline(FAR struct nxcon_state_s *priv) |
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{ |
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/* Carriage return: The first character is one space from the left */ |
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priv->fpos.x = priv->spwidth; |
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/* Linefeed: Down the max font height + CONFIG_NXCONSOLE_LINESEPARATION */ |
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priv->fpos.y += (priv->fheight + CONFIG_NXCONSOLE_LINESEPARATION); |
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} |
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/****************************************************************************
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* Name: nxcon_putc |
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* |
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* Description: |
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* Render the specified character at the current display position. |
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* |
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****************************************************************************/ |
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void nxcon_putc(FAR struct nxcon_state_s *priv, uint8_t ch) |
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{ |
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FAR const struct nxcon_bitmap_s *bm; |
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/* If it is a newline character, then just perform the logical newline
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* operation. |
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*/ |
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if (ch == '\n') |
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{ |
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nxcon_newline(priv); |
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} |
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/* Otherwise, find the glyph associated with the character and render it
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* onto the display. |
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*/ |
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else |
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{ |
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bm = nxcon_addchar(priv->font, priv, ch); |
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if (bm) |
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{ |
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nxcon_fillchar(priv, NULL, bm); |
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} |
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} |
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} |
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|
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/****************************************************************************
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* Name: nxcon_fillchar |
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* |
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* Description: |
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* This implements the character display. It is part of the nxcon_putc |
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* operation but may also be used when redrawing an existing display. |
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* |
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****************************************************************************/ |
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|
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void nxcon_fillchar(FAR struct nxcon_state_s *priv, |
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FAR const struct nxgl_rect_s *rect, |
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FAR const struct nxcon_bitmap_s *bm) |
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{ |
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FAR struct nxcon_glyph_s *glyph; |
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struct nxgl_rect_s bounds; |
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struct nxgl_rect_s intersection; |
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struct nxgl_size_s fsize; |
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int ret; |
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|
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/* Handle the special case of spaces which have no glyph bitmap */ |
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|
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if (BM_ISSPACE(bm)) |
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{ |
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return; |
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} |
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|
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/* Get the size of the font glyph (which may not have been created yet) */ |
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ret = nxcon_fontsize(priv->font, bm->code, &fsize); |
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if (ret < 0) |
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{ |
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/* This would mean that there is no bitmap for the character code and
|
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* that the font would be rendered as a space. But this case should |
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* never happen here because the BM_ISSPACE() should have already |
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* found all such cases. |
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*/ |
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|
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return; |
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} |
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|
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/* Construct a bounding box for the glyph */ |
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|
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bounds.pt1.x = bm->pos.x; |
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bounds.pt1.y = bm->pos.y; |
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bounds.pt2.x = bm->pos.x + fsize.w - 1; |
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bounds.pt2.y = bm->pos.y + fsize.h - 1; |
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|
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/* Should this also be clipped to a region in the window? */ |
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|
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if (rect) |
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{ |
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/* Get the intersection of the redraw region and the character bitmap */ |
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|
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nxgl_rectintersect(&intersection, rect, &bounds); |
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} |
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else |
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{ |
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/* The intersection is the whole glyph */ |
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|
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nxgl_rectcopy(&intersection, &bounds); |
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} |
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|
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/* Check for empty intersections */ |
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|
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if (!nxgl_nullrect(&intersection)) |
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{ |
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FAR const void *src; |
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|
||||
/* Find (or create) the glyph that goes with this font */ |
||||
|
||||
glyph = nxcon_getglyph(priv->font, priv, bm->code); |
||||
if (!glyph) |
||||
{ |
||||
/* Shouldn't happen */ |
||||
|
||||
return; |
||||
} |
||||
|
||||
/* Blit the font bitmap into the window */ |
||||
|
||||
src = (FAR const void *)glyph->bitmap; |
||||
ret = priv->ops->bitmap(priv, &intersection, &src, |
||||
&bm->pos, (unsigned int)glyph->stride); |
||||
if (ret < 0) |
||||
{ |
||||
gdbg("bitmap failed: %d\n", errno); |
||||
} |
||||
} |
||||
} |
||||
|
||||
Loading…
Reference in new issue