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- /****************************************************************************
- * graphics/nxterm/nxterm_font.c
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <string.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/kmalloc.h>
- #include "nxterm.h"
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxterm_fontsize
- ****************************************************************************/
- static int nxterm_fontsize(FAR struct nxterm_state_s *priv, uint8_t ch,
- FAR struct nxgl_size_s *size)
- {
- FAR const struct nx_fontbitmap_s *fbm;
- NXHANDLE hfont;
- /* Get the handle of the font managed by the font cache */
- hfont = nxf_cache_getfonthandle(priv->fcache);
- DEBUGASSERT(hfont != NULL);
- /* Does the character code map to a font? */
- fbm = nxf_getbitmap(hfont, ch);
- if (fbm)
- {
- /* Yes.. return the font size */
- size->w = fbm->metric.width + fbm->metric.xoffset;
- size->h = fbm->metric.height + fbm->metric.yoffset;
- return OK;
- }
- return -ENOENT;
- }
- /****************************************************************************
- * Name: nxterm_fillspace
- ****************************************************************************/
- static void nxterm_fillspace(FAR struct nxterm_state_s *priv,
- FAR const struct nxgl_rect_s *rect,
- FAR const struct nxterm_bitmap_s *bm)
- {
- #if 0 /* Not necessary now, but perhaps in the future with VT100 support. */
- struct nxgl_rect_s bounds;
- struct nxgl_rect_s intersection;
- int ret;
- /* Construct a bounding box for the glyph */
- bounds.pt1.x = bm->pos.x;
- bounds.pt1.y = bm->pos.y;
- bounds.pt2.x = bm->pos.x + priv->spwidth - 1;
- bounds.pt2.y = bm->pos.y + priv->fheight - 1;
- # /* Should this also be clipped to a region in the window? */
- if (rect != NULL)
- {
- /* Get the intersection of the redraw region and the character bitmap */
- nxgl_rectintersect(&intersection, rect, &bounds);
- }
- else
- {
- /* The intersection is the whole glyph */
- nxgl_rectcopy(&intersection, &bounds);
- }
- /* Check for empty intersections */
- if (!nxgl_nullrect(&intersection))
- {
- /* Fill the bitmap region with the background color, erasing the
- * character from the display. NOTE: This region might actually
- * be obscured... NX will handle that case.
- */
- ret = priv->ops->fill(priv, &intersection, priv->wndo.wcolor);
- if (ret < 0)
- {
- gerr("ERROR: fill() method failed: %d\n", ret);
- }
- }
- #endif
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxterm_addchar
- *
- * Description:
- * This is part of the nxterm_putc logic. It creates and positions a
- * the character and renders (or re-uses) a glyph for font.
- *
- ****************************************************************************/
- FAR const struct nxterm_bitmap_s *
- nxterm_addchar(FAR struct nxterm_state_s *priv, uint8_t ch)
- {
- FAR struct nxterm_bitmap_s *bm = NULL;
- FAR const struct nxfonts_glyph_s *glyph;
- /* Is there space for another character on the display? */
- if (priv->nchars < priv->maxchars)
- {
- /* Yes, setup the bitmap information */
- bm = &priv->bm[priv->nchars];
- bm->code = ch;
- bm->flags = 0;
- bm->pos.x = priv->fpos.x;
- bm->pos.y = priv->fpos.y;
- /* Find (or create) the matching glyph */
- glyph = nxf_cache_getglyph(priv->fcache, ch);
- if (!glyph)
- {
- /* No, there is no font for this code.
- * Just mark this as a space.
- */
- bm->flags |= BMFLAGS_NOGLYPH;
- /* Set up the next character position */
- priv->fpos.x += priv->spwidth;
- }
- else
- {
- /* Set up the next character position */
- priv->fpos.x += glyph->width;
- }
- /* Success.. increment nchars to retain this character */
- priv->nchars++;
- }
- return bm;
- }
- /****************************************************************************
- * Name: nxterm_hidechar
- *
- * Description:
- * Erase a character from the window.
- *
- ****************************************************************************/
- int nxterm_hidechar(FAR struct nxterm_state_s *priv,
- FAR const struct nxterm_bitmap_s *bm)
- {
- struct nxgl_rect_s bounds;
- struct nxgl_size_s fsize;
- int ret;
- /* Get the size of the font glyph. If nxterm_fontsize, then the
- * character will have been rendered as a space, and no display
- * modification is required (not an error).
- */
- ret = nxterm_fontsize(priv, bm->code, &fsize);
- if (ret < 0)
- {
- /* It was rendered as a space. */
- return OK;
- }
- /* Construct a bounding box for the glyph */
- bounds.pt1.x = bm->pos.x;
- bounds.pt1.y = bm->pos.y;
- bounds.pt2.x = bm->pos.x + fsize.w - 1;
- bounds.pt2.y = bm->pos.y + fsize.h - 1;
- /* Fill the bitmap region with the background color, erasing the
- * character from the display. NOTE: This region might actually
- * be obscured... NX will handle that case.
- */
- return priv->ops->fill(priv, &bounds, priv->wndo.wcolor);
- }
- /****************************************************************************
- * Name: nxterm_backspace
- *
- * Description:
- * Remove the last character from the window.
- *
- ****************************************************************************/
- int nxterm_backspace(FAR struct nxterm_state_s *priv)
- {
- FAR struct nxterm_bitmap_s *bm;
- int ndx;
- int ret = -ENOENT;
- /* Is there a character on the display? */
- if (priv->nchars > 0)
- {
- /* Yes.. Get the index to the last bitmap on the display */
- ndx = priv->nchars - 1;
- bm = &priv->bm[ndx];
- /* Erase the character from the display */
- ret = nxterm_hidechar(priv, bm);
- /* The current position to the location where the last character was */
- priv->fpos.x = bm->pos.x;
- priv->fpos.y = bm->pos.y;
- /* Decrement nchars to discard this character */
- priv->nchars = ndx;
- }
- return ret;
- }
- /****************************************************************************
- * Name: nxterm_home
- *
- * Description:
- * Set the next character position to the top-left corner of the display.
- *
- ****************************************************************************/
- void nxterm_home(FAR struct nxterm_state_s *priv)
- {
- /* The first character is one space from the left */
- priv->fpos.x = priv->spwidth;
- /* And CONFIG_NXTERM_LINESEPARATION lines from the top */
- priv->fpos.y = CONFIG_NXTERM_LINESEPARATION;
- }
- /****************************************************************************
- * Name: nxterm_newline
- *
- * Description:
- * Set the next character position to the beginning of the next line.
- *
- ****************************************************************************/
- void nxterm_newline(FAR struct nxterm_state_s *priv)
- {
- /* Carriage return: The first character is one space from the left */
- priv->fpos.x = priv->spwidth;
- /* Linefeed: Down the max font height + CONFIG_NXTERM_LINESEPARATION */
- priv->fpos.y += (priv->fheight + CONFIG_NXTERM_LINESEPARATION);
- }
- /****************************************************************************
- * Name: nxterm_fillchar
- *
- * Description:
- * This implements the character display. It is part of the nxterm_putc
- * operation but may also be used when redrawing an existing display.
- *
- ****************************************************************************/
- void nxterm_fillchar(FAR struct nxterm_state_s *priv,
- FAR const struct nxgl_rect_s *rect,
- FAR const struct nxterm_bitmap_s *bm)
- {
- FAR const struct nxfonts_glyph_s *glyph;
- struct nxgl_rect_s bounds;
- struct nxgl_rect_s intersection;
- struct nxgl_size_s fsize;
- int ret;
- /* Handle the special case of spaces which have no glyph bitmap */
- if (BM_ISSPACE(bm))
- {
- nxterm_fillspace(priv, rect, bm);
- return;
- }
- /* Get the size of the font glyph (which may not have been created yet) */
- ret = nxterm_fontsize(priv, bm->code, &fsize);
- if (ret < 0)
- {
- /* This would mean that there is no bitmap for the character code and
- * that the font would be rendered as a space. But this case should
- * never happen here because the BM_ISSPACE() should have already
- * found all such cases.
- */
- return;
- }
- /* Construct a bounding box for the glyph */
- bounds.pt1.x = bm->pos.x;
- bounds.pt1.y = bm->pos.y;
- bounds.pt2.x = bm->pos.x + fsize.w - 1;
- bounds.pt2.y = bm->pos.y + fsize.h - 1;
- /* Should this also be clipped to a region in the window? */
- if (rect != NULL)
- {
- /* Get the intersection of the redraw region and the character bitmap */
- nxgl_rectintersect(&intersection, rect, &bounds);
- }
- else
- {
- /* The intersection is the whole glyph */
- nxgl_rectcopy(&intersection, &bounds);
- }
- /* Check for empty intersections */
- if (!nxgl_nullrect(&intersection))
- {
- FAR const void *src;
- /* Find (or create) the glyph that goes with this font */
- glyph = nxf_cache_getglyph(priv->fcache, 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);
- DEBUGASSERT(ret >= 0);
- }
- }
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