/**************************************************************************** * examples/nxtext/nxtext_bkgd.c * * Copyright (C) 2011-2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include #include #include #include "nxtext_internal.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /**************************************************************************** * Private Types ****************************************************************************/ /**************************************************************************** * Private Function Prototypes ****************************************************************************/ static void nxbg_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect, bool morem, FAR void *arg); static void nxbg_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size, FAR const struct nxgl_point_s *pos, FAR const struct nxgl_rect_s *bounds, FAR void *arg); #ifdef CONFIG_NX_XYINPUT static void nxbg_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos, uint8_t buttons, FAR void *arg); #endif #ifdef CONFIG_NX_KBD static void nxbg_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch, FAR void *arg); #endif /**************************************************************************** * Private Data ****************************************************************************/ static struct nxtext_state_s g_bgstate; static struct nxtext_bitmap_s g_bgbm[CONFIG_EXAMPLES_NXTEXT_BMCACHE]; static struct nxtext_glyph_s g_bgglyph[CONFIG_EXAMPLES_NXTEXT_GLCACHE]; /**************************************************************************** * Public Data ****************************************************************************/ /* Background window call table */ const struct nx_callback_s g_nxtextcb = { nxbg_redraw, /* redraw */ nxbg_position /* position */ #ifdef CONFIG_NX_XYINPUT , nxbg_mousein /* mousein */ #endif #ifdef CONFIG_NX_KBD , nxbg_kbdin /* kbdin */ #endif , NULL /* event */ }; /* Background window handle */ NXHANDLE g_bgwnd; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: nxbg_redrawrect ****************************************************************************/ static void nxbg_redrawrect(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect) { int ret; int i; ret = nx_fill(hwnd, rect, g_bgstate.wcolor); if (ret < 0) { printf("nxbg_redrawrect: nx_fill failed: %d\n", errno); } /* Fill each character on the display (Only the characters within rect * will actually be redrawn). */ for (i = 0; i < g_bgstate.nchars; i++) { nxtext_fillchar(hwnd, rect, &g_bgstate, g_bghfont, &g_bgstate.bm[i]); } } /**************************************************************************** * Name: nxbg_redraw ****************************************************************************/ static void nxbg_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect, bool more, FAR void *arg) { ginfo("hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n", hwnd, rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y, more ? "true" : "false"); nxbg_redrawrect(hwnd, rect); } /**************************************************************************** * Name: nxbg_position ****************************************************************************/ static void nxbg_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size, FAR const struct nxgl_point_s *pos, FAR const struct nxgl_rect_s *bounds, FAR void *arg) { FAR struct nxtext_state_s *st = (FAR struct nxtext_state_s *)arg; /* Report the position */ ginfo("hwnd=%p size=(%d,%d) pos=(%d,%d) bounds={(%d,%d),(%d,%d)}\n", hwnd, size->w, size->h, pos->x, pos->y, bounds->pt1.x, bounds->pt1.y, bounds->pt2.x, bounds->pt2.y); /* Have we picked off the window bounds yet? */ if (!b_haveresolution) { /* Save the background window handle */ g_bgwnd = hwnd; /* Save the background window size */ st->wsize.w = size->w; st->wsize.h = size->h; /* Save the window limits (these should be the same for all places and all windows */ g_xres = bounds->pt2.x + 1; g_yres = bounds->pt2.y + 1; b_haveresolution = true; sem_post(&g_semevent); ginfo("Have xres=%d yres=%d\n", g_xres, g_yres); } } /**************************************************************************** * Name: nxbg_mousein ****************************************************************************/ #ifdef CONFIG_NX_XYINPUT static void nxbg_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos, uint8_t buttons, FAR void *arg) { printf("nxbg_mousein: hwnd=%p pos=(%d,%d) button=%02x\n", hwnd, pos->x, pos->y, buttons); } #endif /**************************************************************************** * Name: nxbg_kbdin ****************************************************************************/ #ifdef CONFIG_NX_KBD static void nxbg_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch, FAR void *arg) { ginfo("hwnd=%p nch=%d\n", hwnd, nch); nxbg_write(hwnd, ch, nch); } #endif /**************************************************************************** * Name: nxbg_movedisplay * * Description: * This function implements the data movement for the scroll operation. If * we can read the displays framebuffer memory, then the job is pretty * easy. However, many displays (such as SPI-based LCDs) are often read- * only. ****************************************************************************/ static inline void nxbg_movedisplay(NXWINDOW hwnd, int bottom, int lineheight) { FAR struct nxtext_bitmap_s *bm; struct nxgl_rect_s rect; nxgl_coord_t row; int ret; int i; /* Move each row, one at a time. They could all be moved at once (by calling * nxbg_redrawrect), but the since the region is cleared, then re-written, the * effect would not be good. Below the region is also cleared and re-written, * however, in much smaller chunks. */ rect.pt1.x = 0; rect.pt2.x = g_bgstate.wsize.w - 1; for (row = LINE_SEPARATION; row < bottom; row += lineheight) { /* Create a bounding box the size of one row of characters */ rect.pt1.y = row; rect.pt2.y = row + lineheight - 1; /* Clear the region */ ret = nx_fill(hwnd, &rect, g_bgstate.wcolor); if (ret < 0) { printf("nxbg_movedisplay: nx_fill failed: %d\n", errno); } /* Fill each character that might lie within in the bounding box */ for (i = 0; i < g_bgstate.nchars; i++) { bm = &g_bgstate.bm[i]; if (bm->pos.y <= rect.pt2.y && bm->pos.y + g_bgstate.fheight >= rect.pt1.y) { nxtext_fillchar(hwnd, &rect, &g_bgstate, g_bghfont, bm); } } } /* Finally, clear the bottom part of the display */ rect.pt1.y = bottom; rect.pt2.y = g_bgstate.wsize.h- 1; ret = nx_fill(hwnd, &rect, g_bgstate.wcolor); if (ret < 0) { printf("nxbg_movedisplay: nx_fill failed: %d\n", errno); } } /**************************************************************************** * Name: nxbg_scroll ****************************************************************************/ static inline void nxbg_scroll(NXWINDOW hwnd, int lineheight) { int i; int j; /* Adjust the vertical position of each character */ for (i = 0; i < g_bgstate.nchars; ) { FAR struct nxtext_bitmap_s *bm = &g_bgstate.bm[i]; /* Has any part of this character scrolled off the screen? */ if (bm->pos.y < lineheight + LINE_SEPARATION) { /* Yes... Delete the character by moving all of the data */ for (j = i; j < g_bgstate.nchars-1; j++) { memcpy(&g_bgstate.bm[j], &g_bgstate.bm[j+1], sizeof(struct nxtext_bitmap_s)); } /* Decrement the number of cached characters ('i' is not incremented * in this case because it already points to the next character) */ g_bgstate.nchars--; } /* No.. just decrement its vertical position (moving it "up" the * display by one line). */ else { bm->pos.y -= lineheight; /* We are keeping this one so increment to the next character */ i++; } } /* And move the next display position up by one line as well */ g_bgstate.fpos.y -= lineheight; /* Move the display in the range of 0-height up one lineheight. */ nxbg_movedisplay(hwnd, g_bgstate.fpos.y, lineheight); } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: nxbg_getstate * * Description: * Initialize the background window state structure. * ****************************************************************************/ FAR struct nxtext_state_s *nxbg_getstate(void) { FAR const struct nx_font_s *fontset; /* Initialize the color (used for redrawing the window) */ memset(&g_bgstate, 0, sizeof(struct nxtext_state_s)); g_bgstate.wcolor[0] = CONFIG_EXAMPLES_NXTEXT_BGCOLOR; g_bgstate.fcolor[0] = CONFIG_EXAMPLES_NXTEXT_BGFONTCOLOR; /* Get information about the font set being used and save this in the * state structure */ fontset = nxf_getfontset(g_bghfont); g_bgstate.fheight = fontset->mxheight; g_bgstate.fwidth = fontset->mxwidth; g_bgstate.spwidth = fontset->spwidth; /* Set up the text caches */ g_bgstate.maxchars = CONFIG_EXAMPLES_NXTEXT_BMCACHE; g_bgstate.maxglyphs = CONFIG_EXAMPLES_NXTEXT_GLCACHE; g_bgstate.bm = g_bgbm; g_bgstate.glyph = g_bgglyph; /* Set the first display position */ nxtext_home(&g_bgstate); return &g_bgstate; } /**************************************************************************** * Name: nxbg_write * * Description: * Put a sequence of bytes in the window. * ****************************************************************************/ void nxbg_write(NXWINDOW hwnd, FAR const uint8_t *buffer, size_t buflen) { int lineheight = (g_bgstate.fheight + LINE_SEPARATION); while (buflen-- > 0) { /* Will another character fit on this line? */ if (g_bgstate.fpos.x + g_bgstate.fwidth > g_bgstate.wsize.w) { /* No.. move to the next line */ nxtext_newline(&g_bgstate); /* If we were about to output a newline character, then don't */ if (*buffer == '\n') { buffer++; continue; } } /* Check if we need to scroll up (handling a corner case where * there may be more than one newline). */ while (g_bgstate.fpos.y >= g_bgstate.wsize.h - lineheight) { nxbg_scroll(hwnd, lineheight); } /* Finally, we can output the character */ nxtext_putc(hwnd, &g_bgstate, g_bghfont, (uint8_t)*buffer++); } }