void ITextRenderer::reconstruct(unsigned int ID, bool rescanStr) {
MUTEXLIB::unique_lock<MUTEXLIB::recursive_mutex> lock(SpriteMutex);
if (SpriteData.size() <= ID) SpriteData.resize(ID + 1, std::vector<SpriteAttr*>()); // 配列の拡張
if ((!SpriteData[ID].empty()) && rescanStr) deleteSprite(ID); // 既に存在した場合
if (!StringData[ID]) /* ぬるぽ */
return; /* ガッ */
float chrAdvance = (FontWidth() - FontPadding() * 2) * StringData[ID]->scale * StringData[ID]->width;
float cursorPos = 0;
if (rescanStr) {
for (const auto& k : StringData[ID]->str) {
SpriteData[ID].push_back(new SpriteAttr);
SpriteData[ID].back()->isFullWidth = fontmap->map(k).first;
SpriteData[ID].back()->chr_id = fontmap->map(k).second;
spriteRecalc(ID, SpriteData[ID].back(), chrAdvance, cursorPos);
if (SpriteData[ID].back()->isFullWidth) cursorPos += 1.0f;
else cursorPos += .5f;
}
} else {
for (const auto& k : SpriteData[ID]) {
spriteRecalc(ID, k, chrAdvance, cursorPos);
if (k->isFullWidth) cursorPos += 1.0f;
else cursorPos += .5f;
}
}
}
/* レンダリング */
void ITextRenderer::Render() {
MUTEXLIB::unique_lock<MUTEXLIB::recursive_mutex> lock(SpriteMutex);
for (const auto& i : SpriteData) {
for (const auto& k : i) {
if (!k) continue;
RECT rect = {
static_cast<int32_t>((k->chr_id % FontCols()) * FontWidth()),
static_cast<int32_t>((k->chr_id / FontCols()) * FontBaseSize()),
static_cast<int32_t>((k->chr_id % FontCols() + 1) * FontWidth()),
static_cast<int32_t>((k->chr_id / FontCols() + 1) * FontBaseSize()),
};
SpriteRenderer::instantiate(myDevice)->ShowSprite(
font, k->X, k->Y, FontWidth(), FontBaseSize(),
k->color, &rect, 0, 0, &(k->matrix));
}
}
}
/* Resize the text window for a terminal screen, modifying the
* appropriate WM_SIZE_HINTS and taking advantage of bit gravity.
*/
void
DoResizeScreen(XtermWidget xw)
{
TScreen *screen = TScreenOf(xw);
int border = 2 * screen->border;
int min_wide = border + screen->fullVwin.sb_info.width;
int min_high = border;
XtGeometryResult geomreqresult;
Dimension reqWidth, reqHeight, repWidth, repHeight;
#ifndef NO_ACTIVE_ICON
VTwin *saveWin = WhichVWin(screen);
/* all units here want to be in the normal font units */
WhichVWin(screen) = &screen->fullVwin;
#endif /* NO_ACTIVE_ICON */
/*
* I'm going to try to explain, as I understand it, why we
* have to do XGetWMNormalHints and XSetWMNormalHints here,
* although I can't guarantee that I've got it right.
*
* In a correctly written toolkit program, the Shell widget
* parses the user supplied geometry argument. However,
* because of the way xterm does things, the VT100 widget does
* the parsing of the geometry option, not the Shell widget.
* The result of this is that the Shell widget doesn't set the
* correct window manager hints, and doesn't know that the
* user has specified a geometry.
*
* The XtVaSetValues call below tells the Shell widget to
* change its hints. However, since it's confused about the
* hints to begin with, it doesn't get them all right when it
* does the SetValues -- it undoes some of what the VT100
* widget did when it originally set the hints.
*
* To fix this, we do the following:
*
* 1. Get the sizehints directly from the window, going around
* the (confused) shell widget.
* 2. Call XtVaSetValues to let the shell widget know which
* hints have changed. Note that this may not even be
* necessary, since we're going to right ahead after that
* and set the hints ourselves, but it's good to put it
* here anyway, so that when we finally do fix the code so
* that the Shell does the right thing with hints, we
* already have the XtVaSetValues in place.
* 3. We set the sizehints directly, this fixing up whatever
* damage was done by the Shell widget during the
* XtVaSetValues.
*
* Gross, huh?
*
* The correct fix is to redo VTRealize, VTInitialize and
* VTSetValues so that font processing happens early enough to
* give back responsibility for the size hints to the Shell.
*
* Someday, we hope to have time to do this. Someday, we hope
* to have time to completely rewrite xterm.
*/
TRACE(("DoResizeScreen\n"));
#if 1 /* ndef nothack */
/*
* NOTE: the hints and the XtVaSetValues() must match.
*/
TRACE(("%s@%d -- ", __FILE__, __LINE__));
TRACE_WM_HINTS(xw);
getXtermSizeHints(xw);
xtermSizeHints(xw, ScrollbarWidth(screen));
/* These are obsolete, but old clients may use them */
xw->hints.width = MaxCols(screen) * FontWidth(screen) + xw->hints.min_width;
xw->hints.height = MaxRows(screen) * FontHeight(screen) + xw->hints.min_height;
#if OPT_MAXIMIZE
/* assure single-increment resize for fullscreen */
if (xw->work.ewmh[0].mode) {
xw->hints.width_inc = 1;
xw->hints.height_inc = 1;
}
#endif /* OPT_MAXIMIZE */
#endif
XSetWMNormalHints(screen->display, VShellWindow(xw), &xw->hints);
reqWidth = (Dimension) (MaxCols(screen) * FontWidth(screen) + min_wide);
reqHeight = (Dimension) (MaxRows(screen) * FontHeight(screen) + min_high);
#if OPT_MAXIMIZE
/* compensate for fullscreen mode */
if (xw->work.ewmh[0].mode) {
Screen *xscreen = DefaultScreenOfDisplay(xw->screen.display);
reqWidth = (Dimension) WidthOfScreen(xscreen);
reqHeight = (Dimension) HeightOfScreen(xscreen);
ScreenResize(xw, reqWidth, reqHeight, &xw->flags);
}
#endif /* OPT_MAXIMIZE */
TRACE(("...requesting screensize chars %dx%d, pixels %dx%d\n",
MaxRows(screen),
MaxCols(screen),
reqHeight, reqWidth));
geomreqresult = REQ_RESIZE((Widget) xw, reqWidth, reqHeight,
&repWidth, &repHeight);
if (geomreqresult == XtGeometryAlmost) {
TRACE(("...almost, retry screensize %dx%d\n", repHeight, repWidth));
geomreqresult = REQ_RESIZE((Widget) xw, repWidth,
repHeight, NULL, NULL);
}
if (geomreqresult != XtGeometryYes) {
/* The resize wasn't successful, so we might need to adjust
our idea of how large the screen is. */
TRACE(("...still no (%d) - resize the core-class\n", geomreqresult));
xw->core.widget_class->core_class.resize((Widget) xw);
}
#if 1 /* ndef nothack */
/*
* XtMakeResizeRequest() has the undesirable side-effect of clearing
* the window manager's hints, even on a failed request. This would
* presumably be fixed if the shell did its own work.
*/
if (xw->hints.flags
&& repHeight
&& repWidth) {
xw->hints.height = repHeight;
xw->hints.width = repWidth;
TRACE_HINTS(&xw->hints);
XSetWMNormalHints(screen->display, VShellWindow(xw), &xw->hints);
}
#endif
XSync(screen->display, False); /* synchronize */
if (xtermAppPending())
xevents();
#ifndef NO_ACTIVE_ICON
WhichVWin(screen) = saveWin;
#endif /* NO_ACTIVE_ICON */
}
unsigned ITextRenderer::strWidthByPix(const std::string& str) {
return strWidthByCols(str) * (FontWidth() - FontPadding() * 2) / 2;
}
/*
* Interpret sixel graphics sequences.
*
* Resources:
* http://en.wikipedia.org/wiki/Sixel
* http://vt100.net/docs/vt3xx-gp/chapter14.html
* ftp://ftp.cs.utk.edu/pub/shuford/terminal/sixel_graphics_news.txt
* ftp://ftp.cs.utk.edu/pub/shuford/terminal/all_about_sixels.txt
*/
void
parse_sixel(XtermWidget xw, ANSI *params, char const *string)
{
TScreen *screen = TScreenOf(xw);
Graphic *graphic;
SixelContext context;
Char ch;
switch (screen->terminal_id) {
case 240:
case 241:
case 330:
case 340:
context.aspect_vertical = 2;
context.aspect_horizontal = 1;
break;
case 382:
context.aspect_vertical = 1;
context.aspect_horizontal = 1;
break;
default:
context.aspect_vertical = 2;
context.aspect_horizontal = 1;
break;
}
context.declared_width = 0;
context.declared_height = 0;
context.row = 0;
context.col = 0;
/* default isn't white on the VT240, but not sure what it is */
context.current_register = 3; /* FIXME: using green, but not sure what it should be */
if (xw->keyboard.flags & MODE_DECSDM) {
TRACE(("sixel scrolling enabled: inline positioning for graphic at %d,%d\n",
screen->cur_row, screen->cur_col));
graphic = get_new_graphic(xw, screen->cur_row, screen->cur_col, 0U);
} else {
TRACE(("sixel scrolling disabled: inline positioning for graphic at %d,%d\n",
0, 0));
graphic = get_new_graphic(xw, 0, 0, 0U);
}
{
int Pmacro = params->a_param[0];
int Pbgmode = params->a_param[1];
int Phgrid = params->a_param[2];
int Pan = params->a_param[3];
int Pad = params->a_param[4];
int Ph = params->a_param[5];
int Pv = params->a_param[6];
(void) Phgrid;
TRACE(("sixel bitmap graphics sequence: params=%d (Pmacro=%d Pbgmode=%d Phgrid=%d) scroll_amt=%d\n",
params->a_nparam,
Pmacro,
Pbgmode,
Phgrid,
screen->scroll_amt));
switch (params->a_nparam) {
case 7:
if (Pan == 0 || Pad == 0) {
TRACE(("DATA_ERROR: invalid raster ratio %d/%d\n", Pan, Pad));
return;
}
context.aspect_vertical = Pan;
context.aspect_horizontal = Pad;
if (Ph == 0 || Pv == 0) {
TRACE(("DATA_ERROR: raster image dimensions are invalid %dx%d\n",
Ph, Pv));
return;
}
if (Ph > graphic->max_width || Pv > graphic->max_height) {
TRACE(("DATA_ERROR: raster image dimensions are too large %dx%d\n",
Ph, Pv));
return;
}
context.declared_width = Ph;
context.declared_height = Pv;
if (context.declared_width > graphic->actual_width) {
graphic->actual_width = context.declared_width;
}
if (context.declared_height > graphic->actual_height) {
graphic->actual_height = context.declared_height;
}
break;
case 3:
case 2:
case 1:
switch (Pmacro) {
case 0:
/* keep default aspect settings */
break;
case 1:
case 5:
case 6:
context.aspect_vertical = 2;
context.aspect_horizontal = 1;
break;
case 2:
context.aspect_vertical = 5;
context.aspect_horizontal = 1;
break;
case 3:
case 4:
context.aspect_vertical = 3;
context.aspect_horizontal = 1;
break;
case 7:
case 8:
case 9:
context.aspect_vertical = 1;
context.aspect_horizontal = 1;
break;
default:
TRACE(("DATA_ERROR: unknown sixel macro mode parameter\n"));
return;
}
break;
case 0:
break;
default:
TRACE(("DATA_ERROR: unexpected parameter count (found %d)\n", params->a_nparam));
return;
}
if (Pbgmode == 1) {
context.background = COLOR_HOLE;
} else {
/* FIXME: is the default background register always zero? what about in light background mode? */
context.background = 0;
}
/* Ignore the grid parameter because it seems only printers paid attention to it.
* The VT3xx was always 0.0195 cm.
*/
}
update_sixel_aspect(&context, graphic);
for (;;) {
ch = CharOf(*string);
if (ch == '\0')
break;
if (ch >= 0x3f && ch <= 0x7e) {
int sixel = ch - 0x3f;
TRACE(("sixel=%x (%c)\n", sixel, (char) ch));
if (!graphic->valid) {
init_sixel_background(graphic, &context);
graphic->valid = 1;
}
set_sixel(graphic, &context, sixel);
context.col++;
} else if (ch == '$') { /* DECGCR */
/* ignore DECCRNLM in sixel mode */
TRACE(("sixel CR\n"));
context.col = 0;
} else if (ch == '-') { /* DECGNL */
int scroll_lines;
TRACE(("sixel NL\n"));
scroll_lines = 0;
while (graphic->charrow - scroll_lines +
(((context.row + 6) * graphic->pixh
+ FontHeight(screen) - 1)
/ FontHeight(screen)) > screen->bot_marg) {
scroll_lines++;
}
context.col = 0;
context.row += 6;
/* If we hit the bottom margin on the graphics page (well, we just use the
* text margin for now), the behavior is to either scroll or to discard
* the remainder of the graphic depending on this setting.
*/
if (scroll_lines > 0) {
if (xw->keyboard.flags & MODE_DECSDM) {
Display *display = screen->display;
xtermScroll(xw, scroll_lines);
XSync(display, False);
TRACE(("graphic scrolled the screen %d lines. screen->scroll_amt=%d screen->topline=%d, now starting row is %d\n",
scroll_lines,
screen->scroll_amt,
screen->topline,
graphic->charrow));
} else {
break;
}
}
} else if (ch == '!') { /* DECGRI */
int Pcount;
const char *start;
int sixel;
int i;
start = ++string;
for (;;) {
ch = CharOf(*string);
if (ch != '0' &&
ch != '1' &&
ch != '2' &&
ch != '3' &&
ch != '4' &&
ch != '5' &&
ch != '6' &&
ch != '7' &&
ch != '8' &&
ch != '9' &&
ch != ' ' &&
ch != '\r' &&
ch != '\n')
break;
string++;
}
if (ch == '\0') {
TRACE(("DATA_ERROR: sixel data string terminated in the middle of a repeat operator\n"));
return;
}
if (string == start) {
TRACE(("DATA_ERROR: sixel data string contains a repeat operator with empty count\n"));
return;
}
Pcount = atoi(start);
sixel = ch - 0x3f;
TRACE(("sixel repeat operator: sixel=%d (%c), count=%d\n",
sixel, (char) ch, Pcount));
if (!graphic->valid) {
init_sixel_background(graphic, &context);
graphic->valid = 1;
}
for (i = 0; i < Pcount; i++) {
set_sixel(graphic, &context, sixel);
context.col++;
}
} else if (ch == '#') { /* DECGCI */
ANSI color_params;
int Pregister;
parse_prefixedtype_params(&color_params, &string);
Pregister = color_params.a_param[0];
if (Pregister >= (int) graphic->valid_registers) {
TRACE(("DATA_WARNING: sixel color operator uses out-of-range register %d\n", Pregister));
/* FIXME: supposedly the DEC terminals wrapped register indicies -- verify */
while (Pregister >= (int) graphic->valid_registers)
Pregister -= (int) graphic->valid_registers;
TRACE(("DATA_WARNING: converted to %d\n", Pregister));
}
if (color_params.a_nparam > 2 && color_params.a_nparam <= 5) {
int Pspace = color_params.a_param[1];
int Pc1 = color_params.a_param[2];
int Pc2 = color_params.a_param[3];
int Pc3 = color_params.a_param[4];
short r, g, b;
TRACE(("sixel set color register=%d space=%d color=[%d,%d,%d] (nparams=%d)\n",
Pregister, Pspace, Pc1, Pc2, Pc3, color_params.a_nparam));
switch (Pspace) {
case 1: /* HLS */
if (Pc1 > 360 || Pc2 > 100 || Pc3 > 100) {
TRACE(("DATA_ERROR: sixel set color operator uses out-of-range HLS color coordinates %d,%d,%d\n",
Pc1, Pc2, Pc3));
return;
}
hls2rgb(Pc1, Pc2, Pc3, &r, &g, &b);
break;
case 2: /* RGB */
if (Pc1 > 100 || Pc2 > 100 || Pc3 > 100) {
TRACE(("DATA_ERROR: sixel set color operator uses out-of-range RGB color coordinates %d,%d,%d\n",
Pc1, Pc2, Pc3));
return;
}
r = (short) Pc1;
g = (short) Pc2;
b = (short) Pc3;
break;
default: /* unknown */
TRACE(("DATA_ERROR: sixel set color operator uses unknown color space %d\n", Pspace));
return;
}
update_color_register(graphic,
(RegisterNum) Pregister,
r, g, b);
} else if (color_params.a_nparam == 1) {
TRACE(("sixel switch to color register=%d (nparams=%d)\n",
Pregister, color_params.a_nparam));
context.current_register = (RegisterNum) Pregister;
} else {
TRACE(("DATA_ERROR: sixel switch color operator with unexpected parameter count (nparams=%d)\n", color_params.a_nparam));
return;
}
continue;
} else if (ch == '"') /* DECGRA */ {
ANSI raster_params;
parse_prefixedtype_params(&raster_params, &string);
if (raster_params.a_nparam < 2) {
TRACE(("DATA_ERROR: sixel raster attribute operator with incomplete parameters (found %d, expected 2 or 4)\n", raster_params.a_nparam));
return;
} {
int Pan = raster_params.a_param[0];
int Pad = raster_params.a_param[1];
TRACE(("sixel raster attribute with h:w=%d:%d\n", Pan, Pad));
if (Pan == 0 || Pad == 0) {
TRACE(("DATA_ERROR: invalid raster ratio %d/%d\n", Pan, Pad));
return;
}
context.aspect_vertical = Pan;
context.aspect_horizontal = Pad;
update_sixel_aspect(&context, graphic);
}
if (raster_params.a_nparam >= 4) {
int Ph = raster_params.a_param[2];
int Pv = raster_params.a_param[3];
TRACE(("sixel raster attribute with h=%d v=%d\n", Ph, Pv));
if (Ph == 0 || Pv == 0) {
TRACE(("DATA_ERROR: raster image dimensions are invalid %dx%d\n",
Ph, Pv));
return;
}
if (Ph > graphic->max_width || Pv > graphic->max_height) {
TRACE(("DATA_ERROR: raster image dimensions are too large %dx%d\n",
Ph, Pv));
return;
}
context.declared_width = Ph;
context.declared_height = Pv;
if (context.declared_width > graphic->actual_width) {
graphic->actual_width = context.declared_width;
}
if (context.declared_height > graphic->actual_height) {
graphic->actual_height = context.declared_height;
}
}
continue;
} else if (ch == ' ' || ch == '\r' || ch == '\n') {
/* EMPTY */ ;
} else {
TRACE(("DATA_ERROR: unknown sixel command %04x (%c)\n",
(int) ch, ch));
}
string++;
}
/* update the screen */
if (screen->scroll_amt)
FlushScroll(xw);
if (xw->keyboard.flags & MODE_DECSDM) {
int new_row, new_col;
if (screen->sixel_scrolls_right) {
new_row = (graphic->charrow
+ (((graphic->actual_height * graphic->pixh)
+ FontHeight(screen) - 1)
/ FontHeight(screen))
- 1);
new_col = (graphic->charcol
+ (((graphic->actual_width * graphic->pixw)
+ FontWidth(screen) - 1)
/ FontWidth(screen)));
} else {
/* FIXME: At least of the VT382 the vertical position appears to be
* truncated (rounded toward zero after converting to character row.
* This code rounds up, which seems more useful, but it would be
* better to be compatible. Verify this is true on a VT3[34]0 as
* well.
*/
new_row = (graphic->charrow
+ (((graphic->actual_height * graphic->pixh)
+ FontHeight(screen) - 1)
/ FontHeight(screen)));
new_col = 0;
}
TRACE(("setting text position after %dx%d graphic starting on row=%d col=%d: cursor new_row=%d new_col=%d\n",
graphic->actual_width * graphic->pixw,
graphic->actual_height * graphic->pixh,
graphic->charrow,
graphic->charcol,
new_row, new_col));
if (new_col > screen->rgt_marg) {
new_col = screen->lft_marg;
new_row++;
TRACE(("column past left margin, overriding to row=%d col=%d\n",
new_row, new_col));
}
while (new_row > screen->bot_marg) {
xtermScroll(xw, 1);
new_row--;
TRACE(("bottom row was past screen. new start row=%d, cursor row=%d\n",
graphic->charrow, new_row));
}
if (new_row < 0) {
TRACE(("new row is going to be negative (%d)!", new_row)); /* FIXME: this was triggering, now it isn't */
goto finis;
}
set_cur_row(screen, new_row);
set_cur_col(screen, new_col <= screen->rgt_marg ? new_col : screen->rgt_marg);
}
finis:
refresh_modified_displayed_graphics(screen);
TRACE(("DONE successfully parsed sixel data\n"));
dump_graphic(graphic);
}
static void ResizeScreen(XtermWidget xw,int min_width,int min_height )
{
register TScreen *screen = &xw->screen;
#ifndef nothack
XSizeHints sizehints;
long supp;
#endif
XtGeometryResult geomreqresult;
Dimension reqWidth, reqHeight, repWidth, repHeight;
/*
* I'm going to try to explain, as I understand it, why we
* have to do XGetWMNormalHints and XSetWMNormalHints here,
* although I can't guarantee that I've got it right.
*
* In a correctly written toolkit program, the Shell widget
* parses the user supplied geometry argument. However,
* because of the way xterm does things, the VT100 widget does
* the parsing of the geometry option, not the Shell widget.
* The result of this is that the Shell widget doesn't set the
* correct window manager hints, and doesn't know that the
* user has specified a geometry.
*
* The XtVaSetValues call below tells the Shell widget to
* change its hints. However, since it's confused about the
* hints to begin with, it doesn't get them all right when it
* does the SetValues -- it undoes some of what the VT100
* widget did when it originally set the hints.
*
* To fix this, we do the following:
*
* 1. Get the sizehints directly from the window, going around
* the (confused) shell widget.
* 2. Call XtVaSetValues to let the shell widget know which
* hints have changed. Note that this may not even be
* necessary, since we're going to right ahead after that
* and set the hints ourselves, but it's good to put it
* here anyway, so that when we finally do fix the code so
* that the Shell does the right thing with hints, we
* already have the XtVaSetValues in place.
* 3. We set the sizehints directly, this fixing up whatever
* damage was done by the Shell widget during the
* XtVaSetValues.
*
* Gross, huh?
*
* The correct fix is to redo VTRealize, VTInitialize and
* VTSetValues so that font processing happens early enough to
* give back responsibility for the size hints to the Shell.
*
* Someday, we hope to have time to do this. Someday, we hope
* to have time to completely rewrite xterm.
*/
#ifndef nothack
/*
* NOTE: If you change the way any of the hints are calculated
* below, make sure you change the calculation both in the
* sizehints assignments and in the XtVaSetValues.
*/
if (! XGetWMNormalHints(screen->display, XtWindow(XtParent(xw)),
&sizehints, &supp))
sizehints.flags = 0;
sizehints.base_width = min_width;
sizehints.base_height = min_height;
sizehints.width_inc = FontWidth(screen);
sizehints.height_inc = FontHeight(screen);
sizehints.min_width = sizehints.base_width + sizehints.width_inc;
sizehints.min_height = sizehints.base_height + sizehints.height_inc;
sizehints.flags |= (PBaseSize|PMinSize|PResizeInc);
/* These are obsolete, but old clients may use them */
sizehints.width = (screen->max_col + 1) * FontWidth(screen)
+ min_width;
sizehints.height = (screen->max_row + 1) * FontHeight(screen)
+ min_height;
#endif
/*
* Note: width and height are not set here because they are
* obsolete.
*/
XtVaSetValues(XtParent(xw),
XtNbaseWidth, min_width,
XtNbaseHeight, min_height,
XtNwidthInc, FontWidth(screen),
XtNheightInc, FontHeight(screen),
XtNminWidth, min_width + FontWidth(screen),
XtNminHeight, min_height + FontHeight(screen),
NULL);
reqWidth = (screen->max_col + 1) * FontWidth(screen) + min_width;
reqHeight = FontHeight(screen) * (screen->max_row + 1) + min_height;
geomreqresult = XtMakeResizeRequest ((Widget)xw, reqWidth, reqHeight,
&repWidth, &repHeight);
if (geomreqresult == XtGeometryAlmost)
{
geomreqresult = XtMakeResizeRequest ((Widget)xw, repWidth,
repHeight, NULL, NULL);
}
#ifndef nothack
XSetWMNormalHints(screen->display, XtWindow(XtParent(xw)), &sizehints);
#endif
}
/*
// - ScrollDisplay(const char *s,uint8_t speed)
// - Scrolls the string referenced in the pointer
// - '*s' from right to left at a given 'speed'.
// - The text is scrolled off screen leaving
// - the disply blank when finished
// - Returns - nothing
*/
void ScrollDisplay(char *s,uint8_t speed)
{
LEDArrayBlank();
int8_t offset = 0 , next_offset = 0;
uint8_t is_started = 0;
uint8_t y=0;
char x=' ';
uint8_t i=0;
if(speed==0)
speed=90;
// begin loop and continue until nul character at end of string
while(s[i] != '\0'){
// have we read a character?
if(is_started) {
// if so, place and shift the character until it is clear of column (COLS-1)
while(next_offset>(COLS-1)){
delay_ms(speed);
// shift the display one place
LEDArrayLeftShift();
// check the end of the currently displayed characters if it's greater than zero, decrement
// both the offset (character display position), and next_offset(character end position)
if(next_offset > 0) {
offset -= 1;
next_offset -= 1;
}
// display the character at the new position
FontDisplay(x, offset);
}
}else{
// if not, set offset to # of columns -1 ((COLS-1))
offset = COLS-1;
}
// read the next character in the string
x = s[i++];
// if we have already started, set the current display position to where the last character ended
if(is_started)
offset = next_offset;
// display the character
FontDisplay(x, offset);
// create the new character end position
next_offset = offset + FontWidth(x)+1;
// set flag to show we have been through the loop
is_started = 1;
if( KEY1 )
return;
}
// Process the last character. This is neccessary since the while bails as soon as it reads
// the null character. At that point, the last read character has not yet shifted into full
// view. The following while loop shifts the final string character into full view.
while(next_offset>(COLS-1)){
delay_ms(speed);
LEDArrayLeftShift();
if(next_offset > 0) {
offset -= 1;
next_offset -= 1;
}
FontDisplay(x, offset);
if( KEY1 )
return;
}
delay_ms(speed);
// this final loop shifts the display all the way off.
for(y=0;y<COLS;y++){
LEDArrayLeftShift();
delay_ms(speed);
if( KEY1 )
return;
}
return;
}
