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text scrolling sort of starting to work

Browse source 
but it is slow and the font has artefacts, probably because a fixed
width is being used
This commit is contained in:
Thomas Saunders 2012-06-22 21:41:24 +01:00
parent d0e3a0636e
commit 5c7d3819be
2 changed files with 65 additions and 39 deletions
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102
console.c
View file

@ -87,8 +87,8 @@ msg_t lcdConsoleInit(GLCDConsole *console, uint16_t x0, uint16_t y0, uint16_t x1
console->fx = *(ptr++);
/* calculate the size of the console in characters */
console->sx = (x1-x0)/console->fx;
console->sy = (y1-y0)/console->fy;
console->sx = (x1-x0);
console->sy = (y1-y0);
console->cx = 0;
console->cy = 0;
@ -96,7 +96,7 @@ msg_t lcdConsoleInit(GLCDConsole *console, uint16_t x0, uint16_t y0, uint16_t x1
console->y0 = y0;
console->buf = buffer;
console->bidx = 0;
console->wptr = 0;
console->blen = console->sx*console->sy;
console->bstrt = 0;
@ -112,56 +112,82 @@ msg_t lcdConsoleUpdate(GLCDConsole *console) {
}
msg_t lcdConsolePut(GLCDConsole *console, char c) {
uint8_t width = console->fx;
uint16_t i;
uint16_t s = console->wptr;
bool_t redraw = FALSE;
if(console->full) {
return RDY_RESET;
}
bool_t redraw = FALSE;
/* write character to current position in buffer */
console->buf[console->bidx++] = c;
/* write character to current position in buffer and update wptr */
console->buf[console->wptr] = c;
if(console->bidx == console->blen) {
if(++console->wptr == console->blen) {
/* wrap around to the beginning */
console->bidx = 0;
console->wptr = 0;
}
if(c == '\n') {
console->cx = 0;
console->cy++;
redraw = TRUE;
} else if(c == '\r') {
console->cx = 0;
} else {
console->cx++;
}
lcdSetFont(console->font);
lcdSetFontTransparency(solid);
/* keep looping until we've finished writing
* we may write more than one character if the console needs to be re-drawn
* at the end of the loop leave the cursor set to the position for the next character
* checks to see if this is out of range will be performed at the start of that character
*/
do {
if(console->buf[s] == '\n') {
console->cx = 0;
console->cy += console->fy;
} else if(console->buf[s] == '\r') {
/* TODO: work backwards through the buffer to the start of the current line */
//console->cx = 0;
} else {
if(console->cx >= console->sx) {
console->cx = 0;
console->cy += console->fy;
}
if(console->cx > console->sx) {
/* character has extended beyond end of line */
redraw = TRUE;
}
if((console->cy + console->fy) >= console->sy) {
/* we've gone beyond the end of the console */
//console->full = TRUE;
//return RDY_RESET;
/* start at beginning of buffer and remove the first line */
if(redraw && console->cy == console->sy) {
/* increment s from bstrt until it has been incremented more than
* console->sx or finds a new line */
s = console->bstrt;
console->cx = 0;
/* we've gone past the end of the console */
console->full = TRUE;
return RDY_RESET;
/* start at beginning of buffer and remove the first line */
uint16_t i;
while((console->cx <= console->sx) && (console->buf[s % console->blen] != '\n')) {
s++;
/* TODO: increment based on the width of the character at s */
/* TODO: this doesn't handle carriage return */
console->cx += width;
}
/* increment i from bstrt until it has been incremented more than console->sx or finds a new line */
for(i = console->bstrt; ((i - console->bstrt) < console->sx) && (console->buf[i % console->sx] != '\n'); i++);
/* update bstrt to the new start point of the console */
console->bstrt = s;
/* update bstrt to the new start point of the console */
console->bstrt = i;
} else {
/* just draw the character at the current position */
lcdMoveCursor(console->x0 + console->cx*console->fx, console->y0 + console->cy*console->fy,
console->color, console->bkcolor);
/* reset the cursor */
console->cx = 0;
console->cy = 0;
}
lcdMoveCursor(console->x0 + console->cx, console->y0 + console->cy,
console->color, console->bkcolor);
lcdDrawChar(console->buf[s]);
/* update cursor */
console->cx += width;
}
/* finally increment index */
if(++s == console->blen)
s = 0;
} while(s != console->wptr);
lcdSetFont(console->font);
lcdDrawChar(c);
}
}
msg_t lcdConsoleWrite(GLCDConsole *console, uint8_t *bp, size_t n) {

2
console.h
View file

@ -48,7 +48,7 @@ struct GLCDConsole {
/* font size in pixels */
uint8_t fx,fy;
/* buffer index */
uint16_t bidx, blen, bstrt;
uint16_t wptr, blen, bstrt;
bool_t full;
};