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#include "eve.h"
#include "eve_text.h"
#define TEXT_ATTR 0x0A
#define TEXT_CRSR 0x02DB
#define LINE_IDX_ADD(l1,l2,s) (((((l1) + (l2)) % (s)) + (s)) % (s))
#define LINE_IDX_SUB(l1,l2,s) (((((l1) - (l2)) % (s)) + (s)) % (s))
#define LINE_IDX_LTE(l1,l2,s,h) (LINE_IDX_SUB(l2,l1,s) <= (s) - (h))
#define LINE_IDX_DIFF(l1,l2,s) ((l1) > (l2) ? (l1) - (l2) : (s) - (l2) + (l1))
static void scroll1(EOSText *box) {
box->line_idx = (box->line_idx + 1) % box->buf_line_h;
eos_eve_cmd(CMD_MEMSET, "www", box->buf_addr + box->buf_idx, 0x0, box->w * 2);
eos_eve_cmd_exec(1);
box->dirty = 1;
}
void eos_text_init(EOSText *box, int x, int y, int w, int h, double scale_x, double scale_y, uint8_t tag, int buf_line_h, uint32_t mem_addr, uint32_t *mem_next) {
box->x = x;
box->y = y;
box->w = w;
box->h = h;
box->tag = tag;
box->transform_a = 256/scale_x;
box->transform_e = 256/scale_y;
box->ch_w = scale_x * 8;
box->ch_h = scale_y * 16;
box->dl_size = 17;
box->buf_addr = mem_addr;
box->buf_line_h = buf_line_h;
box->buf_idx = 0;
box->line_idx = 0;
if (box->transform_a != 256) {
box->dl_size += 1;
}
if (box->transform_e != 256) {
box->dl_size += 1;
}
eos_touch_set_evt(tag, EOS_TOUCH_ETYPE_DRAG);
eos_eve_cmd(CMD_MEMSET, "www", mem_addr, 0x0, w * 2 * buf_line_h);
eos_eve_cmd_exec(1);
eos_text_update(box, -1);
*mem_next = box->buf_addr + box->w * 2 * box->buf_line_h + box->dl_size * 4;
}
void eos_text_draw(EOSText *box, uint8_t tag0, int touch_idx) {
static int y0;
static int line_idx = -1;
static int line_idx_last;
uint8_t evt;
EOSTouch *t = eos_touch_evt(tag0, touch_idx, box->tag, box->tag, &evt);
if (t && evt) {
if (evt & EOS_TOUCH_ETYPE_DOWN) {
y0 = t->y;
if (line_idx < 0) {
line_idx = box->line_idx;
line_idx_last = line_idx;
}
}
if (evt & EOS_TOUCH_ETYPE_UP) {
line_idx = line_idx_last;
}
if (evt & EOS_TOUCH_ETYPE_DRAG) {
int _line_idx = LINE_IDX_ADD(line_idx, (y0 - t->y) / box->ch_h, box->buf_line_h);
if (LINE_IDX_LTE(_line_idx, box->line_idx, box->buf_line_h, box->h)) {
eos_text_update(box, _line_idx);
line_idx_last = _line_idx;
}
}
} else if (line_idx >= 0) {
line_idx = -1;
box->dirty = 1;
}
if (box->dirty) {
eos_text_update(box, -1);
box->dirty = 0;
}
eos_eve_cmd(CMD_APPEND, "ww", box->buf_addr + box->w * 2 * box->buf_line_h, box->dl_size * 4);
}
void eos_text_update(EOSText *box, int line_idx) {
int text_h1;
int text_h2;
if (line_idx < 0) line_idx = box->line_idx;
if (line_idx + box->h > box->buf_line_h) {
text_h1 = box->buf_line_h - line_idx;
text_h2 = box->h - text_h1;
} else {
text_h1 = box->h;
text_h2 = 0;
}
eos_eve_dl_start(box->buf_addr + box->w * 2 * box->buf_line_h);
eos_eve_dl_write(SAVE_CONTEXT());
eos_eve_dl_write(BEGIN(EVE_BITMAPS));
eos_eve_dl_write(TAG(box->tag));
eos_eve_dl_write(VERTEX_FORMAT(0));
eos_eve_dl_write(BITMAP_HANDLE(15));
if (box->transform_a != 256) {
eos_eve_dl_write(BITMAP_TRANSFORM_A(box->transform_a));
}
if (box->transform_e != 256) {
eos_eve_dl_write(BITMAP_TRANSFORM_E(box->transform_e));
}
eos_eve_dl_write(BITMAP_SOURCE(box->buf_addr + line_idx * box->w * 2));
eos_eve_dl_write(BITMAP_LAYOUT(EVE_TEXTVGA, box->w * 2, text_h1));
eos_eve_dl_write(BITMAP_SIZE(EVE_NEAREST, EVE_BORDER, EVE_BORDER, box->w * box->ch_w, text_h1 * box->ch_h));
eos_eve_dl_write(BITMAP_SIZE_H(box->w * box->ch_w, text_h1 * box->ch_h));
eos_eve_dl_write(VERTEX2F(box->x, box->y));
if (text_h2) {
eos_eve_dl_write(BITMAP_SOURCE(box->buf_addr));
eos_eve_dl_write(BITMAP_LAYOUT(EVE_TEXTVGA, box->w * 2, text_h2));
eos_eve_dl_write(BITMAP_SIZE(EVE_NEAREST, EVE_BORDER, EVE_BORDER, box->w * box->ch_w, text_h2 * box->ch_h));
eos_eve_dl_write(BITMAP_SIZE_H(box->w * box->ch_w, text_h2 * box->ch_h));
eos_eve_dl_write(VERTEX2F(box->x, box->y + text_h1 * box->ch_h));
} else {
eos_eve_dl_write(NOP());
eos_eve_dl_write(NOP());
eos_eve_dl_write(NOP());
eos_eve_dl_write(NOP());
eos_eve_dl_write(NOP());
}
eos_eve_dl_write(END());
eos_eve_dl_write(RESTORE_CONTEXT());
}
void eos_text_putc(EOSText *box, int c) {
int line_c, line_n;
switch (c) {
case '\b':
eos_text_backspace(box);
break;
case '\r':
case '\n':
eos_text_newline(box);
break;
default:
line_c = box->buf_idx / 2 / box->w;
eos_eve_write16(box->buf_addr + box->buf_idx, 0x0200 | (c & 0xff));
box->buf_idx = (box->buf_idx + 2) % (box->buf_line_h * box->w * 2);
eos_eve_write16(box->buf_addr + box->buf_idx, TEXT_CRSR);
line_n = box->buf_idx / 2 / box->w;
if ((line_c != line_n) && (LINE_IDX_DIFF(line_n, box->line_idx, box->buf_line_h) == box->h)) scroll1(box);
break;
}
}
void eos_text_newline(EOSText *box) {
int line = (box->buf_idx / 2 / box->w + 1) % box->buf_line_h;
eos_eve_write16(box->buf_addr + box->buf_idx, 0);
box->buf_idx = line * box->w * 2;
if (LINE_IDX_DIFF(line, box->line_idx, box->buf_line_h) == box->h) scroll1(box);
eos_eve_write16(box->buf_addr + box->buf_idx, TEXT_CRSR);
}
void eos_text_backspace(EOSText *box) {
uint16_t c;
eos_eve_write16(box->buf_addr + box->buf_idx, 0);
box->buf_idx = (box->buf_idx - 2) % (box->buf_line_h * box->w * 2);
if (eos_eve_read16(box->buf_addr + box->buf_idx) == 0) {
box->buf_idx = (box->buf_idx + 2) % (box->buf_line_h * box->w * 2);
}
eos_eve_write16(box->buf_addr + box->buf_idx, TEXT_CRSR);
}
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