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#include <stdlib.h>
#include <string.h>
#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) + (l1) - (l2))
static void scroll1(EVEText *box) {
box->line0 = (box->line0 + 1) % box->line_size;
eve_cmd(CMD_MEMSET, "www", box->mem_addr + box->ch_idx, 0x0, box->w * 2);
eve_cmd_exec(1);
eve_text_update(box);
box->dirty = 1;
}
void eve_text_init(EVEText *box, EVERect *g, uint16_t w, uint16_t h, uint16_t line_size, uint32_t mem_addr, uint32_t *mem_next) {
double scale_x, scale_y;
if (g->w == 0) {
g->w = w * 8;
}
if (g->h == 0) {
g->h = h * 16;
}
scale_x = (double)g->w / (w * 8);
scale_y = (double)g->h / (h * 16);
box->g = *g;
box->w = w;
box->h = h;
box->tag = EVE_TAG_NOTAG;
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 = 14;
box->mem_addr = mem_addr;
box->line_size = line_size;
box->line0 = 0;
box->line_top = -1;
box->line_top0 = -1;
box->ch_idx = 0;
if (box->transform_a != 256) {
box->dl_size += 1;
}
if (box->transform_e != 256) {
box->dl_size += 1;
}
eve_cmd(CMD_MEMSET, "www", mem_addr, 0x0, box->w * 2 * box->line_size);
eve_cmd_exec(1);
eve_text_update(box);
*mem_next = box->mem_addr + box->w * 2 * box->line_size + box->dl_size * 4;
}
void eve_text_update(EVEText *box) {
int text_h1;
int text_h2;
int line_top;
line_top = box->line_top >= 0 ? box->line_top : box->line0;
if (line_top + box->h > box->line_size) {
text_h1 = box->line_size - line_top;
text_h2 = box->h - text_h1;
} else {
text_h1 = box->h;
text_h2 = 0;
}
eve_dl_start(box->mem_addr + box->w * 2 * box->line_size, 1);
eve_dl_write(BEGIN(EVE_BITMAPS));
eve_dl_write(VERTEX_FORMAT(0));
eve_dl_write(BITMAP_HANDLE(15));
if (box->transform_a != 256) {
eve_dl_write(BITMAP_TRANSFORM_A(box->transform_a));
}
if (box->transform_e != 256) {
eve_dl_write(BITMAP_TRANSFORM_E(box->transform_e));
}
eve_dl_write(BITMAP_SOURCE(box->mem_addr + line_top * box->w * 2));
eve_dl_write(BITMAP_LAYOUT(EVE_TEXTVGA, box->w * 2, text_h1));
eve_dl_write(BITMAP_SIZE(EVE_NEAREST, EVE_BORDER, EVE_BORDER, box->w * box->ch_w, text_h1 * box->ch_h));
eve_dl_write(BITMAP_SIZE_H(box->w * box->ch_w, text_h1 * box->ch_h));
eve_dl_write(VERTEX2F(box->g.x, box->g.y));
if (text_h2) {
eve_dl_write(BITMAP_SOURCE(box->mem_addr));
eve_dl_write(BITMAP_LAYOUT(EVE_TEXTVGA, box->w * 2, text_h2));
eve_dl_write(BITMAP_SIZE(EVE_NEAREST, EVE_BORDER, EVE_BORDER, box->w * box->ch_w, text_h2 * box->ch_h));
eve_dl_write(BITMAP_SIZE_H(box->w * box->ch_w, text_h2 * box->ch_h));
eve_dl_write(VERTEX2F(box->g.x, box->g.y + text_h1 * box->ch_h));
} else {
eve_dl_write(NOP());
eve_dl_write(NOP());
eve_dl_write(NOP());
eve_dl_write(NOP());
eve_dl_write(NOP());
}
eve_dl_write(END());
eve_dl_end();
}
void eve_text_scroll0(EVEText *box) {
if (box->line_top >= 0) {
box->line_top = -1;
box->line_top0 = -1;
eve_text_update(box);
}
}
int eve_text_touch(EVEText *box, EVETouch *touch, uint16_t evt, uint8_t tag0) {
evt = eve_touch_evt(touch, evt, tag0, box->tag, 1);
if (touch && evt) {
if ((evt & EVE_TOUCH_ETYPE_TRACK_START) && (box->line_top < 0)) {
box->line_top = box->line0;
box->line_top0 = box->line0;
}
if ((evt & EVE_TOUCH_ETYPE_TRACK) && (box->line_top0 >=0)) {
int line = LINE_IDX_ADD(box->line_top0, (touch->y0 - touch->y) / box->ch_h, box->line_size);
if (LINE_IDX_LTE(line, box->line0, box->line_size, box->h)) {
box->line_top = line;
eve_text_update(box);
}
}
if (evt & EVE_TOUCH_ETYPE_TRACK_STOP) {
box->line_top0 = box->line_top;
}
return 1;
}
return 0;
}
uint8_t eve_text_draw(EVEText *box, uint8_t tag) {
eve_cmd_dl(SAVE_CONTEXT());
box->tag = tag;
if (tag != EVE_TAG_NOTAG) {
eve_cmd_dl(TAG(tag));
eve_touch_set_opt(tag, EVE_TOUCH_OPT_TRACK | EVE_TOUCH_OPT_TRACK_EXT_Y);
tag++;
}
eve_cmd(CMD_APPEND, "ww", box->mem_addr + box->w * 2 * box->line_size, box->dl_size * 4);
eve_cmd_dl(RESTORE_CONTEXT());
return tag;
}
void eve_text_putc(EVEText *box, int c) {
int line_c, line_n;
switch (c) {
case '\b':
eve_text_backspace(box);
break;
case '\r':
case '\n':
eve_text_newline(box);
break;
default:
line_c = box->ch_idx / 2 / box->w;
eve_write16(box->mem_addr + box->ch_idx, 0x0200 | (c & 0xff));
box->ch_idx = (box->ch_idx + 2) % (box->line_size * box->w * 2);
eve_write16(box->mem_addr + box->ch_idx, TEXT_CRSR);
line_n = box->ch_idx / 2 / box->w;
if ((line_c != line_n) && (LINE_IDX_DIFF(line_n, box->line0, box->line_size) == box->h)) scroll1(box);
break;
}
}
void eve_text_backspace(EVEText *box) {
uint16_t c;
eve_write16(box->mem_addr + box->ch_idx, 0);
box->ch_idx = (box->ch_idx - 2) % (box->line_size * box->w * 2);
if (eve_read16(box->mem_addr + box->ch_idx) == 0) {
box->ch_idx = (box->ch_idx + 2) % (box->line_size * box->w * 2);
}
eve_write16(box->mem_addr + box->ch_idx, TEXT_CRSR);
}
void eve_text_newline(EVEText *box) {
int line = (box->ch_idx / 2 / box->w + 1) % box->line_size;
eve_write16(box->mem_addr + box->ch_idx, 0);
box->ch_idx = line * box->w * 2;
if (LINE_IDX_DIFF(line, box->line0, box->line_size) == box->h) scroll1(box);
eve_write16(box->mem_addr + box->ch_idx, TEXT_CRSR);
}
void eve_text_puts(EVEText *box, char *s) {
while (*s) {
eve_text_putc(box, *s);
s++;
}
}
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