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#include "eve.h"
#include "eve_text.h"
static int _line_diff(EVETextBox *box, int line) {
if (line > box->line_idx) {
return line - box->line_idx;
} else {
return box->buf_line_h - box->line_idx + line;
}
}
static void _line_scroll(EVETextBox *box) {
box->line_idx = (box->line_idx + 1) % box->buf_line_h;
eos_eve_cmd(CMD_MEMSET, "www", EVE_RAM_G + box->buf_addr + box->buf_idx, 0x0, box->w * 2);
eos_eve_cmd_exec(1);
eos_eve_dl_start(box->dl_offset);
eos_eve_text_update(box);
eos_eve_dl_swap();
}
void eos_eve_text_init(EVETextBox *box, uint16_t buf_addr, int buf_line_h, int w, int h, int x, int y, uint8_t bitmap_handle) {
box->buf_addr = buf_addr;
box->buf_line_h = buf_line_h;
box->w = w;
box->h = h;
box->x = x;
box->y = y;
box->buf_idx = 0;
box->line_idx = 0;
box->dl_offset = 0;
box->bitmap_handle = bitmap_handle;
eos_eve_cmd(CMD_MEMSET, "www", EVE_RAM_G + buf_addr, 0x0, w * 2 * buf_line_h);
eos_eve_cmd_exec(1);
}
void eos_eve_text_update(EVETextBox *box) {
int text_h1;
int text_h2;
eos_eve_dl_write(BITMAP_HANDLE(box->bitmap_handle));
eos_eve_dl_write(BITMAP_SOURCE(box->buf_addr + box->line_idx * box->w * 2));
if (box->line_idx + box->h > box->buf_line_h) {
text_h1 = box->buf_line_h - box->line_idx;
text_h2 = box->h - text_h1;
} else {
text_h1 = box->h;
text_h2 = 0;
}
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 * 8, text_h1 * 16));
if (text_h2) {
eos_eve_dl_write(BITMAP_HANDLE(box->bitmap_handle+1));
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 * 8, text_h2 * 16));
} 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(BEGIN(EVE_BITMAPS));
eos_eve_dl_write(VERTEX2II(box->x, box->y, 0, 0));
if (text_h2) {
eos_eve_dl_write(VERTEX2II(box->x, box->y + text_h1 * 16, 1, 0));
} else {
eos_eve_dl_write(NOP());
}
eos_eve_dl_write(END());
}
void eos_eve_text_draw(EVETextBox *box) {
box->dl_offset = eos_eve_dl_offset();
eos_eve_text_update(box);
}
void eos_eve_text_putc(EVETextBox *box, int c) {
int line_c, line_n;
line_c = box->buf_idx / 2 / box->w;
eos_eve_write16(EVE_RAM_G + box->buf_addr + box->buf_idx, 0x0A00 | (c & 0xff));
box->buf_idx = (box->buf_idx + 2) % (box->buf_line_h * box->w * 2);
line_n = box->buf_idx / 2 / box->w;
if ((line_c != line_n) && (_line_diff(box, line_n) == box->h)) {
_line_scroll(box);
}
}
void eos_eve_text_newline(EVETextBox *box) {
int line = (box->buf_idx / 2 / box->w + 1) % box->buf_line_h;
box->buf_idx = line * box->w * 2;
if (_line_diff(box, line) == box->h) {
_line_scroll(box);
}
}
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