UP 路径优化
This commit is contained in:
JiXieShi
193
lib/font/font.cpp
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193
lib/font/font.cpp
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@@ -0,0 +1,193 @@
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#include "lvgl_font.h"
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#include "font.h"
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uint8_t Font_utf8_to_unicode(uint8_t *pInput, uint32_t *unicode_letter) {
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uint8_t outputSize = 0;
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uint8_t * tmp= ( uint8_t *) unicode_letter;
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if (*pInput > 0x00 && *pInput <= 0x7F) //处理单字节UTF8字符（英文字母、数字）
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{
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*tmp = *pInput;
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tmp++;
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*tmp = 0; //小端法表示，在高地址填补0
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outputSize = 1;
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} else if (((*pInput) & 0xE0) == 0xC0) //处理双字节UTF8字符
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{
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uint8_t high = *pInput;
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pInput++;
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uint8_t low = *pInput;
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if ((low & 0xC0) != 0x80) //检查是否为合法的UTF8字符表示
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return 0; //如果不是则报错
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*tmp = (high << 6) + (low & 0x3F);
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tmp++;
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*tmp = (high >> 2) & 0x07;
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outputSize = 2;
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} else if (((*pInput) & 0xF0) == 0xE0) //处理三字节UTF8字符
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{
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uint8_t high = *pInput;
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pInput++;
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uint8_t middle = *pInput;
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pInput++;
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uint8_t low = *pInput;
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if (((middle & 0xC0) != 0x80) || ((low & 0xC0) != 0x80))
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return 0;
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*tmp = (middle << 6) | (low & 0x3F);
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tmp++;
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*tmp = (high << 4) | ((middle >> 2) & 0x0F);
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outputSize = 3;
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} else //对于其他字节数的UTF8字符不进行处理
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{
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return 0;
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}
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return outputSize;
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}
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void draw_letter_normal(Font_f_t *fd, uint16_t pos_x, uint16_t pos_y, lv_font_glyph_dsc_t *g, const uint8_t *map_p) {
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uint32_t bitmask_init;
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uint32_t bitmask;
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uint32_t bpp = g->bpp;
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if (bpp == 3)
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bpp = 4;
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switch (bpp) {
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case 1:
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bitmask_init = 0x80;
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break;
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case 2:
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bitmask_init = 0xC0;
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break;
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case 4:
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bitmask_init = 0xF0;
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break;
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case 8:
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bitmask_init = 0xFF;
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break;
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default:
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return; /*Invalid bpp. Can't render the letter*/
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}
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int32_t col, row;
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int32_t box_w = g->box_w;
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int32_t box_h = g->box_h;
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int32_t width_bit = box_w * bpp; /*Letter width in bits*/
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/* Calculate the col/row start/end on the map*/
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int32_t col_start = 0;
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int32_t col_end = box_w;
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int32_t row_start = 0;
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int32_t row_end = box_h;
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/*Move on the map too*/
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uint32_t bit_ofs = (row_start * width_bit) + (col_start * bpp);
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map_p += bit_ofs >> 3;
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uint8_t letter_px;
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uint32_t col_bit;
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col_bit = bit_ofs & 0x7; /* "& 0x7" equals to "% 8" just faster */
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// uint32_t mask_buf_size = box_w * box_h > LV_HOR_RES_MAX ? LV_HOR_RES_MAX : box_w * box_h;
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// unsigned short mask_buf[LV_HOR_RES_MAX / 2];
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#if PIX_COLOR_SIZE == 1
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uint8_t fd_buf[fd->dev_w / 2];
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#endif
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#if PIX_COLOR_SIZE == 16
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uint16_t fd_buf[fd->dev_w / 2];
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#endif
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uint32_t col_bit_max = 8 - bpp;
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uint32_t col_bit_row_ofs = (box_w + col_start - col_end) * bpp;
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uint16_t index = 0;
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for (row = row_start; row < row_end; row++) {
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bitmask = bitmask_init >> col_bit;
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for (col = col_start; col < col_end; col++) {
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/*Load the pixel's opacity into the mask*/
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letter_px = (*map_p & bitmask) >> (col_bit_max - col_bit);
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#if PIX_COLOR_SIZE == 1
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if (letter_px) {
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fd_buf[index / 8] |= (1 << (index % 8));
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} else {
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fd_buf[index / 8] &= ~(1 << (index % 8));
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}
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index++;
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#endif
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#if PIX_COLOR_SIZE == 16
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if (letter_px) {
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fd_buf[index] = fd->pixcolor;
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} else {
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fd_buf[index] = fd->backgroundcolor;
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}
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index++;
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#endif
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/*Go to the next column*/
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if (col_bit < col_bit_max) {
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col_bit += bpp;
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bitmask >>= bpp;
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} else {
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col_bit = 0;
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bitmask = bitmask_init;
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map_p++;
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}
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}
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{
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// LCD_fill_fast(pos_x, pos_y, box_w, 1, (uint8_t *)mask_buf, box_w);
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#ifdef LINE_FAST_SHOW
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fd->x = pos_x;
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fd->y = pos_y;
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fd->w = box_w;
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fd->h = 1;
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fd->show(fd, fd_buf, box_w);
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pos_y++;
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index = 0;
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#endif
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} //避免大字体,大缓存 ,单行即刻刷入
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col_bit += col_bit_row_ofs;
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map_p += (col_bit >> 3);
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col_bit = col_bit & 0x7;
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}
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#ifndef LINE_FAST_SHOW
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fd->x = pos_x;
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fd->y = pos_y;
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fd->w = box_w;
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fd->h = box_h;
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fd->show(fd, fd_buf, box_w * box_h);
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#endif
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}
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uint8_t Font_draw_letter(const lv_font_t *font, Font_f_t *fd, uint32_t letter, int16_t pos_x, int16_t pos_y) {
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const uint8_t *map_p;
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lv_font_glyph_dsc_t g;
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if (!font->get_glyph_dsc(font, &g, letter, '\0')) //获取字体 信息
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return 0;
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if (letter == ' ') // lvgl 空格没有实际数据 直接跳过
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return g.box_w;
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/* Don't draw anything if the character is empty. E.g. space */
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if ((g.box_h == 0) || (g.box_w == 0))
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return 0;
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map_p = font->get_glyph_bitmap(font, letter); //获取字体 实际数据
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if (map_p == NULL)
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return 0;
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pos_x += g.ofs_x; //偏移修正
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pos_y += font->line_height - g.box_h - g.ofs_y;
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if (pos_x < 1) //有的时候会为负
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pos_x = 1;
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if (pos_y < 1) //有的时候会为负
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pos_y = 1;
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draw_letter_normal(fd, pos_x, pos_y, &g, map_p);
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return g.box_w;
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}
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44
lib/font/inc/font.h
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44
lib/font/inc/font.h
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@@ -0,0 +1,44 @@
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#pragma once
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#ifndef HW_LIB_FONT_H
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#define HW_LIB_FONT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "stdlib.h"
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#include "string.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "lvgl_font.h"
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// 定义像素颜色的位数
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#define PIX_COLOR_SIZE 1
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// 启用单行刷新
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//#define LINE_FAST_SHOW
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typedef struct Font Font_f_t;
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typedef void (*Font_Show_t)(Font_f_t *font, uint8_t *data, size_t len);
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struct Font {
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void *dev;
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uint8_t dev_w;
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uint16_t x, y, w, h;
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Font_Show_t show;
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#if PIX_COLOR_SIZE == 16
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uint16_t pixcolor;
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uint16_t backgroundcolor;
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#endif
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};
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uint8_t Font_utf8_to_unicode(uint8_t *pInput, uint32_t *unicode_letter);
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uint8_t Font_draw_letter(const lv_font_t *font, Font_f_t *fd, uint32_t letter, int16_t pos_x, int16_t pos_y);
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#ifdef __cplusplus
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}
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#endif
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#endif
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224
lib/font/inc/lvgl_font.h
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224
lib/font/inc/lvgl_font.h
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@@ -0,0 +1,224 @@
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#pragma once
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#ifndef __lvgl_H
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#define __lvgl_H
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#include "stdlib.h"
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#include "string.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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/* Attribute to mark large constant arrays for example
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* font's bitmaps */
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#define LV_ATTRIBUTE_LARGE_CONST
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/** Format of font character map. */
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enum {
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LV_FONT_FMT_TXT_CMAP_FORMAT0_TINY,
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LV_FONT_FMT_TXT_CMAP_FORMAT0_FULL,
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LV_FONT_FMT_TXT_CMAP_SPARSE_TINY,
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LV_FONT_FMT_TXT_CMAP_SPARSE_FULL,
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};
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typedef uint8_t lv_font_fmt_txt_cmap_type_t;
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typedef uint8_t lv_opa_t;
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/** This describes a glyph. */
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typedef struct {
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#if LV_FONT_FMT_TXT_LARGE == 0
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uint32_t bitmap_index: 20; /**< Start index of the bitmap. A font can be max 1 MB. */
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uint32_t adv_w: 12; /**< Draw the next glyph after this width. 8.4 format (real_value * 16 is stored). */
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uint8_t box_w; /**< Width of the glyph's bounding box*/
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uint8_t box_h; /**< Height of the glyph's bounding box*/
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int8_t ofs_x; /**< x offset of the bounding box*/
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int8_t ofs_y; /**< y offset of the bounding box. Measured from the top of the line*/
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#else
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uint32_t bitmap_index; /**< Start index of the bitmap. A font can be max 4 GB. */
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uint32_t adv_w; /**< Draw the next glyph after this width. 28.4 format (real_value * 16 is stored). */
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uint16_t box_w; /**< Width of the glyph's bounding box*/
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uint16_t box_h; /**< Height of the glyph's bounding box*/
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int16_t ofs_x; /**< x offset of the bounding box*/
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int16_t ofs_y; /**< y offset of the bounding box. Measured from the top of the line*/
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#endif
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} lv_font_fmt_txt_glyph_dsc_t;
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/* 将码点映射到 `glyph_dsc` 的结构体
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* 支持多种格式以优化内存使用
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* 详见 https://github.com/lvgl/lv_font_conv/blob/master/doc/font_spec.md
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*/
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typedef struct {
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/** 此范围的第一个Unicode字符 */
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uint32_t range_start;
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/** 与此范围相关的Unicode字符数。
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* 最后一个Unicode字符 = range_start + range_length - 1*/
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uint16_t range_length;
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/** 此范围的第一个字形ID（`glyph_dsc` 的数组索引） */
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uint16_t glyph_id_start;
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/*
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根据规范，有4种格式：
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https://github.com/lvgl/lv_font_conv/blob/master/doc/font_spec.md
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为简单起见引入“相对码点”：
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rcp = codepoint - range_start
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和一个搜索函数：
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在“数组”中搜索“值”并返回“值”的索引。
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格式0 紧凑
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unicode_list == NULL && glyph_id_ofs_list == NULL
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glyph_id = glyph_id_start + rcp
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格式0 完整
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unicode_list == NULL && glyph_id_ofs_list != NULL
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glyph_id = glyph_id_start + glyph_id_ofs_list[rcp]
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Fomat 紧凑
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unicode_list != NULL && glyph_id_ofs_list == NULL
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glyph_id = glyph_id_start + search(unicode_list, rcp)
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Fomat 完整
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unicode_list != NULL && glyph_id_ofs_list != NULL
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glyph_id = glyph_id_start + glyph_id_ofs_list[search(unicode_list, rcp)]
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*/
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const uint16_t *unicode_list;
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/** 如果(type == LV_FONT_FMT_TXT_CMAP_FORMAT0_...)，则为 `uint8_t *`
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* 如果(type == LV_FONT_FMT_TXT_CMAP_SPARSE_...)，则为 `uint16_t *`
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*/
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const void *glyph_id_ofs_list;
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/** `unicode_list` 和/或 `glyph_id_ofs_list` 的长度 */
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uint16_t list_length;
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/** 此字符映射的类型 */
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lv_font_fmt_txt_cmap_type_t type;
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} lv_font_fmt_txt_cmap_t;
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/* 描述字体的附加数据的结构体 */
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typedef struct {
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/* 所有字形的位图 */
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const uint8_t *glyph_bitmap;
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/* 描述字形 */
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const lv_font_fmt_txt_glyph_dsc_t *glyph_dsc;
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/* 将字形映射到Unicode字符。
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* `lv_font_cmap_fmt_txt_t` 变量的数组 */
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const lv_font_fmt_txt_cmap_t *cmaps;
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/* 存储字距值。
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* 可以是 `lv_font_fmt_txt_kern_pair_t *` 或 `lv_font_kern_classes_fmt_txt_t *`
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* 取决于 `kern_classes` */
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const void *kern_dsc;
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/* 缩放字距值，12.4格式 */
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uint16_t kern_scale;
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/* cmap表的数量 */
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uint16_t cmap_num: 10;
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/* 每像素位数：1, 2, 3, 4, 8 */
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uint16_t bpp: 4;
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/* `kern_dsc` 的类型 */
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uint16_t kern_classes: 1;
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/*
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* 位图的存储格式
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* 取自 `lv_font_fmt_txt_bitmap_format_t`
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*/
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uint16_t bitmap_format: 2;
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/* 缓存最后一个字母和其字形ID */
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uint32_t last_letter;
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uint32_t last_glyph_id;
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} lv_font_fmt_txt_dsc_t;
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/* 坐标类型。应为 `int16_t`（或在极端情况下为 `int32_t`） */
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typedef int16_t lv_coord_t;
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/** 描述字形属性的结构体 */
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typedef struct {
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uint16_t adv_w; /**< 字形所需的空间。在此宽度后绘制下一个字形。8位整数，4位小数 */
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uint16_t box_w; /**< 字形的包围框宽度 */
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uint16_t box_h; /**< 字形的包围框高度 */
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int16_t ofs_x; /**< 包围框的x偏移量 */
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int16_t ofs_y; /**< 包围框的y偏移量 */
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uint8_t bpp; /**< 每像素位数：1, 2, 4, 8 */
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} lv_font_glyph_dsc_t;
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/** 描述字体的属性的结构体 */
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typedef struct _lv_font_struct {
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/** 从字体中获取字形描述符 */
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bool (*get_glyph_dsc)(const struct _lv_font_struct *, lv_font_glyph_dsc_t *, uint32_t letter, uint32_t letter_next);
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/** 从字体中获取字形的位图 */
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const uint8_t *(*get_glyph_bitmap)(const struct _lv_font_struct *, uint32_t);
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/* 指向字体包中的字体的指针（必须具有相同的行高） */
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lv_coord_t line_height; /**< 任何文本都适合的实际行高 */
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lv_coord_t base_line; /**< 从行高顶部测量的基准线 */
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uint8_t subpx: 2; /**< `lv_font_subpx_t` 的一个元素 */
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int8_t underline_position; /**< 下划线顶部与基准线之间的距离（< 0 表示在基准线下方）*/
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int8_t underline_thickness; /**< 下划线的厚度 */
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void *dsc; /**< 在这里存储特定于实现或运行时数据或缓存 */
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} lv_font_t;
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//#define NULL 0 /* see <stddef.h> */
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/** Bitmap formats*/
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typedef enum {
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LV_FONT_FMT_TXT_PLAIN = 0,
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LV_FONT_FMT_TXT_COMPRESSED = 1,
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LV_FONT_FMT_TXT_COMPRESSED_NO_PREFILTER = 1,
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} lv_font_fmt_txt_bitmap_format_t;
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||||
|
||||
|
||||
typedef uintptr_t lv_uintptr_t;
|
||||
|
||||
|
||||
/** 用于简单映射字距值对的结构体 */
|
||||
typedef struct {
|
||||
/* 获取两个字符代码点之间的字距值：
|
||||
1. 从 `lv_font_fmt_txt_cmap_t` 中获取 `glyph_id_left` 和 `glyph_id_right`
|
||||
2. for(i = 0; i < pair_cnt * 2; i+2)
|
||||
if(gylph_ids[i] == glyph_id_left &&
|
||||
gylph_ids[i+1] == glyph_id_right)
|
||||
return values[i / 2];
|
||||
*/
|
||||
const void *glyph_ids; /* 存储字形ID对 */
|
||||
const int8_t *values; /* 存储字距值 */
|
||||
uint32_t pair_cnt: 24; /* 字距值对的数量 */
|
||||
uint32_t glyph_ids_size: 2; /* 0: `glyph_ids` 存储为 `uint8_t`; 1: 存储为 `uint16_t` */
|
||||
} lv_font_fmt_txt_kern_pair_t;
|
||||
|
||||
/** 更复杂但更优化的基于类别的字距值存储结构体 */
|
||||
typedef struct {
|
||||
/* 结构体用于获取两个字符代码点之间的字距值：
|
||||
1. 从 `lv_font_fmt_txt_cmap_t` 中获取 `glyph_id_left` 和 `glyph_id_right`
|
||||
2. 获取左侧和右侧字形的类别，分别为 `left_class` 和 `right_class`
|
||||
left_class = left_class_mapping[glyph_id_left];
|
||||
right_class = right_class_mapping[glyph_id_right];
|
||||
3. value = class_pair_values[(left_class-1)*right_class_cnt + (right_class-1)]
|
||||
*/
|
||||
|
||||
const int8_t *class_pair_values; /* 存储左侧类别数 * 右侧类别数的值 */
|
||||
const uint8_t *left_class_mapping; /* 将字形ID映射到类别：索引 -> 字形ID -> 类别ID */
|
||||
const uint8_t *right_class_mapping; /* 将字形ID映射到类别：索引 -> 字形ID -> 类别ID */
|
||||
uint8_t left_class_cnt; /* 左侧类别数 */
|
||||
uint8_t right_class_cnt; /* 右侧类别数 */
|
||||
} lv_font_fmt_txt_kern_classes_t;
|
||||
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user