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根据ttf文件 获取汉字点阵数据

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在这里插入图片描述

untitled3.pro

QT -= gui

CONFIG += c++11 console
CONFIG -= app_bundle

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

LIBS       += -L$$PWD/freetype2/lib -lfreetype
INCLUDEPATH += $$PWD/freetype2/include

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        main.cpp

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

# 执行copy命令
copyConfigFiles.commands = cp $$PWD/汉仪魏碑简.ttf $$OUT_PWD/汉仪魏碑简.ttf
QMAKE_EXTRA_TARGETS += copyConfigFiles
POST_TARGETDEPS += copyConfigFiles

main.cpp

/* example1.c                                                      */
/*                                                                 */
/* This small program shows how to print a rotated string with the */
/* FreeType 2 library.                                             */
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <QDebug>
#include "freetype2/ft2build.h"
#include FT_FREETYPE_H
#define WIDTH   80
#define HEIGHT  80

#include <ft2build.h>
#include <arpa/inet.h>
#include FT_FREETYPE_H

#define FONT_SIZE 16

typedef unsigned short WORD;

#define printf(fmt,...) (void)0

int print_font(char* buf, int point_size)
{
    unsigned char mask = 0x80;
    int i = 0;
    QString str;
    while(i < point_size)
    {
        int index = 0;
        mask = 0x80;
        for(index = 0; index < 8; index++) {
            bool flag = mask & buf[i];
            if(flag) {
                str += "O ";
            } else {
                str += "  ";
            }

            mask >>= 1;
        }
        if((i + 1) % (FONT_SIZE/8) == 0) {
            qDebug() << str;
            str.clear();
        }
        i++;
    }
}

static int g_index = 0;
int set_bit_value(int value, char font_buf[32], int font_size)
{
    g_index %= (font_size*font_size);
    int byte_index = g_index / 8;
    int bit_index  = g_index % 8;
    bit_index = 7 - bit_index;
    font_buf[byte_index] &= ~(1 << bit_index);
    font_buf[byte_index] |= (value << bit_index);
    g_index++;
}


static FT_Library library;
static FT_Face face;
void print_face_info(FT_Face face)
{
    int n ;
    FT_CharMap map;
    char* p;
    for(n = 0; n < face->num_charmaps; ++n)
    {
        map = face->charmaps[n];
        int encode = htonl(map->encoding);
        p = (char*)&encode;
        printf("%d  %d %d\n", map->platform_id, map->encoding_id, map->encoding);
        printf("encode : %c %c %c %c\n", p[0], p[1], p[2], p[3]);
    }
}
int freeType_init(const char* ttf_path, int font_size)
{

    int error;
    error = FT_Init_FreeType(&library);
    if (error)
    {
        printf("can not init free type library!\n");
        return 0;
    }

    error = FT_New_Face(library, ttf_path, 0, &face);
    if (error)
    {
        printf("create new face falied!\n");
        return 0;
    }

    print_face_info(face);

    printf("faces num : %ld , glyphs num : %ld\n", face->num_faces, face->num_glyphs);

    error = FT_Set_Pixel_Sizes(face, 0, font_size);
    if (error)
    {
        printf("set font size error!\n");
        return 0;
    }

#if 1
    error = FT_Select_Charmap(face, ft_encoding_unicode);
    if (error)
    {
        printf("select charmap error!\n");
        return 0;
    }
#endif
    return 0;
}

int freeType_Uninit()
{

    int error;
    error = FT_Done_FreeType(library);
    if (error)
    {
        printf("can not Uninit free type library!\n");
        return 0;
    }
    return 0;
}

int get_font_by_index(const char* ttf_path, int font_size, int char_index, char font_buf[32])
{
    int error;
    int i, j, k, counter;
    unsigned char temp;
    FT_UInt  glyph_index;

#if 0
    error = FT_Init_FreeType(&library);
    if (error)
    {
        printf("can not init free type library!\n");
        return 0;
    }

    error = FT_New_Face(library, ttf_path, 0, &face);
    if (error)
    {
        printf("create new face falied!\n");
        return 0;
    }
#endif

    //printf("file family name %s\n", face->family_name);

    //printf("file style name %s\n", face->style_name);

    //printf("number of char %d\n", face->num_glyphs);

    //printf("number of fixed bitmap %d\n", face->num_fixed_sizes);

    //printf("Char size %d\n", face->size);

    /**********************************************************/
    /************************做索引转换**********************************/
    /**********************************************************/
#if 1

    printf("char_index: 0x%x\n", char_index);

    glyph_index = FT_Get_Char_Index( face, char_index  );

//    printf("glyph_index : %d\n", glyph_index);
    qDebug() << "glyph_index : " << glyph_index;

    if(!glyph_index) return 0;
    /**********************************************************/


    error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
    if (error) {
        printf("Load char error!\n");
        return 0;
    }

    if (face->glyph->format != FT_GLYPH_FORMAT_BITMAP) {
        error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO);
        if (error) {
            printf("render char failed!\n");
            return 0;
        }
    }
#else
    error = FT_Load_Char( face, char_index, FT_LOAD_RENDER);
    if (error)
    {
        printf("render char failed!\n");
        return 0;
    }
#endif

    // printf("rows %d, width %d\n", face->glyph->bitmap.rows, face->glyph->bitmap.width);

    //printf("pitch %d\n", face->glyph->bitmap.pitch);

    // printf("bit_map_left %d bit_map_top %d\n", face->glyph->bitmap_left,

    // face->glyph->bitmap_top);

    // printf("width %d height %d\n", face->glyph->metrics.width, face->glyph->metrics.height);

    // printf("%d %d %d\n", face->glyph->metrics.horiBearingX, face->glyph->metrics.horiBearingY,

    // face->glyph->metrics.horiAdvance);

    FT_Bitmap* bitmap = &face->glyph->bitmap;
    printf("r:%d, w:%d, p: %d, s: %d\n",
           bitmap->rows,
           bitmap->width,
           bitmap->pitch,
           bitmap->num_grays);

    for (j = 0; j < (font_size * 26) / 32 - face->glyph->bitmap_top; j++) {
        QString str;
        for (i = 0; i < font_size; i++) {
            str += "_";
            set_bit_value(0, font_buf, font_size);
        }
        qDebug() << str;
    }

    for (; j < face->glyph->bitmap.rows + (font_size * 26) / 32 - face->glyph->bitmap_top; j++)
    {
        if(j > 20000) {
            break;
        }
        QString str;
        for (i = 1; i <= face->glyph->bitmap_left; i++)
        {
            str += "_";
            set_bit_value(0, font_buf, font_size);
        }

        for (k = 0; k < face->glyph->bitmap.pitch; k++)
        {
            temp = face->glyph->bitmap.buffer[face->glyph->bitmap.pitch*(j + face->glyph->bitmap_top - (font_size * 26) / 32) + k];
            for (counter = 0; counter < 8; counter++)
            {
                if (temp & 0x80) {
                    str += "*";
                    set_bit_value(1, font_buf, font_size);
                } else {
                    str += "_";
                    set_bit_value(0, font_buf, font_size);
                }
                temp <<= 1;
                i++;
                if (i > font_size) {
                    break;
                }
            }
        }

        for (; i <= font_size; i++)
        {
            // printf("|");
            set_bit_value(0, font_buf, font_size);

        }
        qDebug() << str;
    }

    for (; j < font_size; j++) {
        QString str;
        for (i = 0; i < font_size; i++) {
            str += "_";
            set_bit_value(0, font_buf, font_size);
        }
        qDebug() << str;
    }

    char tmpfont_buf[32];
    memcpy(tmpfont_buf, font_buf, sizeof(tmpfont_buf));

    for (; j < font_size; j++) {
        for (i = 0; i < font_size; i++) {
            printf("3");
            set_bit_value(0, font_buf, font_size);
        }
        printf("\n");
    }

    return 1;
}

int main(int argc, char* argv[])
{
    qDebug() << "int main(int argc, char* argv[])";
    char font_buf[FONT_SIZE * FONT_SIZE / 8] = {'\0'};
    char* unicode_font_name = "unicode_16x16.bin";
    FILE* file = fopen(unicode_font_name, "w+");

    freeType_init("./汉仪魏碑简.ttf", FONT_SIZE);

    int i;

    wchar_t *wszString = L"版";
    WORD word;
    int wszStringLen = wcslen(wszString);
    printf("wszStringLen: %d\n",wszStringLen);
    memcpy(&word, wszString, 2);

    for(i = 0; i < 1; ++i) {
        if(get_font_by_index(argv[1], FONT_SIZE, word, font_buf)) {

            print_font(font_buf, sizeof(font_buf));

            fwrite(font_buf, 1, sizeof(font_buf), file);
        } else {
            memset(font_buf, 0, sizeof(font_buf));
            fwrite(font_buf, 1, sizeof(font_buf), file);
        }

        g_index = 0;

    }

    freeType_Uninit();
    return 0;
}

运行效果

在这里插入图片描述