3.5电子书pc显示

使用svgalib

下载地址：
https://launchpad.net/ubuntu/+source/svgalib/1:1.4.3-30
svgalib_1.4.3.orig.tar.gz
svgalib_1.4.3-30.debian.tar.gz
svgalib_1.4.3-30.dsc

打补丁
tar xzf svgalib_1.4.3.orig.tar.gz
tar xzf svgalib_1.4.3-30.debian.tar.gz
cd svgalib-1.4.3.orig/
for file in ../debian/patches/*.patch; do patch -p1 < $file; done
执行for循环对于上层目录里的debian/patches/*.patch所有文件 执行 patch -p1 < $file命令

编译安装：
sudo make install   // 编译出错，需要安装libx86
再 sudo make install

下载地址
http://packages.ubuntu.com/lucid/libx86-1

tar xzf libx86_1.1+ds1.orig.tar.gz
gunzip libx86_1.1+ds1-6.diff.gz
cd libx86-1.1/
patch -p1 < ../libx86_1.1+ds1-6.diff
make // 出错，修改lrmi.c，添加宏, 参考561491.patch
make
sudo make install

ctrl+alt+shift+f1

#include <stdlib.h>
#include <vga.h>
#include <vgagl.h>

/* gcc -o svgatest svgatest.c -lvga -lvgagl */

int main(void)
{
    int x, y;
    
    vga_init();
    vga_setmode(G320x200x256);
    vga_setcolor(4);

    for (x = 0; x < 320; x++)
        for (y = 0; y < 200; y++)
            vga_drawpixel(x, y);

    sleep(5);
    vga_setmode(TEXT);

    return EXIT_SUCCESS;
}

sudo ./svgatest

如果缺少动态链接库

http://www.cnblogs.com/CZM-/p/5342427.html

使用调色板

#include <vgagl.h>

 gl_setpalettecolor(4, 0xE7>>2, 0xDB>>2, 0xB5>>2);   /* 0xE7DBB5  */ /* ·º»ÆµÄÖ½ */

gcc -o svgatest svgatest.c  -lvga -lvgagl

开始写pc电子书显示程序

修改Makefile

不用交叉编译

CROSSCOMPILE :=

添加库

all: $(OBJS)
        $(CC) $(LDFLAGS) -o show_file $^ -lvga -lvgagl

指定头文件目录

CFLAGS  += -I$(PWD)/include -I /usr/include/freetype2/

  display/crt.o                 

#include <config.h>
#include <disp_manager.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/fb.h>
#include <string.h>

#include <stdlib.h>
#include <vga.h>
#include <vgagl.h>

static int CRTDeviceInit(void);
static int CRTShowPixel(int iX, int iY, unsigned int dwColor);
static int CRTCleanScreen(unsigned int dwBackColor);
static int CRTDeviceExit(void);


static T_DispOpr g_tCRTOpr = {
    /* ÏÔʾÆÁĬÈÏÃû×Ö "crt*/
    .name        = "crt",    
    .DeviceInit  = CRTDeviceInit,
    .DeviceExit  = CRTDeviceExit,
    .ShowPixel   = CRTShowPixel,
    .CleanScreen = CRTCleanScreen,
};

static int CRTDeviceInit(void)
{
    vga_init();
    vga_setmode(G320x200x256);
    g_tCRTOpr.iXres = 320;
    g_tCRTOpr.iYres = 200;
    g_tCRTOpr.iBpp = 8;
    return 0;
}

static int CRTDeviceExit(void)
{
    vga_setmode(TEXT);

    return EXIT_SUCCESS;
}


static int CRTShowPixel(int iX, int iY, unsigned int dwColor)
{
    int iRed,iGreen,iBlue;

    iRed   = (dwColor >> 16) & (0xff);
    iGreen = (dwColor >> 8) & (0xff);
    iBlue  = (dwColor >> 0) & (0xff);

    gl_setpalettecolor(5, iRed>>2, iGreen>>2, iBlue>>2);   /* 0xE7DBB5  */ /* ·º»ÆµÄÖ½ */
    vga_setcolor(5);

    vga_drawpixel(iX, iY);
    return 0;
}

static int CRTCleanScreen(unsigned int dwBackColor)
{
    int iX;
    int iY;
    int iRed,iGreen,iBlue;

    iRed   = (dwBackColor >> 16) & (0xff);
    iGreen = (dwBackColor >> 8) & (0xff);
    iBlue  = (dwBackColor >> 0) & (0xff);

    gl_setpalettecolor(4, iRed>>2, iGreen>>2, iBlue>>2);   /* 0xE7DBB5  */ /* ·º»ÆµÄÖ½ */
    vga_setcolor(4);

    for (iX = 0; iX < 320; iX++)
        for (iY = 0; iY < 200; iY++)
            vga_drawpixel(iX, iY);
    return 0;
}

int CRTInit(void)
{
    return RegisterDispOpr(&g_tCRTOpr);
}

./show_file -s 16  -d crt -h HZK16   -f ./MSYH.TTF daomubiji.txt