linux framebuffer 显示图片问题_问答

我的程序这样写的为什么读不出来图片？？

#include
#include
#include
#include
#include
#include "inc/hifb.h"
#define IMAGE_WIDTH 1096
#define IMAGE_HEIGHT 346
#define IMAGE_SIZE (1096 * 346 * 2)
#define IMAGE_NUM 14
//#define IMAGE_PATH "/0705-yinxr/%d.bmp"
#define IMAGE_PATH "/0705-yinxr/blui_update.png"

static struct fb_bitfield g_r16 = {10, 5, 0};
static struct fb_bitfield g_g16 = {5, 5, 0};
static struct fb_bitfield g_b16 = {0, 5, 0};
static struct fb_bitfield g_a16 = {15, 1, 0};

/*bit area for argb 8888*/
static struct fb_bitfield g_r32 = {16, 8, 0};
static struct fb_bitfield g_g32 = {8, 8, 0};
static struct fb_bitfield g_b32 = {0, 8, 0};
static struct fb_bitfield g_a32 = {24, 8, 0};

int main()
{
int fd;
int i = 0;
struct fb_fix_screeninfo fix;
struct fb_var_screeninfo var;
unsigned char *pShowScreen;
unsigned char *pHideScreen;
HIFB_POINT_S stPoint = {100, 0};
HIFB_ALPHA_S stAlpha;

FILE *fp;
char image_name[128];

/*1. open Framebuffer device overlay 0*/
fd = open("/dev/fb0", O_RDWR);
if(fd < 0)
{
      printf("open fb0 failed!\n");
      return -1;
}

/*2. set the screen original position*/
//stPoint.s32XPos = 0;
//stPoint.s32YPos = 0;
if (ioctl(fd, FBIOPUT_SCREEN_ORIGIN_HIFB, &stPoint) < 0)
{
      printf("set screen original show position failed!\n");
      return -1;
}

#if 0
stAlpha.bAlphaEnable = HI_TRUE;
stAlpha.bAlphaChannel = HI_TRUE;
stAlpha.u8Alpha0 = 0xff;
stAlpha.u8Alpha1 = 0xff;
stAlpha.u8GlobalAlpha = 0xff;
#endif
if (ioctl(fd, FBIOPUT_ALPHA_HIFB,  &stAlpha) < 0)
{
      printf("Set alpha failed!\n");
close(fd);
      return HI_NULL;
}
/*3. get the variable screen info*/
if (ioctl(fd, FBIOGET_VSCREENINFO, &var) < 0)
{
      printf("Get variable screen info failed!\n");
      close(fd);
      return -1;
}
/*4. modify the variable screen info
         the screen size: IMAGE_WIDTH*IMAGE_HEIGHT
         the virtual screen size: IMAGE_WIDTH*(IMAGE_HEIGHT*2)
         the pixel format: ARGB1555
         */
#if 1
var.xres = 1920;
var.yres = 1080;
var.xres_virtual = 1920;
var.yres_virtual = 1080 * 2;
var.transp= g_a16;
var.red = g_r16;
var.green = g_g16;
var.blue = g_b16;
var.bits_per_pixel = 16;
#endif

/*5. set the variable screeninfo*/
if (ioctl(fd, FBIOPUT_VSCREENINFO, &var) < 0)
{
      printf("Put variable screen info failed!\n");
      close(fd);
      return -1;
}

/*6. get the fix screen info*/
if (ioctl(fd, FBIOGET_FSCREENINFO, &fix) < 0)
{
      printf("Get fix screen info failed!\n");
      close(fd);
      return -1;
}

/*7. map the physical video memory for user use*/
pShowScreen = mmap(NULL, fix.smem_len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
pHideScreen = pShowScreen + IMAGE_SIZE;
memset(pShowScreen, 0, IMAGE_SIZE);

/*8. load the bitmaps from file to hide screen and set pan display the
         hide screen*/
//for(i = 0; i < IMAGE_NUM; i++)
{
      sprintf(image_name, IMAGE_PATH);
      fp = fopen(image_name, "rb");
      if(NULL == fp)
      {
         printf("Load %s failed!\n", image_name);
         close(fd);
         return -1;
      }
      fread(pHideScreen, 1, IMAGE_SIZE, fp);
      fclose(fp);
#if 0
      if(i % 2)
      {
         var.yoffset = 0;
         pHideScreen = pShowScreen + IMAGE_SIZE;
      }
      else
      {
         var.yoffset = IMAGE_HEIGHT;
         pHideScreen = pShowScreen;
      }
#endif

      if (ioctl(fd, FBIOPAN_DISPLAY, &var) < 0)
      {
         printf("FBIOPAN_DISPLAY failed!\n");
         close(fd);
         return -1;
      }
}

printf("Enter to quit!\n");
getchar();

/*9. close the Framebuffer device*/
close(fd);
return 0;
}

linux framebuffer 显示图片问题

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