wasd4862

0个粉丝

问答

专栏

资料

wasd4862 发布于 2013-09-16 18:22:15

采纳率 0%

7705

收藏
点赞
分享

微信扫码分享

QQ好友
举报

海思hi3531 hifb 按1080p显示图像

海思

海思sample_hifb 设置虚拟屏幕和可见屏幕尺寸时，出现后面    "Put variable screen info failed!" 求指点


                           var.xres_virtual = 1920;
                           var.yres_virtual = 1080;
                           var.xres = 1920;          ////可见屏幕尺寸
               var.yres = 1080;

                           var.transp = g_a32;
                           var.red = g_r32;
                           var.green  = g_g32;
                           var.blue = g_b32;
                           var.bits_per_pixel = 32;
                           var.activate = FB_ACTIVATE_NOW;

                           /* 6. set the variable screeninfo */
                           if (ioctl(pstInfo->fd, FBIOPUT_VSCREENINFO, &var) < 0)
                           {
                              printf("Put variable screen info failed!\n");
                              close(pstInfo->fd);
                              return false;
                           }
                           printf("open FBIOPUT_VSCREENINFO \n");

我来回答

回答6个

时间排序

认可量排序

david

47个粉丝

368

问答

253

专栏

229

资料

david 2013-09-18 10:05:11

认可0 回复引用举报

                           var.xres_virtual = 1920;
                           var.yres_virtual = 1080;
                           var.xres = 1920;          ////可见屏幕尺寸
               var.yres = 1080;

xres 和 yres调小看看（虚拟的）

wasd4862

0个粉丝

问答

专栏

资料

wasd4862 2013-09-20 11:51:23

认可0 回复引用举报

[quote][url=forum.php?mod=redirect&goto=findpost&pid=4296&ptid=2207]david 发表于 2013-9-18 10:05[/url]
var.xres_virtual = 1920;
                           var.yres_virtu ...[/quote]

把 xres 和 yres调小也失败，
               把设成  var.xres_virtual = 1920;
                           var.yres_virtual = 960;
                           var.xres = 1920;          ////可见屏幕尺寸
                  var.yres = 960;
这样就可以，用的HDMI输出，显示器也是支持1080P显示的。

但是屏幕占不满，底边空了一段黑的。只要将 var.yres_virtual ， var.yres ，其中一个设成1080，就会失败

hilinux

0个粉丝

问答

专栏

资料

hilinux 2013-09-21 15:48:20

认可0 回复引用举报

var.bits_per_pixel = 32;

这个设置为 16

shensifeng2011

0个粉丝

问答

专栏

资料

shensifeng2011 2014-01-15 14:05:37

认可0 回复引用举报

你好我想请教下，想在framebuffer上输出一张图片显示，我有个程序显示一直是黑屏，能帮我看下吗
#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;
}

jorley

0个粉丝

问答

专栏

资料

jorley 2014-03-14 16:35:08

认可0 回复引用举报

我之前也遇到设置1080P参数时，报 "Put variable screen info failed!" 错误，后来发现是hifb:vram0_size设置值太小了，默认是7200，不够1920*1080*4（32bit），在mpp/ko_hi3531中的load3531文件中设置该值，可以参考一下《HiFB开发指南.pdf》中第2章节，有解释这个。

wasd4862

0个粉丝

问答

专栏

资料

wasd4862 2013-09-18 09:23:12

认可0 回复引用举报

自己顶下！

海思hi3531 hifb 按1080p显示图像

Markdown 语法

Markdown 语法