操作帧缓冲:测试程序 struct fb_var_screeninfo struct fb_fix_screeninfo fix
#include
#include
#include//堆空间#man calloc
#include
#include
#include
#include//mmap()函数
/*测试：可以在开发板上测试，也可以在pc上测试
*pc上测试要注意先进入真实终端模式，通过ctrl+alt+f1~f6可分别进入
*个终端，通过ctrl+alt+f7可回到终端
*/
转载请注明博客原文地址：http://blog.csdn.net/oyhb_1992/article/details/77659021
typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;
typedef unsigned int s32;
typedef unsigned short s16;
typedef signed char s8;
#define RGB888(r,g,b) (r<<16 | (g)<<8| (b))
struct ldm_info{
int fd;//打开的文件描述符
struct fb_var_screeninfo var; //结构体定义在/usr/include/linux/fb.h头文件里
struct fb_fix_screeninfo fix;
int x_size,y_size;//屏幕的实际分辨率
int bpp; //每个像素占多少个字节
u8 *start_addr; //显存映射到当前进程空间的地址
void (*draw_pixel) (struct ldm_info *info,int x,int y,u32 color);
};
//在指定的坐标位置画出一个像素点的颜色
static void draw_pixel_32(struct ldm_info * info,int x,int y,u32 color)
{
*(u32*)(info->start_addr + y *info->fix.line_length+x*info->bpp)=color;
}
static void draw_rect(struct ldm_info * info,int x,int y,int xlen,int ylen,u32 color)
{
int ix,iy;
*(u32*)(info->start_addr + y *info->fix.line_length+x*info->bpp)=color;
for(iy=0;iyx_size,info->y_size,color);
}
static void print_screen_info(struct ldm_info * info)
{
//操作系统告诉里的屏幕的分辨率
printf("var: xres=%d, yres=%d,xres_virtual= %d\n, yres_virtual=%d\n", info->var.xres, info->var.yres,info->var.xres_virtual, info->var.yres_virtual);
//我们实际算出来的屏幕分辨率，比较理论和实际是否相等
printf("x_size = %d, y_size = %d\n", info->x_size,info->y_size);
printf("bits_per_pixel=%d, bpp=%d\n",info->var.bits_per_pixel,info->bpp);
printf("red: offset=%d, length=%d,msb_right=%d\n",info->var.red
.offset, info->var.red.length,info->var.red.msb_right);
printf("green: offset=%d, length=%d,msb_right=%d\n",info->var.green
.offset, info->var.green.length,info->var.green.msb_right);
printf("blue: offset=%d, length=%d,msb_right=%d\n",info->var.blue.offset, info->var.blue.length,info->var.blue.msb_right);
}
int main(int argc , char ** argv)
{
int ret;
if(argc<2)
{
fprintf(stderr,"fbapp\n");//必须要有一个fb device 的设备节点
return -1;
}
//结构体存到堆空间
struct ldm_info *ldm_info = calloc(1,sizeof(struct ldm_info));
//打开设备文件
ldm_info->fd = open(argv[1],O_RDWR);
/*ldm_info->fd = open("/dev/fb0",O_RDWR);*/
if(ldm_info->fd<0)
{
perror("openfd failed");
goto err_open_fd;
}
//获取var和fix对象，得到当前屏幕的分辨率和色深参数
ret = ioctl(ldm_info->fd,FBIOGET_VSCREENINFO, &ldm_info-> var); //获取可变参数
if(ret<0)
{
perror("ioctl get var failed");
goto err_ioctl_get;
}
ret = ioctl(ldm_info->fd ,FBIOGET_FSCREENINFO, &ldm_info->fix);//获取 固定参数
if(ret<0)
{
perror("ioctl get fix failed");
goto err_ioctl_get;
}
//通过fix中的两个成员可以计算得到屏幕的实际分辨率
ldm_info->bpp = ldm_info->var.bits_per_pixel/8;
switch(ldm_info->bpp)
{
case 2:
// ldm_info->draw_pixel= draw_pixel_16bit;
break;
case 3:
ldm_info->bpp=4;
case 4:
ldm_info->draw_pixel =draw_pixel_32;
break;
}
ldm_info->y_size = ldm_info->var.yres;
ldm_info->x_size = ldm_info->fix.line_length/ ldm_info->bpp;//一行的字节数除以一个像素点的字节数
print_screen_info(ldm_info);
//将显存映射到当前进程空间，得到显存映射后的虚拟首地址
/*把/dev/fb0映射到程序进程的内存空间中来，然后得到一个指向这段存储空间的指针，这样就可以方便的读写了
但是我们要知道能映射多少和该映射多少，这能很方便的从上面一个程序得出的参数来决定*/
ldm_info->start_addr=mmap(NULL,ldm_info->fix.smem_len,PROT_WRITE,MAP_SHARED,ldm_info->fd,0);
if(MAP_FAILED == ldm_info->start_addr)
{
perror("mmap");
goto err_mmap;
}
//开始画图
clear_screen(ldm_info,0,0,ldm_info->x_size,ldm_info->y_size,RGB888(0,0,255));
//draw_rect(struct ldm_info * info,int x,int y,int xlen,int ylen,u32 color)
draw_rect(ldm_info,ldm_info->x_size/4,ldm_info->y_size/4,ldm_info->x_size/2,ldm_info->y_size/2,RGB888(255,0,0));
close(ldm_info->fd);
free(ldm_info);
return 0;
err_mmap:
munmap(ldm_info->start_addr, ldm_info->fix.smem_len);
err_ioctl_get:
close(ldm_info->fd);
free(ldm_info);
err_open_fd:
free(ldm_info);
}
/*运行程序：
./ldm_app /dev/fb0
注意一定要养成好的习惯，每次操作如果函数有出错误的可能性都要每次进行判断
打印出错误信息，这样以后调试的时候才能更省时间
*/
在应用程序中，操作/dev/fbn的一般步骤如下：
（1）打开/dev/fbn设备文件。
（2）用ioctl()操作取得当前显示屏幕的参数，如屏幕分辨率、每
个像素点的比特数。根据屏幕参数可计算屏幕缓冲区的大小。
（3）用mmap()函数，将屏幕缓冲区映射到用户空间。
（4）映射后就可以直接读/写屏幕缓冲区，进行绘图和图片显示了。
/****************************************/usr/include/linux/fb.h头文件分析/******************************************************/
转载请注明博客原文地址：http://blog.csdn.net/oyhb_1992/article/details/77659021
#ifndef _LINUX_FB_H
#define _LINUX_FB_H
#include
#include
struct dentry;
/* Definitions of frame buffers */
#define FB_MAX 32 /* sufficient for now */
/* ioctls
0x46 is 'F' */
#define FBIOGET_VSCREENINFO 0x4600
#define FBIOPUT_VSCREENINFO 0x4601
#define FBIOGET_FSCREENINFO 0x4602
#define FBIOGETCMAP 0x4604
#define FBIOPUTCMAP 0x4605
#define FBIOPAN_DISPLAY 0x4606
#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor)
/* 0x4607-0x460B are defined below */
/* #define FBIOGET_MONITORSPEC 0x460C */
/* #define FBIOPUT_MONITORSPEC 0x460D */
/* #define FBIOSWITCH_MONIBIT 0x460E */
#define FBIOGET_CON2FBMAP 0x460F
#define FBIOPUT_CON2FBMAP 0x4610
#define FBIOBLANK 0x4611 /* arg: 0 or vesa level + 1 */
#define FBIOGET_VBLANK _IOR('F', 0x12, struct fb_vblank)
#define FBIO_ALLOC 0x4613
#define FBIO_FREE 0x4614
#define FBIOGET_GLYPH 0x4615
#define FBIOGET_HWCINFO 0x4616
#define FBIOPUT_MODEINFO 0x4617
#define FBIOGET_DISPINFO 0x4618
#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
#define FB_TYPE_PACKED_PIXELS 0 /* Packed Pixels */
#define FB_TYPE_PLANES 1 /* Non interleaved planes */
#define FB_TYPE_INTERLEAVED_PLANES 2 /* Interleaved planes */
#define FB_TYPE_TEXT 3 /* Text/attributes */
#define FB_TYPE_VGA_PLANES 4 /* EGA/VGA planes */
#define FB_AUX_TEXT_MDA 0 /* Monochrome text */
#define FB_AUX_TEXT_CGA 1 /* CGA/EGA/VGA Color text */
#define FB_AUX_TEXT_S3_MMIO 2 /* S3 MMIO fasttext */
#define FB_AUX_TEXT_MGA_STEP16 3 /* MGA Millenium I: text, attr, 14 reserved bytes */
#define FB_AUX_TEXT_MGA_STEP8 4 /* other MGAs: text, attr, 6 reserved bytes */
#define FB_AUX_TEXT_SVGA_GROUP 8 /* 8-15: SVGA tileblit compatible modes */
#define FB_AUX_TEXT_SVGA_MASK 7 /* lower three bits says step */
#define FB_AUX_TEXT_SVGA_STEP2 8 /* SVGA text mode: text, attr */
#define FB_AUX_TEXT_SVGA_STEP4 9 /* SVGA text mode: text, attr, 2 reserved bytes */
#define FB_AUX_TEXT_SVGA_STEP8 10 /* SVGA text mode: text, attr, 6 reserved bytes */
#define FB_AUX_TEXT_SVGA_STEP16 11 /* SVGA text mode: text, attr, 14 reserved bytes */
#define FB_AUX_TEXT_SVGA_LAST 15 /* reserved up to 15 */
#define FB_AUX_VGA_PLANES_VGA4 0 /* 16 color planes (EGA/VGA) */
#define FB_AUX_VGA_PLANES_CFB4 1 /* CFB4 in planes (VGA) */
#define FB_AUX_VGA_PLANES_CFB8 2 /* CFB8 in planes (VGA) */
#define FB_VISUAL_MONO01 0 /* Monochr. 1=Black 0=White */
#define FB_VISUAL_MONO10 1 /* Monochr. 1=White 0=Black */
#define FB_VISUAL_TRUECOLOR 2 /* True color */
#define FB_VISUAL_PSEUDOCOLOR 3 /* Pseudo color (like atari) */
#define FB_VISUAL_DIRECTCOLOR 4 /* Direct color */
#define FB_VISUAL_STATIC_PSEUDOCOLOR 5 /* Pseudo color readonly */
#define FB_ACCEL_NONE 0 /* no hardware accelerator */
#define FB_ACCEL_ATARIBLITT 1 /* Atari Blitter */
#define FB_ACCEL_AMIGABLITT 2 /* Amiga Blitter */
#define FB_ACCEL_S3_TRIO64 3 /* Cybervision64 (S3 Trio64) */
#define FB_ACCEL_NCR_77C32BLT 4 /* RetinaZ3 (NCR 77C32BLT) */
#define FB_ACCEL_S3_VIRGE 5 /* Cybervision64/3D (S3 ViRGE) */
#define FB_ACCEL_ATI_MACH64GX 6 /* ATI Mach 64GX family */
#define FB_ACCEL_DEC_TGA 7 /* DEC 21030 TGA */
#define FB_ACCEL_ATI_MACH64CT 8 /* ATI Mach 64CT family */
#define FB_ACCEL_ATI_MACH64VT 9 /* ATI Mach 64CT family VT class */
#define FB_ACCEL_ATI_MACH64GT 10 /* ATI Mach 64CT family GT class */
#define FB_ACCEL_SUN_CREATOR 11 /* Sun Creator/Creator3D */
#define FB_ACCEL_SUN_CGSIX 12 /* Sun cg6 */
#define FB_ACCEL_SUN_LEO 13 /* Sun leo/zx */
#define FB_ACCEL_IMS_TWINTURBO 14 /* IMS Twin Turbo */
#define FB_ACCEL_3DLABS_PERMEDIA2 15 /* 3Dlabs Permedia 2 */
#define FB_ACCEL_MATROX_MGA2064W 16 /* Matrox MGA2064W (Millenium) */
#define FB_ACCEL_MATROX_MGA1064SG 17 /* Matrox MGA1064SG (Mystique) */
#define FB_ACCEL_MATROX_MGA2164W 18 /* Matrox MGA2164W (Millenium II) */
#define FB_ACCEL_MATROX_MGA2164W_AGP 19 /* Matrox MGA2164W (Millenium II) */
#define FB_ACCEL_MATROX_MGAG100 20 /* Matrox G100 (Productiva G100) */
#define FB_ACCEL_MATROX_MGAG200 21 /* Matrox G200 (Myst, Mill, ...) */
#define FB_ACCEL_SUN_CG14 22 /* Sun cgfourteen */
#define FB_ACCEL_SUN_BWTWO 23 /* Sun bwtwo */
#define FB_ACCEL_SUN_CGTHREE 24 /* Sun cgthree */
#define FB_ACCEL_SUN_TCX 25 /* Sun tcx */
#define FB_ACCEL_MATROX_MGAG400 26 /* Matrox G400 */
#define FB_ACCEL_NV3 27 /* nVidia RIVA 128 */
#define FB_ACCEL_NV4 28 /* nVidia RIVA TNT */
#define FB_ACCEL_NV5 29 /* nVidia RIVA TNT2 */
#define FB_ACCEL_CT_6555x 30 /* C&T 6555x */
#define FB_ACCEL_3DFX_BANSHEE 31 /* 3Dfx Banshee */
#define FB_ACCEL_ATI_RAGE128 32 /* ATI Rage128 family */
#define FB_ACCEL_IGS_CYBER2000 33 /* CyberPro 2000 */
#define FB_ACCEL_IGS_CYBER2010 34 /* CyberPro 2010 */
#define FB_ACCEL_IGS_CYBER5000 35 /* CyberPro 5000 */
#define FB_ACCEL_SIS_GLAMOUR 36 /* SiS 300/630/540 */
#define FB_ACCEL_3DLABS_PERMEDIA3 37 /* 3Dlabs Permedia 3 */
#define FB_ACCEL_ATI_RADEON 38 /* ATI Radeon family */
#define FB_ACCEL_I810 39 /* Intel 810/815 */
#define FB_ACCEL_SIS_GLAMOUR_2 40 /* SiS 315, 650, 740 */
#define FB_ACCEL_SIS_XABRE 41 /* SiS 330 ("Xabre") */
#define FB_ACCEL_I830 42 /* Intel 830M/845G/85x/865G */
#define FB_ACCEL_NV_10 43 /* nVidia Arch 10 */
#define FB_ACCEL_NV_20 44 /* nVidia Arch 20 */
#define FB_ACCEL_NV_30 45 /* nVidia Arch 30 */
#define FB_ACCEL_NV_40 46 /* nVidia Arch 40 */
#define FB_ACCEL_XGI_VOLARI_V 47 /* XGI Volari V3XT, V5, V8 */
#define FB_ACCEL_XGI_VOLARI_Z 48 /* XGI Volari Z7 */
#define FB_ACCEL_OMAP1610 49 /* TI OMAP16xx */
#define FB_ACCEL_TRIDENT_TGUI 50 /* Trident TGUI */
#define FB_ACCEL_TRIDENT_3DIMAGE 51 /* Trident 3DImage */
#define FB_ACCEL_TRIDENT_BLADE3D 52 /* Trident Blade3D */
#define FB_ACCEL_TRIDENT_BLADEXP 53 /* Trident BladeXP */
#define FB_ACCEL_CIRRUS_ALPINE 53 /* Cirrus Logic 543x/544x/5480 */
#define FB_ACCEL_NEOMAGIC_NM2070 90 /* NeoMagic NM2070 */
#define FB_ACCEL_NEOMAGIC_NM2090 91 /* NeoMagic NM2090 */
#define FB_ACCEL_NEOMAGIC_NM2093 92 /* NeoMagic NM2093 */
#define FB_ACCEL_NEOMAGIC_NM2097 93 /* NeoMagic NM2097 */
#define FB_ACCEL_NEOMAGIC_NM2160 94 /* NeoMagic NM2160 */
#define FB_ACCEL_NEOMAGIC_NM2200 95 /* NeoMagic NM2200 */
#define FB_ACCEL_NEOMAGIC_NM2230 96 /* NeoMagic NM2230 */
#define FB_ACCEL_NEOMAGIC_NM2360 97 /* NeoMagic NM2360 */
#define FB_ACCEL_NEOMAGIC_NM2380 98 /* NeoMagic NM2380 */
#define FB_ACCEL_PXA3XX 99 /* PXA3xx */
#define FB_ACCEL_SAVAGE4 0x80 /* S3 Savage4 */
#define FB_ACCEL_SAVAGE3D 0x81 /* S3 Savage3D */
#define FB_ACCEL_SAVAGE3D_MV 0x82 /* S3 Savage3D-MV */
#define FB_ACCEL_SAVAGE2000 0x83 /* S3 Savage2000 */
#define FB_ACCEL_SAVAGE_MX_MV 0x84 /* S3 Savage/MX-MV */
#define FB_ACCEL_SAVAGE_MX 0x85 /* S3 Savage/MX */
#define FB_ACCEL_SAVAGE_IX_MV 0x86 /* S3 Savage/IX-MV */
#define FB_ACCEL_SAVAGE_IX 0x87 /* S3 Savage/IX */
#define FB_ACCEL_PROSAVAGE_PM 0x88 /* S3 ProSavage PM133 */
#define FB_ACCEL_PROSAVAGE_KM 0x89 /* S3 ProSavage KM133 */
#define FB_ACCEL_S3TWISTER_P 0x8a /* S3 Twister */
#define FB_ACCEL_S3TWISTER_K 0x8b /* S3 TwisterK */
#define FB_ACCEL_SUPERSAVAGE 0x8c /* S3 Supersavage */
#define FB_ACCEL_PROSAVAGE_DDR 0x8d /* S3 ProSavage DDR */
#define FB_ACCEL_PROSAVAGE_DDRK 0x8e /* S3 ProSavage DDR-K */
struct fb_fix_screeninfo { //是固定参数，是不能变的
char id[16]; /* identification string eg "TT Builtin" 驱动名字*/
unsigned long smem_start; /* Start of frame buffer mem 帧缓冲 内存开始地址,物理地址*/
/* (physical address) */
__u32 smem_len; /* Length of frame buffer mem /dev/fb0帧缓存内存的大小*/
__u32 type; /* see FB_TYPE_* */
__u32 type_aux; /* Interleave for interleaved Planes */
__u32 visual; /* see FB_VISUAL_* */
__u16 xpanstep; /* zero if no hardware panning */
__u16 ypanstep; /* zero if no hardware panning */
__u16 ywrapstep; /* zero if no hardware ywrap */
__u32 line_length; /* length of a line in bytes 屏幕上一行的点在内存中占有的空间 */
unsigned long mmio_start; /* Start of Memory Mapped I/O 内存映射IO开始地址 物理地址 */
/* (physical address) */
__u32 mmio_len; /* Length of Memory Mapped I/O 内存映射IO 长度 */
__u32 accel; /* Indicate to driver which */
/* specific chip/card we have */
__u16 reserved[3]; /* Reserved for future compatibility */
};
/* Interpretation of offset for color fields: All offsets are from the right,
* inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you
* can use the offset as right argument to <<). A pixel afterwards is a bit
* stream and is written to video memory as that unmodified.
*
* For pseudocolor: offset and length should be the same for all color
* components. Offset specifies the position of the least significant bit
* of the pallette index in a pixel value. Length indicates the number
* of available palette entries (i.e. # of entries = 1 << length).
*/
struct fb_bitfield {
__u32 offset; /* beginning of bitfield */
__u32 length; /* length of bitfield */
__u32 msb_right; /* != 0 : Most significant bit is */
/* right */
};
#define FB_NONSTD_HAM 1 /* Hold-And-Modify (HAM) */
#define FB_NONSTD_REV_PIX_IN_B 2 /* order of pixels in each byte is reversed */
#define FB_ACTIVATE_NOW 0 /* set values immediately (or vbl)*/
#define FB_ACTIVATE_NXTOPEN 1 /* activate on next open */
#define FB_ACTIVATE_TEST 2 /* don't set, round up impossible */
#define FB_ACTIVATE_MASK 15
/* values */
#define FB_ACTIVATE_VBL 16 /* activate values on next vbl */
#define FB_CHANGE_CMAP_VBL 32 /* change colormap on vbl */
#define FB_ACTIVATE_ALL 64 /* change all VCs on this fb */
#define FB_ACTIVATE_FORCE 128 /* force apply even when no change*/
#define FB_ACTIVATE_INV_MODE 256 /* invalidate videomode */
#define FB_ACCELF_TEXT 1 /* (OBSOLETE) see fb_info.flags and vc_mode */
#define FB_SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active */
#define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */
#define FB_SYNC_EXT 4 /* external sync */
#define FB_SYNC_COMP_HIGH_ACT 8 /* composite sync high active */
#define FB_SYNC_BROADCAST 16 /* broadcast video timings */
/* vtotal = 144d/288n/576i => PAL */
/* vtotal = 121d/242n/484i => NTSC */
#define FB_SYNC_ON_GREEN 32 /* sync on green */
#define FB_VMODE_NONINTERLACED 0 /* non interlaced */
#define FB_VMODE_INTERLACED 1 /* interlaced */
#define FB_VMODE_DOUBLE 2 /* double scan */
#define FB_VMODE_ODD_FLD_FIRST 4 /* interlaced: top line first */
#define FB_VMODE_MASK 255
#define FB_VMODE_YWRAP 256 /* ywrap instead of panning */
#define FB_VMODE_SMOOTH_XPAN 512 /* smooth xpan possible (internally used) */
#define FB_VMODE_CONUPDATE 512 /* don't update x/yoffset */
/*
* Display rotation support
*/
#define FB_ROTATE_UR 0
#define FB_ROTATE_CW 1
#define FB_ROTATE_UD 2
#define FB_ROTATE_CCW 3
#define PICOS2KHZ(a) (1000000000UL/(a))
#define KHZ2PICOS(a) (1000000000UL/(a))
struct fb_var_screeninfo { //可变参数
__u32 xres; /* visible resolution 视觉上的分辨率：x和y方向的分辨率，就是两个方向上的点数*/
__u32 yres;
__u32 xres_virtual; /* virtual resolution 虚拟分辨率*/
__u32 yres_virtual;
__u32 xoffset; /* offset from virtual to visible */
__u32 yoffset; /* resolution */
__u32 bits_per_pixel; /* guess what 每一点占有的bit位 */
__u32 grayscale; /* != 0 Graylevels instead of colors */
struct fb_bitfield red; /* bitfield in fb mem if true color, */
struct fb_bitfield green; /* else only length is significant */
struct fb_bitfield blue;
struct fb_bitfield transp; /* transparency */
__u32 nonstd; /* != 0 Non standard pixel format */
__u32 activate; /* see FB_ACTIVATE_* */
__u32 height; /* height of picture in mm */
__u32 width; /* width of picture in mm */
__u32 accel_flags; /* (OBSOLETE) see fb_info.flags */
/* Timing: All values in pixclocks, except pixclock (of course) */
__u32 pixclock; /* pixel clock in ps (pico seconds) */
__u32 left_margin; /* time from sync to picture */
__u32 right_margin; /* time from picture to sync */
__u32 upper_margin; /* time from sync to picture */
__u32 lower_margin;
__u32 hsync_len; /* length of horizontal sync */
__u32 vsync_len; /* length of vertical sync */
__u32 sync; /* see FB_SYNC_* */
__u32 vmode; /* see FB_VMODE_* */
__u32 rotate; /* angle we rotate counter clockwise */
__u32 reserved[5]; /* Reserved for future compatibility */
};
struct fb_cmap {
__u32 start; /* First entry */
__u32 len; /* Number of entries */
__u16 *red; /* Red values */
__u16 *green;
__u16 *blue;
__u16 *transp; /* transparency, can be NULL */
};
struct fb_con2fbmap {
__u32 console;
__u32 framebuffer;
};
/* VESA Blanking Levels */
#define VESA_NO_BLANKING 0
#define VESA_VSYNC_SUSPEND 1
#define VESA_HSYNC_SUSPEND 2
#define VESA_POWERDOWN 3
enum {
/* screen: unblanked, hsync: on, vsync: on */
FB_BLANK_UNBLANK = VESA_NO_BLANKING,
/* screen: blanked, hsync: on, vsync: on */
FB_BLANK_NORMAL = VESA_NO_BLANKING + 1,
/* screen: blanked, hsync: on, vsync: off */
FB_BLANK_VSYNC_SUSPEND = VESA_VSYNC_SUSPEND + 1,
/* screen: blanked, hsync: off, vsync: on */
FB_BLANK_HSYNC_SUSPEND = VESA_HSYNC_SUSPEND + 1,
/* screen: blanked, hsync: off, vsync: off */
FB_BLANK_POWERDOWN = VESA_POWERDOWN + 1
};
#define FB_VBLANK_VBLANKING 0x001 /* currently in a vertical blank */
#define FB_VBLANK_HBLANKING 0x002 /* currently in a horizontal blank */
#define FB_VBLANK_HAVE_VBLANK 0x004 /* vertical blanks can be detected */
#define FB_VBLANK_HAVE_HBLANK 0x008 /* horizontal blanks can be detected */
#define FB_VBLANK_HAVE_COUNT 0x010 /* global retrace counter is available */
#define FB_VBLANK_HAVE_VCOUNT 0x020 /* the vcount field is valid */
#define FB_VBLANK_HAVE_HCOUNT 0x040 /* the hcount field is valid */
#define FB_VBLANK_VSYNCING 0x080 /* currently in a vsync */
#define FB_VBLANK_HAVE_VSYNC 0x100 /* verical syncs can be detected */
struct fb_vblank {
__u32 flags; /* FB_VBLANK flags */
__u32 count; /* counter of retraces since boot */
__u32 vcount; /* current scanline position */
__u32 hcount; /* current scandot position */
__u32 reserved[4]; /* reserved for future compatibility */
};
/* Internal HW accel */
#define ROP_COPY 0
#define ROP_XOR 1
struct fb_copyarea {
__u32 dx;
__u32 dy;
__u32 width;
__u32 height;
__u32 sx;
__u32 sy;
};
struct fb_fillrect {
__u32 dx; /* screen-relative */
__u32 dy;
__u32 width;
__u32 height;
__u32 color;
__u32 rop;
};
struct fb_image {
__u32 dx; /* Where to place image */
__u32 dy;
__u32 width; /* Size of image */
__u32 height;
__u32 fg_color; /* Only used when a mono bitmap */
__u32 bg_color;
__u8 depth; /* Depth of the image */
const char *data; /* Pointer to image data */
struct fb_cmap cmap; /* color map info */
};
/*
* hardware cursor control
*/
#define FB_CUR_SETIMAGE 0x01
#define FB_CUR_SETPOS 0x02
#define FB_CUR_SETHOT 0x04
#define FB_CUR_SETCMAP 0x08
#define FB_CUR_SETSHAPE 0x10
#define FB_CUR_SETSIZE 0x20
#define FB_CUR_SETALL 0xFF
struct fbcurpos {
__u16 x, y;
};
struct fb_cursor {
__u16 set; /* what to set */
__u16 enable; /* cursor on/off */
__u16 rop; /* bitop operation */
const char *mask; /* cursor mask bits */
struct fbcurpos hot; /* cursor hot spot */
struct fb_image image; /* Cursor image */
};
#ifdef CONFIG_FB_BACKLIGHT
/* Settings for the generic backlight code */
#define FB_BACKLIGHT_LEVELS 128
#define FB_BACKLIGHT_MAX 0xFF
#endif
#endif /* _LINUX_FB_H */