如果有必要那么我们可以使用qvfb开发自己的GUI图形引擎,qvfb是一个模拟/dev/fb0的framebuffer显示方式的应用程序,使用共享内存,外部程序比如minigui传递数据到qvfb建立的共享内存,之后qvfb将数据刷新到qvfb软件界面上,需要注意的是,qvfb并不是严格意义上的framebuffer,当minigui将数据发送到qvfb的共享内存之后,qvfb并不会立即将修改的数据反应到qvfb的软件界面上,
而是需要外部程序,比如minigui,首先设置qvfb创建的共享空间结构体下面的update矩形失效范围,即(left,top)和(right,bottom),
然后设置qvfb创建的共享空间结构体下面的dirty控制字为1,
这样qvfb检测到drity标志为1后,将取出update中待刷新矩形描述区间,然后将update指定
区间中的数据刷新到qvfb界面上,之后qvfb将共享空间的drity标志置0,同时将update设为无效的(0,0)和(-1,-1)
下面是linux下应用程序向qvfb发送数据,然后drity显示的源码,仅供研究[luther.gliethttp]
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| 文件: | qvfb-1.1.tar.gz |
| 大小: | 777KB |
| 下载: | 下载 |
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// 本代码仅供研究[luther.gliethttp]
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <string.h>
#define QT_VFB_MOUSE_PIPE "/tmp/.qtvfb_mouse-%d"
#define QT_VFB_KEYBOARD_PIPE "/tmp/.qtvfb_keyboard-%d"
typedef struct _RECT
{
int left;int top;int right;int bottom;
} RECT;
struct QVFbHeader
{
int width;
int height;
int depth;
int linestep;
int dataoffset;
RECT update;
unsigned char dirty;
int numcols;
unsigned int clut[256];
};
struct _fb {
struct QVFbHeader *hdr;
unsigned char *data;
int size;
int BitsPerPixel;
int BytesPerPixel;
int linesize;
int Rmask;
int Gmask;
int Bmask;
int Amask;
};
unsigned char* shmrgn;
void lu_printf_hdr(struct QVFbHeader *hdr, const char *prefix)
{
printf("=====[luther.gliethttp] %s=====\n"
"width\t= %d\n"
"height\t= %d\n"
"depth\t= %d\n"
"linestep= %d\n"
"dataoffs= %d\n"
"dirty\t= %d\n"
"numcols\t= %d\n"
"left\t= %d\n"
"top\t= %d\n"
"right\t= %d\n"
"bottom\t= %d\n",
prefix,
hdr->width,
hdr->height,
hdr->depth,
hdr->linestep,
hdr->dataoffset,
hdr->dirty,
hdr->numcols,
hdr->update.left,
hdr->update.top,
hdr->update.right,
hdr->update.bottom);
}
int main(void)
{
char file [50];
int display;
key_t key;
int shmid;
struct QVFbHeader *hdr;
struct _fb fb;
int i;
RECT rect;
display = 0;
sprintf (file, QT_VFB_MOUSE_PIPE, display);
key = ftok (file, 'b');
shmid = shmget (key, 0, 0);
if (shmid != -1)
shmrgn = (unsigned char *)shmat (shmid, 0, 0);
else {
printf("[luther.gliethttp] shmid=-1\n");
return -1;
}
fb.hdr = hdr = (struct QVFbHeader *) shmrgn;
lu_printf_hdr(fb.hdr,"1111111111");
fb.data = (char *)hdr + hdr->dataoffset;
fb.linesize = hdr->linestep;
fb.BitsPerPixel = hdr->depth;
switch (fb.BitsPerPixel) {
case 8:
fb.BytesPerPixel = 1;
hdr->numcols = 256;
break;
case 12:
fb.BitsPerPixel = 16;
fb.BytesPerPixel = 2;
fb.Rmask = 0x00000F00;
fb.Gmask = 0x000000F0;
fb.Bmask = 0x0000000F;
break;
case 16:
fb.BytesPerPixel = 2;
fb.Rmask = 0x0000F800; // R:G:B=5:6:5模式
fb.Gmask = 0x000007E0;
fb.Bmask = 0x0000001F;
break;
case 32:
fb.BytesPerPixel = 4;
fb.Rmask = 0x00FF0000;
fb.Gmask = 0x0000FF00;
fb.Bmask = 0x000000FF;
break;
default:
printf("[luther.gliethttp] bits error!\n");
return -1;
}
for (i = 0; i < fb.hdr->height; i++) {
memset(fb.data + i*fb.linesize, 0x9a, fb.linesize);
}
for (i = 1; i < (6*fb.linesize+1); i++) {
printf("%04x ", ((unsigned short *)fb.data)[i]);
if ((i & 0xf) == 0)
printf("\n");
// memset(&fb.data[i*fb.linesize], 0x23, fb.linesize);
}
printf("\n");
rect.left = 0;
rect.top = 0;
rect.right = fb.hdr->width/2; // 仅刷新一半,如果拖动qvfb窗体,另外一个可以出现[luther.gliethttp]
rect.bottom = fb.hdr->height;
hdr->update = rect;
hdr->dirty = 1;
lu_printf_hdr(fb.hdr,"22222222");
sleep(5);
lu_printf_hdr(fb.hdr,"33333333");
rect.right = fb.hdr->width; // 让整个屏幕所在矩形都执行刷新
for (;;) {
for (i = 0; i < fb.hdr->height; i += 120) {
memset(fb.data + i*fb.linesize, rand() & 0xff, fb.linesize*120);
}
hdr->update = rect;
hdr->dirty = 1; // qvfb软件读取到该共享内存中dirty标志置位后刷新update所描述的矩形空间[luther.gliethttp]
usleep(300*1000);
}
shmdt (fb.hdr);
return 0;
}
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// 本代码仅供个人学习研究,版权归MiniGUI所有.[luther.gliethttp]
#include <stdio.h>
#include <fcntl.h>
#include <sys/select.h>
#define QT_VFB_MOUSE_PIPE "/tmp/.qtvfb_mouse-%d" // pipe管道文件[luther.gliethttp]
#define QT_VFB_KEYBOARD_PIPE "/tmp/.qtvfb_keyboard-%d" // pipe管道文件[luther.gliethttp]
#define SCANCODE_ESCAPE 1
#define SCANCODE_1 2
#define SCANCODE_2 3
#define SCANCODE_3 4
#define SCANCODE_4 5
#define SCANCODE_5 6
#define SCANCODE_6 7
#define SCANCODE_7 8
#define SCANCODE_8 9
#define SCANCODE_9 10
#define SCANCODE_0 11
#define SCANCODE_MINUS 12
#define SCANCODE_EQUAL 13
#define SCANCODE_BACKSPACE 14
#define SCANCODE_TAB 15
#define SCANCODE_Q 16
#define SCANCODE_W 17
#define SCANCODE_E 18
#define SCANCODE_R 19
#define SCANCODE_T 20
#define SCANCODE_Y 21
#define SCANCODE_U 22
#define SCANCODE_I 23
#define SCANCODE_O 24
#define SCANCODE_P 25
#define SCANCODE_BRACKET_LEFT 26
#define SCANCODE_BRACKET_RIGHT 27
#define SCANCODE_ENTER 28
#define SCANCODE_LEFTCONTROL 29
#define SCANCODE_A 30
#define SCANCODE_S 31
#define SCANCODE_D 32
#define SCANCODE_F 33
#define SCANCODE_G 34
#define SCANCODE_H 35
#define SCANCODE_J 36
#define SCANCODE_K 37
#define SCANCODE_L 38
#define SCANCODE_SEMICOLON 39
#define SCANCODE_APOSTROPHE 40
#define SCANCODE_GRAVE 41
#define SCANCODE_LEFTSHIFT 42
#define SCANCODE_BACKSLASH 43
#define SCANCODE_Z 44
#define SCANCODE_X 45
#define SCANCODE_C 46
#define SCANCODE_V 47
#define SCANCODE_B 48
#define SCANCODE_N 49
#define SCANCODE_M 50
#define SCANCODE_COMMA 51
#define SCANCODE_PERIOD 52
#define SCANCODE_SLASH 53
#define SCANCODE_RIGHTSHIFT 54
#define SCANCODE_KEYPADMULTIPLY 55
#define SCANCODE_LEFTALT 56
#define SCANCODE_SPACE 57
#define SCANCODE_CAPSLOCK 58
#define SCANCODE_F1 59
#define SCANCODE_F2 60
#define SCANCODE_F3 61
#define SCANCODE_F4 62
#define SCANCODE_F5 63
#define SCANCODE_F6 64
#define SCANCODE_F7 65
#define SCANCODE_F8 66
#define SCANCODE_F9 67
#define SCANCODE_F10 68
#define SCANCODE_NUMLOCK 69
#define SCANCODE_SCROLLLOCK 70
#define SCANCODE_KEYPAD7 71
#define SCANCODE_CURSORUPLEFT 71
#define SCANCODE_KEYPAD8 72
#define SCANCODE_CURSORUP 72
#define SCANCODE_KEYPAD9 73
#define SCANCODE_CURSORUPRIGHT 73
#define SCANCODE_KEYPADMINUS 74
#define SCANCODE_KEYPAD4 75
#define SCANCODE_CURSORLEFT 75
#define SCANCODE_KEYPAD5 76
#define SCANCODE_KEYPAD6 77
#define SCANCODE_CURSORRIGHT 77
#define SCANCODE_KEYPADPLUS 78
#define SCANCODE_KEYPAD1 79
#define SCANCODE_CURSORDOWNLEFT 79
#define SCANCODE_KEYPAD2 80
#define SCANCODE_CURSORDOWN 80
#define SCANCODE_KEYPAD3 81
#define SCANCODE_CURSORDOWNRIGHT 81
#define SCANCODE_KEYPAD0 82
#define SCANCODE_KEYPADPERIOD 83
#define SCANCODE_LESS 86
#define SCANCODE_F11 87
#define SCANCODE_F12 88
#define SCANCODE_KEYPADENTER 96
#define SCANCODE_RIGHTCONTROL 97
#define SCANCODE_CONTROL 97
#define SCANCODE_KEYPADDIVIDE 98
#define SCANCODE_PRINTSCREEN 99
#define SCANCODE_RIGHTALT 100
#define SCANCODE_BREAK 101 /* Beware: is 119 */
#define SCANCODE_BREAK_ALTERNATIVE 119 /* on some keyboards! */
#define SCANCODE_HOME 102
#define SCANCODE_CURSORBLOCKUP 103 /* Cursor key block */
#define SCANCODE_PAGEUP 104
#define SCANCODE_CURSORBLOCKLEFT 105 /* Cursor key block */
#define SCANCODE_CURSORBLOCKRIGHT 106 /* Cursor key block */
#define SCANCODE_END 107
#define SCANCODE_CURSORBLOCKDOWN 108 /* Cursor key block */
#define SCANCODE_PAGEDOWN 109
#define SCANCODE_INSERT 110
#define SCANCODE_REMOVE 111
#define SCANCODE_PAUSE 119
#define SCANCODE_POWER 120
#define SCANCODE_SLEEP 121
#define SCANCODE_WAKEUP 122
#define SCANCODE_LEFTWIN 125
#define SCANCODE_RIGHTWIN 126
#define SCANCODE_MENU 127
#define SCANCODE_LEFTBUTTON 0x1000
#define SCANCODE_RIGHTBUTTON 0x2000
#define SCANCODE_MIDDLBUTTON 0x4000
#define NOBUTTON 0x0000
#define LEFTBUTTON 0x0001
#define RIGHTBUTTON 0x0002
#define MIDBUTTON 0x0004
#define MOUSEBUTTONMASK 0x00FF
#define SHIFTBUTTON 0x0100
#define CONTROLBUTTON 0x0200
#define ALTBUTTON 0x0400
#define METABUTTON 0x0800
#define KEYBUTTONMASK 0x0FFF
#define KEYPAD 0x4000
struct QVFbKeyData
{
#define NR_KEYS 128
unsigned int unicode;
unsigned int modifiers;
unsigned char press;
unsigned char repeat;
};
typedef struct _POINT
{
int x;int y;
} POINT, *PPOINT;
static int mouse_fd = -1;
static int kbd_fd = -1;
static POINT mouse_pt;
static int mouse_buttons;
static struct QVFbKeyData kbd_data;
static unsigned char kbd_state [NR_KEYS];
static unsigned char keycode_scancode [256];
// 本代码源自libminigui-1.6.10/src/ial/qvfb.c
static void init_code_map (void)
{
keycode_scancode [0x00] = SCANCODE_ESCAPE;
keycode_scancode [0x29] = SCANCODE_0;
keycode_scancode [0x21] = SCANCODE_1;
keycode_scancode [0x40] = SCANCODE_2;
keycode_scancode [0x23] = SCANCODE_3;
keycode_scancode [0x24] = SCANCODE_4;
keycode_scancode [0x25] = SCANCODE_5;
keycode_scancode [0x5E] = SCANCODE_6;
keycode_scancode [0x26] = SCANCODE_7;
keycode_scancode [0x2A] = SCANCODE_8;
keycode_scancode [0x28] = SCANCODE_9;
keycode_scancode [0x30] = SCANCODE_0;
keycode_scancode [0x31] = SCANCODE_1;
keycode_scancode [0x32] = SCANCODE_2;
keycode_scancode [0x33] = SCANCODE_3;
keycode_scancode [0x34] = SCANCODE_4;
keycode_scancode [0x35] = SCANCODE_5;
keycode_scancode [0x36] = SCANCODE_6;
keycode_scancode [0x37] = SCANCODE_7;
keycode_scancode [0x38] = SCANCODE_8;
keycode_scancode [0x39] = SCANCODE_9;
keycode_scancode [0x2D] = SCANCODE_MINUS;
keycode_scancode [0x5F] = SCANCODE_MINUS;
keycode_scancode [0x3D] = SCANCODE_EQUAL;
keycode_scancode [0x2B] = SCANCODE_EQUAL;
keycode_scancode [0x03] = SCANCODE_BACKSPACE;
keycode_scancode [0x01] = SCANCODE_TAB;
keycode_scancode [0x51] = SCANCODE_Q;
keycode_scancode [0x57] = SCANCODE_W;
keycode_scancode [0x45] = SCANCODE_E;
keycode_scancode [0x52] = SCANCODE_R;
keycode_scancode [0x54] = SCANCODE_T;
keycode_scancode [0x59] = SCANCODE_Y;
keycode_scancode [0x55] = SCANCODE_U;
keycode_scancode [0x49] = SCANCODE_I;
keycode_scancode [0x4F] = SCANCODE_O;
keycode_scancode [0x50] = SCANCODE_P;
keycode_scancode [0x5B] = SCANCODE_BRACKET_LEFT;
keycode_scancode [0x7B] = SCANCODE_BRACKET_LEFT;
keycode_scancode [0x5D] = SCANCODE_BRACKET_RIGHT;
keycode_scancode [0x7D] = SCANCODE_BRACKET_RIGHT;
keycode_scancode [0x04] = SCANCODE_ENTER;
keycode_scancode [0x41] = SCANCODE_A;
keycode_scancode [0x53] = SCANCODE_S;
keycode_scancode [0x44] = SCANCODE_D;
keycode_scancode [0x46] = SCANCODE_F;
keycode_scancode [0x47] = SCANCODE_G;
keycode_scancode [0x48] = SCANCODE_H;
keycode_scancode [0x4A] = SCANCODE_J;
keycode_scancode [0x4B] = SCANCODE_K;
keycode_scancode [0x4C] = SCANCODE_L;
keycode_scancode [0x3A] = SCANCODE_SEMICOLON;
keycode_scancode [0x3B] = SCANCODE_SEMICOLON;
keycode_scancode [0x27] = SCANCODE_APOSTROPHE;
keycode_scancode [0x22] = SCANCODE_APOSTROPHE;
keycode_scancode [0x60] = SCANCODE_GRAVE;
keycode_scancode [0x7E] = SCANCODE_GRAVE;
keycode_scancode [0x20] = SCANCODE_SPACE;
keycode_scancode [0x5C] = SCANCODE_BACKSLASH;
keycode_scancode [0x7C] = SCANCODE_BACKSLASH;
keycode_scancode [0x5A] = SCANCODE_Z;
keycode_scancode [0x58] = SCANCODE_X;
keycode_scancode [0x43] = SCANCODE_C;
keycode_scancode [0x56] = SCANCODE_V;
keycode_scancode [0x42] = SCANCODE_B;
keycode_scancode [0x4E] = SCANCODE_N;
keycode_scancode [0x4D] = SCANCODE_M;
keycode_scancode [0x2C] = SCANCODE_COMMA;
keycode_scancode [0x3C] = SCANCODE_COMMA;
keycode_scancode [0x2E] = SCANCODE_PERIOD;
keycode_scancode [0x3E] = SCANCODE_PERIOD;
keycode_scancode [0x2F] = SCANCODE_SLASH;
keycode_scancode [0x3F] = SCANCODE_SLASH;
keycode_scancode [0x09] = SCANCODE_PRINTSCREEN;
keycode_scancode [0x08] = SCANCODE_BREAK;
keycode_scancode [0x06] = SCANCODE_INSERT;
keycode_scancode [0x07] = SCANCODE_REMOVE;
keycode_scancode [0x10] = SCANCODE_HOME;
keycode_scancode [0x11] = SCANCODE_END;
keycode_scancode [0x16] = SCANCODE_PAGEUP;
keycode_scancode [0x17] = SCANCODE_PAGEDOWN;
keycode_scancode [0x13] = SCANCODE_CURSORBLOCKUP;
keycode_scancode [0x12] = SCANCODE_CURSORBLOCKLEFT;
keycode_scancode [0x14] = SCANCODE_CURSORBLOCKRIGHT;
keycode_scancode [0x15] = SCANCODE_CURSORBLOCKDOWN;
}
static unsigned char keycode_to_scancode (unsigned char keycode, char asscii)
{
if(!asscii)
{
switch (keycode) {
case 0x30 ... 0x39:
return SCANCODE_F1 + keycode - 0x30;
case 0x3B:
return SCANCODE_F12;
case 0x20:
return SCANCODE_LEFTSHIFT;
case 0x21:
return SCANCODE_LEFTCONTROL;
case 0x23:
return SCANCODE_LEFTALT;
case 0x24:
return SCANCODE_CAPSLOCK;
case 0x25:
return SCANCODE_NUMLOCK;
case 0x26:
return SCANCODE_SCROLLLOCK;
case 0x3A:
return SCANCODE_F11;
}
}
return keycode_scancode [keycode];
}
static int mouse_update (void)
{
int ret1, ret2;
POINT l_mouse_pt;
int l_mouse_buttons;
ret1 = read (mouse_fd, &l_mouse_pt, sizeof (POINT));
ret2 = read (mouse_fd, &l_mouse_buttons, sizeof (int));
if (ret1 == sizeof (POINT) && ret2 && sizeof (int)
&& l_mouse_buttons < 0x08) {
mouse_pt = l_mouse_pt;
mouse_buttons = l_mouse_buttons;
}
else
return 0;
return 1;
}
static void mouse_getxy (int *x, int* y)
{
*x = mouse_pt.x;
*y = mouse_pt.y;
}
static int mouse_getbutton (void)
{
int buttons = 0;
if (mouse_buttons & LEFTBUTTON)
buttons |= 1;
if (mouse_buttons & RIGHTBUTTON)
buttons |= 4;
if (mouse_buttons & MIDBUTTON)
buttons |= 2;
return buttons;
}
static unsigned char nr_changed_keys = 0;
static int keyboard_update (void)
{
return nr_changed_keys;
}
static int read_key (void)
{
static unsigned char last;
struct QVFbKeyData l_kbd_data;
int ret;
unsigned char scancode;
ret = read (kbd_fd, &l_kbd_data, sizeof (struct QVFbKeyData));
if (ret == sizeof (struct QVFbKeyData)) {
kbd_data = l_kbd_data;
}
else
return 0;
if (kbd_data.repeat) {
return 0;
}
if (kbd_data.unicode == 0 && !kbd_data.press) {
kbd_state [last] = 0;
}
else {
scancode = keycode_to_scancode ((kbd_data.unicode >> 16) & 0x00FF,
kbd_data.unicode & 0x00FF);
kbd_state [scancode] = kbd_data.press ? 1 : 0;
last = scancode;
}
nr_changed_keys = last + 1;
return 1;
}
static const char* keyboard_getstate (void)
{
return (char*)kbd_state;
}
int main(void)
{
char file [50];
int display = 0;
fd_set rfds;
/* open mouse pipe */
sprintf (file, QT_VFB_MOUSE_PIPE, display);
if ((mouse_fd = open (file, O_RDONLY)) < 0) {
fprintf (stderr, "QVFB IAL engine: can not open mouse pipe.\n");
return -1;
}
/* open keyboard pipe */
sprintf (file, QT_VFB_KEYBOARD_PIPE, display);
if ((kbd_fd = open (file, O_RDONLY)) < 0) {
fprintf (stderr, "QVFB IAL engine: can not open keyboard pipe.\n");
return -1;
}
init_code_map();
for (;;) {
FD_ZERO(&rfds);
FD_SET(mouse_fd, &rfds);
FD_SET(kbd_fd, &rfds);
if ( select(FD_SETSIZE, &rfds, 0, 0, 0) > 0 ) {
if ( mouse_fd >= 0 && FD_ISSET (mouse_fd, &rfds) ) {
if ( mouse_update() ) {
int x,y,buttons;
mouse_getxy(&x, &y);
buttons = mouse_getbutton();
printf("[mouse] [%04d,%04d,%01d]\n", x, y, buttons);
}
}
if (kbd_fd >=0 && FD_ISSET (kbd_fd, &rfds) ) {
if ( read_key() ) {
const char *kbd = keyboard_getstate();
int key_updated = keyboard_update() - 1;
printf("[keyborad] [%02d,%d]\n",
key_updated,
kbd[key_updated]);
// kbd_data.unicode,
// kbd_data.modifiers,
// kbd_data.press,
// kbd_data.repeat);
}
}
}
}
}
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