#if?0
#include?
#include?
#include?
#include?
#include?
#include?

int?main（）
{
????int?fbfd?=?0;
????struct?fb_var_screeninfo?vinfo;
????struct?fb_fix_screeninfo?finfo;
????long?int?screensize?=?0;
????char?*fbp?=?0;
????int?x?=?0?y?=?0;
????long?int?location?=?0;
????fbfd?=?open（“/dev/fb0“?O_RDWR）;
????if?（!fbfd）?{
????????printf（“Error:?cannot?open?framebuffer?device.\n“）;
????????exit（1）;
????}
????printf（“The?framebuffer?device?was?opened?successfully.\n“）;
????if?（ioctl（fbfd?FBIOGET_FSCREENINFO?&finfo））?{
????????printf（“Error?reading?fixed?information.\n“）;
????????exit（2）;
????}
????if?（ioctl（fbfd?FBIOGET_VSCREENINFO?&vinfo））?{
????????printf（“Error?reading?variable?information.\n“）;
????????exit（3）;
????}
????printf（“%dx%d?%dbpp\n“?vinfo.xres?vinfo.yres?vinfo.bits_per_pixel?）;
????screensize?=?vinfo.xres?*?vinfo.yres?*?vinfo.bits_per_pixel?/?8;
????fbp?=?（char?*）mmap（0?screensize?PROT_READ?|?PROT_WRITE?MAP_SHARED
???????????????????????fbfd?0）;
????if?（（int）fbp?==?-1）?{
????????printf（“Error:?failed?to?map?framebuffer?device?to?memory.\n“）;
????????exit（4）;
????}
????printf（“l(fā)sq--1->The?framebuffer?device?was?mapped?to?memory?successfully.\n“）;
????x?=?100;
????y?=?100;
????for?（?y?=?100;?y?????????for?（?x?=?100;?x?????????????location?=?（x?+?vinfo.xoffset）?*?（vinfo.bits_per_pixel?/?8）?+
???????????????????????（y?+?vinfo.yoffset）?*?finfo.line_length;
????????????if?（?vinfo.bits_per_pixel?==?32?）?{
????????????????*（fbp?+?location）?=?100;
????????????????*（fbp?+?location?+?1）?=?15?+?（x?-?100）?/?2;
????????????????*（fbp?+?location?+?2）?=?200?-?（y?-?100）?/?5;
????????????????*（fbp?+?location?+?3）?=?0;
????????????}?else??{
????????????????int?b?=?10;
????????????????int?g?=?（x?-?100）?/?6;
????????????????int?r?=?31?-?（y?-?100）?/?16;
????????????????unsigned?short?int?t?=?r?<????????????????*（（unsigned?short?int*）（fbp?+?location））?=?t;
????????????}
????????}
????munmap（fbp?screensize）;
????close（fbfd）;
????printf（“l(fā)sq--2->??close（fbfd）.\n“）;
????return?0;
}

#endif

#include?
#include?
?#include?
?#include?
?#include?
?#include?
?#include?

?int?main（）
?{
?????int?fbfd?=?0;
?????struct?fb_var_screeninfo?vinfo;
?????struct?fb_fix_screeninfo?finfo;
?????long?int?screensize?=?0;
?????char?*fbp?=?0;
?????int?x?=?0?y?=?0;
?????long?int?location?=?0;
?????int?startx=0?starty=0;
?????int?width?height;

?????//?Open?the?file?for?reading?and?writing
?????fbfd?=?open（“/dev/fb0“?O_RDWR）;
?????if?（fbfd?==?-1）?{
?????????perror（“Error:?cannot?open?framebuffer?device“）;
?????????exit（1）;
?????}
?????printf（“The?framebuffer?device?was?opened?successfully.\n“）;

?????//?Get?fixed?screen?information
?????if?（ioctl（fbfd?FBIOGET_FSCREENINFO?&finfo）?==?-1）?{
?????????perror（“Error?reading?fixed?information“）;
?????????exit（2）;
?????}

?????//?Get?variable?sc

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----

?????文件???????4925??2017-05-12?15:23??linux?fb-test-幀緩沖?兩個(gè)例子（完整源代碼）\fb-test1.c

?????文件???????1945??2017-05-12?15:16??linux?fb-test-幀緩沖?兩個(gè)例子（完整源代碼）\fb-tst2.c

?????文件??????13224??2017-05-12?15:23??linux?fb-test-幀緩沖?兩個(gè)例子（完整源代碼）\test1

?????文件???????9344??2017-05-12?15:22??linux?fb-test-幀緩沖?兩個(gè)例子（完整源代碼）\test2

?????文件????????724??2017-05-12?16:03??linux?fb-test-幀緩沖?兩個(gè)例子（完整源代碼）\在Ubuntu16.04系統(tǒng)下測(cè)試幀緩沖（frame?buffer）的說(shuō)明.txt

?????目錄??????????0??2017-06-18?18:05??linux?fb-test-幀緩沖?兩個(gè)例子（完整源代碼）

-----------?---------??----------?-----??----

????????????????30162????????????????????6