Changes between Initial Version and Version 1 of jazz/09-02-01

Timestamp:

Feb 1, 2009, 2:35:27 PM (17 years ago)

Author:

jazz

Comment:

--

jazz/09-02-01

@@ +1 @@
+= 2009-02-01 =
+
+== BUGFIX: jfbterm (5) ==
+
+ * （續 [wiki:jazz/08-11-15 08-11-15@GMT-6 BUGFIX: jfbterm (1)]）
+ * （續 [wiki:jazz/08-11-16 08-11-16@GMT-6 BUGFIX: jfbterm (2)]）
+ * （續 [wiki:jazz/08-11-17 08-11-17@GMT-6 BUGFIX: jfbterm (3)]）
+ * （續 [wiki:jazz/09-01-14 09-01-14@GMT+8 BUGFIX: jfbterm (4)]）
+
+{{{
+#!C
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <linux/fb.h>       // include frame buffer header files
+#include <sys/ioctl.h>
+
+int main(void)
+{
+  int fbfd = 0 ;            // frame buffer file description
+
+  /* Get device independent unchangeable information about a frame buffer
+   * device and a specific video mode by FBIOGET_FSCREENINFO ioctl. */
+  struct  fb_fix_screeninfo finfo;
+
+  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");
+
+  /* Get fixed screen information */
+  if ( ioctl ( fbfd ,  FBIOGET_FSCREENINFO , &finfo )  )
+  {
+    printf("Error reading fixed screen information.\n");
+    exit(2);
+  } else {
+    printf("Succesfully Read the Fixed Screen Information\n");
+  }
+
+  printf("fb_fix_screeninfo.smem_len = %d\n", finfo.smem_len);
+  printf("fb_fix_screeninfo.mmio_len = %d\n", finfo.mmio_len);
+}
+}}}