initial checkin of fbutil.c and Makefile

diff --git a/Makefile b/Makefile
new file mode 100644 (file)
index 0000000..3a28e2b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+CFLAGS = -O3 -Wall
+LIBS =
+INCLUDES =
+CC = gcc
+OBJS = fbutil
+
+all: $(OBJS)
+
+clean:
+       rm -f $(OBJS)

diff --git a/fbutil.c b/fbutil.c
new file mode 100644 (file)
index 0000000..1edba2e
--- /dev/null
+++ b/fbutil.c
@@ -0,0 +1,157 @@
+/*
+ * fbutil.c -- get/set framebuffer values
+ *
+ * hackbard@hackdaworld.dyndns.org
+ *
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <linux/fb.h>
+
+#define MAXDEV 32
+#define DEVICE "/dev/fb/0"
+
+#define FIXED_INFO (1<<0)
+#define VAR_INFO (1<<1)
+
+int usage() {
+       printf("usage:\n");
+       printf("-d \t specify device (default %s)\n",DEVICE);
+       printf("-f \t print out fixed framebuffer info\n");
+       printf("-v \t print out variable framebuffer info\n");
+       printf("\n");
+       return 1;
+}
+
+int main(int argc,char **argv) {
+
+       int i;
+       int fd;
+       char device[MAXDEV];
+       unsigned char getmodes;
+       unsigned char setmodes;
+
+       /* fb variables */
+       struct fb_fix_screeninfo fixed_info;
+       struct fb_var_screeninfo var_info;
+
+       strcpy(device,DEVICE);
+       getmodes=0;
+       setmodes=0;
+
+       for(i=1;i<argc;i++) {
+               if(argv[i][0]=='-') {
+                       switch(argv[i][1]) {
+                               case 'd':
+                                       strncpy(device,argv[++i],MAXDEV-1);
+                                       break;
+                               case 'f':
+                                       getmodes|=FIXED_INFO;
+                                       break;
+                               case 'v':
+                                       getmodes|=VAR_INFO;
+                                       break;
+                               default:
+                                       usage();
+                                       return -1;
+                       }
+               }
+               else {
+                       usage();
+                       return -1;
+               }
+       }
+
+       if((fd=open(device,O_RDWR))<0) {
+               printf("unable to open %s\n",device);
+               return -1;
+       }
+
+       if(getmodes&FIXED_INFO) {
+               if(ioctl(fd,FBIOGET_FSCREENINFO,&fixed_info)<0) {
+                       printf("cannot get fixed screen info\n");
+                       return -1;
+               }
+               printf("fixed screen info:\n");
+               printf("id: %s\n",fixed_info.id);
+               printf("framebuffer memory: start=0x%x length=%u\n",
+                       fixed_info.smem_start,fixed_info.smem_len);
+               printf("type: ");
+               if(fixed_info.type==FB_TYPE_PACKED_PIXELS)
+                       printf("packed pixels\n");
+               if(fixed_info.type==FB_TYPE_PLANES)
+                       printf("non interleaved planes\n");
+               if(fixed_info.type==FB_TYPE_INTERLEAVED_PLANES)
+                       printf("interleaved planes\n");
+               if(fixed_info.type==FB_TYPE_TEXT)
+                       printf("text attributes\n");
+               if(fixed_info.type==FB_TYPE_VGA_PLANES)
+                       printf("ega/vga planes\n");
+               printf("visual: ");
+               if(fixed_info.visual==FB_VISUAL_MONO01)
+                       printf("monochrome 1=black, 0=white\n");
+               if(fixed_info.visual==FB_VISUAL_MONO10)
+                       printf("monochrome 1=white, 0=black\n");
+               if(fixed_info.visual==FB_VISUAL_TRUECOLOR)
+                       printf("true color\n");
+               if(fixed_info.visual==FB_VISUAL_PSEUDOCOLOR)
+                       printf("pseudo color\n");
+               if(fixed_info.visual==FB_VISUAL_DIRECTCOLOR)
+                       printf("direct color\n");
+               if(fixed_info.visual==FB_VISUAL_STATIC_PSEUDOCOLOR)
+                       printf("direct pseudo color\n");
+               printf("hardware panning x/y: %c/%c\n",
+                       fixed_info.xpanstep?'y':'n',
+                       fixed_info.ypanstep?'y':'n');
+               printf("hardware y wrap: %c\n",fixed_info.ywrapstep?'y':'n');
+               printf("line length: %u bytes\n",fixed_info.line_length);
+               printf("mapped memory: start=0x%0x length=%u\n",
+                       fixed_info.mmio_start,fixed_info.mmio_len);
+               printf("accel: %u (0 = no accel, > 0 see <linux/fb.h>)\n",
+                       fixed_info.accel);
+
+       }
+
+       if(getmodes&VAR_INFO) {
+               if(ioctl(fd,FBIOGET_VSCREENINFO,&var_info)<0) {
+                       printf("cannot get variable screen info\n");
+                       return -1;
+               }
+               printf("variable screen info:\n");
+               printf("resolution: %ux%u, virtual %ux%u\n",
+                       var_info.xres,var_info.yres,
+                       var_info.xres_virtual,var_info.yres_virtual);
+               printf("bits per pixel: %u\n",var_info.bits_per_pixel);
+               printf("offsets: x=%u y=%u\n",
+                       var_info.xoffset,var_info.yoffset);
+               printf("gray scale: %c\n",var_info.grayscale?'y':'n');
+               printf("rgb:\n");
+               printf("red: offset=%u length=%u msb=%c\n",
+                       var_info.red.offset,var_info.red.length,
+                       var_info.red.msb_right?'r':'l');
+               printf("green: offset=%u length=%u msb=%c\n",
+                       var_info.green.offset,var_info.green.length,
+                       var_info.green.msb_right?'r':'l');
+               printf("blue: offset=%u length=%u msb=%c\n",
+                       var_info.blue.offset,var_info.blue.length,
+                       var_info.blue.msb_right?'r':'l');
+               printf("transparency: offset=%u length=%u msb=%c\n",
+                       var_info.transp.offset,var_info.transp.length,
+                       var_info.transp.msb_right?'r':'l');
+               printf("non standard pixel format: %c\n",
+                       var_info.nonstd?'y':'n');
+               // printf("activate:
+       }
+
+       close(fd);
+
+       return 1;
+}
+