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fbflut
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follow line_length instead of assuming the line length is the width 

if you dont, some monitors go streeeeech lol
This commit is contained in:
xfnw 2021-08-19 13:26:17 -04:00
parent a0cbc30959
commit e2713e00e0
1 changed files with 6 additions and 3 deletions
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9
fbflut.c
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@ -11,7 +11,7 @@
#include <linux/fb.h>
#include <unistd.h>
int fbfd, fb_width, fb_height, fb_bytes;
int fbfd, fb_width, fb_height, fb_length, fb_bytes;
uint32_t *fbdata;
char *safestrtok(char *str, const char *delim) {
@ -45,11 +45,11 @@ void *handle_connection(void *socket_desc) {
if (xpos >= 0 && ypos >= 0 && xpos <= fb_width && ypos <= fb_height) {
if (color == 0) {
message = calloc(sizeof(char), 36);
asprintf(&message, "PX %i %i %X\n",xpos,ypos,fbdata[ypos*fb_width+xpos]);
asprintf(&message, "PX %i %i %X\n",xpos,ypos,fbdata[ypos*fb_length+xpos]);
write(sock, message, strlen(message));
continue;
} else {
fbdata[ypos*fb_width+xpos] = color;
fbdata[ypos*fb_length+xpos] = color;
}
}
continue;
@ -85,12 +85,15 @@ int main(int argc, char *argv[]) {
if (fbfd >= 0) {
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo);
ioctl(fbfd, FBIOGET_FSCREENINFO, &finfo);
fb_width = vinfo.xres;
fb_height = vinfo.yres;
fb_bytes = vinfo.bits_per_pixel / 8;
fb_length = finfo.line_length / fb_bytes;
printf("width: %i, height: %i, bpp: %i\n", fb_width, fb_height, fb_bytes);