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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <linux/fb.h>
#include <kms++util/kms++util.h>
using namespace kms;
int main(int argc, char** argv)
{
const char* fbdev = "/dev/fb0";
int r;
int fd = open(fbdev, O_RDWR);
FAIL_IF(fd < 0, "open %s failed\n", fbdev);
struct fb_var_screeninfo var;
r = ioctl(fd, FBIOGET_VSCREENINFO, &var);
FAIL_IF(r, "FBIOGET_VSCREENINFO failed");
struct fb_fix_screeninfo fix;
r = ioctl(fd, FBIOGET_FSCREENINFO, &fix);
FAIL_IF(r, "FBIOGET_FSCREENINFO failed");
uint8_t* ptr = (uint8_t*)mmap(NULL,
var.yres_virtual * fix.line_length,
PROT_WRITE | PROT_READ,
MAP_SHARED, fd, 0);
FAIL_IF(ptr == MAP_FAILED, "mmap failed");
ExtCPUFramebuffer buf(var.xres, var.yres_virtual, PixelFormat::XRGB8888, ptr, fix.line_length);
printf("%s: res %dx%d, virtual %dx%d, line_len %d\n",
fbdev,
var.xres, var.yres,
var.xres_virtual, var.yres_virtual,
fix.line_length);
draw_test_pattern(buf);
draw_text(buf, buf.width() / 2, 0, fbdev, RGB(255, 255, 255));
for (unsigned y = 0; y < var.yres_virtual; ++y)
memcpy(ptr + fix.line_length * y, buf.map(0) + buf.stride(0) * y, buf.stride(0));
close(fd);
return 0;
}
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