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