600 lines
17 KiB
C
600 lines
17 KiB
C
/*
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* Test the GLFBDev interface. Only tested with radeonfb driver!!!!
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*
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* Written by Brian Paul
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*/
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#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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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 <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <linux/fb.h>
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#include <linux/kd.h>
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#include <linux/vt.h>
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#include <GL/gl.h>
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#include <GL/glfbdev.h>
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#include <math.h>
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/**
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* Choose one of these modes
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*/
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/*static const int XRes = 1280, YRes = 1024, Hz = 75;*/
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/*static const int XRes = 1280, YRes = 1024, Hz = 70;*/
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/*static const int XRes = 1280, YRes = 1024, Hz = 60;*/
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static const int XRes = 1024, YRes = 768, Hz = 70;
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static int DesiredDepth = 32;
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static int NumFrames = 100;
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static struct fb_fix_screeninfo FixedInfo;
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static struct fb_var_screeninfo VarInfo, OrigVarInfo;
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static int OriginalVT = -1;
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static int ConsoleFD = -1;
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static int FrameBufferFD = -1;
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static caddr_t FrameBuffer = (caddr_t) -1;
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static caddr_t MMIOAddress = (caddr_t) -1;
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static void
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print_fixed_info(const struct fb_fix_screeninfo *fixed, const char *s)
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{
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static const char *visuals[] = {
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"MONO01", "MONO10", "TRUECOLOR", "PSEUDOCOLOR",
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"DIRECTCOLOR", "STATIC_PSEUDOCOLOR"
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};
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printf("%s info -----------------------\n", s);
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printf("id = %16s\n", fixed->id);
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printf("smem_start = 0x%lx\n", fixed->smem_start);
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printf("smem_len = %d (0x%x)\n", fixed->smem_len, fixed->smem_len);
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printf("type = 0x%x\n", fixed->type);
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printf("type_aux = 0x%x\n", fixed->type_aux);
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printf("visual = 0x%x (%s)\n", fixed->visual, visuals[fixed->visual]);
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printf("xpanstep = %d\n", fixed->xpanstep);
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printf("ypanstep = %d\n", fixed->ypanstep);
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printf("ywrapstep = %d\n", fixed->ywrapstep);
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printf("line_length = %d\n", fixed->line_length);
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printf("mmio_start = 0x%lx\n", fixed->mmio_start);
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printf("mmio_len = %d (0x%x)\n", fixed->mmio_len, fixed->mmio_len);
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printf("accel = 0x%x\n", fixed->accel);
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}
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static void
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print_var_info(const struct fb_var_screeninfo *var, const char *s)
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{
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printf("%s info -----------------------\n", s);
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printf("xres = %d\n", var->xres);
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printf("yres = %d\n", var->yres);
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printf("xres_virtual = %d\n", var->xres_virtual);
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printf("yres_virtual = %d\n", var->yres_virtual);
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printf("xoffset = %d\n", var->xoffset);
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printf("yoffset = %d\n", var->yoffset);
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printf("bits_per_pixel = %d\n", var->bits_per_pixel);
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printf("grayscale = %d\n", var->grayscale);
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printf("red.offset = %d length = %d msb_right = %d\n",
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var->red.offset, var->red.length, var->red.msb_right);
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printf("green.offset = %d length = %d msb_right = %d\n",
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var->green.offset, var->green.length, var->green.msb_right);
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printf("blue.offset = %d length = %d msb_right = %d\n",
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var->blue.offset, var->blue.length, var->blue.msb_right);
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printf("transp.offset = %d length = %d msb_right = %d\n",
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var->transp.offset, var->transp.length, var->transp.msb_right);
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printf("nonstd = %d\n", var->nonstd);
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printf("activate = %d\n", var->activate);
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printf("height = %d mm\n", var->height);
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printf("width = %d mm\n", var->width);
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printf("accel_flags = 0x%x\n", var->accel_flags);
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printf("pixclock = %d\n", var->pixclock);
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printf("left_margin = %d\n", var->left_margin);
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printf("right_margin = %d\n", var->right_margin);
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printf("upper_margin = %d\n", var->upper_margin);
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printf("lower_margin = %d\n", var->lower_margin);
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printf("hsync_len = %d\n", var->hsync_len);
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printf("vsync_len = %d\n", var->vsync_len);
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printf("sync = %d\n", var->sync);
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printf("vmode = %d\n", var->vmode);
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}
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static void
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signal_handler(int signumber)
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{
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signal(signumber, SIG_IGN); /* prevent recursion! */
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fprintf(stderr, "error: got signal %d (exiting)\n", signumber);
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exit(1);
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}
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static void
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initialize_fbdev( void )
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{
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char ttystr[1000];
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int fd, vtnumber, ttyfd;
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int sz;
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(void) sz;
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if (geteuid()) {
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fprintf(stderr, "error: you need to be root\n");
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exit(1);
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}
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#if 1
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/* open the framebuffer device */
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FrameBufferFD = open("/dev/fb0", O_RDWR);
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if (FrameBufferFD < 0) {
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fprintf(stderr, "Error opening /dev/fb0: %s\n", strerror(errno));
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exit(1);
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}
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#endif
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/* open /dev/tty0 and get the vt number */
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if ((fd = open("/dev/tty0", O_WRONLY, 0)) < 0) {
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fprintf(stderr, "error opening /dev/tty0\n");
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exit(1);
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}
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if (ioctl(fd, VT_OPENQRY, &vtnumber) < 0 || vtnumber < 0) {
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fprintf(stderr, "error: couldn't get a free vt\n");
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exit(1);
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}
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close(fd);
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/* open the console tty */
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sprintf(ttystr, "/dev/tty%d", vtnumber); /* /dev/tty1-64 */
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ConsoleFD = open(ttystr, O_RDWR | O_NDELAY, 0);
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if (ConsoleFD < 0) {
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fprintf(stderr, "error couldn't open console fd\n");
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exit(1);
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}
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/* save current vt number */
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{
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struct vt_stat vts;
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if (ioctl(ConsoleFD, VT_GETSTATE, &vts) == 0)
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OriginalVT = vts.v_active;
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}
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/* disconnect from controlling tty */
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ttyfd = open("/dev/tty", O_RDWR);
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if (ttyfd >= 0) {
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ioctl(ttyfd, TIOCNOTTY, 0);
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close(ttyfd);
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}
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/* some magic to restore the vt when we exit */
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{
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struct vt_mode vt;
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if (ioctl(ConsoleFD, VT_ACTIVATE, vtnumber) != 0)
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printf("ioctl VT_ACTIVATE: %s\n", strerror(errno));
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if (ioctl(ConsoleFD, VT_WAITACTIVE, vtnumber) != 0)
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printf("ioctl VT_WAITACTIVE: %s\n", strerror(errno));
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if (ioctl(ConsoleFD, VT_GETMODE, &vt) < 0) {
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fprintf(stderr, "error: ioctl VT_GETMODE: %s\n", strerror(errno));
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exit(1);
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}
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vt.mode = VT_PROCESS;
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vt.relsig = SIGUSR1;
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vt.acqsig = SIGUSR1;
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if (ioctl(ConsoleFD, VT_SETMODE, &vt) < 0) {
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fprintf(stderr, "error: ioctl(VT_SETMODE) failed: %s\n",
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strerror(errno));
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exit(1);
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}
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}
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/* go into graphics mode */
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if (ioctl(ConsoleFD, KDSETMODE, KD_GRAPHICS) < 0) {
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fprintf(stderr, "error: ioctl(KDSETMODE, KD_GRAPHICS) failed: %s\n",
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strerror(errno));
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exit(1);
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}
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#if 0
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/* open the framebuffer device */
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FrameBufferFD = open("/dev/fb0", O_RDWR);
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if (FrameBufferFD < 0) {
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fprintf(stderr, "Error opening /dev/fb0: %s\n", strerror(errno));
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exit(1);
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}
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#endif
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/* Get the fixed screen info */
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if (ioctl(FrameBufferFD, FBIOGET_FSCREENINFO, &FixedInfo)) {
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fprintf(stderr, "error: ioctl(FBIOGET_FSCREENINFO) failed: %s\n",
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strerror(errno));
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exit(1);
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}
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print_fixed_info(&FixedInfo, "Fixed");
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/* get the variable screen info */
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if (ioctl(FrameBufferFD, FBIOGET_VSCREENINFO, &OrigVarInfo)) {
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fprintf(stderr, "error: ioctl(FBIOGET_VSCREENINFO) failed: %s\n",
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strerror(errno));
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exit(1);
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}
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print_var_info(&OrigVarInfo, "Orig Var");
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/* operate on a copy */
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VarInfo = OrigVarInfo;
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/* set the depth, resolution, etc */
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if (DesiredDepth)
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VarInfo.bits_per_pixel = DesiredDepth;
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if (VarInfo.bits_per_pixel == 16) {
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VarInfo.red.offset = 11;
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VarInfo.green.offset = 5;
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VarInfo.blue.offset = 0;
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VarInfo.red.length = 5;
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VarInfo.green.length = 6;
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VarInfo.blue.length = 5;
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VarInfo.transp.offset = 0;
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VarInfo.transp.length = 0;
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}
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else if (VarInfo.bits_per_pixel == 32) {
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VarInfo.red.offset = 16;
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VarInfo.green.offset = 8;
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VarInfo.blue.offset = 0;
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VarInfo.transp.offset = 24;
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VarInfo.red.length = 8;
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VarInfo.green.length = 8;
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VarInfo.blue.length = 8;
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VarInfo.transp.length = 8;
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}
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/* timing values taken from /etc/fb.modes */
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if (XRes == 1280 && YRes == 1024) {
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VarInfo.xres_virtual = VarInfo.xres = XRes;
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VarInfo.yres_virtual = VarInfo.yres = YRes;
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if (Hz == 75) {
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VarInfo.pixclock = 7408;
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VarInfo.left_margin = 248;
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VarInfo.right_margin = 16;
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VarInfo.upper_margin = 38;
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VarInfo.lower_margin = 1;
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VarInfo.hsync_len = 144;
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VarInfo.vsync_len = 3;
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}
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else if (Hz == 70) {
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VarInfo.pixclock = 7937;
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VarInfo.left_margin = 216;
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VarInfo.right_margin = 80;
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VarInfo.upper_margin = 36;
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VarInfo.lower_margin = 1;
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VarInfo.hsync_len = 112;
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VarInfo.vsync_len = 5;
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}
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else if (Hz == 60) {
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VarInfo.pixclock = 9260;
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VarInfo.left_margin = 248;
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VarInfo.right_margin = 48;
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VarInfo.upper_margin = 38;
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VarInfo.lower_margin = 1;
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VarInfo.hsync_len = 112;
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VarInfo.vsync_len = 3;
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}
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else {
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fprintf(stderr, "invalid rate for 1280x1024\n");
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exit(1);
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}
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}
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else if (XRes == 1024 && YRes == 768 && Hz == 70) {
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VarInfo.xres_virtual = VarInfo.xres = XRes;
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VarInfo.yres_virtual = VarInfo.yres = YRes;
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if (Hz == 70) {
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VarInfo.pixclock = 13334;
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VarInfo.left_margin = 144;
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VarInfo.right_margin = 24;
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VarInfo.upper_margin = 29;
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VarInfo.lower_margin = 3;
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VarInfo.hsync_len = 136;
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VarInfo.vsync_len = 6;
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}
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else {
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fprintf(stderr, "invalid rate for 1024x768\n");
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exit(1);
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}
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}
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VarInfo.xoffset = 0;
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VarInfo.yoffset = 0;
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VarInfo.nonstd = 0;
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VarInfo.vmode &= ~FB_VMODE_YWRAP; /* turn off scrolling */
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/* set new variable screen info */
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if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &VarInfo)) {
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fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
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strerror(errno));
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exit(1);
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}
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print_var_info(&VarInfo, "New Var");
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if (FixedInfo.visual != FB_VISUAL_TRUECOLOR &&
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FixedInfo.visual != FB_VISUAL_DIRECTCOLOR) {
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fprintf(stderr, "non-TRUE/DIRECT-COLOR visuals (0x%x) not supported by this demo.\n", FixedInfo.visual);
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exit(1);
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}
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/* initialize colormap */
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if (FixedInfo.visual == FB_VISUAL_DIRECTCOLOR) {
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struct fb_cmap cmap;
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unsigned short red[256], green[256], blue[256];
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int i;
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/* we're assuming 256 entries here */
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printf("initializing directcolor colormap\n");
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cmap.start = 0;
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cmap.len = 256;
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cmap.red = red;
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cmap.green = green;
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cmap.blue = blue;
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cmap.transp = NULL;
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for (i = 0; i < cmap.len; i++) {
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red[i] = green[i] = blue[i] = (i << 8) | i;
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}
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if (ioctl(FrameBufferFD, FBIOPUTCMAP, (void *) &cmap) < 0) {
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fprintf(stderr, "ioctl(FBIOPUTCMAP) failed [%d]\n", i);
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}
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}
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/*
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* fbdev says the frame buffer is at offset zero, and the mmio region
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* is immediately after.
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*/
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/* mmap the framebuffer into our address space */
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FrameBuffer = (caddr_t) mmap(0, /* start */
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FixedInfo.smem_len, /* bytes */
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PROT_READ | PROT_WRITE, /* prot */
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MAP_SHARED, /* flags */
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FrameBufferFD, /* fd */
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0 /* offset */);
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if (FrameBuffer == (caddr_t) - 1) {
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fprintf(stderr, "error: unable to mmap framebuffer: %s\n",
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strerror(errno));
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exit(1);
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}
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printf("FrameBuffer = %p\n", FrameBuffer);
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#if 1
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/* mmap the MMIO region into our address space */
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MMIOAddress = (caddr_t) mmap(0, /* start */
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FixedInfo.mmio_len, /* bytes */
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PROT_READ | PROT_WRITE, /* prot */
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MAP_SHARED, /* flags */
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FrameBufferFD, /* fd */
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FixedInfo.smem_len /* offset */);
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if (MMIOAddress == (caddr_t) - 1) {
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fprintf(stderr, "error: unable to mmap mmio region: %s\n",
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strerror(errno));
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}
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printf("MMIOAddress = %p\n", MMIOAddress);
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/* try out some simple MMIO register reads */
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if (0)
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{
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typedef unsigned int CARD32;
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typedef unsigned char CARD8;
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#define RADEON_CONFIG_MEMSIZE 0x00f8
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#define RADEON_MEM_SDRAM_MODE_REG 0x0158
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#define MMIO_IN32(base, offset) \
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*(volatile CARD32 *)(void *)(((CARD8*)(base)) + (offset))
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#define INREG(addr) MMIO_IN32(MMIOAddress, addr)
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int sz, type;
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const char *typeStr[] = {"SDR", "DDR", "64-bit SDR"};
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sz = INREG(RADEON_CONFIG_MEMSIZE);
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type = INREG(RADEON_MEM_SDRAM_MODE_REG);
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printf("RADEON_CONFIG_MEMSIZE = %d (%d MB)\n", sz, sz / 1024 / 1024);
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printf("RADEON_MEM_SDRAM_MODE_REG >> 30 = %d (%s)\n",
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type >> 30, typeStr[type>>30]);
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}
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#endif
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}
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static void
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shutdown_fbdev( void )
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{
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struct vt_mode VT;
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printf("cleaning up...\n");
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/* restore original variable screen info */
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if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &OrigVarInfo)) {
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fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
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strerror(errno));
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exit(1);
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}
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munmap(MMIOAddress, FixedInfo.mmio_len);
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munmap(FrameBuffer, FixedInfo.smem_len);
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close(FrameBufferFD);
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/* restore text mode */
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ioctl(ConsoleFD, KDSETMODE, KD_TEXT);
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/* set vt */
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if (ioctl(ConsoleFD, VT_GETMODE, &VT) != -1) {
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VT.mode = VT_AUTO;
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ioctl(ConsoleFD, VT_SETMODE, &VT);
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}
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/* restore original vt */
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if (OriginalVT >= 0) {
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ioctl(ConsoleFD, VT_ACTIVATE, OriginalVT);
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OriginalVT = -1;
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}
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close(ConsoleFD);
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}
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/* Borrowed from GLUT */
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static void
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doughnut(GLfloat r, GLfloat R, GLint nsides, GLint rings)
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{
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int i, j;
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GLfloat theta, phi, theta1;
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GLfloat cosTheta, sinTheta;
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GLfloat cosTheta1, sinTheta1;
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GLfloat ringDelta, sideDelta;
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ringDelta = 2.0 * M_PI / rings;
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sideDelta = 2.0 * M_PI / nsides;
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theta = 0.0;
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cosTheta = 1.0;
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sinTheta = 0.0;
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for (i = rings - 1; i >= 0; i--) {
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theta1 = theta + ringDelta;
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cosTheta1 = cos(theta1);
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sinTheta1 = sin(theta1);
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glBegin(GL_QUAD_STRIP);
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phi = 0.0;
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for (j = nsides; j >= 0; j--) {
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GLfloat cosPhi, sinPhi, dist;
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phi += sideDelta;
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cosPhi = cos(phi);
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sinPhi = sin(phi);
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dist = R + r * cosPhi;
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glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
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glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
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glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
|
|
glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
|
|
}
|
|
glEnd();
|
|
theta = theta1;
|
|
cosTheta = cosTheta1;
|
|
sinTheta = sinTheta1;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gltest( void )
|
|
{
|
|
static const int attribs[] = {
|
|
GLFBDEV_DOUBLE_BUFFER,
|
|
GLFBDEV_DEPTH_SIZE, 16,
|
|
GLFBDEV_NONE
|
|
};
|
|
GLFBDevContextPtr ctx;
|
|
GLFBDevBufferPtr buf;
|
|
GLFBDevVisualPtr vis;
|
|
int bytes, r, g, b, a;
|
|
float ang;
|
|
int i;
|
|
|
|
printf("GLFBDEV_VENDOR = %s\n", glFBDevGetString(GLFBDEV_VENDOR));
|
|
printf("GLFBDEV_VERSION = %s\n", glFBDevGetString(GLFBDEV_VERSION));
|
|
|
|
/* framebuffer size */
|
|
bytes = VarInfo.xres_virtual * VarInfo.yres_virtual * VarInfo.bits_per_pixel / 8;
|
|
|
|
vis = glFBDevCreateVisual( &FixedInfo, &VarInfo, attribs );
|
|
assert(vis);
|
|
|
|
buf = glFBDevCreateBuffer( &FixedInfo, &VarInfo, vis, FrameBuffer, NULL, bytes );
|
|
assert(buf);
|
|
|
|
ctx = glFBDevCreateContext( vis, NULL );
|
|
assert(buf);
|
|
|
|
b = glFBDevMakeCurrent( ctx, buf, buf );
|
|
assert(b);
|
|
|
|
/*printf("GL_EXTENSIONS: %s\n", glGetString(GL_EXTENSIONS));*/
|
|
glGetIntegerv(GL_RED_BITS, &r);
|
|
glGetIntegerv(GL_GREEN_BITS, &g);
|
|
glGetIntegerv(GL_BLUE_BITS, &b);
|
|
glGetIntegerv(GL_ALPHA_BITS, &a);
|
|
printf("RED_BITS=%d GREEN_BITS=%d BLUE_BITS=%d ALPHA_BITS=%d\n",
|
|
r, g, b, a);
|
|
|
|
glClearColor(0.5, 0.5, 1.0, 0);
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glFrustum(-1, 1, -1, 1, 2, 30);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
glTranslatef(0, 0, -15);
|
|
glViewport(0, 0, VarInfo.xres_virtual, VarInfo.yres_virtual);
|
|
glEnable(GL_LIGHTING);
|
|
glEnable(GL_LIGHT0);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
printf("Drawing %d frames...\n", NumFrames);
|
|
|
|
ang = 0.0;
|
|
for (i = 0; i < NumFrames; i++) {
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
glPushMatrix();
|
|
glRotatef(ang, 1, 0, 0);
|
|
doughnut(1, 3, 40, 20);
|
|
glPopMatrix();
|
|
glFBDevSwapBuffers(buf);
|
|
ang += 15.0;
|
|
}
|
|
|
|
/* clean up */
|
|
b = glFBDevMakeCurrent( NULL, NULL, NULL);
|
|
assert(b);
|
|
|
|
glFBDevDestroyContext(ctx);
|
|
glFBDevDestroyBuffer(buf);
|
|
glFBDevDestroyVisual(vis);
|
|
}
|
|
|
|
|
|
static void
|
|
parse_args(int argc, char *argv[])
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
if (strcmp(argv[i], "-f") == 0) {
|
|
NumFrames = atoi(argv[i+1]);
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
main( int argc, char *argv[] )
|
|
{
|
|
signal(SIGUSR1, signal_handler); /* exit if someone tries a vt switch */
|
|
signal(SIGSEGV, signal_handler); /* catch segfaults */
|
|
|
|
parse_args(argc, argv);
|
|
|
|
printf("Setting mode to %d x %d @ %d Hz, %d bpp\n", XRes, YRes, Hz, DesiredDepth);
|
|
initialize_fbdev();
|
|
gltest();
|
|
shutdown_fbdev();
|
|
|
|
return 0;
|
|
}
|