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#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <GL/gl.h>
#include "eagle.h"
#include <sys/time.h>
#include <drm_mode.h>
#include <xf86drmMode.h>
#include <sys/ioctl.h>
#include <i915_drm.h>
#include "setup.h"
#define ARRAY_SIZE(a) (sizeof (a) / sizeof (a)[0])
void die(const char *msg)
{
fprintf(stderr, "%s", msg);
exit(EXIT_FAILURE);
}
static void run(struct state *state, render_func_t render)
{
state->context = eglCreateContext(state->display, state->config, NULL, NULL);
if (state->context == NULL)
die("failed to create context\n");
if (!eglMakeCurrent(state->display, state->surface, state->surface, state->context))
die("failed to make context current\n");
render(state);
eglTerminate(state->display);
}
static const EGLint config_attribs[] = {
EGL_DEPTH_SIZE, 24,
EGL_CONFIG_CAVEAT, EGL_NONE,
EGL_NONE
};
static void run_dri2(int x, int y, int width, int height, render_func_t render)
{
EGLint major, minor;
Display *x11_display;
Window root, window;
XSetWindowAttributes attributes;
XSizeHints sizehints;
int screen;
unsigned long mask;
struct state state;
static const char name[] = "eglgears";
x11_display = XOpenDisplay(NULL);
if (x11_display == NULL)
return;
screen = DefaultScreen(x11_display);
root = RootWindow(x11_display, screen);
state.width = width;
state.height = height;
state.display = eglCreateDisplayX11(x11_display, root);
if (state.display == NULL)
die("failed to create display\n");
attributes.event_mask =
StructureNotifyMask | ExposureMask | KeyPressMask;
mask = CWEventMask;
window = XCreateWindow(x11_display, root, x, y, width, height,
0, DefaultDepth(x11_display, screen),
InputOutput,
DefaultVisual(x11_display, screen),
mask, &attributes);
sizehints.x = x;
sizehints.y = y;
sizehints.width = width;
sizehints.height = height;
sizehints.flags = USSize | USPosition;
XSetNormalHints(x11_display, window, &sizehints);
XSetStandardProperties(x11_display, window, name, name,
None, (char **)NULL, 0, &sizehints);
XMapWindow(x11_display, window);
if (!eglInitialize(state.display, &major, &minor))
die("failed to initialize display\n");
if (!eglChooseConfig(state.display, config_attribs, &state.config, 1, NULL))
die("failed to pick a config\n");
state.surface = eglCreateSurfaceX11(state.display, state.config, window, width, height);
if (state.surface == NULL)
die("failed to create surface\n");
run(&state, render);
}
static uint32_t
create_frontbuffer(EGLDisplay display, int *width, int *height, int *stride)
{
drmModeConnector *connector;
drmModeRes *resources;
drmModeEncoder *encoder;
drmModeModeInfo *mode;
struct drm_i915_gem_create create;
struct drm_gem_flink flink;
unsigned int fb_id;
int i, ret, fd;
fd = eglGetDisplayFD(display);
resources = drmModeGetResources(fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return 0;
}
for (i = 0; i < resources->count_connectors; i++) {
connector = drmModeGetConnector(fd, resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
connector->count_modes > 0)
break;
drmModeFreeConnector(connector);
}
if (i == resources->count_connectors) {
fprintf(stderr, "No currently active connector found.\n");
return -1;
}
mode = &connector->modes[0];
for (i = 0; i < resources->count_encoders; i++) {
encoder = drmModeGetEncoder(fd, resources->encoders[i]);
if (encoder == NULL)
continue;
if (encoder->encoder_id == connector->encoder_id)
break;
drmModeFreeEncoder(encoder);
}
/* Mode size at 32 bpp */
create.size = mode->hdisplay * mode->vdisplay * 4;
if (ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create) != 0) {
fprintf(stderr, "gem create failed: %m\n");
return 0;
}
ret = drmModeAddFB(fd, mode->hdisplay, mode->vdisplay,
32, 32, mode->hdisplay * 4, create.handle, &fb_id);
if (ret) {
fprintf(stderr, "failed to add fb: %m\n");
return 0;
}
ret = drmModeSetCrtc(fd, encoder->crtc_id, fb_id, 0, 0,
&connector->connector_id, 1, mode);
if (ret) {
fprintf(stderr, "failed to set mode: %m\n");
return 0;
}
flink.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink) != 0) {
fprintf(stderr, "gem flink failed: %m\n");
return 0;
}
*width = mode->hdisplay;
*height = mode->vdisplay;
*stride = mode->hdisplay * 4;
return flink.name;
}
static void run_native(int x, int y, int width, int height, render_func_t render)
{
EGLint major, minor;
uint32_t name;
int fb_width, fb_height, fb_stride;
struct udev *udev;
struct udev_device *device;
struct state state;
const static EGLint attribs[] =
{ EGL_RENDER_BUFFER, EGL_BACK_BUFFER, EGL_NONE };
udev = udev_new();
device = udev_device_new_from_syspath(udev, "/sys/class/drm/card0");
state.width = width;
state.height = height;
state.display = eglCreateDisplayNative(device);
if (state.display == NULL)
die("failed to create display\n");
if (!eglInitialize(state.display, &major, &minor))
die("failed to initialize display\n");
if (!eglChooseConfig(state.display, config_attribs, &state.config, 1, NULL))
die("failed to pick a config\n");
name = create_frontbuffer(state.display, &fb_width, &fb_height, &fb_stride);
state.surface = eglCreateSurfaceForName(state.display, state.config,
name, width, height,
fb_stride, attribs);
if (state.surface == NULL)
die("failed to create surface\n");
run(&state, render);
}
int setup(int argc, char *argv[], render_func_t render)
{
const int x = 100, y = 100, width = 300, height = 300;
run_dri2(x, y, width, height, render);
fprintf(stderr, "open x11 display failed, trying drmfb\n");
run_native(x, y, width, height, render);
return 0;
}
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