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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <inttypes.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <gbm.h>
#include <epoxy/gl.h>
#include <epoxy/egl.h>
#include "gfx.h"
#include "drmtools.h"
/* ------------------------------------------------------------------ */
static struct gbm_device *gbm_dev;
static struct gbm_surface *gbm_surface;
static EGLDisplay dpy;
static EGLConfig cfg;
static EGLContext ctx;
static EGLSurface surface;
/* ------------------------------------------------------------------ */
static int drm_setup_egl(void)
{
static const EGLint conf_att[] = {
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 5,
EGL_GREEN_SIZE, 5,
EGL_BLUE_SIZE, 5,
EGL_ALPHA_SIZE, 0,
EGL_NONE,
};
static const EGLint ctx_att[] = {
EGL_NONE
};
EGLint major, minor;
EGLBoolean b;
EGLint n;
gbm_dev = gbm_create_device(drm_fd);
if (!gbm_dev) {
fprintf(stderr, "egl: gbm_create_device failed\n");
return -1;
}
gbm_surface = gbm_surface_create(gbm_dev,
drm_mode->hdisplay,
drm_mode->vdisplay,
GBM_FORMAT_XRGB8888,
GBM_BO_USE_RENDERING);
if (!gbm_surface) {
fprintf(stderr, "egl: gbm_create_surface failed\n");
return -1;
}
#ifdef EGL_MESA_platform_gbm
dpy = eglGetPlatformDisplayEXT(EGL_PLATFORM_GBM_MESA, gbm_dev, NULL);
#else
dpy = eglGetDisplay(gbm_dev);
#endif
if (dpy == EGL_NO_DISPLAY) {
fprintf(stderr, "egl: eglGetDisplay failed\n");
return -1;
}
b = eglInitialize(dpy, &major, &minor);
if (b == EGL_FALSE) {
fprintf(stderr, "egl: eglInitialize failed\n");
return -1;
}
b = eglBindAPI(EGL_OPENGL_API);
if (b == EGL_FALSE) {
fprintf(stderr, "egl: eglBindAPI failed\n");
return -1;
}
b = eglChooseConfig(dpy, conf_att, &cfg, 1, &n);
if (b == EGL_FALSE || n != 1) {
fprintf(stderr, "egl: eglChooseConfig failed\n");
return -1;
}
ctx = eglCreateContext(dpy, cfg, EGL_NO_CONTEXT, ctx_att);
if (ctx == EGL_NO_CONTEXT) {
fprintf(stderr, "egl: eglCreateContext failed\n");
return -1;
}
b = eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, ctx);
if (b == EGL_FALSE) {
fprintf(stderr, "egl: eglMakeCurrent(EGL_NO_SURFACE) failed\n");
return -1;
}
surface = eglCreateWindowSurface(dpy, cfg,
(EGLNativeWindowType)gbm_surface,
NULL);
if (!surface) {
fprintf(stderr, "egl: eglCreateWindowSurface failed\n");
return -1;
}
b = eglMakeCurrent(dpy, surface, surface, ctx);
if (b == EGL_FALSE) {
fprintf(stderr, "egl: eglMakeCurrent(surface) failed\n");
return -1;
}
return 0;
}
static void drm_egl_restore_display(void)
{
/* FIXME */
}
static int fbid;
static struct gbm_bo *bo;
/* called after cairo_gl_surface_swapbuffers(); */
static void drm_egl_flush_display(bool second)
{
uint32_t handle, stride, newfb;
struct gbm_bo *newbo;
int rc;
newbo = gbm_surface_lock_front_buffer(gbm_surface);
if (!newbo) {
fprintf(stderr, "egl: gbm_surface_lock_front_buffer failed\n");
return;
}
handle = gbm_bo_get_handle(newbo).u32;
stride = gbm_bo_get_stride(newbo);
drmModeAddFB(drm_fd, drm_mode->hdisplay, drm_mode->vdisplay, 24, 32,
stride, handle, &newfb);
rc = drmModeSetCrtc(drm_fd, drm_enc->crtc_id, newfb, 0, 0,
&drm_conn->connector_id, 1,
&drm_conn->modes[0]);
if (rc < 0) {
fprintf(stderr, "egl: drmModeSetCrtc() failed\n");
return;
}
if (fbid) {
drmModeRmFB(drm_fd, fbid);
}
fbid = newfb;
if (bo) {
gbm_surface_release_buffer(gbm_surface, bo);
}
bo = newbo;
}
gfxstate *drm_init_egl(const char *device, const char *output)
{
gfxstate *gfx;
char dev[64];
if (device) {
snprintf(dev, sizeof(dev), "%s", device);
} else {
snprintf(dev, sizeof(dev), DRM_DEV_NAME, DRM_DIR_NAME, 0);
}
fprintf(stderr, "trying drm/egl: %s ...\n", dev);
if (drm_init_dev(dev, output) < 0)
return NULL;
if (drm_setup_egl() < 0)
return NULL;
fprintf(stderr, "%s: %s\n",
glGetString(GL_VENDOR), glGetString(GL_RENDERER));
/* prepare gfx */
gfx = malloc(sizeof(*gfx));
memset(gfx, 0, sizeof(*gfx));
gfx->hdisplay = drm_mode->hdisplay;
gfx->vdisplay = drm_mode->vdisplay;
gfx->dpy = dpy;
gfx->ctx = ctx;
gfx->surface = surface;
gfx->restore_display = drm_egl_restore_display;
gfx->cleanup_display = drm_cleanup_display;
gfx->flush_display = drm_egl_flush_display;
return gfx;
}
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