diff options
Diffstat (limited to 'drmtools-egl.c')
| -rw-r--r-- | drmtools-egl.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drmtools-egl.c b/drmtools-egl.c new file mode 100644 index 0000000..8c91c0f --- /dev/null +++ b/drmtools-egl.c @@ -0,0 +1,195 @@ +#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; + } + + dpy = eglGetDisplay(gbm_dev); + 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; + + /* 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; +} |