Allocate and set mode in egl-compositor.
Pass the front buffer name to eglCreateSurfaceForName to create the
fullscreen EGLSurface.
diff --git a/egl-compositor.c b/egl-compositor.c
index 72681f1..0cf77f6 100644
--- a/egl-compositor.c
+++ b/egl-compositor.c
@@ -15,6 +15,7 @@
#include <png.h>
#include <math.h>
#include <linux/input.h>
+#include <xf86drmMode.h>
#include "wayland.h"
#include "cairo-util.h"
@@ -711,6 +712,98 @@
wl_display_add_object(display, obj);
}
+static uint32_t
+create_frontbuffer(int fd, int *width, int *height, int *stride)
+{
+ drmModeConnector *connector;
+ drmModeRes *resources;
+ drmModeEncoder *encoder;
+ struct drm_mode_modeinfo *mode;
+ struct drm_i915_gem_create create;
+ struct drm_i915_gem_pin pin;
+ struct drm_gem_flink flink;
+ unsigned int fb_id;
+ int i, ret;
+
+ 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;
+ }
+
+ pin.handle = create.handle;
+ pin.alignment = 4096;
+ if (ioctl(fd, DRM_IOCTL_I915_GEM_PIN, &pin)) {
+ fprintf(stderr, "failed to pin buffer: %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 const char gem_device[] = "/dev/dri/card0";
WL_EXPORT struct wl_compositor *
@@ -721,14 +814,15 @@
struct egl_compositor *ec;
const char *filename;
struct screenshooter *shooter;
+ uint32_t fb_name;
+ int stride;
+ const static EGLint attribs[] =
+ { EGL_RENDER_BUFFER, EGL_BACK_BUFFER, EGL_NONE };
ec = malloc(sizeof *ec);
if (ec == NULL)
return NULL;
- ec->width = 1280;
- ec->height = 800;
-
ec->base.interface = &interface;
ec->wl_display = display;
@@ -747,10 +841,12 @@
fprintf(stderr, "failed to get configs\n");
return NULL;
}
-
+
ec->config = configs[24];
- ec->surface = eglCreateSurfaceNative(ec->display, ec->config,
- 0, 0, ec->width, ec->height);
+ fb_name = create_frontbuffer(eglGetDisplayFD(ec->display),
+ &ec->width, &ec->height, &stride);
+ ec->surface = eglCreateSurfaceForName(ec->display, ec->config,
+ fb_name, ec->width, ec->height, stride, attribs);
if (ec->surface == NULL) {
fprintf(stderr, "failed to create surface\n");
return NULL;