static cairo_surface_t *
display_create_shm_surface(struct display *display,
struct rectangle *rectangle)
{
struct shm_surface_data *data;
cairo_surface_t *surface;
struct wl_visual *visual;
int stride, fd;
char filename[] = "/tmp/wayland-shm-XXXXXX";
data = malloc(sizeof *data);
if (data == NULL)
return NULL;
stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32,
rectangle->width);
data->length = stride * rectangle->height;
fd = mkstemp(filename);
if (fd < 0) {
fprintf(stderr, "open %s failed: %m", filename);
return NULL;
}
if (ftruncate(fd, data->length) < 0) {
fprintf(stderr, "ftruncate failed: %m");
close(fd);
return NULL;
}
data->map = mmap(NULL, data->length,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
unlink(filename);
if (data->map == MAP_FAILED) {
fprintf(stderr, "mmap failed: %m");
close(fd);
return NULL;
}
surface = cairo_image_surface_create_for_data (data->map,
CAIRO_FORMAT_ARGB32,
rectangle->width,
rectangle->height,
stride);
cairo_surface_set_user_data (surface, &surface_data_key,
data, shm_surface_data_destroy);
visual = wl_display_get_premultiplied_argb_visual(display->display);
data->data.buffer = wl_shm_create_buffer(display->shm,
fd,
rectangle->width,
rectangle->height,
stride, visual);
close(fd);
return surface;
}
static cairo_surface_t *
display_create_drm_surface(struct display *display,
struct rectangle *rectangle)
{
struct drm_surface_data *data;
EGLDisplay dpy = display->dpy;
cairo_surface_t *surface;
struct wl_visual *visual;
EGLint name, stride;
EGLint image_attribs[] = {
EGL_WIDTH, 0,
EGL_HEIGHT, 0,
EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_SCANOUT_MESA,
EGL_NONE
};
data = malloc(sizeof *data);
if (data == NULL)
return NULL;
data->display = display;
image_attribs[1] = rectangle->width;
image_attribs[3] = rectangle->height;
data->image = eglCreateDRMImageMESA(dpy, image_attribs);
cairo_device_acquire(display->device);
glGenTextures(1, &data->texture);
glBindTexture(GL_TEXTURE_2D, data->texture);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, data->image);
cairo_device_release(display->device);
eglExportDRMImageMESA(display->dpy, data->image, &name, NULL, &stride);
visual = wl_display_get_premultiplied_argb_visual(display->display);
data->data.buffer =
wl_drm_create_buffer(display->drm, name, rectangle->width,
rectangle->height, stride, visual);
surface = cairo_gl_surface_create_for_texture(display->device,
CAIRO_CONTENT_COLOR_ALPHA,
data->texture,
rectangle->width,
rectangle->height);
cairo_surface_set_user_data (surface, &surface_data_key,
data, drm_surface_data_destroy);
return surface;
}
static struct wl_visual *
get_visual (struct wl_display *display, CoglPixelFormat format)
{
switch (format)
{
case VISUAL_ARGB_PRE:
return wl_display_get_premultiplied_argb_visual (display);
case VISUAL_ARGB:
return wl_display_get_argb_visual (display);
case VISUAL_RGB:
return wl_display_get_rgb_visual (display);
default:
return NULL;
}
}
