void* generate_package(uint8 pdu_type, uint32 content_len, uint16 seq) {
uint32 data_len = TOTAL_HEADER_LEN + content_len;
void* buf = malloc(data_len);
CHECK(buf != NULL);
memset(buf, 0, data_len);
fill_link_header((uint8*)buf, pdu_type, content_len, seq);
if(pdu_type == PDU_DATA) {
fill_content(buf, content_len);
}
return buf;
}
static int
create_dmabuf_buffer(struct display *display, struct buffer *buffer,
int width, int height)
{
struct zwp_linux_buffer_params_v1 *params;
uint64_t modifier;
uint32_t flags;
if (!drm_connect(buffer)) {
fprintf(stderr, "drm_connect failed\n");
goto error;
}
buffer->width = width;
buffer->height = height;
buffer->bpp = 32; /* hardcoded XRGB8888 format */
if (!alloc_bo(buffer)) {
fprintf(stderr, "alloc_bo failed\n");
goto error1;
}
if (!map_bo(buffer)) {
fprintf(stderr, "map_bo failed\n");
goto error2;
}
fill_content(buffer);
unmap_bo(buffer);
if (drm_intel_bo_gem_export_to_prime(buffer->bo, &buffer->dmabuf_fd) != 0) {
fprintf(stderr, "drm_intel_bo_gem_export_to_prime failed\n");
goto error2;
}
if (buffer->dmabuf_fd < 0) {
fprintf(stderr, "error: dmabuf_fd < 0\n");
goto error2;
}
/* We now have a dmabuf! It should contain 2x2 tiles (i.e. each tile
* is 256x256) of misc colours, and be mappable, either as ARGB8888, or
* XRGB8888. */
modifier = 0;
flags = 0;
params = zwp_linux_dmabuf_v1_create_params(display->dmabuf);
zwp_linux_buffer_params_v1_add(params,
buffer->dmabuf_fd,
0, /* plane_idx */
0, /* offset */
buffer->stride,
modifier >> 32,
modifier & 0xffffffff);
zwp_linux_buffer_params_v1_add_listener(params, ¶ms_listener, buffer);
zwp_linux_buffer_params_v1_create(params,
buffer->width,
buffer->height,
DRM_FORMAT_XRGB8888,
flags);
return 0;
error2:
free_bo(buffer);
error1:
drm_shutdown(buffer);
error:
return -1;
}
