types/buffer/buffer.c


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#include "render/pixel_format.h"
#include "types/wlr_buffer.h"

bool buffer_is_opaque(struct wlr_buffer *buffer) {
  void *data;
  uint32_t format;
  size_t stride;
  struct wlr_dmabuf_attributes dmabuf;
  struct wlr_shm_attributes shm;
  if (wlr_buffer_get_dmabuf(buffer, &dmabuf)) {
    format = dmabuf.format;
  } else if (wlr_buffer_get_shm(buffer, &shm)) {
    format = shm.format;
  } else if (wlr_buffer_begin_data_ptr_access(buffer,
                                              WLR_BUFFER_DATA_PTR_ACCESS_READ,
                                              &data, &format, &stride)) {
    wlr_buffer_end_data_ptr_access(buffer);
  } else {
    return false;
  }

  const struct wlr_pixel_format_info *format_info =
      drm_get_pixel_format_info(format);
  if (format_info == NULL) {
    return false;
  }

  return !format_info->has_alpha;
}