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buffer: add data_ptr access flags

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This allows callers to specify the operations they'll perform on
the returned data pointer. The motivations for this are:

- The upcoming Linux MAP_NOSIGBUS flag may only be usable on
  read-only mappings.
- gbm_bo_map with GBM_BO_TRANSFER_READ hurts performance.
This commit is contained in:
Simon Ser 2021-06-29 17:08:32 +02:00 • committed by Simon Zeni
parent 105fdecd0c
commit 4e7a8707cc
7 changed files with 46 additions and 22 deletions
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3
render/gles2/texture.c
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@ -346,7 +346,8 @@ struct wlr_texture *gles2_texture_from_buffer(struct wlr_renderer *wlr_renderer,
struct wlr_dmabuf_attributes dmabuf;
if (wlr_buffer_get_dmabuf(buffer, &dmabuf)) {
return gles2_texture_from_dmabuf_buffer(renderer, buffer, &dmabuf);
} else if (buffer_begin_data_ptr_access(buffer, &data, &format, &stride)) {
} else if (buffer_begin_data_ptr_access(buffer,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
struct wlr_texture *tex = gles2_texture_from_pixels(wlr_renderer,
format, stride, buffer->width, buffer->height, data);
buffer_end_data_ptr_access(buffer);