buffer: add wlr_dmabuf_buffer
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18adb43a44
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08e5b909f9
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@ -53,6 +53,25 @@ struct wlr_readonly_data_buffer *readonly_data_buffer_create(uint32_t format,
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*/
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bool readonly_data_buffer_drop(struct wlr_readonly_data_buffer *buffer);
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struct wlr_dmabuf_buffer {
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struct wlr_buffer base;
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struct wlr_dmabuf_attributes dmabuf;
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bool saved;
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};
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/**
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* Wraps a DMA-BUF into a wlr_buffer. The DMA-BUF may be accessed until
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* dmabuf_buffer_drop() is called.
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*/
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struct wlr_dmabuf_buffer *dmabuf_buffer_create(
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struct wlr_dmabuf_attributes *dmabuf);
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/**
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* Drops ownership of the buffer (see wlr_buffer_drop() for more details) and
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* takes a reference to the DMA-BUF (by dup'ing its file descriptors) if a
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* consumer still has the buffer locked.
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*/
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bool dmabuf_buffer_drop(struct wlr_dmabuf_buffer *buffer);
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/**
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* Buffer capabilities.
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*
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@ -528,3 +528,67 @@ bool readonly_data_buffer_drop(struct wlr_readonly_data_buffer *buffer) {
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wlr_buffer_drop(&buffer->base);
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return ok;
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}
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static const struct wlr_buffer_impl dmabuf_buffer_impl;
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static struct wlr_dmabuf_buffer *dmabuf_buffer_from_buffer(
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struct wlr_buffer *buffer) {
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assert(buffer->impl == &dmabuf_buffer_impl);
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return (struct wlr_dmabuf_buffer *)buffer;
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}
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static void dmabuf_buffer_destroy(struct wlr_buffer *wlr_buffer) {
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struct wlr_dmabuf_buffer *buffer = dmabuf_buffer_from_buffer(wlr_buffer);
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if (buffer->saved) {
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wlr_dmabuf_attributes_finish(&buffer->dmabuf);
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}
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free(buffer);
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}
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static bool dmabuf_buffer_get_dmabuf(struct wlr_buffer *wlr_buffer,
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struct wlr_dmabuf_attributes *dmabuf) {
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struct wlr_dmabuf_buffer *buffer = dmabuf_buffer_from_buffer(wlr_buffer);
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if (buffer->dmabuf.n_planes == 0) {
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return false;
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}
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*dmabuf = buffer->dmabuf;
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return true;
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}
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static const struct wlr_buffer_impl dmabuf_buffer_impl = {
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.destroy = dmabuf_buffer_destroy,
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.get_dmabuf = dmabuf_buffer_get_dmabuf,
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};
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struct wlr_dmabuf_buffer *dmabuf_buffer_create(
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struct wlr_dmabuf_attributes *dmabuf) {
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struct wlr_dmabuf_buffer *buffer = calloc(1, sizeof(*buffer));
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if (buffer == NULL) {
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return NULL;
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}
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wlr_buffer_init(&buffer->base, &dmabuf_buffer_impl,
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dmabuf->width, dmabuf->height);
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buffer->dmabuf = *dmabuf;
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return buffer;
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}
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bool dmabuf_buffer_drop(struct wlr_dmabuf_buffer *buffer) {
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bool ok = true;
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if (buffer->base.n_locks > 0) {
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struct wlr_dmabuf_attributes saved_dmabuf = {0};
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if (!wlr_dmabuf_attributes_copy(&saved_dmabuf, &buffer->dmabuf)) {
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wlr_log(WLR_ERROR, "Failed to save DMA-BUF");
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ok = false;
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memset(&buffer->dmabuf, 0, sizeof(buffer->dmabuf));
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} else {
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buffer->dmabuf = saved_dmabuf;
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buffer->saved = true;
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}
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}
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wlr_buffer_drop(&buffer->base);
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return ok;
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}
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