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backend/drm: strip alpha channel on scan-out
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parent
e516ea4c79
commit
5c78f1b0d5
1 changed files with 22 additions and 1 deletions
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@ -859,6 +859,15 @@ static bool drm_connector_schedule_frame(struct wlr_output *output) {
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return true;
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}
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static uint32_t strip_alpha_channel(uint32_t format) {
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switch (format) {
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case DRM_FORMAT_ARGB8888:
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return DRM_FORMAT_XRGB8888;
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default:
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return DRM_FORMAT_INVALID;
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}
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}
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static bool drm_connector_set_dmabuf(struct wlr_output *output,
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struct wlr_dmabuf_attributes *attribs) {
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struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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@ -875,9 +884,21 @@ static bool drm_connector_set_dmabuf(struct wlr_output *output,
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if (attribs->width != output->width || attribs->height != output->height) {
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return false;
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}
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struct wlr_dmabuf_attributes attribs_stripped_alpha;
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if (!wlr_drm_format_set_has(&crtc->primary->formats,
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attribs->format, attribs->modifier)) {
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return false;
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// The format isn't supported by the plane. Try stripping the alpha
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// channel, if any.
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uint32_t format = strip_alpha_channel(attribs->format);
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if (format != DRM_FORMAT_INVALID && wlr_drm_format_set_has(
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&crtc->primary->formats, format, attribs->modifier)) {
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attribs_stripped_alpha = *attribs;
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attribs_stripped_alpha.format = format;
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attribs = &attribs_stripped_alpha;
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} else {
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return false;
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}
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}
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struct gbm_bo *bo = import_gbm_bo(&drm->renderer, attribs);
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