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backend/drm: strip alpha channel on scan-out

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This commit is contained in:
Simon Ser 2019-04-22 09:08:10 +03:00 committed by Drew DeVault
parent e516ea4c79
commit 5c78f1b0d5
1 changed files with 22 additions and 1 deletions
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23
backend/drm/drm.c
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@ -859,6 +859,15 @@ static bool drm_connector_schedule_frame(struct wlr_output *output) {
return true;
}
static uint32_t strip_alpha_channel(uint32_t format) {
switch (format) {
case DRM_FORMAT_ARGB8888:
return DRM_FORMAT_XRGB8888;
default:
return DRM_FORMAT_INVALID;
}
}
static bool drm_connector_set_dmabuf(struct wlr_output *output,
struct wlr_dmabuf_attributes *attribs) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
@ -875,9 +884,21 @@ static bool drm_connector_set_dmabuf(struct wlr_output *output,
if (attribs->width != output->width || attribs->height != output->height) {
return false;
}
struct wlr_dmabuf_attributes attribs_stripped_alpha;
if (!wlr_drm_format_set_has(&crtc->primary->formats,
attribs->format, attribs->modifier)) {
return false;
// The format isn't supported by the plane. Try stripping the alpha
// channel, if any.
uint32_t format = strip_alpha_channel(attribs->format);
if (format != DRM_FORMAT_INVALID && wlr_drm_format_set_has(
&crtc->primary->formats, format, attribs->modifier)) {
attribs_stripped_alpha = *attribs;
attribs_stripped_alpha.format = format;
attribs = &attribs_stripped_alpha;
} else {
return false;
}
}
struct gbm_bo *bo = import_gbm_bo(&drm->renderer, attribs);