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screencast: add function to query supported modifiers for a format

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This function follows the structure of the equivalent function in egl
operating on basis of the announced format modifier pairs by wlroots.
This commit is contained in:
columbarius 2021-07-10 23:24:49 +02:00
parent 2ca2b7b603
commit 18efde6dde
2 changed files with 33 additions and 0 deletions
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2
include/screencast_common.h
View file

@ -177,6 +177,8 @@ struct gbm_device *xdpw_gbm_device_create(void);
struct xdpw_buffer *xdpw_buffer_create(struct xdpw_screencast_instance *cast,
enum buffer_type buffer_type, struct xdpw_screencopy_frame_info *frame_info);
void xdpw_buffer_destroy(struct xdpw_buffer *buffer);
bool wlr_query_dmabuf_modifiers(struct xdpw_screencast_context *ctx, uint32_t drm_format,
uint32_t num_modifiers, uint64_t *modifiers, uint32_t *max_modifiers);
enum wl_shm_format xdpw_format_wl_shm_from_drm_fourcc(uint32_t format);
uint32_t xdpw_format_drm_fourcc_from_wl_shm(enum wl_shm_format format);
enum spa_video_format xdpw_format_pw_from_drm_fourcc(uint32_t format);

31
src/screencast/screencast_common.c
View file

@ -219,6 +219,37 @@ void xdpw_buffer_destroy(struct xdpw_buffer *buffer) {
free(buffer);
}
bool wlr_query_dmabuf_modifiers(struct xdpw_screencast_context *ctx, uint32_t drm_format,
uint32_t num_modifiers, uint64_t *modifiers, uint32_t *max_modifiers) {
if (wl_list_empty(&ctx->format_modifier_pairs))
return false;
struct xdpw_format_modifier_pair *fm_pair;
if (num_modifiers == 0) {
*max_modifiers = 0;
wl_list_for_each(fm_pair, &ctx->format_modifier_pairs, link) {
if (fm_pair->fourcc == drm_format &&
(fm_pair->modifier == DRM_FORMAT_MOD_INVALID ||
gbm_device_get_format_modifier_plane_count(ctx->gbm, fm_pair->fourcc, fm_pair->modifier) > 0))
*max_modifiers += 1;
}
return true;
}
uint32_t i = 0;
wl_list_for_each(fm_pair, &ctx->format_modifier_pairs, link) {
if (i == num_modifiers)
break;
if (fm_pair->fourcc == drm_format &&
(fm_pair->modifier == DRM_FORMAT_MOD_INVALID ||
gbm_device_get_format_modifier_plane_count(ctx->gbm, fm_pair->fourcc, fm_pair->modifier) > 0)) {
modifiers[i] = fm_pair->modifier;
i++;
}
}
*max_modifiers = num_modifiers;
return true;
}
enum wl_shm_format xdpw_format_wl_shm_from_drm_fourcc(uint32_t format) {
switch (format) {
case DRM_FORMAT_ARGB8888: