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	linux-dmabuf-v1: add helper for output layer feedback events
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					 2 changed files with 21 additions and 1 deletions
				
			
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					@ -116,6 +116,8 @@ struct wlr_linux_dmabuf_feedback_v1_init_options {
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	struct wlr_renderer *main_renderer;
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						struct wlr_renderer *main_renderer;
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	// Output on which direct scan-out is possible on the primary plane, or NULL
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						// Output on which direct scan-out is possible on the primary plane, or NULL
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	struct wlr_output *scanout_primary_output;
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						struct wlr_output *scanout_primary_output;
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						// Output layer feedback event, or NULL
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						const struct wlr_output_layer_feedback_event *output_layer_feedback_event;
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};
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					};
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/**
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					/**
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					@ -10,6 +10,7 @@
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#include <wlr/render/wlr_renderer.h>
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					#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_compositor.h>
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					#include <wlr/types/wlr_compositor.h>
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#include <wlr/types/wlr_linux_dmabuf_v1.h>
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					#include <wlr/types/wlr_linux_dmabuf_v1.h>
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					#include <wlr/types/wlr_output_layer.h>
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#include <wlr/util/log.h>
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					#include <wlr/util/log.h>
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#include <xf86drm.h>
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					#include <xf86drm.h>
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#include "linux-dmabuf-unstable-v1-protocol.h"
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					#include "linux-dmabuf-unstable-v1-protocol.h"
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					@ -1062,6 +1063,8 @@ static bool devid_from_fd(int fd, dev_t *devid) {
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bool wlr_linux_dmabuf_feedback_v1_init_with_options(struct wlr_linux_dmabuf_feedback_v1 *feedback,
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					bool wlr_linux_dmabuf_feedback_v1_init_with_options(struct wlr_linux_dmabuf_feedback_v1 *feedback,
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		const struct wlr_linux_dmabuf_feedback_v1_init_options *options) {
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							const struct wlr_linux_dmabuf_feedback_v1_init_options *options) {
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	assert(options->main_renderer != NULL);
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						assert(options->main_renderer != NULL);
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						assert(options->scanout_primary_output == NULL ||
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							options->output_layer_feedback_event == NULL);
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	memset(feedback, 0, sizeof(*feedback));
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						memset(feedback, 0, sizeof(*feedback));
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					@ -1084,7 +1087,22 @@ bool wlr_linux_dmabuf_feedback_v1_init_with_options(struct wlr_linux_dmabuf_feed
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		goto error;
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							goto error;
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	}
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						}
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	if (options->scanout_primary_output != NULL) {
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						if (options->output_layer_feedback_event != NULL) {
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							const struct wlr_output_layer_feedback_event *event = options->output_layer_feedback_event;
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							struct wlr_linux_dmabuf_feedback_v1_tranche *tranche =
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								wlr_linux_dmabuf_feedback_add_tranche(feedback);
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							if (tranche == NULL) {
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								goto error;
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							}
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							tranche->target_device = event->target_device;
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							tranche->flags = ZWP_LINUX_DMABUF_FEEDBACK_V1_TRANCHE_FLAGS_SCANOUT;
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							if (!wlr_drm_format_set_intersect(&tranche->formats, event->formats, renderer_formats)) {
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								wlr_log(WLR_ERROR, "Failed to intersect renderer and scanout formats");
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								goto error;
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							}
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						} else if (options->scanout_primary_output != NULL) {
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		int backend_drm_fd = wlr_backend_get_drm_fd(options->scanout_primary_output->backend);
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							int backend_drm_fd = wlr_backend_get_drm_fd(options->scanout_primary_output->backend);
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		if (backend_drm_fd < 0) {
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							if (backend_drm_fd < 0) {
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			wlr_log(WLR_ERROR, "Failed to get backend DRM FD");
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								wlr_log(WLR_ERROR, "Failed to get backend DRM FD");
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