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output: Add function to set preferred render format

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This change introduces new double buffered state to the wlr_output,
corresponding to the buffer format to render to.

The format being rendered to does not control the bit depth of colors
being sent to the display; it does generally determine the format with
which screenshot data is provided. The DRM backend _may_ sent higher
bit depths if the render format depth is increased, but hardware and
other limitations may apply.
This commit is contained in:
Manuel Stoeckl 2021-11-10 23:20:10 -05:00 • committed by Simon Ser
parent 3d7d6ec06f
commit e879d566bb
4 changed files with 81 additions and 7 deletions
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1
include/wlr/interfaces/wlr_output.h
View file

@ -21,6 +21,7 @@
(WLR_OUTPUT_STATE_DAMAGE | \
WLR_OUTPUT_STATE_SCALE | \
WLR_OUTPUT_STATE_TRANSFORM | \
WLR_OUTPUT_STATE_RENDER_FORMAT | \
WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED)
/**

19
include/wlr/types/wlr_output.h
View file

@ -61,6 +61,7 @@ enum wlr_output_state_field {
WLR_OUTPUT_STATE_TRANSFORM = 1 << 5,
WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED = 1 << 6,
WLR_OUTPUT_STATE_GAMMA_LUT = 1 << 7,
WLR_OUTPUT_STATE_RENDER_FORMAT = 1 << 8,
};
enum wlr_output_state_mode_type {
@ -78,6 +79,7 @@ struct wlr_output_state {
float scale;
enum wl_output_transform transform;
bool adaptive_sync_enabled;
uint32_t render_format;
// only valid if WLR_OUTPUT_STATE_BUFFER
struct wlr_buffer *buffer;
@ -134,6 +136,7 @@ struct wlr_output {
enum wl_output_subpixel subpixel;
enum wl_output_transform transform;
enum wlr_output_adaptive_sync_status adaptive_sync_status;
uint32_t render_format;
bool needs_frame;
// damage for cursors and fullscreen surface, in output-local coordinates
@ -308,6 +311,22 @@ void wlr_output_set_transform(struct wlr_output *output,
* Adaptive sync is double-buffered state, see `wlr_output_commit`.
*/
void wlr_output_enable_adaptive_sync(struct wlr_output *output, bool enabled);
/**
* Set the output buffer render format. Default value: DRM_FORMAT_XRGB8888
*
* While high bit depth render formats are necessary for a monitor to receive
* useful high bit data, they do not guarantee it; a DRM_FORMAT_XBGR2101010
* buffer will only lead to sending 10-bpc image data to the monitor if
* hardware and software permit this.
*
* This only affects the format of the output buffer used when rendering,
* as with `wlr_output_attach_render`. It has no impact on the cursor buffer
* format, or on the formats supported for direct scan-out (see also
* `wlr_output_attach_buffer`).
*
* This format is double-buffered state, see `wlr_output_commit`.
*/
void wlr_output_set_render_format(struct wlr_output *output, uint32_t format);
/**
* Sets a scale for the output.
*