output: Add function to set preferred render format

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

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)
/**

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@ -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.
*

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@ -1,10 +1,13 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <backend/backend.h>
#include <drm_fourcc.h>
#include <stdlib.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/util/log.h>
#include "render/allocator/allocator.h"
#include "render/swapchain.h"
#include "types/wlr_output.h"
#include "util/global.h"
@ -296,6 +299,16 @@ void wlr_output_enable_adaptive_sync(struct wlr_output *output, bool enabled) {
output->pending.adaptive_sync_enabled = enabled;
}
void wlr_output_set_render_format(struct wlr_output *output, uint32_t format) {
if (output->render_format == format) {
output->pending.committed &= ~WLR_OUTPUT_STATE_RENDER_FORMAT;
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_RENDER_FORMAT;
output->pending.render_format = format;
}
void wlr_output_set_subpixel(struct wlr_output *output,
enum wl_output_subpixel subpixel) {
if (output->subpixel == subpixel) {
@ -343,6 +356,7 @@ void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
output->impl = impl;
output->display = display;
wl_list_init(&output->modes);
output->render_format = DRM_FORMAT_XRGB8888;
output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
output->scale = 1;
output->commit_seq = 0;
@ -542,6 +556,30 @@ static bool output_basic_test(struct wlr_output *output) {
}
}
if (output->pending.committed & WLR_OUTPUT_STATE_RENDER_FORMAT) {
struct wlr_allocator *allocator = output->allocator;
assert(allocator != NULL);
const struct wlr_drm_format_set *display_formats = NULL;
if (output->impl->get_primary_formats) {
display_formats =
output->impl->get_primary_formats(output, allocator->buffer_caps);
if (display_formats == NULL) {
wlr_log(WLR_ERROR, "Failed to get primary display formats");
return false;
}
}
struct wlr_drm_format *format = output_pick_format(output, display_formats,
output->pending.render_format);
if (format == NULL) {
wlr_log(WLR_ERROR, "Failed to pick primary buffer format for output");
return false;
}
free(format);
}
bool enabled = output->enabled;
if (output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
enabled = output->pending.enabled;
@ -569,6 +607,10 @@ static bool output_basic_test(struct wlr_output *output) {
wlr_log(WLR_DEBUG, "Tried to enable adaptive sync on a disabled output");
return false;
}
if (!enabled && output->pending.committed & WLR_OUTPUT_STATE_RENDER_FORMAT) {
wlr_log(WLR_DEBUG, "Tried to set format for a disabled output");
return false;
}
if (!enabled && output->pending.committed & WLR_OUTPUT_STATE_GAMMA_LUT) {
wlr_log(WLR_DEBUG, "Tried to set the gamma lut on a disabled output");
return false;
@ -642,6 +684,10 @@ bool wlr_output_commit(struct wlr_output *output) {
}
}
if (output->pending.committed & WLR_OUTPUT_STATE_RENDER_FORMAT) {
output->render_format = output->pending.render_format;
}
output->commit_seq++;
bool scale_updated = output->pending.committed & WLR_OUTPUT_STATE_SCALE;

View File

@ -9,6 +9,7 @@
#include "render/drm_format_set.h"
#include "render/swapchain.h"
#include "render/wlr_renderer.h"
#include "render/pixel_format.h"
#include "types/wlr_output.h"
bool wlr_output_init_render(struct wlr_output *output,
@ -47,12 +48,6 @@ static bool output_create_swapchain(struct wlr_output *output,
int width, height;
output_pending_resolution(output, &width, &height);
if (output->swapchain != NULL && output->swapchain->width == width &&
output->swapchain->height == height &&
(allow_modifiers || output->swapchain->format->len == 0)) {
return true;
}
struct wlr_allocator *allocator = output->allocator;
assert(allocator != NULL);
@ -67,12 +62,22 @@ static bool output_create_swapchain(struct wlr_output *output,
}
struct wlr_drm_format *format = output_pick_format(output, display_formats,
DRM_FORMAT_XRGB8888);
output->render_format);
if (format == NULL) {
wlr_log(WLR_ERROR, "Failed to pick primary buffer format for output '%s'",
output->name);
return false;
}
if (output->swapchain != NULL && output->swapchain->width == width &&
output->swapchain->height == height &&
output->swapchain->format->format == format->format &&
(allow_modifiers || output->swapchain->format->len == 0)) {
// no change, keep existing swapchain
free(format);
return true;
}
wlr_log(WLR_DEBUG, "Choosing primary buffer format 0x%"PRIX32" for output '%s'",
format->format, output->name);
@ -171,6 +176,9 @@ bool output_ensure_buffer(struct wlr_output *output) {
if (output->pending.committed & WLR_OUTPUT_STATE_MODE) {
needs_new_buffer = true;
}
if (output->pending.committed & WLR_OUTPUT_STATE_RENDER_FORMAT) {
needs_new_buffer = true;
}
if (!needs_new_buffer ||
(output->pending.committed & WLR_OUTPUT_STATE_BUFFER)) {
return true;