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Add 16f option to render_bit_depth command

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This change adds an option to let sway render onto XBGR16161616F
buffers, assuming hardware and drivers support this. Such half-float
formats may be used in the future for applications (including nested
Sway) to submit high-dynamic-range buffers.

Using this option is even more likely to reveal bugs in graphics
drivers, monitors, and screenshot tools than 'render_bit_depth 10'.
This commit is contained in:
Manuel Stoeckl 2022-07-20 20:11:37 -04:00
parent 6b97c4fa71
commit 1351c4e505
4 changed files with 13 additions and 3 deletions
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1
include/sway/config.h
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@ -258,6 +258,7 @@ enum render_bit_depth {
RENDER_BIT_DEPTH_DEFAULT, // the default is currently 8 RENDER_BIT_DEPTH_DEFAULT, // the default is currently 8
RENDER_BIT_DEPTH_8, RENDER_BIT_DEPTH_8,
RENDER_BIT_DEPTH_10, RENDER_BIT_DEPTH_10,
RENDER_BIT_DEPTH_16F,
}; };
/** /**

5
sway/commands/output/render_bit_depth.c
View file

@ -17,9 +17,12 @@ struct cmd_results *output_cmd_render_bit_depth(int argc, char **argv) {
} else if (strcmp(*argv, "10") == 0) { } else if (strcmp(*argv, "10") == 0) {
config->handler_context.output_config->render_bit_depth = config->handler_context.output_config->render_bit_depth =
RENDER_BIT_DEPTH_10; RENDER_BIT_DEPTH_10;
} else if (strcmp(*argv, "16f") == 0 || strcmp(*argv, "16F") == 0) {
config->handler_context.output_config->render_bit_depth =
RENDER_BIT_DEPTH_16F;
} else { } else {
return cmd_results_new(CMD_INVALID, return cmd_results_new(CMD_INVALID,
"Invalid bit depth. Must be a value in (8|10)."); "Invalid bit depth. Must be a value in (8|10|16f).");
} }
config->handler_context.leftovers.argc = argc - 1; config->handler_context.leftovers.argc = argc - 1;

5
sway/config/output.c
View file

@ -376,6 +376,11 @@ static const uint32_t *bit_depth_preferences[] = {
DRM_FORMAT_XRGB8888, DRM_FORMAT_XRGB8888,
DRM_FORMAT_INVALID, DRM_FORMAT_INVALID,
}, },
[RENDER_BIT_DEPTH_16F] = (const uint32_t []){
DRM_FORMAT_XBGR16161616F,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_INVALID,
},
}; };
static void queue_output_config(struct output_config *oc, static void queue_output_config(struct output_config *oc,

5
sway/sway-output.5.scd
View file

@ -165,9 +165,10 @@ must be separated by one space. For example:
adaptive sync can improve latency, but can cause flickering on some adaptive sync can improve latency, but can cause flickering on some
hardware. hardware.
*output* <name> render_bit_depth 8|10 *output* <name> render_bit_depth 8|10|16f
Controls the color channel bit depth at which frames are rendered; the Controls the color channel bit depth at which frames are rendered; the
default is currently 8 bits per channel. default is currently 8 bits per channel. The "16f" option requests
color channels encoded in half-precision floating point format.
Setting higher values will not have an effect if hardware and software lack Setting higher values will not have an effect if hardware and software lack
support for such bit depths. Successfully increasing the render bit depth support for such bit depths. Successfully increasing the render bit depth