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breezy-desktop
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Offload values that don't change per-fragment from the fragment shader

This commit is contained in:
wheaney 2024-07-03 13:59:00 -07:00
parent 5192815098
commit 8bf7824243
2 changed files with 41 additions and 9 deletions
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48
gnome/src/xrEffect.js
View File

@ -56,15 +56,18 @@ const shaderUniformLocations = {
'trim_height_percent': null,
'display_size': null,
'display_north_offset': null,
'lens_distance_ratio': null,
'lens_vector': null,
'lens_vector_r': null, // only used if sbs_enabled is true
'texcoord_x_limits': null, // index 0: min; index 1: max
'texcoord_x_limits_r': null, // only used if sbs_enabled is true
'sbs_enabled': null,
'sbs_content': null,
'sbs_mode_stretched': null,
'custom_banner_enabled': null,
'half_fov_z_rads': null,
'half_fov_y_rads': null,
'source_resolution': null,
'fov_half_widths': null,
'fov_widths': null,
'display_resolution': null,
'source_to_display_ratio': null,
'curved_display': null
};
@ -122,15 +125,41 @@ function setIntermittentUniformVariables() {
const imuResetState = validKeepalive && imuData[0] === 0.0 && imuData[1] === 0.0 && imuData[2] === 0.0 && imuData[3] === 1.0;
const enabled = dataViewUint8(dataView, ENABLED) !== 0 && version === DATA_LAYOUT_VERSION && validKeepalive;
const displayRes = dataViewUint32Array(dataView, DISPLAY_RES);
const sbsEnabled = dataViewUint8(dataView, SBS_ENABLED) !== 0;
if (enabled) {
const displayFov = dataViewFloat(dataView, DISPLAY_FOV);
// TODO - drive these values from settings
const sbsContent = false;
const sbsModeStretched = true;
// compute these values once, they only change when the XR device changes
const displayAspectRatio = displayRes[0] / displayRes[1];
const diagToVertRatio = Math.sqrt(Math.pow(displayAspectRatio, 2) + 1);
const halfFovZRads = degreeToRadian(displayFov / diagToVertRatio) / 2;
const halfFovYRads = halfFovZRads * displayAspectRatio;
const fovHalfWidths = [Math.tan(halfFovYRads), Math.tan(halfFovZRads)];
const fovWidths = [fovHalfWidths[0] * 2, fovHalfWidths[1] * 2];
let texcoordXLimits = [0.0, 1.0];
let texcoordXLimitsRight = [0.0, 1.0];
if (sbsEnabled) {
if (sbsContent) {
texcoordXLimits[1] = 0.5;
texcoordXLimitsRight[0] = 0.5;
if (!sbsModeStretched) {
texcoordXLimits[0] = 0.25;
texcoordXLimitsRight[1] = 0.75;
}
} else if (!sbsModeStretched) {
texcoordXLimits[0] = 0.25;
texcoordXLimits[1] = 0.75;
}
}
const lensDistanceRatio = dataViewFloat(dataView, LENS_DISTANCE_RATIO);
const lensFromCenter = lensDistanceRatio / 3.0;
const lensVector = [lensDistanceRatio, lensFromCenter, 0.0];
const lensVectorRight = [lensDistanceRatio, -lensFromCenter, 0.0];
// our overlay doesn't quite cover the full screen texture, which allows us to see some of the real desktop
// underneath, so we trim three pixels around the entire edge of the texture
@ -146,26 +175,29 @@ function setIntermittentUniformVariables() {
setSingleFloat(this, 'trim_height_percent', trimHeightPercent);
setSingleFloat(this, 'half_fov_z_rads', halfFovZRads);
setSingleFloat(this, 'half_fov_y_rads', halfFovYRads);
this.set_uniform_float(shaderUniformLocations['fov_half_widths'], 2, fovHalfWidths);
this.set_uniform_float(shaderUniformLocations['fov_widths'], 2, fovWidths);
setSingleFloat(this, 'curved_display', this.curved_display ? 1.0 : 0.0);
this.set_uniform_float(shaderUniformLocations['texcoord_x_limits'], 2, texcoordXLimits);
this.set_uniform_float(shaderUniformLocations['texcoord_x_limits_r'], 2, texcoordXLimitsRight);
this.set_uniform_float(shaderUniformLocations['lens_vector'], 3, lensVector);
this.set_uniform_float(shaderUniformLocations['lens_vector_r'], 3, lensVectorRight);
}
// update the supported device detected property if the state changes, trigger "notify::" events
if (this.supported_device_detected !== validKeepalive) this.supported_device_detected = validKeepalive;
// update the widescreen property if the state changes while still enabled, trigger "notify::" events
const sbsEnabled = dataViewUint8(dataView, SBS_ENABLED) !== 0;
if (enabled && this.widescreen_mode_state !== sbsEnabled) this.widescreen_mode_state = sbsEnabled;
// these variables are always in play, even if enabled is false
setSingleFloat(this, 'enabled', enabled ? 1.0 : 0.0);
setSingleFloat(this, 'show_banner', imuResetState ? 1.0 : 0.0);
setSingleFloat(this, 'sbs_content', 0.0); // TODO - drive from settings
setSingleFloat(this, 'sbs_mode_stretched', 1.0); // content always fills the whole display
setSingleFloat(this, 'sbs_enabled', sbsEnabled ? 1.0 : 0.0);
setSingleFloat(this, 'custom_banner_enabled', dataViewUint8(dataView, CUSTOM_BANNER_ENABLED) !== 0 ? 1.0 : 0.0);
this.set_uniform_float(shaderUniformLocations['display_resolution'], 2, displayRes);
this.set_uniform_float(shaderUniformLocations['source_resolution'], 2, [this.target_monitor.width, this.target_monitor.height]);
this.set_uniform_float(shaderUniformLocations['source_to_display_ratio'], 2, [this.target_monitor.width/displayRes[0], this.target_monitor.height/displayRes[1]]);
} else if (dataView.byteLength !== 0) {
throw new Error(`Invalid dataView.byteLength: ${dataView.byteLength} !== ${DATA_VIEW_LENGTH}`);
}

2
modules/sombrero

@ -1 +1 @@
Subproject commit d2001ab938e0493c80d95131cba4ec1e2d7e1f02
Subproject commit ec3f82aa4834847adf1f0c640eba4b87b6f3ff65