158 lines
6.7 KiB
C++
158 lines
6.7 KiB
C++
/**************************************************************************/
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/* xr_vrs.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "xr_vrs.h"
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#include "servers/rendering/renderer_scene_render.h"
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#include "servers/rendering_server.h"
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void XRVRS::_bind_methods() {
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ClassDB::bind_method(D_METHOD("get_vrs_min_radius"), &XRVRS::get_vrs_min_radius);
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ClassDB::bind_method(D_METHOD("set_vrs_min_radius", "radius"), &XRVRS::set_vrs_min_radius);
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ClassDB::bind_method(D_METHOD("get_vrs_strength"), &XRVRS::get_vrs_strength);
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ClassDB::bind_method(D_METHOD("set_vrs_strength", "strength"), &XRVRS::set_vrs_strength);
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "vrs_min_radius", PROPERTY_HINT_RANGE, "1.0,100.0,1.0"), "set_vrs_min_radius", "get_vrs_min_radius");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "vrs_strength", PROPERTY_HINT_RANGE, "0.1,10.0,0.1"), "set_vrs_strength", "get_vrs_strength");
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ClassDB::bind_method(D_METHOD("make_vrs_texture", "target_size", "eye_foci"), &XRVRS::make_vrs_texture);
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}
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XRVRS::~XRVRS() {
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if (vrs_texture.is_valid()) {
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ERR_FAIL_NULL(RS::get_singleton());
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RS::get_singleton()->free(vrs_texture);
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vrs_texture = RID();
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}
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}
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float XRVRS::get_vrs_min_radius() const {
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return vrs_min_radius;
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}
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void XRVRS::set_vrs_min_radius(float p_vrs_min_radius) {
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if (p_vrs_min_radius < 1.0) {
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WARN_PRINT_ONCE("VRS minimum radius can not be set below 1.0");
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vrs_min_radius = 1.0;
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} else if (p_vrs_min_radius > 100.0) {
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WARN_PRINT_ONCE("VRS minimum radius can not be set above 100.0");
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vrs_min_radius = 100.0;
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} else {
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vrs_min_radius = p_vrs_min_radius;
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vrs_dirty = true;
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}
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}
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float XRVRS::get_vrs_strength() const {
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return vrs_strength;
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}
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void XRVRS::set_vrs_strength(float p_vrs_strength) {
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if (p_vrs_strength < 0.1) {
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WARN_PRINT_ONCE("VRS strength can not be set below 0.1");
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vrs_strength = 0.1;
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} else if (p_vrs_strength > 10.0) {
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WARN_PRINT_ONCE("VRS strength can not be set above 10.0");
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vrs_strength = 10.0;
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} else {
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vrs_strength = p_vrs_strength;
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vrs_dirty = true;
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}
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}
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RID XRVRS::make_vrs_texture(const Size2 &p_target_size, const PackedVector2Array &p_eye_foci) {
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ERR_FAIL_COND_V(p_eye_foci.is_empty(), RID());
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int32_t texel_width = RD::get_singleton()->limit_get(RD::LIMIT_VRS_TEXEL_WIDTH);
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int32_t texel_height = RD::get_singleton()->limit_get(RD::LIMIT_VRS_TEXEL_HEIGHT);
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// Should return sensible data or graphics API does not support VRS.
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ERR_FAIL_COND_V(texel_width < 1 || texel_height < 1, RID());
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Size2 vrs_size = Size2(0.5 + p_target_size.x / texel_width, 0.5 + p_target_size.y / texel_height).round();
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// Make sure we have at least one pixel.
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vrs_size = vrs_size.maxf(1.0);
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float max_radius = 0.5 * MIN(vrs_size.x, vrs_size.y); // Maximum radius that fits inside of our image
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float min_radius = vrs_min_radius * max_radius / 100.0; // Minimum radius as a percentage of our size
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real_t outer_radius = MAX(1.0, (max_radius - min_radius) / vrs_strength);
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Size2 vrs_sizei = vrs_size;
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// Our density map is now unified, with a value of (0.0, 0.0) meaning a 1x1 texel size and (1.0, 1.0) an max texel size.
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// For our standard VRS extension on Vulkan this means a maximum of 8x8.
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// For the density map extension this scales depending on the max texel size.
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if (target_size != vrs_sizei || eye_foci != p_eye_foci || vrs_dirty) {
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// Out with the old.
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if (vrs_texture.is_valid()) {
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RS::get_singleton()->free(vrs_texture);
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vrs_texture = RID();
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}
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// In with the new.
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Vector<Ref<Image>> images;
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target_size = vrs_sizei;
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eye_foci = p_eye_foci;
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for (int i = 0; i < eye_foci.size() && i < RendererSceneRender::MAX_RENDER_VIEWS; i++) {
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PackedByteArray data;
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data.resize(vrs_sizei.x * vrs_sizei.y * 2);
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uint8_t *data_ptr = data.ptrw();
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Vector2i view_center;
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view_center.x = int(vrs_size.x * (eye_foci[i].x + 1.0) * 0.5);
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view_center.y = int(vrs_size.y * (eye_foci[i].y + 1.0) * 0.5);
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int d = 0;
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for (int y = 0; y < vrs_sizei.y; y++) {
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for (int x = 0; x < vrs_sizei.x; x++) {
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Vector2 offset = Vector2(x - view_center.x, y - view_center.y);
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real_t density = 255.0 * MAX(0.0, (Math::abs(offset.x) - min_radius) / outer_radius);
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data_ptr[d++] = MIN(255, density);
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density = 255.0 * MAX(0.0, (Math::abs(offset.y) - min_radius) / outer_radius);
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data_ptr[d++] = MIN(255, density);
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}
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}
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images.push_back(Image::create_from_data(vrs_sizei.x, vrs_sizei.y, false, Image::FORMAT_RG8, data));
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}
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if (images.size() == 1) {
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vrs_texture = RS::get_singleton()->texture_2d_create(images[0]);
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} else {
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vrs_texture = RS::get_singleton()->texture_2d_layered_create(images, RS::TEXTURE_LAYERED_2D_ARRAY);
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}
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vrs_dirty = false;
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}
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return vrs_texture;
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}
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