Extracting render buffers and changing it to a more generic solution

1 files changed, 127 insertions, 0 deletions

diff --git a/servers/rendering/renderer_rd/effects/fsr.cpp b/servers/rendering/renderer_rd/effects/fsr.cpp
new file mode 100644
index 0000000000..5fde24a926
--- /dev/null
+++ b/servers/rendering/renderer_rd/effects/fsr.cpp
@@ -0,0 +1,127 @@
+/*************************************************************************/
+/*  fsr.cpp                                                              */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "fsr.h"
+#include "servers/rendering/renderer_rd/uniform_set_cache_rd.h"
+
+using namespace RendererRD;
+
+FSR::FSR() {
+	Vector<String> FSR_upscale_modes;
+
+#if defined(MACOS_ENABLED) || defined(IOS_ENABLED)
+	// MoltenVK does not support some of the operations used by the normal mode of FSR. Fallback works just fine though.
+	FSR_upscale_modes.push_back("\n#define MODE_FSR_UPSCALE_FALLBACK\n");
+#else
+	// Everyone else can use normal mode when available.
+	if (RD::get_singleton()->has_feature(RD::SUPPORTS_FSR_HALF_FLOAT)) {
+		FSR_upscale_modes.push_back("\n#define MODE_FSR_UPSCALE_NORMAL\n");
+	} else {
+		FSR_upscale_modes.push_back("\n#define MODE_FSR_UPSCALE_FALLBACK\n");
+	}
+#endif
+
+	fsr_shader.initialize(FSR_upscale_modes);
+
+	shader_version = fsr_shader.version_create();
+	pipeline = RD::get_singleton()->compute_pipeline_create(fsr_shader.version_get_shader(shader_version, 0));
+}
+
+FSR::~FSR() {
+	fsr_shader.version_free(shader_version);
+}
+
+void FSR::fsr_upscale(Ref<RenderSceneBuffersRD> p_render_buffers, RID p_source_rd_texture, RID p_destination_texture) {
+	UniformSetCacheRD *uniform_set_cache = UniformSetCacheRD::get_singleton();
+	ERR_FAIL_NULL(uniform_set_cache);
+	MaterialStorage *material_storage = MaterialStorage::get_singleton();
+	ERR_FAIL_NULL(material_storage);
+
+	Size2i internal_size = p_render_buffers->get_internal_size();
+	Size2i target_size = p_render_buffers->get_target_size();
+	float fsr_upscale_sharpness = p_render_buffers->get_fsr_sharpness();
+
+	if (!p_render_buffers->has_texture(SNAME("FSR"), SNAME("upscale_texture"))) {
+		RD::DataFormat format = p_render_buffers->get_base_data_format();
+		uint32_t usage_bits = RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
+		uint32_t layers = 1; // we only need one layer, in multiview we're processing one layer at a time.
+
+		p_render_buffers->create_texture(SNAME("FSR"), SNAME("upscale_texture"), format, usage_bits, RD::TEXTURE_SAMPLES_1, target_size, layers);
+	}
+
+	RID upscale_texture = p_render_buffers->get_texture(SNAME("FSR"), SNAME("upscale_texture"));
+
+	FSRUpscalePushConstant push_constant;
+	memset(&push_constant, 0, sizeof(FSRUpscalePushConstant));
+
+	int dispatch_x = (target_size.x + 15) / 16;
+	int dispatch_y = (target_size.y + 15) / 16;
+
+	RD::ComputeListID compute_list = RD::get_singleton()->compute_list_begin();
+	RD::get_singleton()->compute_list_bind_compute_pipeline(compute_list, pipeline);
+
+	push_constant.resolution_width = internal_size.width;
+	push_constant.resolution_height = internal_size.height;
+	push_constant.upscaled_width = target_size.width;
+	push_constant.upscaled_height = target_size.height;
+	push_constant.sharpness = fsr_upscale_sharpness;
+
+	RID shader = fsr_shader.version_get_shader(shader_version, 0);
+	ERR_FAIL_COND(shader.is_null());
+
+	RID default_sampler = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
+
+	//FSR Easc
+	RD::Uniform u_source_rd_texture(RD::UNIFORM_TYPE_SAMPLER_WITH_TEXTURE, 0, { default_sampler, p_source_rd_texture });
+	RD::Uniform u_upscale_texture(RD::UNIFORM_TYPE_IMAGE, 0, { upscale_texture });
+
+	push_constant.pass = FSR_UPSCALE_PASS_EASU;
+	RD::get_singleton()->compute_list_bind_uniform_set(compute_list, uniform_set_cache->get_cache(shader, 0, u_source_rd_texture), 0);
+	RD::get_singleton()->compute_list_bind_uniform_set(compute_list, uniform_set_cache->get_cache(shader, 1, u_upscale_texture), 1);
+
+	RD::get_singleton()->compute_list_set_push_constant(compute_list, &push_constant, sizeof(FSRUpscalePushConstant));
+
+	RD::get_singleton()->compute_list_dispatch(compute_list, dispatch_x, dispatch_y, 1);
+	RD::get_singleton()->compute_list_add_barrier(compute_list);
+
+	//FSR Rcas
+	RD::Uniform u_upscale_texture_with_sampler(RD::UNIFORM_TYPE_SAMPLER_WITH_TEXTURE, 0, { default_sampler, upscale_texture });
+	RD::Uniform u_destination_texture(RD::UNIFORM_TYPE_IMAGE, 0, { p_destination_texture });
+
+	push_constant.pass = FSR_UPSCALE_PASS_RCAS;
+	RD::get_singleton()->compute_list_bind_uniform_set(compute_list, uniform_set_cache->get_cache(shader, 0, u_upscale_texture_with_sampler), 0);
+	RD::get_singleton()->compute_list_bind_uniform_set(compute_list, uniform_set_cache->get_cache(shader, 1, u_destination_texture), 1);
+
+	RD::get_singleton()->compute_list_set_push_constant(compute_list, &push_constant, sizeof(FSRUpscalePushConstant));
+
+	RD::get_singleton()->compute_list_dispatch(compute_list, dispatch_x, dispatch_y, 1);
+
+	RD::get_singleton()->compute_list_end(compute_list);
+}