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Implemented AMD's FSR as a computer shader for upscaling 3D scenes

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This commit is contained in:
Je06jm
2021-11-23 14:16:03 -07:00
parent 5efe80f308
commit 20deb0917d
39 changed files with 4807 additions and 150 deletions
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110
servers/rendering/renderer_viewport.cpp
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@@ -77,18 +77,69 @@ void RendererViewport::_configure_3d_render_buffers(Viewport *p_viewport) {
RSG::scene->free(p_viewport->render_buffers);
p_viewport->render_buffers = RID();
} else {
float scale_3d = p_viewport->scale_3d;
if (Engine::get_singleton()->is_editor_hint()) {
// Ignore the 3D viewport render scaling inside of the editor.
// The Half Resolution 3D editor viewport option should be used instead.
scale_3d = 1.0;
float scaling_3d_scale = p_viewport->scaling_3d_scale;
RS::ViewportScaling3DMode scaling_3d_mode = p_viewport->scaling_3d_mode;
bool scaling_enabled = true;
if ((scaling_3d_mode == RS::VIEWPORT_SCALING_3D_MODE_FSR) && (scaling_3d_scale > 1.0)) {
// FSR is not design for downsampling.
// Throw a warning and fallback to VIEWPORT_SCALING_3D_MODE_BILINEAR
print_error("FSR does not support supersampling. Falling back to bilinear mode.");
scaling_3d_mode = RS::VIEWPORT_SCALING_3D_MODE_BILINEAR;
}
// Clamp 3D rendering resolution to reasonable values supported on most hardware.
// This prevents freezing the engine or outright crashing on lower-end GPUs.
const int width = CLAMP(p_viewport->size.width * scale_3d, 1, 16384);
const int height = CLAMP(p_viewport->size.height * scale_3d, 1, 16384);
RSG::scene->render_buffers_configure(p_viewport->render_buffers, p_viewport->render_target, width, height, p_viewport->msaa, p_viewport->screen_space_aa, p_viewport->use_debanding, p_viewport->get_view_count());
if ((scaling_3d_mode == RS::VIEWPORT_SCALING_3D_MODE_FSR) && !p_viewport->fsr_enabled) {
// FSR is not actually available.
// Throw a warning and fallback to disable scaling
print_error("FSR is not available. Disabled FSR scaling 3D. Try bilinear mode.");
scaling_enabled = false;
}
if (scaling_3d_scale == 1.0) {
scaling_enabled = false;
}
int width;
int height;
int render_width;
int render_height;
if (scaling_enabled) {
switch (scaling_3d_mode) {
case RS::VIEWPORT_SCALING_3D_MODE_BILINEAR:
// Clamp 3D rendering resolution to reasonable values supported on most hardware.
// This prevents freezing the engine or outright crashing on lower-end GPUs.
width = CLAMP(p_viewport->size.width * scaling_3d_scale, 1, 16384);
height = CLAMP(p_viewport->size.height * scaling_3d_scale, 1, 16384);
render_width = width;
render_height = height;
break;
case RS::VIEWPORT_SCALING_3D_MODE_FSR:
width = p_viewport->size.width;
height = p_viewport->size.height;
render_width = MAX(width * scaling_3d_scale, 1.0); // width / (width * scaling)
render_height = MAX(height * scaling_3d_scale, 1.0);
break;
default:
// This is an unknown mode.
print_error(vformat("Unknown scaling mode: %d, disabling scaling 3D", scaling_3d_mode));
width = p_viewport->size.width;
height = p_viewport->size.height;
render_width = width;
render_height = height;
break;
}
} else {
width = p_viewport->size.width;
height = p_viewport->size.height;
render_width = width;
render_height = height;
}
p_viewport->internal_size = Size2(render_width, render_height);
RSG::scene->render_buffers_configure(p_viewport->render_buffers, p_viewport->render_target, render_width, render_height, width, height, p_viewport->fsr_sharpness, p_viewport->fsr_mipmap_bias, p_viewport->msaa, p_viewport->screen_space_aa, p_viewport->use_debanding, p_viewport->get_view_count());
}
}
}
@@ -117,7 +168,7 @@ void RendererViewport::_draw_3d(Viewport *p_viewport) {
}
float screen_lod_threshold = p_viewport->lod_threshold / float(p_viewport->size.width);
RSG::scene->render_camera(p_viewport->render_buffers, p_viewport->camera, p_viewport->scenario, p_viewport->self, p_viewport->size, screen_lod_threshold, p_viewport->shadow_atlas, xr_interface, &p_viewport->render_info);
RSG::scene->render_camera(p_viewport->render_buffers, p_viewport->camera, p_viewport->scenario, p_viewport->self, p_viewport->internal_size, screen_lod_threshold, p_viewport->shadow_atlas, xr_interface, &p_viewport->render_info);
RENDER_TIMESTAMP("<End Rendering 3D Scene");
}
@@ -571,7 +622,7 @@ void RendererViewport::draw_viewports() {
// override our size, make sure it matches our required size and is created as a stereo target
vp->size = xr_interface->get_render_target_size();
uint32_t view_count = xr_interface->get_view_count();
RSG::storage->render_target_set_size(vp->render_target, vp->size.x, vp->size.y, view_count);
RSG::storage->render_target_set_size(vp->render_target, vp->internal_size.x, vp->internal_size.y, view_count);
// check for an external texture destination (disabled for now, not yet supported)
// RSG::storage->render_target_set_external_texture(vp->render_target, xr_interface->get_external_texture_for_eye(leftOrMono));
@@ -662,6 +713,8 @@ void RendererViewport::viewport_initialize(RID p_rid) {
viewport->render_target = RSG::storage->render_target_create();
viewport->shadow_atlas = RSG::scene->shadow_atlas_create();
viewport->viewport_render_direct_to_screen = false;
viewport->fsr_enabled = !RSG::rasterizer->is_low_end() && !viewport->disable_3d;
}
void RendererViewport::viewport_set_use_xr(RID p_viewport, bool p_use_xr) {
@@ -676,18 +729,42 @@ void RendererViewport::viewport_set_use_xr(RID p_viewport, bool p_use_xr) {
_configure_3d_render_buffers(viewport);
}
void RendererViewport::viewport_set_scale_3d(RID p_viewport, float p_scale_3d) {
void RendererViewport::viewport_set_scaling_3d_mode(RID p_viewport, RS::ViewportScaling3DMode p_mode) {
Viewport *viewport = viewport_owner.get_or_null(p_viewport);
ERR_FAIL_COND(!viewport);
viewport->scaling_3d_mode = p_mode;
_configure_3d_render_buffers(viewport);
}
void RendererViewport::viewport_set_fsr_sharpness(RID p_viewport, float p_sharpness) {
Viewport *viewport = viewport_owner.get_or_null(p_viewport);
ERR_FAIL_COND(!viewport);
viewport->fsr_sharpness = p_sharpness;
_configure_3d_render_buffers(viewport);
}
void RendererViewport::viewport_set_fsr_mipmap_bias(RID p_viewport, float p_mipmap_bias) {
Viewport *viewport = viewport_owner.get_or_null(p_viewport);
ERR_FAIL_COND(!viewport);
viewport->fsr_mipmap_bias = p_mipmap_bias;
_configure_3d_render_buffers(viewport);
}
void RendererViewport::viewport_set_scaling_3d_scale(RID p_viewport, float p_scaling_3d_scale) {
Viewport *viewport = viewport_owner.get_or_null(p_viewport);
ERR_FAIL_COND(!viewport);
// Clamp to reasonable values that are actually useful.
// Values above 2.0 don't serve a practical purpose since the viewport
// isn't displayed with mipmaps.
if (viewport->scale_3d == CLAMP(p_scale_3d, 0.1, 2.0)) {
if (viewport->scaling_3d_scale == CLAMP(p_scaling_3d_scale, 0.1, 2.0)) {
return;
}
viewport->scale_3d = CLAMP(p_scale_3d, 0.1, 2.0);
viewport->scaling_3d_scale = CLAMP(p_scaling_3d_scale, 0.1, 2.0);
_configure_3d_render_buffers(viewport);
}
@@ -713,6 +790,7 @@ void RendererViewport::viewport_set_size(RID p_viewport, int p_width, int p_heig
ERR_FAIL_COND(!viewport);
viewport->size = Size2(p_width, p_height);
uint32_t view_count = viewport->get_view_count();
RSG::storage->render_target_set_size(viewport->render_target, p_width, p_height, view_count);
_configure_3d_render_buffers(viewport);
@@ -765,7 +843,7 @@ void RendererViewport::viewport_attach_to_screen(RID p_viewport, const Rect2 &p_
// if render_direct_to_screen was used, reset size and position
if (RSG::rasterizer->is_low_end() && viewport->viewport_render_direct_to_screen) {
RSG::storage->render_target_set_position(viewport->render_target, 0, 0);
RSG::storage->render_target_set_size(viewport->render_target, viewport->size.x, viewport->size.y, viewport->get_view_count());
RSG::storage->render_target_set_size(viewport->render_target, viewport->internal_size.x, viewport->internal_size.y, viewport->get_view_count());
}
viewport->viewport_to_screen_rect = Rect2();