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Add an extra backbuffer color texture that can be used when an upscaler is in use.

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Fixes issue #83152. Due to how BLUR_0 is reused for multiple purposes and requires being at native resolution for some post-processing effects to work, FSR2 will use an alternate texture at internal size to use as the screen texture read by shaders instead. The rendering pipeline will prefer using this texture if it exists.
This commit is contained in:
Dario 2023-10-11 14:54:36 -03:00
parent 30f2a6d611
commit 4890e96556
3 changed files with 37 additions and 8 deletions
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26
servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
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@ -260,15 +260,29 @@ void RendererSceneRenderRD::_render_buffers_copy_screen_texture(const RenderData
RD::get_singleton()->draw_command_begin_label("Copy screen texture");
rb->allocate_blur_textures();
StringName texture_name;
bool can_use_storage = _render_buffers_can_be_storage();
Size2i size = rb->get_internal_size();
// When upscaling, the blur texture needs to be at the target size for post-processing to work. We prefer to use a
// dedicated backbuffer copy texture instead if the blur texture is not an option so shader effects work correctly.
Size2i target_size = rb->get_target_size();
bool internal_size_matches = (size.width == target_size.width) && (size.height == target_size.height);
bool reuse_blur_texture = !rb->has_upscaled_texture() || internal_size_matches;
if (reuse_blur_texture) {
rb->allocate_blur_textures();
texture_name = RB_TEX_BLUR_0;
} else {
uint32_t usage_bits = RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_CAN_COPY_TO_BIT;
usage_bits |= can_use_storage ? RD::TEXTURE_USAGE_STORAGE_BIT : RD::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT;
rb->create_texture(RB_SCOPE_BUFFERS, RB_TEX_BACK_COLOR, rb->get_base_data_format(), usage_bits);
texture_name = RB_TEX_BACK_COLOR;
}
for (uint32_t v = 0; v < rb->get_view_count(); v++) {
RID texture = rb->get_internal_texture(v);
int mipmaps = int(rb->get_texture_format(RB_SCOPE_BUFFERS, RB_TEX_BLUR_0).mipmaps);
RID dest = rb->get_texture_slice(RB_SCOPE_BUFFERS, RB_TEX_BLUR_0, v, 0);
int mipmaps = int(rb->get_texture_format(RB_SCOPE_BUFFERS, texture_name).mipmaps);
RID dest = rb->get_texture_slice(RB_SCOPE_BUFFERS, texture_name, v, 0);
if (can_use_storage) {
copy_effects->copy_to_rect(texture, dest, Rect2i(0, 0, size.x, size.y));
@ -279,8 +293,8 @@ void RendererSceneRenderRD::_render_buffers_copy_screen_texture(const RenderData
for (int i = 1; i < mipmaps; i++) {
RID source = dest;
dest = rb->get_texture_slice(RB_SCOPE_BUFFERS, RB_TEX_BLUR_0, v, i);
Size2i msize = rb->get_texture_slice_size(RB_SCOPE_BUFFERS, RB_TEX_BLUR_0, i);
dest = rb->get_texture_slice(RB_SCOPE_BUFFERS, texture_name, v, i);
Size2i msize = rb->get_texture_slice_size(RB_SCOPE_BUFFERS, texture_name, i);
if (can_use_storage) {
copy_effects->make_mipmap(source, dest, msize);