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Ignore depth draw optimization when using depth draw alpha prepass

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This is necessary as the scene shader still uses alpha in this case so we can't discard fragments that weren't written to the depth buffer
This commit is contained in:
clayjohn
2023-01-03 09:26:15 -08:00
parent 26bed8aa85
commit 062fb8b0dc
10 changed files with 22 additions and 21 deletions
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4
servers/rendering/renderer_rd/forward_clustered/render_forward_clustered.cpp
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@@ -3465,7 +3465,7 @@ void RenderForwardClustered::_geometry_instance_add_surface_with_material(Geomet
if (has_alpha || has_read_screen_alpha || p_material->shader_data->depth_draw == SceneShaderForwardClustered::ShaderData::DEPTH_DRAW_DISABLED || p_material->shader_data->depth_test == SceneShaderForwardClustered::ShaderData::DEPTH_TEST_DISABLED) {
//material is only meant for alpha pass
flags |= GeometryInstanceSurfaceDataCache::FLAG_PASS_ALPHA;
if (p_material->shader_data->uses_depth_pre_pass && !(p_material->shader_data->depth_draw == SceneShaderForwardClustered::ShaderData::DEPTH_DRAW_DISABLED || p_material->shader_data->depth_test == SceneShaderForwardClustered::ShaderData::DEPTH_TEST_DISABLED)) {
if (p_material->shader_data->uses_depth_prepass_alpha && !(p_material->shader_data->depth_draw == SceneShaderForwardClustered::ShaderData::DEPTH_DRAW_DISABLED || p_material->shader_data->depth_test == SceneShaderForwardClustered::ShaderData::DEPTH_TEST_DISABLED)) {
flags |= GeometryInstanceSurfaceDataCache::FLAG_PASS_DEPTH;
flags |= GeometryInstanceSurfaceDataCache::FLAG_PASS_SHADOW;
}
@@ -3481,7 +3481,7 @@ void RenderForwardClustered::_geometry_instance_add_surface_with_material(Geomet
SceneShaderForwardClustered::MaterialData *material_shadow = nullptr;
void *surface_shadow = nullptr;
if (!p_material->shader_data->uses_particle_trails && !p_material->shader_data->writes_modelview_or_projection && !p_material->shader_data->uses_vertex && !p_material->shader_data->uses_position && !p_material->shader_data->uses_discard && !p_material->shader_data->uses_depth_pre_pass && !p_material->shader_data->uses_alpha_clip && p_material->shader_data->cull_mode == SceneShaderForwardClustered::ShaderData::CULL_BACK && !p_material->shader_data->uses_point_size) {
if (!p_material->shader_data->uses_particle_trails && !p_material->shader_data->writes_modelview_or_projection && !p_material->shader_data->uses_vertex && !p_material->shader_data->uses_position && !p_material->shader_data->uses_discard && !p_material->shader_data->uses_depth_prepass_alpha && !p_material->shader_data->uses_alpha_clip && p_material->shader_data->cull_mode == SceneShaderForwardClustered::ShaderData::CULL_BACK && !p_material->shader_data->uses_point_size) {
flags |= GeometryInstanceSurfaceDataCache::FLAG_USES_SHARED_SHADOW_MATERIAL;
material_shadow = static_cast<SceneShaderForwardClustered::MaterialData *>(RendererRD::MaterialStorage::get_singleton()->material_get_data(scene_shader.default_material, RendererRD::MaterialStorage::SHADER_TYPE_3D));

9
servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
View File

@@ -61,7 +61,7 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
uses_alpha = false;
uses_alpha_clip = false;
uses_blend_alpha = false;
uses_depth_pre_pass = false;
uses_depth_prepass_alpha = false;
uses_discard = false;
uses_roughness = false;
uses_normal = false;
@@ -114,7 +114,7 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
// Use alpha clip pipeline for alpha hash/dither.
// This prevents sorting issues inherent to alpha blending and allows such materials to cast shadows.
actions.usage_flag_pointers["ALPHA_HASH_SCALE"] = &uses_alpha_clip;
actions.render_mode_flags["depth_prepass_alpha"] = &uses_depth_pre_pass;
actions.render_mode_flags["depth_prepass_alpha"] = &uses_depth_prepass_alpha;
actions.usage_flag_pointers["SSS_STRENGTH"] = &uses_sss;
actions.usage_flag_pointers["SSS_TRANSMITTANCE_DEPTH"] = &uses_transmittance;
@@ -309,10 +309,11 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
}
RD::PipelineDepthStencilState depth_stencil = depth_stencil_state;
if (depth_pre_pass_enabled && casts_shadows()) {
if (depth_pre_pass_enabled && casts_shadows() && !uses_depth_prepass_alpha) {
// We already have a depth from the depth pre-pass, there is no need to write it again.
// In addition we can use COMPARE_OP_EQUAL instead of COMPARE_OP_LESS_OR_EQUAL.
// This way we can use the early depth test to discard transparent fragments before the fragment shader even starts.
// This cannot be used with depth_prepass_alpha as it uses a different threshold during the depth-prepass and regular drawing.
depth_stencil.depth_compare_operator = RD::COMPARE_OP_EQUAL;
depth_stencil.enable_depth_write = false;
}
@@ -394,7 +395,7 @@ bool SceneShaderForwardClustered::ShaderData::casts_shadows() const {
bool has_base_alpha = (uses_alpha && !uses_alpha_clip) || has_read_screen_alpha;
bool has_alpha = has_base_alpha || uses_blend_alpha;
return !has_alpha || (uses_depth_pre_pass && !(depth_draw == DEPTH_DRAW_DISABLED || depth_test == DEPTH_TEST_DISABLED));
return !has_alpha || (uses_depth_prepass_alpha && !(depth_draw == DEPTH_DRAW_DISABLED || depth_test == DEPTH_TEST_DISABLED));
}
RS::ShaderNativeSourceCode SceneShaderForwardClustered::ShaderData::get_native_source_code() const {

2
servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h
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@@ -153,7 +153,7 @@ public:
bool uses_alpha = false;
bool uses_blend_alpha = false;
bool uses_alpha_clip = false;
bool uses_depth_pre_pass = false;
bool uses_depth_prepass_alpha = false;
bool uses_discard = false;
bool uses_roughness = false;
bool uses_normal = false;