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Add shader uniform hints for screen textures so users can specify custom filter and repeat modes.

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At this time, it works best in the Vulkan Renderers as they support using multiple samplers with the same texture.

In GLES3 this feature really only allows you to use the screen texture without mipmaps if you want to save the cost of generating them.
This commit is contained in:
clayjohn 2022-08-09 12:29:49 -04:00
parent ea4b8de2b4
commit 028ef2edc8
14 changed files with 189 additions and 51 deletions
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43
servers/rendering/shader_compiler.cpp
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@ -498,6 +498,11 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
for (const KeyValue<StringName, SL::ShaderNode::Uniform> &E : pnode->uniforms) {
if (SL::is_sampler_type(E.value.type)) {
if (E.value.hint == SL::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
E.value.hint == SL::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
E.value.hint == SL::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
continue; // Don't create uniforms in the generated code for these.
}
max_texture_uniforms++;
} else {
if (E.value.scope == SL::ShaderNode::Uniform::SCOPE_INSTANCE) {
@ -537,6 +542,13 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
p_actions.uniforms->insert(uniform_name, uniform);
continue; // Instances are indexed directly, don't need index uniforms.
}
if (uniform.hint == SL::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
uniform.hint == SL::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
uniform.hint == SL::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
continue; // Don't create uniforms in the generated code for these.
}
if (SL::is_sampler_type(uniform.type)) {
// Texture layouts are different for OpenGL GLSL and Vulkan GLSL
if (!RS::get_singleton()->is_low_end()) {
@ -892,12 +904,39 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
if (p_default_actions.renames.has(vnode->name)) {
code = p_default_actions.renames[vnode->name];
if (vnode->name == "SCREEN_TEXTURE") {
r_gen_code.uses_screen_texture_mipmaps = true;
}
} else {
if (shader->uniforms.has(vnode->name)) {
//its a uniform!
const ShaderLanguage::ShaderNode::Uniform &u = shader->uniforms[vnode->name];
if (u.texture_order >= 0) {
code = _mkid(vnode->name); //texture, use as is
StringName name = vnode->name;
if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE) {
name = "SCREEN_TEXTURE";
if (u.filter >= ShaderLanguage::FILTER_NEAREST_MIPMAP) {
r_gen_code.uses_screen_texture_mipmaps = true;
}
} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE) {
name = "NORMAL_ROUGHNESS_TEXTURE";
} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
name = "DEPTH_TEXTURE";
} else {
name = _mkid(vnode->name); //texture, use as is
}
if (p_default_actions.renames.has(name)) {
code = p_default_actions.renames[name];
} else {
code = name;
}
if (p_actions.usage_flag_pointers.has(name) && !used_flag_pointers.has(name)) {
*p_actions.usage_flag_pointers[name] = true;
used_flag_pointers.insert(name);
}
} else {
//a scalar or vector
if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
@ -1155,6 +1194,7 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
}
if (correct_texture_uniform) {
//TODO Needs to detect screen_texture hint as well
is_screen_texture = (texture_uniform == "SCREEN_TEXTURE");
String sampler_name;
@ -1404,6 +1444,7 @@ Error ShaderCompiler::compile(RS::ShaderMode p_mode, const String &p_code, Ident
r_gen_code.uses_fragment_time = false;
r_gen_code.uses_vertex_time = false;
r_gen_code.uses_global_textures = false;
r_gen_code.uses_screen_texture_mipmaps = false;
used_name_defines.clear();
used_rmode_defines.clear();