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new feature level API for backends (#5784)

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* new feature level API for backends

backend can now return a "feature level", each level corresponds to a
"bundle" of features.
Level1: ES3.0 capabilities
Level2: ES3.1 capabilities + 31 textures + cubemap arrays

Currently metal always returns level 1, GL and Vulkan return level 2
if 31 textures or more are supported.

* Add public APIs for feature levels

* Add infrastructure to check feature levels in materials

* validate material feature level on use

The validation is done when creating a renderable. If the engine doesn't
support the material's feature level, an exception is thrown (or assert
if exceptions are not enabled).

* material documentation

* activate ESSL 3.10 for feature level 2

also generate #defines to identify available feature levels

* support for cubemap arrays in the public API


if feature level 2 is supported, cubemap arrays can be used from the
public API.

* add release notes
This commit is contained in:
Mathias Agopian
2022-08-17 10:14:26 -07:00
committed by GitHub
parent 7c092a8714
commit b2ec57776d
40 changed files with 513 additions and 114 deletions
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libs/filamat/src/shaders/ShaderGenerator.cpp
+4 -4
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@@ -181,7 +181,7 @@ std::string ShaderGenerator::createVertexProgram(ShaderModel shaderModel,
const CodeGenerator cg(shaderModel, targetApi, targetLanguage);
const bool lit = material.isLit;
cg.generateProlog(vs, ShaderType::VERTEX, material.hasExternalSamplers);
cg.generateProlog(vs, ShaderType::VERTEX, material);
cg.generateQualityDefine(vs, material.quality);
@@ -315,7 +315,7 @@ std::string ShaderGenerator::createFragmentProgram(ShaderModel shaderModel,
const bool lit = material.isLit;
io::sstream fs;
cg.generateProlog(fs, ShaderType::FRAGMENT, material.hasExternalSamplers);
cg.generateProlog(fs, ShaderType::FRAGMENT, material);
cg.generateQualityDefine(fs, material.quality);
@@ -536,7 +536,7 @@ std::string ShaderGenerator::createPostProcessVertexProgram(
const filament::Variant::type_t variantKey, SamplerBindingMap const& samplerBindingMap) const noexcept {
const CodeGenerator cg(sm, targetApi, targetLanguage);
io::sstream vs;
cg.generateProlog(vs, ShaderType::VERTEX, false);
cg.generateProlog(vs, ShaderType::VERTEX, material);
cg.generateQualityDefine(vs, material.quality);
@@ -577,7 +577,7 @@ std::string ShaderGenerator::createPostProcessFragmentProgram(
uint8_t variant, const SamplerBindingMap& samplerBindingMap) const noexcept {
const CodeGenerator cg(sm, targetApi, targetLanguage);
io::sstream fs;
cg.generateProlog(fs, ShaderType::FRAGMENT, false);
cg.generateProlog(fs, ShaderType::FRAGMENT, material);
cg.generateQualityDefine(fs, material.quality);