codegen

type BindingMapKey struct {
	Group   uint32
	Binding uint32
}

type BoundsCheckPolicies struct {
	// ImageLoad controls bounds checking for image load operations.
	ImageLoad BoundsCheckPolicy
	// ImageStore controls bounds checking for image store operations.
	ImageStore BoundsCheckPolicy
}

type BoundsCheckPolicy uint8

type Features uint32

type Options struct {
	// LangVersion is the target GLSL version.
	// Defaults to Version330 if zero.
	LangVersion Version

	// EntryPoint specifies which entry point to compile.
	// If empty, the first entry point is compiled.
	EntryPoint string

	// SamplerBindingBase adds offset to sampler binding indices.
	SamplerBindingBase uint32

	// TextureBindingBase adds offset to texture binding indices.
	TextureBindingBase uint32

	// UniformBindingBase adds offset to uniform buffer binding indices.
	UniformBindingBase uint32

	// StorageBindingBase adds offset to storage buffer binding indices.
	StorageBindingBase uint32

	// WriterFlags control output formatting.
	WriterFlags WriterFlags

	// ForceHighPrecision forces highp precision for all float types (ES only).
	// If false, uses default precision qualifiers.
	ForceHighPrecision bool

	// BoundsCheckPolicies controls bounds checking for resource accesses.
	// Matches Rust naga's proc::BoundsCheckPolicies.
	BoundsCheckPolicies BoundsCheckPolicies

	// BindingMap maps resource bindings to flat GL binding indices.
	// Matches Rust naga's back::glsl::BindingMap.
	// When set, layout(binding = N) qualifiers are emitted.
	BindingMap map[BindingMapKey]uint8

	// PipelineConstants provides values for pipeline-overridable constants.
	// Keys are either "@id(N)" numeric IDs as strings or override names.
	// Values are float64 (NaN means "not set, use default").
	// If provided, overrides are resolved before compilation.
	PipelineConstants ir.PipelineConstants
}

type TextureMapping struct {
	// TextureBinding is the (group, binding) of the texture global variable.
	TextureBinding ir.ResourceBinding

	// SamplerBinding is the (group, binding) of the associated sampler, if any.
	// Nil for storage images which have no sampler.
	SamplerBinding *ir.ResourceBinding
}

type TranslationInfo struct {
	// EntryPointNames maps original entry point names to generated GLSL names.
	EntryPointNames map[string]string

	// UsedExtensions lists GLSL extensions required by the shader.
	UsedExtensions []string

	// RequiredVersion is the minimum GLSL version needed for this shader.
	// May be higher than the requested version if features require it.
	RequiredVersion Version

	// TextureSamplerPairs lists the combined texture-sampler pairs generated.
	// Each entry is "textureName_samplerName".
	TextureSamplerPairs []string

	// TextureMappings maps combined sampler2D uniform names to their texture
	// and sampler source bindings. Used by GLES HAL to build SamplerBindMap
	// (bind GL sampler to texture's unit, not sampler's own binding).
	// Matches Rust naga ReflectionInfo.texture_mapping.
	TextureMappings map[string]TextureMapping

	// Uniforms maps global variable block names to their binding info.
	// Used by GLES HAL for runtime binding fallback on GL < 4.2 where
	// layout(binding=N) is unavailable. After glLinkProgram, the HAL
	// queries block indices by name and assigns bindings via GL calls.
	// Matches Rust naga ReflectionInfo.uniforms.
	Uniforms []UniformInfo
}

type UniformInfo struct {
	// BlockName is the GLSL block name (e.g., "Uniforms_block_0Vertex").
	// Used with glGetUniformBlockIndex (uniform buffers) or
	// glGetShaderStorageBlockIndex (storage buffers).
	BlockName string

	// Binding is the source (group, binding) from the IR.
	Binding ir.ResourceBinding

	// IsStorage is true for storage buffers (SSBO), false for uniform buffers (UBO).
	IsStorage bool
}

type Version struct {
	Major uint8
	Minor uint8
	ES    bool // true for GLSL ES (OpenGL ES / WebGL)
}

type Writer struct {
	textutil.IndentWriter // provides Out, Indent, WriteLine, WriteIndent, PushIndent, PopIndent
	// contains filtered or unexported fields
}

type WriterFlags uint32