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test/source/blender/gpu/intern/gpu_shader_create_info.hh
Hans Goudey a68d39e9d9 Cleanup: Formatting 
Run `make format` after the library update in the previous commit.
2025-10-02 12:55:42 -04:00

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/* SPDX-FileCopyrightText: 2021 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup gpu
*
* Descriptor type used to define shader structure, resources and interfaces.
*
* Some rule of thumb:
* - Do not include anything else than this file in each info file.
*/
#pragma once
#if !defined(GPU_SHADER)
# include "BLI_hash.hh"
# include "BLI_string_ref.hh"
# include "BLI_utildefines_variadic.h"
# include "BLI_vector.hh"
# include "GPU_common_types.hh"
# include "GPU_material.hh"
# include "GPU_texture.hh"
# include <iostream>
#endif
#if defined(GPU_SHADER)
# include "gpu_shader_srd_cpp.hh"
#else
# include "gpu_shader_srd_info.hh"
#endif
/* Force enable `printf` support in release build. */
#define GPU_FORCE_ENABLE_SHADER_PRINTF 0
#if !defined(NDEBUG) || GPU_FORCE_ENABLE_SHADER_PRINTF
# define GPU_SHADER_PRINTF_ENABLE 1
#else
# define GPU_SHADER_PRINTF_ENABLE 0
#endif
#define GPU_SHADER_PRINTF_SLOT 13
#define GPU_SHADER_PRINTF_MAX_CAPACITY (1024 * 4)
/* Used for primitive expansion. */
#define GPU_SSBO_INDEX_BUF_SLOT 7
/* Used for polylines. */
#define GPU_SSBO_POLYLINE_POS_BUF_SLOT 0
#define GPU_SSBO_POLYLINE_COL_BUF_SLOT 1
#if defined(GLSL_CPP_STUBS)
# define GPU_SHADER_NAMED_INTERFACE_INFO(_interface, _inst_name) \
namespace interface::_interface { \
struct {
# define GPU_SHADER_NAMED_INTERFACE_END(_inst_name) \
} \
_inst_name; \
}
# define GPU_SHADER_INTERFACE_INFO(_interface) namespace interface::_interface {
# define GPU_SHADER_INTERFACE_END() }
# define GPU_SHADER_CREATE_INFO(_info) \
namespace _info { \
namespace gl_VertexShader { \
} \
namespace gl_FragmentShader { \
} \
namespace gl_ComputeShader { \
}
# define GPU_SHADER_CREATE_END() }
# define SHADER_LIBRARY_CREATE_INFO(_info) using namespace _info;
# define VERTEX_SHADER_CREATE_INFO(_info) \
using namespace ::gl_VertexShader; \
using namespace _info::gl_VertexShader; \
using namespace _info;
# define FRAGMENT_SHADER_CREATE_INFO(_info) \
using namespace ::gl_FragmentShader; \
using namespace _info::gl_FragmentShader; \
using namespace _info;
# define COMPUTE_SHADER_CREATE_INFO(_info) \
using namespace ::gl_ComputeShader; \
using namespace _info::gl_ComputeShader; \
using namespace _info;
#elif !defined(GPU_SHADER_CREATE_INFO)
/* Helps intellisense / auto-completion inside info files. */
# define GPU_SHADER_NAMED_INTERFACE_INFO(_interface, _inst_name) \
static inline void autocomplete_helper_interface_##_interface() \
{ \
StageInterfaceInfo _interface(#_interface, _inst_name); \
_interface
# define GPU_SHADER_INTERFACE_INFO(_interface) \
static inline void autocomplete_helper_interface_##_interface() \
{ \
StageInterfaceInfo _interface(#_interface); \
_interface
# define GPU_SHADER_CREATE_INFO(_info) \
static inline void autocomplete_helper_info_##_info() \
{ \
ShaderCreateInfo _info(#_info); \
_info
# define GPU_SHADER_NAMED_INTERFACE_END(_inst_name) \
; \
}
# define GPU_SHADER_INTERFACE_END() \
; \
}
# define GPU_SHADER_CREATE_END() \
; \
}
#endif
#ifndef GLSL_CPP_STUBS
# define SMOOTH(type, name) .smooth(Type::type##_t, #name)
# define FLAT(type, name) .flat(Type::type##_t, #name)
# define NO_PERSPECTIVE(type, name) .no_perspective(Type::type##_t, #name)
/* LOCAL_GROUP_SIZE(int size_x, int size_y = 1, int size_z = 1) */
# define LOCAL_GROUP_SIZE(...) .local_group_size(__VA_ARGS__)
# define VERTEX_IN(slot, type, name) .vertex_in(slot, Type::type##_t, #name)
# define VERTEX_IN_SRD(srd) .shared_resource_descriptor(srd::populate)
# define VERTEX_OUT(stage_interface) .vertex_out(stage_interface)
# define VERTEX_OUT_SRD(srd) .vertex_out(srd)
/* TO REMOVE. */
# define GEOMETRY_LAYOUT(...) .geometry_layout(__VA_ARGS__)
# define GEOMETRY_OUT(stage_interface) .geometry_out(stage_interface)
# define SUBPASS_IN(slot, type, img_type, name, rog) \
.subpass_in(slot, Type::type##_t, ImageType::img_type, #name, rog)
# define FRAGMENT_OUT(slot, type, name) .fragment_out(slot, Type::type##_t, #name)
# define FRAGMENT_OUT_SRD(srd) .shared_resource_descriptor(srd::populate)
# define FRAGMENT_OUT_DUAL(slot, type, name, blend) \
.fragment_out(slot, Type::type##_t, #name, DualBlend::blend)
# define FRAGMENT_OUT_ROG(slot, type, name, rog) \
.fragment_out(slot, Type::type##_t, #name, DualBlend::NONE, rog)
# define RESOURCE_SRD(srd) .shared_resource_descriptor(srd::populate)
# define EARLY_FRAGMENT_TEST(enable) .early_fragment_test(enable)
# define DEPTH_WRITE(value) .depth_write(value)
# define SPECIALIZATION_CONSTANT(type, name, default_value) \
.specialization_constant(Type::type##_t, #name, default_value)
# define COMPILATION_CONSTANT(type, name, value) \
.compilation_constant(Type::type##_t, #name, value)
# define PUSH_CONSTANT(type, name) .push_constant(Type::type##_t, #name)
# define PUSH_CONSTANT_ARRAY(type, name, array_size) \
.push_constant(Type::type##_t, #name, array_size)
# define UNIFORM_BUF(slot, type_name, name) .uniform_buf(slot, #type_name, #name)
# define UNIFORM_BUF_FREQ(slot, type_name, name, freq) \
.uniform_buf(slot, #type_name, #name, Frequency::freq)
# define STORAGE_BUF(slot, qualifiers, type_name, name) \
.storage_buf(slot, Qualifier::qualifiers, STRINGIFY(type_name), #name)
# define STORAGE_BUF_FREQ(slot, qualifiers, type_name, name, freq) \
.storage_buf(slot, Qualifier::qualifiers, STRINGIFY(type_name), #name, Frequency::freq)
# define SAMPLER(slot, type, name) .sampler(slot, ImageType::type, #name)
# define SAMPLER_FREQ(slot, type, name, freq) \
.sampler(slot, ImageType::type, #name, Frequency::freq)
# define IMAGE(slot, format, qualifiers, type, name) \
.image(slot, \
blender::gpu::TextureFormat::format, \
Qualifier::qualifiers, \
ImageReadWriteType::type, \
#name)
# define IMAGE_FREQ(slot, format, qualifiers, type, name, freq) \
.image(slot, \
blender::gpu::TextureFormat::format, \
Qualifier::qualifiers, \
ImageReadWriteType::type, \
#name, \
Frequency::freq)
# define GROUP_SHARED(type, name) .shared_variable(Type::type##_t, #name)
# define BUILTINS(builtin) .builtins(builtin)
# define VERTEX_SOURCE(filename) .vertex_source(filename)
# define FRAGMENT_SOURCE(filename) .fragment_source(filename)
# define COMPUTE_SOURCE(filename) .compute_source(filename)
# define VERTEX_FUNCTION(function) .vertex_function(function)
# define FRAGMENT_FUNCTION(function) .fragment_function(function)
# define COMPUTE_FUNCTION(function) .compute_function(function)
# define DEFINE(name) .define(name)
# define DEFINE_VALUE(name, value) .define(name, value)
# define DO_STATIC_COMPILATION() .do_static_compilation(true)
# define AUTO_RESOURCE_LOCATION() .auto_resource_location(true)
/* TO REMOVE. */
# define METAL_BACKEND_ONLY() .metal_backend_only(true)
# define ADDITIONAL_INFO(info_name) .additional_info(#info_name)
# define TYPEDEF_SOURCE(filename) .typedef_source(filename)
# define MTL_MAX_TOTAL_THREADS_PER_THREADGROUP(value) \
.mtl_max_total_threads_per_threadgroup(value)
#else
# define _read const
# define _write
# define _read_write
# define SMOOTH(type, name) type name = {};
# define FLAT(type, name) type name = {};
# define NO_PERSPECTIVE(type, name) type name = {};
/* LOCAL_GROUP_SIZE(int size_x, int size_y = -1, int size_z = -1) */
# define LOCAL_GROUP_SIZE(...)
# define VERTEX_IN(slot, type, name) \
namespace gl_VertexShader { \
const type name = {}; \
}
# define VERTEX_IN_SRD(srd) \
namespace gl_VertexShader { \
using namespace srd; \
}
# define VERTEX_OUT(stage_interface) using namespace interface::stage_interface;
# define VERTEX_OUT_SRD(srd) using namespace interface::srd;
/* TO REMOVE. */
# define GEOMETRY_LAYOUT(...)
# define GEOMETRY_OUT(stage_interface) using namespace interface::stage_interface;
# define SUBPASS_IN(slot, type, img_type, name, rog) const type name = {};
# define FRAGMENT_OUT(slot, type, name) \
namespace gl_FragmentShader { \
type name; \
}
# define FRAGMENT_OUT_DUAL(slot, type, name, blend) \
namespace gl_FragmentShader { \
type name; \
}
# define FRAGMENT_OUT_ROG(slot, type, name, rog) \
namespace gl_FragmentShader { \
type name; \
}
# define FRAGMENT_OUT_SRD(srd) \
namespace gl_FragmentShader { \
using namespace srd; \
}
# define RESOURCE_SRD(srd) using namespace srd;
# define EARLY_FRAGMENT_TEST(enable)
# define DEPTH_WRITE(value)
# define SPECIALIZATION_CONSTANT(type, name, default_value) \
constexpr type name = type(default_value);
# define COMPILATION_CONSTANT(type, name, value) constexpr type name = type(value);
# define PUSH_CONSTANT(type, name) extern const type name;
# define PUSH_CONSTANT_ARRAY(type, name, array_size) extern const type name[array_size];
# define UNIFORM_BUF(slot, type_name, name) extern const type_name name;
# define UNIFORM_BUF_FREQ(slot, type_name, name, freq) extern const type_name name;
# define STORAGE_BUF(slot, qualifiers, type_name, name) extern _##qualifiers type_name name;
# define STORAGE_BUF_FREQ(slot, qualifiers, type_name, name, freq) \
extern _##qualifiers type_name name;
# define SAMPLER(slot, type, name) type name;
# define SAMPLER_FREQ(slot, type, name, freq) type name;
# define IMAGE(slot, format, qualifiers, type, name) _##qualifiers type name;
# define IMAGE_FREQ(slot, format, qualifiers, type, name, freq) _##qualifiers type name;
# define GROUP_SHARED(type, name) type name;
# define BUILTINS(builtin)
# define VERTEX_SOURCE(filename)
# define FRAGMENT_SOURCE(filename)
# define COMPUTE_SOURCE(filename)
# define VERTEX_FUNCTION(filename)
# define FRAGMENT_FUNCTION(filename)
# define COMPUTE_FUNCTION(filename)
# define DEFINE(name)
# define DEFINE_VALUE(name, value)
# define DO_STATIC_COMPILATION()
# define AUTO_RESOURCE_LOCATION()
/* TO REMOVE. */
# define METAL_BACKEND_ONLY()
# define ADDITIONAL_INFO(info_name) \
using namespace info_name; \
using namespace info_name::gl_FragmentShader; \
using namespace info_name::gl_VertexShader;
# define TYPEDEF_SOURCE(filename)
# define MTL_MAX_TOTAL_THREADS_PER_THREADGROUP(value)
#endif
#define _INFO_EXPAND2(a, b) ADDITIONAL_INFO(a) ADDITIONAL_INFO(b)
#define _INFO_EXPAND3(a, b, c) _INFO_EXPAND2(a, b) ADDITIONAL_INFO(c)
#define _INFO_EXPAND4(a, b, c, d) _INFO_EXPAND3(a, b, c) ADDITIONAL_INFO(d)
#define _INFO_EXPAND5(a, b, c, d, e) _INFO_EXPAND4(a, b, c, d) ADDITIONAL_INFO(e)
#define _INFO_EXPAND6(a, b, c, d, e, f) _INFO_EXPAND5(a, b, c, d, e) ADDITIONAL_INFO(f)
#define ADDITIONAL_INFO_EXPAND(...) VA_NARGS_CALL_OVERLOAD(_INFO_EXPAND, __VA_ARGS__)
#define CREATE_INFO_VARIANT(name, ...) \
GPU_SHADER_CREATE_INFO(name) \
DO_STATIC_COMPILATION() \
ADDITIONAL_INFO_EXPAND(__VA_ARGS__) \
GPU_SHADER_CREATE_END()
#if !defined(GLSL_CPP_STUBS)
namespace blender::gpu {
struct GPUSource;
}
namespace blender::gpu::shader {
/* All of these functions is a bit out of place */
static inline Type to_type(const GPUType type)
{
switch (type) {
case GPU_FLOAT:
return Type::float_t;
case GPU_VEC2:
return Type::float2_t;
case GPU_VEC3:
return Type::float3_t;
case GPU_VEC4:
return Type::float4_t;
case GPU_MAT3:
return Type::float3x3_t;
case GPU_MAT4:
return Type::float4x4_t;
default:
BLI_assert_msg(0, "Error: Cannot convert GPUType to shader::Type.");
return Type::float_t;
}
}
static inline std::ostream &operator<<(std::ostream &stream, const Type type)
{
switch (type) {
case Type::float_t:
return stream << "float";
case Type::float2_t:
return stream << "vec2";
case Type::float3_t:
return stream << "vec3";
case Type::float4_t:
return stream << "vec4";
case Type::float3x3_t:
return stream << "mat3";
case Type::float4x4_t:
return stream << "mat4";
case Type::float3_10_10_10_2_t:
return stream << "vec3_1010102_Inorm";
case Type::uchar_t:
return stream << "uchar";
case Type::uchar2_t:
return stream << "uchar2";
case Type::uchar3_t:
return stream << "uchar3";
case Type::uchar4_t:
return stream << "uchar4";
case Type::char_t:
return stream << "char";
case Type::char2_t:
return stream << "char2";
case Type::char3_t:
return stream << "char3";
case Type::char4_t:
return stream << "char4";
case Type::int_t:
return stream << "int";
case Type::int2_t:
return stream << "ivec2";
case Type::int3_t:
return stream << "ivec3";
case Type::int4_t:
return stream << "ivec4";
case Type::uint_t:
return stream << "uint";
case Type::uint2_t:
return stream << "uvec2";
case Type::uint3_t:
return stream << "uvec3";
case Type::uint4_t:
return stream << "uvec4";
case Type::ushort_t:
return stream << "ushort";
case Type::ushort2_t:
return stream << "ushort2";
case Type::ushort3_t:
return stream << "ushort3";
case Type::ushort4_t:
return stream << "ushort4";
case Type::short_t:
return stream << "short";
case Type::short2_t:
return stream << "short2";
case Type::short3_t:
return stream << "short3";
case Type::short4_t:
return stream << "short4";
case Type::bool_t:
return stream << "bool";
default:
BLI_assert(0);
return stream;
}
}
static inline std::ostream &operator<<(std::ostream &stream, const GPUType type)
{
switch (type) {
case GPU_CLOSURE:
return stream << "Closure";
default:
return stream << to_type(type);
}
}
enum class BuiltinBits {
NONE = 0,
/**
* Allow getting barycentric coordinates inside the fragment shader.
* \note Emulated on OpenGL.
*/
BARYCENTRIC_COORD = (1 << 0),
STENCIL_REF = (1 << 1),
FRAG_COORD = (1 << 2),
FRONT_FACING = (1 << 4),
GLOBAL_INVOCATION_ID = (1 << 5),
INSTANCE_ID = (1 << 6),
/**
* Allow setting the target layer when the output is a layered frame-buffer.
* \note Emulated through geometry shader on older hardware.
*/
LAYER = (1 << 7),
LOCAL_INVOCATION_ID = (1 << 8),
LOCAL_INVOCATION_INDEX = (1 << 9),
NUM_WORK_GROUP = (1 << 10),
POINT_COORD = (1 << 11),
POINT_SIZE = (1 << 12),
PRIMITIVE_ID = (1 << 13),
VERTEX_ID = (1 << 14),
WORK_GROUP_ID = (1 << 15),
WORK_GROUP_SIZE = (1 << 16),
/**
* Allow setting the target viewport when using multi viewport feature.
* \note Emulated through geometry shader on older hardware.
*/
VIEWPORT_INDEX = (1 << 17),
/* Texture atomics requires usage options to alter compilation flag. */
TEXTURE_ATOMIC = (1 << 18),
/* Enable shader patching on GL to remap clip range to 0..1.
* Will do nothing if ClipControl is unsupported. */
CLIP_CONTROL = (1 << 19),
/* Not a builtin but a flag we use to tag shaders that use the debug features. */
USE_PRINTF = (1 << 28),
USE_DEBUG_DRAW = (1 << 29),
/* Shader source needs to be implemented at runtime. */
RUNTIME_GENERATED = (1 << 30),
};
ENUM_OPERATORS(BuiltinBits, BuiltinBits::USE_DEBUG_DRAW);
/**
* Follow convention described in:
* https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_conservative_depth.txt
*/
enum class DepthWrite {
/* UNCHANGED specified as default to indicate gl_FragDepth is not used. */
UNCHANGED = 0,
ANY,
GREATER,
LESS,
};
/* Samplers & images. */
enum class ImageType {
undefined = 0,
# define TYPES_EXPAND(s) \
Float##s, Uint##s, Int##s, sampler##s = Float##s, usampler##s = Uint##s, isampler##s = Int##s
/** Color samplers/image. */
TYPES_EXPAND(1D),
TYPES_EXPAND(1DArray),
TYPES_EXPAND(2D),
TYPES_EXPAND(2DArray),
TYPES_EXPAND(3D),
TYPES_EXPAND(Cube),
TYPES_EXPAND(CubeArray),
TYPES_EXPAND(Buffer),
# undef TYPES_EXPAND
# define TYPES_EXPAND(s) \
Shadow##s, Depth##s, sampler##s##Shadow = Shadow##s, sampler##s##Depth = Depth##s
/** Depth samplers (not supported as image). */
TYPES_EXPAND(2D),
TYPES_EXPAND(2DArray),
TYPES_EXPAND(Cube),
TYPES_EXPAND(CubeArray),
# undef TYPES_EXPAND
# define TYPES_EXPAND(s) \
AtomicUint##s, AtomicInt##s, usampler##s##Atomic = AtomicUint##s, \
isampler##s##Atomic = AtomicInt##s
/** Atomic texture type wrappers.
* For OpenGL, these map to the equivalent (U)INT_* types.
* NOTE: Atomic variants MUST be used if the texture bound to this resource has usage flag:
* `GPU_TEXTURE_USAGE_ATOMIC`, even if atomic texture operations are not used in the given
* shader.
* The shader source MUST also utilize the correct atomic sampler handle e.g.
* `usampler2DAtomic` in conjunction with these types, for passing texture/image resources into
* functions. */
TYPES_EXPAND(2D),
TYPES_EXPAND(2DArray),
TYPES_EXPAND(3D),
# undef TYPES_EXPAND
};
/* Samplers & images. */
enum class ImageReadWriteType {
undefined = 0,
# define TYPES_EXPAND(s) \
Float##s = int(ImageType::Float##s), Uint##s = int(ImageType::Uint##s), \
Int##s = int(ImageType::Int##s), image##s = Float##s, uimage##s = Uint##s, iimage##s = Int##s
/** Color image. */
TYPES_EXPAND(1D),
TYPES_EXPAND(1DArray),
TYPES_EXPAND(2D),
TYPES_EXPAND(2DArray),
TYPES_EXPAND(3D),
# undef TYPES_EXPAND
# define TYPES_EXPAND(s) \
AtomicUint##s = int(ImageType::AtomicUint##s), AtomicInt##s = int(ImageType::AtomicInt##s), \
uimage##s##Atomic = AtomicUint##s, iimage##s##Atomic = AtomicInt##s
/** Atomic texture type wrappers.
* For OpenGL, these map to the equivalent (U)INT_* types.
* NOTE: Atomic variants MUST be used if the texture bound to this resource has usage flag:
* `GPU_TEXTURE_USAGE_ATOMIC`, even if atomic texture operations are not used in the given
* shader.
* The shader source MUST also utilize the correct atomic sampler handle e.g.
* `usampler2DAtomic` in conjunction with these types, for passing texture/image resources into
* functions. */
TYPES_EXPAND(2D),
TYPES_EXPAND(2DArray),
TYPES_EXPAND(3D),
# undef TYPES_EXPAND
};
/* Storage qualifiers. */
enum class Qualifier {
/** Restrict flag is set by default. Unless specified otherwise. */
no_restrict = (1 << 0),
read = (1 << 1),
write = (1 << 2),
/** Shorthand version of combined flags. */
read_write = read | write,
QUALIFIER_MAX = (write << 1) - 1,
};
ENUM_OPERATORS(Qualifier, Qualifier::QUALIFIER_MAX);
/** Maps to different descriptor sets. */
enum class Frequency {
BATCH = 0,
PASS,
/** Special frequency tag that will automatically source storage buffers from GPUBatch. */
GEOMETRY,
};
/** Dual Source Blending Index. */
enum class DualBlend {
NONE = 0,
SRC_0,
SRC_1,
};
/** Interpolation qualifiers. */
enum class Interpolation {
SMOOTH = 0,
FLAT,
NO_PERSPECTIVE,
};
/** Input layout for geometry shader. */
enum class PrimitiveIn {
POINTS = 0,
LINES,
LINES_ADJACENCY,
TRIANGLES,
TRIANGLES_ADJACENCY,
};
/** Output layout for geometry shader. */
enum class PrimitiveOut {
POINTS = 0,
LINE_STRIP,
TRIANGLE_STRIP,
LINES,
TRIANGLES,
};
struct StageInterfaceInfo {
struct InOut {
Interpolation interp;
Type type;
StringRefNull name;
};
StringRefNull name;
/**
* Name of the instance of the block (used to access).
* Can be empty string (i.e: "") only if not using geometry shader.
*/
StringRefNull instance_name;
/** List of all members of the interface. */
Vector<InOut> inouts;
StageInterfaceInfo(const char *name_, const char *instance_name_ = "")
: name(name_), instance_name(instance_name_) {};
~StageInterfaceInfo() = default;
using Self = StageInterfaceInfo;
Self &smooth(Type type, StringRefNull _name)
{
inouts.append({Interpolation::SMOOTH, type, _name});
return *(Self *)this;
}
Self &flat(Type type, StringRefNull _name)
{
inouts.append({Interpolation::FLAT, type, _name});
return *(Self *)this;
}
Self &no_perspective(Type type, StringRefNull _name)
{
inouts.append({Interpolation::NO_PERSPECTIVE, type, _name});
return *(Self *)this;
}
};
/** Sources from generated code. Map source name to content. */
struct GeneratedSource {
/* Associated filename this source replaces. */
StringRefNull filename;
Vector<StringRefNull> dependencies;
std::string content;
};
using GeneratedSourceList = Vector<shader::GeneratedSource, 0>;
/**
* \brief Describe inputs & outputs, stage interfaces, resources and sources of a shader.
* If all data is correctly provided, this is all that is needed to create and compile
* a #blender::gpu::Shader.
*
* IMPORTANT: All strings are references only. Make sure all the strings used by a
* #ShaderCreateInfo are not freed until it is consumed or deleted.
*/
struct ShaderCreateInfo {
/** Shader name for debugging. */
StringRefNull name_;
/** True if the shader is static and can be pre-compiled at compile time. */
bool do_static_compilation_ = false;
/** True if the shader is not part of gpu_shader_create_info_list. */
bool is_generated_ = true;
/** If true, all additionally linked create info will be merged into this one. */
bool finalized_ = false;
/** If true, all resources will have an automatic location assigned. */
bool auto_resource_location_ = false;
/** If true, force depth and stencil tests to always happen before fragment shader invocation. */
bool early_fragment_test_ = false;
/** Allow optimization when fragment shader writes to `gl_FragDepth`. */
DepthWrite depth_write_ = DepthWrite::UNCHANGED;
/** GPU Backend compatibility flag. Temporary requirement until Metal enablement is fully
* complete. */
bool metal_backend_only_ = false;
/**
* Maximum length of all the resource names including each null terminator.
* Only for names used by #gpu::ShaderInterface.
*/
size_t interface_names_size_ = 0;
/** Manually set builtins. */
BuiltinBits builtins_ = BuiltinBits::NONE;
/** Manually set generated code. */
std::string vertex_source_generated;
std::string fragment_source_generated;
std::string compute_source_generated;
std::string geometry_source_generated;
std::string typedef_source_generated;
/** Manually set generated dependencies file names. */
Vector<StringRefNull, 0> dependencies_generated;
GeneratedSourceList generated_sources;
/* Same as StringRefNull but with a few extra member functions. */
struct ResourceString : public StringRefNull {
constexpr ResourceString() : StringRefNull() {}
constexpr ResourceString(const char *str, int64_t size) : StringRefNull(str, size) {}
ResourceString(std::nullptr_t) = delete;
constexpr ResourceString(const char *str) : StringRefNull(str) {}
ResourceString(const std::string &str) : StringRefNull(str) {}
ResourceString(const StringRefNull &str) : StringRefNull(str) {}
int64_t array_offset() const
{
return this->find_first_of("[");
}
bool is_array() const
{
return array_offset() != -1;
}
StringRef str_no_array() const
{
return StringRef(this->c_str(), this->array_offset());
}
StringRef str_only_array() const
{
return this->substr(this->array_offset());
}
};
# define TEST_EQUAL(a, b, _member) \
if (!((a)._member == (b)._member)) { \
return false; \
}
# define TEST_VECTOR_EQUAL(a, b, _vector) \
TEST_EQUAL(a, b, _vector.size()); \
for (auto i : _vector.index_range()) { \
TEST_EQUAL(a, b, _vector[i]); \
}
struct VertIn {
int index;
Type type;
StringRefNull name;
bool operator==(const VertIn &b) const
{
TEST_EQUAL(*this, b, index);
TEST_EQUAL(*this, b, type);
TEST_EQUAL(*this, b, name);
return true;
}
};
Vector<VertIn> vertex_inputs_;
struct GeometryStageLayout {
PrimitiveIn primitive_in;
int invocations;
PrimitiveOut primitive_out;
/** Set to -1 by default to check if used. */
int max_vertices = -1;
bool operator==(const GeometryStageLayout &b) const
{
TEST_EQUAL(*this, b, primitive_in);
TEST_EQUAL(*this, b, invocations);
TEST_EQUAL(*this, b, primitive_out);
TEST_EQUAL(*this, b, max_vertices);
return true;
}
};
GeometryStageLayout geometry_layout_;
struct ComputeStageLayout {
int local_size_x = -1;
int local_size_y = -1;
int local_size_z = -1;
bool operator==(const ComputeStageLayout &b) const
{
TEST_EQUAL(*this, b, local_size_x);
TEST_EQUAL(*this, b, local_size_y);
TEST_EQUAL(*this, b, local_size_z);
return true;
}
};
ComputeStageLayout compute_layout_;
struct FragOut {
int index;
Type type;
DualBlend blend;
StringRefNull name;
/* NOTE: Currently only supported by Metal. */
int raster_order_group;
bool operator==(const FragOut &b) const
{
TEST_EQUAL(*this, b, index);
TEST_EQUAL(*this, b, type);
TEST_EQUAL(*this, b, blend);
TEST_EQUAL(*this, b, name);
TEST_EQUAL(*this, b, raster_order_group);
return true;
}
};
Vector<FragOut> fragment_outputs_;
struct SubpassIn {
int index;
Type type;
ImageType img_type;
StringRefNull name;
/* NOTE: Currently only supported by Metal. */
int raster_order_group;
bool operator==(const SubpassIn &b) const
{
TEST_EQUAL(*this, b, index);
TEST_EQUAL(*this, b, type);
TEST_EQUAL(*this, b, img_type);
TEST_EQUAL(*this, b, name);
TEST_EQUAL(*this, b, raster_order_group);
return true;
}
};
Vector<SubpassIn> subpass_inputs_;
Vector<CompilationConstant, 0> compilation_constants_;
Vector<SpecializationConstant> specialization_constants_;
struct SharedVariable {
Type type;
ResourceString name;
};
Vector<SharedVariable, 0> shared_variables_;
struct Sampler {
ImageType type;
GPUSamplerState sampler;
StringRefNull name;
};
struct Image {
TextureFormat format;
ImageType type;
Qualifier qualifiers;
StringRefNull name;
};
struct UniformBuf {
StringRefNull type_name;
ResourceString name;
};
struct StorageBuf {
Qualifier qualifiers;
StringRefNull type_name;
ResourceString name;
};
struct Resource {
enum BindType {
UNIFORM_BUFFER = 0,
STORAGE_BUFFER,
SAMPLER,
IMAGE,
};
BindType bind_type;
int slot;
union {
Sampler sampler;
Image image;
UniformBuf uniformbuf;
StorageBuf storagebuf;
};
Resource(BindType type, int _slot) : bind_type(type), slot(_slot) {};
bool operator==(const Resource &b) const
{
TEST_EQUAL(*this, b, bind_type);
TEST_EQUAL(*this, b, slot);
switch (bind_type) {
case UNIFORM_BUFFER:
TEST_EQUAL(*this, b, uniformbuf.type_name);
TEST_EQUAL(*this, b, uniformbuf.name);
break;
case STORAGE_BUFFER:
TEST_EQUAL(*this, b, storagebuf.qualifiers);
TEST_EQUAL(*this, b, storagebuf.type_name);
TEST_EQUAL(*this, b, storagebuf.name);
break;
case SAMPLER:
TEST_EQUAL(*this, b, sampler.type);
TEST_EQUAL(*this, b, sampler.sampler);
TEST_EQUAL(*this, b, sampler.name);
break;
case IMAGE:
TEST_EQUAL(*this, b, image.format);
TEST_EQUAL(*this, b, image.type);
TEST_EQUAL(*this, b, image.qualifiers);
TEST_EQUAL(*this, b, image.name);
break;
}
return true;
}
};
/**
* Resources are grouped by frequency of change.
* Pass resources are meant to be valid for the whole pass.
* Batch resources can be changed in a more granular manner (per object/material).
* Geometry resources can be changed in a very granular manner (per draw-call).
* Misuse will only produce suboptimal performance.
*/
Vector<Resource> pass_resources_, batch_resources_, geometry_resources_;
Vector<Resource> &resources_get_(Frequency freq)
{
switch (freq) {
case Frequency::PASS:
return pass_resources_;
case Frequency::BATCH:
return batch_resources_;
case Frequency::GEOMETRY:
return geometry_resources_;
}
BLI_assert_unreachable();
return pass_resources_;
}
/* Return all resources regardless of their frequency. */
Vector<Resource> resources_get_all_() const
{
Vector<Resource> all_resources;
all_resources.extend(pass_resources_);
all_resources.extend(batch_resources_);
all_resources.extend(geometry_resources_);
return all_resources;
}
Vector<StageInterfaceInfo *> vertex_out_interfaces_;
Vector<StageInterfaceInfo *> geometry_out_interfaces_;
struct PushConst {
Type type;
ResourceString name;
int array_size;
bool operator==(const PushConst &b) const
{
TEST_EQUAL(*this, b, type);
TEST_EQUAL(*this, b, name);
TEST_EQUAL(*this, b, array_size);
return true;
}
};
Vector<PushConst> push_constants_;
/* Sources for resources type definitions. */
Vector<StringRefNull> typedef_sources_;
StringRefNull vertex_source_, geometry_source_, fragment_source_, compute_source_;
StringRefNull vertex_entry_fn_ = "main", geometry_entry_fn_ = "main",
fragment_entry_fn_ = "main", compute_entry_fn_ = "main";
Vector<std::array<StringRefNull, 2>> defines_;
/**
* Name of other infos to recursively merge with this one.
* No data slot must overlap otherwise we throw an error.
*/
Vector<StringRefNull> additional_infos_;
/* API-specific parameters. */
# ifdef WITH_METAL_BACKEND
ushort mtl_max_threads_per_threadgroup_ = 0;
# endif
public:
ShaderCreateInfo(const char *name) : name_(name) {};
~ShaderCreateInfo() = default;
using Self = ShaderCreateInfo;
/* -------------------------------------------------------------------- */
/** \name Shaders in/outs (fixed function pipeline config)
* \{ */
Self &vertex_in(int slot, Type type, StringRefNull name)
{
vertex_inputs_.append({slot, type, name});
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
Self &vertex_out(StageInterfaceInfo &interface)
{
vertex_out_interfaces_.append(&interface);
return *(Self *)this;
}
Self &geometry_layout(PrimitiveIn prim_in,
PrimitiveOut prim_out,
int max_vertices,
int invocations = -1)
{
geometry_layout_.primitive_in = prim_in;
geometry_layout_.primitive_out = prim_out;
geometry_layout_.max_vertices = max_vertices;
geometry_layout_.invocations = invocations;
return *(Self *)this;
}
Self &local_group_size(int local_size_x, int local_size_y = 1, int local_size_z = 1)
{
compute_layout_.local_size_x = local_size_x;
compute_layout_.local_size_y = local_size_y;
compute_layout_.local_size_z = local_size_z;
return *(Self *)this;
}
/**
* Force fragment tests before fragment shader invocation.
* IMPORTANT: This is incompatible with using the gl_FragDepth output.
*/
Self &early_fragment_test(bool enable)
{
early_fragment_test_ = enable;
return *(Self *)this;
}
/**
* Only needed if geometry shader is enabled.
* IMPORTANT: Input and output instance name will have respectively "_in" and "_out" suffix
* appended in the geometry shader IF AND ONLY IF the vertex_out interface instance name matches
* the geometry_out interface instance name.
*/
Self &geometry_out(StageInterfaceInfo &interface)
{
geometry_out_interfaces_.append(&interface);
return *(Self *)this;
}
Self &fragment_out(int slot,
Type type,
StringRefNull name,
DualBlend blend = DualBlend::NONE,
int raster_order_group = -1)
{
fragment_outputs_.append({slot, type, blend, name, raster_order_group});
return *(Self *)this;
}
/**
* Allows to fetch frame-buffer values from previous render sub-pass.
*
* On Apple Silicon, the additional `raster_order_group` is there to set the sub-pass
* dependencies. Any sub-pass input need to have the same `raster_order_group` defined in the
* shader writing them.
*
* IMPORTANT: Currently emulated on all backend except Metal. This is only for debugging purpose
* as it is too slow to be viable.
*
* TODO(fclem): Vulkan can implement that using `subpassInput`. However sub-pass boundaries might
* be difficult to inject implicitly and will require more high level changes.
* TODO(fclem): OpenGL can emulate that using `GL_EXT_shader_framebuffer_fetch`.
*/
Self &subpass_in(
int slot, Type type, ImageType img_type, StringRefNull name, int raster_order_group = -1)
{
subpass_inputs_.append({slot, type, img_type, name, raster_order_group});
return *(Self *)this;
}
Self &shared_resource_descriptor(void (*fn)(ShaderCreateInfo &))
{
fn(*this);
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Shader compilation constants
*
* Compilation constants are constants defined in the create info.
* They cannot be changed after the shader is created.
* It is a replacement to macros with added type safety.
* \{ */
Self &compilation_constant(Type type, StringRefNull name, double default_value)
{
CompilationConstant constant;
constant.type = type;
constant.name = name;
switch (type) {
case Type::int_t:
constant.value.i = int(default_value);
break;
case Type::bool_t:
case Type::uint_t:
constant.value.u = uint(default_value);
break;
default:
BLI_assert_msg(0, "Only scalar integer and bool types can be used as constants");
break;
}
compilation_constants_.append(constant);
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Shader specialization constants
* \{ */
/* Adds a specialization constant which is a dynamically modifiable value, which will be
* statically compiled into a PSO configuration to provide optimal runtime performance,
* with a reduced re-compilation cost vs Macro's with easier generation of unique permutations
* based on run-time values.
*
* Tip: To evaluate use-cases of where specialization constants can provide a performance
* gain, benchmark a given shader in its default case. Attempt to statically disable branches or
* conditions which rely on uniform look-ups and measure if there is a marked improvement in
* performance and/or reduction in memory bandwidth/register pressure.
*
* NOTE: Specialization constants will incur new compilation of PSOs and thus can incur an
* unexpected cost. Specialization constants should be reserved for infrequently changing
* parameters (e.g. user setting parameters such as toggling of features or quality level
* presets), or those with a low set of possible runtime permutations.
*
* Specialization constants are assigned at runtime using:
* - `GPU_shader_constant_*(shader, name, value)`
* or
* - `DrawPass::specialize_constant(shader, name, value)`
*
* All constants **MUST** be specified before binding a shader.
*/
Self &specialization_constant(Type type, StringRefNull name, double default_value)
{
SpecializationConstant constant;
constant.type = type;
constant.name = name;
switch (type) {
case Type::int_t:
constant.value.i = int(default_value);
break;
case Type::bool_t:
case Type::uint_t:
constant.value.u = uint(default_value);
break;
case Type::float_t:
constant.value.f = float(default_value);
break;
default:
BLI_assert_msg(0, "Only scalar types can be used as constants");
break;
}
specialization_constants_.append(constant);
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
/* TODO: Add API to specify unique specialization config permutations in CreateInfo, allowing
* specialized compilation to be primed and handled in the background at start-up, rather than
* waiting for a given permutation to occur dynamically. */
/** \} */
/* -------------------------------------------------------------------- */
/** \name Compute shader Shared variables
* \{ */
Self &shared_variable(Type type, StringRefNull name)
{
shared_variables_.append({type, name});
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Resources bindings points
* \{ */
Self &uniform_buf(int slot,
StringRefNull type_name,
StringRefNull name,
Frequency freq = Frequency::PASS)
{
Resource res(Resource::BindType::UNIFORM_BUFFER, slot);
res.uniformbuf.name = name;
res.uniformbuf.type_name = type_name;
resources_get_(freq).append(res);
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
Self &storage_buf(int slot,
Qualifier qualifiers,
StringRefNull type_name,
StringRefNull name,
Frequency freq = Frequency::PASS)
{
Resource res(Resource::BindType::STORAGE_BUFFER, slot);
res.storagebuf.qualifiers = qualifiers;
res.storagebuf.type_name = type_name;
res.storagebuf.name = name;
resources_get_(freq).append(res);
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
Self &image(int slot,
TextureFormat format,
Qualifier qualifiers,
ImageReadWriteType type,
StringRefNull name,
Frequency freq = Frequency::PASS)
{
Resource res(Resource::BindType::IMAGE, slot);
res.image.format = format;
res.image.qualifiers = qualifiers;
res.image.type = ImageType(type);
res.image.name = name;
resources_get_(freq).append(res);
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
Self &sampler(int slot,
ImageType type,
StringRefNull name,
Frequency freq = Frequency::PASS,
GPUSamplerState sampler = GPUSamplerState::internal_sampler())
{
Resource res(Resource::BindType::SAMPLER, slot);
res.sampler.type = type;
res.sampler.name = name;
/* Produces ASAN errors for the moment. */
// res.sampler.sampler = sampler;
UNUSED_VARS(sampler);
resources_get_(freq).append(res);
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Shader Source
* \{ */
Self &vertex_source(StringRefNull filename)
{
vertex_source_ = filename;
return *(Self *)this;
}
Self &fragment_source(StringRefNull filename)
{
fragment_source_ = filename;
return *(Self *)this;
}
Self &compute_source(StringRefNull filename)
{
compute_source_ = filename;
return *(Self *)this;
}
Self &vertex_function(StringRefNull function_name)
{
vertex_entry_fn_ = function_name;
return *(Self *)this;
}
Self &fragment_function(StringRefNull function_name)
{
fragment_entry_fn_ = function_name;
return *(Self *)this;
}
Self &compute_function(StringRefNull function_name)
{
compute_entry_fn_ = function_name;
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Push constants
*
* Data managed by blender::gpu::Shader. Can be set through uniform functions. Must be less than
* 128bytes.
* \{ */
Self &push_constant(Type type, StringRefNull name, int array_size = 0)
{
/* We don't have support for UINT push constants yet, use INT instead. */
BLI_assert(type != Type::uint_t);
BLI_assert_msg(name.find("[") == -1,
"Array syntax is forbidden for push constants."
"Use the array_size parameter instead.");
push_constants_.append({type, name, array_size});
interface_names_size_ += name.size() + 1;
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Defines
* \{ */
Self &define(StringRefNull name, StringRefNull value = "")
{
defines_.append({name, value});
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Defines
* \{ */
Self &do_static_compilation(bool value)
{
do_static_compilation_ = value;
return *(Self *)this;
}
Self &builtins(BuiltinBits builtin)
{
builtins_ |= builtin;
return *(Self *)this;
}
/* Defines how the fragment shader will write to gl_FragDepth. */
Self &depth_write(DepthWrite value)
{
depth_write_ = value;
return *(Self *)this;
}
Self &auto_resource_location(bool value)
{
auto_resource_location_ = value;
return *(Self *)this;
}
Self &metal_backend_only(bool flag)
{
metal_backend_only_ = flag;
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Additional Create Info
*
* Used to share parts of the infos that are common to many shaders.
* \{ */
Self &additional_info(StringRefNull info_name)
{
additional_infos_.append(info_name);
return *(Self *)this;
}
template<typename... Args> Self &additional_info(StringRefNull info_name, Args... args)
{
additional_info(info_name);
additional_info(args...);
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Typedef Sources
*
* Some resource declarations might need some special structure defined.
* Adding a file using typedef_source will include it before the resource
* and interface definitions.
* \{ */
Self &typedef_source(StringRefNull filename)
{
typedef_sources_.append(filename);
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name API-Specific Parameters
*
* Optional parameters exposed by specific back-ends to enable additional features and
* performance tuning.
* NOTE: These functions can be exposed as a pass-through on unsupported configurations.
* \{ */
/**
* \name mtl_max_total_threads_per_threadgroup
* \a max_total_threads_per_threadgroup - Provides compiler hint for maximum threadgroup size up
* front. Maximum value is 1024.
*/
Self &mtl_max_total_threads_per_threadgroup(ushort max_total_threads_per_threadgroup)
{
# ifdef WITH_METAL_BACKEND
mtl_max_threads_per_threadgroup_ = max_total_threads_per_threadgroup;
# else
UNUSED_VARS(max_total_threads_per_threadgroup);
# endif
return *(Self *)this;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Recursive evaluation.
*
* Flatten all dependency so that this descriptor contains all the data from the additional
* descriptors. This avoids tedious traversal in shader source creation.
* \{ */
/* WARNING: Recursive evaluation is not thread safe.
* Non-recursive evaluation expects their dependencies to be already finalized.
* (All statically declared CreateInfos are automatically finalized at startup) */
void finalize(const bool recursive = false);
void resource_guard_defines(std::string &defines) const;
std::string check_error() const;
bool is_vulkan_compatible() const;
/** Error detection that some backend compilers do not complain about. */
void validate_merge(const ShaderCreateInfo &other_info);
void validate_vertex_attributes(const ShaderCreateInfo *other_info = nullptr);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Operators.
*
* \{ */
/* Comparison operator for GPUPass cache. We only compare if it will create the same shader
* code. So we do not compare name and some other internal stuff. */
bool operator==(const ShaderCreateInfo &b) const
{
TEST_EQUAL(*this, b, builtins_);
TEST_EQUAL(*this, b, vertex_source_generated);
TEST_EQUAL(*this, b, fragment_source_generated);
TEST_EQUAL(*this, b, compute_source_generated);
TEST_EQUAL(*this, b, typedef_source_generated);
TEST_VECTOR_EQUAL(*this, b, vertex_inputs_);
TEST_EQUAL(*this, b, geometry_layout_);
TEST_EQUAL(*this, b, compute_layout_);
TEST_VECTOR_EQUAL(*this, b, fragment_outputs_);
TEST_VECTOR_EQUAL(*this, b, pass_resources_);
TEST_VECTOR_EQUAL(*this, b, batch_resources_);
TEST_VECTOR_EQUAL(*this, b, geometry_resources_);
TEST_VECTOR_EQUAL(*this, b, vertex_out_interfaces_);
TEST_VECTOR_EQUAL(*this, b, geometry_out_interfaces_);
TEST_VECTOR_EQUAL(*this, b, push_constants_);
TEST_VECTOR_EQUAL(*this, b, typedef_sources_);
TEST_VECTOR_EQUAL(*this, b, subpass_inputs_);
TEST_EQUAL(*this, b, vertex_source_);
TEST_EQUAL(*this, b, geometry_source_);
TEST_EQUAL(*this, b, fragment_source_);
TEST_EQUAL(*this, b, compute_source_);
TEST_VECTOR_EQUAL(*this, b, additional_infos_);
TEST_VECTOR_EQUAL(*this, b, defines_);
return true;
}
/** Debug print */
friend std::ostream &operator<<(std::ostream &stream, const ShaderCreateInfo &info)
{
/* TODO(@fclem): Complete print. */
auto print_resource = [&](const Resource &res) {
switch (res.bind_type) {
case Resource::BindType::UNIFORM_BUFFER:
stream << "UNIFORM_BUFFER(" << res.slot << ", " << res.uniformbuf.name << ")"
<< std::endl;
break;
case Resource::BindType::STORAGE_BUFFER:
stream << "STORAGE_BUFFER(" << res.slot << ", " << res.storagebuf.name << ")"
<< std::endl;
break;
case Resource::BindType::SAMPLER:
stream << "SAMPLER(" << res.slot << ", " << res.sampler.name << ")" << std::endl;
break;
case Resource::BindType::IMAGE:
stream << "IMAGE(" << res.slot << ", " << res.image.name << ")" << std::endl;
break;
}
};
/* TODO(@fclem): Order the resources. */
for (const auto &res : info.batch_resources_) {
print_resource(res);
}
for (const auto &res : info.pass_resources_) {
print_resource(res);
}
for (const auto &res : info.geometry_resources_) {
print_resource(res);
}
return stream;
}
bool has_resource_type(Resource::BindType bind_type) const
{
for (const auto &res : batch_resources_) {
if (res.bind_type == bind_type) {
return true;
}
}
for (const auto &res : pass_resources_) {
if (res.bind_type == bind_type) {
return true;
}
}
for (const auto &res : geometry_resources_) {
if (res.bind_type == bind_type) {
return true;
}
}
return false;
}
bool has_resource_image() const
{
return has_resource_type(Resource::BindType::IMAGE);
}
/** \} */
# undef TEST_EQUAL
# undef TEST_VECTOR_EQUAL
};
} // namespace blender::gpu::shader
namespace blender {
template<> struct DefaultHash<Vector<blender::gpu::shader::SpecializationConstant::Value>> {
uint64_t operator()(const Vector<blender::gpu::shader::SpecializationConstant::Value> &key) const
{
uint64_t hash = 0;
for (const blender::gpu::shader::SpecializationConstant::Value &value : key) {
hash = hash * 33 ^ uint64_t(value.u);
}
return hash;
}
};
} // namespace blender
#endif
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