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godot/drivers/metal/metal_objects.h

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/**************************************************************************/
/* metal_objects.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
/**************************************************************************/
/* */
/* Portions of this code were derived from MoltenVK. */
/* */
/* Copyright (c) 2015-2023 The Brenwill Workshop Ltd. */
/* (http://www.brenwill.com) */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/**************************************************************************/
#ifndef METAL_OBJECTS_H
#define METAL_OBJECTS_H
#import "metal_device_properties.h"
#import "metal_utils.h"
#import "pixel_formats.h"
#import "servers/rendering/rendering_device_driver.h"
#import <CommonCrypto/CommonDigest.h>
#import <Foundation/Foundation.h>
#import <Metal/Metal.h>
#import <QuartzCore/CAMetalLayer.h>
#import <simd/simd.h>
#import <zlib.h>
#import <initializer_list>
#import <optional>
#import <spirv.hpp>
// These types can be used in Vector and other containers that use
// pointer operations not supported by ARC.
namespace MTL {
#define MTL_CLASS(name) \
class name { \
public: \
name(id<MTL##name> obj = nil) : m_obj(obj) {} \
operator id<MTL##name>() const { return m_obj; } \
id<MTL##name> m_obj; \
};
MTL_CLASS(Texture)
} //namespace MTL
enum ShaderStageUsage : uint32_t {
None = 0,
Vertex = RDD::SHADER_STAGE_VERTEX_BIT,
Fragment = RDD::SHADER_STAGE_FRAGMENT_BIT,
TesselationControl = RDD::SHADER_STAGE_TESSELATION_CONTROL_BIT,
TesselationEvaluation = RDD::SHADER_STAGE_TESSELATION_EVALUATION_BIT,
Compute = RDD::SHADER_STAGE_COMPUTE_BIT,
};
_FORCE_INLINE_ ShaderStageUsage &operator|=(ShaderStageUsage &p_a, int p_b) {
p_a = ShaderStageUsage(uint32_t(p_a) | uint32_t(p_b));
return p_a;
}
enum class MDCommandBufferStateType {
None,
Render,
Compute,
Blit,
};
enum class MDPipelineType {
None,
Render,
Compute,
};
class MDRenderPass;
class MDPipeline;
class MDRenderPipeline;
class MDComputePipeline;
class MDFrameBuffer;
class RenderingDeviceDriverMetal;
class MDUniformSet;
class MDShader;
#pragma mark - Resource Factory
struct ClearAttKey {
const static uint32_t COLOR_COUNT = MAX_COLOR_ATTACHMENT_COUNT;
const static uint32_t DEPTH_INDEX = COLOR_COUNT;
const static uint32_t STENCIL_INDEX = DEPTH_INDEX + 1;
const static uint32_t ATTACHMENT_COUNT = STENCIL_INDEX + 1;
uint16_t sample_count = 0;
uint16_t pixel_formats[ATTACHMENT_COUNT] = { 0 };
_FORCE_INLINE_ void set_color_format(uint32_t p_idx, MTLPixelFormat p_fmt) { pixel_formats[p_idx] = p_fmt; }
_FORCE_INLINE_ void set_depth_format(MTLPixelFormat p_fmt) { pixel_formats[DEPTH_INDEX] = p_fmt; }
_FORCE_INLINE_ void set_stencil_format(MTLPixelFormat p_fmt) { pixel_formats[STENCIL_INDEX] = p_fmt; }
_FORCE_INLINE_ MTLPixelFormat depth_format() const { return (MTLPixelFormat)pixel_formats[DEPTH_INDEX]; }
_FORCE_INLINE_ MTLPixelFormat stencil_format() const { return (MTLPixelFormat)pixel_formats[STENCIL_INDEX]; }
_FORCE_INLINE_ bool is_enabled(uint32_t p_idx) const { return pixel_formats[p_idx] != 0; }
_FORCE_INLINE_ bool is_depth_enabled() const { return pixel_formats[DEPTH_INDEX] != 0; }
_FORCE_INLINE_ bool is_stencil_enabled() const { return pixel_formats[STENCIL_INDEX] != 0; }
_FORCE_INLINE_ bool operator==(const ClearAttKey &p_rhs) const {
return memcmp(this, &p_rhs, sizeof(ClearAttKey)) == 0;
}
uint32_t hash() const {
uint32_t h = hash_murmur3_one_32(sample_count);
h = hash_murmur3_buffer(pixel_formats, ATTACHMENT_COUNT * sizeof(pixel_formats[0]), h);
return h;
}
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDResourceFactory {
private:
RenderingDeviceDriverMetal *device_driver;
id<MTLFunction> new_func(NSString *p_source, NSString *p_name, NSError **p_error);
id<MTLFunction> new_clear_vert_func(ClearAttKey &p_key);
id<MTLFunction> new_clear_frag_func(ClearAttKey &p_key);
NSString *get_format_type_string(MTLPixelFormat p_fmt);
public:
id<MTLRenderPipelineState> new_clear_pipeline_state(ClearAttKey &p_key, NSError **p_error);
id<MTLDepthStencilState> new_depth_stencil_state(bool p_use_depth, bool p_use_stencil);
MDResourceFactory(RenderingDeviceDriverMetal *p_device_driver) :
device_driver(p_device_driver) {}
~MDResourceFactory() = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDResourceCache {
private:
typedef HashMap<ClearAttKey, id<MTLRenderPipelineState>, HashableHasher<ClearAttKey>> HashMap;
std::unique_ptr<MDResourceFactory> resource_factory;
HashMap clear_states;
struct {
id<MTLDepthStencilState> all;
id<MTLDepthStencilState> depth_only;
id<MTLDepthStencilState> stencil_only;
id<MTLDepthStencilState> none;
} clear_depth_stencil_state;
public:
id<MTLRenderPipelineState> get_clear_render_pipeline_state(ClearAttKey &p_key, NSError **p_error);
id<MTLDepthStencilState> get_depth_stencil_state(bool p_use_depth, bool p_use_stencil);
explicit MDResourceCache(RenderingDeviceDriverMetal *p_device_driver) :
resource_factory(new MDResourceFactory(p_device_driver)) {}
~MDResourceCache() = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDCommandBuffer {
private:
RenderingDeviceDriverMetal *device_driver = nullptr;
id<MTLCommandQueue> queue = nil;
id<MTLCommandBuffer> commandBuffer = nil;
void _end_compute_dispatch();
void _end_blit();
#pragma mark - Render
void _render_set_dirty_state();
void _render_bind_uniform_sets();
static void _populate_vertices(simd::float4 *p_vertices, Size2i p_fb_size, VectorView<Rect2i> p_rects);
static uint32_t _populate_vertices(simd::float4 *p_vertices, uint32_t p_index, Rect2i const &p_rect, Size2i p_fb_size);
void _end_render_pass();
void _render_clear_render_area();
public:
MDCommandBufferStateType type = MDCommandBufferStateType::None;
struct RenderState {
MDRenderPass *pass = nullptr;
MDFrameBuffer *frameBuffer = nullptr;
MDRenderPipeline *pipeline = nullptr;
LocalVector<RDD::RenderPassClearValue> clear_values;
LocalVector<MTLViewport> viewports;
LocalVector<MTLScissorRect> scissors;
std::optional<Color> blend_constants;
uint32_t current_subpass = UINT32_MAX;
Rect2i render_area = {};
bool is_rendering_entire_area = false;
MTLRenderPassDescriptor *desc = nil;
id<MTLRenderCommandEncoder> encoder = nil;
id<MTLBuffer> __unsafe_unretained index_buffer = nil; // Buffer is owned by RDD.
MTLIndexType index_type = MTLIndexTypeUInt16;
LocalVector<id<MTLBuffer> __unsafe_unretained> vertex_buffers;
LocalVector<NSUInteger> vertex_offsets;
// clang-format off
enum DirtyFlag: uint8_t {
DIRTY_NONE = 0b0000'0000,
DIRTY_PIPELINE = 0b0000'0001, //! pipeline state
DIRTY_UNIFORMS = 0b0000'0010, //! uniform sets
DIRTY_DEPTH = 0b0000'0100, //! depth / stenci state
DIRTY_VERTEX = 0b0000'1000, //! vertex buffers
DIRTY_VIEWPORT = 0b0001'0000, //! viewport rectangles
DIRTY_SCISSOR = 0b0010'0000, //! scissor rectangles
DIRTY_BLEND = 0b0100'0000, //! blend state
DIRTY_RASTER = 0b1000'0000, //! encoder state like cull mode
DIRTY_ALL = 0xff,
};
// clang-format on
BitField<DirtyFlag> dirty = DIRTY_NONE;
LocalVector<MDUniformSet *> uniform_sets;
// Bit mask of the uniform sets that are dirty, to prevent redundant binding.
uint64_t uniform_set_mask = 0;
_FORCE_INLINE_ void reset() {
pass = nil;
frameBuffer = nil;
pipeline = nil;
current_subpass = UINT32_MAX;
render_area = {};
is_rendering_entire_area = false;
desc = nil;
encoder = nil;
index_buffer = nil;
index_type = MTLIndexTypeUInt16;
dirty = DIRTY_NONE;
uniform_sets.clear();
uniform_set_mask = 0;
clear_values.clear();
viewports.clear();
scissors.clear();
blend_constants.reset();
vertex_buffers.clear();
vertex_offsets.clear();
}
_FORCE_INLINE_ void mark_viewport_dirty() {
if (viewports.is_empty()) {
return;
}
dirty.set_flag(DirtyFlag::DIRTY_VIEWPORT);
}
_FORCE_INLINE_ void mark_scissors_dirty() {
if (scissors.is_empty()) {
return;
}
dirty.set_flag(DirtyFlag::DIRTY_SCISSOR);
}
_FORCE_INLINE_ void mark_vertex_dirty() {
if (vertex_buffers.is_empty()) {
return;
}
dirty.set_flag(DirtyFlag::DIRTY_VERTEX);
}
_FORCE_INLINE_ void mark_uniforms_dirty(std::initializer_list<uint32_t> l) {
if (uniform_sets.is_empty()) {
return;
}
for (uint32_t i : l) {
if (i < uniform_sets.size() && uniform_sets[i] != nullptr) {
uniform_set_mask |= 1 << i;
}
}
dirty.set_flag(DirtyFlag::DIRTY_UNIFORMS);
}
_FORCE_INLINE_ void mark_uniforms_dirty(void) {
if (uniform_sets.is_empty()) {
return;
}
for (uint32_t i = 0; i < uniform_sets.size(); i++) {
if (uniform_sets[i] != nullptr) {
uniform_set_mask |= 1 << i;
}
}
dirty.set_flag(DirtyFlag::DIRTY_UNIFORMS);
}
MTLScissorRect clip_to_render_area(MTLScissorRect p_rect) const {
uint32_t raLeft = render_area.position.x;
uint32_t raRight = raLeft + render_area.size.width;
uint32_t raBottom = render_area.position.y;
uint32_t raTop = raBottom + render_area.size.height;
p_rect.x = CLAMP(p_rect.x, raLeft, MAX(raRight - 1, raLeft));
p_rect.y = CLAMP(p_rect.y, raBottom, MAX(raTop - 1, raBottom));
p_rect.width = MIN(p_rect.width, raRight - p_rect.x);
p_rect.height = MIN(p_rect.height, raTop - p_rect.y);
return p_rect;
}
Rect2i clip_to_render_area(Rect2i p_rect) const {
int32_t raLeft = render_area.position.x;
int32_t raRight = raLeft + render_area.size.width;
int32_t raBottom = render_area.position.y;
int32_t raTop = raBottom + render_area.size.height;
p_rect.position.x = CLAMP(p_rect.position.x, raLeft, MAX(raRight - 1, raLeft));
p_rect.position.y = CLAMP(p_rect.position.y, raBottom, MAX(raTop - 1, raBottom));
p_rect.size.width = MIN(p_rect.size.width, raRight - p_rect.position.x);
p_rect.size.height = MIN(p_rect.size.height, raTop - p_rect.position.y);
return p_rect;
}
} render;
// State specific for a compute pass.
struct {
MDComputePipeline *pipeline = nullptr;
id<MTLComputeCommandEncoder> encoder = nil;
_FORCE_INLINE_ void reset() {
pipeline = nil;
encoder = nil;
}
} compute;
// State specific to a blit pass.
struct {
id<MTLBlitCommandEncoder> encoder = nil;
_FORCE_INLINE_ void reset() {
encoder = nil;
}
} blit;
_FORCE_INLINE_ id<MTLCommandBuffer> get_command_buffer() const {
return commandBuffer;
}
void begin();
void commit();
void end();
id<MTLBlitCommandEncoder> blit_command_encoder();
void encodeRenderCommandEncoderWithDescriptor(MTLRenderPassDescriptor *p_desc, NSString *p_label);
void bind_pipeline(RDD::PipelineID p_pipeline);
#pragma mark - Render Commands
void render_bind_uniform_set(RDD::UniformSetID p_uniform_set, RDD::ShaderID p_shader, uint32_t p_set_index);
void render_clear_attachments(VectorView<RDD::AttachmentClear> p_attachment_clears, VectorView<Rect2i> p_rects);
void render_set_viewport(VectorView<Rect2i> p_viewports);
void render_set_scissor(VectorView<Rect2i> p_scissors);
void render_set_blend_constants(const Color &p_constants);
void render_begin_pass(RDD::RenderPassID p_render_pass,
RDD::FramebufferID p_frameBuffer,
RDD::CommandBufferType p_cmd_buffer_type,
const Rect2i &p_rect,
VectorView<RDD::RenderPassClearValue> p_clear_values);
void render_next_subpass();
void render_draw(uint32_t p_vertex_count,
uint32_t p_instance_count,
uint32_t p_base_vertex,
uint32_t p_first_instance);
void render_bind_vertex_buffers(uint32_t p_binding_count, const RDD::BufferID *p_buffers, const uint64_t *p_offsets);
void render_bind_index_buffer(RDD::BufferID p_buffer, RDD::IndexBufferFormat p_format, uint64_t p_offset);
void render_draw_indexed(uint32_t p_index_count,
uint32_t p_instance_count,
uint32_t p_first_index,
int32_t p_vertex_offset,
uint32_t p_first_instance);
void render_draw_indexed_indirect(RDD::BufferID p_indirect_buffer, uint64_t p_offset, uint32_t p_draw_count, uint32_t p_stride);
void render_draw_indexed_indirect_count(RDD::BufferID p_indirect_buffer, uint64_t p_offset, RDD::BufferID p_count_buffer, uint64_t p_count_buffer_offset, uint32_t p_max_draw_count, uint32_t p_stride);
void render_draw_indirect(RDD::BufferID p_indirect_buffer, uint64_t p_offset, uint32_t p_draw_count, uint32_t p_stride);
void render_draw_indirect_count(RDD::BufferID p_indirect_buffer, uint64_t p_offset, RDD::BufferID p_count_buffer, uint64_t p_count_buffer_offset, uint32_t p_max_draw_count, uint32_t p_stride);
void render_end_pass();
#pragma mark - Compute Commands
void compute_bind_uniform_set(RDD::UniformSetID p_uniform_set, RDD::ShaderID p_shader, uint32_t p_set_index);
void compute_dispatch(uint32_t p_x_groups, uint32_t p_y_groups, uint32_t p_z_groups);
void compute_dispatch_indirect(RDD::BufferID p_indirect_buffer, uint64_t p_offset);
MDCommandBuffer(id<MTLCommandQueue> p_queue, RenderingDeviceDriverMetal *p_device_driver) :
device_driver(p_device_driver), queue(p_queue) {
type = MDCommandBufferStateType::None;
}
MDCommandBuffer() = default;
};
#if (TARGET_OS_OSX && __MAC_OS_X_VERSION_MAX_ALLOWED < 140000) || (TARGET_OS_IOS && __IPHONE_OS_VERSION_MAX_ALLOWED < 170000)
#define MTLBindingAccess MTLArgumentAccess
#define MTLBindingAccessReadOnly MTLArgumentAccessReadOnly
#define MTLBindingAccessReadWrite MTLArgumentAccessReadWrite
#define MTLBindingAccessWriteOnly MTLArgumentAccessWriteOnly
#endif
struct API_AVAILABLE(macos(11.0), ios(14.0)) BindingInfo {
MTLDataType dataType = MTLDataTypeNone;
uint32_t index = 0;
MTLBindingAccess access = MTLBindingAccessReadOnly;
MTLResourceUsage usage = 0;
MTLTextureType textureType = MTLTextureType2D;
spv::ImageFormat imageFormat = spv::ImageFormatUnknown;
uint32_t arrayLength = 0;
bool isMultisampled = false;
inline MTLArgumentDescriptor *new_argument_descriptor() const {
MTLArgumentDescriptor *desc = MTLArgumentDescriptor.argumentDescriptor;
desc.dataType = dataType;
desc.index = index;
desc.access = access;
desc.textureType = textureType;
desc.arrayLength = arrayLength;
return desc;
}
size_t serialize_size() const {
return sizeof(uint32_t) * 8 /* 8 uint32_t fields */;
}
template <typename W>
void serialize(W &p_writer) const {
p_writer.write((uint32_t)dataType);
p_writer.write(index);
p_writer.write((uint32_t)access);
p_writer.write((uint32_t)usage);
p_writer.write((uint32_t)textureType);
p_writer.write(imageFormat);
p_writer.write(arrayLength);
p_writer.write(isMultisampled);
}
template <typename R>
void deserialize(R &p_reader) {
p_reader.read((uint32_t &)dataType);
p_reader.read(index);
p_reader.read((uint32_t &)access);
p_reader.read((uint32_t &)usage);
p_reader.read((uint32_t &)textureType);
p_reader.read((uint32_t &)imageFormat);
p_reader.read(arrayLength);
p_reader.read(isMultisampled);
}
};
using RDC = RenderingDeviceCommons;
typedef API_AVAILABLE(macos(11.0), ios(14.0)) HashMap<RDC::ShaderStage, BindingInfo> BindingInfoMap;
struct API_AVAILABLE(macos(11.0), ios(14.0)) UniformInfo {
uint32_t binding;
ShaderStageUsage active_stages = None;
BindingInfoMap bindings;
BindingInfoMap bindings_secondary;
};
struct API_AVAILABLE(macos(11.0), ios(14.0)) UniformSet {
LocalVector<UniformInfo> uniforms;
uint32_t buffer_size = 0;
HashMap<RDC::ShaderStage, uint32_t> offsets;
HashMap<RDC::ShaderStage, id<MTLArgumentEncoder>> encoders;
};
struct ShaderCacheEntry;
enum class ShaderLoadStrategy {
DEFAULT,
LAZY,
};
/// A Metal shader library.
@interface MDLibrary : NSObject {
ShaderCacheEntry *_entry;
};
- (id<MTLLibrary>)library;
- (NSError *)error;
- (void)setLabel:(NSString *)label;
+ (instancetype)newLibraryWithCacheEntry:(ShaderCacheEntry *)entry
device:(id<MTLDevice>)device
source:(NSString *)source
options:(MTLCompileOptions *)options
strategy:(ShaderLoadStrategy)strategy;
@end
struct SHA256Digest {
unsigned char data[CC_SHA256_DIGEST_LENGTH];
uint32_t hash() const {
uint32_t c = crc32(0, data, CC_SHA256_DIGEST_LENGTH);
return c;
}
SHA256Digest() {
bzero(data, CC_SHA256_DIGEST_LENGTH);
}
SHA256Digest(const char *p_data, size_t p_length) {
CC_SHA256(p_data, (CC_LONG)p_length, data);
}
_FORCE_INLINE_ uint32_t short_sha() const {
return __builtin_bswap32(*(uint32_t *)&data[0]);
}
};
template <>
struct HashMapComparatorDefault<SHA256Digest> {
static bool compare(const SHA256Digest &p_lhs, const SHA256Digest &p_rhs) {
return memcmp(p_lhs.data, p_rhs.data, CC_SHA256_DIGEST_LENGTH) == 0;
}
};
/// A cache entry for a Metal shader library.
struct ShaderCacheEntry {
RenderingDeviceDriverMetal &owner;
/// A hash of the Metal shader source code.
SHA256Digest key;
CharString name;
RD::ShaderStage stage = RD::SHADER_STAGE_VERTEX;
/// This reference must be weak, to ensure that when the last strong reference to the library
/// is released, the cache entry is freed.
MDLibrary *__weak library = nil;
/// Notify the cache that this entry is no longer needed.
void notify_free() const;
ShaderCacheEntry(RenderingDeviceDriverMetal &p_owner, SHA256Digest p_key) :
owner(p_owner), key(p_key) {
}
~ShaderCacheEntry() = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDShader {
public:
CharString name;
Vector<UniformSet> sets;
virtual void encode_push_constant_data(VectorView<uint32_t> p_data, MDCommandBuffer *p_cb) = 0;
MDShader(CharString p_name, Vector<UniformSet> p_sets) :
name(p_name), sets(p_sets) {}
virtual ~MDShader() = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDComputeShader final : public MDShader {
public:
struct {
uint32_t binding = -1;
uint32_t size = 0;
} push_constants;
MTLSize local = {};
MDLibrary *kernel;
#if DEV_ENABLED
CharString kernel_source;
#endif
void encode_push_constant_data(VectorView<uint32_t> p_data, MDCommandBuffer *p_cb) final;
MDComputeShader(CharString p_name, Vector<UniformSet> p_sets, MDLibrary *p_kernel);
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDRenderShader final : public MDShader {
public:
struct {
struct {
int32_t binding = -1;
uint32_t size = 0;
} vert;
struct {
int32_t binding = -1;
uint32_t size = 0;
} frag;
} push_constants;
MDLibrary *vert;
MDLibrary *frag;
#if DEV_ENABLED
CharString vert_source;
CharString frag_source;
#endif
void encode_push_constant_data(VectorView<uint32_t> p_data, MDCommandBuffer *p_cb) final;
MDRenderShader(CharString p_name, Vector<UniformSet> p_sets, MDLibrary *p_vert, MDLibrary *p_frag);
};
enum StageResourceUsage : uint32_t {
VertexRead = (MTLResourceUsageRead << RDD::SHADER_STAGE_VERTEX * 2),
VertexWrite = (MTLResourceUsageWrite << RDD::SHADER_STAGE_VERTEX * 2),
FragmentRead = (MTLResourceUsageRead << RDD::SHADER_STAGE_FRAGMENT * 2),
FragmentWrite = (MTLResourceUsageWrite << RDD::SHADER_STAGE_FRAGMENT * 2),
TesselationControlRead = (MTLResourceUsageRead << RDD::SHADER_STAGE_TESSELATION_CONTROL * 2),
TesselationControlWrite = (MTLResourceUsageWrite << RDD::SHADER_STAGE_TESSELATION_CONTROL * 2),
TesselationEvaluationRead = (MTLResourceUsageRead << RDD::SHADER_STAGE_TESSELATION_EVALUATION * 2),
TesselationEvaluationWrite = (MTLResourceUsageWrite << RDD::SHADER_STAGE_TESSELATION_EVALUATION * 2),
ComputeRead = (MTLResourceUsageRead << RDD::SHADER_STAGE_COMPUTE * 2),
ComputeWrite = (MTLResourceUsageWrite << RDD::SHADER_STAGE_COMPUTE * 2),
};
_FORCE_INLINE_ StageResourceUsage &operator|=(StageResourceUsage &p_a, uint32_t p_b) {
p_a = StageResourceUsage(uint32_t(p_a) | p_b);
return p_a;
}
_FORCE_INLINE_ StageResourceUsage stage_resource_usage(RDC::ShaderStage p_stage, MTLResourceUsage p_usage) {
return StageResourceUsage(p_usage << (p_stage * 2));
}
_FORCE_INLINE_ MTLResourceUsage resource_usage_for_stage(StageResourceUsage p_usage, RDC::ShaderStage p_stage) {
return MTLResourceUsage((p_usage >> (p_stage * 2)) & 0b11);
}
template <>
struct HashMapComparatorDefault<RDD::ShaderID> {
static bool compare(const RDD::ShaderID &p_lhs, const RDD::ShaderID &p_rhs) {
return p_lhs.id == p_rhs.id;
}
};
struct BoundUniformSet {
id<MTLBuffer> buffer;
HashMap<id<MTLResource>, StageResourceUsage> bound_resources;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDUniformSet {
public:
uint32_t index;
LocalVector<RDD::BoundUniform> uniforms;
HashMap<MDShader *, BoundUniformSet> bound_uniforms;
BoundUniformSet &boundUniformSetForShader(MDShader *p_shader, id<MTLDevice> p_device);
};
enum class MDAttachmentType : uint8_t {
None = 0,
Color = 1 << 0,
Depth = 1 << 1,
Stencil = 1 << 2,
};
_FORCE_INLINE_ MDAttachmentType &operator|=(MDAttachmentType &p_a, MDAttachmentType p_b) {
flags::set(p_a, p_b);
return p_a;
}
_FORCE_INLINE_ bool operator&(MDAttachmentType p_a, MDAttachmentType p_b) {
return uint8_t(p_a) & uint8_t(p_b);
}
struct MDSubpass {
uint32_t subpass_index = 0;
LocalVector<RDD::AttachmentReference> input_references;
LocalVector<RDD::AttachmentReference> color_references;
RDD::AttachmentReference depth_stencil_reference;
LocalVector<RDD::AttachmentReference> resolve_references;
MTLFmtCaps getRequiredFmtCapsForAttachmentAt(uint32_t p_index) const;
};
struct API_AVAILABLE(macos(11.0), ios(14.0)) MDAttachment {
private:
uint32_t index = 0;
uint32_t firstUseSubpassIndex = 0;
uint32_t lastUseSubpassIndex = 0;
public:
MTLPixelFormat format = MTLPixelFormatInvalid;
MDAttachmentType type = MDAttachmentType::None;
MTLLoadAction loadAction = MTLLoadActionDontCare;
MTLStoreAction storeAction = MTLStoreActionDontCare;
MTLLoadAction stencilLoadAction = MTLLoadActionDontCare;
MTLStoreAction stencilStoreAction = MTLStoreActionDontCare;
uint32_t samples = 1;
/*!
* @brief Returns true if this attachment is first used in the given subpass.
* @param p_subpass
* @return
*/
_FORCE_INLINE_ bool isFirstUseOf(MDSubpass const &p_subpass) const {
return p_subpass.subpass_index == firstUseSubpassIndex;
}
/*!
* @brief Returns true if this attachment is last used in the given subpass.
* @param p_subpass
* @return
*/
_FORCE_INLINE_ bool isLastUseOf(MDSubpass const &p_subpass) const {
return p_subpass.subpass_index == lastUseSubpassIndex;
}
void linkToSubpass(MDRenderPass const &p_pass);
MTLStoreAction getMTLStoreAction(MDSubpass const &p_subpass,
bool p_is_rendering_entire_area,
bool p_has_resolve,
bool p_can_resolve,
bool p_is_stencil) const;
bool configureDescriptor(MTLRenderPassAttachmentDescriptor *p_desc,
PixelFormats &p_pf,
MDSubpass const &p_subpass,
id<MTLTexture> p_attachment,
bool p_is_rendering_entire_area,
bool p_has_resolve,
bool p_can_resolve,
bool p_is_stencil) const;
/** Returns whether this attachment should be cleared in the subpass. */
bool shouldClear(MDSubpass const &p_subpass, bool p_is_stencil) const;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDRenderPass {
public:
Vector<MDAttachment> attachments;
Vector<MDSubpass> subpasses;
uint32_t get_sample_count() const {
return attachments.is_empty() ? 1 : attachments[0].samples;
}
MDRenderPass(Vector<MDAttachment> &p_attachments, Vector<MDSubpass> &p_subpasses);
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDPipeline {
public:
MDPipelineType type;
explicit MDPipeline(MDPipelineType p_type) :
type(p_type) {}
virtual ~MDPipeline() = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDRenderPipeline final : public MDPipeline {
public:
id<MTLRenderPipelineState> state = nil;
id<MTLDepthStencilState> depth_stencil = nil;
uint32_t push_constant_size = 0;
uint32_t push_constant_stages_mask = 0;
SampleCount sample_count = SampleCount1;
struct {
MTLCullMode cull_mode = MTLCullModeNone;
MTLTriangleFillMode fill_mode = MTLTriangleFillModeFill;
MTLDepthClipMode clip_mode = MTLDepthClipModeClip;
MTLWinding winding = MTLWindingClockwise;
MTLPrimitiveType render_primitive = MTLPrimitiveTypePoint;
struct {
bool enabled = false;
} depth_test;
struct {
bool enabled = false;
float depth_bias = 0.0;
float slope_scale = 0.0;
float clamp = 0.0;
_FORCE_INLINE_ void apply(id<MTLRenderCommandEncoder> __unsafe_unretained p_enc) const {
if (!enabled) {
return;
}
[p_enc setDepthBias:depth_bias slopeScale:slope_scale clamp:clamp];
}
} depth_bias;
struct {
bool enabled = false;
uint32_t front_reference = 0;
uint32_t back_reference = 0;
_FORCE_INLINE_ void apply(id<MTLRenderCommandEncoder> __unsafe_unretained p_enc) const {
if (!enabled)
return;
[p_enc setStencilFrontReferenceValue:front_reference backReferenceValue:back_reference];
};
} stencil;
struct {
bool enabled = false;
float r = 0.0;
float g = 0.0;
float b = 0.0;
float a = 0.0;
_FORCE_INLINE_ void apply(id<MTLRenderCommandEncoder> __unsafe_unretained p_enc) const {
//if (!enabled)
// return;
[p_enc setBlendColorRed:r green:g blue:b alpha:a];
};
} blend;
_FORCE_INLINE_ void apply(id<MTLRenderCommandEncoder> __unsafe_unretained p_enc) const {
[p_enc setCullMode:cull_mode];
[p_enc setTriangleFillMode:fill_mode];
[p_enc setDepthClipMode:clip_mode];
[p_enc setFrontFacingWinding:winding];
depth_bias.apply(p_enc);
stencil.apply(p_enc);
blend.apply(p_enc);
}
} raster_state;
MDRenderShader *shader = nil;
MDRenderPipeline() :
MDPipeline(MDPipelineType::Render) {}
~MDRenderPipeline() final = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDComputePipeline final : public MDPipeline {
public:
id<MTLComputePipelineState> state = nil;
struct {
MTLSize local = {};
} compute_state;
MDComputeShader *shader = nil;
explicit MDComputePipeline(id<MTLComputePipelineState> p_state) :
MDPipeline(MDPipelineType::Compute), state(p_state) {}
~MDComputePipeline() final = default;
};
class API_AVAILABLE(macos(11.0), ios(14.0)) MDFrameBuffer {
public:
Vector<MTL::Texture> textures;
Size2i size;
MDFrameBuffer(Vector<MTL::Texture> p_textures, Size2i p_size) :
textures(p_textures), size(p_size) {}
MDFrameBuffer() {}
virtual ~MDFrameBuffer() = default;
};
// These functions are used to convert between Objective-C objects and
// the RIDs used by Godot, respecting automatic reference counting.
namespace rid {
// Converts an Objective-C object to a pointer, and incrementing the
// reference count.
_FORCE_INLINE_
void *owned(id p_id) {
return (__bridge_retained void *)p_id;
}
#define MAKE_ID(FROM, TO) \
_FORCE_INLINE_ TO make(FROM p_obj) { return TO(owned(p_obj)); }
MAKE_ID(id<MTLTexture>, RDD::TextureID)
MAKE_ID(id<MTLBuffer>, RDD::BufferID)
MAKE_ID(id<MTLSamplerState>, RDD::SamplerID)
MAKE_ID(MTLVertexDescriptor *, RDD::VertexFormatID)
MAKE_ID(id<MTLCommandQueue>, RDD::CommandPoolID)
// Converts a pointer to an Objective-C object without changing the reference count.
_FORCE_INLINE_
auto get(RDD::ID p_id) {
return (p_id.id) ? (__bridge ::id)(void *)p_id.id : nil;
}
// Converts a pointer to an Objective-C object, and decrements the reference count.
_FORCE_INLINE_
auto release(RDD::ID p_id) {
return (__bridge_transfer ::id)(void *)p_id.id;
}
} // namespace rid
#endif // METAL_OBJECTS_H
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