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noahbackus
2025-09-16 20:46:46 -04:00
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drivers/metal/pixel_formats.h Normal file
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/**************************************************************************/
/* pixel_formats.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. */
/**************************************************************************/
#pragma once
/**************************************************************************/
/* */
/* 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. */
/**************************************************************************/
#include "core/typedefs.h"
GODOT_CLANG_WARNING_PUSH_AND_IGNORE("-Wdeprecated-declarations")
#import "inflection_map.h"
#import "metal_device_properties.h"
#include "servers/rendering/rendering_device.h"
#import <Metal/Metal.h>
#pragma mark -
#pragma mark Metal format capabilities
typedef enum : uint16_t {
kMTLFmtCapsNone = 0,
/*! The format can be used in a shader read operation. */
kMTLFmtCapsRead = (1 << 0),
/*! The format can be used in a shader filter operation during sampling. */
kMTLFmtCapsFilter = (1 << 1),
/*! The format can be used in a shader write operation. */
kMTLFmtCapsWrite = (1 << 2),
/*! The format can be used with atomic operations. */
kMTLFmtCapsAtomic = (1 << 3),
/*! The format can be used as a color attachment. */
kMTLFmtCapsColorAtt = (1 << 4),
/*! The format can be used as a depth-stencil attachment. */
kMTLFmtCapsDSAtt = (1 << 5),
/*! The format can be used with blend operations. */
kMTLFmtCapsBlend = (1 << 6),
/*! The format can be used as a destination for multisample antialias (MSAA) data. */
kMTLFmtCapsMSAA = (1 << 7),
/*! The format can be used as a resolve attachment. */
kMTLFmtCapsResolve = (1 << 8),
kMTLFmtCapsVertex = (1 << 9),
kMTLFmtCapsRF = (kMTLFmtCapsRead | kMTLFmtCapsFilter),
kMTLFmtCapsRC = (kMTLFmtCapsRead | kMTLFmtCapsColorAtt),
kMTLFmtCapsRCB = (kMTLFmtCapsRC | kMTLFmtCapsBlend),
kMTLFmtCapsRCM = (kMTLFmtCapsRC | kMTLFmtCapsMSAA),
kMTLFmtCapsRCMB = (kMTLFmtCapsRCM | kMTLFmtCapsBlend),
kMTLFmtCapsRWC = (kMTLFmtCapsRC | kMTLFmtCapsWrite),
kMTLFmtCapsRWCB = (kMTLFmtCapsRWC | kMTLFmtCapsBlend),
kMTLFmtCapsRWCM = (kMTLFmtCapsRWC | kMTLFmtCapsMSAA),
kMTLFmtCapsRWCMB = (kMTLFmtCapsRWCM | kMTLFmtCapsBlend),
kMTLFmtCapsRFCMRB = (kMTLFmtCapsRCMB | kMTLFmtCapsFilter | kMTLFmtCapsResolve),
kMTLFmtCapsRFWCMB = (kMTLFmtCapsRWCMB | kMTLFmtCapsFilter),
kMTLFmtCapsAll = (kMTLFmtCapsRFWCMB | kMTLFmtCapsResolve),
kMTLFmtCapsDRM = (kMTLFmtCapsDSAtt | kMTLFmtCapsRead | kMTLFmtCapsMSAA),
kMTLFmtCapsDRFM = (kMTLFmtCapsDRM | kMTLFmtCapsFilter),
kMTLFmtCapsDRMR = (kMTLFmtCapsDRM | kMTLFmtCapsResolve),
kMTLFmtCapsDRFMR = (kMTLFmtCapsDRFM | kMTLFmtCapsResolve),
kMTLFmtCapsChromaSubsampling = kMTLFmtCapsRF,
kMTLFmtCapsMultiPlanar = kMTLFmtCapsChromaSubsampling,
} MTLFmtCaps;
inline MTLFmtCaps operator|(MTLFmtCaps p_left, MTLFmtCaps p_right) {
return static_cast<MTLFmtCaps>(static_cast<uint32_t>(p_left) | p_right);
}
inline MTLFmtCaps &operator|=(MTLFmtCaps &p_left, MTLFmtCaps p_right) {
return (p_left = p_left | p_right);
}
#pragma mark -
#pragma mark Metal view classes
enum class MTLViewClass : uint8_t {
None,
Color8,
Color16,
Color32,
Color64,
Color128,
PVRTC_RGB_2BPP,
PVRTC_RGB_4BPP,
PVRTC_RGBA_2BPP,
PVRTC_RGBA_4BPP,
EAC_R11,
EAC_RG11,
EAC_RGBA8,
ETC2_RGB8,
ETC2_RGB8A1,
ASTC_4x4,
ASTC_5x4,
ASTC_5x5,
ASTC_6x5,
ASTC_6x6,
ASTC_8x5,
ASTC_8x6,
ASTC_8x8,
ASTC_10x5,
ASTC_10x6,
ASTC_10x8,
ASTC_10x10,
ASTC_12x10,
ASTC_12x12,
BC1_RGBA,
BC2_RGBA,
BC3_RGBA,
BC4_R,
BC5_RG,
BC6H_RGB,
BC7_RGBA,
Depth24_Stencil8,
Depth32_Stencil8,
BGRA10_XR,
BGR10_XR
};
#pragma mark -
#pragma mark Format descriptors
/** Enumerates the data type of a format. */
enum class MTLFormatType {
None, /**< Format type is unknown. */
ColorHalf, /**< A 16-bit floating point color. */
ColorFloat, /**< A 32-bit floating point color. */
ColorInt8, /**< A signed 8-bit integer color. */
ColorUInt8, /**< An unsigned 8-bit integer color. */
ColorInt16, /**< A signed 16-bit integer color. */
ColorUInt16, /**< An unsigned 16-bit integer color. */
ColorInt32, /**< A signed 32-bit integer color. */
ColorUInt32, /**< An unsigned 32-bit integer color. */
DepthStencil, /**< A depth and stencil value. */
Compressed, /**< A block-compressed color. */
};
struct Extent2D {
uint32_t width;
uint32_t height;
};
struct ComponentMapping {
RD::TextureSwizzle r = RD::TEXTURE_SWIZZLE_IDENTITY;
RD::TextureSwizzle g = RD::TEXTURE_SWIZZLE_IDENTITY;
RD::TextureSwizzle b = RD::TEXTURE_SWIZZLE_IDENTITY;
RD::TextureSwizzle a = RD::TEXTURE_SWIZZLE_IDENTITY;
};
/** Describes the properties of a DataFormat, including the corresponding Metal pixel and vertex format. */
struct DataFormatDesc {
RD::DataFormat dataFormat;
MTLPixelFormat mtlPixelFormat;
MTLPixelFormat mtlPixelFormatSubstitute;
MTLVertexFormat mtlVertexFormat;
MTLVertexFormat mtlVertexFormatSubstitute;
uint8_t chromaSubsamplingPlaneCount;
uint8_t chromaSubsamplingComponentBits;
Extent2D blockTexelSize;
uint32_t bytesPerBlock;
MTLFormatType formatType;
ComponentMapping componentMapping;
const char *name;
bool hasReportedSubstitution;
inline double bytesPerTexel() const { return (double)bytesPerBlock / (double)(blockTexelSize.width * blockTexelSize.height); }
inline bool isSupported() const { return (mtlPixelFormat != MTLPixelFormatInvalid || chromaSubsamplingPlaneCount > 1); }
inline bool isSupportedOrSubstitutable() const { return isSupported() || (mtlPixelFormatSubstitute != MTLPixelFormatInvalid); }
inline bool vertexIsSupported() const { return (mtlVertexFormat != MTLVertexFormatInvalid); }
inline bool vertexIsSupportedOrSubstitutable() const { return vertexIsSupported() || (mtlVertexFormatSubstitute != MTLVertexFormatInvalid); }
bool needsSwizzle() const {
return (componentMapping.r != RD::TEXTURE_SWIZZLE_IDENTITY ||
componentMapping.g != RD::TEXTURE_SWIZZLE_IDENTITY ||
componentMapping.b != RD::TEXTURE_SWIZZLE_IDENTITY ||
componentMapping.a != RD::TEXTURE_SWIZZLE_IDENTITY);
}
};
/** Describes the properties of a MTLPixelFormat or MTLVertexFormat. */
struct MTLFormatDesc {
union {
MTLPixelFormat mtlPixelFormat;
MTLVertexFormat mtlVertexFormat;
};
RD::DataFormat dataFormat = RD::DATA_FORMAT_MAX;
MTLFmtCaps mtlFmtCaps;
MTLViewClass mtlViewClass;
MTLPixelFormat mtlPixelFormatLinear;
const char *name = nullptr;
inline bool isSupported() const { return (mtlPixelFormat != MTLPixelFormatInvalid) && (mtlFmtCaps != kMTLFmtCapsNone); }
};
class API_AVAILABLE(macos(11.0), ios(14.0), tvos(14.0)) PixelFormats {
using DataFormat = RD::DataFormat;
public:
/** Returns whether the DataFormat is supported by the GPU bound to this instance. */
bool isSupported(DataFormat p_format);
/** Returns whether the DataFormat is supported by this implementation, or can be substituted by one that is. */
bool isSupportedOrSubstitutable(DataFormat p_format);
/** Returns whether the specified Metal MTLPixelFormat can be used as a depth format. */
_FORCE_INLINE_ bool isDepthFormat(MTLPixelFormat p_format) {
switch (p_format) {
case MTLPixelFormatDepth32Float:
case MTLPixelFormatDepth16Unorm:
case MTLPixelFormatDepth32Float_Stencil8:
#if TARGET_OS_OSX
case MTLPixelFormatDepth24Unorm_Stencil8:
#endif
return true;
default:
return false;
}
}
/** Returns whether the specified Metal MTLPixelFormat can be used as a stencil format. */
_FORCE_INLINE_ bool isStencilFormat(MTLPixelFormat p_format) {
switch (p_format) {
case MTLPixelFormatStencil8:
#if TARGET_OS_OSX
case MTLPixelFormatDepth24Unorm_Stencil8:
case MTLPixelFormatX24_Stencil8:
#endif
case MTLPixelFormatDepth32Float_Stencil8:
case MTLPixelFormatX32_Stencil8:
return true;
default:
return false;
}
}
/** Returns whether the specified Metal MTLPixelFormat is a PVRTC format. */
bool isPVRTCFormat(MTLPixelFormat p_format);
/** Returns the format type corresponding to the specified Godot pixel format, */
MTLFormatType getFormatType(DataFormat p_format);
/** Returns the format type corresponding to the specified Metal MTLPixelFormat, */
MTLFormatType getFormatType(MTLPixelFormat p_format);
/**
* Returns the Metal MTLPixelFormat corresponding to the specified Godot pixel
* or returns MTLPixelFormatInvalid if no corresponding MTLPixelFormat exists.
*/
MTLPixelFormat getMTLPixelFormat(DataFormat p_format);
/**
* Returns the DataFormat corresponding to the specified Metal MTLPixelFormat,
* or returns DATA_FORMAT_MAX if no corresponding DataFormat exists.
*/
DataFormat getDataFormat(MTLPixelFormat p_format);
/**
* Returns the size, in bytes, of a texel block of the specified Godot pixel.
* For uncompressed formats, the returned value corresponds to the size in bytes of a single texel.
*/
uint32_t getBytesPerBlock(DataFormat p_format);
/**
* Returns the size, in bytes, of a texel block of the specified Metal format.
* For uncompressed formats, the returned value corresponds to the size in bytes of a single texel.
*/
uint32_t getBytesPerBlock(MTLPixelFormat p_format);
/** Returns the number of planes of the specified chroma-subsampling (YCbCr) DataFormat */
uint8_t getChromaSubsamplingPlaneCount(DataFormat p_format);
/** Returns the number of bits per channel of the specified chroma-subsampling (YCbCr) DataFormat */
uint8_t getChromaSubsamplingComponentBits(DataFormat p_format);
/**
* Returns the size, in bytes, of a texel of the specified Godot format.
* The returned value may be fractional for certain compressed formats.
*/
float getBytesPerTexel(DataFormat p_format);
/**
* Returns the size, in bytes, of a texel of the specified Metal format.
* The returned value may be fractional for certain compressed formats.
*/
float getBytesPerTexel(MTLPixelFormat p_format);
/**
* Returns the size, in bytes, of a row of texels of the specified Godot pixel format.
*
* For compressed formats, this takes into consideration the compression block size,
* and p_texels_per_row should specify the width in texels, not blocks. The result is rounded
* up if p_texels_per_row is not an integer multiple of the compression block width.
*/
size_t getBytesPerRow(DataFormat p_format, uint32_t p_texels_per_row);
/**
* Returns the size, in bytes, of a row of texels of the specified Metal format.
*
* For compressed formats, this takes into consideration the compression block size,
* and texelsPerRow should specify the width in texels, not blocks. The result is rounded
* up if texelsPerRow is not an integer multiple of the compression block width.
*/
size_t getBytesPerRow(MTLPixelFormat p_format, uint32_t p_texels_per_row);
/**
* Returns the size, in bytes, of a texture layer of the specified Godot pixel format.
*
* For compressed formats, this takes into consideration the compression block size,
* and p_texel_rows_per_layer should specify the height in texels, not blocks. The result is
* rounded up if p_texel_rows_per_layer is not an integer multiple of the compression block height.
*/
size_t getBytesPerLayer(DataFormat p_format, size_t p_bytes_per_row, uint32_t p_texel_rows_per_layer);
/**
* Returns the size, in bytes, of a texture layer of the specified Metal format.
* For compressed formats, this takes into consideration the compression block size,
* and p_texel_rows_per_layer should specify the height in texels, not blocks. The result is
* rounded up if p_texel_rows_per_layer is not an integer multiple of the compression block height.
*/
size_t getBytesPerLayer(MTLPixelFormat p_format, size_t p_bytes_per_row, uint32_t p_texel_rows_per_layer);
/** Returns whether or not the specified Godot format requires swizzling to use with Metal. */
bool needsSwizzle(DataFormat p_format);
/** Returns the Metal format capabilities supported by the specified Godot format, without substitution. */
MTLFmtCaps getCapabilities(DataFormat p_format, bool p_extended = false);
/** Returns the Metal format capabilities supported by the specified Metal format. */
MTLFmtCaps getCapabilities(MTLPixelFormat p_format, bool p_extended = false);
/**
* Returns the Metal MTLVertexFormat corresponding to the specified
* DataFormat as used as a vertex attribute format.
*/
MTLVertexFormat getMTLVertexFormat(DataFormat p_format);
#pragma mark Construction
explicit PixelFormats(id<MTLDevice> p_device, const MetalFeatures &p_feat);
protected:
DataFormatDesc &getDataFormatDesc(DataFormat p_format);
DataFormatDesc &getDataFormatDesc(MTLPixelFormat p_format);
MTLFormatDesc &getMTLPixelFormatDesc(MTLPixelFormat p_format);
MTLFmtCaps &getMTLPixelFormatCapsIf(MTLPixelFormat mtlPixFmt, bool cond);
MTLFormatDesc &getMTLVertexFormatDesc(MTLVertexFormat p_format);
void initDataFormatCapabilities();
void initMTLPixelFormatCapabilities();
void initMTLVertexFormatCapabilities(const MetalFeatures &p_feat);
void modifyMTLFormatCapabilities(const MetalFeatures &p_feat);
void buildDFFormatMaps();
void addMTLPixelFormatDescImpl(MTLPixelFormat p_pix_fmt, MTLPixelFormat p_pix_fmt_linear,
MTLViewClass p_view_class, MTLFmtCaps p_fmt_caps, const char *p_name);
void addMTLVertexFormatDescImpl(MTLVertexFormat p_vert_fmt, MTLFmtCaps p_vert_caps, const char *name);
id<MTLDevice> device;
InflectionMap<DataFormat, DataFormatDesc, RD::DATA_FORMAT_MAX> _data_format_descs;
InflectionMap<uint16_t, MTLFormatDesc, MTLPixelFormatX32_Stencil8 + 2> _mtl_pixel_format_descs; // The actual last enum value is not available on iOS.
TightLocalVector<MTLFormatDesc> _mtl_vertex_format_descs;
};
GODOT_CLANG_WARNING_POP