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xxGraphicMetal.mm
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//==============================================================================
// xxGraphic : Metal Source
//
// Copyright (c) 2019-2025 TAiGA
// https://github.com/metarutaiga/xxGraphic
//==============================================================================
#define xxCreateInstanceMetal xxConcate(xxCreateInstanceMetal, __LINE__)
#include "internal/xxGraphicInternalMetal.h"
#include "xxGraphicMetal.h"
Class classMTLCompileOptions = nil;
Class classMTLDepthStencilDescriptor = nil;
Class classMTLMeshRenderPipelineDescriptor = nil;
Class classMTLRenderPassDescriptor = nil;
Class classMTLRenderPipelineColorAttachmentDescriptor = nil;
Class classMTLRenderPipelineDescriptor = nil;
Class classMTLSamplerDescriptor = nil;
Class classMTLTextureDescriptor = nil;
Class classMTLVertexDescriptor = nil;
static void* metalLibrary = nullptr;
static MTLViewport metalViewport;
static MTLScissorRect metalScissor;
static bool metalScissorEnable = false;
static MTLVertexDescriptor* metalVertexAttribute __unused = nil;
static id <MTLDevice> (*MTLCreateSystemDefaultDevice)() NS_RETURNS_RETAINED = nullptr;
static NSArray* (*MTLCopyAllDevices)() NS_RETURNS_RETAINED = nullptr;
//==============================================================================
// Instance
//==============================================================================
static bool MTLSymbolFailed = false;
static void* MTLSymbol(char const* name)
{
void* ptr = nullptr;
if (ptr == nullptr && metalLibrary)
ptr = xxGetProcAddress(metalLibrary, name);
if (ptr == nullptr)
xxLog("Metal", "%s is not found", name);
MTLSymbolFailed |= (ptr == nullptr);
return ptr;
}
#define MTLSymbol(var) (void*&)var = MTLSymbol(#var);
//------------------------------------------------------------------------------
id xxCreateInstanceMetal()
{
if (metalLibrary == nullptr)
metalLibrary = xxLoadLibrary("/System/Library/Frameworks/Metal.framework/Metal");
if (metalLibrary == nullptr)
return 0;
MTLSymbolFailed = false;
MTLSymbol(MTLCreateSystemDefaultDevice);
#if defined(xxMACOS)
MTLSymbol(MTLCopyAllDevices);
#elif defined(xxIOS)
MTLCopyAllDevices = nullptr;
#endif
if (MTLSymbolFailed)
return 0;
classMTLCompileOptions = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLCompileOptions");
classMTLDepthStencilDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLDepthStencilDescriptor");
classMTLMeshRenderPipelineDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLMeshRenderPipelineDescriptor");
classMTLRenderPassDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLRenderPassDescriptor");
classMTLRenderPipelineColorAttachmentDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLRenderPipelineColorAttachmentDescriptor");
classMTLRenderPipelineDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLRenderPipelineDescriptor");
classMTLSamplerDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLSamplerDescriptor");
classMTLTextureDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLTextureDescriptor");
classMTLVertexDescriptor = (__bridge Class)xxGetProcAddress(metalLibrary, "OBJC_CLASS_$_MTLVertexDescriptor");
#if defined(xxMACOS)
NSArray* allDevices = MTLCopyAllDevices();
if (allDevices == nil)
return 0;
#elif defined(xxIOS)
id <MTLDevice> device = MTLCreateSystemDefaultDevice();
if (device == nil)
return 0;
NSArray* allDevices = [[NSArray alloc] initWithObjects:&device
count:1];
#endif
xxRegisterFunction(Metal);
objc_retain(allDevices);
return allDevices;
}
//------------------------------------------------------------------------------
void xxDestroyInstanceMetal(id __unsafe_unretained instance)
{
objc_release(instance);
instance = nil;
if (metalLibrary)
{
xxFreeLibrary(metalLibrary);
metalLibrary = nullptr;
}
xxUnregisterFunction();
}
//==============================================================================
// Device
//==============================================================================
id xxCreateDeviceMetal(id __unsafe_unretained instance)
{
NSArray* __unsafe_unretained allDevices = instance;
if (allDevices.count == 0)
return 0;
id <MTLDevice> __unsafe_unretained device = allDevices.firstObject;
for (NSUInteger i = 0; i < allDevices.count; ++i)
{
id <MTLDevice> __unsafe_unretained device = allDevices[i];
xxLog("xxGraphic", "%s", device.name.UTF8String);
}
objc_retain(device);
return device;
}
//------------------------------------------------------------------------------
void xxDestroyDeviceMetal(id <MTLDevice> __unsafe_unretained device)
{
objc_release(device);
device = nil;
}
//------------------------------------------------------------------------------
bool xxResetDeviceMetal(id <MTLDevice> __unsafe_unretained device)
{
return true;
}
//------------------------------------------------------------------------------
bool xxTestDeviceMetal(id <MTLDevice> __unsafe_unretained device)
{
return true;
}
//==============================================================================
// Swapchain
//==============================================================================
MTLSWAPCHAIN* xxCreateSwapchainMetal(id <MTLDevice> __unsafe_unretained device, MTLRenderPassDescriptor* __unsafe_unretained renderPass, void* view, int width, int height, MTLSWAPCHAIN* oldSwapchain)
{
if (device == nil)
return 0;
if (oldSwapchain && oldSwapchain->view == view && oldSwapchain->width == width && oldSwapchain->height == height)
return oldSwapchain;
#if defined(xxMACOS)
NSWindow* __unsafe_unretained nsWindow = (__bridge NSWindow*)view;
if (nsWindow == nil)
return 0;
NSView* __unsafe_unretained nsView = nsWindow.contentViewController.view;
if (nsView == nil)
nsView = nsWindow.contentView;
if (nsView == nil)
return 0;
float contentsScale = nsWindow.backingScaleFactor;
#elif defined(xxIOS)
UIWindow* __unsafe_unretained nsWindow = (__bridge UIWindow*)view;
if (nsWindow == nil)
return 0;
UIView* __unsafe_unretained nsView = nsWindow.rootViewController.view;
if (nsView == nil)
nsView = nsWindow;
if (nsView == nil)
return 0;
float contentsScale = nsWindow.screen.nativeScale;
#endif
MTLSWAPCHAIN* swapchain = new MTLSWAPCHAIN{};
if (swapchain == nullptr)
return 0;
xxDestroySwapchainMetal(oldSwapchain);
#if defined(xxMACOS)
CAMetalLayer* layer = [CAMetalLayer layer];
layer.displaySyncEnabled = NO;
nsView.layer = layer;
nsView.wantsLayer = YES;
#elif defined(xxIOS)
CAMetalLayer* layer = (CAMetalLayer*)nsView.layer;
layer.drawableSize = CGSizeMake(width * contentsScale, height * contentsScale);
#endif
layer.contentsScale = contentsScale;
layer.device = device;
layer.framebufferOnly = NO;
layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
swapchain->metalLayer = layer;
swapchain->drawable = [layer nextDrawable];
swapchain->commandQueue = [device newCommandQueue];
swapchain->view = nsView;
swapchain->width = width;
swapchain->height = height;
swapchain->scale = contentsScale;
MTLTEXTURE* depthStencil = xxCreateTextureMetal(device, "DS24"_cc, width * contentsScale, height * contentsScale, 1, 1, 1, nullptr);
if (depthStencil)
{
swapchain->depthstencil = depthStencil->texture;
xxDestroyTextureMetal(depthStencil);
}
return swapchain;
}
//------------------------------------------------------------------------------
void xxDestroySwapchainMetal(MTLSWAPCHAIN* swapchain)
{
delete swapchain;
}
//------------------------------------------------------------------------------
void xxPresentSwapchainMetal(MTLSWAPCHAIN* swapchain)
{
id <MTLCommandBuffer> __unsafe_unretained commandBuffer = swapchain->commandBuffer;
[commandBuffer presentDrawable:swapchain->drawable];
[commandBuffer commit];
swapchain->texture = nil;
swapchain->drawable = nil;
swapchain->commandBuffer = nil;
}
//==============================================================================
// Framebuffer
//==============================================================================
MTLFRAMEBUFFER* xxCreateFramebufferMetal(id <MTLDevice> __unsafe_unretained device, MTLTEXTURE* texture)
{
return nullptr;
}
//------------------------------------------------------------------------------
void xxDestroyFramebufferMetal(MTLFRAMEBUFFER* framebuffer)
{
}
//------------------------------------------------------------------------------
MTLFRAMEBUFFER* xxGetFramebufferMetal(id <MTLDevice> __unsafe_unretained device, MTLSWAPCHAIN* swapchain, float* scale)
{
if (scale)
{
#if defined(xxMACOS)
float scaleFactor = swapchain->view.window.backingScaleFactor;
#else
float scaleFactor = swapchain->view.contentScaleFactor;
#endif
if (swapchain->scale != scaleFactor)
{
swapchain->scale = scaleFactor;
swapchain->metalLayer.contentsScale = scaleFactor;
swapchain->metalLayer.drawableSize = CGSizeMake(swapchain->width * scaleFactor, swapchain->height * scaleFactor);
}
(*scale) = scaleFactor;
}
swapchain->drawable = [swapchain->metalLayer nextDrawable];
swapchain->texture = swapchain->drawable.texture;
return swapchain;
}
//==============================================================================
// Command Buffer
//==============================================================================
id xxGetCommandBufferMetal(id <MTLDevice> __unsafe_unretained device, MTLSWAPCHAIN* swapchain)
{
swapchain->commandBuffer = [swapchain->commandQueue commandBuffer];
return swapchain->commandBuffer;
}
//------------------------------------------------------------------------------
bool xxBeginCommandBufferMetal(uint64_t commandBuffer)
{
return true;
}
//------------------------------------------------------------------------------
void xxEndCommandBufferMetal(uint64_t commandBuffer)
{
}
//------------------------------------------------------------------------------
void xxSubmitCommandBufferMetal(uint64_t commandBuffer, uint64_t swapchain)
{
}
//==============================================================================
// Render Pass
//==============================================================================
id xxCreateRenderPassMetal(id <MTLDevice> __unsafe_unretained device, bool clearColor, bool clearDepth, bool clearStencil, bool storeColor, bool storeDepth, bool storeStencil)
{
MTLRenderPassDescriptor* renderPass = [classMTLRenderPassDescriptor new];
renderPass.colorAttachments[0].loadAction = clearColor ? MTLLoadActionClear : MTLLoadActionDontCare;
renderPass.depthAttachment.loadAction = clearDepth ? MTLLoadActionClear : MTLLoadActionDontCare;
renderPass.stencilAttachment.loadAction = clearStencil ? MTLLoadActionClear : MTLLoadActionDontCare;
renderPass.colorAttachments[0].storeAction = storeColor ? MTLStoreActionStore : MTLStoreActionDontCare;
renderPass.depthAttachment.storeAction = storeDepth ? MTLStoreActionStore : MTLStoreActionDontCare;
renderPass.stencilAttachment.storeAction = storeStencil ? MTLStoreActionStore : MTLStoreActionDontCare;
objc_retain(renderPass);
return renderPass;
}
//------------------------------------------------------------------------------
void xxDestroyRenderPassMetal(MTLRenderPassDescriptor* __unsafe_unretained renderPass)
{
objc_release(renderPass);
renderPass = nil;
}
//------------------------------------------------------------------------------
id xxBeginRenderPassMetal(id <MTLCommandBuffer> __unsafe_unretained commandBuffer, MTLFRAMEBUFFER* framebuffer, MTLRenderPassDescriptor* __unsafe_unretained renderPass, int width, int height, float color[4], float depth, unsigned char stencil)
{
renderPass.colorAttachments[0].texture = framebuffer->texture;
renderPass.depthAttachment.texture = framebuffer->depthstencil;
renderPass.colorAttachments[0].clearColor = MTLClearColorMake(color[0], color[1], color[2], color[3]);
renderPass.depthAttachment.clearDepth = depth;
renderPass.stencilAttachment.clearStencil = stencil;
id <MTLRenderCommandEncoder> commandEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPass];
if (commandEncoder == nil)
return nil;
return commandEncoder;
}
//------------------------------------------------------------------------------
void xxEndRenderPassMetal(id <MTLRenderCommandEncoder> __unsafe_unretained commandEncoder, MTLFRAMEBUFFER* framebuffer, MTLRenderPassDescriptor* __unsafe_unretained renderPass)
{
[commandEncoder endEncoding];
}
//==============================================================================
// Vertex Attribute
//==============================================================================
id xxCreateVertexAttributeMetal(id <MTLDevice> __unsafe_unretained device, int count, int* attribute)
{
MTLVertexDescriptor* vertexDescriptor = [classMTLVertexDescriptor new];
int stride = 0;
for (int i = 0; i < count; ++i)
{
int stream = (*attribute++);
int offset = (*attribute++);
int element = (*attribute++);
int size = (*attribute++);
stride += size;
MTLVertexAttributeDescriptor* __unsafe_unretained attribute = vertexDescriptor.attributes[i];
attribute.offset = offset;
attribute.bufferIndex = xxGraphicDescriptor::VERTEX_BUFFER + stream;
switch (size / ((element & 0xFF) - '0'))
{
case sizeof(char):
switch (element & 0xFF)
{
case '1':
attribute.format = MTLVertexFormat(47)/*MTLVertexFormatUCharNormalized*/;
break;
case '2':
attribute.format = MTLVertexFormatUChar2Normalized;
break;
case '3':
attribute.format = MTLVertexFormatUChar3Normalized;
break;
case '4':
if (element == 'BON4')
attribute.format = MTLVertexFormatUChar4;
else
attribute.format = MTLVertexFormatUChar4Normalized;
break;
}
break;
case sizeof(float):
switch (element & 0xFF)
{
case '1':
attribute.format = MTLVertexFormatFloat;
break;
case '2':
attribute.format = MTLVertexFormatFloat2;
break;
case '3':
attribute.format = MTLVertexFormatFloat3;
break;
case '4':
attribute.format = MTLVertexFormatFloat4;
break;
}
break;
}
}
MTLVertexBufferLayoutDescriptor* __unsafe_unretained layout = vertexDescriptor.layouts[xxGraphicDescriptor::VERTEX_BUFFER];
layout.stride = stride;
layout.stepRate = MTLVertexStepFunctionPerVertex;
objc_retain(vertexDescriptor);
return vertexDescriptor;
}
//------------------------------------------------------------------------------
void xxDestroyVertexAttributeMetal(MTLVertexDescriptor* __unsafe_unretained vertexAttribute)
{
objc_release(vertexAttribute);
vertexAttribute = nil;
}
//==============================================================================
// Buffer
//==============================================================================
id xxCreateConstantBufferMetal(id <MTLDevice> __unsafe_unretained device, int size)
{
if (device == nil)
return 0;
id <MTLBuffer> buffer = [device newBufferWithLength:size
options:MTLResourceStorageModeShared];
objc_retain(buffer);
return buffer;
}
//------------------------------------------------------------------------------
id xxCreateIndexBufferMetal(id <MTLDevice> __unsafe_unretained device, int size, int bits)
{
if (device == nil)
return 0;
id <MTLBuffer> buffer = [device newBufferWithLength:size
options:MTLResourceStorageModeShared];
objc_retain(buffer);
return buffer;
}
//------------------------------------------------------------------------------
id xxCreateVertexBufferMetal(id <MTLDevice> __unsafe_unretained device, int size, MTLVertexDescriptor* __unsafe_unretained vertexAttribute)
{
if (device == nil)
return 0;
id <MTLBuffer> buffer = [device newBufferWithLength:size
options:MTLResourceStorageModeShared];
objc_retain(buffer);
return buffer;
}
//------------------------------------------------------------------------------
id xxCreateStorageBufferMetal(id <MTLDevice> __unsafe_unretained device, int size)
{
if (device == nil)
return 0;
id <MTLBuffer> buffer = [device newBufferWithLength:size
options:MTLResourceStorageModeShared];
objc_retain(buffer);
return buffer;
}
//------------------------------------------------------------------------------
id xxCreateInstanceBufferMetal(id <MTLDevice> __unsafe_unretained device, int size)
{
if (device == nil)
return 0;
id <MTLBuffer> buffer = [device newBufferWithLength:size
options:MTLResourceStorageModeShared];
objc_retain(buffer);
return buffer;
}
//------------------------------------------------------------------------------
void xxDestroyBufferMetal(id <MTLDevice> __unsafe_unretained device, id <MTLBuffer> __unsafe_unretained buffer)
{
objc_release(buffer);
buffer = nil;
}
//------------------------------------------------------------------------------
void* xxMapBufferMetal(id <MTLDevice> __unsafe_unretained device, id <MTLBuffer> __unsafe_unretained buffer)
{
return [buffer contents];
}
//------------------------------------------------------------------------------
void xxUnmapBufferMetal(id <MTLDevice> __unsafe_unretained device, id <MTLBuffer> __unsafe_unretained buffer)
{
}
//==============================================================================
// Texture
//==============================================================================
MTLTEXTURE* xxCreateTextureMetal(id <MTLDevice> __unsafe_unretained device, uint64_t format, int width, int height, int depth, int mipmap, int array, void const* external)
{
if (device == nil)
return 0;
MTLTEXTURE* output = new MTLTEXTURE{};
if (output == nullptr)
return 0;
#define R MTLTextureSwizzleRed
#define G MTLTextureSwizzleGreen
#define B MTLTextureSwizzleBlue
#define A MTLTextureSwizzleAlpha
struct { MTLTextureSwizzleChannels swizzle; MTLPixelFormat pixelFormat; int onePixel; int stride; } T;
switch (format)
{
case "RGB565"_CC: T = { {B, G, R, A}, MTLPixelFormatB5G6R5Unorm, 2, width * 2 }; break;
case "BGR565"_CC: T = { {R, G, B, A}, MTLPixelFormatB5G6R5Unorm, 2, width * 2 }; break;
case "ARGB1555"_CC: T = { {B, G, R, A}, MTLPixelFormatA1BGR5Unorm, 2, width * 2 }; break;
case "ABGR1555"_CC: T = { {R, G, B, A}, MTLPixelFormatA1BGR5Unorm, 2, width * 2 }; break;
case "ARGB4444"_CC: T = { {B, G, R, A}, MTLPixelFormatABGR4Unorm, 2, width * 2 }; break;
case "ABGR4444"_CC: T = { {R, G, B, A}, MTLPixelFormatABGR4Unorm, 2, width * 2 }; break;
case "RGBA4444"_CC: T = { {A, B, G, R}, MTLPixelFormatABGR4Unorm, 2, width * 2 }; break;
case "BGRA4444"_CC: T = { {G, B, A, R}, MTLPixelFormatABGR4Unorm, 2, width * 2 }; break;
case "RGBA5551"_CC: T = { {B, G, R, A}, MTLPixelFormatBGR5A1Unorm, 2, width * 2 }; break;
case "BGRA5551"_CC: T = { {R, G, B, A}, MTLPixelFormatBGR5A1Unorm, 2, width * 2 }; break;
case "ARGB8888"_CC: T = { {G, B, A, R}, MTLPixelFormatRGBA8Unorm, 4, width * 4 }; break;
case "RGBA8888"_CC: T = { {R, G, B, A}, MTLPixelFormatRGBA8Unorm, 4, width * 4 }; break;
case "ABGR8888"_CC: T = { {A, R, G, B}, MTLPixelFormatBGRA8Unorm, 4, width * 4 }; break;
case "BGRA8888"_CC: T = { {R, G, B, A}, MTLPixelFormatBGRA8Unorm, 4, width * 4 }; break;
case "DS24"_cc: T = { {R, G, B, A}, MTLPixelFormatDepth32Float_Stencil8, 4, width * 4 }; break;
case "BC1"_cc:
case "DXT1"_cc: T = { {R, G, B, A}, MTLPixelFormatBC1_RGBA, 8, (width + 3) / 4 * 8 }; break;
case "BC2"_cc:
case "DXT3"_cc: T = { {R, G, B, A}, MTLPixelFormatBC2_RGBA, 16, (width + 3) / 4 * 16 }; break;
case "BC3"_cc:
case "DXT5"_cc: T = { {R, G, B, A}, MTLPixelFormatBC3_RGBA, 16, (width + 3) / 4 * 16 }; break;
case "BC4S"_cc: T = { {R, G, B, A}, MTLPixelFormatBC4_RSnorm, 8, (width + 3) / 4 * 8 }; break;
case "BC4U"_cc:
case "ATI1"_cc: T = { {R, G, B, A}, MTLPixelFormatBC4_RUnorm, 8, (width + 3) / 4 * 8 }; break;
case "BC5S"_cc: T = { {R, G, B, A}, MTLPixelFormatBC5_RGSnorm, 16, (width + 3) / 4 * 16 }; break;
case "BC5U"_cc:
case "ATI2"_cc: T = { {R, G, B, A}, MTLPixelFormatBC5_RGUnorm, 16, (width + 3) / 4 * 16 }; break;
case "BC6H"_cc: T = { {R, G, B, A}, MTLPixelFormatBC6H_RGBFloat,16, (width + 3) / 4 * 16 }; break;
case "BC7"_cc: T = { {R, G, B, A}, MTLPixelFormatBC7_RGBAUnorm,16, (width + 3) / 4 * 16 }; break;
default:
xxLog("xxGraphic", "Unknown format (%.8s)", &format);
return 0;
}
#undef R
#undef G
#undef B
#undef A
#if defined(xxMACOS_LEGACY)
MTLResourceOptions options = MTLResourceStorageModeManaged;
#else
MTLResourceOptions options = MTLResourceStorageModeShared;
#endif
IOSurfaceRef ioSurface = nullptr;
id <MTLTexture> texture = nil;
id <MTLBuffer> buffer = nil;
if (external)
{
T.pixelFormat = MTLPixelFormatBGRA8Unorm;
if ([NSStringFromClass([(__bridge id)external class]) containsString:@"IOSurface"])
{
ioSurface = (IOSurfaceRef)external;
T.stride = 0;
#if defined(xxMACOS) || defined(xxMACCATALYST)
options = MTLResourceStorageModeManaged;
#endif
}
else if ([NSStringFromClass([(__bridge id)external class]) containsString:@"Texture"])
{
texture = (__bridge id)external;
T.stride = 0;
}
else
{
buffer = (__bridge id)external;
T.stride = (int)buffer.length / height;
options = buffer.storageMode << MTLResourceStorageModeShift;
}
}
else if (mipmap == 1 && T.pixelFormat == MTLPixelFormatRGBA8Unorm)
{
int alignment = 256;
if (@available(macOS 10.13, iOS 11.0, *))
{
alignment = (int)[device minimumLinearTextureAlignmentForPixelFormat:T.pixelFormat];
}
T.stride = width * sizeof(uint32_t);
T.stride = (T.stride + (alignment - 1)) & ~(alignment - 1);
buffer = [device newBufferWithLength:T.stride * height
options:options];
}
MTLTextureDescriptor* desc = [classMTLTextureDescriptor texture2DDescriptorWithPixelFormat:T.pixelFormat
width:width
height:height
mipmapped:mipmap > 1];
desc.resourceOptions = options;
if (T.pixelFormat >= MTLPixelFormatDepth16Unorm)
{
desc.usage = MTLTextureUsageRenderTarget;
desc.resourceOptions = MTLResourceStorageModePrivate;
}
desc.swizzle = T.swizzle;
if (ioSurface)
{
texture = [device newTextureWithDescriptor:desc
iosurface:ioSurface
plane:0];
}
else if (texture)
{
}
else if (buffer)
{
texture = [buffer newTextureWithDescriptor:desc
offset:0
bytesPerRow:T.stride];
}
else
{
texture = [device newTextureWithDescriptor:desc];
}
output->texture = texture;
output->buffer = buffer;
for (int i = 0; i < mipmap; ++i)
{
output->strides[i] = (T.stride >> i);
if (output->strides[i] < T.onePixel)
output->strides[i] = T.onePixel;
}
return output;
}
//------------------------------------------------------------------------------
void xxDestroyTextureMetal(MTLTEXTURE* texture)
{
delete texture;
}
//------------------------------------------------------------------------------
void* xxMapTextureMetal(id <MTLDevice> __unsafe_unretained device, MTLTEXTURE* texture, int* stride, int level, int array)
{
if (texture == nullptr)
return nullptr;
(*stride) = texture->strides[level];
if (texture->buffer)
{
return texture->buffer.contents;
}
NSUInteger height = texture->texture.height >> level;
if (height == 0)
height = 1;
NSUInteger count = texture->strides[level] * height;
texture->temporary = xxRealloc(texture->temporary, char, count);
return texture->temporary;
}
//------------------------------------------------------------------------------
void xxUnmapTextureMetal(id <MTLDevice> __unsafe_unretained device, MTLTEXTURE* texture, int level, int array)
{
if (texture->temporary)
{
NSUInteger width = texture->texture.width >> level;
NSUInteger height = texture->texture.height >> level;
if (width == 0)
width = 1;
if (height == 0)
height = 1;
[texture->texture replaceRegion:MTLRegionMake2D(0, 0, width, height)
mipmapLevel:level
withBytes:texture->temporary
bytesPerRow:texture->strides[level]];
xxFree(texture->temporary);
texture->temporary = nullptr;
return;
}
#if TARGET_OS_SIMULATOR
[texture->texture replaceRegion:MTLRegionMake2D(0, 0, texture->texture.width, texture->texture.height)
mipmapLevel:0
withBytes:texture->buffer.contents
bytesPerRow:texture->buffer.length / texture->texture.height];
#elif defined(xxMACOS_LEGACY)
[texture->buffer didModifyRange:NSMakeRange(0, texture->buffer.length)];
#endif
}
//==============================================================================
// Sampler
//==============================================================================
id xxCreateSamplerMetal(id <MTLDevice> __unsafe_unretained device, bool clampU, bool clampV, bool clampW, bool linearMag, bool linearMin, bool linearMip, int anisotropy)
{
if (device == nil)
return 0;
MTLSamplerDescriptor* desc = [classMTLSamplerDescriptor new];
desc.sAddressMode = clampU ? MTLSamplerAddressModeClampToEdge : MTLSamplerAddressModeRepeat;
desc.tAddressMode = clampV ? MTLSamplerAddressModeClampToEdge : MTLSamplerAddressModeRepeat;
desc.rAddressMode = clampW ? MTLSamplerAddressModeClampToEdge : MTLSamplerAddressModeRepeat;
desc.magFilter = linearMag ? MTLSamplerMinMagFilterLinear : MTLSamplerMinMagFilterNearest;
desc.minFilter = linearMin ? MTLSamplerMinMagFilterLinear : MTLSamplerMinMagFilterNearest;
desc.mipFilter = linearMip ? MTLSamplerMipFilterLinear : MTLSamplerMipFilterNearest;
desc.maxAnisotropy = anisotropy;
id <MTLSamplerState> sampler = [device newSamplerStateWithDescriptor:desc];
objc_retain(sampler);
return sampler;
}
//------------------------------------------------------------------------------
void xxDestroySamplerMetal(id <MTLSamplerState> __unsafe_unretained sampler)
{
objc_release(sampler);
sampler = nil;
}
//==============================================================================
// Shader
//==============================================================================
id xxCreateMeshShaderMetal(id <MTLDevice> __unsafe_unretained device, char const* shader)
{
if (device == nil)
return 0;
if (strcmp(shader, "default") == 0)
{
shader = mtlDefaultShaderCode;
}
NSError* error;
MTLCompileOptions* options = [classMTLCompileOptions new];
options.preprocessorMacros = @{ @"SHADER_MSL" : @(1),
@"SHADER_MESH" : @(1) };;
options.fastMathEnabled = YES;
NSMutableString* code = [NSMutableString new];
[code appendString:@"#include <metal_stdlib>"];
[code appendString:@"\n"];
[code appendString:@"using namespace metal;"];
[code appendString:@"\n"];
[code appendString:@(shader)];
id <MTLLibrary> library = [device newLibraryWithSource:code
options:options
error:&error];
if (library == nil)
{
xxLog("xxGraphic", "%s", error.localizedDescription.UTF8String);
return 0;
}
id <MTLFunction> function = [library newFunctionWithName:@"Main"];
objc_retain(function);
return function;
}
//------------------------------------------------------------------------------
id xxCreateVertexShaderMetal(id <MTLDevice> __unsafe_unretained device, char const* shader, MTLVertexDescriptor* __unsafe_unretained vertexAttribute)
{
if (device == nil)
return 0;
if (strcmp(shader, "default") == 0)
{
shader = mtlDefaultShaderCode;
}
NSError* error;
MTLCompileOptions* options = [classMTLCompileOptions new];
options.preprocessorMacros = @{ @"SHADER_MSL" : @(1),
@"SHADER_VERTEX" : @(1) };;
options.fastMathEnabled = YES;
NSMutableString* code = [NSMutableString new];
[code appendString:@"#include <metal_stdlib>"];
[code appendString:@"\n"];
[code appendString:@"using namespace metal;"];
[code appendString:@"\n"];
[code appendString:@(shader)];
id <MTLLibrary> library = [device newLibraryWithSource:code
options:options
error:&error];
if (library == nil)
{
xxLog("xxGraphic", "%s", error.localizedDescription.UTF8String);
return 0;
}
id <MTLFunction> function = [library newFunctionWithName:@"Main"];
objc_retain(function);
return function;
}
//------------------------------------------------------------------------------
id xxCreateFragmentShaderMetal(id <MTLDevice> __unsafe_unretained device, char const* shader)
{
if (device == nil)
return 0;
if (strcmp(shader, "default") == 0)
{
shader = mtlDefaultShaderCode;
}
NSError* error;
MTLCompileOptions* options = [classMTLCompileOptions new];
options.preprocessorMacros = @{ @"SHADER_MSL" : @(1),
@"SHADER_FRAGMENT" : @(1) };;
options.fastMathEnabled = YES;
NSMutableString* code = [NSMutableString new];
[code appendString:@"#include <metal_stdlib>"];
[code appendString:@"\n"];
[code appendString:@"using namespace metal;"];
[code appendString:@"\n"];
[code appendString:@(shader)];
id <MTLLibrary> library = [device newLibraryWithSource:code
options:options
error:&error];
if (library == nil)
{
xxLog("xxGraphic", "%s", error.localizedDescription.UTF8String);
return 0;
}
id <MTLFunction> function = [library newFunctionWithName:@"Main"];
objc_retain(function);
return function;
}
//------------------------------------------------------------------------------
void xxDestroyShaderMetal(id <MTLDevice> __unsafe_unretained device, id <MTLFunction> __unsafe_unretained shader)
{
objc_release(shader);
shader = nil;
}
//==============================================================================
// Pipeline
//==============================================================================
id xxCreateBlendStateMetal(id <MTLDevice> __unsafe_unretained device, char const* sourceColor, char const* operationColor, char const* destinationColor, char const* sourceAlpha, char const* operationAlpha, char const* destinationAlpha)
{
MTLRenderPipelineColorAttachmentDescriptor* desc = [classMTLRenderPipelineColorAttachmentDescriptor new];
desc.pixelFormat = MTLPixelFormatBGRA8Unorm;
desc.sourceRGBBlendFactor = mtlBlendFactor(sourceColor);
desc.destinationRGBBlendFactor = mtlBlendFactor(destinationColor);
desc.rgbBlendOperation = mtlBlendOp(operationColor);
desc.sourceAlphaBlendFactor = mtlBlendFactor(sourceAlpha);
desc.destinationAlphaBlendFactor = mtlBlendFactor(destinationAlpha);
desc.alphaBlendOperation = mtlBlendOp(operationAlpha);
desc.blendingEnabled = (desc.sourceRGBBlendFactor != MTLBlendFactorOne ||
desc.destinationRGBBlendFactor != MTLBlendFactorZero ||
desc.rgbBlendOperation != MTLBlendOperationAdd ||
desc.sourceAlphaBlendFactor != MTLBlendFactorOne ||
desc.destinationAlphaBlendFactor != MTLBlendFactorZero ||
desc.alphaBlendOperation != MTLBlendOperationAdd) ? YES : NO;
objc_retain(desc);
return desc;
}
//------------------------------------------------------------------------------
id xxCreateDepthStencilStateMetal(id <MTLDevice> __unsafe_unretained device, char const* depthTest, bool depthWrite)
{
MTLDepthStencilDescriptor* desc = [classMTLDepthStencilDescriptor new];
desc.depthCompareFunction = mtlCompareOp(depthTest);
desc.depthWriteEnabled = depthWrite;
id <MTLDepthStencilState> depthStencilState = [device newDepthStencilStateWithDescriptor:desc];
objc_retain(depthStencilState);
return depthStencilState;
}
//------------------------------------------------------------------------------
uint64_t xxCreateRasterizerStateMetal(id <MTLDevice> __unsafe_unretained device, bool cull, bool scissor)
{
uint64_t state = 0;
state |= (cull << 0);
state |= (scissor << 1);
return state;
}
//------------------------------------------------------------------------------
MTLPIPELINE* xxCreatePipelineMetal(id <MTLDevice> __unsafe_unretained device, MTLRenderPassDescriptor* __unsafe_unretained renderPass, MTLRenderPipelineColorAttachmentDescriptor* __unsafe_unretained blendState, id <MTLDepthStencilState> __unsafe_unretained depthStencilState, uint64_t rasterizerState, MTLVertexDescriptor* __unsafe_unretained vertexAttribute, id <MTLFunction> __unsafe_unretained meshShader, id <MTLFunction> __unsafe_unretained vertexShader, id <MTLFunction> __unsafe_unretained fragmentShader)
{
if (device == nil)
return 0;
MTLPIPELINE* pipeline = new MTLPIPELINE{};
if (pipeline == nullptr)
return 0;
NSError* error;
if (meshShader)
{
MTLMeshRenderPipelineDescriptor* desc = [classMTLMeshRenderPipelineDescriptor new];
desc.meshFunction = meshShader;
desc.fragmentFunction = fragmentShader;
desc.colorAttachments[0] = blendState;
desc.depthAttachmentPixelFormat = MTLPixelFormatDepth32Float_Stencil8;
pipeline->pipeline = [device newRenderPipelineStateWithMeshDescriptor:desc
options:MTLPipelineOptionNone
reflection:nil
error:&error];
}
else
{
MTLRenderPipelineDescriptor* desc = [classMTLRenderPipelineDescriptor new];
desc.vertexFunction = vertexShader;
desc.fragmentFunction = fragmentShader;
desc.vertexDescriptor = vertexAttribute;
desc.colorAttachments[0] = blendState;
desc.depthAttachmentPixelFormat = MTLPixelFormatDepth32Float_Stencil8;
pipeline->pipeline = [device newRenderPipelineStateWithDescriptor:desc
error:&error];
}
if (pipeline->pipeline == nil)
{
xxLog("xxGraphic", "%s", error.localizedDescription.UTF8String);
return 0;
}
pipeline->depthStencil = depthStencilState;
pipeline->cullMode = (rasterizerState & 1) ? MTLCullModeBack : MTLCullModeNone;
pipeline->scissorEnable = (rasterizerState & 2) != 0;
return pipeline;
}
//------------------------------------------------------------------------------
void xxDestroyBlendStateMetal(MTLRenderPipelineColorAttachmentDescriptor* __unsafe_unretained blendState)
{
objc_release(blendState);
blendState = nil;
}
//------------------------------------------------------------------------------
void xxDestroyDepthStencilStateMetal(id <MTLDepthStencilState> __unsafe_unretained depthStencilState)
{
objc_release(depthStencilState);
depthStencilState = nil;
}
//------------------------------------------------------------------------------
void xxDestroyRasterizerStateMetal(uint64_t rasterizerState)
{
}
//------------------------------------------------------------------------------
void xxDestroyPipelineMetal(MTLPIPELINE* pipeline)
{
delete pipeline;
}
//==============================================================================
// Command
//==============================================================================
void xxSetViewportMetal(id <MTLRenderCommandEncoder> __unsafe_unretained commandEncoder, int x, int y, int width, int height, float minZ, float maxZ)
{
MTLViewport vp;
vp.originX = x;
vp.originY = y;
vp.width = width;
vp.height = height;
vp.znear = minZ;
vp.zfar = maxZ;
[commandEncoder setViewport:vp];
metalViewport = vp;
}
//------------------------------------------------------------------------------
void xxSetScissorMetal(id <MTLRenderCommandEncoder> __unsafe_unretained commandEncoder, int x, int y, int width, int height)
{
MTLScissorRect rect;
rect.x = x;
rect.y = y;
rect.width = width;
rect.height = height;
[commandEncoder setScissorRect:rect];
metalScissor = rect;
metalScissorEnable = (width != metalViewport.width || height != metalViewport.height);
}
//------------------------------------------------------------------------------
void xxSetPipelineMetal(id <MTLRenderCommandEncoder> __unsafe_unretained commandEncoder, MTLPIPELINE* pipeline)
{
[commandEncoder setRenderPipelineState:pipeline->pipeline];
[commandEncoder setDepthStencilState:pipeline->depthStencil];
[commandEncoder setCullMode:pipeline->cullMode];
if (metalScissorEnable != pipeline->scissorEnable)
{
if (pipeline->scissorEnable)
{
[commandEncoder setScissorRect:metalScissor];
metalScissorEnable = true;
}
else
{
MTLScissorRect rect;
rect.x = 0;
rect.y = 0;
rect.width = metalViewport.width;
rect.height = metalViewport.height;
[commandEncoder setScissorRect:rect];
metalScissorEnable = false;
}
}
}
//------------------------------------------------------------------------------
void xxSetMeshBuffersMetal(id <MTLRenderCommandEncoder> __unsafe_unretained commandEncoder, int count, id <MTLBuffer> __unsafe_unretained* buffers)
{