src/WSI/FrameBuffer.cpp - SwiftShader - Git at Google

 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
 //
 // 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 "FrameBuffer.hpp"

 #include "Device/Surface.hpp"
 #include "Reactor/Reactor.hpp"
 #include "System/Timer.hpp"
 #include "System/Debug.hpp"

 #include <stdio.h>
 #include <string.h>
 #include <time.h>

 #define ASYNCHRONOUS_BLIT false   // FIXME: Currently leads to rare race conditions

 namespace sw
 {
 	extern bool forceWindowed;

 	FrameBuffer::Cursor FrameBuffer::cursor = {};
 	bool FrameBuffer::topLeftOrigin = false;

 	FrameBuffer::FrameBuffer(int width, int height, bool fullscreen, bool topLeftOrigin)
 	{
 		this->topLeftOrigin = topLeftOrigin;

 		framebuffer = nullptr;

 		this->width = width;
 		this->height = height;
 		format = VK_FORMAT_B8G8R8A8_UNORM;
 		stride = 0;

 		windowed = !fullscreen || forceWindowed;

 		blitFunction = nullptr;
 		blitRoutine = nullptr;
 		blitState = {};

 		if(ASYNCHRONOUS_BLIT)
 		{
 			terminate = false;
 			FrameBuffer *parameters = this;
 			blitThread = new Thread(threadFunction, &parameters);
 		}
 	}

 	FrameBuffer::~FrameBuffer()
 	{
 		if(ASYNCHRONOUS_BLIT)
 		{
 			terminate = true;
 			blitEvent.signal();
 			blitThread->join();
 			delete blitThread;
 		}

 		delete blitRoutine;
 	}

 	void FrameBuffer::setCursorImage(sw::Surface *cursorImage)
 	{
 		if(cursorImage)
 		{
 			cursor.image = cursorImage->lockExternal(0, 0, 0, sw::LOCK_READONLY, sw::PUBLIC);
 			cursorImage->unlockExternal();

 			cursor.width = cursorImage->getWidth();
 			cursor.height = cursorImage->getHeight();
 		}
 		else
 		{
 			cursor.width = 0;
 			cursor.height = 0;
 		}
 	}

 	void FrameBuffer::setCursorOrigin(int x0, int y0)
 	{
 		cursor.hotspotX = x0;
 		cursor.hotspotY = y0;
 	}

 	void FrameBuffer::setCursorPosition(int x, int y)
 	{
 		cursor.positionX = x;
 		cursor.positionY = y;
 	}

 	void FrameBuffer::copy(sw::Surface *source)
 	{
 		if(!source)
 		{
 			return;
 		}

 		if(!lock())
 		{
 			return;
 		}

 		int sourceStride = source->getInternalPitchB();

 		updateState = {};
 		updateState.width = width;
 		updateState.height = height;
 		updateState.destFormat = format;
 		updateState.destStride = stride;
 		updateState.sourceFormat = source->getInternalFormat();
 		updateState.sourceStride = topLeftOrigin ? sourceStride : -sourceStride;
 		updateState.cursorWidth = cursor.width;
 		updateState.cursorHeight = cursor.height;

 		renderbuffer = source->lockInternal(0, 0, 0, sw::LOCK_READONLY, sw::PUBLIC);

 		if(!topLeftOrigin)
 		{
 			renderbuffer = (byte*)renderbuffer + (height - 1) * sourceStride;
 		}

 		cursor.x = cursor.positionX - cursor.hotspotX;
 		cursor.y = cursor.positionY - cursor.hotspotY;

 		if(ASYNCHRONOUS_BLIT)
 		{
 			blitEvent.signal();
 			syncEvent.wait();
 		}
 		else
 		{
 			copyLocked();
 		}

 		source->unlockInternal();
 		unlock();

 		profiler.nextFrame();   // Assumes every copy() is a full frame
 	}

 	void FrameBuffer::copyLocked()
 	{
 		if(memcmp(&blitState, &updateState, sizeof(BlitState)) != 0)
 		{
 			blitState = updateState;
 			delete blitRoutine;

 			blitRoutine = copyRoutine(blitState);
 			blitFunction = (void(*)(void*, void*, Cursor*))blitRoutine->getEntry();
 		}

 		blitFunction(framebuffer, renderbuffer, &cursor);
 	}

 	Routine *FrameBuffer::copyRoutine(const BlitState &state)
 	{
 		const int width = state.width;
 		const int height = state.height;
 		const int dBytes = Surface::bytes(state.destFormat);
 		const int dStride = state.destStride;
 		const int sBytes = Surface::bytes(state.sourceFormat);
 		const int sStride = state.sourceStride;

 		Function<Void(Pointer<Byte>, Pointer<Byte>, Pointer<Byte>)> function;
 		{
 			Pointer<Byte> dst(function.Arg<0>());
 			Pointer<Byte> src(function.Arg<1>());
 			Pointer<Byte> cursor(function.Arg<2>());

 			For(Int y = 0, y < height, y++)
 			{
 				Pointer<Byte> d = dst + y * dStride;
 				Pointer<Byte> s = src + y * sStride;

 				Int x0 = 0;

 				switch(state.destFormat)
 				{
 				case VK_FORMAT_B8G8R8A8_UNORM:
 					{
 						Int x = x0;

 						switch(state.sourceFormat)
 						{
 						case VK_FORMAT_B8G8R8A8_UNORM:
 							For(, x < width - 3, x += 4)
 							{
 								*Pointer<Int4>(d, 1) = *Pointer<Int4>(s, sStride % 16 ? 1 : 16);

 								s += 4 * sBytes;
 								d += 4 * dBytes;
 							}
 							break;
 						case VK_FORMAT_R8G8B8A8_UNORM:
 							For(, x < width - 3, x += 4)
 							{
 								Int4 bgra = *Pointer<Int4>(s, sStride % 16 ? 1 : 16);

 								*Pointer<Int4>(d, 1) = ((bgra & Int4(0x00FF0000)) >> 16) |
 								                       ((bgra & Int4(0x000000FF)) << 16) |
 								                       (bgra & Int4(0xFF00FF00));

 								s += 4 * sBytes;
 								d += 4 * dBytes;
 							}
 							break;
 						case VK_FORMAT_R16G16B16A16_UNORM:
 							For(, x < width - 1, x += 2)
 							{
 								Short4 c0 = As<UShort4>(Swizzle(*Pointer<Short4>(s + 0), 0xC6)) >> 8;
 								Short4 c1 = As<UShort4>(Swizzle(*Pointer<Short4>(s + 8), 0xC6)) >> 8;

 								*Pointer<Int2>(d) = As<Int2>(PackUnsigned(c0, c1));

 								s += 2 * sBytes;
 								d += 2 * dBytes;
 							}
 							break;
 						case VK_FORMAT_R5G6B5_UNORM_PACK16:
 							For(, x < width - 3, x += 4)
 							{
 								Int4 rgb = Int4(*Pointer<Short4>(s));

 								*Pointer<Int4>(d) = (((rgb & Int4(0xF800)) << 8) | ((rgb & Int4(0xE01F)) << 3)) |
 								                    (((rgb & Int4(0x07E0)) << 5) | ((rgb & Int4(0x0600)) >> 1)) |
 								                    (((rgb & Int4(0x001C)) >> 2) | Int4(0xFF000000));

 								s += 4 * sBytes;
 								d += 4 * dBytes;
 							}
 							break;
 						default:
 							ASSERT(false);
 							break;
 						}

 						For(, x < width, x++)
 						{
 							switch(state.sourceFormat)
 							{
 							case VK_FORMAT_B8G8R8A8_UNORM:
 								*Pointer<Int>(d) = *Pointer<Int>(s);
 								break;
 							case VK_FORMAT_R8G8B8A8_UNORM:
 								{
 									Int rgba = *Pointer<Int>(s);

 									*Pointer<Int>(d) = ((rgba & Int(0x00FF0000)) >> 16) |
 									                   ((rgba & Int(0x000000FF)) << 16) |
 									                   (rgba & Int(0xFF00FF00));
 								}
 								break;
 							case VK_FORMAT_R16G16B16A16_UNORM:
 								{
 									Short4 c = As<UShort4>(Swizzle(*Pointer<Short4>(s), 0xC6)) >> 8;

 									*Pointer<Int>(d) = Int(As<Int2>(PackUnsigned(c, c)));
 								}
 								break;
 							case VK_FORMAT_R5G6B5_UNORM_PACK16:
 								{
 									Int rgb = Int(*Pointer<Short>(s));

 									*Pointer<Int>(d) = 0xFF000000 |
 									                   ((rgb & 0xF800) << 8) | ((rgb & 0xE01F) << 3) |
 								                       ((rgb & 0x07E0) << 5) | ((rgb & 0x0600) >> 1) |
 								                       ((rgb & 0x001C) >> 2);
 								}
 								break;
 							default:
 								ASSERT(false);
 								break;
 							}

 							s += sBytes;
 							d += dBytes;
 						}
 					}
 					break;
 				case VK_FORMAT_R8G8B8A8_UNORM:
 				case VK_FORMAT_R8G8B8A8_SRGB:
 					{
 						Int x = x0;

 						switch(state.sourceFormat)
 						{
 						case VK_FORMAT_R8G8B8A8_UNORM:
 							For(, x < width - 3, x += 4)
 							{
 								*Pointer<Int4>(d, 1) = *Pointer<Int4>(s, sStride % 16 ? 1 : 16);

 								s += 4 * sBytes;
 								d += 4 * dBytes;
 							}
 							break;
 						case VK_FORMAT_B8G8R8A8_UNORM:
 							For(, x < width - 3, x += 4)
 							{
 								Int4 bgra = *Pointer<Int4>(s, sStride % 16 ? 1 : 16);

 								*Pointer<Int4>(d, 1) = ((bgra & Int4(0x00FF0000)) >> 16) |
 								                       ((bgra & Int4(0x000000FF)) << 16) |
 								                       (bgra & Int4(0xFF00FF00));

 								s += 4 * sBytes;
 								d += 4 * dBytes;
 							}
 							break;
 						case VK_FORMAT_R16G16B16A16_UNORM:
 							For(, x < width - 1, x += 2)
 							{
 								Short4 c0 = *Pointer<UShort4>(s + 0) >> 8;
 								Short4 c1 = *Pointer<UShort4>(s + 8) >> 8;

 								*Pointer<Int2>(d) = As<Int2>(PackUnsigned(c0, c1));

 								s += 2 * sBytes;
 								d += 2 * dBytes;
 							}
 							break;
 						case VK_FORMAT_R5G6B5_UNORM_PACK16:
 							For(, x < width - 3, x += 4)
 							{
 								Int4 rgb = Int4(*Pointer<Short4>(s));

 								*Pointer<Int4>(d) = Int4(0xFF000000) |
                                                     (((rgb & Int4(0x001F)) << 19) | ((rgb & Int4(0x001C)) << 14)) |
 								                    (((rgb & Int4(0x07E0)) << 5) | ((rgb & Int4(0x0600)) >> 1)) |
 								                    (((rgb & Int4(0xF800)) >> 8) | ((rgb & Int4(0xE000)) >> 13));

 								s += 4 * sBytes;
 								d += 4 * dBytes;
 							}
 							break;
 						default:
 							ASSERT(false);
 							break;
 						}

 						For(, x < width, x++)
 						{
 							switch(state.sourceFormat)
 							{
 							case VK_FORMAT_R8G8B8A8_UNORM:
 								*Pointer<Int>(d) = *Pointer<Int>(s);
 								break;
 							case VK_FORMAT_B8G8R8A8_UNORM:
 								{
 									Int bgra = *Pointer<Int>(s);
 									*Pointer<Int>(d) = ((bgra & Int(0x00FF0000)) >> 16) |
 									                   ((bgra & Int(0x000000FF)) << 16) |
 									                   (bgra & Int(0xFF00FF00));
 								}
 								break;
 							case VK_FORMAT_R16G16B16A16_UNORM:
 								{
 									Short4 c = *Pointer<UShort4>(s) >> 8;

 									*Pointer<Int>(d) = Int(As<Int2>(PackUnsigned(c, c)));
 								}
 								break;
 							case VK_FORMAT_R5G6B5_UNORM_PACK16:
 								{
 									Int rgb = Int(*Pointer<Short>(s));

 									*Pointer<Int>(d) = 0xFF000000 |
 									                   ((rgb & 0x001F) << 19) | ((rgb & 0x001C) << 14) |
 								                       ((rgb & 0x07E0) << 5) | ((rgb & 0x0600) >> 1) |
 								                       ((rgb & 0xF800) >> 8) | ((rgb & 0xE000) >> 13);
 								}
 								break;
 							default:
 								ASSERT(false);
 								break;
 							}

 							s += sBytes;
 							d += dBytes;
 						}
 					}
 					break;
 				case VK_FORMAT_R5G6B5_UNORM_PACK16:
 					{
 						For(Int x = x0, x < width, x++)
 						{
 							switch(state.sourceFormat)
 							{
 							case VK_FORMAT_B8G8R8A8_UNORM:
 								{
 									Int c = *Pointer<Int>(s);

 									*Pointer<Short>(d) = Short((c & 0x00F80000) >> 8 |
 									                           (c & 0x0000FC00) >> 5 |
 									                           (c & 0x000000F8) >> 3);
 								}
 								break;
 							case VK_FORMAT_R8G8B8A8_UNORM:
 								{
 									Int c = *Pointer<Int>(s);

 									*Pointer<Short>(d) = Short((c & 0x00F80000) >> 19 |
 									                           (c & 0x0000FC00) >> 5 |
 									                           (c & 0x000000F8) << 8);
 								}
 								break;
 							case VK_FORMAT_R16G16B16A16_UNORM:
 								{
 									Short4 cc = *Pointer<UShort4>(s) >> 8;
 									Int c = Int(As<Int2>(PackUnsigned(cc, cc)));

 									*Pointer<Short>(d) = Short((c & 0x00F80000) >> 19 |
 									                           (c & 0x0000FC00) >> 5 |
 									                           (c & 0x000000F8) << 8);
 								}
 								break;
 							case VK_FORMAT_R5G6B5_UNORM_PACK16:
 								*Pointer<Short>(d) = *Pointer<Short>(s);
 								break;
 							default:
 								ASSERT(false);
 								break;
 							}

 							s += sBytes;
 							d += dBytes;
 						}
 					}
 					break;
 				default:
 					ASSERT(false);
 					break;
 				}
 			}

 			if(state.cursorWidth > 0 && state.cursorHeight > 0)
 			{
 				Int x0 = *Pointer<Int>(cursor + OFFSET(Cursor,x));
 				Int y0 = *Pointer<Int>(cursor + OFFSET(Cursor,y));

 				For(Int y1 = 0, y1 < state.cursorHeight, y1++)
 				{
 					Int y = y0 + y1;

 					If(y >= 0 && y < height)
 					{
 						Pointer<Byte> d = dst + y * dStride + x0 * dBytes;
 						Pointer<Byte> s = src + y * sStride + x0 * sBytes;
 						Pointer<Byte> c = *Pointer<Pointer<Byte>>(cursor + OFFSET(Cursor,image)) + y1 * state.cursorWidth * 4;

 						For(Int x1 = 0, x1 < state.cursorWidth, x1++)
 						{
 							Int x = x0 + x1;

 							If(x >= 0 && x < width)
 							{
 								blend(state, d, s, c);
 							}

 							c += 4;
 							s += sBytes;
 							d += dBytes;
 						}
 					}
 				}
 			}
 		}

 		return function("FrameBuffer");
 	}

 	void FrameBuffer::blend(const BlitState &state, const Pointer<Byte> &d, const Pointer<Byte> &s, const Pointer<Byte> &c)
 	{
 		Short4 c1;
 		Short4 c2;

 		c1 = Unpack(*Pointer<Byte4>(c));

 		switch(state.sourceFormat)
 		{
 		case VK_FORMAT_B8G8R8A8_UNORM:
 			c2 = Unpack(*Pointer<Byte4>(s));
 			break;
 		case VK_FORMAT_R8G8B8A8_UNORM:
 			c2 = Swizzle(Unpack(*Pointer<Byte4>(s)), 0xC6);
 			break;
 		case VK_FORMAT_R16G16B16A16_UNORM:
 			c2 = Swizzle(*Pointer<Short4>(s), 0xC6);
 			break;
 		case VK_FORMAT_R5G6B5_UNORM_PACK16:
 			{
 				Int rgb(*Pointer<Short>(s));
 				rgb = 0xFF000000 |
 				      ((rgb & 0xF800) << 8) | ((rgb & 0xE01F) << 3) |
 				      ((rgb & 0x07E0) << 5) | ((rgb & 0x0600) >> 1) |
 				      ((rgb & 0x001C) >> 2);
 				c2 = Unpack(As<Byte4>(rgb));
 			}
 			break;
 		default:
 			ASSERT(false);
 			break;
 		}

 		c1 = As<Short4>(As<UShort4>(c1) >> 9);
 		c2 = As<Short4>(As<UShort4>(c2) >> 9);

 		Short4 alpha = Swizzle(c1, 0xFF) & Short4(0xFFFFu, 0xFFFFu, 0xFFFFu, 0x0000);

 		c1 = (c1 - c2) * alpha;
 		c1 = c1 >> 7;
 		c1 = c1 + c2;
 		c1 = c1 + c1;

 		switch(state.destFormat)
 		{
 		case VK_FORMAT_B8G8R8A8_UNORM:
 			*Pointer<Byte4>(d) = Byte4(PackUnsigned(c1, c1));
 			break;
 		case VK_FORMAT_R8G8B8A8_UNORM:
 		case VK_FORMAT_R8G8B8A8_SRGB:
 			{
 				c1 = Swizzle(c1, 0xC6);

 				*Pointer<Byte4>(d) = Byte4(PackUnsigned(c1, c1));
 			}
 			break;
 		case VK_FORMAT_R5G6B5_UNORM_PACK16:
 			{
 				Int c = Int(As<Int2>(PackUnsigned(c1, c1)));

 				*Pointer<Short>(d) = Short((c & 0x00F80000) >> 8 |
 				                           (c & 0x0000FC00) >> 5 |
 				                           (c & 0x000000F8) >> 3);
 			}
 			break;
 		default:
 			ASSERT(false);
 			break;
 		}
 	}

 	void FrameBuffer::threadFunction(void *parameters)
 	{
 		FrameBuffer *frameBuffer = *static_cast<FrameBuffer**>(parameters);

 		while(!frameBuffer->terminate)
 		{
 			frameBuffer->blitEvent.wait();

 			if(!frameBuffer->terminate)
 			{
 				frameBuffer->copyLocked();

 				frameBuffer->syncEvent.signal();
 			}
 		}
 	}
 }
	// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
	//
	// 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 "FrameBuffer.hpp"

	#include "Device/Surface.hpp"
	#include "Reactor/Reactor.hpp"
	#include "System/Timer.hpp"
	#include "System/Debug.hpp"

	#include <stdio.h>
	#include <string.h>
	#include <time.h>

	#define ASYNCHRONOUS_BLIT false // FIXME: Currently leads to rare race conditions

	namespace sw
	{
	extern bool forceWindowed;

	FrameBuffer::Cursor FrameBuffer::cursor = {};
	bool FrameBuffer::topLeftOrigin = false;

	FrameBuffer::FrameBuffer(int width, int height, bool fullscreen, bool topLeftOrigin)
	{
	this->topLeftOrigin = topLeftOrigin;

	framebuffer = nullptr;

	this->width = width;
	this->height = height;
	format = VK_FORMAT_B8G8R8A8_UNORM;
	stride = 0;

	windowed = !fullscreen \|\| forceWindowed;

	blitFunction = nullptr;
	blitRoutine = nullptr;
	blitState = {};

	if(ASYNCHRONOUS_BLIT)
	{
	terminate = false;
	FrameBuffer *parameters = this;
	blitThread = new Thread(threadFunction, &parameters);
	}
	}

	FrameBuffer::~FrameBuffer()
	{
	if(ASYNCHRONOUS_BLIT)
	{
	terminate = true;
	blitEvent.signal();
	blitThread->join();
	delete blitThread;
	}

	delete blitRoutine;
	}

	void FrameBuffer::setCursorImage(sw::Surface *cursorImage)
	{
	if(cursorImage)
	{
	cursor.image = cursorImage->lockExternal(0, 0, 0, sw::LOCK_READONLY, sw::PUBLIC);
	cursorImage->unlockExternal();

	cursor.width = cursorImage->getWidth();
	cursor.height = cursorImage->getHeight();
	}
	else
	{
	cursor.width = 0;
	cursor.height = 0;
	}
	}

	void FrameBuffer::setCursorOrigin(int x0, int y0)
	{
	cursor.hotspotX = x0;
	cursor.hotspotY = y0;
	}

	void FrameBuffer::setCursorPosition(int x, int y)
	{
	cursor.positionX = x;
	cursor.positionY = y;
	}

	void FrameBuffer::copy(sw::Surface *source)
	{
	if(!source)
	{
	return;
	}

	if(!lock())
	{
	return;
	}

	int sourceStride = source->getInternalPitchB();

	updateState = {};
	updateState.width = width;
	updateState.height = height;
	updateState.destFormat = format;
	updateState.destStride = stride;
	updateState.sourceFormat = source->getInternalFormat();
	updateState.sourceStride = topLeftOrigin ? sourceStride : -sourceStride;
	updateState.cursorWidth = cursor.width;
	updateState.cursorHeight = cursor.height;

	renderbuffer = source->lockInternal(0, 0, 0, sw::LOCK_READONLY, sw::PUBLIC);

	if(!topLeftOrigin)
	{
	renderbuffer = (byte)renderbuffer + (height - 1) sourceStride;
	}

	cursor.x = cursor.positionX - cursor.hotspotX;
	cursor.y = cursor.positionY - cursor.hotspotY;

	if(ASYNCHRONOUS_BLIT)
	{
	blitEvent.signal();
	syncEvent.wait();
	}
	else
	{
	copyLocked();
	}

	source->unlockInternal();
	unlock();

	profiler.nextFrame(); // Assumes every copy() is a full frame
	}

	void FrameBuffer::copyLocked()
	{
	if(memcmp(&blitState, &updateState, sizeof(BlitState)) != 0)
	{
	blitState = updateState;
	delete blitRoutine;

	blitRoutine = copyRoutine(blitState);
	blitFunction = (void()(void, void, Cursor))blitRoutine->getEntry();
	}

	blitFunction(framebuffer, renderbuffer, &cursor);
	}

	Routine *FrameBuffer::copyRoutine(const BlitState &state)
	{
	const int width = state.width;
	const int height = state.height;
	const int dBytes = Surface::bytes(state.destFormat);
	const int dStride = state.destStride;
	const int sBytes = Surface::bytes(state.sourceFormat);
	const int sStride = state.sourceStride;

	Function<Void(Pointer<Byte>, Pointer<Byte>, Pointer<Byte>)> function;
	{
	Pointer<Byte> dst(function.Arg<0>());
	Pointer<Byte> src(function.Arg<1>());
	Pointer<Byte> cursor(function.Arg<2>());

	For(Int y = 0, y < height, y++)
	{
	Pointer<Byte> d = dst + y * dStride;
	Pointer<Byte> s = src + y * sStride;

	Int x0 = 0;

	switch(state.destFormat)
	{
	case VK_FORMAT_B8G8R8A8_UNORM:
	{
	Int x = x0;

	switch(state.sourceFormat)
	{
	case VK_FORMAT_B8G8R8A8_UNORM:
	For(, x < width - 3, x += 4)
	{
	Pointer<Int4>(d, 1) = Pointer<Int4>(s, sStride % 16 ? 1 : 16);

	s += 4 * sBytes;
	d += 4 * dBytes;
	}
	break;
	case VK_FORMAT_R8G8B8A8_UNORM:
	For(, x < width - 3, x += 4)
	{
	Int4 bgra = *Pointer<Int4>(s, sStride % 16 ? 1 : 16);

	*Pointer<Int4>(d, 1) = ((bgra & Int4(0x00FF0000)) >> 16) \|
	((bgra & Int4(0x000000FF)) << 16) \|
	(bgra & Int4(0xFF00FF00));

	s += 4 * sBytes;
	d += 4 * dBytes;
	}
	break;
	case VK_FORMAT_R16G16B16A16_UNORM:
	For(, x < width - 1, x += 2)
	{
	Short4 c0 = As<UShort4>(Swizzle(*Pointer<Short4>(s + 0), 0xC6)) >> 8;
	Short4 c1 = As<UShort4>(Swizzle(*Pointer<Short4>(s + 8), 0xC6)) >> 8;

	*Pointer<Int2>(d) = As<Int2>(PackUnsigned(c0, c1));

	s += 2 * sBytes;
	d += 2 * dBytes;
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	For(, x < width - 3, x += 4)
	{
	Int4 rgb = Int4(*Pointer<Short4>(s));

	*Pointer<Int4>(d) = (((rgb & Int4(0xF800)) << 8) \| ((rgb & Int4(0xE01F)) << 3)) \|
	(((rgb & Int4(0x07E0)) << 5) \| ((rgb & Int4(0x0600)) >> 1)) \|
	(((rgb & Int4(0x001C)) >> 2) \| Int4(0xFF000000));

	s += 4 * sBytes;
	d += 4 * dBytes;
	}
	break;
	default:
	ASSERT(false);
	break;
	}

	For(, x < width, x++)
	{
	switch(state.sourceFormat)
	{
	case VK_FORMAT_B8G8R8A8_UNORM:
	Pointer<Int>(d) = Pointer<Int>(s);
	break;
	case VK_FORMAT_R8G8B8A8_UNORM:
	{
	Int rgba = *Pointer<Int>(s);

	*Pointer<Int>(d) = ((rgba & Int(0x00FF0000)) >> 16) \|
	((rgba & Int(0x000000FF)) << 16) \|
	(rgba & Int(0xFF00FF00));
	}
	break;
	case VK_FORMAT_R16G16B16A16_UNORM:
	{
	Short4 c = As<UShort4>(Swizzle(*Pointer<Short4>(s), 0xC6)) >> 8;

	*Pointer<Int>(d) = Int(As<Int2>(PackUnsigned(c, c)));
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	{
	Int rgb = Int(*Pointer<Short>(s));

	*Pointer<Int>(d) = 0xFF000000 \|
	((rgb & 0xF800) << 8) \| ((rgb & 0xE01F) << 3) \|
	((rgb & 0x07E0) << 5) \| ((rgb & 0x0600) >> 1) \|
	((rgb & 0x001C) >> 2);
	}
	break;
	default:
	ASSERT(false);
	break;
	}

	s += sBytes;
	d += dBytes;
	}
	}
	break;
	case VK_FORMAT_R8G8B8A8_UNORM:
	case VK_FORMAT_R8G8B8A8_SRGB:
	{
	Int x = x0;

	switch(state.sourceFormat)
	{
	case VK_FORMAT_R8G8B8A8_UNORM:
	For(, x < width - 3, x += 4)
	{
	Pointer<Int4>(d, 1) = Pointer<Int4>(s, sStride % 16 ? 1 : 16);

	s += 4 * sBytes;
	d += 4 * dBytes;
	}
	break;
	case VK_FORMAT_B8G8R8A8_UNORM:
	For(, x < width - 3, x += 4)
	{
	Int4 bgra = *Pointer<Int4>(s, sStride % 16 ? 1 : 16);

	*Pointer<Int4>(d, 1) = ((bgra & Int4(0x00FF0000)) >> 16) \|
	((bgra & Int4(0x000000FF)) << 16) \|
	(bgra & Int4(0xFF00FF00));

	s += 4 * sBytes;
	d += 4 * dBytes;
	}
	break;
	case VK_FORMAT_R16G16B16A16_UNORM:
	For(, x < width - 1, x += 2)
	{
	Short4 c0 = *Pointer<UShort4>(s + 0) >> 8;
	Short4 c1 = *Pointer<UShort4>(s + 8) >> 8;

	*Pointer<Int2>(d) = As<Int2>(PackUnsigned(c0, c1));

	s += 2 * sBytes;
	d += 2 * dBytes;
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	For(, x < width - 3, x += 4)
	{
	Int4 rgb = Int4(*Pointer<Short4>(s));

	*Pointer<Int4>(d) = Int4(0xFF000000) \|
	(((rgb & Int4(0x001F)) << 19) \| ((rgb & Int4(0x001C)) << 14)) \|
	(((rgb & Int4(0x07E0)) << 5) \| ((rgb & Int4(0x0600)) >> 1)) \|
	(((rgb & Int4(0xF800)) >> 8) \| ((rgb & Int4(0xE000)) >> 13));

	s += 4 * sBytes;
	d += 4 * dBytes;
	}
	break;
	default:
	ASSERT(false);
	break;
	}

	For(, x < width, x++)
	{
	switch(state.sourceFormat)
	{
	case VK_FORMAT_R8G8B8A8_UNORM:
	Pointer<Int>(d) = Pointer<Int>(s);
	break;
	case VK_FORMAT_B8G8R8A8_UNORM:
	{
	Int bgra = *Pointer<Int>(s);
	*Pointer<Int>(d) = ((bgra & Int(0x00FF0000)) >> 16) \|
	((bgra & Int(0x000000FF)) << 16) \|
	(bgra & Int(0xFF00FF00));
	}
	break;
	case VK_FORMAT_R16G16B16A16_UNORM:
	{
	Short4 c = *Pointer<UShort4>(s) >> 8;

	*Pointer<Int>(d) = Int(As<Int2>(PackUnsigned(c, c)));
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	{
	Int rgb = Int(*Pointer<Short>(s));

	*Pointer<Int>(d) = 0xFF000000 \|
	((rgb & 0x001F) << 19) \| ((rgb & 0x001C) << 14) \|
	((rgb & 0x07E0) << 5) \| ((rgb & 0x0600) >> 1) \|
	((rgb & 0xF800) >> 8) \| ((rgb & 0xE000) >> 13);
	}
	break;
	default:
	ASSERT(false);
	break;
	}

	s += sBytes;
	d += dBytes;
	}
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	{
	For(Int x = x0, x < width, x++)
	{
	switch(state.sourceFormat)
	{
	case VK_FORMAT_B8G8R8A8_UNORM:
	{
	Int c = *Pointer<Int>(s);

	*Pointer<Short>(d) = Short((c & 0x00F80000) >> 8 \|
	(c & 0x0000FC00) >> 5 \|
	(c & 0x000000F8) >> 3);
	}
	break;
	case VK_FORMAT_R8G8B8A8_UNORM:
	{
	Int c = *Pointer<Int>(s);

	*Pointer<Short>(d) = Short((c & 0x00F80000) >> 19 \|
	(c & 0x0000FC00) >> 5 \|
	(c & 0x000000F8) << 8);
	}
	break;
	case VK_FORMAT_R16G16B16A16_UNORM:
	{
	Short4 cc = *Pointer<UShort4>(s) >> 8;
	Int c = Int(As<Int2>(PackUnsigned(cc, cc)));

	*Pointer<Short>(d) = Short((c & 0x00F80000) >> 19 \|
	(c & 0x0000FC00) >> 5 \|
	(c & 0x000000F8) << 8);
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	Pointer<Short>(d) = Pointer<Short>(s);
	break;
	default:
	ASSERT(false);
	break;
	}

	s += sBytes;
	d += dBytes;
	}
	}
	break;
	default:
	ASSERT(false);
	break;
	}
	}

	if(state.cursorWidth > 0 && state.cursorHeight > 0)
	{
	Int x0 = *Pointer<Int>(cursor + OFFSET(Cursor,x));
	Int y0 = *Pointer<Int>(cursor + OFFSET(Cursor,y));

	For(Int y1 = 0, y1 < state.cursorHeight, y1++)
	{
	Int y = y0 + y1;

	If(y >= 0 && y < height)
	{
	Pointer<Byte> d = dst + y * dStride + x0 * dBytes;
	Pointer<Byte> s = src + y * sStride + x0 * sBytes;
	Pointer<Byte> c = Pointer<Pointer<Byte>>(cursor + OFFSET(Cursor,image)) + y1 state.cursorWidth * 4;

	For(Int x1 = 0, x1 < state.cursorWidth, x1++)
	{
	Int x = x0 + x1;

	If(x >= 0 && x < width)
	{
	blend(state, d, s, c);
	}

	c += 4;
	s += sBytes;
	d += dBytes;
	}
	}
	}
	}
	}

	return function("FrameBuffer");
	}

	void FrameBuffer::blend(const BlitState &state, const Pointer<Byte> &d, const Pointer<Byte> &s, const Pointer<Byte> &c)
	{
	Short4 c1;
	Short4 c2;

	c1 = Unpack(*Pointer<Byte4>(c));

	switch(state.sourceFormat)
	{
	case VK_FORMAT_B8G8R8A8_UNORM:
	c2 = Unpack(*Pointer<Byte4>(s));
	break;
	case VK_FORMAT_R8G8B8A8_UNORM:
	c2 = Swizzle(Unpack(*Pointer<Byte4>(s)), 0xC6);
	break;
	case VK_FORMAT_R16G16B16A16_UNORM:
	c2 = Swizzle(*Pointer<Short4>(s), 0xC6);
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	{
	Int rgb(*Pointer<Short>(s));
	rgb = 0xFF000000 \|
	((rgb & 0xF800) << 8) \| ((rgb & 0xE01F) << 3) \|
	((rgb & 0x07E0) << 5) \| ((rgb & 0x0600) >> 1) \|
	((rgb & 0x001C) >> 2);
	c2 = Unpack(As<Byte4>(rgb));
	}
	break;
	default:
	ASSERT(false);
	break;
	}

	c1 = As<Short4>(As<UShort4>(c1) >> 9);
	c2 = As<Short4>(As<UShort4>(c2) >> 9);

	Short4 alpha = Swizzle(c1, 0xFF) & Short4(0xFFFFu, 0xFFFFu, 0xFFFFu, 0x0000);

	c1 = (c1 - c2) * alpha;
	c1 = c1 >> 7;
	c1 = c1 + c2;
	c1 = c1 + c1;

	switch(state.destFormat)
	{
	case VK_FORMAT_B8G8R8A8_UNORM:
	*Pointer<Byte4>(d) = Byte4(PackUnsigned(c1, c1));
	break;
	case VK_FORMAT_R8G8B8A8_UNORM:
	case VK_FORMAT_R8G8B8A8_SRGB:
	{
	c1 = Swizzle(c1, 0xC6);

	*Pointer<Byte4>(d) = Byte4(PackUnsigned(c1, c1));
	}
	break;
	case VK_FORMAT_R5G6B5_UNORM_PACK16:
	{
	Int c = Int(As<Int2>(PackUnsigned(c1, c1)));

	*Pointer<Short>(d) = Short((c & 0x00F80000) >> 8 \|
	(c & 0x0000FC00) >> 5 \|
	(c & 0x000000F8) >> 3);
	}
	break;
	default:
	ASSERT(false);
	break;
	}
	}

	void FrameBuffer::threadFunction(void *parameters)
	{
	FrameBuffer frameBuffer = static_cast<FrameBuffer**>(parameters);

	while(!frameBuffer->terminate)
	{
	frameBuffer->blitEvent.wait();

	if(!frameBuffer->terminate)
	{
	frameBuffer->copyLocked();

	frameBuffer->syncEvent.signal();
	}
	}
	}
	}