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UnrealEngineUWP/Engine/Source/Developer/ShaderFormatOpenGL/Private/OpenGLShaderCompiler.cpp
Martin Mittring 29f89a390c Integrate from Orion 
CL 2704794 2704931 2704948 2704962 2705238 2706353 2700643 2705458

        Uniform Buffer layout name

and

more debug info for this and other bugs: OR-7159 CRASH: Client crashed at start of match in D3D11Commands.cpp

Adding OptionalData (key value pairs) to the shaders (to put shader name into the shader code for better debugging), affects all RHI, invalidate DDC key for all shaders, cleanup existing code (was adding 0/1/5 bytes and had to compensate in many areas)

OptionalData:
key is a char, value is up to 255 bytes, up to 64K in total

#platformnotify Josh.Adams

[CL 2706923 by Martin Mittring in Main branch]
2015-09-25 17:34:00 -04:00

1436 lines
47 KiB
C++
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// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
//
#include "ShaderFormatOpenGL.h"
#include "Core.h"
#if PLATFORM_WINDOWS
#include "AllowWindowsPlatformTypes.h"
#include "Windows/PreWindowsApi.h"
#include <objbase.h>
#include <assert.h>
#include <stdio.h>
#include "Windows/PostWindowsApi.h"
#include "Windows/MinWindows.h"
#include "HideWindowsPlatformTypes.h"
#endif
#include "ShaderPreprocessor.h"
#include "ShaderCompilerCommon.h"
#include "hlslcc.h"
#include "GlslBackend.h"
#if PLATFORM_WINDOWS
#include "AllowWindowsPlatformTypes.h"
#include <GL/glcorearb.h>
#include <GL/glext.h>
#include <GL/wglext.h>
#include "HideWindowsPlatformTypes.h"
#elif PLATFORM_LINUX
#define GL_GLEXT_PROTOTYPES 1
#include <GL/glcorearb.h>
#include <GL/glext.h>
#include "SDL.h"
GLAPI GLuint APIENTRY glCreateShader (GLenum type);
GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar* const *string, const GLint *length);
typedef SDL_Window* SDL_HWindow;
typedef SDL_GLContext SDL_HGLContext;
struct FPlatformOpenGLContext
{
SDL_HWindow hWnd;
SDL_HGLContext hGLContext; // this is a (void*) pointer
};
#elif PLATFORM_MAC
#include <OpenGL/OpenGL.h>
#include <OpenGL/gl3.h>
#include <OpenGL/gl3ext.h>
#ifndef GL_COMPUTE_SHADER
#define GL_COMPUTE_SHADER 0x91B9
#endif
#ifndef GL_TESS_EVALUATION_SHADER
#define GL_TESS_EVALUATION_SHADER 0x8E87
#endif
#ifndef GL_TESS_CONTROL_SHADER
#define GL_TESS_CONTROL_SHADER 0x8E88
#endif
#endif
#include "OpenGLUtil.h"
#include "OpenGLShaderResources.h"
DEFINE_LOG_CATEGORY_STATIC(LogOpenGLShaderCompiler, Log, All);
#define VALIDATE_GLSL_WITH_DRIVER 0
#define ENABLE_IMAGINATION_COMPILER 1
static FORCEINLINE bool IsES2Platform(GLSLVersion Version)
{
return (Version == GLSL_ES2 || Version == GLSL_150_ES2 || Version == GLSL_ES2_WEBGL || Version == GLSL_ES2_IOS || Version == GLSL_150_ES2_NOUB);
}
static FORCEINLINE bool IsPCES2Platform(GLSLVersion Version)
{
return (Version == GLSL_150_ES2 || Version == GLSL_150_ES2_NOUB || Version == GLSL_150_ES3_1);
}
// This function should match OpenGLShaderPlatformSeparable
static FORCEINLINE bool SupportsSeparateShaderObjects(GLSLVersion Version)
{
// Only desktop shader platforms can use separable shaders for now,
// the generated code relies on macros supplied at runtime to determine whether
// shaders may be separable and/or linked.
return Version == GLSL_150 || Version == GLSL_150_MAC || Version == GLSL_150_ES2 || Version == GLSL_150_ES2_NOUB || Version == GLSL_150_ES3_1 || Version == GLSL_430;
}
/*------------------------------------------------------------------------------
Shader compiling.
------------------------------------------------------------------------------*/
#if PLATFORM_WINDOWS
/** List all OpenGL entry points needed for shader compilation. */
#define ENUM_GL_ENTRYPOINTS(EnumMacro) \
EnumMacro(PFNGLCOMPILESHADERPROC,glCompileShader) \
EnumMacro(PFNGLCREATESHADERPROC,glCreateShader) \
EnumMacro(PFNGLDELETESHADERPROC,glDeleteShader) \
EnumMacro(PFNGLGETSHADERIVPROC,glGetShaderiv) \
EnumMacro(PFNGLGETSHADERINFOLOGPROC,glGetShaderInfoLog) \
EnumMacro(PFNGLSHADERSOURCEPROC,glShaderSource) \
EnumMacro(PFNGLDELETEBUFFERSPROC,glDeleteBuffers)
/** Define all GL functions. */
#define DEFINE_GL_ENTRYPOINTS(Type,Func) static Type Func = NULL;
ENUM_GL_ENTRYPOINTS(DEFINE_GL_ENTRYPOINTS);
/** This function is handled separately because it is used to get a real context. */
static PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
/** Platform specific OpenGL context. */
struct FPlatformOpenGLContext
{
HWND WindowHandle;
HDC DeviceContext;
HGLRC OpenGLContext;
};
/**
* A dummy wndproc.
*/
static LRESULT CALLBACK PlatformDummyGLWndproc(HWND hWnd, uint32 Message, WPARAM wParam, LPARAM lParam)
{
return DefWindowProc(hWnd, Message, wParam, lParam);
}
/**
* Initialize a pixel format descriptor for the given window handle.
*/
static void PlatformInitPixelFormatForDevice(HDC DeviceContext)
{
// Pixel format descriptor for the context.
PIXELFORMATDESCRIPTOR PixelFormatDesc;
FMemory::Memzero(PixelFormatDesc);
PixelFormatDesc.nSize = sizeof(PIXELFORMATDESCRIPTOR);
PixelFormatDesc.nVersion = 1;
PixelFormatDesc.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
PixelFormatDesc.iPixelType = PFD_TYPE_RGBA;
PixelFormatDesc.cColorBits = 32;
PixelFormatDesc.cDepthBits = 0;
PixelFormatDesc.cStencilBits = 0;
PixelFormatDesc.iLayerType = PFD_MAIN_PLANE;
// Set the pixel format and create the context.
int32 PixelFormat = ChoosePixelFormat(DeviceContext, &PixelFormatDesc);
if (!PixelFormat || !SetPixelFormat(DeviceContext, PixelFormat, &PixelFormatDesc))
{
UE_LOG(LogOpenGLShaderCompiler, Fatal,TEXT("Failed to set pixel format for device context."));
}
}
/**
* Create a dummy window used to construct OpenGL contexts.
*/
static void PlatformCreateDummyGLWindow(FPlatformOpenGLContext* OutContext)
{
const TCHAR* WindowClassName = TEXT("DummyGLToolsWindow");
// Register a dummy window class.
static bool bInitializedWindowClass = false;
if (!bInitializedWindowClass)
{
WNDCLASS wc;
bInitializedWindowClass = true;
FMemory::Memzero(wc);
wc.style = CS_OWNDC;
wc.lpfnWndProc = PlatformDummyGLWndproc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = NULL;
wc.hIcon = NULL;
wc.hCursor = NULL;
wc.hbrBackground = (HBRUSH)(COLOR_MENUTEXT);
wc.lpszMenuName = NULL;
wc.lpszClassName = WindowClassName;
ATOM ClassAtom = ::RegisterClass(&wc);
check(ClassAtom);
}
// Create a dummy window.
OutContext->WindowHandle = CreateWindowEx(
WS_EX_WINDOWEDGE,
WindowClassName,
NULL,
WS_POPUP,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, NULL, NULL);
check(OutContext->WindowHandle);
// Get the device context.
OutContext->DeviceContext = GetDC(OutContext->WindowHandle);
check(OutContext->DeviceContext);
PlatformInitPixelFormatForDevice(OutContext->DeviceContext);
}
/**
* Create a core profile OpenGL context.
*/
static void PlatformCreateOpenGLContextCore(FPlatformOpenGLContext* OutContext, int MajorVersion, int MinorVersion, HGLRC InParentContext)
{
check(wglCreateContextAttribsARB);
check(OutContext);
check(OutContext->DeviceContext);
int AttribList[] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, MajorVersion,
WGL_CONTEXT_MINOR_VERSION_ARB, MinorVersion,
WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB | WGL_CONTEXT_DEBUG_BIT_ARB,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0
};
OutContext->OpenGLContext = wglCreateContextAttribsARB(OutContext->DeviceContext, InParentContext, AttribList);
check(OutContext->OpenGLContext);
}
/**
* Make the context current.
*/
static void PlatformMakeGLContextCurrent(FPlatformOpenGLContext* Context)
{
check(Context && Context->OpenGLContext && Context->DeviceContext);
wglMakeCurrent(Context->DeviceContext, Context->OpenGLContext);
}
/**
* Initialize an OpenGL context so that shaders can be compiled.
*/
static void PlatformInitOpenGL(void*& ContextPtr, void*& PrevContextPtr, int InMajorVersion, int InMinorVersion)
{
static FPlatformOpenGLContext ShaderCompileContext = {0};
ContextPtr = (void*)wglGetCurrentDC();
PrevContextPtr = (void*)wglGetCurrentContext();
if (ShaderCompileContext.OpenGLContext == NULL && InMajorVersion && InMinorVersion)
{
PlatformCreateDummyGLWindow(&ShaderCompileContext);
// Disable warning C4191: 'type cast' : unsafe conversion from 'PROC' to 'XXX' while getting GL entry points.
#pragma warning(push)
#pragma warning(disable:4191)
if (wglCreateContextAttribsARB == NULL)
{
// Create a dummy context so that wglCreateContextAttribsARB can be initialized.
ShaderCompileContext.OpenGLContext = wglCreateContext(ShaderCompileContext.DeviceContext);
check(ShaderCompileContext.OpenGLContext);
PlatformMakeGLContextCurrent(&ShaderCompileContext);
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
check(wglCreateContextAttribsARB);
wglDeleteContext(ShaderCompileContext.OpenGLContext);
}
// Create a context so that remaining GL function pointers can be initialized.
PlatformCreateOpenGLContextCore(&ShaderCompileContext, InMajorVersion, InMinorVersion, /*InParentContext=*/ NULL);
check(ShaderCompileContext.OpenGLContext);
PlatformMakeGLContextCurrent(&ShaderCompileContext);
if (glCreateShader == NULL)
{
// Initialize all entry points.
#define GET_GL_ENTRYPOINTS(Type,Func) Func = (Type)wglGetProcAddress(#Func);
ENUM_GL_ENTRYPOINTS(GET_GL_ENTRYPOINTS);
// Check that all of the entry points have been initialized.
bool bFoundAllEntryPoints = true;
#define CHECK_GL_ENTRYPOINTS(Type,Func) if (Func == NULL) { bFoundAllEntryPoints = false; UE_LOG(LogOpenGLShaderCompiler, Warning, TEXT("Failed to find entry point for %s"), TEXT(#Func)); }
ENUM_GL_ENTRYPOINTS(CHECK_GL_ENTRYPOINTS);
checkf(bFoundAllEntryPoints, TEXT("Failed to find all OpenGL entry points."));
}
// Restore warning C4191.
#pragma warning(pop)
}
PlatformMakeGLContextCurrent(&ShaderCompileContext);
}
static void PlatformReleaseOpenGL(void* ContextPtr, void* PrevContextPtr)
{
wglMakeCurrent((HDC)ContextPtr, (HGLRC)PrevContextPtr);
}
#elif PLATFORM_LINUX
static void _PlatformCreateDummyGLWindow(FPlatformOpenGLContext *OutContext)
{
static bool bInitializedWindowClass = false;
// Create a dummy window.
OutContext->hWnd = SDL_CreateWindow(NULL,
0, 0, 1, 1,
SDL_WINDOW_OPENGL | SDL_WINDOW_BORDERLESS | SDL_WINDOW_HIDDEN | SDL_WINDOW_SKIP_TASKBAR );
}
static void _PlatformCreateOpenGLContextCore(FPlatformOpenGLContext* OutContext)
{
check(OutContext);
SDL_HWindow PrevWindow = SDL_GL_GetCurrentWindow();
SDL_HGLContext PrevContext = SDL_GL_GetCurrentContext();
OutContext->hGLContext = SDL_GL_CreateContext(OutContext->hWnd);
SDL_GL_MakeCurrent(PrevWindow, PrevContext);
}
static void _ContextMakeCurrent(SDL_HWindow hWnd, SDL_HGLContext hGLDC)
{
GLint Result = SDL_GL_MakeCurrent( hWnd, hGLDC );
check(!Result);
}
static void PlatformInitOpenGL(void*& ContextPtr, void*& PrevContextPtr, int InMajorVersion, int InMinorVersion)
{
static bool bInitialized = (SDL_GL_GetCurrentWindow() != NULL) && (SDL_GL_GetCurrentContext() != NULL);
if (!bInitialized)
{
check(InMajorVersion > 3 || (InMajorVersion == 3 && InMinorVersion >= 2));
if (SDL_WasInit(0) == 0)
{
SDL_Init(SDL_INIT_VIDEO);
}
else
{
Uint32 InitializedSubsystemsMask = SDL_WasInit(SDL_INIT_EVERYTHING);
if ((InitializedSubsystemsMask & SDL_INIT_VIDEO) == 0)
{
SDL_InitSubSystem(SDL_INIT_VIDEO);
}
}
if (SDL_GL_LoadLibrary(NULL))
{
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("Unable to dynamically load libGL: %s"), ANSI_TO_TCHAR(SDL_GetError()));
}
if (SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, InMajorVersion))
{
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("Failed to set GL major version: %s"), ANSI_TO_TCHAR(SDL_GetError()));
}
if (SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, InMinorVersion))
{
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("Failed to set GL minor version: %s"), ANSI_TO_TCHAR(SDL_GetError()));
}
if (SDL_GL_SetAttribute( SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG))
{
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("Failed to set GL flags: %s"), ANSI_TO_TCHAR(SDL_GetError()));
}
if (SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE))
{
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("Failed to set GL mask/profile: %s"), ANSI_TO_TCHAR(SDL_GetError()));
}
// Create a dummy context to verify opengl support.
FPlatformOpenGLContext DummyContext;
_PlatformCreateDummyGLWindow(&DummyContext);
_PlatformCreateOpenGLContextCore(&DummyContext);
if (DummyContext.hGLContext)
{
_ContextMakeCurrent(DummyContext.hWnd, DummyContext.hGLContext);
}
else
{
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("OpenGL %d.%d not supported by driver"), InMajorVersion, InMinorVersion);
return;
}
PrevContextPtr = NULL;
ContextPtr = DummyContext.hGLContext;
bInitialized = true;
}
PrevContextPtr = reinterpret_cast<void*>(SDL_GL_GetCurrentContext());
SDL_HGLContext NewContext = SDL_GL_CreateContext(SDL_GL_GetCurrentWindow());
SDL_GL_MakeCurrent(SDL_GL_GetCurrentWindow(), NewContext);
ContextPtr = reinterpret_cast<void*>(NewContext);
}
static void PlatformReleaseOpenGL(void* ContextPtr, void* PrevContextPtr)
{
SDL_GL_MakeCurrent(SDL_GL_GetCurrentWindow(), reinterpret_cast<SDL_HGLContext>(PrevContextPtr));
SDL_GL_DeleteContext(reinterpret_cast<SDL_HGLContext>(ContextPtr));
}
#elif PLATFORM_MAC
static void PlatformInitOpenGL(void*& ContextPtr, void*& PrevContextPtr, int InMajorVersion, int InMinorVersion)
{
check(InMajorVersion > 3 || (InMajorVersion == 3 && InMinorVersion >= 2));
CGLPixelFormatAttribute AttribList[] =
{
kCGLPFANoRecovery,
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute)kCGLOGLPVersion_3_2_Core,
(CGLPixelFormatAttribute)0
};
CGLPixelFormatObj PixelFormat;
GLint NumFormats = 0;
CGLError Error = CGLChoosePixelFormat(AttribList, &PixelFormat, &NumFormats);
check(Error == kCGLNoError);
CGLContextObj ShaderCompileContext;
Error = CGLCreateContext(PixelFormat, NULL, &ShaderCompileContext);
check(Error == kCGLNoError);
Error = CGLDestroyPixelFormat(PixelFormat);
check(Error == kCGLNoError);
PrevContextPtr = (void*)CGLGetCurrentContext();
Error = CGLSetCurrentContext(ShaderCompileContext);
check(Error == kCGLNoError);
ContextPtr = (void*)ShaderCompileContext;
}
static void PlatformReleaseOpenGL(void* ContextPtr, void* PrevContextPtr)
{
CGLContextObj ShaderCompileContext = (CGLContextObj)ContextPtr;
CGLContextObj PreviousShaderCompileContext = (CGLContextObj)PrevContextPtr;
CGLError Error;
Error = CGLSetCurrentContext(PreviousShaderCompileContext);
check(Error == kCGLNoError);
Error = CGLDestroyContext(ShaderCompileContext);
check(Error == kCGLNoError);
}
#endif
/** Map shader frequency -> GL shader type. */
GLenum GLFrequencyTable[] =
{
GL_VERTEX_SHADER, // SF_Vertex
GL_TESS_CONTROL_SHADER, // SF_Hull
GL_TESS_EVALUATION_SHADER, // SF_Domain
GL_FRAGMENT_SHADER, // SF_Pixel
GL_GEOMETRY_SHADER, // SF_Geometry
GL_COMPUTE_SHADER, // SF_Compute
};
static_assert(ARRAY_COUNT(GLFrequencyTable) == SF_NumFrequencies, "Frequency table size mismatch.");
/**
* Parse a GLSL error.
* @param OutErrors - Storage for shader compiler errors.
* @param InLine - A single line from the compile error log.
*/
void ParseGlslError(TArray<FShaderCompilerError>& OutErrors, const FString& InLine)
{
const TCHAR* ErrorPrefix = TEXT("error: 0:");
const TCHAR* p = *InLine;
if (FCString::Strnicmp(p, ErrorPrefix, 9) == 0)
{
FString ErrorMsg;
int32 LineNumber = 0;
p += FCString::Strlen(ErrorPrefix);
// Skip to a number, take that to be the line number.
while (*p && *p < TEXT('0') && *p > TEXT('9')) { p++; }
while (*p && *p >= TEXT('0') && *p <= TEXT('9'))
{
LineNumber = 10 * LineNumber + (*p++ - TEXT('0'));
}
// Skip to the next alphanumeric value, treat that as the error message.
while (*p && !FChar::IsAlnum(*p)) { p++; }
ErrorMsg = p;
// Generate a compiler error.
if (ErrorMsg.Len() > 0)
{
// Note that no mapping exists from the GLSL source to the original
// HLSL source.
FShaderCompilerError* CompilerError = new(OutErrors) FShaderCompilerError;
CompilerError->StrippedErrorMessage = FString::Printf(
TEXT("driver compile error(%d): %s"),
LineNumber,
*ErrorMsg
);
}
}
}
static TArray<ANSICHAR> ParseIdentifierANSI(const FString& Str)
{
TArray<ANSICHAR> Result;
Result.Reserve(Str.Len());
for (int32 Index = 0; Index < Str.Len(); ++Index)
{
Result.Add(FChar::ToLower((ANSICHAR)Str[Index]));
}
Result.Add('\0');
return Result;
}
static uint32 ParseNumber(const TCHAR* Str)
{
uint32 Num = 0;
while (*Str && *Str >= '0' && *Str <= '9')
{
Num = Num * 10 + *Str++ - '0';
}
return Num;
}
/**
* Construct the final microcode from the compiled and verified shader source.
* @param ShaderOutput - Where to store the microcode and parameter map.
* @param InShaderSource - GLSL source with input/output signature.
* @param SourceLen - The length of the GLSL source code.
*/
static void BuildShaderOutput(
FShaderCompilerOutput& ShaderOutput,
const FShaderCompilerInput& ShaderInput,
const ANSICHAR* InShaderSource,
int32 SourceLen,
GLSLVersion Version
)
{
const ANSICHAR* USFSource = InShaderSource;
CrossCompiler::FHlslccHeader CCHeader;
if (!CCHeader.Read(USFSource, SourceLen))
{
UE_LOG(LogOpenGLShaderCompiler, Error, TEXT("Bad hlslcc header found"));
}
if (*USFSource != '#')
{
UE_LOG(LogOpenGLShaderCompiler, Error, TEXT("Bad hlslcc header found! Missing '#'!"));
}
FOpenGLCodeHeader Header = {0};
FShaderParameterMap& ParameterMap = ShaderOutput.ParameterMap;
EShaderFrequency Frequency = (EShaderFrequency)ShaderOutput.Target.Frequency;
TBitArray<> UsedUniformBufferSlots;
UsedUniformBufferSlots.Init(false, 32);
// Write out the magic markers.
Header.GlslMarker = 0x474c534c;
switch (Frequency)
{
case SF_Vertex:
Header.FrequencyMarker = 0x5653;
break;
case SF_Pixel:
Header.FrequencyMarker = 0x5053;
break;
case SF_Geometry:
Header.FrequencyMarker = 0x4753;
break;
case SF_Hull:
Header.FrequencyMarker = 0x4853;
break;
case SF_Domain:
Header.FrequencyMarker = 0x4453;
break;
case SF_Compute:
Header.FrequencyMarker = 0x4353;
break;
default:
UE_LOG(LogOpenGLShaderCompiler, Fatal, TEXT("Invalid shader frequency: %d"), (int32)Frequency);
}
static const FString AttributePrefix = TEXT("in_ATTRIBUTE");
static const FString GL_Prefix = TEXT("gl_");
for (auto& Input : CCHeader.Inputs)
{
// Only process attributes for vertex shaders.
if (Frequency == SF_Vertex && Input.Name.StartsWith(AttributePrefix))
{
int32 AttributeIndex = ParseNumber(*Input.Name + AttributePrefix.Len());
Header.Bindings.InOutMask |= (1 << AttributeIndex);
}
// Record user-defined input varyings
else if (!Input.Name.StartsWith(GL_Prefix))
{
FOpenGLShaderVarying Var;
Var.Location = Input.Index;
Var.Varying = ParseIdentifierANSI(Input.Name);
Header.Bindings.InputVaryings.Add(Var);
}
}
// Generate vertex attribute remapping table.
// This is used on devices where GL_MAX_VERTEX_ATTRIBS < 16
if (Frequency == SF_Vertex)
{
uint32 AttributeMask = Header.Bindings.InOutMask;
int32 NextAttributeSlot = 0;
Header.Bindings.VertexRemappedMask = 0;
for (int32 AttributeIndex = 0; AttributeIndex < 16; AttributeIndex++, AttributeMask >>= 1)
{
if (AttributeMask & 0x1)
{
Header.Bindings.VertexRemappedMask |= (1 << NextAttributeSlot);
Header.Bindings.VertexAttributeRemap[AttributeIndex] = NextAttributeSlot++;
}
else
{
Header.Bindings.VertexAttributeRemap[AttributeIndex] = -1;
}
}
}
static const FString TargetPrefix = "out_Target";
static const FString GL_FragDepth = "gl_FragDepth";
for (auto& Output : CCHeader.Outputs)
{
// Only targets for pixel shaders must be tracked.
if (Frequency == SF_Pixel && Output.Name.StartsWith(TargetPrefix))
{
uint8 TargetIndex = ParseNumber(*Output.Name + TargetPrefix.Len());
Header.Bindings.InOutMask |= (1 << TargetIndex);
}
// Only depth writes for pixel shaders must be tracked.
else if (Frequency == SF_Pixel && Output.Name.Equals(GL_FragDepth))
{
Header.Bindings.InOutMask |= 0x8000;
}
// Record user-defined output varyings
else if (!Output.Name.StartsWith(GL_Prefix))
{
FOpenGLShaderVarying Var;
Var.Location = Output.Index;
Var.Varying = ParseIdentifierANSI(Output.Name);
Header.Bindings.OutputVaryings.Add(Var);
}
}
// Then 'normal' uniform buffers.
for (auto& UniformBlock : CCHeader.UniformBlocks)
{
uint16 UBIndex = UniformBlock.Index;
check(UBIndex == Header.Bindings.NumUniformBuffers);
UsedUniformBufferSlots[UBIndex] = true;
ParameterMap.AddParameterAllocation(*UniformBlock.Name, Header.Bindings.NumUniformBuffers++, 0, 0);
}
const uint16 BytesPerComponent = 4;
// Packed global uniforms
TMap<ANSICHAR, uint16> PackedGlobalArraySize;
for (auto& PackedGlobal : CCHeader.PackedGlobals)
{
ParameterMap.AddParameterAllocation(
*PackedGlobal.Name,
PackedGlobal.PackedType,
PackedGlobal.Offset * BytesPerComponent,
PackedGlobal.Count * BytesPerComponent
);
uint16& Size = PackedGlobalArraySize.FindOrAdd(PackedGlobal.PackedType);
Size = FMath::Max<uint16>(BytesPerComponent * (PackedGlobal.Offset + PackedGlobal.Count), Size);
}
// Packed Uniform Buffers
TMap<int, TMap<ANSICHAR, uint16> > PackedUniformBuffersSize;
for (auto& PackedUB : CCHeader.PackedUBs)
{
check(PackedUB.Attribute.Index == Header.Bindings.NumUniformBuffers);
UsedUniformBufferSlots[PackedUB.Attribute.Index] = true;
ParameterMap.AddParameterAllocation(*PackedUB.Attribute.Name, Header.Bindings.NumUniformBuffers++, 0, 0);
// Nothing else...
//for (auto& Member : PackedUB.Members)
//{
//}
}
// Packed Uniform Buffers copy lists & setup sizes for each UB/Precision entry
enum EFlattenUBState
{
Unknown,
GroupedUBs,
FlattenedUBs,
};
EFlattenUBState UBState = Unknown;
for (auto& PackedUBCopy : CCHeader.PackedUBCopies)
{
CrossCompiler::FUniformBufferCopyInfo CopyInfo;
CopyInfo.SourceUBIndex = PackedUBCopy.SourceUB;
CopyInfo.SourceOffsetInFloats = PackedUBCopy.SourceOffset;
CopyInfo.DestUBIndex = PackedUBCopy.DestUB;
CopyInfo.DestUBTypeName = PackedUBCopy.DestPackedType;
CopyInfo.DestUBTypeIndex = CrossCompiler::PackedTypeNameToTypeIndex(CopyInfo.DestUBTypeName);
CopyInfo.DestOffsetInFloats = PackedUBCopy.DestOffset;
CopyInfo.SizeInFloats = PackedUBCopy.Count;
Header.UniformBuffersCopyInfo.Add(CopyInfo);
auto& UniformBufferSize = PackedUniformBuffersSize.FindOrAdd(CopyInfo.DestUBIndex);
uint16& Size = UniformBufferSize.FindOrAdd(CopyInfo.DestUBTypeName);
Size = FMath::Max<uint16>(BytesPerComponent * (CopyInfo.DestOffsetInFloats + CopyInfo.SizeInFloats), Size);
check(UBState == Unknown || UBState == GroupedUBs);
UBState = GroupedUBs;
}
for (auto& PackedUBCopy : CCHeader.PackedUBGlobalCopies)
{
CrossCompiler::FUniformBufferCopyInfo CopyInfo;
CopyInfo.SourceUBIndex = PackedUBCopy.SourceUB;
CopyInfo.SourceOffsetInFloats = PackedUBCopy.SourceOffset;
CopyInfo.DestUBIndex = PackedUBCopy.DestUB;
CopyInfo.DestUBTypeName = PackedUBCopy.DestPackedType;
CopyInfo.DestUBTypeIndex = CrossCompiler::PackedTypeNameToTypeIndex(CopyInfo.DestUBTypeName);
CopyInfo.DestOffsetInFloats = PackedUBCopy.DestOffset;
CopyInfo.SizeInFloats = PackedUBCopy.Count;
Header.UniformBuffersCopyInfo.Add(CopyInfo);
uint16& Size = PackedGlobalArraySize.FindOrAdd(CopyInfo.DestUBTypeName);
Size = FMath::Max<uint16>(BytesPerComponent * (CopyInfo.DestOffsetInFloats + CopyInfo.SizeInFloats), Size);
check(UBState == Unknown || UBState == FlattenedUBs);
UBState = FlattenedUBs;
}
Header.Bindings.bFlattenUB = (UBState == FlattenedUBs);
// Setup Packed Array info
Header.Bindings.PackedGlobalArrays.Reserve(PackedGlobalArraySize.Num());
for (auto Iterator = PackedGlobalArraySize.CreateIterator(); Iterator; ++Iterator)
{
ANSICHAR TypeName = Iterator.Key();
uint16 Size = Iterator.Value();
Size = (Size + 0xf) & (~0xf);
CrossCompiler::FPackedArrayInfo Info;
Info.Size = Size;
Info.TypeName = TypeName;
Info.TypeIndex = CrossCompiler::PackedTypeNameToTypeIndex(TypeName);
Header.Bindings.PackedGlobalArrays.Add(Info);
}
// Setup Packed Uniform Buffers info
Header.Bindings.PackedUniformBuffers.Reserve(PackedUniformBuffersSize.Num());
for (auto Iterator = PackedUniformBuffersSize.CreateIterator(); Iterator; ++Iterator)
{
int BufferIndex = Iterator.Key();
auto& ArraySizes = Iterator.Value();
TArray<CrossCompiler::FPackedArrayInfo> InfoArray;
InfoArray.Reserve(ArraySizes.Num());
for (auto IterSizes = ArraySizes.CreateIterator(); IterSizes; ++IterSizes)
{
ANSICHAR TypeName = IterSizes.Key();
uint16 Size = IterSizes.Value();
Size = (Size + 0xf) & (~0xf);
CrossCompiler::FPackedArrayInfo Info;
Info.Size = Size;
Info.TypeName = TypeName;
Info.TypeIndex = CrossCompiler::PackedTypeNameToTypeIndex(TypeName);
InfoArray.Add(Info);
}
Header.Bindings.PackedUniformBuffers.Add(InfoArray);
}
// Then samplers.
for (auto& Sampler : CCHeader.Samplers)
{
ParameterMap.AddParameterAllocation(
*Sampler.Name,
0,
Sampler.Offset,
Sampler.Count
);
Header.Bindings.NumSamplers = FMath::Max<uint8>(
Header.Bindings.NumSamplers,
Sampler.Offset + Sampler.Count
);
for (auto& SamplerState : Sampler.SamplerStates)
{
ParameterMap.AddParameterAllocation(
*SamplerState,
0,
Sampler.Offset,
Sampler.Count
);
}
}
// Then UAVs (images in GLSL)
for (auto& UAV : CCHeader.UAVs)
{
ParameterMap.AddParameterAllocation(
*UAV.Name,
0,
UAV.Offset,
UAV.Count
);
Header.Bindings.NumUAVs = FMath::Max<uint8>(
Header.Bindings.NumSamplers,
UAV.Offset + UAV.Count
);
}
Header.ShaderName = CCHeader.Name;
// Build the SRT for this shader.
{
// Build the generic SRT for this shader.
FShaderResourceTable GenericSRT;
BuildResourceTableMapping(ShaderInput.Environment.ResourceTableMap, ShaderInput.Environment.ResourceTableLayoutHashes, UsedUniformBufferSlots, ShaderOutput.ParameterMap, GenericSRT);
// Copy over the bits indicating which resource tables are active.
Header.Bindings.ShaderResourceTable.ResourceTableBits = GenericSRT.ResourceTableBits;
Header.Bindings.ShaderResourceTable.ResourceTableLayoutHashes = GenericSRT.ResourceTableLayoutHashes;
// Now build our token streams.
BuildResourceTableTokenStream(GenericSRT.TextureMap, GenericSRT.MaxBoundResourceTable, Header.Bindings.ShaderResourceTable.TextureMap);
BuildResourceTableTokenStream(GenericSRT.ShaderResourceViewMap, GenericSRT.MaxBoundResourceTable, Header.Bindings.ShaderResourceTable.ShaderResourceViewMap);
BuildResourceTableTokenStream(GenericSRT.SamplerMap, GenericSRT.MaxBoundResourceTable, Header.Bindings.ShaderResourceTable.SamplerMap);
BuildResourceTableTokenStream(GenericSRT.UnorderedAccessViewMap, GenericSRT.MaxBoundResourceTable, Header.Bindings.ShaderResourceTable.UnorderedAccessViewMap);
}
const int32 MaxSamplers = GetFeatureLevelMaxTextureSamplers(GetMaxSupportedFeatureLevel((EShaderPlatform)ShaderOutput.Target.Platform));
if (Header.Bindings.NumSamplers > MaxSamplers)
{
ShaderOutput.bSucceeded = false;
FShaderCompilerError* NewError = new(ShaderOutput.Errors) FShaderCompilerError();
NewError->StrippedErrorMessage =
FString::Printf(TEXT("shader uses %d samplers exceeding the limit of %d"),
Header.Bindings.NumSamplers, MaxSamplers);
}
else
{
// Write out the header and shader source code.
FMemoryWriter Ar(ShaderOutput.ShaderCode.GetWriteAccess(), true);
Ar << Header;
Ar.Serialize((void*)USFSource, SourceLen + 1 - (USFSource - InShaderSource));
// store data we can pickup later with ShaderCode.FindOptionalData('n'), could be removed for shipping
ShaderOutput.ShaderCode.AddOptionalData('n', TCHAR_TO_UTF8(*ShaderInput.GenerateShaderName()));
ShaderOutput.NumInstructions = 0;
ShaderOutput.NumTextureSamplers = Header.Bindings.NumSamplers;
ShaderOutput.bSucceeded = true;
}
}
static void OpenGLVersionFromGLSLVersion(GLSLVersion InVersion, int& OutMajorVersion, int& OutMinorVersion)
{
switch(InVersion)
{
case GLSL_150:
case GLSL_150_MAC:
OutMajorVersion = 3;
OutMinorVersion = 2;
break;
case GLSL_310_ES_EXT:
case GLSL_430:
OutMajorVersion = 4;
OutMinorVersion = 3;
break;
case GLSL_150_ES2:
case GLSL_150_ES2_NOUB:
case GLSL_150_ES3_1:
OutMajorVersion = 3;
OutMinorVersion = 2;
break;
case GLSL_ES2_IOS:
case GLSL_ES2_WEBGL:
case GLSL_ES2:
OutMajorVersion = 0;
OutMinorVersion = 0;
break;
default:
// Invalid enum
check(0);
OutMajorVersion = 0;
OutMinorVersion = 0;
break;
}
}
static const TCHAR* GetGLSLES2CompilerExecutable(bool bNDACompiler)
{
// Unfortunately no env var is set to handle install path
return (bNDACompiler
? TEXT("C:\\Imagination\\PowerVR\\GraphicsSDK\\Compilers\\OGLES\\Windows_x86_32\\glslcompiler_sgx543_nda.exe")
: TEXT("C:\\Imagination\\PowerVR\\GraphicsSDK\\Compilers\\OGLES\\Windows_x86_32\\glslcompiler_sgx543.exe"));
}
static FString CreateGLSLES2CompilerArguments(const FString& ShaderFile, const FString& OutputFile, EHlslShaderFrequency Frequency, bool bNDACompiler)
{
const TCHAR* FrequencySwitch = TEXT("");
switch (Frequency)
{
case HSF_PixelShader:
FrequencySwitch = TEXT(" -f");
break;
case HSF_VertexShader:
FrequencySwitch = TEXT(" -v");
break;
default:
return TEXT("");
}
FString Arguments = FString::Printf(TEXT("%s %s %s -profile -perfsim"), *FPaths::GetCleanFilename(ShaderFile), *FPaths::GetCleanFilename(OutputFile), FrequencySwitch);
if (bNDACompiler)
{
Arguments += " -disasm";
}
return Arguments;
}
static FString CreateCommandLineGLSLES2(const FString& ShaderFile, const FString& OutputFile, GLSLVersion Version, EHlslShaderFrequency Frequency, bool bNDACompiler)
{
if (Version != GLSL_ES2 && Version != GLSL_ES2_WEBGL && Version != GLSL_ES2_IOS)
{
return TEXT("");
}
FString CmdLine = FString(GetGLSLES2CompilerExecutable(bNDACompiler)) + TEXT(" ") + CreateGLSLES2CompilerArguments(ShaderFile, OutputFile, Frequency, bNDACompiler);
CmdLine += FString(LINE_TERMINATOR) + TEXT("pause");
return CmdLine;
}
/** Precompile a glsl shader for ES2. */
static void PrecompileGLSLES2(FShaderCompilerOutput& ShaderOutput, const FShaderCompilerInput& ShaderInput, const ANSICHAR* ShaderSource, EHlslShaderFrequency Frequency)
{
const TCHAR* CompilerExecutableName = GetGLSLES2CompilerExecutable(false);
const int32 SourceLen = FCStringAnsi::Strlen(ShaderSource);
const bool bCompilerExecutableExists = FPaths::FileExists(CompilerExecutableName);
// Using the debug info path to write out the files to disk for the PVR shader compiler
if (ShaderInput.DumpDebugInfoPath != TEXT("") && bCompilerExecutableExists)
{
const FString GLSLSourceFile = (ShaderInput.DumpDebugInfoPath / TEXT("GLSLSource.txt"));
bool bSavedSuccessfully = false;
{
FArchive* Ar = IFileManager::Get().CreateFileWriter(*GLSLSourceFile, FILEWRITE_EvenIfReadOnly);
// Save the ansi file to disk so it can be used as input to the PVR shader compiler
if (Ar)
{
bSavedSuccessfully = true;
// @todo: Patch the code so that textureCubeLodEXT gets converted to textureCubeLod to workaround PowerVR issues
const ANSICHAR* VersionString = FCStringAnsi::Strfind(ShaderSource, "#version 100");
check(VersionString);
VersionString += 12; // strlen("# version 100");
Ar->Serialize((void*)ShaderSource, (VersionString - ShaderSource) * sizeof(ANSICHAR));
const char* PVRWorkaround = "\n#ifndef textureCubeLodEXT\n#define textureCubeLodEXT textureCubeLod\n#endif\n";
Ar->Serialize((void*)PVRWorkaround, FCStringAnsi::Strlen(PVRWorkaround));
Ar->Serialize((void*)VersionString, (SourceLen - (VersionString - ShaderSource)) * sizeof(ANSICHAR));
delete Ar;
}
}
if (bSavedSuccessfully && ENABLE_IMAGINATION_COMPILER)
{
const FString Arguments = CreateGLSLES2CompilerArguments(GLSLSourceFile, TEXT("ASM.txt"), Frequency, false);
FString StdOut;
FString StdErr;
int32 ReturnCode = 0;
// Run the PowerVR shader compiler and wait for completion
FPlatformProcess::ExecProcess(GetGLSLES2CompilerExecutable(false), *Arguments, &ReturnCode, &StdOut, &StdErr);
if (ReturnCode >= 0)
{
ShaderOutput.bSucceeded = true;
ShaderOutput.Target = ShaderInput.Target;
BuildShaderOutput(ShaderOutput, ShaderInput, ShaderSource, SourceLen, GLSL_ES2);
// Parse the cycle count
const int32 CycleCountStringLength = FPlatformString::Strlen(TEXT("Cycle count: "));
const int32 CycleCountIndex = StdOut.Find(TEXT("Cycle count: "));
if (CycleCountIndex != INDEX_NONE && CycleCountIndex + CycleCountStringLength < StdOut.Len())
{
const int32 CycleCountEndIndex = StdOut.Find(TEXT("\n"), ESearchCase::IgnoreCase, ESearchDir::FromStart, CycleCountIndex + CycleCountStringLength);
if (CycleCountEndIndex != INDEX_NONE)
{
const FString InstructionSubstring = StdOut.Mid(CycleCountIndex + CycleCountStringLength, CycleCountEndIndex - (CycleCountIndex + CycleCountStringLength));
ShaderOutput.NumInstructions = FCString::Atoi(*InstructionSubstring);
}
}
}
else
{
ShaderOutput.bSucceeded = false;
FShaderCompilerError* NewError = new(ShaderOutput.Errors) FShaderCompilerError();
// Print the name of the generated glsl file so we can open it with a double click in the VS.Net output window
NewError->StrippedErrorMessage = FString::Printf(TEXT("%s \nPVR SDK glsl compiler for SGX543: %s"), *GLSLSourceFile, *StdOut);
}
}
else
{
ShaderOutput.bSucceeded = true;
ShaderOutput.Target = ShaderInput.Target;
BuildShaderOutput(ShaderOutput, ShaderInput, ShaderSource, SourceLen, GLSL_ES2);
}
}
else
{
ShaderOutput.bSucceeded = true;
ShaderOutput.Target = ShaderInput.Target;
BuildShaderOutput(ShaderOutput, ShaderInput, ShaderSource, SourceLen, GLSL_ES2);
}
}
/**
* Precompile a GLSL shader.
* @param ShaderOutput - The precompiled shader.
* @param ShaderInput - The shader input.
* @param InPreprocessedShader - The preprocessed source code.
*/
static void PrecompileShader(FShaderCompilerOutput& ShaderOutput, const FShaderCompilerInput& ShaderInput, const ANSICHAR* ShaderSource, GLSLVersion Version, EHlslShaderFrequency Frequency)
{
check(ShaderInput.Target.Frequency < SF_NumFrequencies);
// Lookup the GL shader type.
GLenum GLFrequency = GLFrequencyTable[ShaderInput.Target.Frequency];
if (GLFrequency == GL_NONE)
{
ShaderOutput.bSucceeded = false;
FShaderCompilerError* NewError = new(ShaderOutput.Errors) FShaderCompilerError();
NewError->StrippedErrorMessage = FString::Printf(TEXT("%s shaders not supported for use in OpenGL."), CrossCompiler::GetFrequencyName((EShaderFrequency)ShaderInput.Target.Frequency));
return;
}
if (Version == GLSL_ES2 || Version == GLSL_ES2_WEBGL || Version == GLSL_ES2_IOS)
{
PrecompileGLSLES2(ShaderOutput, ShaderInput, ShaderSource, Frequency);
}
else
{
// Create the shader with the preprocessed source code.
void* ContextPtr;
void* PrevContextPtr;
int MajorVersion = 0;
int MinorVersion = 0;
OpenGLVersionFromGLSLVersion(Version, MajorVersion, MinorVersion);
PlatformInitOpenGL(ContextPtr, PrevContextPtr, MajorVersion, MinorVersion);
GLint SourceLen = FCStringAnsi::Strlen(ShaderSource);
GLuint Shader = glCreateShader(GLFrequency);
{
const GLchar* SourcePtr = ShaderSource;
glShaderSource(Shader, 1, &SourcePtr, &SourceLen);
}
// Compile and get results.
glCompileShader(Shader);
{
GLint CompileStatus;
glGetShaderiv(Shader, GL_COMPILE_STATUS, &CompileStatus);
if (CompileStatus == GL_TRUE)
{
ShaderOutput.Target = ShaderInput.Target;
BuildShaderOutput(
ShaderOutput,
ShaderInput,
ShaderSource,
(int32)SourceLen,
Version
);
}
else
{
GLint LogLength;
glGetShaderiv(Shader, GL_INFO_LOG_LENGTH, &LogLength);
if (LogLength > 1)
{
TArray<ANSICHAR> RawCompileLog;
FString CompileLog;
TArray<FString> LogLines;
RawCompileLog.Empty(LogLength);
RawCompileLog.AddZeroed(LogLength);
glGetShaderInfoLog(Shader, LogLength, /*OutLength=*/ NULL, RawCompileLog.GetData());
CompileLog = ANSI_TO_TCHAR(RawCompileLog.GetData());
CompileLog.ParseIntoArray(LogLines, TEXT("\n"), true);
for (int32 Line = 0; Line < LogLines.Num(); ++Line)
{
ParseGlslError(ShaderOutput.Errors, LogLines[Line]);
}
if (ShaderOutput.Errors.Num() == 0)
{
FShaderCompilerError* NewError = new(ShaderOutput.Errors) FShaderCompilerError();
NewError->StrippedErrorMessage = FString::Printf(
TEXT("GLSL source:\n%sGL compile log: %s\n"),
ANSI_TO_TCHAR(ShaderSource),
ANSI_TO_TCHAR(RawCompileLog.GetData())
);
}
}
else
{
FShaderCompilerError* NewError = new(ShaderOutput.Errors) FShaderCompilerError();
NewError->StrippedErrorMessage = TEXT("Shader compile failed without errors.");
}
ShaderOutput.bSucceeded = false;
}
}
glDeleteShader(Shader);
PlatformReleaseOpenGL(ContextPtr, PrevContextPtr);
}
}
/*------------------------------------------------------------------------------
External interface.
------------------------------------------------------------------------------*/
static FString CreateCrossCompilerBatchFile( const FString& ShaderFile, const FString& OutputFile, const FString& EntryPoint, EHlslShaderFrequency Frequency, GLSLVersion Version, uint32 CCFlags )
{
const TCHAR* VersionSwitch = TEXT("");
switch (Version)
{
case GLSL_150:
case GLSL_150_ES2:
case GLSL_150_ES3_1:
case GLSL_150_ES2_NOUB:
VersionSwitch = TEXT(" -gl3");
break;
case GLSL_150_MAC:
VersionSwitch = TEXT(" -gl3 -mac");
break;
case GLSL_310_ES_EXT:
VersionSwitch = TEXT(" -es31ext");
break;
case GLSL_430:
VersionSwitch = TEXT(" -gl4");
break;
case GLSL_ES2:
case GLSL_ES2_WEBGL:
case GLSL_ES2_IOS:
VersionSwitch = TEXT(" -es2");
break;
default:
return TEXT("");
}
return CrossCompiler::CreateBatchFileContents(ShaderFile, OutputFile, Frequency, EntryPoint, VersionSwitch, CCFlags, TEXT(""));
}
/**
* Compile a shader for OpenGL on Windows.
* @param Input - The input shader code and environment.
* @param Output - Contains shader compilation results upon return.
*/
void CompileShader_Windows_OGL(const FShaderCompilerInput& Input,FShaderCompilerOutput& Output,const FString& WorkingDirectory, GLSLVersion Version)
{
FString PreprocessedShader;
FShaderCompilerDefinitions AdditionalDefines;
EHlslCompileTarget HlslCompilerTarget = HCT_InvalidTarget;
ECompilerFlags PlatformFlowControl = CFLAG_AvoidFlowControl;
AdditionalDefines.SetDefine(TEXT("COMPILER_HLSLCC"), 1);
switch (Version)
{
case GLSL_310_ES_EXT:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("ES31_AEP_PROFILE"), 1);
AdditionalDefines.SetDefine(TEXT("GL4_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelES3_1Ext;
break;
case GLSL_430:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("GL4_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelSM5;
break;
case GLSL_150:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("GL3_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelSM4;
break;
case GLSL_150_MAC:
AdditionalDefines.SetDefine(TEXT("MAC"), 1);
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("GL3_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelSM4;
// On OS X it is always better to leave the flow control statements in the GLSL & let the GLSL->GPU compilers
// optimise it appropriately for each GPU. This gives a performance gain on AMD & Intel and is neutral on Nvidia.
PlatformFlowControl = CFLAG_PreferFlowControl;
break;
case GLSL_ES2_WEBGL:
AdditionalDefines.SetDefine(TEXT("WEBGL"), 1);
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL_ES2"), 1);
AdditionalDefines.SetDefine(TEXT("ES2_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelES2;
AdditionalDefines.SetDefine(TEXT("row_major"), TEXT(""));
break;
case GLSL_ES2_IOS:
AdditionalDefines.SetDefine(TEXT("IOS"), 1);
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL_ES2"), 1);
AdditionalDefines.SetDefine(TEXT("ES2_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelES2;
AdditionalDefines.SetDefine(TEXT("row_major"), TEXT(""));
break;
case GLSL_ES2:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL_ES2"), 1);
AdditionalDefines.SetDefine(TEXT("ES2_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelES2;
AdditionalDefines.SetDefine(TEXT("row_major"), TEXT(""));
break;
case GLSL_150_ES2:
case GLSL_150_ES2_NOUB:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("ES2_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelSM4;
AdditionalDefines.SetDefine(TEXT("row_major"), TEXT(""));
break;
case GLSL_150_ES3_1:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("ES3_1_PROFILE"), 1);
HlslCompilerTarget = HCT_FeatureLevelSM4;
AdditionalDefines.SetDefine(TEXT("row_major"), TEXT(""));
break;
default:
check(0);
}
const bool bDumpDebugInfo = (Input.DumpDebugInfoPath != TEXT("") && IFileManager::Get().DirectoryExists(*Input.DumpDebugInfoPath));
if(Input.Environment.CompilerFlags.Contains(CFLAG_AvoidFlowControl) || PlatformFlowControl == CFLAG_AvoidFlowControl)
{
AdditionalDefines.SetDefine(TEXT("COMPILER_SUPPORTS_ATTRIBUTES"), (uint32)1);
}
else
{
AdditionalDefines.SetDefine(TEXT("COMPILER_SUPPORTS_ATTRIBUTES"), (uint32)0);
}
if (PreprocessShader(PreprocessedShader, Output, Input, AdditionalDefines))
{
char* GlslShaderSource = NULL;
char* ErrorLog = NULL;
const bool bIsSM5 = Version == GLSL_430 || Version == GLSL_310_ES_EXT;
const EHlslShaderFrequency FrequencyTable[] =
{
HSF_VertexShader,
bIsSM5 ? HSF_HullShader : HSF_InvalidFrequency,
bIsSM5 ? HSF_DomainShader : HSF_InvalidFrequency,
HSF_PixelShader,
IsES2Platform(Version) ? HSF_InvalidFrequency : HSF_GeometryShader,
bIsSM5 ? HSF_ComputeShader : HSF_InvalidFrequency
};
const EHlslShaderFrequency Frequency = FrequencyTable[Input.Target.Frequency];
if (Frequency == HSF_InvalidFrequency)
{
Output.bSucceeded = false;
FShaderCompilerError* NewError = new(Output.Errors) FShaderCompilerError();
NewError->StrippedErrorMessage = FString::Printf(
TEXT("%s shaders not supported for use in OpenGL."),
CrossCompiler::GetFrequencyName((EShaderFrequency)Input.Target.Frequency)
);
return;
}
// This requires removing the HLSLCC_NoPreprocess flag later on!
if (!RemoveUniformBuffersFromSource(PreprocessedShader))
{
return;
}
// Write out the preprocessed file and a batch file to compile it if requested (DumpDebugInfoPath is valid)
if (bDumpDebugInfo)
{
FArchive* FileWriter = IFileManager::Get().CreateFileWriter(*(Input.DumpDebugInfoPath / Input.SourceFilename + TEXT(".usf")));
if (FileWriter)
{
auto AnsiSourceFile = StringCast<ANSICHAR>(*PreprocessedShader);
FileWriter->Serialize((ANSICHAR*)AnsiSourceFile.Get(), AnsiSourceFile.Length());
FileWriter->Close();
delete FileWriter;
}
}
uint32 CCFlags = HLSLCC_NoPreprocess | HLSLCC_PackUniforms | HLSLCC_DX11ClipSpace;
if (IsES2Platform(Version) && !IsPCES2Platform(Version))
{
CCFlags |= HLSLCC_FlattenUniformBuffers | HLSLCC_FlattenUniformBufferStructures;
// Currently only enabled for ES2, as there are still features to implement for SM4+ (atomics, global store, UAVs, etc)
CCFlags |= HLSLCC_ApplyCommonSubexpressionElimination;
}
if (Version == GLSL_150_ES2_NOUB)
{
CCFlags |= HLSLCC_FlattenUniformBuffers | HLSLCC_FlattenUniformBufferStructures;
}
if (SupportsSeparateShaderObjects(Version))
{
CCFlags |= HLSLCC_SeparateShaderObjects;
}
if (bDumpDebugInfo)
{
const FString GLSLFile = (Input.DumpDebugInfoPath / TEXT("Output.glsl"));
const FString USFFile = (Input.DumpDebugInfoPath / Input.SourceFilename) + TEXT(".usf");
const FString CCBatchFileContents = CreateCrossCompilerBatchFile(USFFile, GLSLFile, *Input.EntryPointName, Frequency, Version, CCFlags);
if (!CCBatchFileContents.IsEmpty())
{
const TCHAR * ScriptName = PLATFORM_WINDOWS ? TEXT("CrossCompile.bat") : TEXT("CrossCompile.sh");
FFileHelper::SaveStringToFile(CCBatchFileContents, *(Input.DumpDebugInfoPath / ScriptName));
}
}
// Required as we added the RemoveUniformBuffersFromSource() function (the cross-compiler won't be able to interpret comments w/o a preprocessor)
CCFlags &= ~HLSLCC_NoPreprocess;
FGlslCodeBackend GlslBackEnd(CCFlags, HlslCompilerTarget);
FGlslLanguageSpec GlslLanguageSpec(IsES2Platform(Version) && !IsPCES2Platform(Version));
int32 Result = 0;
FHlslCrossCompilerContext CrossCompilerContext(CCFlags, Frequency, HlslCompilerTarget);
if (CrossCompilerContext.Init(TCHAR_TO_ANSI(*Input.SourceFilename), &GlslLanguageSpec))
{
Result = CrossCompilerContext.Run(
TCHAR_TO_ANSI(*PreprocessedShader),
TCHAR_TO_ANSI(*Input.EntryPointName),
&GlslBackEnd,
&GlslShaderSource,
&ErrorLog
) ? 1 : 0;
}
if (Result != 0)
{
int32 GlslSourceLen = GlslShaderSource ? FCStringAnsi::Strlen(GlslShaderSource) : 0;
if (bDumpDebugInfo)
{
const FString GLSLFile = (Input.DumpDebugInfoPath / TEXT("Output.glsl"));
const FString GLBatchFileContents = CreateCommandLineGLSLES2(GLSLFile, (Input.DumpDebugInfoPath / TEXT("Output.asm")), Version, Frequency, false);
if (!GLBatchFileContents.IsEmpty())
{
FFileHelper::SaveStringToFile(GLBatchFileContents, *(Input.DumpDebugInfoPath / TEXT("GLSLCompile.bat")));
}
const FString NDABatchFileContents = CreateCommandLineGLSLES2(GLSLFile, (Input.DumpDebugInfoPath / TEXT("Output.asm")), Version, Frequency, true);
if (!NDABatchFileContents.IsEmpty())
{
FFileHelper::SaveStringToFile(NDABatchFileContents, *(Input.DumpDebugInfoPath / TEXT("NDAGLSLCompile.bat")));
}
if (GlslSourceLen > 0)
{
uint32 Len = FCStringAnsi::Strlen(TCHAR_TO_ANSI(*Input.SourceFilename)) + FCStringAnsi::Strlen(TCHAR_TO_ANSI(*Input.EntryPointName)) + FCStringAnsi::Strlen(GlslShaderSource) + 20;
char* Dest = (char*)malloc(Len);
FCStringAnsi::Snprintf(Dest, Len, "// ! %s.usf:%s\n%s", (const char*)TCHAR_TO_ANSI(*Input.SourceFilename), (const char*)TCHAR_TO_ANSI(*Input.EntryPointName), (const char*)GlslShaderSource);
free(GlslShaderSource);
GlslShaderSource = Dest;
GlslSourceLen = FCStringAnsi::Strlen(GlslShaderSource);
FArchive* FileWriter = IFileManager::Get().CreateFileWriter(*(Input.DumpDebugInfoPath / Input.SourceFilename + TEXT(".glsl")));
if (FileWriter)
{
FileWriter->Serialize(GlslShaderSource,GlslSourceLen+1);
FileWriter->Close();
delete FileWriter;
}
}
}
#if VALIDATE_GLSL_WITH_DRIVER
PrecompileShader(Output, Input, GlslShaderSource, Version, Frequency);
#else // VALIDATE_GLSL_WITH_DRIVER
int32 SourceLen = FCStringAnsi::Strlen(GlslShaderSource);
Output.Target = Input.Target;
BuildShaderOutput(Output, Input, GlslShaderSource, SourceLen, Version);
#endif // VALIDATE_GLSL_WITH_DRIVER
}
else
{
if (bDumpDebugInfo)
{
// Generate the batch file to help track down cross-compiler issues if necessary
const FString GLSLFile = (Input.DumpDebugInfoPath / TEXT("Output.glsl"));
const FString GLBatchFileContents = CreateCommandLineGLSLES2(GLSLFile, (Input.DumpDebugInfoPath / TEXT("Output.asm")), Version, Frequency, false);
if (!GLBatchFileContents.IsEmpty())
{
FFileHelper::SaveStringToFile(GLBatchFileContents, *(Input.DumpDebugInfoPath / TEXT("GLSLCompile.bat")));
}
}
FString Tmp = ANSI_TO_TCHAR(ErrorLog);
TArray<FString> ErrorLines;
Tmp.ParseIntoArray(ErrorLines, TEXT("\n"), true);
for (int32 LineIndex = 0; LineIndex < ErrorLines.Num(); ++LineIndex)
{
const FString& Line = ErrorLines[LineIndex];
CrossCompiler::ParseHlslccError(Output.Errors, Line);
}
}
if (GlslShaderSource)
{
free(GlslShaderSource);
}
if (ErrorLog)
{
free(ErrorLog);
}
}
}
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