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UnrealEngineUWP/Engine/Source/Developer/ShaderFormatOpenGL/Private/OpenGLShaderCompiler.cpp
Peter Sauerbrei aa5a1232f1 Merging 
//depot/UE4-TappyChicken/Engine/Source/...

to //depot/UE4/Engine/Source/...

[CL 2081906 by Peter Sauerbrei in Main branch]
2014-05-22 09:13:12 -04:00

1574 lines
46 KiB
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// Copyright 1998-2014 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 "hlslcc.h"
#include "glsl/ir_gen_glsl.h"
#if PLATFORM_WINDOWS
#include "AllowWindowsPlatformTypes.h"
#include <GL/glcorearb.h>
#include <GL/glext.h>
#include <GL/wglext.h>
#include "HideWindowsPlatformTypes.h"
#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 ENABLE_IMAGINATION_COMPILER 1
#define MAX_SAMPLERS_PER_SHADER_GLSL_150 16
#define MAX_SAMPLERS_PER_SHADER_GLSL_430 32
static FORCEINLINE bool IsES2Platform(GLSLVersion Version)
{
return (Version == GLSL_ES2 || Version == GLSL_150_ES2 || Version == GLSL_ES2_WEBGL || Version == GLSL_ES2_IOS);
}
static FORCEINLINE bool IsPCES2Platform(GLSLVersion Version)
{
return (Version == GLSL_150_ES2);
}
/*------------------------------------------------------------------------------
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_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
};
/** Map shader frequency -> string for messages. */
const TCHAR* GLFrequencyStringTable[] =
{
TEXT("Vertex"),
TEXT("Hull"),
TEXT("Domain"),
TEXT("Pixel"),
TEXT("Geometry"),
TEXT("Compute")
};
/** Compile time check to verify that the GL mapping tables are up-to-date. */
checkAtCompileTime(SF_NumFrequencies == ARRAY_COUNT(GLFrequencyTable), SF_NumFrequencesChanged_PleaseUpdateTables);
checkAtCompileTime(ARRAY_COUNT(GLFrequencyTable) == ARRAY_COUNT(GLFrequencyStringTable), FrequencyTableSizeMismatch);
/**
* 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 FString ParseIdentifier(const ANSICHAR* &Str)
{
FString Result;
while ((*Str >= 'A' && *Str <= 'Z')
|| (*Str >= 'a' && *Str <= 'z')
|| (*Str >= '0' && *Str <= '9')
|| *Str == '_')
{
Result += *Str;
++Str;
}
return Result;
}
static bool Match(const ANSICHAR* &Str, ANSICHAR Char)
{
if (*Str == Char)
{
++Str;
return true;
}
return false;
}
static uint32 ParseNumber(const ANSICHAR* &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 ANSICHAR* InShaderSource,
int32 SourceLen,
GLSLVersion Version
)
{
FOpenGLCodeHeader Header = {0};
const ANSICHAR* ShaderSource = InShaderSource;
FShaderParameterMap& ParameterMap = ShaderOutput.ParameterMap;
EShaderFrequency Frequency = (EShaderFrequency)ShaderOutput.Target.Frequency;
// 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);
}
#define DEF_PREFIX_STR(Str) \
const ANSICHAR* Str##Prefix = "// @" #Str ": "; \
const int32 Str##PrefixLen = FCStringAnsi::Strlen(Str##Prefix)
DEF_PREFIX_STR(Inputs);
DEF_PREFIX_STR(Outputs);
DEF_PREFIX_STR(UniformBlocks);
DEF_PREFIX_STR(Uniforms);
DEF_PREFIX_STR(PackedGlobals);
DEF_PREFIX_STR(PackedUB);
DEF_PREFIX_STR(PackedUBCopies);
DEF_PREFIX_STR(PackedUBGlobalCopies);
DEF_PREFIX_STR(Samplers);
DEF_PREFIX_STR(UAVs);
DEF_PREFIX_STR(SamplerStates);
#undef DEF_PREFIX_STR
// Skip any comments that come before the signature.
while ( FCStringAnsi::Strncmp(ShaderSource, "//", 2) == 0 &&
FCStringAnsi::Strncmp(ShaderSource, "// @", 4) != 0 )
{
while (*ShaderSource && *ShaderSource++ != '\n') {}
}
// HLSLCC first prints the list of inputs.
if (FCStringAnsi::Strncmp(ShaderSource, InputsPrefix, InputsPrefixLen) == 0)
{
ShaderSource += InputsPrefixLen;
// Only inputs for vertex shaders must be tracked.
if (Frequency == SF_Vertex)
{
const ANSICHAR* AttributePrefix = "in_ATTRIBUTE";
const int32 AttributePrefixLen = FCStringAnsi::Strlen(AttributePrefix);
while (*ShaderSource && *ShaderSource != '\n')
{
// Skip the type.
while (*ShaderSource && *ShaderSource++ != ':') {}
// Only process attributes.
if (FCStringAnsi::Strncmp(ShaderSource, AttributePrefix, AttributePrefixLen) == 0)
{
ShaderSource += AttributePrefixLen;
uint8 AttributeIndex = ParseNumber(ShaderSource);
Header.Bindings.InOutMask |= (1 << AttributeIndex);
}
// Skip to the next.
while (*ShaderSource && *ShaderSource != ',' && *ShaderSource != '\n')
{
ShaderSource++;
}
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
}
else
{
// Skip to the next line.
while (*ShaderSource && *ShaderSource++ != '\n') {}
}
}
// Then the list of outputs.
if (FCStringAnsi::Strncmp(ShaderSource, OutputsPrefix, OutputsPrefixLen) == 0)
{
ShaderSource += OutputsPrefixLen;
// Only outputs for pixel shaders must be tracked.
if (Frequency == SF_Pixel)
{
const ANSICHAR* TargetPrefix = "out_Target";
const int32 TargetPrefixLen = FCStringAnsi::Strlen(TargetPrefix);
while (*ShaderSource && *ShaderSource != '\n')
{
// Skip the type.
while (*ShaderSource && *ShaderSource++ != ':') {}
// Handle targets.
if (FCStringAnsi::Strncmp(ShaderSource, TargetPrefix, TargetPrefixLen) == 0)
{
ShaderSource += TargetPrefixLen;
uint8 TargetIndex = ParseNumber(ShaderSource);
Header.Bindings.InOutMask |= (1 << TargetIndex);
}
// Handle depth writes.
else if (FCStringAnsi::Strcmp(ShaderSource, "gl_FragDepth") == 0)
{
Header.Bindings.InOutMask |= 0x8000;
}
// Skip to the next.
while (*ShaderSource && *ShaderSource != ',' && *ShaderSource != '\n')
{
ShaderSource++;
}
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
}
else
{
// Skip to the next line.
while (*ShaderSource && *ShaderSource++ != '\n') {}
}
}
// Then 'normal' uniform buffers.
if (FCStringAnsi::Strncmp(ShaderSource, UniformBlocksPrefix, UniformBlocksPrefixLen) == 0)
{
ShaderSource += UniformBlocksPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
FString BufferName = ParseIdentifier(ShaderSource);
verify(BufferName.Len() > 0);
verify(Match(ShaderSource, '('));
uint16 UBIndex = ParseNumber(ShaderSource);
check(UBIndex == Header.Bindings.NumUniformBuffers);
verify(Match(ShaderSource, ')'));
ParameterMap.AddParameterAllocation(*BufferName, Header.Bindings.NumUniformBuffers++, 0, 0);
// Skip the comma.
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
Match(ShaderSource, '\n');
}
// Then uniforms.
const uint16 BytesPerComponent = 4;
/*
uint16 PackedUniformSize[OGL_NUM_PACKED_UNIFORM_ARRAYS] = {0};
FMemory::Memzero(&PackedUniformSize, sizeof(PackedUniformSize));
*/
if (FCStringAnsi::Strncmp(ShaderSource, UniformsPrefix, UniformsPrefixLen) == 0)
{
// @todo-mobile: Will we ever need to support this code path?
check(0);
/*
ShaderSource += UniformsPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
uint16 ArrayIndex = 0;
uint16 Offset = 0;
uint16 NumComponents = 0;
FString ParameterName = ParseIdentifier(ShaderSource);
verify(ParameterName.Len() > 0);
verify(Match(ShaderSource, '('));
ArrayIndex = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
Offset = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
NumComponents = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ')'));
ParameterMap.AddParameterAllocation(
*ParameterName,
ArrayIndex,
Offset * BytesPerComponent,
NumComponents * BytesPerComponent
);
if (ArrayIndex < OGL_NUM_PACKED_UNIFORM_ARRAYS)
{
PackedUniformSize[ArrayIndex] = FMath::Max<uint16>(
PackedUniformSize[ArrayIndex],
BytesPerComponent * (Offset + NumComponents)
);
}
// Skip the comma.
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
Match(ShaderSource, '\n');
*/
}
// Packed global uniforms
TMap<ANSICHAR, uint16> PackedGlobalArraySize;
if (FCStringAnsi::Strncmp(ShaderSource, PackedGlobalsPrefix, PackedGlobalsPrefixLen) == 0)
{
ShaderSource += PackedGlobalsPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
ANSICHAR ArrayIndex = 0;
uint16 Offset = 0;
uint16 NumComponents = 0;
FString ParameterName = ParseIdentifier(ShaderSource);
verify(ParameterName.Len() > 0);
verify(Match(ShaderSource, '('));
ArrayIndex = *ShaderSource++;
verify(Match(ShaderSource, ':'));
Offset = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ','));
NumComponents = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ')'));
ParameterMap.AddParameterAllocation(
*ParameterName,
ArrayIndex,
Offset * BytesPerComponent,
NumComponents * BytesPerComponent
);
uint16& Size = PackedGlobalArraySize.FindOrAdd(ArrayIndex);
Size = FMath::Max<uint16>(BytesPerComponent * (Offset + NumComponents), Size);
if (Match(ShaderSource, '\n'))
{
break;
}
// Skip the comma.
verify(Match(ShaderSource, ','));
}
Match(ShaderSource, '\n');
}
// Packed Uniform Buffers
TMap<int, TMap<ANSICHAR, uint16> > PackedUniformBuffersSize;
while (FCStringAnsi::Strncmp(ShaderSource, PackedUBPrefix, PackedUBPrefixLen) == 0)
{
ShaderSource += PackedUBPrefixLen;
FString BufferName = ParseIdentifier(ShaderSource);
verify(BufferName.Len() > 0);
verify(Match(ShaderSource, '('));
uint16 BufferIndex = ParseNumber(ShaderSource);
check(BufferIndex == Header.Bindings.NumUniformBuffers);
verify(Match(ShaderSource, ')'));
ParameterMap.AddParameterAllocation(*BufferName, Header.Bindings.NumUniformBuffers++, 0, 0);
verify(Match(ShaderSource, ':'));
Match(ShaderSource, ' ');
while (*ShaderSource && *ShaderSource != '\n')
{
FString ParameterName = ParseIdentifier(ShaderSource);
verify(ParameterName.Len() > 0);
verify(Match(ShaderSource, '('));
ParseNumber(ShaderSource);
verify(Match(ShaderSource, ','));
ParseNumber(ShaderSource);
verify(Match(ShaderSource, ')'));
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
}
// Packed Uniform Buffers copy lists & setup sizes for each UB/Precision entry
enum EFlattenUBState
{
Unknown,
GroupedUBs,
FlattenedUBs,
};
EFlattenUBState UBState = Unknown;
if (FCStringAnsi::Strncmp(ShaderSource, PackedUBCopiesPrefix, PackedUBCopiesPrefixLen) == 0)
{
ShaderSource += PackedUBCopiesPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
FOpenGLUniformBufferCopyInfo CopyInfo;
CopyInfo.SourceUBIndex = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
CopyInfo.SourceOffsetInFloats = ParseNumber(ShaderSource);
verify(Match(ShaderSource, '-'));
CopyInfo.DestUBIndex = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
CopyInfo.DestUBTypeName = *ShaderSource++;
CopyInfo.DestUBTypeIndex = GLPackedTypeNameToTypeIndex(CopyInfo.DestUBTypeName);
verify(Match(ShaderSource, ':'));
CopyInfo.DestOffsetInFloats = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
CopyInfo.SizeInFloats = ParseNumber(ShaderSource);
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);
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
check(UBState == Unknown);
UBState = GroupedUBs;
}
if (FCStringAnsi::Strncmp(ShaderSource, PackedUBGlobalCopiesPrefix, PackedUBGlobalCopiesPrefixLen) == 0)
{
ShaderSource += PackedUBGlobalCopiesPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
FOpenGLUniformBufferCopyInfo CopyInfo;
CopyInfo.SourceUBIndex = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
CopyInfo.SourceOffsetInFloats = ParseNumber(ShaderSource);
verify(Match(ShaderSource, '-'));
CopyInfo.DestUBIndex = 0;
CopyInfo.DestUBTypeName = *ShaderSource++;
CopyInfo.DestUBTypeIndex = GLPackedTypeNameToTypeIndex(CopyInfo.DestUBTypeName);
verify(Match(ShaderSource, ':'));
CopyInfo.DestOffsetInFloats = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
CopyInfo.SizeInFloats = ParseNumber(ShaderSource);
Header.UniformBuffersCopyInfo.Add(CopyInfo);
uint16& Size = PackedGlobalArraySize.FindOrAdd(CopyInfo.DestUBTypeName);
Size = FMath::Max<uint16>(BytesPerComponent * (CopyInfo.DestOffsetInFloats + CopyInfo.SizeInFloats), Size);
if (Match(ShaderSource, '\n'))
{
break;
}
verify(Match(ShaderSource, ','));
}
check(UBState == Unknown);
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);
FOpenGLPackedArrayInfo Info;
Info.Size = Size;
Info.TypeName = TypeName;
Info.TypeIndex = GLPackedTypeNameToTypeIndex(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<FOpenGLPackedArrayInfo> InfoArray;
InfoArray.Reserve(ArraySizes.Num());
for (auto IterSizes = ArraySizes.CreateIterator(); IterSizes; ++IterSizes)
{
ANSICHAR TypeName = IterSizes.Key();
uint16 Size = IterSizes.Value();
Size = (Size + 0xf) & (~0xf);
FOpenGLPackedArrayInfo Info;
Info.Size = Size;
Info.TypeName = TypeName;
Info.TypeIndex = GLPackedTypeNameToTypeIndex(TypeName);
InfoArray.Add(Info);
}
Header.Bindings.PackedUniformBuffers.Add(InfoArray);
}
// Then samplers.
if (FCStringAnsi::Strncmp(ShaderSource, SamplersPrefix, SamplersPrefixLen) == 0)
{
ShaderSource += SamplersPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
uint16 Offset = 0;
uint16 NumSamplers = 0;
FString ParameterName = ParseIdentifier(ShaderSource);
verify(ParameterName.Len() > 0);
verify(Match(ShaderSource, '('));
Offset = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
NumSamplers = ParseNumber(ShaderSource);
ParameterMap.AddParameterAllocation(
*ParameterName,
0,
Offset,
NumSamplers
);
Header.Bindings.NumSamplers = FMath::Max<uint8>(
Header.Bindings.NumSamplers,
Offset + NumSamplers
);
if (Match(ShaderSource, '['))
{
// Sampler States
do
{
FString SamplerState = ParseIdentifier(ShaderSource);
checkSlow(SamplerState.Len() != 0);
ParameterMap.AddParameterAllocation(
*SamplerState,
0,
Offset,
NumSamplers
);
}
while (Match(ShaderSource, ','));
verify(Match(ShaderSource, ']'));
}
verify(Match(ShaderSource, ')'));
if (Match(ShaderSource, '\n'))
{
break;
}
// Skip the comma.
verify(Match(ShaderSource, ','));
}
}
// Then UAVs (images in GLSL)
if (FCStringAnsi::Strncmp(ShaderSource, UAVsPrefix, UAVsPrefixLen) == 0)
{
ShaderSource += UAVsPrefixLen;
while (*ShaderSource && *ShaderSource != '\n')
{
uint16 Offset = 0;
uint16 NumUAVs = 0;
FString ParameterName = ParseIdentifier(ShaderSource);
verify(ParameterName.Len() > 0);
verify(Match(ShaderSource, '('));
Offset = ParseNumber(ShaderSource);
verify(Match(ShaderSource, ':'));
NumUAVs = ParseNumber(ShaderSource);
ParameterMap.AddParameterAllocation(
*ParameterName,
0,
Offset,
NumUAVs
);
Header.Bindings.NumUAVs = FMath::Max<uint8>(
Header.Bindings.NumUAVs,
Offset + NumUAVs
);
verify(Match(ShaderSource, ')'));
if (Match(ShaderSource, '\n'))
{
break;
}
// Skip the comma.
verify(Match(ShaderSource, ','));
}
}
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.Code, true);
Ar << Header;
Ar.Serialize((void*)ShaderSource, SourceLen + 1 - (ShaderSource - InShaderSource));
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_430:
OutMajorVersion = 4;
OutMinorVersion = 3;
break;
case GLSL_150_ES2:
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, 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, ShaderSource, SourceLen, GLSL_ES2);
}
}
else
{
ShaderOutput.bSucceeded = true;
ShaderOutput.Target = ShaderInput.Target;
BuildShaderOutput(ShaderOutput, 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."), GLFrequencyStringTable[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,
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.GetTypedData());
CompileLog = ANSI_TO_TCHAR(RawCompileLog.GetTypedData());
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.GetTypedData())
);
}
}
else
{
FShaderCompilerError* NewError = new(ShaderOutput.Errors) FShaderCompilerError();
NewError->StrippedErrorMessage = TEXT("Shader compile failed without errors.");
}
ShaderOutput.bSucceeded = false;
}
}
glDeleteShader(Shader);
PlatformReleaseOpenGL(ContextPtr, PrevContextPtr);
}
}
/**
* Parse an error emitted by the HLSL cross-compiler.
* @param OutErrors - Array into which compiler errors may be added.
* @param InLine - A line from the compile log.
*/
static void ParseHlslccError(TArray<FShaderCompilerError>& OutErrors, const FString& InLine)
{
const TCHAR* p = *InLine;
FShaderCompilerError* Error = new(OutErrors) FShaderCompilerError();
// Copy the filename.
while (*p && *p != TEXT('(')) { Error->ErrorFile += (*p++); }
Error->ErrorFile = GetRelativeShaderFilename(Error->ErrorFile);
p++;
// Parse the line number.
int32 LineNumber = 0;
while (*p && *p >= TEXT('0') && *p <= TEXT('9'))
{
LineNumber = 10 * LineNumber + (*p++ - TEXT('0'));
}
Error->ErrorLineString = *FString::Printf(TEXT("%d"), LineNumber);
// Skip to the warning message.
while (*p && (*p == TEXT(')') || *p == TEXT(':') || *p == TEXT(' ') || *p == TEXT('\t'))) { p++; }
Error->StrippedErrorMessage = p;
}
/*------------------------------------------------------------------------------
External interface.
------------------------------------------------------------------------------*/
static FString CreateCommandLineHLSLCC( const FString& ShaderFile, const FString& OutputFile, const FString& EntryPoint, EHlslShaderFrequency Frequency, GLSLVersion Version, uint32 CCFlags )
{
const TCHAR* FrequencySwitch = TEXT("");
switch (Frequency)
{
case HSF_PixelShader:
FrequencySwitch = TEXT(" -ps");
break;
case HSF_VertexShader:
FrequencySwitch = TEXT(" -vs");
break;
case HSF_HullShader:
FrequencySwitch = TEXT(" -hs");
break;
case HSF_DomainShader:
FrequencySwitch = TEXT(" -ds");
break;
case HSF_ComputeShader:
FrequencySwitch = TEXT(" -cs");
break;
case HSF_GeometryShader:
FrequencySwitch = TEXT(" -gs");
break;
default:
check(0);
}
const TCHAR* VersionSwitch = TEXT("");
switch (Version)
{
case GLSL_150:
VersionSwitch = TEXT(" -gl3");
break;
case GLSL_150_MAC:
VersionSwitch = TEXT(" -gl3 -mac");
break;
case GLSL_150_ES2:
VersionSwitch = TEXT(" -gl3 -flattenub -flattenubstruct");
break;
case GLSL_430:
VersionSwitch = TEXT(" -gl4");
break;
case GLSL_ES2:
case GLSL_ES2_WEBGL:
VersionSwitch = TEXT(" -es2");
break;
case GLSL_ES2_IOS:
VersionSwitch = TEXT(" -es2");
break;
default:
return TEXT("");
}
const TCHAR* ApplyCSE = (CCFlags & HLSLCC_ApplyCommonSubexpressionElimination) != 0 ? TEXT("-cse") : TEXT("");
FString CmdLine = FPaths::RootDir() / FString::Printf(TEXT("Engine\\Source\\ThirdParty\\hlslcc\\hlslcc\\bin\\Win64\\VS2013\\hlslcc_64.exe %s -o=%s %s -entry=%s %s %s"), *ShaderFile, *OutputFile, FrequencySwitch, *EntryPoint, VersionSwitch, ApplyCSE);
CmdLine += "\npause";
return CmdLine;
}
/**
* 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;
switch (Version)
{
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;
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:
AdditionalDefines.SetDefine(TEXT("COMPILER_GLSL"), 1);
AdditionalDefines.SetDefine(TEXT("ES2_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));
AdditionalDefines.SetDefine(TEXT("COMPILER_SUPPORTS_ATTRIBUTES"), (uint32)1);
if (PreprocessShader(PreprocessedShader, Output, Input, AdditionalDefines))
{
char* GlslShaderSource = NULL;
char* ErrorLog = NULL;
const EHlslShaderFrequency FrequencyTable[] =
{
HSF_VertexShader,
Version == GLSL_430 ? HSF_HullShader : HSF_InvalidFrequency,
Version == GLSL_430 ? HSF_DomainShader : HSF_InvalidFrequency,
HSF_PixelShader,
IsES2Platform(Version) ? HSF_InvalidFrequency : HSF_GeometryShader,
Version == GLSL_430 ? 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."),
GLFrequencyStringTable[Input.Target.Frequency]
);
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))
{
CCFlags |= HLSLCC_FlattenUniformBuffers | HLSLCC_FlattenUniformBufferStructures;
// Currently only enabled for ES2, as there are still features to implement for SM4+ (atomics, global store, UAVs, etc)
if (!IsPCES2Platform(Version))
{
CCFlags |= HLSLCC_ApplyCommonSubexpressionElimination;
}
}
if (bDumpDebugInfo)
{
const FString GLSLFile = (Input.DumpDebugInfoPath / TEXT("Output.glsl"));
const FString USFFile = (Input.DumpDebugInfoPath / Input.SourceFilename) + TEXT(".usf");
const FString CCBatchFileContents = CreateCommandLineHLSLCC(USFFile, GLSLFile, *Input.EntryPointName, Frequency, Version, CCFlags);
if (!CCBatchFileContents.IsEmpty())
{
FFileHelper::SaveStringToFile(CCBatchFileContents, *(Input.DumpDebugInfoPath / TEXT("CrossCompile.bat")));
}
}
FGlslCodeBackend GlslBackEnd(CCFlags);
FGlslLanguageSpec GLslLanguageSpec(IsES2Platform(Version) && !IsPCES2Platform(Version));
int32 Result = HlslCrossCompile(
TCHAR_TO_ANSI(*Input.SourceFilename),
TCHAR_TO_ANSI(*PreprocessedShader),
TCHAR_TO_ANSI(*Input.EntryPointName),
Frequency,
&GlslBackEnd,
&GLslLanguageSpec,
CCFlags,
HlslCompilerTarget,
&GlslShaderSource,
&ErrorLog
);
if (Result != 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")));
}
int32 GlslSourceLen = FCStringAnsi::Strlen(GlslShaderSource);
if (GlslSourceLen > 0)
{
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);
if (Output.bSucceeded == false)
{
#if DUMP_HLSCLCC_SHADERS
DumpFile.SetFilename( *DumpGLSL);
for(int i = 0; i < Output.Errors.Num(); ++i)
{
DumpFile.Logf(TEXT("%s"), *Output.Errors[i].GetErrorString());
}
DumpFile.Flush();
#endif
}
#else // VALIDATE_GLSL_WITH_DRIVER
int32 SourceLen = FCStringAnsi::Strlen(GlslShaderSource);
Output.Target = Input.Target;
BuildShaderOutput(Output, GlslShaderSource, SourceLen, Version);
#endif // VALIDATE_GLSL_WITH_DRIVER
}
else
{
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];
ParseHlslccError(Output.Errors, Line);
}
}
if (GlslShaderSource)
{
free(GlslShaderSource);
}
if (ErrorLog)
{
free(ErrorLog);
}
}
}
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