protot/src/shaderc_compile.cpp

1545 lines
36 KiB
C++

/*
* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include "shaderc.h"
bool g_verbose = false;
#define MAX_TAGS 256
extern "C"
{
#include <fcpp/fpp.h>
} // extern "C"
#define BGFX_CHUNK_MAGIC_CSH BX_MAKEFOURCC('C', 'S', 'H', 0x2)
#define BGFX_CHUNK_MAGIC_FSH BX_MAKEFOURCC('F', 'S', 'H', 0x4)
#define BGFX_CHUNK_MAGIC_VSH BX_MAKEFOURCC('V', 'S', 'H', 0x4)
long int fsize(FILE* _file)
{
long int pos = ftell(_file);
fseek(_file, 0L, SEEK_END);
long int size = ftell(_file);
fseek(_file, pos, SEEK_SET);
return size;
}
static const char* s_ARB_shader_texture_lod[] =
{
"texture2DLod",
"texture2DProjLod",
"texture3DLod",
"texture3DProjLod",
"textureCubeLod",
"shadow2DLod",
"shadow2DProjLod",
NULL
// "texture1DLod",
// "texture1DProjLod",
// "shadow1DLod",
// "shadow1DProjLod",
};
static const char* s_EXT_shadow_samplers[] =
{
"shadow2D",
"shadow2DProj",
"sampler2DShadow",
NULL
};
static const char* s_OES_standard_derivatives[] =
{
"dFdx",
"dFdy",
"fwidth",
NULL
};
static const char* s_OES_texture_3D[] =
{
"texture3D",
"texture3DProj",
"texture3DLod",
"texture3DProjLod",
NULL
};
static const char* s_130[] =
{
"uint",
"uint2",
"uint3",
"uint4",
"isampler3D",
"usampler3D",
NULL
};
const char* s_uniformTypeName[UniformType::Count] =
{
"int",
NULL,
"vec4",
"mat3",
"mat4",
};
const char* interpolationDx11(const char* _glsl)
{
if (0 == strcmp(_glsl, "smooth") )
{
return "linear";
}
else if (0 == strcmp(_glsl, "flat") )
{
return "nointerpolation";
}
return _glsl; // noperspective
}
const char* getUniformTypeName(UniformType::Enum _enum)
{
return s_uniformTypeName[_enum];
}
UniformType::Enum nameToUniformTypeEnum(const char* _name)
{
for (uint32_t ii = 0; ii < UniformType::Count; ++ii)
{
if (NULL != s_uniformTypeName[ii]
&& 0 == strcmp(_name, s_uniformTypeName[ii]) )
{
return UniformType::Enum(ii);
}
}
return UniformType::Count;
}
int32_t writef(bx::WriterI* _writer, const char* _format, ...)
{
va_list argList;
va_start(argList, _format);
char temp[2048];
char* out = temp;
int32_t max = sizeof(temp);
int32_t len = bx::vsnprintf(out, max, _format, argList);
if (len > max)
{
out = (char*)alloca(len);
len = bx::vsnprintf(out, len, _format, argList);
}
len = bx::write(_writer, out, len);
va_end(argList);
return len;
}
struct Varying
{
std::string m_precision;
std::string m_interpolation;
std::string m_name;
std::string m_type;
std::string m_init;
std::string m_semantics;
};
typedef std::unordered_map<std::string, Varying> VaryingMap;
class File
{
public:
File(const char* _filePath)
: m_data(NULL)
{
FILE* file = fopen(_filePath, "r");
if (NULL != file)
{
m_size = fsize(file);
m_data = new char[m_size+1];
m_size = (uint32_t)fread(m_data, 1, m_size, file);
m_data[m_size] = '\0';
fclose(file);
}
}
~File()
{
delete [] m_data;
}
const char* getData() const
{
return m_data;
}
uint32_t getSize() const
{
return m_size;
}
private:
char* m_data;
uint32_t m_size;
};
void strins(char* _str, const char* _insert)
{
size_t len = strlen(_insert);
memmove(&_str[len], _str, strlen(_str) );
memcpy(_str, _insert, len);
}
void strreplace(char* _str, const char* _find, const char* _replace)
{
const size_t len = strlen(_find);
char* replace = (char*)alloca(len+1);
bx::strlcpy(replace, _replace, len+1);
for (size_t ii = strlen(replace); ii < len; ++ii)
{
replace[ii] = ' ';
}
replace[len] = '\0';
BX_CHECK(len >= strlen(_replace), "");
for (char* ptr = strstr(_str, _find); NULL != ptr; ptr = strstr(ptr + len, _find) )
{
memcpy(ptr, replace, len);
}
}
void printCode(const char* _code, int32_t _line, int32_t _start, int32_t _end)
{
fprintf(stderr, "Code:\n---\n");
LineReader lr(_code);
for (int32_t line = 1; !lr.isEof() && line < _end; ++line)
{
if (line >= _start)
{
fprintf(stderr, "%s%3d: %s", _line == line ? ">>> " : " ", line, lr.getLine().c_str() );
}
else
{
lr.skipLine();
}
}
fprintf(stderr, "---\n");
}
struct Preprocessor
{
Preprocessor(const char* _filePath, bool _gles, const char* _includeDir = NULL)
: m_tagptr(m_tags)
, m_scratchPos(0)
, m_fgetsPos(0)
{
m_tagptr->tag = FPPTAG_USERDATA;
m_tagptr->data = this;
m_tagptr++;
m_tagptr->tag = FPPTAG_DEPENDS;
m_tagptr->data = (void*)fppDepends;
m_tagptr++;
m_tagptr->tag = FPPTAG_INPUT;
m_tagptr->data = (void*)fppInput;
m_tagptr++;
m_tagptr->tag = FPPTAG_OUTPUT;
m_tagptr->data = (void*)fppOutput;
m_tagptr++;
m_tagptr->tag = FPPTAG_ERROR;
m_tagptr->data = (void*)fppError;
m_tagptr++;
m_tagptr->tag = FPPTAG_IGNOREVERSION;
m_tagptr->data = (void*)0;
m_tagptr++;
m_tagptr->tag = FPPTAG_LINE;
m_tagptr->data = (void*)0;
m_tagptr++;
m_tagptr->tag = FPPTAG_INPUT_NAME;
m_tagptr->data = scratch(_filePath);
m_tagptr++;
if (NULL != _includeDir)
{
addInclude(_includeDir);
}
if (!_gles)
{
m_default = "#define lowp\n#define mediump\n#define highp\n";
}
}
void setDefine(const char* _define)
{
m_tagptr->tag = FPPTAG_DEFINE;
m_tagptr->data = scratch(_define);
m_tagptr++;
}
void setDefaultDefine(const char* _name)
{
char temp[1024];
bx::snprintf(temp, BX_COUNTOF(temp)
, "#ifndef %s\n"
"# define %s 0\n"
"#endif // %s\n"
"\n"
, _name
, _name
, _name
);
m_default += temp;
}
void writef(const char* _format, ...)
{
va_list argList;
va_start(argList, _format);
bx::stringPrintfVargs(m_default, _format, argList);
va_end(argList);
}
void addInclude(const char* _includeDir)
{
char* start = scratch(_includeDir);
for (char* split = strchr(start, ';'); NULL != split; split = strchr(start, ';'))
{
*split = '\0';
m_tagptr->tag = FPPTAG_INCLUDE_DIR;
m_tagptr->data = start;
m_tagptr++;
start = split + 1;
}
m_tagptr->tag = FPPTAG_INCLUDE_DIR;
m_tagptr->data = start;
m_tagptr++;
}
void addDependency(const char* _fileName)
{
m_depends += " \\\n ";
m_depends += _fileName;
}
bool run(const char* _input)
{
m_fgetsPos = 0;
m_preprocessed.clear();
m_input = m_default;
m_input += "\n\n";
size_t len = strlen(_input)+1;
char* temp = new char[len];
bx::eolLF(temp, len, _input);
m_input += temp;
delete [] temp;
fppTag* tagptr = m_tagptr;
tagptr->tag = FPPTAG_END;
tagptr->data = 0;
tagptr++;
int result = fppPreProcess(m_tags);
return 0 == result;
}
char* fgets(char* _buffer, int _size)
{
int ii = 0;
for (char ch = m_input[m_fgetsPos]; m_fgetsPos < m_input.size() && ii < _size-1; ch = m_input[++m_fgetsPos])
{
_buffer[ii++] = ch;
if (ch == '\n' || ii == _size)
{
_buffer[ii] = '\0';
m_fgetsPos++;
return _buffer;
}
}
return NULL;
}
static void fppDepends(char* _fileName, void* _userData)
{
Preprocessor* thisClass = (Preprocessor*)_userData;
thisClass->addDependency(_fileName);
}
static char* fppInput(char* _buffer, int _size, void* _userData)
{
Preprocessor* thisClass = (Preprocessor*)_userData;
return thisClass->fgets(_buffer, _size);
}
static void fppOutput(int _ch, void* _userData)
{
Preprocessor* thisClass = (Preprocessor*)_userData;
thisClass->m_preprocessed += _ch;
}
static void fppError(void* /*_userData*/, char* _format, va_list _vargs)
{
vfprintf(stderr, _format, _vargs);
}
char* scratch(const char* _str)
{
char* result = &m_scratch[m_scratchPos];
strcpy(result, _str);
m_scratchPos += (uint32_t)strlen(_str)+1;
return result;
}
fppTag m_tags[MAX_TAGS];
fppTag* m_tagptr;
std::string m_depends;
std::string m_default;
std::string m_input;
std::string m_preprocessed;
char m_scratch[16<<10];
uint32_t m_scratchPos;
uint32_t m_fgetsPos;
};
typedef std::vector<std::string> InOut;
uint32_t parseInOut(InOut& _inout, const char* _str, const char* _eol)
{
uint32_t hash = 0;
_str = bx::strws(_str);
if (_str < _eol)
{
const char* delim;
do
{
delim = strpbrk(_str, " ,");
if (NULL != delim)
{
delim = delim > _eol ? _eol : delim;
std::string token;
token.assign(_str, delim-_str);
_inout.push_back(token);
_str = bx::strws(delim + 1);
}
}
while (delim < _eol && _str < _eol && NULL != delim);
std::sort(_inout.begin(), _inout.end() );
bx::HashMurmur2A murmur;
murmur.begin();
for (InOut::const_iterator it = _inout.begin(), itEnd = _inout.end(); it != itEnd; ++it)
{
murmur.add(it->c_str(), (uint32_t)it->size() );
}
hash = murmur.end();
}
return hash;
}
void addFragData(Preprocessor& _preprocessor, char* _data, uint32_t _idx, bool _comma)
{
char find[32];
bx::snprintf(find, sizeof(find), "gl_FragData[%d]", _idx);
char replace[32];
bx::snprintf(replace, sizeof(replace), "gl_FragData_%d_", _idx);
strreplace(_data, find, replace);
_preprocessor.writef(
" \\\n\t%sout vec4 gl_FragData_%d_ : SV_TARGET%d"
, _comma ? ", " : " "
, _idx
, _idx
);
}
void voidFragData(char* _data, uint32_t _idx)
{
char find[32];
bx::snprintf(find, sizeof(find), "gl_FragData[%d]", _idx);
strreplace(_data, find, "bgfx_VoidFrag");
}
// c - compute
// d - domain
// f - fragment
// g - geometry
// h - hull
// v - vertex
//
// OpenGL #version Features Direct3D Features Shader Model
// 2.1 120 vf 9.0 vf 2.0
// 3.0 130
// 3.1 140
// 3.2 150 vgf
// 3.3 330 10.0 vgf 4.0
// 4.0 400 vhdgf
// 4.1 410
// 4.2 420 11.0 vhdgf+c 5.0
// 4.3 430 vhdgf+c
// 4.4 440
static void help (const char* errmsg) {
fprintf(stderr, "%s\n", errmsg);
}
int compileShader(bx::CommandLine& _cmdLine, bx::ReaderSeekerI* _reader, bx::WriterI* _writer)
{
g_verbose = _cmdLine.hasArg("verbose");
const char* filePath = _cmdLine.findOption('f');
if (NULL == filePath)
{
help("Shader file name must be specified.");
return EXIT_FAILURE;
}
const char* outFilePath = _cmdLine.findOption('o');
const char* type = _cmdLine.findOption('\0', "type");
if (NULL == type)
{
help("Must specify shader type.");
return EXIT_FAILURE;
}
const char* platform = _cmdLine.findOption('\0', "platform");
if (NULL == platform)
{
help("Must specify platform.");
return EXIT_FAILURE;
}
bool raw = _cmdLine.hasArg('\0', "raw");
uint32_t glsl = 0;
uint32_t essl = 0;
uint32_t hlsl = 2;
uint32_t d3d = 11;
uint32_t metal = 0;
const char* profile = _cmdLine.findOption('p', "profile");
if (NULL != profile)
{
if (0 == strncmp(&profile[1], "s_4_0_level", 11) )
{
hlsl = 2;
}
else if (0 == strncmp(&profile[1], "s_3", 3) )
{
hlsl = 3;
d3d = 9;
}
else if (0 == strncmp(&profile[1], "s_4", 3) )
{
hlsl = 4;
}
else if (0 == strncmp(&profile[1], "s_5", 3) )
{
hlsl = 5;
}
else if (0 == strcmp(profile, "metal") )
{
metal = 1;
}
else
{
glsl = atoi(profile);
}
}
else
{
essl = 2;
}
bool depends = _cmdLine.hasArg("depends");
bool preprocessOnly = _cmdLine.hasArg("preprocess");
const char* includeDir = _cmdLine.findOption('i');
Preprocessor preprocessor(filePath, 0 != essl, includeDir);
std::string dir;
{
const char* base = bx::baseName(filePath);
if (base != filePath)
{
dir.assign(filePath, base-filePath);
preprocessor.addInclude(dir.c_str() );
}
}
preprocessor.setDefaultDefine("BX_PLATFORM_ANDROID");
preprocessor.setDefaultDefine("BX_PLATFORM_EMSCRIPTEN");
preprocessor.setDefaultDefine("BX_PLATFORM_IOS");
preprocessor.setDefaultDefine("BX_PLATFORM_LINUX");
preprocessor.setDefaultDefine("BX_PLATFORM_NACL");
preprocessor.setDefaultDefine("BX_PLATFORM_OSX");
preprocessor.setDefaultDefine("BX_PLATFORM_WINDOWS");
preprocessor.setDefaultDefine("BX_PLATFORM_XBOX360");
// preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_ESSL");
preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_GLSL");
preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_HLSL");
preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_METAL");
preprocessor.setDefaultDefine("BGFX_SHADER_TYPE_COMPUTE");
preprocessor.setDefaultDefine("BGFX_SHADER_TYPE_FRAGMENT");
preprocessor.setDefaultDefine("BGFX_SHADER_TYPE_VERTEX");
char glslDefine[128];
bx::snprintf(glslDefine, BX_COUNTOF(glslDefine), "BGFX_SHADER_LANGUAGE_GLSL=%d", essl ? 1 : glsl);
if (0 == bx::stricmp(platform, "android") )
{
preprocessor.setDefine("BX_PLATFORM_ANDROID=1");
preprocessor.setDefine("BGFX_SHADER_LANGUAGE_GLSL=1");
}
else if (0 == bx::stricmp(platform, "asm.js") )
{
preprocessor.setDefine("BX_PLATFORM_EMSCRIPTEN=1");
preprocessor.setDefine("BGFX_SHADER_LANGUAGE_GLSL=1");
}
else if (0 == bx::stricmp(platform, "ios") )
{
preprocessor.setDefine("BX_PLATFORM_IOS=1");
preprocessor.setDefine("BGFX_SHADER_LANGUAGE_GLSL=1");
}
else if (0 == bx::stricmp(platform, "linux") )
{
preprocessor.setDefine("BX_PLATFORM_LINUX=1");
preprocessor.setDefine(glslDefine);
}
else if (0 == bx::stricmp(platform, "nacl") )
{
preprocessor.setDefine("BX_PLATFORM_NACL=1");
preprocessor.setDefine("BGFX_SHADER_LANGUAGE_GLSL=1");
}
else if (0 == bx::stricmp(platform, "osx") )
{
preprocessor.setDefine("BX_PLATFORM_OSX=1");
preprocessor.setDefine(glslDefine);
char temp[256];
bx::snprintf(temp, sizeof(temp), "BGFX_SHADER_LANGUAGE_METAL=%d", metal);
preprocessor.setDefine(temp);
}
else if (0 == bx::stricmp(platform, "windows") )
{
preprocessor.setDefine("BX_PLATFORM_WINDOWS=1");
char temp[256];
bx::snprintf(temp, sizeof(temp), "BGFX_SHADER_LANGUAGE_HLSL=%d", hlsl);
preprocessor.setDefine(temp);
}
else if (0 == bx::stricmp(platform, "xbox360") )
{
preprocessor.setDefine("BX_PLATFORM_XBOX360=1");
preprocessor.setDefine("BGFX_SHADER_LANGUAGE_HLSL=3");
}
else
{
fprintf(stderr, "Unknown platform %s?!", platform);
return EXIT_FAILURE;
}
preprocessor.setDefine("M_PI=3.1415926535897932384626433832795");
char shaderType = tolower(type[0]);
switch (shaderType)
{
case 'c':
preprocessor.setDefine("BGFX_SHADER_TYPE_COMPUTE=1");
break;
case 'f':
preprocessor.setDefine("BGFX_SHADER_TYPE_FRAGMENT=1");
break;
case 'v':
preprocessor.setDefine("BGFX_SHADER_TYPE_VERTEX=1");
break;
default:
fprintf(stderr, "Unknown type: %s?!", type);
return EXIT_FAILURE;
}
bool compiled = false;
{
VaryingMap varyingMap;
std::string defaultVarying = dir + "varying.def.sc";
const char* varyingdef = _cmdLine.findOption("varyingdef", defaultVarying.c_str() );
File attribdef(varyingdef);
const char* parse = attribdef.getData();
if (NULL != parse
&& *parse != '\0')
{
preprocessor.addDependency(varyingdef);
}
else
{
fprintf(stderr, "ERROR: Failed to parse varying def file: \"%s\" No input/output semantics will be generated in the code!\n", varyingdef);
}
while (NULL != parse
&& *parse != '\0')
{
parse = bx::strws(parse);
const char* eol = strchr(parse, ';');
if (NULL == eol)
{
eol = bx::streol(parse);
}
if (NULL != eol)
{
const char* precision = NULL;
const char* interpolation = NULL;
const char* typen = parse;
if (0 == strncmp(typen, "lowp", 4)
|| 0 == strncmp(typen, "mediump", 7)
|| 0 == strncmp(typen, "highp", 5) )
{
precision = typen;
typen = parse = bx::strws(bx::strword(parse) );
}
if (0 == strncmp(typen, "flat", 4)
|| 0 == strncmp(typen, "smooth", 6)
|| 0 == strncmp(typen, "noperspective", 13) )
{
interpolation = typen;
typen = parse = bx::strws(bx::strword(parse) );
}
const char* name = parse = bx::strws(bx::strword(parse) );
const char* column = parse = bx::strws(bx::strword(parse) );
const char* semantics = parse = bx::strws((*parse == ':' ? ++parse : parse));
const char* assign = parse = bx::strws(bx::strword(parse) );
const char* init = parse = bx::strws((*parse == '=' ? ++parse : parse));
if (typen < eol
&& name < eol
&& column < eol
&& ':' == *column
&& semantics < eol)
{
Varying var;
if (NULL != precision)
{
var.m_precision.assign(precision, bx::strword(precision)-precision);
}
if (NULL != interpolation)
{
var.m_interpolation.assign(interpolation, bx::strword(interpolation)-interpolation);
}
var.m_type.assign(typen, bx::strword(typen)-typen);
var.m_name.assign(name, bx::strword(name)-name);
var.m_semantics.assign(semantics, bx::strword(semantics)-semantics);
if (d3d == 9
&& var.m_semantics == "BITANGENT")
{
var.m_semantics = "BINORMAL";
}
if (assign < eol
&& '=' == *assign
&& init < eol)
{
var.m_init.assign(init, eol-init);
}
varyingMap.insert(std::make_pair(var.m_name, var) );
}
parse = bx::strws(bx::strnl(eol) );
}
}
InOut shaderInputs;
InOut shaderOutputs;
uint32_t inputHash = 0;
uint32_t outputHash = 0;
char* data;
char* input;
{
const size_t padding = 1024;
long int r_offset = _reader->seek();
_reader->seek(0, bx::Whence::End);
uint32_t size = (uint32_t)_reader->seek(0, bx::Whence::End);
_reader->seek(r_offset, bx::Whence::Begin);
bx::Error err;
data = new char[size+padding+1];
_reader->read(data, size - r_offset, &err);
// Compiler generates "error X3000: syntax error: unexpected end of file"
// if input doesn't have empty line at EOF.
data[size] = '\n';
memset(&data[size+1], 0, padding);
input = const_cast<char*>(bx::strws(data) );
while (input[0] == '$')
{
const char* str = bx::strws(input+1);
const char* eol = bx::streol(str);
const char* nl = bx::strnl(eol);
input = const_cast<char*>(nl);
if (0 == strncmp(str, "input", 5) )
{
str += 5;
const char* comment = strstr(str, "//");
eol = NULL != comment && comment < eol ? comment : eol;
inputHash = parseInOut(shaderInputs, str, eol);
}
else if (0 == strncmp(str, "output", 6) )
{
str += 6;
const char* comment = strstr(str, "//");
eol = NULL != comment && comment < eol ? comment : eol;
outputHash = parseInOut(shaderOutputs, str, eol);
}
else if (0 == strncmp(str, "raw", 3) )
{
raw = true;
str += 3;
}
input = const_cast<char*>(bx::strws(input) );
}
if (!raw)
{
// To avoid commented code being recognized as used feature,
// first preprocess pass is used to strip all comments before
// substituting code.
preprocessor.run(input);
delete [] data;
size = (uint32_t)preprocessor.m_preprocessed.size();
data = new char[size+padding+1];
memcpy(data, preprocessor.m_preprocessed.c_str(), size);
memset(&data[size], 0, padding+1);
input = data;
}
}
if (raw)
{
if ('f' == shaderType)
{
bx::write(_writer, BGFX_CHUNK_MAGIC_FSH);
bx::write(_writer, inputHash);
}
else if ('v' == shaderType)
{
bx::write(_writer, BGFX_CHUNK_MAGIC_VSH);
bx::write(_writer, outputHash);
}
else
{
bx::write(_writer, BGFX_CHUNK_MAGIC_CSH);
bx::write(_writer, outputHash);
}
if (0 != glsl)
{
bx::write(_writer, uint16_t(0) );
uint32_t shaderSize = (uint32_t)strlen(input);
bx::write(_writer, shaderSize);
bx::write(_writer, input, shaderSize);
bx::write(_writer, uint8_t(0) );
compiled = true;
}
else
{
compiled = compileHLSLShader(_cmdLine, d3d, input, _writer);
}
}
else if ('c' == shaderType) // Compute
{
char* entry = strstr(input, "void main()");
if (NULL == entry)
{
fprintf(stderr, "Shader entry point 'void main()' is not found.\n");
}
else
{
if (0 != glsl
|| 0 != essl
|| 0 != metal)
{
}
else
{
preprocessor.writef(
"#define lowp\n"
"#define mediump\n"
"#define highp\n"
"#define ivec2 int2\n"
"#define ivec3 int3\n"
"#define ivec4 int4\n"
"#define uvec2 uint2\n"
"#define uvec3 uint3\n"
"#define uvec4 uint4\n"
"#define vec2 float2\n"
"#define vec3 float3\n"
"#define vec4 float4\n"
"#define mat2 float2x2\n"
"#define mat3 float3x3\n"
"#define mat4 float4x4\n"
);
entry[4] = '_';
preprocessor.writef("#define void_main()");
preprocessor.writef(" \\\n\tvoid main(");
uint32_t arg = 0;
const bool hasLocalInvocationID = NULL != strstr(input, "gl_LocalInvocationID");
const bool hasLocalInvocationIndex = NULL != strstr(input, "gl_LocalInvocationIndex");
const bool hasGlobalInvocationID = NULL != strstr(input, "gl_GlobalInvocationID");
const bool hasWorkGroupID = NULL != strstr(input, "gl_WorkGroupID");
if (hasLocalInvocationID)
{
preprocessor.writef(
" \\\n\t%sint3 gl_LocalInvocationID : SV_GroupThreadID"
, arg++ > 0 ? ", " : " "
);
}
if (hasLocalInvocationIndex)
{
preprocessor.writef(
" \\\n\t%sint gl_LocalInvocationIndex : SV_GroupIndex"
, arg++ > 0 ? ", " : " "
);
}
if (hasGlobalInvocationID)
{
preprocessor.writef(
" \\\n\t%sint3 gl_GlobalInvocationID : SV_DispatchThreadID"
, arg++ > 0 ? ", " : " "
);
}
if (hasWorkGroupID)
{
preprocessor.writef(
" \\\n\t%sint3 gl_WorkGroupID : SV_GroupID"
, arg++ > 0 ? ", " : " "
);
}
preprocessor.writef(
" \\\n\t)\n"
);
}
if (preprocessor.run(input) )
{
BX_TRACE("Input file: %s", filePath);
BX_TRACE("Output file: %s", outFilePath != NULL ? outFilePath : "NULL");
if (preprocessOnly)
{
bx::Error err;
_writer->write(preprocessor.m_preprocessed.c_str(), (int32_t)preprocessor.m_preprocessed.size(), &err);
return EXIT_SUCCESS;
}
{
bx::write(_writer, BGFX_CHUNK_MAGIC_CSH);
bx::write(_writer, outputHash);
if (0 != glsl
|| 0 != essl)
{
std::string code;
if (essl)
{
bx::stringPrintf(code, "#version 310 es\n");
}
else
{
bx::stringPrintf(code, "#version %d\n", glsl == 0 ? 430 : glsl);
}
code += preprocessor.m_preprocessed;
#if 1
bx::write(_writer, uint16_t(0) );
uint32_t shaderSize = (uint32_t)code.size();
bx::write(_writer, shaderSize);
bx::write(_writer, code.c_str(), shaderSize);
bx::write(_writer, uint8_t(0) );
compiled = true;
#else
compiled = compileGLSLShader(_cmdLine, essl, code, _writer);
#endif // 0
}
else
{
compiled = compileHLSLShader(_cmdLine, d3d, preprocessor.m_preprocessed, _writer);
}
}
if (compiled && depends)
{
if (outFilePath == NULL)
{
fprintf(stderr, "Cannot create depends file: no output file specified!\n");
return EXIT_FAILURE;
}
else
{
std::string ofp = outFilePath;
ofp += ".d";
bx::CrtFileWriter writer;
bx::Error err;
if (0 == writer.open(ofp.c_str(), false, &err) )
{
writef(&writer, "%s : %s\n", outFilePath, preprocessor.m_depends.c_str() );
writer.close();
}
}
}
}
}
}
else // Vertex/Fragment
{
char* entry = strstr(input, "void main()");
if (NULL == entry)
{
fprintf(stderr, "Shader entry point 'void main()' is not found.\n");
}
else
{
if (0 != glsl
|| 0 != essl
|| 0 != metal)
{
if (120 == glsl
|| 0 != essl)
{
preprocessor.writef(
"#define ivec2 vec2\n"
"#define ivec3 vec3\n"
"#define ivec4 vec4\n"
);
}
if (0 == essl)
{
// bgfx shadow2D/Proj behave like EXT_shadow_samplers
// not as GLSL language 1.2 specs shadow2D/Proj.
preprocessor.writef(
"#define shadow2D(_sampler, _coord) bgfxShadow2D(_sampler, _coord).x\n"
"#define shadow2DProj(_sampler, _coord) bgfxShadow2DProj(_sampler, _coord).x\n"
);
}
for (InOut::const_iterator it = shaderInputs.begin(), itEnd = shaderInputs.end(); it != itEnd; ++it)
{
VaryingMap::const_iterator varyingIt = varyingMap.find(*it);
if (varyingIt != varyingMap.end() )
{
const Varying& var = varyingIt->second;
const char* name = var.m_name.c_str();
if (0 == strncmp(name, "a_", 2)
|| 0 == strncmp(name, "i_", 2) )
{
preprocessor.writef("attribute %s %s %s %s;\n"
, var.m_precision.c_str()
, var.m_interpolation.c_str()
, var.m_type.c_str()
, name
);
}
else
{
preprocessor.writef("%s varying %s %s %s;\n"
, var.m_interpolation.c_str()
, var.m_precision.c_str()
, var.m_type.c_str()
, name
);
}
}
}
for (InOut::const_iterator it = shaderOutputs.begin(), itEnd = shaderOutputs.end(); it != itEnd; ++it)
{
VaryingMap::const_iterator varyingIt = varyingMap.find(*it);
if (varyingIt != varyingMap.end() )
{
const Varying& var = varyingIt->second;
preprocessor.writef("%s varying %s %s;\n"
, var.m_interpolation.c_str()
, var.m_type.c_str()
, var.m_name.c_str()
);
}
}
}
else
{
preprocessor.writef(
"#define lowp\n"
"#define mediump\n"
"#define highp\n"
"#define ivec2 int2\n"
"#define ivec3 int3\n"
"#define ivec4 int4\n"
"#define uvec2 uint2\n"
"#define uvec3 uint3\n"
"#define uvec4 uint4\n"
"#define vec2 float2\n"
"#define vec3 float3\n"
"#define vec4 float4\n"
"#define mat2 float2x2\n"
"#define mat3 float3x3\n"
"#define mat4 float4x4\n"
);
if (hlsl < 4)
{
preprocessor.writef(
"#define flat\n"
"#define smooth\n"
"#define noperspective\n"
);
}
entry[4] = '_';
if ('f' == shaderType)
{
const char* brace = strstr(entry, "{");
if (NULL != brace)
{
strins(const_cast<char*>(brace+1), "\nvec4 bgfx_VoidFrag;\n");
}
const bool hasFragCoord = NULL != strstr(input, "gl_FragCoord") || hlsl > 3 || hlsl == 2;
const bool hasFragDepth = NULL != strstr(input, "gl_FragDepth");
const bool hasFrontFacing = NULL != strstr(input, "gl_FrontFacing");
const bool hasPrimitiveId = NULL != strstr(input, "gl_PrimitiveID");
bool hasFragData[8] = {};
uint32_t numFragData = 0;
for (uint32_t ii = 0; ii < BX_COUNTOF(hasFragData); ++ii)
{
char temp[32];
bx::snprintf(temp, BX_COUNTOF(temp), "gl_FragData[%d]", ii);
hasFragData[ii] = NULL != strstr(input, temp);
numFragData += hasFragData[ii];
}
if (0 == numFragData)
{
// GL errors when both gl_FragColor and gl_FragData is used.
// This will trigger the same error with HLSL compiler too.
preprocessor.writef("#define gl_FragColor gl_FragData_0_\n");
}
preprocessor.writef("#define void_main()");
preprocessor.writef(" \\\n\tvoid main(");
uint32_t arg = 0;
if (hasFragCoord)
{
preprocessor.writef(" \\\n\tvec4 gl_FragCoord : SV_POSITION");
++arg;
}
for (InOut::const_iterator it = shaderInputs.begin(), itEnd = shaderInputs.end(); it != itEnd; ++it)
{
VaryingMap::const_iterator varyingIt = varyingMap.find(*it);
if (varyingIt != varyingMap.end() )
{
const Varying& var = varyingIt->second;
preprocessor.writef(" \\\n\t%s%s %s %s : %s"
, arg++ > 0 ? ", " : " "
, interpolationDx11(var.m_interpolation.c_str() )
, var.m_type.c_str()
, var.m_name.c_str()
, var.m_semantics.c_str()
);
}
}
addFragData(preprocessor, input, 0, arg++ > 0);
const uint32_t maxRT = d3d > 9 ? BX_COUNTOF(hasFragData) : 4;
for (uint32_t ii = 1; ii < BX_COUNTOF(hasFragData); ++ii)
{
if (ii < maxRT)
{
if (hasFragData[ii])
{
addFragData(preprocessor, input, ii, arg++ > 0);
}
}
else
{
voidFragData(input, ii);
}
}
if (hasFragDepth)
{
preprocessor.writef(
" \\\n\t%sout float gl_FragDepth : SV_DEPTH"
, arg++ > 0 ? ", " : " "
);
}
if (hasFrontFacing
&& hlsl >= 3)
{
preprocessor.writef(
" \\\n\t%sfloat __vface : VFACE"
, arg++ > 0 ? ", " : " "
);
}
if (hasPrimitiveId)
{
if (d3d > 9)
{
preprocessor.writef(
" \\\n\t%suint gl_PrimitiveID : SV_PrimitiveID"
, arg++ > 0 ? ", " : " "
);
}
else
{
fprintf(stderr, "PrimitiveID builtin is not supported by this D3D9 HLSL.\n");
return EXIT_FAILURE;
}
}
preprocessor.writef(
" \\\n\t)\n"
);
if (hasFrontFacing)
{
if (hlsl >= 3)
{
preprocessor.writef(
"#define gl_FrontFacing (__vface <= 0.0)\n"
);
}
else
{
preprocessor.writef(
"#define gl_FrontFacing false\n"
);
}
}
}
else if ('v' == shaderType)
{
const char* brace = strstr(entry, "{");
if (NULL != brace)
{
const char* end = bx::strmb(brace, '{', '}');
if (NULL != end)
{
strins(const_cast<char*>(end), "__RETURN__;\n");
}
}
preprocessor.writef(
"struct Output\n"
"{\n"
"\tvec4 gl_Position : SV_POSITION;\n"
"#define gl_Position _varying_.gl_Position\n"
);
for (InOut::const_iterator it = shaderOutputs.begin(), itEnd = shaderOutputs.end(); it != itEnd; ++it)
{
VaryingMap::const_iterator varyingIt = varyingMap.find(*it);
if (varyingIt != varyingMap.end() )
{
const Varying& var = varyingIt->second;
preprocessor.writef("\t%s %s : %s;\n", var.m_type.c_str(), var.m_name.c_str(), var.m_semantics.c_str() );
preprocessor.writef("#define %s _varying_.%s\n", var.m_name.c_str(), var.m_name.c_str() );
}
}
preprocessor.writef(
"};\n"
);
preprocessor.writef("#define void_main() \\\n");
preprocessor.writef("Output main(");
bool first = true;
for (InOut::const_iterator it = shaderInputs.begin(), itEnd = shaderInputs.end(); it != itEnd; ++it)
{
VaryingMap::const_iterator varyingIt = varyingMap.find(*it);
if (varyingIt != varyingMap.end() )
{
const Varying& var = varyingIt->second;
preprocessor.writef("%s%s %s : %s\\\n", first ? "" : "\t, ", var.m_type.c_str(), var.m_name.c_str(), var.m_semantics.c_str() );
first = false;
}
}
preprocessor.writef(
") \\\n"
"{ \\\n"
"\tOutput _varying_;"
);
for (InOut::const_iterator it = shaderOutputs.begin(), itEnd = shaderOutputs.end(); it != itEnd; ++it)
{
VaryingMap::const_iterator varyingIt = varyingMap.find(*it);
if (varyingIt != varyingMap.end() )
{
const Varying& var = varyingIt->second;
preprocessor.writef(" \\\n\t%s", var.m_name.c_str() );
if (!var.m_init.empty() )
{
preprocessor.writef(" = %s", var.m_init.c_str() );
}
preprocessor.writef(";");
}
}
preprocessor.writef(
"\n#define __RETURN__ \\\n"
"\t} \\\n"
"\treturn _varying_"
);
}
}
if (preprocessor.run(input) )
{
BX_TRACE("Input file: %s", filePath);
BX_TRACE("Output file: %s", outFilePath != NULL ? outFilePath : "NULL");
if (preprocessOnly)
{
if (0 != glsl)
{
if (NULL == profile)
{
writef(_writer
, "#ifdef GL_ES\n"
"precision highp float;\n"
"#endif // GL_ES\n\n"
);
}
}
bx::Error err;
_writer->write(preprocessor.m_preprocessed.c_str(), (int32_t)preprocessor.m_preprocessed.size(), &err);
return EXIT_SUCCESS;
}
{
if ('f' == shaderType)
{
bx::write(_writer, BGFX_CHUNK_MAGIC_FSH);
bx::write(_writer, inputHash);
}
else if ('v' == shaderType)
{
bx::write(_writer, BGFX_CHUNK_MAGIC_VSH);
bx::write(_writer, outputHash);
}
else
{
bx::write(_writer, BGFX_CHUNK_MAGIC_CSH);
bx::write(_writer, outputHash);
}
if (0 != glsl
|| 0 != essl
|| 0 != metal)
{
std::string code;
bool hasTextureLod = NULL != bx::findIdentifierMatch(input, s_ARB_shader_texture_lod /*EXT_shader_texture_lod*/);
if (0 == essl)
{
const bool need130 = 120 == glsl
&& bx::findIdentifierMatch(input, s_130)
;
if (0 != metal)
{
bx::stringPrintf(code, "#version 120\n");
}
else
{
bx::stringPrintf(code, "#version %s\n", need130 ? "130" : profile);
}
bx::stringPrintf(code
, "#define bgfxShadow2D shadow2D\n"
"#define bgfxShadow2DProj shadow2DProj\n"
);
if (hasTextureLod
&& 130 > glsl)
{
bx::stringPrintf(code
, "#extension GL_ARB_shader_texture_lod : enable\n"
);
}
}
else
{
// Pretend that all extensions are available.
// This will be stripped later.
if (hasTextureLod)
{
bx::stringPrintf(code
, "#extension GL_EXT_shader_texture_lod : enable\n"
"#define texture2DLod texture2DLodEXT\n"
"#define texture2DProjLod texture2DProjLodEXT\n"
"#define textureCubeLod textureCubeLodEXT\n"
// "#define texture2DGrad texture2DGradEXT\n"
// "#define texture2DProjGrad texture2DProjGradEXT\n"
// "#define textureCubeGrad textureCubeGradEXT\n"
);
}
if (NULL != bx::findIdentifierMatch(input, s_OES_standard_derivatives) )
{
bx::stringPrintf(code, "#extension GL_OES_standard_derivatives : enable\n");
}
if (NULL != bx::findIdentifierMatch(input, s_OES_texture_3D) )
{
bx::stringPrintf(code, "#extension GL_OES_texture_3D : enable\n");
}
if (NULL != bx::findIdentifierMatch(input, s_EXT_shadow_samplers) )
{
bx::stringPrintf(code
, "#extension GL_EXT_shadow_samplers : enable\n"
"#define shadow2D shadow2DEXT\n"
"#define shadow2DProj shadow2DProjEXT\n"
);
}
if (NULL != bx::findIdentifierMatch(input, "gl_FragDepth") )
{
bx::stringPrintf(code
, "#extension GL_EXT_frag_depth : enable\n"
"#define gl_FragDepth gl_FragDepthEXT\n"
);
}
}
code += preprocessor.m_preprocessed;
compiled = compileGLSLShader(_cmdLine
, metal ? BX_MAKEFOURCC('M', 'T', 'L', 0) : essl
, code
, _writer
);
}
else
{
compiled = compileHLSLShader(_cmdLine
, d3d
, preprocessor.m_preprocessed
, _writer
);
}
}
if (compiled && depends)
{
if (outFilePath == NULL)
{
fprintf(stderr, "Cannot create depends file: no output file specified!\n");
return EXIT_FAILURE;
}
else
{
std::string ofp = outFilePath;
ofp += ".d";
bx::CrtFileWriter writer;
bx::Error err;
if (0 == writer.open(ofp.c_str(), false, &err) )
{
writef(&writer, "%s : %s\n", outFilePath, preprocessor.m_depends.c_str() );
writer.close();
}
}
}
}
}
}
delete [] data;
}
if (compiled)
{
return EXIT_SUCCESS;
}
if (NULL != outFilePath)
{
remove(outFilePath);
}
fprintf(stderr, "Failed to build shader.\n");
return EXIT_FAILURE;
}