The Tor Browser: gfx/angle/src/compiler/ShaderLang.cpp@141e0f1194b1

     1 //

     2 // Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.

     3 // Use of this source code is governed by a BSD-style license that can be

     4 // found in the LICENSE file.

     5 //

     7 //

     8 // Implement the top-level of interface to the compiler,

     9 // as defined in ShaderLang.h

    10 //

    12 #include "GLSLANG/ShaderLang.h"

    14 #include "compiler/InitializeDll.h"

    15 #include "compiler/preprocessor/length_limits.h"

    16 #include "compiler/ShHandle.h"

    17 #include "compiler/TranslatorHLSL.h"

    19 //

    20 // This is the platform independent interface between an OGL driver

    21 // and the shading language compiler.

    22 //

    24 static bool checkActiveUniformAndAttribMaxLengths(const ShHandle handle,

    25                                                   size_t expectedValue)

    26 {

    27     size_t activeUniformLimit = 0;

    28     ShGetInfo(handle, SH_ACTIVE_UNIFORM_MAX_LENGTH, &activeUniformLimit);

    29     size_t activeAttribLimit = 0;

    30     ShGetInfo(handle, SH_ACTIVE_ATTRIBUTE_MAX_LENGTH, &activeAttribLimit);

    31     return (expectedValue == activeUniformLimit && expectedValue == activeAttribLimit);

    32 }

    34 static bool checkMappedNameMaxLength(const ShHandle handle, size_t expectedValue)

    35 {

    36     size_t mappedNameMaxLength = 0;

    37     ShGetInfo(handle, SH_MAPPED_NAME_MAX_LENGTH, &mappedNameMaxLength);

    38     return (expectedValue == mappedNameMaxLength);

    39 }

    41 static void getVariableInfo(ShShaderInfo varType,

    42                             const ShHandle handle,

    43                             int index,

    44                             size_t* length,

    45                             int* size,

    46                             ShDataType* type,

    47                             char* name,

    48                             char* mappedName)

    49 {

    50     if (!handle || !size || !type || !name)

    51         return;

    52     ASSERT((varType == SH_ACTIVE_ATTRIBUTES) ||

    53            (varType == SH_ACTIVE_UNIFORMS));

    55     TShHandleBase* base = reinterpret_cast<TShHandleBase*>(handle);

    56     TCompiler* compiler = base->getAsCompiler();

    57     if (compiler == 0)

    58         return;

    60     const TVariableInfoList& varList = varType == SH_ACTIVE_ATTRIBUTES ?

    61         compiler->getAttribs() : compiler->getUniforms();

    62     if (index < 0 || index >= static_cast<int>(varList.size()))

    63         return;

    65     const TVariableInfo& varInfo = varList[index];

    66     if (length) *length = varInfo.name.size();

    67     *size = varInfo.size;

    68     *type = varInfo.type;

    70     // This size must match that queried by

    71     // SH_ACTIVE_UNIFORM_MAX_LENGTH and SH_ACTIVE_ATTRIBUTE_MAX_LENGTH

    72     // in ShGetInfo, below.

    73     size_t activeUniformAndAttribLength = 1 + MAX_SYMBOL_NAME_LEN;

    74     ASSERT(checkActiveUniformAndAttribMaxLengths(handle, activeUniformAndAttribLength));

    75     strncpy(name, varInfo.name.c_str(), activeUniformAndAttribLength);

    76     name[activeUniformAndAttribLength - 1] = 0;

    77     if (mappedName) {

    78         // This size must match that queried by

    79         // SH_MAPPED_NAME_MAX_LENGTH in ShGetInfo, below.

    80         size_t maxMappedNameLength = 1 + MAX_SYMBOL_NAME_LEN;

    81         ASSERT(checkMappedNameMaxLength(handle, maxMappedNameLength));

    82         strncpy(mappedName, varInfo.mappedName.c_str(), maxMappedNameLength);

    83         mappedName[maxMappedNameLength - 1] = 0;

    84     }

    85 }

    87 //

    88 // Driver must call this first, once, before doing any other compiler operations.

    89 // Subsequent calls to this function are no-op.

    90 //

    91 int ShInitialize()

    92 {

    93     static const bool kInitialized = InitProcess();

    94     return kInitialized ? 1 : 0;

    95 }

    97 //

    98 // Cleanup symbol tables

    99 //

   100 int ShFinalize()

   101 {

   102     DetachProcess();

   103     return 1;

   104 }

   106 //

   107 // Initialize built-in resources with minimum expected values.

   108 //

   109 void ShInitBuiltInResources(ShBuiltInResources* resources)

   110 {

   111     // Constants.

   112     resources->MaxVertexAttribs = 8;

   113     resources->MaxVertexUniformVectors = 128;

   114     resources->MaxVaryingVectors = 8;

   115     resources->MaxVertexTextureImageUnits = 0;

   116     resources->MaxCombinedTextureImageUnits = 8;

   117     resources->MaxTextureImageUnits = 8;

   118     resources->MaxFragmentUniformVectors = 16;

   119     resources->MaxDrawBuffers = 1;

   121     // Extensions.

   122     resources->OES_standard_derivatives = 0;

   123     resources->OES_EGL_image_external = 0;

   124     resources->ARB_texture_rectangle = 0;

   125     resources->EXT_draw_buffers = 0;

   126     resources->EXT_frag_depth = 0;

   128     // Disable highp precision in fragment shader by default.

   129     resources->FragmentPrecisionHigh = 0;

   131     // Disable name hashing by default.

   132     resources->HashFunction = NULL;

   134     resources->ArrayIndexClampingStrategy = SH_CLAMP_WITH_CLAMP_INTRINSIC;

   135 }

   137 //

   138 // Driver calls these to create and destroy compiler objects.

   139 //

   140 ShHandle ShConstructCompiler(ShShaderType type, ShShaderSpec spec,

   141                              ShShaderOutput output,

   142                              const ShBuiltInResources* resources)

   143 {

   144     TShHandleBase* base = static_cast<TShHandleBase*>(ConstructCompiler(type, spec, output));

   145     TCompiler* compiler = base->getAsCompiler();

   146     if (compiler == 0)

   147         return 0;

   149     // Generate built-in symbol table.

   150     if (!compiler->Init(*resources)) {

   151         ShDestruct(base);

   152         return 0;

   153     }

   155     return reinterpret_cast<void*>(base);

   156 }

   158 void ShDestruct(ShHandle handle)

   159 {

   160     if (handle == 0)

   161         return;

   163     TShHandleBase* base = static_cast<TShHandleBase*>(handle);

   165     if (base->getAsCompiler())

   166         DeleteCompiler(base->getAsCompiler());

   167 }

   169 //

   170 // Do an actual compile on the given strings.  The result is left

   171 // in the given compile object.

   172 //

   173 // Return:  The return value of ShCompile is really boolean, indicating

   174 // success or failure.

   175 //

   176 int ShCompile(

   177     const ShHandle handle,

   178     const char* const shaderStrings[],

   179     size_t numStrings,

   180     int compileOptions)

   181 {

   182     if (handle == 0)

   183         return 0;

   185     TShHandleBase* base = reinterpret_cast<TShHandleBase*>(handle);

   186     TCompiler* compiler = base->getAsCompiler();

   187     if (compiler == 0)

   188         return 0;

   190     bool success = compiler->compile(shaderStrings, numStrings, compileOptions);

   191     return success ? 1 : 0;

   192 }

   194 void ShGetInfo(const ShHandle handle, ShShaderInfo pname, size_t* params)

   195 {

   196     if (!handle || !params)

   197         return;

   199     TShHandleBase* base = static_cast<TShHandleBase*>(handle);

   200     TCompiler* compiler = base->getAsCompiler();

   201     if (!compiler) return;

   203     switch(pname)

   204     {

   205     case SH_INFO_LOG_LENGTH:

   206         *params = compiler->getInfoSink().info.size() + 1;

   207         break;

   208     case SH_OBJECT_CODE_LENGTH:

   209         *params = compiler->getInfoSink().obj.size() + 1;

   210         break;

   211     case SH_ACTIVE_UNIFORMS:

   212         *params = compiler->getUniforms().size();

   213         break;

   214     case SH_ACTIVE_UNIFORM_MAX_LENGTH:

   215         *params = 1 +  MAX_SYMBOL_NAME_LEN;

   216         break;

   217     case SH_ACTIVE_ATTRIBUTES:

   218         *params = compiler->getAttribs().size();

   219         break;

   220     case SH_ACTIVE_ATTRIBUTE_MAX_LENGTH:

   221         *params = 1 + MAX_SYMBOL_NAME_LEN;

   222         break;

   223     case SH_MAPPED_NAME_MAX_LENGTH:

   224         // Use longer length than MAX_SHORTENED_IDENTIFIER_SIZE to

   225         // handle array and struct dereferences.

   226         *params = 1 + MAX_SYMBOL_NAME_LEN;

   227         break;

   228     case SH_NAME_MAX_LENGTH:

   229         *params = 1 + MAX_SYMBOL_NAME_LEN;

   230         break;

   231     case SH_HASHED_NAME_MAX_LENGTH:

   232         if (compiler->getHashFunction() == NULL) {

   233             *params = 0;

   234         } else {

   235             // 64 bits hashing output requires 16 bytes for hex

   236             // representation.

   237             const char HashedNamePrefix[] = HASHED_NAME_PREFIX;

   238             *params = 16 + sizeof(HashedNamePrefix);

   239         }

   240         break;

   241     case SH_HASHED_NAMES_COUNT:

   242         *params = compiler->getNameMap().size();

   243         break;

   244     default: UNREACHABLE();

   245     }

   246 }

   248 //

   249 // Return any compiler log of messages for the application.

   250 //

   251 void ShGetInfoLog(const ShHandle handle, char* infoLog)

   252 {

   253     if (!handle || !infoLog)

   254         return;

   256     TShHandleBase* base = static_cast<TShHandleBase*>(handle);

   257     TCompiler* compiler = base->getAsCompiler();

   258     if (!compiler) return;

   260     TInfoSink& infoSink = compiler->getInfoSink();

   261     strcpy(infoLog, infoSink.info.c_str());

   262 }

   264 //

   265 // Return any object code.

   266 //

   267 void ShGetObjectCode(const ShHandle handle, char* objCode)

   268 {

   269     if (!handle || !objCode)

   270         return;

   272     TShHandleBase* base = static_cast<TShHandleBase*>(handle);

   273     TCompiler* compiler = base->getAsCompiler();

   274     if (!compiler) return;

   276     TInfoSink& infoSink = compiler->getInfoSink();

   277     strcpy(objCode, infoSink.obj.c_str());

   278 }

   280 void ShGetActiveAttrib(const ShHandle handle,

   281                        int index,

   282                        size_t* length,

   283                        int* size,

   284                        ShDataType* type,

   285                        char* name,

   286                        char* mappedName)

   287 {

   288     getVariableInfo(SH_ACTIVE_ATTRIBUTES,

   289                     handle, index, length, size, type, name, mappedName);

   290 }

   292 void ShGetActiveUniform(const ShHandle handle,

   293                         int index,

   294                         size_t* length,

   295                         int* size,

   296                         ShDataType* type,

   297                         char* name,

   298                         char* mappedName)

   299 {

   300     getVariableInfo(SH_ACTIVE_UNIFORMS,

   301                     handle, index, length, size, type, name, mappedName);

   302 }

   304 void ShGetNameHashingEntry(const ShHandle handle,

   305                            int index,

   306                            char* name,

   307                            char* hashedName)

   308 {

   309     if (!handle || !name || !hashedName || index < 0)

   310         return;

   312     TShHandleBase* base = static_cast<TShHandleBase*>(handle);

   313     TCompiler* compiler = base->getAsCompiler();

   314     if (!compiler) return;

   316     const NameMap& nameMap = compiler->getNameMap();

   317     if (index >= static_cast<int>(nameMap.size()))

   318         return;

   320     NameMap::const_iterator it = nameMap.begin();

   321     for (int i = 0; i < index; ++i)

   322         ++it;

   324     size_t len = it->first.length() + 1;

   325     size_t max_len = 0;

   326     ShGetInfo(handle, SH_NAME_MAX_LENGTH, &max_len);

   327     if (len > max_len) {

   328         ASSERT(false);

   329         len = max_len;

   330     }

   331     strncpy(name, it->first.c_str(), len);

   332     // To be on the safe side in case the source is longer than expected.

   333     name[len - 1] = '\0';

   335     len = it->second.length() + 1;

   336     max_len = 0;

   337     ShGetInfo(handle, SH_HASHED_NAME_MAX_LENGTH, &max_len);

   338     if (len > max_len) {

   339         ASSERT(false);

   340         len = max_len;

   341     }

   342     strncpy(hashedName, it->second.c_str(), len);

   343     // To be on the safe side in case the source is longer than expected.

   344     hashedName[len - 1] = '\0';

   345 }

   347 void ShGetInfoPointer(const ShHandle handle, ShShaderInfo pname, void** params)

   348 {

   349     if (!handle || !params)

   350         return;

   352     TShHandleBase* base = static_cast<TShHandleBase*>(handle);

   353     TranslatorHLSL* translator = base->getAsTranslatorHLSL();

   354     if (!translator) return;

   356     switch(pname)

   357     {

   358     case SH_ACTIVE_UNIFORMS_ARRAY:

   359         *params = (void*)&translator->getUniforms();

   360         break;

   361     default: UNREACHABLE();

   362     }

   363 }

The Tor Browser / file revision

gfx/angle/src/compiler/ShaderLang.cpp@141e0f1194b1

gfx/angle/src/compiler/ShaderLang.cpp