ShaderLang.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>
src/compiler/translator/ShaderLang.cpp
//
// Copyright 2002 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

//
// Implement the top-level of interface to the compiler,
// as defined in ShaderLang.h
//

#include "GLSLANG/ShaderLang.h"

#include "compiler/translator/Compiler.h"
#include "compiler/translator/InitializeDll.h"
#include "compiler/translator/length_limits.h"
#ifdef ANGLE_ENABLE_HLSL
#    include "compiler/translator/TranslatorHLSL.h"
#endif  // ANGLE_ENABLE_HLSL
#include "angle_gl.h"
#include "compiler/translator/VariablePacker.h"

namespace sh
{

namespace
{

bool isInitialized = false;

//
// This is the platform independent interface between an OGL driver
// and the shading language compiler.
//

template <typename VarT>
const std::vector<VarT> *GetVariableList(const TCompiler *compiler);

template <>
const std::vector<Uniform> *GetVariableList(const TCompiler *compiler)
{
    return &compiler->getUniforms();
}

template <>
const std::vector<Varying> *GetVariableList(const TCompiler *compiler)
{
    switch (compiler->getShaderType())
    {
        case GL_VERTEX_SHADER:
            return &compiler->getOutputVaryings();
        case GL_FRAGMENT_SHADER:
            return &compiler->getInputVaryings();
        case GL_COMPUTE_SHADER:
            ASSERT(compiler->getOutputVaryings().empty() && compiler->getInputVaryings().empty());
            return &compiler->getOutputVaryings();
        // Since geometry shaders have both input and output varyings, we shouldn't call GetVaryings
        // on a geometry shader.
        default:
            return nullptr;
    }
}

template <>
const std::vector<Attribute> *GetVariableList(const TCompiler *compiler)
{
    return &compiler->getAttributes();
}

template <>
const std::vector<OutputVariable> *GetVariableList(const TCompiler *compiler)
{
    return &compiler->getOutputVariables();
}

template <>
const std::vector<InterfaceBlock> *GetVariableList(const TCompiler *compiler)
{
    return &compiler->getInterfaceBlocks();
}

TCompiler *GetCompilerFromHandle(ShHandle handle)
{
    if (!handle)
    {
        return nullptr;
    }

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    return base->getAsCompiler();
}

template <typename VarT>
const std::vector<VarT> *GetShaderVariables(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    if (!compiler)
    {
        return nullptr;
    }

    return GetVariableList<VarT>(compiler);
}

#ifdef ANGLE_ENABLE_HLSL
TranslatorHLSL *GetTranslatorHLSLFromHandle(ShHandle handle)
{
    if (!handle)
        return nullptr;
    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    return base->getAsTranslatorHLSL();
}
#endif  // ANGLE_ENABLE_HLSL

GLenum GetGeometryShaderPrimitiveTypeEnum(sh::TLayoutPrimitiveType primitiveType)
{
    switch (primitiveType)
    {
        case EptPoints:
            return GL_POINTS;
        case EptLines:
            return GL_LINES;
        case EptLinesAdjacency:
            return GL_LINES_ADJACENCY_EXT;
        case EptTriangles:
            return GL_TRIANGLES;
        case EptTrianglesAdjacency:
            return GL_TRIANGLES_ADJACENCY_EXT;

        case EptLineStrip:
            return GL_LINE_STRIP;
        case EptTriangleStrip:
            return GL_TRIANGLE_STRIP;

        case EptUndefined:
        default:
            UNREACHABLE();
            return GL_INVALID_VALUE;
    }
}

}  // anonymous namespace

//
// Driver must call this first, once, before doing any other compiler operations.
// Subsequent calls to this function are no-op.
//
bool Initialize()
{
    if (!isInitialized)
    {
        isInitialized = InitProcess();
    }
    return isInitialized;
}

//
// Cleanup symbol tables
//
bool Finalize()
{
    if (isInitialized)
    {
        DetachProcess();
        isInitialized = false;
    }
    return true;
}

//
// Initialize built-in resources with minimum expected values.
//
void InitBuiltInResources(ShBuiltInResources *resources)
{
    // Make comparable.
    memset(resources, 0, sizeof(*resources));

    // Constants.
    resources->MaxVertexAttribs             = 8;
    resources->MaxVertexUniformVectors      = 128;
    resources->MaxVaryingVectors            = 8;
    resources->MaxVertexTextureImageUnits   = 0;
    resources->MaxCombinedTextureImageUnits = 8;
    resources->MaxTextureImageUnits         = 8;
    resources->MaxFragmentUniformVectors    = 16;
    resources->MaxDrawBuffers               = 1;

    // Extensions.
    resources->OES_standard_derivatives                 = 0;
    resources->OES_EGL_image_external                   = 0;
    resources->OES_EGL_image_external_essl3             = 0;
    resources->NV_EGL_stream_consumer_external          = 0;
    resources->ARB_texture_rectangle                    = 0;
    resources->EXT_blend_func_extended                  = 0;
    resources->EXT_draw_buffers                         = 0;
    resources->EXT_frag_depth                           = 0;
    resources->EXT_shader_texture_lod                   = 0;
    resources->WEBGL_debug_shader_precision             = 0;
    resources->EXT_shader_framebuffer_fetch             = 0;
    resources->NV_shader_framebuffer_fetch              = 0;
    resources->ARM_shader_framebuffer_fetch             = 0;
    resources->OVR_multiview                            = 0;
    resources->OVR_multiview2                           = 0;
    resources->EXT_YUV_target                           = 0;
    resources->EXT_geometry_shader                      = 0;
    resources->OES_texture_storage_multisample_2d_array = 0;
    resources->OES_texture_3D                           = 0;
    resources->ANGLE_texture_multisample                = 0;
    resources->ANGLE_multi_draw                         = 0;
    resources->ANGLE_base_vertex_base_instance          = 0;

    resources->NV_draw_buffers = 0;

    // Disable highp precision in fragment shader by default.
    resources->FragmentPrecisionHigh = 0;

    // GLSL ES 3.0 constants.
    resources->MaxVertexOutputVectors  = 16;
    resources->MaxFragmentInputVectors = 15;
    resources->MinProgramTexelOffset   = -8;
    resources->MaxProgramTexelOffset   = 7;

    // Extensions constants.
    resources->MaxDualSourceDrawBuffers = 0;

    resources->MaxViewsOVR = 4;

    // Disable name hashing by default.
    resources->HashFunction = nullptr;

    resources->ArrayIndexClampingStrategy = SH_CLAMP_WITH_CLAMP_INTRINSIC;

    resources->MaxExpressionComplexity = 256;
    resources->MaxCallStackDepth       = 256;
    resources->MaxFunctionParameters   = 1024;

    // ES 3.1 Revision 4, 7.2 Built-in Constants

    // ES 3.1, Revision 4, 8.13 Texture minification
    // "The value of MIN_PROGRAM_TEXTURE_GATHER_OFFSET must be less than or equal to the value of
    // MIN_PROGRAM_TEXEL_OFFSET. The value of MAX_PROGRAM_TEXTURE_GATHER_OFFSET must be greater than
    // or equal to the value of MAX_PROGRAM_TEXEL_OFFSET"
    resources->MinProgramTextureGatherOffset = -8;
    resources->MaxProgramTextureGatherOffset = 7;

    resources->MaxImageUnits            = 4;
    resources->MaxVertexImageUniforms   = 0;
    resources->MaxFragmentImageUniforms = 0;
    resources->MaxComputeImageUniforms  = 4;
    resources->MaxCombinedImageUniforms = 4;

    resources->MaxUniformLocations = 1024;

    resources->MaxCombinedShaderOutputResources = 4;

    resources->MaxComputeWorkGroupCount[0] = 65535;
    resources->MaxComputeWorkGroupCount[1] = 65535;
    resources->MaxComputeWorkGroupCount[2] = 65535;
    resources->MaxComputeWorkGroupSize[0]  = 128;
    resources->MaxComputeWorkGroupSize[1]  = 128;
    resources->MaxComputeWorkGroupSize[2]  = 64;
    resources->MaxComputeUniformComponents = 512;
    resources->MaxComputeTextureImageUnits = 16;

    resources->MaxComputeAtomicCounters       = 8;
    resources->MaxComputeAtomicCounterBuffers = 1;

    resources->MaxVertexAtomicCounters   = 0;
    resources->MaxFragmentAtomicCounters = 0;
    resources->MaxCombinedAtomicCounters = 8;
    resources->MaxAtomicCounterBindings  = 1;

    resources->MaxVertexAtomicCounterBuffers   = 0;
    resources->MaxFragmentAtomicCounterBuffers = 0;
    resources->MaxCombinedAtomicCounterBuffers = 1;
    resources->MaxAtomicCounterBufferSize      = 32;

    resources->MaxUniformBufferBindings       = 32;
    resources->MaxShaderStorageBufferBindings = 4;

    resources->MaxGeometryUniformComponents     = 1024;
    resources->MaxGeometryUniformBlocks         = 12;
    resources->MaxGeometryInputComponents       = 64;
    resources->MaxGeometryOutputComponents      = 64;
    resources->MaxGeometryOutputVertices        = 256;
    resources->MaxGeometryTotalOutputComponents = 1024;
    resources->MaxGeometryTextureImageUnits     = 16;
    resources->MaxGeometryAtomicCounterBuffers  = 0;
    resources->MaxGeometryAtomicCounters        = 0;
    resources->MaxGeometryShaderStorageBlocks   = 0;
    resources->MaxGeometryShaderInvocations     = 32;
    resources->MaxGeometryImageUniforms         = 0;
}

//
// Driver calls these to create and destroy compiler objects.
//
ShHandle ConstructCompiler(sh::GLenum type,
                           ShShaderSpec spec,
                           ShShaderOutput output,
                           const ShBuiltInResources *resources)
{
    TShHandleBase *base = static_cast<TShHandleBase *>(ConstructCompiler(type, spec, output));
    if (base == nullptr)
    {
        return 0;
    }

    TCompiler *compiler = base->getAsCompiler();
    if (compiler == nullptr)
    {
        return 0;
    }

    // Generate built-in symbol table.
    if (!compiler->Init(*resources))
    {
        Destruct(base);
        return 0;
    }

    return base;
}

void Destruct(ShHandle handle)
{
    if (handle == 0)
        return;

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

    if (base->getAsCompiler())
        DeleteCompiler(base->getAsCompiler());
}

const std::string &GetBuiltInResourcesString(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);
    return compiler->getBuiltInResourcesString();
}

//
// Do an actual compile on the given strings.  The result is left
// in the given compile object.
//
// Return:  The return value of ShCompile is really boolean, indicating
// success or failure.
//
bool Compile(const ShHandle handle,
             const char *const shaderStrings[],
             size_t numStrings,
             ShCompileOptions compileOptions)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);

    return compiler->compile(shaderStrings, numStrings, compileOptions);
}

void ClearResults(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);
    compiler->clearResults();
}

int GetShaderVersion(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);
    return compiler->getShaderVersion();
}

ShShaderOutput GetShaderOutputType(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);
    return compiler->getOutputType();
}

//
// Return any compiler log of messages for the application.
//
const std::string &GetInfoLog(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);

    TInfoSink &infoSink = compiler->getInfoSink();
    return infoSink.info.str();
}

//
// Return any object code.
//
const std::string &GetObjectCode(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);

    TInfoSink &infoSink = compiler->getInfoSink();
    return infoSink.obj.str();
}

const std::map<std::string, std::string> *GetNameHashingMap(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    ASSERT(compiler);
    return &(compiler->getNameMap());
}

const std::vector<Uniform> *GetUniforms(const ShHandle handle)
{
    return GetShaderVariables<Uniform>(handle);
}

const std::vector<Varying> *GetInputVaryings(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    if (compiler == nullptr)
    {
        return nullptr;
    }
    return &compiler->getInputVaryings();
}

const std::vector<Varying> *GetOutputVaryings(const ShHandle handle)
{
    TCompiler *compiler = GetCompilerFromHandle(handle);
    if (compiler == nullptr)
    {
        return nullptr;
    }
    return &compiler->getOutputVaryings();
}

const std::vector<Varying> *GetVaryings(const ShHandle handle)
{
    return GetShaderVariables<Varying>(handle);
}

const std::vector<Attribute> *GetAttributes(const ShHandle handle)
{
    return GetShaderVariables<Attribute>(handle);
}

const std::vector<OutputVariable> *GetOutputVariables(const ShHandle handle)
{
    return GetShaderVariables<OutputVariable>(handle);
}

const std::vector<InterfaceBlock> *GetInterfaceBlocks(const ShHandle handle)
{
    return GetShaderVariables<InterfaceBlock>(handle);
}

const std::vector<InterfaceBlock> *GetUniformBlocks(const ShHandle handle)
{
    ASSERT(handle);
    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return &compiler->getUniformBlocks();
}

const std::vector<InterfaceBlock> *GetShaderStorageBlocks(const ShHandle handle)
{
    ASSERT(handle);
    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return &compiler->getShaderStorageBlocks();
}

WorkGroupSize GetComputeShaderLocalGroupSize(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return compiler->getComputeShaderLocalSize();
}

int GetVertexShaderNumViews(const ShHandle handle)
{
    ASSERT(handle);
    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return compiler->getNumViews();
}

bool CheckVariablesWithinPackingLimits(int maxVectors, const std::vector<ShaderVariable> &variables)
{
    return CheckVariablesInPackingLimits(maxVectors, variables);
}

bool GetShaderStorageBlockRegister(const ShHandle handle,
                                   const std::string &shaderStorageBlockName,
                                   unsigned int *indexOut)
{
#ifdef ANGLE_ENABLE_HLSL
    ASSERT(indexOut);

    TranslatorHLSL *translator = GetTranslatorHLSLFromHandle(handle);
    ASSERT(translator);

    if (!translator->hasShaderStorageBlock(shaderStorageBlockName))
    {
        return false;
    }

    *indexOut = translator->getShaderStorageBlockRegister(shaderStorageBlockName);
    return true;
#else
    return false;
#endif  // ANGLE_ENABLE_HLSL
}

bool GetUniformBlockRegister(const ShHandle handle,
                             const std::string &uniformBlockName,
                             unsigned int *indexOut)
{
#ifdef ANGLE_ENABLE_HLSL
    ASSERT(indexOut);

    TranslatorHLSL *translator = GetTranslatorHLSLFromHandle(handle);
    ASSERT(translator);

    if (!translator->hasUniformBlock(uniformBlockName))
    {
        return false;
    }

    *indexOut = translator->getUniformBlockRegister(uniformBlockName);
    return true;
#else
    return false;
#endif  // ANGLE_ENABLE_HLSL
}

const std::map<std::string, unsigned int> *GetUniformRegisterMap(const ShHandle handle)
{
#ifdef ANGLE_ENABLE_HLSL
    TranslatorHLSL *translator = GetTranslatorHLSLFromHandle(handle);
    ASSERT(translator);

    return translator->getUniformRegisterMap();
#else
    return nullptr;
#endif  // ANGLE_ENABLE_HLSL
}

unsigned int GetReadonlyImage2DRegisterIndex(const ShHandle handle)
{
#ifdef ANGLE_ENABLE_HLSL
    TranslatorHLSL *translator = GetTranslatorHLSLFromHandle(handle);
    ASSERT(translator);

    return translator->getReadonlyImage2DRegisterIndex();
#else
    return 0;
#endif  // ANGLE_ENABLE_HLSL
}

unsigned int GetImage2DRegisterIndex(const ShHandle handle)
{
#ifdef ANGLE_ENABLE_HLSL
    TranslatorHLSL *translator = GetTranslatorHLSLFromHandle(handle);
    ASSERT(translator);

    return translator->getImage2DRegisterIndex();
#else
    return 0;
#endif  // ANGLE_ENABLE_HLSL
}

const std::set<std::string> *GetUsedImage2DFunctionNames(const ShHandle handle)
{
#ifdef ANGLE_ENABLE_HLSL
    TranslatorHLSL *translator = GetTranslatorHLSLFromHandle(handle);
    ASSERT(translator);

    return translator->getUsedImage2DFunctionNames();
#else
    return nullptr;
#endif  // ANGLE_ENABLE_HLSL
}

bool HasValidGeometryShaderInputPrimitiveType(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return compiler->getGeometryShaderInputPrimitiveType() != EptUndefined;
}

bool HasValidGeometryShaderOutputPrimitiveType(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return compiler->getGeometryShaderOutputPrimitiveType() != EptUndefined;
}

bool HasValidGeometryShaderMaxVertices(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return compiler->getGeometryShaderMaxVertices() >= 0;
}

GLenum GetGeometryShaderInputPrimitiveType(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return GetGeometryShaderPrimitiveTypeEnum(compiler->getGeometryShaderInputPrimitiveType());
}

GLenum GetGeometryShaderOutputPrimitiveType(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return GetGeometryShaderPrimitiveTypeEnum(compiler->getGeometryShaderOutputPrimitiveType());
}

int GetGeometryShaderInvocations(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    return compiler->getGeometryShaderInvocations();
}

int GetGeometryShaderMaxVertices(const ShHandle handle)
{
    ASSERT(handle);

    TShHandleBase *base = static_cast<TShHandleBase *>(handle);
    TCompiler *compiler = base->getAsCompiler();
    ASSERT(compiler);

    int maxVertices = compiler->getGeometryShaderMaxVertices();
    ASSERT(maxVertices >= 0);
    return maxVertices;
}

}  // namespace sh
kc3-lang/angle/src/compiler/translator/ShaderLang.cpp

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kc3-lang/angle /src/compiler/translator/ShaderLang.cpp
