1 files changed, 432 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/Shader.cpp b/gfx/angle/src/libANGLE/Shader.cpp
new file mode 100755
index 000000000..a4c68950b
--- /dev/null
+++ b/gfx/angle/src/libANGLE/Shader.cpp
@@ -0,0 +1,432 @@
+//
+// Copyright (c) 2002-2014 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.
+//
+
+// Shader.cpp: Implements the gl::Shader class and its  derived classes
+// VertexShader and FragmentShader. Implements GL shader objects and related
+// functionality. [OpenGL ES 2.0.24] section 2.10 page 24 and section 3.8 page 84.
+
+#include "libANGLE/Shader.h"
+
+#include <sstream>
+
+#include "common/utilities.h"
+#include "GLSLANG/ShaderLang.h"
+#include "libANGLE/Caps.h"
+#include "libANGLE/Compiler.h"
+#include "libANGLE/Constants.h"
+#include "libANGLE/renderer/GLImplFactory.h"
+#include "libANGLE/renderer/ShaderImpl.h"
+#include "libANGLE/ResourceManager.h"
+#include "libANGLE/Context.h"
+
+namespace gl
+{
+
+namespace
+{
+template <typename VarT>
+std::vector<VarT> GetActiveShaderVariables(const std::vector<VarT> *variableList)
+{
+    ASSERT(variableList);
+    std::vector<VarT> result;
+    for (size_t varIndex = 0; varIndex < variableList->size(); varIndex++)
+    {
+        const VarT &var = variableList->at(varIndex);
+        if (var.staticUse)
+        {
+            result.push_back(var);
+        }
+    }
+    return result;
+}
+
+template <typename VarT>
+const std::vector<VarT> &GetShaderVariables(const std::vector<VarT> *variableList)
+{
+    ASSERT(variableList);
+    return *variableList;
+}
+
+}  // anonymous namespace
+
+// true if varying x has a higher priority in packing than y
+bool CompareShaderVar(const sh::ShaderVariable &x, const sh::ShaderVariable &y)
+{
+    if (x.type == y.type)
+    {
+        return x.arraySize > y.arraySize;
+    }
+
+    // Special case for handling structs: we sort these to the end of the list
+    if (x.type == GL_STRUCT_ANGLEX)
+    {
+        return false;
+    }
+
+    if (y.type == GL_STRUCT_ANGLEX)
+    {
+        return true;
+    }
+
+    return gl::VariableSortOrder(x.type) < gl::VariableSortOrder(y.type);
+}
+
+ShaderState::ShaderState(GLenum shaderType) : mLabel(), mShaderType(shaderType), mShaderVersion(100)
+{
+    mLocalSize.fill(-1);
+}
+
+ShaderState::~ShaderState()
+{
+}
+
+Shader::Shader(ResourceManager *manager,
+               rx::GLImplFactory *implFactory,
+               const gl::Limitations &rendererLimitations,
+               GLenum type,
+               GLuint handle)
+    : mState(type),
+      mImplementation(implFactory->createShader(mState)),
+      mRendererLimitations(rendererLimitations),
+      mHandle(handle),
+      mType(type),
+      mRefCount(0),
+      mDeleteStatus(false),
+      mCompiled(false),
+      mResourceManager(manager)
+{
+    ASSERT(mImplementation);
+}
+
+Shader::~Shader()
+{
+    SafeDelete(mImplementation);
+}
+
+void Shader::setLabel(const std::string &label)
+{
+    mState.mLabel = label;
+}
+
+const std::string &Shader::getLabel() const
+{
+    return mState.mLabel;
+}
+
+GLuint Shader::getHandle() const
+{
+    return mHandle;
+}
+
+void Shader::setSource(GLsizei count, const char *const *string, const GLint *length)
+{
+    std::ostringstream stream;
+
+    for (int i = 0; i < count; i++)
+    {
+        if (length == nullptr || length[i] < 0)
+        {
+            stream.write(string[i], strlen(string[i]));
+        }
+        else
+        {
+            stream.write(string[i], length[i]);
+        }
+    }
+
+    mState.mSource = stream.str();
+}
+
+int Shader::getInfoLogLength() const
+{
+    if (mInfoLog.empty())
+    {
+        return 0;
+    }
+
+    return (static_cast<int>(mInfoLog.length()) + 1);
+}
+
+void Shader::getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog) const
+{
+    int index = 0;
+
+    if (bufSize > 0)
+    {
+        index = std::min(bufSize - 1, static_cast<GLsizei>(mInfoLog.length()));
+        memcpy(infoLog, mInfoLog.c_str(), index);
+
+        infoLog[index] = '\0';
+    }
+
+    if (length)
+    {
+        *length = index;
+    }
+}
+
+int Shader::getSourceLength() const
+{
+    return mState.mSource.empty() ? 0 : (static_cast<int>(mState.mSource.length()) + 1);
+}
+
+int Shader::getTranslatedSourceLength() const
+{
+    if (mState.mTranslatedSource.empty())
+    {
+        return 0;
+    }
+
+    return (static_cast<int>(mState.mTranslatedSource.length()) + 1);
+}
+
+int Shader::getTranslatedSourceWithDebugInfoLength() const
+{
+    const std::string &debugInfo = mImplementation->getDebugInfo();
+    if (debugInfo.empty())
+    {
+        return 0;
+    }
+
+    return (static_cast<int>(debugInfo.length()) + 1);
+}
+
+void Shader::getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer)
+{
+    int index = 0;
+
+    if (bufSize > 0)
+    {
+        index = std::min(bufSize - 1, static_cast<GLsizei>(source.length()));
+        memcpy(buffer, source.c_str(), index);
+
+        buffer[index] = '\0';
+    }
+
+    if (length)
+    {
+        *length = index;
+    }
+}
+
+void Shader::getSource(GLsizei bufSize, GLsizei *length, char *buffer) const
+{
+    getSourceImpl(mState.mSource, bufSize, length, buffer);
+}
+
+void Shader::getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer) const
+{
+    getSourceImpl(mState.mTranslatedSource, bufSize, length, buffer);
+}
+
+void Shader::getTranslatedSourceWithDebugInfo(GLsizei bufSize, GLsizei *length, char *buffer) const
+{
+    const std::string &debugInfo = mImplementation->getDebugInfo();
+    getSourceImpl(debugInfo, bufSize, length, buffer);
+}
+
+void Shader::compile(const Context *context)
+{
+    mState.mTranslatedSource.clear();
+    mInfoLog.clear();
+    mState.mShaderVersion = 100;
+    mState.mVaryings.clear();
+    mState.mUniforms.clear();
+    mState.mInterfaceBlocks.clear();
+    mState.mActiveAttributes.clear();
+    mState.mActiveOutputVariables.clear();
+
+    Compiler *compiler = context->getCompiler();
+    ShHandle compilerHandle = compiler->getCompilerHandle(mState.mShaderType);
+
+    std::stringstream sourceStream;
+
+    std::string sourcePath;
+    ShCompileOptions additionalOptions =
+        mImplementation->prepareSourceAndReturnOptions(&sourceStream, &sourcePath);
+    ShCompileOptions compileOptions = (SH_OBJECT_CODE | SH_VARIABLES | additionalOptions);
+
+    // Add default options to WebGL shaders to prevent unexpected behavior during compilation.
+    if (context->getExtensions().webglCompatibility)
+    {
+        compileOptions |= SH_LIMIT_CALL_STACK_DEPTH;
+        compileOptions |= SH_LIMIT_EXPRESSION_COMPLEXITY;
+        compileOptions |= SH_ENFORCE_PACKING_RESTRICTIONS;
+    }
+
+    // Some targets (eg D3D11 Feature Level 9_3 and below) do not support non-constant loop indexes
+    // in fragment shaders. Shader compilation will fail. To provide a better error message we can
+    // instruct the compiler to pre-validate.
+    if (mRendererLimitations.shadersRequireIndexedLoopValidation)
+    {
+        compileOptions |= SH_VALIDATE_LOOP_INDEXING;
+    }
+
+    std::string sourceString  = sourceStream.str();
+    std::vector<const char *> sourceCStrings;
+
+    if (!sourcePath.empty())
+    {
+        sourceCStrings.push_back(sourcePath.c_str());
+    }
+
+    sourceCStrings.push_back(sourceString.c_str());
+
+    bool result =
+        sh::Compile(compilerHandle, &sourceCStrings[0], sourceCStrings.size(), compileOptions);
+
+    if (!result)
+    {
+        mInfoLog = sh::GetInfoLog(compilerHandle);
+        TRACE("\n%s", mInfoLog.c_str());
+        mCompiled = false;
+        return;
+    }
+
+    mState.mTranslatedSource = sh::GetObjectCode(compilerHandle);
+
+#ifndef NDEBUG
+    // Prefix translated shader with commented out un-translated shader.
+    // Useful in diagnostics tools which capture the shader source.
+    std::ostringstream shaderStream;
+    shaderStream << "// GLSL\n";
+    shaderStream << "//\n";
+
+    size_t curPos = 0;
+    while (curPos != std::string::npos)
+    {
+        size_t nextLine = mState.mSource.find("\n", curPos);
+        size_t len      = (nextLine == std::string::npos) ? std::string::npos : (nextLine - curPos + 1);
+
+        shaderStream << "// " << mState.mSource.substr(curPos, len);
+
+        curPos = (nextLine == std::string::npos) ? std::string::npos : (nextLine + 1);
+    }
+    shaderStream << "\n\n";
+    shaderStream << mState.mTranslatedSource;
+    mState.mTranslatedSource = shaderStream.str();
+#endif
+
+    // Gather the shader information
+    mState.mShaderVersion = sh::GetShaderVersion(compilerHandle);
+
+    mState.mVaryings        = GetShaderVariables(sh::GetVaryings(compilerHandle));
+    mState.mUniforms        = GetShaderVariables(sh::GetUniforms(compilerHandle));
+    mState.mInterfaceBlocks = GetShaderVariables(sh::GetInterfaceBlocks(compilerHandle));
+
+    switch (mState.mShaderType)
+    {
+        case GL_COMPUTE_SHADER:
+        {
+            mState.mLocalSize = sh::GetComputeShaderLocalGroupSize(compilerHandle);
+            break;
+        }
+        case GL_VERTEX_SHADER:
+        {
+            mState.mActiveAttributes = GetActiveShaderVariables(sh::GetAttributes(compilerHandle));
+            break;
+        }
+        case GL_FRAGMENT_SHADER:
+        {
+            // TODO(jmadill): Figure out why we only sort in the FS, and if we need to.
+            std::sort(mState.mVaryings.begin(), mState.mVaryings.end(), CompareShaderVar);
+            mState.mActiveOutputVariables =
+                GetActiveShaderVariables(sh::GetOutputVariables(compilerHandle));
+            break;
+        }
+        default:
+            UNREACHABLE();
+    }
+
+    ASSERT(!mState.mTranslatedSource.empty());
+
+    mCompiled = mImplementation->postTranslateCompile(compiler, &mInfoLog);
+}
+
+void Shader::addRef()
+{
+    mRefCount++;
+}
+
+void Shader::release()
+{
+    mRefCount--;
+
+    if (mRefCount == 0 && mDeleteStatus)
+    {
+        mResourceManager->deleteShader(mHandle);
+    }
+}
+
+unsigned int Shader::getRefCount() const
+{
+    return mRefCount;
+}
+
+bool Shader::isFlaggedForDeletion() const
+{
+    return mDeleteStatus;
+}
+
+void Shader::flagForDeletion()
+{
+    mDeleteStatus = true;
+}
+
+int Shader::getShaderVersion() const
+{
+    return mState.mShaderVersion;
+}
+
+const std::vector<sh::Varying> &Shader::getVaryings() const
+{
+    return mState.getVaryings();
+}
+
+const std::vector<sh::Uniform> &Shader::getUniforms() const
+{
+    return mState.getUniforms();
+}
+
+const std::vector<sh::InterfaceBlock> &Shader::getInterfaceBlocks() const
+{
+    return mState.getInterfaceBlocks();
+}
+
+const std::vector<sh::Attribute> &Shader::getActiveAttributes() const
+{
+    return mState.getActiveAttributes();
+}
+
+const std::vector<sh::OutputVariable> &Shader::getActiveOutputVariables() const
+{
+    return mState.getActiveOutputVariables();
+}
+
+int Shader::getSemanticIndex(const std::string &attributeName) const
+{
+    if (!attributeName.empty())
+    {
+        const auto &activeAttributes = mState.getActiveAttributes();
+
+        int semanticIndex = 0;
+        for (size_t attributeIndex = 0; attributeIndex < activeAttributes.size(); attributeIndex++)
+        {
+            const sh::ShaderVariable &attribute = activeAttributes[attributeIndex];
+
+            if (attribute.name == attributeName)
+            {
+                return semanticIndex;
+            }
+
+            semanticIndex += gl::VariableRegisterCount(attribute.type);
+        }
+    }
+
+    return -1;
+}
+
+}