f4b2ba2c27
[PURPOSE]:
The current process design for Uniform / Block / Pipe IO symbols reflection (during program linking) is as following :
1.1 using a global mapper called 'TNameToIndex' to store all the relationship of name (of symbols) to their indexes (in their own MapIndexToReflection vectors).
1.2 TNameToIndex mapper will be used during program linking and helps to check and merge duplicate symbols within each stage ( Uniform, Block and Pipe IO)
1.3 Different types of symbols will have their own index mapping storage. All those symbols will share TNameToIndex as a general searching mapper.
1.4 Only IN in first stage and OUT in last stage will be dealed within traversing functions.
Now, here we meet those problems:
2.1 In and Out variables for pipelines are mapping to different MapIndexToReflection vector (ioItems), but they may still have same names within the general symbol search mapper : TNameToIndex.
2.2 Then, when there are same symbols of IN in VS and OUT in FS, TNameToIndex could not tell the difference because it only stores one local index for one symbol (1:1) as a pair of KeyValue.
[What fixed]:
Seperate I/O from other symbols like Uniform and Block (it is wrong to keep them all in TNameToIndex), and save in new searching mappers called pipeInNameToIndex and pipeOutNameToIndex.
Expose new top-level functions defined as getReflectionPipeIOIndex and getPipeIOIndex for users who need to query Pipe I/O information (As they may reach those things through getUniformIndex and getReflectionIndex now, which is a confused way.)
As there are 2 mappers for above symbols, users needs to input second argument when they wanna reach those pipe I/O parameters, that's also why we need to modify GET functions either.
[Test Case]:
The shader is as following:
######### VS ############
layout(location = 0) in vec4 g_position;
layout(location = 1) in vec4 g_color;
out StageData {
vec4 color;
} g_vs_out;
void main() {
gl_Position = g_position;
g_vs_out.color = g_color;
}
########### FS #############
in StageData {
vec4 color;
} g_fs_in;
layout(location = 0) out vec4 g_color;
void main() {
g_color = g_fs_in.color;
}
223 lines
No EOL
8 KiB
C++
223 lines
No EOL
8 KiB
C++
//
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// Copyright (C) 2013-2016 LunarG, Inc.
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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//
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// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef GLSLANG_WEB
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#ifndef _REFLECTION_INCLUDED
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#define _REFLECTION_INCLUDED
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#include "../Public/ShaderLang.h"
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#include "../Include/Types.h"
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#include <list>
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#include <set>
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//
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// A reflection database and its interface, consistent with the OpenGL API reflection queries.
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//
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namespace glslang {
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class TIntermediate;
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class TIntermAggregate;
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class TReflectionTraverser;
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// The full reflection database
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class TReflection {
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public:
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TReflection(EShReflectionOptions opts, EShLanguage first, EShLanguage last)
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: options(opts), firstStage(first), lastStage(last), badReflection(TObjectReflection::badReflection())
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{
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for (int dim=0; dim<3; ++dim)
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localSize[dim] = 0;
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}
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virtual ~TReflection() {}
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// grow the reflection stage by stage
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bool addStage(EShLanguage, const TIntermediate&);
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// for mapping a uniform index to a uniform object's description
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int getNumUniforms() { return (int)indexToUniform.size(); }
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const TObjectReflection& getUniform(int i) const
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{
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if (i >= 0 && i < (int)indexToUniform.size())
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return indexToUniform[i];
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else
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return badReflection;
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}
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// for mapping a block index to the block's description
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int getNumUniformBlocks() const { return (int)indexToUniformBlock.size(); }
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const TObjectReflection& getUniformBlock(int i) const
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{
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if (i >= 0 && i < (int)indexToUniformBlock.size())
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return indexToUniformBlock[i];
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else
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return badReflection;
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}
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// for mapping an pipeline input index to the input's description
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int getNumPipeInputs() { return (int)indexToPipeInput.size(); }
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const TObjectReflection& getPipeInput(int i) const
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{
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if (i >= 0 && i < (int)indexToPipeInput.size())
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return indexToPipeInput[i];
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else
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return badReflection;
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}
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// for mapping an pipeline output index to the output's description
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int getNumPipeOutputs() { return (int)indexToPipeOutput.size(); }
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const TObjectReflection& getPipeOutput(int i) const
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{
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if (i >= 0 && i < (int)indexToPipeOutput.size())
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return indexToPipeOutput[i];
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else
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return badReflection;
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}
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// for mapping from an atomic counter to the uniform index
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int getNumAtomicCounters() const { return (int)atomicCounterUniformIndices.size(); }
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const TObjectReflection& getAtomicCounter(int i) const
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{
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if (i >= 0 && i < (int)atomicCounterUniformIndices.size())
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return getUniform(atomicCounterUniformIndices[i]);
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else
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return badReflection;
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}
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// for mapping a buffer variable index to a buffer variable object's description
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int getNumBufferVariables() { return (int)indexToBufferVariable.size(); }
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const TObjectReflection& getBufferVariable(int i) const
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{
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if (i >= 0 && i < (int)indexToBufferVariable.size())
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return indexToBufferVariable[i];
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else
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return badReflection;
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}
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// for mapping a storage block index to the storage block's description
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int getNumStorageBuffers() const { return (int)indexToBufferBlock.size(); }
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const TObjectReflection& getStorageBufferBlock(int i) const
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{
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if (i >= 0 && i < (int)indexToBufferBlock.size())
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return indexToBufferBlock[i];
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else
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return badReflection;
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}
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// for mapping any name to its index (block names, uniform names and input/output names)
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int getIndex(const char* name) const
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{
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TNameToIndex::const_iterator it = nameToIndex.find(name);
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if (it == nameToIndex.end())
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return -1;
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else
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return it->second;
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}
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// see getIndex(const char*)
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int getIndex(const TString& name) const { return getIndex(name.c_str()); }
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// for mapping any name to its index (only pipe input/output names)
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int getPipeIOIndex(const char* name, const bool inOrOut) const
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{
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TNameToIndex::const_iterator it = inOrOut ? pipeInNameToIndex.find(name) : pipeOutNameToIndex.find(name);
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if (it == (inOrOut ? pipeInNameToIndex.end() : pipeOutNameToIndex.end()))
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return -1;
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else
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return it->second;
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}
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// see gePipeIOIndex(const char*, const bool)
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int getPipeIOIndex(const TString& name, const bool inOrOut) const { return getPipeIOIndex(name.c_str(), inOrOut); }
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// Thread local size
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unsigned getLocalSize(int dim) const { return dim <= 2 ? localSize[dim] : 0; }
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void dump();
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protected:
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friend class glslang::TReflectionTraverser;
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void buildCounterIndices(const TIntermediate&);
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void buildUniformStageMask(const TIntermediate& intermediate);
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void buildAttributeReflection(EShLanguage, const TIntermediate&);
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// Need a TString hash: typedef std::unordered_map<TString, int> TNameToIndex;
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typedef std::map<std::string, int> TNameToIndex;
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typedef std::vector<TObjectReflection> TMapIndexToReflection;
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typedef std::vector<int> TIndices;
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TMapIndexToReflection& GetBlockMapForStorage(TStorageQualifier storage)
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{
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if ((options & EShReflectionSeparateBuffers) && storage == EvqBuffer)
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return indexToBufferBlock;
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return indexToUniformBlock;
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}
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TMapIndexToReflection& GetVariableMapForStorage(TStorageQualifier storage)
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{
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if ((options & EShReflectionSeparateBuffers) && storage == EvqBuffer)
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return indexToBufferVariable;
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return indexToUniform;
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}
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EShReflectionOptions options;
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EShLanguage firstStage;
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EShLanguage lastStage;
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TObjectReflection badReflection; // return for queries of -1 or generally out of range; has expected descriptions with in it for this
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TNameToIndex nameToIndex; // maps names to indexes; can hold all types of data: uniform/buffer and which function names have been processed
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TNameToIndex pipeInNameToIndex; // maps pipe in names to indexes, this is a fix to seperate pipe I/O from uniforms and buffers.
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TNameToIndex pipeOutNameToIndex; // maps pipe out names to indexes, this is a fix to seperate pipe I/O from uniforms and buffers.
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TMapIndexToReflection indexToUniform;
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TMapIndexToReflection indexToUniformBlock;
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TMapIndexToReflection indexToBufferVariable;
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TMapIndexToReflection indexToBufferBlock;
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TMapIndexToReflection indexToPipeInput;
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TMapIndexToReflection indexToPipeOutput;
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TIndices atomicCounterUniformIndices;
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unsigned int localSize[3];
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};
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} // end namespace glslang
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#endif // _REFLECTION_INCLUDED
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#endif // GLSLANG_WEB
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