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/*
* Copyright 2010 Inalogic Inc.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License version 3 along with this program. If not, see
* <http://www.gnu.org/licenses/>
*
* Authored by: Jay Taoko <jaytaoko@inalogic.com>
*
*/
#include "NuxCore/NuxCore.h"
#include "GLResource.h"
#include "GLShader.h"
#include "GLShaderParameter.h"
namespace nux
{
// //-----------------------------------------------------------------------------
// void AddShaderDefinition(std::vector<ShaderDefinition>& Definitions,const TCHAR* Name,const TCHAR* Format,...)
// {
// TCHAR DefinitionText[1024];
// GET_VARARGS(DefinitionText, NUX_ARRAY_COUNT(DefinitionText), NUX_ARRAY_COUNT(DefinitionText)-1,Format);
//
// ShaderDefinition Definition;
// Definition.Name = Name;
// Definition.Value = DefinitionText;
// Definitions.push_back(Definition);
// }
//
// //-----------------------------------------------------------------------------
// bool ExtractShaderString3(const NString &ShaderToken, const NString &ShaderSource, NString &RetSource, NString& ShaderPreprocessorDefines)
// {
// unsigned int lineStart = 0;
// unsigned int lineCount = 1;
// bool startTokenFound = false;
// int shaderStringStart =0;
// int shaderStartLine =1;
//
//
// //Loop for all characters in the string
// if(ShaderToken != TEXT(""))
// {
// int i;
// for(i = 0; i< ShaderSource.Length(); i++)
// {
// //Check if the starting character '[' (open bracket) is found at the beginning of the line
// // i counts the characters in the file. lineStart is equal to i at the beginning of the line.
// if((TCharStringNCompare(&ShaderSource[i],TEXT("["), 1) == 0) && (lineStart == i))
// {
// if(!startTokenFound)
// {
// //Test for the start token
// if(ShaderSource.FindFirstOccurence(ShaderToken) == i)
// {
// // Found the shader token
// shaderStringStart = i + ShaderToken.Length();
// startTokenFound = true;
//
// //Set what line the shader was found on
// shaderStartLine = lineCount;
// }
// }
// else
// {
// //Break where the end token was found
// break;
// }
// }
//
// //If the character is equal to the new line character,
// // The next character must be on the new line
// if((TCharStringNCompare(&ShaderSource[i], TEXT("\r"), 1) == 0) || (TCharStringNCompare(&ShaderSource[i], TEXT("\n"), 1) == 0))
// {
// lineStart = i+1;
// }
//
// //Count the new lines
// if(TCharStringNCompare(&ShaderSource[i], TEXT("\n"), 1) == 0)
// {
// lineCount++;
// }
// }
//
// //If the string was not found, return false
// if(!startTokenFound || shaderStringStart >= i)
// {
// return false;
// }
//
// //Assign the return string
// RetSource = ShaderSource.GetSubString(shaderStringStart, i - shaderStringStart);
//
// //Add the line directive to the shader source. See the documentation for GLSL #line directive.
// // GLSL spec: The #version directive must occur in a shader before anything else, except for comments and white space.
// int Pos = RetSource.FindFirstOccurence(TEXT("#version"));
// while(RetSource[Pos] != TEXT('\n'))
// {
// if(RetSource[Pos] == 0)
// break;
// ++Pos;
// }
// if(RetSource[Pos] != 0)
// ++Pos;
//
// int EndOfLinePosition = 0;
// unsigned int LinePosition = 0;
// while((EndOfLinePosition = RetSource.FindNextOccurence(TEXT('\n'), EndOfLinePosition)) < Pos-1)
// {
// ++EndOfLinePosition;
// ++LinePosition;
// }
//
// RetSource.Insert(Pos, NString::Printf(TEXT("#line %u\n"), LinePosition + shaderStartLine));
//
// // Insert the preprocessor definitions before the #line directive
// if(ShaderPreprocessorDefines.Length())
// RetSource.Insert(Pos, ShaderPreprocessorDefines + NString(TEXT('\n')));
//
// return true;
// }
// else
// {
// // We are not searching for a start token. Return the whole source.
// RetSource = ShaderSource;
// return true;
// }
// }
//
// void InsertPreProcessorDefinitions(const NString &ShaderSource, NString &RetSource, NString& ShaderPreprocessorDefines)
// {
// RetSource = ShaderSource;
//
// if(ShaderPreprocessorDefines.Length() == 0)
// return;
//
// // GLSL spec: The #version directive must occur in a shader before anything else, except for comments and white space.
// int Pos = RetSource.FindFirstOccurence(TEXT("#version"));
// if(Pos != -1)
// {
// Pos = RetSource.FindNextOccurence(TEXT('\n'), Pos);
// if(Pos == -1)
// {
// // this is most likely an incorrect shader
// Pos = RetSource.Size();
// RetSource.Insert(Pos, NString(TEXT('\n')));
// Pos = RetSource.Size();
// }
// else
// {
// // Skip character \n
// Pos++;
// }
// }
// else
// {
// Pos = 0;
// }
//
// if(ShaderPreprocessorDefines.Length())
// RetSource.Insert(Pos, ShaderPreprocessorDefines + NString(TEXT('\n')));
// }
}
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