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/**
* @file llimagefilter.cpp
* @brief Simple Image Filtering.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2014, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llimagefilter.h"
#include "llmath.h"
#include "v3color.h"
#include "v4coloru.h"
#include "m3math.h"
#include "v3math.h"
#include "llsdserialize.h"
//---------------------------------------------------------------------------
// LLImageFilter
//---------------------------------------------------------------------------
LLImageFilter::LLImageFilter() :
mFilterData(LLSD::emptyArray())
{
}
LLImageFilter::~LLImageFilter()
{
}
/*
" -f, --filter <name> [<param>]\n"
" Apply the filter <name> to the input images using the optional <param> value. Admissible names:\n"
" - 'grayscale' converts to grayscale (no param).\n"
" - 'sepia' converts to sepia (no param).\n"
" - 'saturate' changes color saturation according to <param>: < 1.0 will desaturate, > 1.0 will saturate.\n"
" - 'rotate' rotates the color hue according to <param> (in degree, positive value only).\n"
" - 'gamma' applies gamma curve <param> to all channels: > 1.0 will darken, < 1.0 will lighten.\n"
" - 'colorize' applies a red tint to the image using <param> as an alpha (transparency between 0.0 and 1.0) value.\n"
" - 'contrast' modifies the contrast according to <param> : > 1.0 will enhance the contrast, <1.0 will flatten it.\n"
" - 'brighten' adds <param> light to the image (<param> between 0 and 255).\n"
" - 'darken' substracts <param> light to the image (<param> between 0 and 255).\n"
" - 'linearize' optimizes the contrast using the brightness histogram. <param> is the fraction (between 0.0 and 1.0) of discarded tail of the histogram.\n"
" - 'posterize' redistributes the colors between <param> classes per channel (<param> between 2 and 255).\n"
" - 'newsscreen' applies a 2D sine screening to the red channel and output to black and white.\n"
" - 'horizontalscreen' applies a horizontal screening to the red channel and output to black and white.\n"
" - 'verticalscreen' applies a vertical screening to the red channel and output to black and white.\n"
" - 'slantedscreen' applies a 45 degrees slanted screening to the red channel and output to black and white.\n"
" - Any other value will be interpreted as a file name describing a sequence of filters and parameters to be applied to the input images.\n"
" -v, --vignette <name> [<feather> <min>]\n"
" Apply a circular central vignette <name> to the filter using the optional <feather> and <min> values. Admissible names:\n"
" - 'blend' : the filter is applied with full intensity in the center and blends with the image to the periphery.\n"
" - 'fade' : the filter is applied with full intensity in the center and fades to black to the periphery.\n"
// Set the vignette if any
if (vignette_name == "blend")
{
raw_image->setVignette(VIGNETTE_MODE_BLEND,VIGNETTE_TYPE_CENTER,(float)(vignette_param_1),(float)(vignette_param_2));
}
else if (vignette_name == "fade")
{
raw_image->setVignette(VIGNETTE_MODE_FADE,VIGNETTE_TYPE_CENTER,(float)(vignette_param_1),(float)(vignette_param_2));
}
// Apply filter if any
if (filter_name == "sepia")
{
raw_image->filterSepia();
}
else if (filter_name == "grayscale")
{
raw_image->filterGrayScale();
}
else if (filter_name == "saturate")
{
raw_image->filterSaturate((float)(filter_param));
}
else if (filter_name == "rotate")
{
raw_image->filterRotate((float)(filter_param));
}
else if (filter_name == "gamma")
{
raw_image->filterGamma((float)(filter_param),LLColor3::white);
}
else if (filter_name == "colorize")
{
// For testing, we just colorize in the red channel, modulate by the alpha passed as a parameter
LLColor3 color(1.0,0.0,0.0);
LLColor3 alpha((F32)(filter_param),0.0,0.0);
raw_image->filterColorize(color,alpha);
}
else if (filter_name == "contrast")
{
raw_image->filterContrast((float)(filter_param),LLColor3::white);
}
else if (filter_name == "brighten")
{
raw_image->filterBrightness((S32)(filter_param),LLColor3::white);
}
else if (filter_name == "darken")
{
raw_image->filterBrightness((S32)(-filter_param),LLColor3::white);
}
else if (filter_name == "linearize")
{
raw_image->filterLinearize((float)(filter_param),LLColor3::white);
}
else if (filter_name == "posterize")
{
raw_image->filterEqualize((S32)(filter_param),LLColor3::white);
}
else if (filter_name == "newsscreen")
{
raw_image->filterScreen(SCREEN_MODE_2DSINE,(S32)(filter_param),0.0);
}
else if (filter_name == "horizontalscreen")
{
raw_image->filterScreen(SCREEN_MODE_LINE,(S32)(filter_param),0.0);
}
else if (filter_name == "verticalscreen")
{
raw_image->filterScreen(SCREEN_MODE_LINE,(S32)(filter_param),90.0);
}
else if (filter_name == "slantedscreen")
{
raw_image->filterScreen(SCREEN_MODE_LINE,(S32)(filter_param),45.0);
}
*/
// Load filter from file
void LLImageFilter::loadFromFile(const std::string& file_path)
{
//std::cout << "Loading filter settings from : " << file_path << std::endl;
llifstream filter_xml(file_path);
if (filter_xml.is_open())
{
// Load and parse the file
LLPointer<LLSDParser> parser = new LLSDXMLParser();
parser->parse(filter_xml, mFilterData, LLSDSerialize::SIZE_UNLIMITED);
filter_xml.close();
}
else
{
// File couldn't be open, reset the filter data
mFilterData = LLSD();
}
}
// Apply the filter data to the image passed as parameter
void LLImageFilter::executeFilter(LLPointer<LLImageRaw> raw_image)
{
//std::cout << "Filter : size = " << mFilterData.size() << std::endl;
for (S32 i = 0; i < mFilterData.size(); ++i)
{
std::string filter_name = mFilterData[i][0].asString();
// Dump out the filter values (for debug)
//std::cout << "Filter : name = " << mFilterData[i][0].asString() << ", params = ";
//for (S32 j = 1; j < mFilterData[i].size(); ++j)
//{
// std::cout << mFilterData[i][j].asString() << ", ";
//}
//std::cout << std::endl;
// Execute the filter described on this line
if (filter_name == "blend")
{
raw_image->setVignette(VIGNETTE_MODE_BLEND,VIGNETTE_TYPE_CENTER,(float)(mFilterData[i][1].asReal()),(float)(mFilterData[i][2].asReal()));
}
else if (filter_name == "fade")
{
raw_image->setVignette(VIGNETTE_MODE_FADE,VIGNETTE_TYPE_CENTER,(float)(mFilterData[i][1].asReal()),(float)(mFilterData[i][2].asReal()));
}
else if (filter_name == "lines")
{
raw_image->setVignette(VIGNETTE_MODE_BLEND,VIGNETTE_TYPE_LINES,(float)(mFilterData[i][1].asReal()),(float)(mFilterData[i][2].asReal()));
}
else if (filter_name == "sepia")
{
raw_image->filterSepia();
}
else if (filter_name == "grayscale")
{
raw_image->filterGrayScale();
}
else if (filter_name == "saturate")
{
raw_image->filterSaturate((float)(mFilterData[i][1].asReal()));
}
else if (filter_name == "rotate")
{
raw_image->filterRotate((float)(mFilterData[i][1].asReal()));
}
else if (filter_name == "gamma")
{
LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal()));
raw_image->filterGamma((float)(mFilterData[i][1].asReal()),color);
}
else if (filter_name == "colorize")
{
LLColor3 color((float)(mFilterData[i][1].asReal()),(float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()));
LLColor3 alpha((F32)(mFilterData[i][4].asReal()),(float)(mFilterData[i][5].asReal()),(float)(mFilterData[i][6].asReal()));
raw_image->filterColorize(color,alpha);
}
else if (filter_name == "contrast")
{
LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal()));
raw_image->filterContrast((float)(mFilterData[i][1].asReal()),color);
}
else if (filter_name == "brighten")
{
LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal()));
raw_image->filterBrightness((S32)(mFilterData[i][1].asReal()),color);
}
else if (filter_name == "darken")
{
LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal()));
raw_image->filterBrightness((S32)(-mFilterData[i][1].asReal()),color);
}
else if (filter_name == "linearize")
{
LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal()));
raw_image->filterLinearize((float)(mFilterData[i][1].asReal()),color);
}
else if (filter_name == "posterize")
{
LLColor3 color((float)(mFilterData[i][2].asReal()),(float)(mFilterData[i][3].asReal()),(float)(mFilterData[i][4].asReal()));
raw_image->filterEqualize((S32)(mFilterData[i][1].asReal()),color);
}
else if (filter_name == "screen")
{
std::string screen_name = mFilterData[i][1].asString();
EScreenMode mode = SCREEN_MODE_2DSINE;
if (screen_name == "2Dsine")
{
mode = SCREEN_MODE_2DSINE;
}
else if (screen_name == "line")
{
mode = SCREEN_MODE_LINE;
}
raw_image->filterScreen(mode,(S32)(mFilterData[i][2].asReal()),(F32)(mFilterData[i][3].asReal()));
}
}
}
//============================================================================
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