FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
89fd422c98
OpenSceneGraph/include/osg/ImageUtils
Robert Osfield 70b5297575 From Jannik Heller, typo fixes 
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14826 16af8721-9629-0410-8352-f15c8da7e697
2015-04-07 18:01:12 +00:00

249 lines
14 KiB
C++
Raw Blame History

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_IMAGEUTILS
#define OSG_IMAGEUTILS 1
#include <osg/Export>
#include <osg/Image>
#include <osg/Vec3i>
namespace osg {
template <typename T, class O>
void _readRow(unsigned int num, GLenum pixelFormat, const T* data, O& operation)
{
switch(pixelFormat)
{
case(GL_INTENSITY): { for(unsigned int i=0;i<num;++i) { T v=*data++; operation.rgba( operation.cast(v),operation.cast(v),operation.cast(v),operation.cast(v)); } } break;
case(GL_LUMINANCE): { for(unsigned int i=0;i<num;++i) { operation.luminance(operation.cast(*data++)); } } break;
case(GL_ALPHA): { for(unsigned int i=0;i<num;++i) { operation.alpha(operation.cast(*data++)); } } break;
case(GL_LUMINANCE_ALPHA): { for(unsigned int i=0;i<num;++i) { T l=*data++; T a = *data++; operation.luminance_alpha(operation.cast(l),operation.cast(a)); } } break;
case(GL_RGB): { for(unsigned int i=0;i<num;++i) { T r=*data++; T g=*data++; T b=*data++; operation.rgb(operation.cast(r),operation.cast(g),operation.cast(b)); } } break;
case(GL_RGBA): { for(unsigned int i=0;i<num;++i) { T r=*data++; T g=*data++; T b=*data++; T a=*data++; operation.rgba(operation.cast(r),operation.cast(g),operation.cast(b),operation.cast(a)); } } break;
case(GL_BGR): { for(unsigned int i=0;i<num;++i) { T b=*data++; T g=*data++; T r=*data++; operation.rgb(operation.cast(r),operation.cast(g),operation.cast(b)); } } break;
case(GL_BGRA): { for(unsigned int i=0;i<num;++i) { T b=*data++; T g=*data++; T r=*data++; T a=*data++; operation.rgba(operation.cast(r),operation.cast(g),operation.cast(b),operation.cast(a)); } } break;
}
}
template <class O>
void readRow(unsigned int num, GLenum pixelFormat, GLenum dataType, const unsigned char* data, O& operation)
{
switch(dataType)
{
case(GL_BYTE): _readRow(num, pixelFormat, (const char*)data, operation); break;
case(GL_UNSIGNED_BYTE): _readRow(num, pixelFormat, (const unsigned char*)data, operation); break;
case(GL_SHORT): _readRow(num, pixelFormat, (const short*) data, operation); break;
case(GL_UNSIGNED_SHORT): _readRow(num, pixelFormat, (const unsigned short*)data, operation); break;
case(GL_INT): _readRow(num, pixelFormat, (const int*) data, operation); break;
case(GL_UNSIGNED_INT): _readRow(num, pixelFormat, (const unsigned int*) data, operation); break;
case(GL_FLOAT): _readRow(num, pixelFormat, (const float*) data, operation); break;
case(GL_DOUBLE): _readRow(num, pixelFormat, (const double*) data, operation); break;
}
}
template <class O>
void readImage(const osg::Image* image, O& operation)
{
if (!image) return;
for(int r=0;r<image->r();++r)
{
for(int t=0;t<image->t();++t)
{
readRow(image->s(), image->getPixelFormat(), image->getDataType(), image->data(0,t,r), operation);
}
}
}
/** Convenience method for making it easy to cast all pixel channels types to a unit float RGBA form.*/
struct CastAndScaleToFloatOperation
{
float cast(char v) { return static_cast<float>(v)*(1.0f/128.0f); }
float cast(unsigned char v) { return static_cast<float>(v)*(1.0f/255.0f); }
float cast(short v) { return static_cast<float>(v)*(1.0f/32768.0f); }
float cast(unsigned short v) { return static_cast<float>(v)*(1.0f/65535.0f); }
float cast(int v) { return static_cast<float>(v)*(1.0f/2147483648.0f); }
float cast(unsigned int v) { return static_cast<float>(v)*(1.0f/4294967295.0f); }
float cast(float v) { return v; }
float cast(double v) { return static_cast<double>(v); }
};
#if 0
template <typename T, class O>
void _readRow(unsigned int num, GLenum pixelFormat, const T* data,float scale, O& operation)
{
switch(pixelFormat)
{
case(GL_LUMINANCE): { for(unsigned int i=0;i<num;++i) { float l = float(*data++)*scale; operation.luminance(l); } } break;
case(GL_ALPHA): { for(unsigned int i=0;i<num;++i) { float a = float(*data++)*scale; operation.alpha(a); } } break;
case(GL_LUMINANCE_ALPHA): { for(unsigned int i=0;i<num;++i) { float l = float(*data++)*scale; float a = float(*data++)*scale; operation.luminance_alpha(l,a); } } break;
case(GL_RGB): { for(unsigned int i=0;i<num;++i) { float r = float(*data++)*scale; float g = float(*data++)*scale; float b = float(*data++)*scale; operation.rgb(r,g,b); } } break;
case(GL_RGBA): { for(unsigned int i=0;i<num;++i) { float r = float(*data++)*scale; float g = float(*data++)*scale; float b = float(*data++)*scale; float a = float(*data++)*scale; operation.rgba(r,g,b,a); } } break;
case(GL_BGR): { for(unsigned int i=0;i<num;++i) { float b = float(*data++)*scale; float g = float(*data++)*scale; float r = float(*data++)*scale; operation.rgb(r,g,b); } } break;
case(GL_BGRA): { for(unsigned int i=0;i<num;++i) { float b = float(*data++)*scale; float g = float(*data++)*scale; float r = float(*data++)*scale; float a = float(*data++)*scale; operation.rgba(r,g,b,a); } } break;
}
}
template <class O>
void readRow(unsigned int num, GLenum pixelFormat, GLenum dataType, const unsigned char* data, O& operation)
{
switch(dataType)
{
case(GL_BYTE): _readRow(num,pixelFormat, (const char*)data, 1.0f/128.0f, operation); break;
case(GL_UNSIGNED_BYTE): _readRow(num,pixelFormat, (const unsigned char*)data, 1.0f/255.0f, operation); break;
case(GL_SHORT): _readRow(num,pixelFormat, (const short*) data, 1.0f/32768.0f, operation); break;
case(GL_UNSIGNED_SHORT): _readRow(num,pixelFormat, (const unsigned short*)data, 1.0f/65535.0f, operation); break;
case(GL_INT): _readRow(num,pixelFormat, (const int*) data, 1.0f/2147483648.0f, operation); break;
case(GL_UNSIGNED_INT): _readRow(num,pixelFormat, (const unsigned int*) data, 1.0f/4294967295.0f, operation); break;
case(GL_FLOAT): _readRow(num,pixelFormat, (const float*) data, 1.0f, operation); break;
}
}
template <class O>
void readImage(const osg::Image* image, O& operation)
{
if (!image) return;
for(int r=0;r<image->r();++r)
{
for(int t=0;t<image->t();++t)
{
readRow(image->s(), image->getPixelFormat(), image->getDataType(), image->data(0,t,r), operation);
}
}
}
#endif
// example ModifyOperator
// struct ModifyOperator
// {
// inline void luminance(float& l) const {}
// inline void alpha(float& a) const {}
// inline void luminance_alpha(float& l,float& a) const {}
// inline void rgb(float& r,float& g,float& b) const {}
// inline void rgba(float& r,float& g,float& b,float& a) const {}
// };
template <typename T, class M>
void _modifyRow(unsigned int num, GLenum pixelFormat, T* data,float scale, const M& operation)
{
float inv_scale = 1.0f/scale;
switch(pixelFormat)
{
case(GL_LUMINANCE): { for(unsigned int i=0;i<num;++i) { float l = float(*data)*scale; operation.luminance(l); *data++ = T(l*inv_scale); } } break;
case(GL_ALPHA): { for(unsigned int i=0;i<num;++i) { float a = float(*data)*scale; operation.alpha(a); *data++ = T(a*inv_scale); } } break;
case(GL_LUMINANCE_ALPHA): { for(unsigned int i=0;i<num;++i) { float l = float(*data)*scale; float a = float(*(data+1))*scale; operation.luminance_alpha(l,a); *data++ = T(l*inv_scale); *data++ = T(a*inv_scale); } } break;
case(GL_RGB): { for(unsigned int i=0;i<num;++i) { float r = float(*data)*scale; float g = float(*(data+1))*scale; float b = float(*(data+2))*scale; operation.rgb(r,g,b); *data++ = T(r*inv_scale); *data++ = T(g*inv_scale); *data++ = T(b*inv_scale); } } break;
case(GL_RGBA): { for(unsigned int i=0;i<num;++i) { float r = float(*data)*scale; float g = float(*(data+1))*scale; float b = float(*(data+2))*scale; float a = float(*(data+3))*scale; operation.rgba(r,g,b,a); *data++ = T(r*inv_scale); *data++ = T(g*inv_scale); *data++ = T(b*inv_scale); *data++ = T(a*inv_scale); } } break;
case(GL_BGR): { for(unsigned int i=0;i<num;++i) { float b = float(*data)*scale; float g = float(*(data+1))*scale; float r = float(*(data+2))*scale; operation.rgb(r,g,b); *data++ = T(b*inv_scale); *data++ = T(g*inv_scale); *data++ = T(r*inv_scale); } } break;
case(GL_BGRA): { for(unsigned int i=0;i<num;++i) { float b = float(*data)*scale; float g = float(*(data+1))*scale; float r = float(*(data+2))*scale; float a = float(*(data+3))*scale; operation.rgba(r,g,b,a); *data++ = T(b*inv_scale); *data++ = T(g*inv_scale); *data++ = T(r*inv_scale); *data++ = T(a*inv_scale); } } break;
}
}
template <class M>
void modifyRow(unsigned int num, GLenum pixelFormat, GLenum dataType, unsigned char* data, const M& operation)
{
switch(dataType)
{
case(GL_BYTE): _modifyRow(num,pixelFormat, (char*)data, 1.0f/128.0f, operation); break;
case(GL_UNSIGNED_BYTE): _modifyRow(num,pixelFormat, (unsigned char*)data, 1.0f/255.0f, operation); break;
case(GL_SHORT): _modifyRow(num,pixelFormat, (short*) data, 1.0f/32768.0f, operation); break;
case(GL_UNSIGNED_SHORT): _modifyRow(num,pixelFormat, (unsigned short*)data, 1.0f/65535.0f, operation); break;
case(GL_INT): _modifyRow(num,pixelFormat, (int*) data, 1.0f/2147483648.0f, operation); break;
case(GL_UNSIGNED_INT): _modifyRow(num,pixelFormat, (unsigned int*) data, 1.0f/4294967295.0f, operation); break;
case(GL_FLOAT): _modifyRow(num,pixelFormat, (float*) data, 1.0f, operation); break;
}
}
template <class M>
void modifyImage(osg::Image* image, const M& operation)
{
if (!image) return;
for(int r=0;r<image->r();++r)
{
for(int t=0;t<image->t();++t)
{
modifyRow(image->s(), image->getPixelFormat(), image->getDataType(), image->data(0,t,r), operation);
}
}
}
/** Compute the min max colour values in the image.*/
extern OSG_EXPORT bool computeMinMax(const osg::Image* image, osg::Vec4& min, osg::Vec4& max);
/** Compute the min max colour values in the image.*/
extern OSG_EXPORT bool offsetAndScaleImage(osg::Image* image, const osg::Vec4& offset, const osg::Vec4& scale);
/** Compute source image to destination image.*/
extern OSG_EXPORT bool copyImage(const osg::Image* srcImage, int src_s, int src_t, int src_r, int width, int height, int depth,
osg::Image* destImage, int dest_s, int dest_t, int dest_r, bool doRescale = false);
/** Compute the min max colour values in the image.*/
extern OSG_EXPORT bool clearImageToColor(osg::Image* image, const osg::Vec4& colour);
typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
/** Search through the list of Images and find the maximum number of components used amoung the images.*/
extern OSG_EXPORT unsigned int maximimNumOfComponents(const ImageList& imageList);
/** create a 3D osg::Image from a list of osg::Image.*/
extern OSG_EXPORT osg::Image* createImage3D(const ImageList& imageList,
GLenum desiredPixelFormat,
int s_maximumImageSize = 1024,
int t_maximumImageSize = 1024,
int r_maximumImageSize = 1024,
bool resizeToPowerOfTwo = false);
/** create a 3D osg::Image from a list of osg::Image.*/
extern OSG_EXPORT osg::Image* createImage3DWithAlpha(const ImageList& imageList,
int s_maximumImageSize = 1024,
int t_maximumImageSize = 1024,
int r_maximumImageSize = 1024,
bool resizeToPowerOfTwo = false);
/** create a 2D osg::Image that provides a point at the center of the image.
* The colour across th image is computed from a balance between the center color and the background color controlled by the power of the radius from the center.*/
extern OSG_EXPORT osg::Image* createSpotLightImage(const osg::Vec4& centerColour, const osg::Vec4& backgroudColour, unsigned int size, float power);
enum ColorSpaceOperation
{
NO_COLOR_SPACE_OPERATION,
MODULATE_ALPHA_BY_LUMINANCE,
MODULATE_ALPHA_BY_COLOR,
REPLACE_ALPHA_WITH_LUMINANCE,
REPLACE_RGB_WITH_LUMINANCE
};
/** Convert the RGBA values in a Image based on a ColorSpaceOperation defined scheme.*/
extern OSG_EXPORT osg::Image* colorSpaceConversion(ColorSpaceOperation op, osg::Image* image, const osg::Vec4& colour);
/** Create a copy of an osg::Image. converting the origin and orientation to standard lower left OpenGL style origin .*/
extern OSG_EXPORT osg::Image* createImageWithOrientationConversion(const osg::Image* srcImage, const osg::Vec3i& srcOrigin, const osg::Vec3i& srcRow, const osg::Vec3i& srcColumn, const osg::Vec3i& srcLayer);
}
#endif
Reference in New Issue View Git Blame Copy Permalink