164 lines
9.2 KiB
C++
164 lines
9.2 KiB
C++
/* -*-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>
|
|
|
|
namespace osg {
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
|
|
}
|
|
|
|
|
|
#endif
|