Cleaned up example to use the new ImageUtils functions for creating a 3D image from a list of images.
This commit is contained in:
Robert Osfield
parent
86439123b4
commit
1fbbd347bf
@ -78,30 +78,43 @@ enum ShadingModel
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MaximumIntensityProjection
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};
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struct PassThroughTransformFunction
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osg::Image* createTexture3D(osg::ImageList& imageList,
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unsigned int numComponentsDesired,
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int s_maximumTextureSize,
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int t_maximumTextureSize,
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int r_maximumTextureSize,
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bool resizeToPowerOfTwo)
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{
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unsigned char operator() (unsigned char c) const { return c; }
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};
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void clampToNearestValidPowerOfTwo(int& sizeX, int& sizeY, int& sizeZ, int s_maximumTextureSize, int t_maximumTextureSize, int r_maximumTextureSize)
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if (numComponentsDesired==0)
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{
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// compute nearest powers of two for each axis.
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int s_nearestPowerOfTwo = 1;
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while(s_nearestPowerOfTwo<sizeX && s_nearestPowerOfTwo<s_maximumTextureSize) s_nearestPowerOfTwo*=2;
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int t_nearestPowerOfTwo = 1;
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while(t_nearestPowerOfTwo<sizeY && t_nearestPowerOfTwo<t_maximumTextureSize) t_nearestPowerOfTwo*=2;
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int r_nearestPowerOfTwo = 1;
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while(r_nearestPowerOfTwo<sizeZ && r_nearestPowerOfTwo<r_maximumTextureSize) r_nearestPowerOfTwo*=2;
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sizeX = s_nearestPowerOfTwo;
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sizeY = t_nearestPowerOfTwo;
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sizeZ = r_nearestPowerOfTwo;
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return osg::createImage3DWithAlpha(imageList,
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s_maximumTextureSize,
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t_maximumTextureSize,
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r_maximumTextureSize,
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resizeToPowerOfTwo);
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}
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else
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{
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GLenum desiredPixelFormat = 0;
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switch(numComponentsDesired)
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{
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case(1) : desiredPixelFormat = GL_LUMINANCE; break;
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case(2) : desiredPixelFormat = GL_LUMINANCE_ALPHA; break;
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case(3) : desiredPixelFormat = GL_RGB; break;
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case(4) : desiredPixelFormat = GL_RGBA; break;
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}
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return osg::createImage3D(imageList,
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desiredPixelFormat,
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s_maximumTextureSize,
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t_maximumTextureSize,
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r_maximumTextureSize,
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resizeToPowerOfTwo);
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}
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}
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#if 1
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struct ModulateAlphaByLuminanceOperator
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{
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ModulateAlphaByLuminanceOperator() {}
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@ -113,547 +126,6 @@ struct ModulateAlphaByLuminanceOperator
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inline void rgba(float& r,float& g,float& b,float& a) const { float l = (r+g+b)*0.3333333; a *= l;}
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};
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osg::Image* createTexture3D(osg::ImageList& imageList,
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unsigned int numComponentsDesired,
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int s_maximumTextureSize,
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int t_maximumTextureSize,
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int r_maximumTextureSize,
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bool resizeToPowerOfTwo)
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{
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GLenum desiredPixelFormat = 0;
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bool modulateAlphaByLuminance = false;
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if (numComponentsDesired==0)
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{
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unsigned int maxNumComponents = osg::maximimNumOfComponents(imageList);
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if (maxNumComponents==3)
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{
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desiredPixelFormat = GL_RGBA;
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modulateAlphaByLuminance = true;
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}
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}
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else
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{
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switch(numComponentsDesired)
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{
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case(1) : desiredPixelFormat = GL_LUMINANCE; break;
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case(2) : desiredPixelFormat = GL_LUMINANCE_ALPHA; break;
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case(3) : desiredPixelFormat = GL_RGB; break;
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case(4) : desiredPixelFormat = GL_RGBA; break;
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}
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}
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osg::ref_ptr<osg::Image> image = osg::createImage3D(imageList,
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desiredPixelFormat,
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s_maximumTextureSize,
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t_maximumTextureSize,
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r_maximumTextureSize,
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resizeToPowerOfTwo);
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if (image.valid())
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{
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if (modulateAlphaByLuminance)
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{
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osg::modifyImage(image.get(), ModulateAlphaByLuminanceOperator());
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}
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return image.release();
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}
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else
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{
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return 0;
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}
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}
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#else
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struct ProcessRow
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{
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virtual ~ProcessRow() {}
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virtual void operator() (unsigned int num,
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GLenum source_pixelFormat, unsigned char* source,
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GLenum dest_pixelFormat, unsigned char* dest) const
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{
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switch(source_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA):
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switch(dest_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA): A_to_A(num, source, dest); break;
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case(GL_LUMINANCE_ALPHA): A_to_LA(num, source, dest); break;
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case(GL_RGB): A_to_RGB(num, source, dest); break;
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case(GL_RGBA): A_to_RGBA(num, source, dest); break;
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}
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break;
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case(GL_LUMINANCE_ALPHA):
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switch(dest_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA): LA_to_A(num, source, dest); break;
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case(GL_LUMINANCE_ALPHA): LA_to_LA(num, source, dest); break;
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case(GL_RGB): LA_to_RGB(num, source, dest); break;
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case(GL_RGBA): LA_to_RGBA(num, source, dest); break;
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}
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break;
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case(GL_RGB):
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switch(dest_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA): RGB_to_A(num, source, dest); break;
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case(GL_LUMINANCE_ALPHA): RGB_to_LA(num, source, dest); break;
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case(GL_RGB): RGB_to_RGB(num, source, dest); break;
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case(GL_RGBA): RGB_to_RGBA(num, source, dest); break;
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}
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break;
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case(GL_RGBA):
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switch(dest_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA): RGBA_to_A(num, source, dest); break;
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case(GL_LUMINANCE_ALPHA): RGBA_to_LA(num, source, dest); break;
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case(GL_RGB): RGBA_to_RGB(num, source, dest); break;
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case(GL_RGBA): RGBA_to_RGBA(num, source, dest); break;
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}
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break;
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case(GL_BGR):
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switch(dest_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA): BGR_to_A(num, source, dest); break;
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case(GL_LUMINANCE_ALPHA): BGR_to_LA(num, source, dest); break;
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case(GL_RGB): BGR_to_RGB(num, source, dest); break;
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case(GL_RGBA): BGR_to_RGBA(num, source, dest); break;
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}
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break;
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case(GL_BGRA):
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switch(dest_pixelFormat)
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{
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case(GL_LUMINANCE):
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case(GL_ALPHA): BGRA_to_A(num, source, dest); break;
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case(GL_LUMINANCE_ALPHA): BGRA_to_LA(num, source, dest); break;
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case(GL_RGB): BGRA_to_RGB(num, source, dest); break;
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case(GL_RGBA): BGRA_to_RGBA(num, source, dest); break;
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}
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break;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// alpha sources..
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virtual void A_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source++;
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}
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}
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virtual void A_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source;
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*dest++ = *source++;
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}
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}
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virtual void A_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source;
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*dest++ = *source;
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*dest++ = *source++;
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}
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}
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virtual void A_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source;
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*dest++ = *source;
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*dest++ = *source;
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*dest++ = *source++;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// alpha luminance sources..
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virtual void LA_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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++source;
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*dest++ = *source++;
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}
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}
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virtual void LA_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source++;
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*dest++ = *source++;
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}
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}
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virtual void LA_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source;
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*dest++ = *source;
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*dest++ = *source;
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source+=2;
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}
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}
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virtual void LA_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source;
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*dest++ = *source;
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*dest++ = *source++;
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*dest++ = *source++;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// RGB sources..
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virtual void RGB_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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*dest++ = val;
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source += 3;
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}
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}
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virtual void RGB_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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*dest++ = val;
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*dest++ = val;
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source += 3;
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}
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}
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virtual void RGB_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source++;
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*dest++ = *source++;
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*dest++ = *source++;
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}
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}
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virtual void RGB_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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*dest++ = *source++;
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*dest++ = *source++;
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*dest++ = *source++;
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*dest++ = val;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// RGBA sources..
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virtual void RGBA_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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source += 3;
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*dest++ = *source++;
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}
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}
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virtual void RGBA_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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source += 3;
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*dest++ = val;
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*dest++ = *source++;
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}
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}
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virtual void RGBA_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source++;
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*dest++ = *source++;
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*dest++ = *source++;
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++source;
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}
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}
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virtual void RGBA_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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*dest++ = *source++;
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*dest++ = *source++;
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*dest++ = *source++;
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*dest++ = *source++;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// BGR sources..
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virtual void BGR_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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*dest++ = val;
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source += 3;
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}
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}
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virtual void BGR_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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*dest++ = val;
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*dest++ = val;
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source += 3;
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}
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}
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virtual void BGR_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char blue = *source++;
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unsigned char green = *source++;
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unsigned char red = *source++;
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*dest++ = red;
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*dest++ = green;
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*dest++ = blue;
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}
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}
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virtual void BGR_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char blue = *source++;
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unsigned char green = *source++;
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unsigned char red = *source++;
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unsigned char val = (unsigned char)((int(red)+int(green)+int(blue))/3);
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*dest++ = red;
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*dest++ = green;
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*dest++ = blue;
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*dest++ = val;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// BGRA sources..
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virtual void BGRA_to_A(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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source += 3;
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*dest++ = *source++;
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}
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}
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virtual void BGRA_to_LA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char val = *source;
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source += 3;
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*dest++ = val;
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*dest++ = *source++;
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}
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}
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virtual void BGRA_to_RGB(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char blue = *source++;
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unsigned char green = *source++;
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unsigned char red = *source++;
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*dest++ = red;
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*dest++ = green;
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*dest++ = blue;
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++source;
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}
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}
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virtual void BGRA_to_RGBA(unsigned int num, unsigned char* source, unsigned char* dest) const
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{
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for(unsigned int i=0;i<num;++i)
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{
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unsigned char blue = *source++;
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unsigned char green = *source++;
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unsigned char red = *source++;
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unsigned char alpha = *source++;
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*dest++ = red;
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*dest++ = green;
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*dest++ = blue;
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*dest++ = alpha;
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}
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}
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};
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osg::Image* createTexture3D(osg::ImageList& imageList,
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unsigned int numComponentsDesired,
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int s_maximumTextureSize,
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int t_maximumTextureSize,
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int r_maximumTextureSize,
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bool resizeToPowerOfTwo)
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{
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ProcessRow processRow;
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int max_s = 0;
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int max_t = 0;
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unsigned int max_components = 0;
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int total_r = 0;
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osg::ImageList::iterator itr;
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for(itr=imageList.begin();
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itr!=imageList.end();
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++itr)
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{
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osg::Image* image = itr->get();
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GLenum pixelFormat = image->getPixelFormat();
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if (pixelFormat==GL_ALPHA ||
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pixelFormat==GL_INTENSITY ||
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pixelFormat==GL_LUMINANCE ||
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pixelFormat==GL_LUMINANCE_ALPHA ||
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pixelFormat==GL_RGB ||
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pixelFormat==GL_RGBA ||
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pixelFormat==GL_BGR ||
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pixelFormat==GL_BGRA)
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{
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max_s = osg::maximum(image->s(), max_s);
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max_t = osg::maximum(image->t(), max_t);
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max_components = osg::maximum(osg::Image::computeNumComponents(pixelFormat), max_components);
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total_r += image->r();
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}
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else
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{
|
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osg::notify(osg::NOTICE)<<"Image "<<image->getFileName()<<" has unsuitable pixel format 0x"<< std::hex<< pixelFormat << std::dec << std::endl;
|
||||
}
|
||||
}
|
||||
|
||||
if (max_components==3)
|
||||
{
|
||||
// change RGB to a RGBA
|
||||
max_components = 4;
|
||||
}
|
||||
|
||||
if (numComponentsDesired!=0) max_components = numComponentsDesired;
|
||||
|
||||
GLenum desiredPixelFormat = 0;
|
||||
switch(max_components)
|
||||
{
|
||||
case(1):
|
||||
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_LUMINANCE" << std::endl;
|
||||
desiredPixelFormat = GL_LUMINANCE;
|
||||
break;
|
||||
case(2):
|
||||
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_LUMINANCE_ALPHA" << std::endl;
|
||||
desiredPixelFormat = GL_LUMINANCE_ALPHA;
|
||||
break;
|
||||
case(3):
|
||||
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_RGB" << std::endl;
|
||||
desiredPixelFormat = GL_RGB;
|
||||
break;
|
||||
case(4):
|
||||
osg::notify(osg::NOTICE)<<"desiredPixelFormat = GL_RGBA" << std::endl;
|
||||
desiredPixelFormat = GL_RGBA;
|
||||
break;
|
||||
}
|
||||
if (desiredPixelFormat==0) return 0;
|
||||
|
||||
// compute nearest powers of two for each axis.
|
||||
|
||||
int s_nearestPowerOfTwo = 1;
|
||||
int t_nearestPowerOfTwo = 1;
|
||||
int r_nearestPowerOfTwo = 1;
|
||||
|
||||
if (resizeToPowerOfTwo)
|
||||
{
|
||||
while(s_nearestPowerOfTwo<max_s && s_nearestPowerOfTwo<s_maximumTextureSize) s_nearestPowerOfTwo*=2;
|
||||
while(t_nearestPowerOfTwo<max_t && t_nearestPowerOfTwo<t_maximumTextureSize) t_nearestPowerOfTwo*=2;
|
||||
while(r_nearestPowerOfTwo<total_r && r_nearestPowerOfTwo<r_maximumTextureSize) r_nearestPowerOfTwo*=2;
|
||||
|
||||
osg::notify(osg::NOTICE)<<"max image width = "<<max_s<<" nearest power of two = "<<s_nearestPowerOfTwo<<std::endl;
|
||||
osg::notify(osg::NOTICE)<<"max image height = "<<max_t<<" nearest power of two = "<<t_nearestPowerOfTwo<<std::endl;
|
||||
osg::notify(osg::NOTICE)<<"max image depth = "<<total_r<<" nearest power of two = "<<r_nearestPowerOfTwo<<std::endl;
|
||||
}
|
||||
else
|
||||
{
|
||||
s_nearestPowerOfTwo = max_s;
|
||||
t_nearestPowerOfTwo = max_t;
|
||||
r_nearestPowerOfTwo = total_r;
|
||||
}
|
||||
|
||||
// now allocate the 3d texture;
|
||||
osg::ref_ptr<osg::Image> image_3d = new osg::Image;
|
||||
image_3d->allocateImage(s_nearestPowerOfTwo,t_nearestPowerOfTwo,r_nearestPowerOfTwo,
|
||||
desiredPixelFormat,GL_UNSIGNED_BYTE);
|
||||
|
||||
|
||||
unsigned int r_offset = (total_r<r_nearestPowerOfTwo) ? r_nearestPowerOfTwo/2 - total_r/2 : 0;
|
||||
|
||||
int curr_dest_r = r_offset;
|
||||
|
||||
// copy across the values from the source images into the image_3d.
|
||||
for(itr=imageList.begin();
|
||||
itr!=imageList.end();
|
||||
++itr)
|
||||
{
|
||||
osg::Image* image = itr->get();
|
||||
GLenum pixelFormat = image->getPixelFormat();
|
||||
if (pixelFormat==GL_ALPHA ||
|
||||
pixelFormat==GL_LUMINANCE ||
|
||||
pixelFormat==GL_INTENSITY ||
|
||||
pixelFormat==GL_LUMINANCE_ALPHA ||
|
||||
pixelFormat==GL_RGB ||
|
||||
pixelFormat==GL_RGBA ||
|
||||
pixelFormat==GL_BGR ||
|
||||
pixelFormat==GL_BGRA)
|
||||
{
|
||||
|
||||
int num_r = osg::minimum(image->r(), (image_3d->r() - curr_dest_r));
|
||||
int num_t = osg::minimum(image->t(), image_3d->t());
|
||||
int num_s = osg::minimum(image->s(), image_3d->s());
|
||||
|
||||
unsigned int s_offset_dest = (image->s()<s_nearestPowerOfTwo) ? s_nearestPowerOfTwo/2 - image->s()/2 : 0;
|
||||
unsigned int t_offset_dest = (image->t()<t_nearestPowerOfTwo) ? t_nearestPowerOfTwo/2 - image->t()/2 : 0;
|
||||
|
||||
for(int r=0;r<num_r;++r, ++curr_dest_r)
|
||||
{
|
||||
for(int t=0;t<num_t;++t)
|
||||
{
|
||||
unsigned char* dest = image_3d->data(s_offset_dest,t+t_offset_dest,curr_dest_r);
|
||||
unsigned char* source = image->data(0,t,r);
|
||||
|
||||
processRow(num_s, image->getPixelFormat(), source, image_3d->getPixelFormat(), dest);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return image_3d.release();
|
||||
}
|
||||
#endif
|
||||
|
||||
struct ScaleOperator
|
||||
{
|
||||
@ -701,6 +173,23 @@ struct WriteRowOperator
|
||||
inline void rgba(float& r,float& g,float& b,float& a) const { r = _colours[_pos].r(); g = _colours[_pos].g(); b = _colours[_pos].b(); a = _colours[_pos++].a(); }
|
||||
};
|
||||
|
||||
void clampToNearestValidPowerOfTwo(int& sizeX, int& sizeY, int& sizeZ, int s_maximumTextureSize, int t_maximumTextureSize, int r_maximumTextureSize)
|
||||
{
|
||||
// compute nearest powers of two for each axis.
|
||||
int s_nearestPowerOfTwo = 1;
|
||||
while(s_nearestPowerOfTwo<sizeX && s_nearestPowerOfTwo<s_maximumTextureSize) s_nearestPowerOfTwo*=2;
|
||||
|
||||
int t_nearestPowerOfTwo = 1;
|
||||
while(t_nearestPowerOfTwo<sizeY && t_nearestPowerOfTwo<t_maximumTextureSize) t_nearestPowerOfTwo*=2;
|
||||
|
||||
int r_nearestPowerOfTwo = 1;
|
||||
while(r_nearestPowerOfTwo<sizeZ && r_nearestPowerOfTwo<r_maximumTextureSize) r_nearestPowerOfTwo*=2;
|
||||
|
||||
sizeX = s_nearestPowerOfTwo;
|
||||
sizeY = t_nearestPowerOfTwo;
|
||||
sizeZ = r_nearestPowerOfTwo;
|
||||
}
|
||||
|
||||
osg::Image* readRaw(int sizeX, int sizeY, int sizeZ, int numberBytesPerComponent, int numberOfComponents, const std::string& endian, const std::string& raw_filename)
|
||||
{
|
||||
osgDB::ifstream fin(raw_filename.c_str(), std::ifstream::binary);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user