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79 lines
2 KiB
C++
79 lines
2 KiB
C++
#include "PixRaster.h"
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#include <Draw/Draw.h>
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NAMESPACE_UPP
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///////////////////////////////////////////////////////////////////////////////
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// All Leptonica routines operates on Pix data structures; here 2 conversion
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// routines are provided to go to/from Upp Images
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// Creation of Pix image from an Upp Image
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// As Upp Image is in RGBA format, it's simply converted
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// to an RGB Leptonica Pix; alpha channel is discarded
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PIX *Image2Pix(const Image &img)
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{
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PIX *pix;
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// Get image sizes
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int width = img.GetWidth();
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int height = img.GetHeight();
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// Get image sizes in dots
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int sizeX = img.GetDots().cx;
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int sizeY = img.GetDots().cy;
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// Allocates the Pix structure
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pix = pixCreateNoInit(width, height, 32);
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if(!pix)
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return NULL;
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// sets image resolution (if any)
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// don't know if it's correct, yet....
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pixSetResolution(pix, sizeX / width, sizeY / height);
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// transfer the image bytes
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memcpy(pixGetData(pix), ~img, 4*width*height);
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return pix;
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} // END Image2Pix()
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///////////////////////////////////////////////////////////////////////////////
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// Creation of Upp Image from Pix
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// Pix is first converted to an RGB format, then to Upp Image
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Image Pix2Image(PIX * pix)
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{
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bool destroyCopy = false;
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// colormapped and non-32 bit depth pixs need conversion before
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if(pixGetColormap(pix) || pixGetDepth(pix) != 32)
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{
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// we need to destroy converted pix on exit
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destroyCopy = true;
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// convert pix to 32 bit format
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pix = pixConvertTo32(pix);
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if(!pix)
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return Image();
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}
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// just copy data buffer to a new imagebuffer
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int width = pixGetWidth(pix);
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int height = pixGetHeight(pix);
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ImageBuffer img(width, height);
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memcpy(~img, pixGetData(pix), 4*width*height);
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// sets image type to opaque
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// not sure if we must set alpha bit to 255......
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img.SetKind(IMAGE_OPAQUE);
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if(destroyCopy)
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pixDestroy(&pix);
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return img;
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}
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END_UPP_NAMESPACE
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