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From: | Mark Phillips <umphill5 AT cs DOT umanitoba DOT ca> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Flipping an image |
Date: | Tue, 13 Jul 1999 11:33:30 -0500 |
Organization: | The University of Manitoba |
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Message-ID: | <Pine.SUN.3.96.990713113215.6737A-100000@silver.cs.umanitoba.ca> |
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> Alan Wills wrote in message <7mf2qk$nlg$1 AT rockall DOT cc DOT strath DOT ac DOT uk>... > >void flip_image(int array[], int rows, int cols) > >{ > >int row_count, col_count, total_pixelsp; > > > > for(row_count = 0; row_count < rows; row_count++) > > { > > for(col_count = 0; col_count < cols; col_count++) > > { > > > // Something like this ? (note: this is untested) > tmp = array[row_count * cols + col_count]; > array[row_count * cols + col_count] = array[(row_count + 1) * cols - 1 - > col_count]; > array[(row_count + 1) * cols - 1 - col_count] = tmp; > > > } > > } > >} I'm pretty sure if you do it this way you'll only want the inside loop to go up to cols/2 instead of cols since then you'd be flipping the image and then re-flipping it back the way it was. mark
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