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From: | "Michael Stewart" <mike AT reggin DOT freeserve DOT co DOT uk> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Flipping an image |
Date: | Wed, 14 Jul 1999 09:15:11 +0100 |
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To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
Mark Phillips wrote in message ... >> 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, tmp; for (row_count = 0; row_count < rows; row_count++) { for(col_count = 0; col_count < cols / 2; 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. Doh! The above code has been changed to use cols/2. Sorry about that.
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