Bonjour,
J’ai pris un exemple de création d’une image à l’aide de GD.
J’aimerai avoir une aide concernant le chargement d’une image (on lui donne le nom d’une image) pour récupérer les données (les couleurs de chaque pixel) de celles-ci pour les mettre dans un tableau mais je ne sais pas comment m’y prendre.
Merci
[code]/* Bring in gd library functions */
#include “gd.h”
/* Bring in standard I/O so we can output the PNG to a file */
#include <stdio.h>
int main() {
/* Declare the image /
gdImagePtr im;
/ Declare output files */
FILE *pngout, jpegout;
/ Declare color indexes */
int black;
int white;
/* Allocate the image: 64 pixels across by 64 pixels tall */
im = gdImageCreate(64, 64);
/* Allocate the color black (red, green and blue all minimum).
Since this is the first color in a new image, it will
be the background color. */
black = gdImageColorAllocate(im, 0, 0, 0);
/* Allocate the color white (red, green and blue all maximum). */
white = gdImageColorAllocate(im, 255, 255, 255);
/* Draw a line from the upper left to the lower right,
using white color index. */
gdImageLine(im, 0, 0, 63, 63, white);
/* Open a file for writing. "wb" means "write binary", important
under MSDOS, harmless under Unix. */
pngout = fopen("test.png", "wb");
/* Do the same for a JPEG-format file. */
jpegout = fopen("test.jpg", "wb");
/* Output the image to the disk file in PNG format. */
gdImagePng(im, pngout);
/* Output the same image in JPEG format, using the default
JPEG quality setting. */
gdImageJpeg(im, jpegout, -1);
/* Close the files. */
fclose(pngout);
fclose(jpegout);
/* Destroy the image in memory. */
gdImageDestroy(im);
}[/code]