Chargement d'une image
Chargement d'une image en divers langages.
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#include <jpeglib.h>
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#include <jerror.h>
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using namespace std;
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bool doLoadImage(int parameter) {
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unsigned char * image = (unsigned char *)malloc(3840*1024*3
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*sizeof(unsigned char));
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struct jpeg_decompress_struct cinfo;
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struct jpeg_error_mgr jerr;
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FILE *file;
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unsigned char *ligne;
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int i, j;
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cinfo.err = jpeg_std_error(&jerr);
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jpeg_create_decompress(&cinfo);
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if ((file=fopen("./test.jpg", "rb"))==NULL) {
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fprintf(stderr, "Erreur : impossible d'ouvrir le fichier texture.jpg\n");
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exit(1);
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}
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jpeg_stdio_src(&cinfo, file);
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jpeg_read_header(&cinfo, TRUE);
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bool check=cinfo.image_width==3840 || cinfo.image_height==1024;
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jpeg_start_decompress(&cinfo);
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ligne=image;
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while (cinfo.output_scanline<cinfo.output_height) {
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ligne=image+3*256*cinfo.output_scanline;
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jpeg_read_scanlines(&cinfo, &ligne, 1);
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}
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jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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return check;
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}
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