80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
#include <iostream>
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#include <stdio.h>
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#include <jpeglib.h>
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using namespace std;
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int * loadJpg(const char* Name) {
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unsigned char a, r, g, b;
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int width, height;
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struct jpeg_decompress_struct cinfo;
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struct jpeg_error_mgr jerr;
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FILE * infile; /* source file */
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JSAMPARRAY pJpegBuffer; /* Output row buffer */
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int row_stride; /* physical row width in output buffer */
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if ((infile = fopen(Name, "rb")) == NULL) {
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fprintf(stderr, "can't open %s\n", Name);
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return 0;
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}
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cinfo.err = jpeg_std_error(&jerr);
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jpeg_create_decompress(&cinfo);
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jpeg_stdio_src(&cinfo, infile);
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(void) jpeg_read_header(&cinfo, TRUE);
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(void) jpeg_start_decompress(&cinfo);
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width = cinfo.output_width;
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height = cinfo.output_height;
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unsigned char * pDummy = new unsigned char [width*height*4];
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unsigned char * pTest = pDummy;
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if (!pDummy) {
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printf("NO MEM FOR JPEG CONVERT!\n");
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return 0;
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}
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row_stride = width * cinfo.output_components;
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pJpegBuffer = (*cinfo.mem->alloc_sarray)
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((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
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while (cinfo.output_scanline < cinfo.output_height) {
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(void) jpeg_read_scanlines(&cinfo, pJpegBuffer, 1);
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for (int x = 0; x < width; x++) {
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a = 0; // alpha value is not supported on jpg
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r = pJpegBuffer[0][cinfo.output_components * x];
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if (cinfo.output_components > 2) {
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g = pJpegBuffer[0][cinfo.output_components * x + 1];
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b = pJpegBuffer[0][cinfo.output_components * x + 2];
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} else {
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g = r;
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b = r;
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}
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*(pDummy++) = b;
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*(pDummy++) = g;
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*(pDummy++) = r;
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*(pDummy++) = a;
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}
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}
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fclose(infile);
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(void) jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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/*BMap = (int*)pTest;
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Height = height;
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Width = width;
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Depth = 32;*/
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int * pJetze = (int*)pTest;
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cout << width << endl;
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return pJetze;
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}
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int main()
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{
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int * pJetze = loadJpg("../img/foregrounds/2.jpeg");
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cout << pJetze[0] << endl;
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cout << pJetze[1] << endl;
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cout << pJetze[2] << endl;
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cout << pJetze[3] << endl;
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cout << "Hello world!" << endl;
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return 0;
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}
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