68 lines
1.1 KiB
C
68 lines
1.1 KiB
C
#include "gd.h"
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#include <stdio.h>
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#include <stdlib.h>
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void save_png(gdImagePtr im, const char *filename)
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{
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FILE *fp;
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fp = fopen(filename, "wb");
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if (!fp) {
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fprintf(stderr, "Can't save png image %s\n", filename);
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return;
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}
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gdImagePng(im, fp);
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fclose(fp);
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}
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gdImagePtr read_png(const char *filename)
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{
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FILE * fp;
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gdImagePtr im;
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fp = fopen(filename, "rb");
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if (!fp) {
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fprintf(stderr, "Can't read png image %s\n", filename);
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return NULL;
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}
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im = gdImageCreateFromPng(fp);
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fclose(fp);
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return im;
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}
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int main()
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{
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gdImagePtr im, im2;
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im = gdImageCreateTrueColor(400, 400);
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if (!im) {
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fprintf(stderr, "Can't create 400x400 TC image\n");
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return 1;
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}
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gdImageFilledRectangle(im, 19, 29, 390, 390, 0xFFFFFF);
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gdImageRectangle(im, 19, 29, 390, 390, 0xFF0000);
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save_png(im, "a1.png");
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im2 = gdImageCropAuto(im, GD_CROP_SIDES);
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if (im2) {
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save_png(im2, "a2.png");
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gdImageDestroy(im2);
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}
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gdImageDestroy(im);
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im = read_png("test_crop_threshold.png");
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if (!im) {
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return 1;
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}
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im2 = gdImageCropThreshold(im, 0xFFFFFF, 0.6);
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if (im2) {
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save_png(im2, "a4.png");
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gdImageDestroy(im2);
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}
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gdImageDestroy(im);
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return 0;
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}
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