version depends on gd and creates a traditional captcha

4 files changed, 79 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7e71228
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,11 @@
+all:
+        $(CC) -Wall -g -lgd -o captcha -Wl,-rpath=libs/ -L../ -l:libfile_reader.so captcha.c
+        $(CC) -Wall -g -shared -fPIC -lgd -L../ -l:libfile_reader.so -o captcha.so captcha.c
+        #$(CC) -Wall -g -lgd -o captcha ../file_reader/file_reader.a captcha.c
+
+libs:
+        #$(CC) -Wall -g -shared -fPIC -lgd -Wl,-rpath=../file/reader/ -L../file/reader/ -l:file_reader.so -o captcha.so captcha.c
+        #$(CC) -Wall -g -lgd -Wl,-rpath=../file/reader/ -L../file/reader/ -o captcha ../file/reader/file_reader.a captcha.c 
+
+strip:
+        strip -s *.so
diff --git a/captcha.c b/captcha.c
new file mode 100644
index 0000000..18f7d99
--- /dev/null
+++ b/captcha.c
@@ -0,0 +1,51 @@
+#include "captcha.h"
+
+int captcha_print(char* text)
+{
+  File* file = file_open("code.png");
+
+  gdImagePtr im = gdImageCreateFromPngPtr(file->size, file->data);
+  gdImageColorTransparent(im, gdImageColorAllocate(im, 255, 255, 255));
+  
+  char  text_width = strlen(text);
+  float letter_width = ((float) gdImageSX(im) / 26.00);
+
+  int image_width = letter_width * text_width;
+  int image_height = gdImageSY(im);
+
+  gdImagePtr image = gdImageCreateTrueColor(image_width, image_height);
+  gdImageColorTransparent(image, gdImageColorAllocate(image, 0, 0, 0));
+
+  srand(time(NULL) * (*text));
+  int i;
+  for(i=0; i<=10; i++)
+  {
+    int x1 = ((double) rand() / RAND_MAX) * image_width;
+    int y1 = ((double) rand() / RAND_MAX) * image_height;
+    gdImageFilledArc(image, x1, y1, x1 + 10, y1 + 10, ((double) rand() / RAND_MAX) * 360, ((double) rand() / RAND_MAX) * 360, gdImageColorAllocate(image, 100 + (rand() * 155), 150 + (rand() * 105), 150 + (rand() * 105)), gdEdged);
+  }
+
+  int pos;
+  for(pos=0; text[pos]!='\0'; pos++)
+  {
+    //printf("[pos:%d] %d\n", pos, (text[pos] - 65) );
+    gdImageCopyMerge(image, im, 
+        letter_width * pos, 0, 
+        ((text[pos] - 65) * letter_width), 0, 
+        letter_width, gdImageSY(image), 50);
+  }
+
+  puts("content-type: image/jpeg\n");
+  gdImageJpeg(image, stdout, 80);
+
+  gdImageDestroy(image);
+  gdImageDestroy(im);
+
+  file_close(file);
+  return EXIT_SUCCESS;
+}
+
+int main()
+{
+  return captcha_print("HALLELUJA");
+}
diff --git a/captcha.h b/captcha.h
new file mode 100644
index 0000000..2aa6475
--- /dev/null
+++ b/captcha.h
@@ -0,0 +1,17 @@
+#ifndef CAPTCHA_H
+#define CAPTCHA_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <err.h>
+
+#include <time.h> // used for rand()
+#include <string.h>
+
+#include "gd.h"
+#include "../file_reader/file_reader.h"
+
+
+int captcha_print(char* text);
+
+#endif
diff --git a/code.png b/code.png
new file mode 100644
index 0000000..df904ae
--- /dev/null
+++ b/code.png