- #136 add crop image support

 - gdImageCrop, gdImageAutoCrop and gdImageThresholdCrop
 - add gdRect struct to define a rectangle area at position (x,y) with
   a given width and height

3 files changed, 91 insertions, 3 deletions

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 842a6c4..26e2de4 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,14 +1,14 @@
 
-message("inc: ${GD_INCLUDE_DIR}")
 include_directories (BEFORE ${GD_SOURCE_DIR}/src "${CMAKE_BINARY_DIR}")
 
 
 SET(TESTS_FILES
-  tiffread	
+  tiffread
+  tgaread
+  crop
 )
 
 FOREACH(test_name ${TESTS_FILES})
 	add_executable(${test_name} "${test_name}.c")
 	target_link_libraries (${test_name} ${GD_LIB})
-	ADD_TEST(${test_name} ${EXECUTABLE_OUTPUT_PATH}/${test_name})
 ENDFOREACH(test_name)
diff --git a/examples/crop.c b/examples/crop.c
new file mode 100644
index 0000000..f4e8a99
--- /dev/null
+++ b/examples/crop.c
@@ -0,0 +1,88 @@
+/* $Id$ */
+/*
+ * You can fetch a set of samples TIFF images here:
+ * ftp://ftp.remotesensing.org/pub/libtiff/
+ * (pics-x.y.z.tar.gz)
+ */
+
+#include "gd.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+void save_png(gdImagePtr im, const char *filename)
+{
+	FILE *fp;
+	fp = fopen(filename, "wb");
+	if (!fp) {
+		fprintf(stderr, "Can't save png image %s\n", filename);
+		return;
+	}
+	gdImagePng(im, fp);
+	fclose(fp);
+}
+
+gdImagePtr read_png(const char *filename)
+{
+	FILE * fp;
+	gdImagePtr im;
+
+	fp = fopen(filename, "rb");
+	if (!fp) {
+		fprintf(stderr, "Can't read png image %s\n", filename);
+		return NULL;
+	}
+	im = gdImageCreateFromPng(fp);
+	fclose(fp);
+	return im;
+}
+
+int main()
+{
+ 	gdImagePtr im, im2;
+	FILE *fp;
+	char path[2048];
+	char dst[2048];
+
+	im = gdImageCreateTrueColor(400, 400);
+
+	if (!im) {
+		fprintf(stderr, "Can't create 400x400 TC image\n", path);
+		return 1;
+	}
+
+	gdImageFilledRectangle(im, 19, 29, 390, 390, 0xFFFFFF);
+	gdImageRectangle(im, 19, 29, 390, 390, 0xFF0000);
+	save_png(im, "a1.png");
+
+	im2 = gdImageAutoCrop(im, GD_CROP_SIDES);
+	if (im2) {
+		save_png(im2, "a2.png");
+		gdImageDestroy(im2);
+	}
+	gdImageDestroy(im);
+
+	im = read_png("test_crop_threshold.png");
+	if (!im) {
+		return 1;
+	}
+
+	im2 = gdImageThresholdCrop(im, 0xFFFFFF, 120);
+	if (im2) {
+		save_png(im2, "a3.png");
+		gdImageDestroy(im2);
+	}
+	gdImageDestroy(im);
+
+	im = read_png("test_crop_threshold.png");
+	if (!im) {
+		return 1;
+	}
+
+	im2 = gdImageThresholdCrop(im, 0xFFFFFF, 70);
+	if (im2) {
+		save_png(im2, "a4.png");
+		gdImageDestroy(im2);
+	}
+
+	gdImageDestroy(im);
+}
diff --git a/examples/test_crop_threshold.png b/examples/test_crop_threshold.png
new file mode 100644
index 0000000..4a9dff1
--- /dev/null
+++ b/examples/test_crop_threshold.png