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Diffstat (limited to 'Build/source/libs/gd/libgd-src/examples/copyrotated.c')
-rw-r--r--Build/source/libs/gd/libgd-src/examples/copyrotated.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/Build/source/libs/gd/libgd-src/examples/copyrotated.c b/Build/source/libs/gd/libgd-src/examples/copyrotated.c
new file mode 100644
index 00000000000..03e493d0ce0
--- /dev/null
+++ b/Build/source/libs/gd/libgd-src/examples/copyrotated.c
@@ -0,0 +1,91 @@
+/* $Id$ */
+#include "gd.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+gdImagePtr loadImage(const char *name)
+{
+ FILE *fp;
+ gdImagePtr im;
+
+ fp = fopen(name, "rb");
+ if (!fp) {
+ fprintf(stderr, "Can't open jpeg file\n");
+ return NULL;
+ }
+
+ im = gdImageCreateFromJpeg(fp);
+ fclose(fp);
+ return im;
+}
+
+int savePngImage(gdImagePtr im, const char *name)
+{
+ FILE *fp;
+ fp = fopen(name, "wb");
+ if (!fp) {
+ fprintf(stderr, "Can't save png image fromtiff.png\n");
+ return 0;
+ }
+ gdImagePng(im, fp);
+ fclose(fp);
+ return 1;
+}
+
+int main(int argc, char **arg)
+{
+ gdImagePtr im, im2;
+ int new_width, new_height;
+ double angle, a2;
+
+ if (argc < 3) {
+ fprintf(stderr, "Usage: copyrotated [angle in degree] [filename.png]\n");
+ return 1;
+ }
+ angle = strtod(arg[1], 0);
+ im = loadImage(arg[2]);
+
+ if (!im) {
+ fprintf(stderr, "Can't load PNG file <%s>", arg[1]);
+ return 1;
+ }
+
+ /*
+ cos adj hyp (cos = adjacent / hypothenus)
+ sin op hyp (sin adjacent / hypothenus)
+ + 10 pixels margin
+ */
+
+ /* to radian */
+ a2 = angle * .0174532925;
+
+ new_width = ceil(cos(a2) * gdImageSX(im)) +
+ fabs(sin(a2) * gdImageSY(im));
+ new_height = ceil(cos(a2) * gdImageSY(im)) +
+ fabs(sin(a2) * gdImageSX(im));
+
+
+ im2 = gdImageCreateTrueColor(new_width, new_height);
+ if (!im2) {
+ fprintf(stderr, "Can't create a new image");
+ gdImageDestroy(im);
+ return 1;
+ }
+
+ gdImageAlphaBlending(im2, 0);
+ gdImageFilledRectangle(im2, 0, 0, gdImageSX(im2), gdImageSY(im2), gdTrueColorAlpha(127,0,0,127));
+
+ gdImageCopyRotated(im2, im, new_width/2, new_height/2, 0, 0, gdImageSX(im), gdImageSY(im), angle);
+ gdImageSaveAlpha(im2, 1);
+ if (!savePngImage(im2, "rotated.png")) {
+ fprintf(stderr, "Can't save PNG file rotated.png");
+ gdImageDestroy(im);
+ gdImageDestroy(im2);
+ return 1;
+ }
+
+ gdImageDestroy(im2);
+ gdImageDestroy(im);
+ return 0;
+}