* Added bezier files, lolz.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2789 92316355-f0b4-4df1-b90c-862c8a59935f

examples/bezier.c

@@ -0,0 +1,47 @@
+#include "config.h"
+#include "common.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <pipi.h>
+
+int main(int argc, char *argv[])
+{
+    char *srcname = NULL, *dstname = NULL;
+    pipi_image_t *img, *newimg;
+    int ret = 0;
+    if(argc < 2)
+    {
+        fprintf(stderr, "%s: too few arguments\n", argv[0]);
+        fprintf(stderr, "Usage: %s <src> <dest>\n", argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    srcname = argv[1];
+    dstname = argv[2];
+
+    img = pipi_load(srcname);
+
+    if(!img) {
+        fprintf(stderr, "Can't open %s for reading\n", srcname);
+        return -1;
+    }
+
+    newimg = pipi_copy(img);
+    pipi_free(img);
+
+    int w = pipi_get_image_width(newimg);
+    int h = pipi_get_image_height(newimg);
+
+
+    pipi_draw_bezier4(newimg , 1, 1, w-1, 1, w-1, h-1, 1, h-1 , 0x00FF0000, 20, 1);
+
+    pipi_save(newimg, dstname);
+
+    pipi_free(newimg);
+
+    return ret;
+}
+

pipi/paint/bezier.c

@@ -0,0 +1,59 @@
+/*
+ *  libpipi       Proper image processing implementation library
+ *  Copyright (c) 2004-2008 Sam Hocevar <sam@zoy.org>
+ *                2008 Jean-Yves Lamoureux <jylam@lnxscene.org
+ *                All Rights Reserved
+ *
+ *  $Id$
+ *
+ *  This library is free software. It comes without any warranty, to
+ *  the extent permitted by applicable law. You can redistribute it
+ *  and/or modify it under the terms of the Do What The Fuck You Want
+ *  To Public License, Version 2, as published by Sam Hocevar. See
+ *  http://sam.zoy.org/wtfpl/COPYING for more details.
+ */
+
+/*
+ * bezier.c: bezier curves rendering functions
+ */
+
+#include "config.h"
+#include "common.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "pipi.h"
+#include "pipi_internals.h"
+
+
+int pipi_draw_bezier4(pipi_image_t *img ,
+                      int x1, int y1,
+                      int x2, int y2,
+                      int x3, int y3,
+                      int x4, int y4,
+                      uint32_t c, int n, int aa)
+{
+    if(img->last_modified == PIPI_PIXELS_RGBA_C)
+    {
+        float t;
+        float x= x1, y= y1;
+        float lx, ly;
+        for(t=0; t<1; t+=(1.0f/n))
+        {
+            float a = t;
+            float b = 1 - t;
+
+            lx = x; ly = y;
+
+            x = (x1*(b*b*b)) + 3*x2*(b*b)*a + 3*x4*b*(a*a) + x3*(a*a*a);
+            y = (y1*(b*b*b)) + 3*y2*(b*b)*a + 3*y4*b*(a*a) + y3*(a*a*a);
+
+            pipi_draw_line(img , lx, ly, x, y, c, aa);
+        }
+        pipi_draw_line(img , x, y, x3, y3, c, aa);
+    }
+
+    return 0;
+}