From edd4a03a1e675745a6e5bc1c561b12971b6d179a Mon Sep 17 00:00:00 2001
From: sam <sam@92316355-f0b4-4df1-b90c-862c8a59935f>
Date: Thu, 14 Aug 2008 18:34:51 +0000
Subject: [PATCH]   * Add the --scale flag. Resizes the image like --geometry,
 except with     relative parameters.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2716 92316355-f0b4-4df1-b90c-862c8a59935f
---
 pipi/context.c | 25 +++++++++++++++++++++++++
 src/pipi.c     |  8 ++++++++
 2 files changed, 33 insertions(+)

diff --git a/pipi/context.c b/pipi/context.c
index 0cb0ad7..5d86be1 100644
--- a/pipi/context.c
+++ b/pipi/context.c
@@ -167,6 +167,31 @@ int pipi_command(pipi_context_t *ctx, char const *cmd, ...)
         pipi_free(src);
         ctx->images[ctx->nimages - 1] = dst;
     }
+    else if(!strcmp(cmd, "scale"))
+    {
+        pipi_image_t *src, *dst;
+        char const *arg;
+        va_list ap;
+        double scale;
+        int w, h;
+
+        if(ctx->nimages < 1)
+            return -1;
+        src = ctx->images[ctx->nimages - 1];
+        va_start(ap, cmd);
+        arg = va_arg(ap, char const *);
+        va_end(ap);
+        scale = atof(arg);
+        w = (int)(scale * src->w + 0.5);
+        h = (int)(scale * src->h + 0.5);
+        if(w <= 0 || h <= 0)
+            return -1;
+        dst = pipi_resize(src, w, h);
+        if(dst == NULL)
+            return -1;
+        pipi_free(src);
+        ctx->images[ctx->nimages - 1] = dst;
+    }
     else if(!strcmp(cmd, "mean"))
     {
         pipi_image_t *dst;
diff --git a/src/pipi.c b/src/pipi.c
index 75c552f..b4be763 100644
--- a/src/pipi.c
+++ b/src/pipi.c
@@ -25,6 +25,14 @@ int main(int argc, char *argv[])
             if(pipi_command(ctx, "swap") != 0)
                 return EXIT_FAILURE;
         }
+        else if(!strcmp(argv[0], "--scale"))
+        {
+            if(argv[1] == NULL)
+                return EXIT_FAILURE;
+            if(pipi_command(ctx, "scale", argv[1]) != 0)
+                return EXIT_FAILURE;
+            argv++;
+        }
         else if(!strcmp(argv[0], "--geometry"))
         {
             if(argv[1] == NULL)