Changeset 2709 for libpipi/trunk/pipiTweet

Timestamp:

Aug 13, 2008, 10:26:18 PM (15 years ago)

Author:

Sam Hocevar

Message:

• context.c: add the "swap" command to swap two images in the stack.

File:

• libpipi/trunk/pipi/context.c (modified) (8 diffs)

libpipi/trunk/pipi/context.c

@@ -63 +63 @@
         va_list ap;
 
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         ctx->nimages--;
@@ -78 +78 @@
         va_list ap;
 
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         va_start(ap, cmd);
@@ -120 +120 @@
         va_list ap;
 
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         va_start(ap, cmd);
@@ -209 +209 @@
     else if(!strcmp(cmd, "wrap"))
     {
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         ctx->images[ctx->nimages - 1]->wrap = 1;
@@ -216 +216 @@
     {
         pipi_image_t *tmp;
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         tmp = ctx->images[ctx->nimages - 1];
@@ -224 +224 @@
     else if(!strcmp(cmd, "gray"))
     {
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         pipi_getpixels(ctx->images[ctx->nimages - 1], PIPI_PIXELS_Y_F);
@@ -230 +230 @@
     else if(!strcmp(cmd, "free"))
     {
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         ctx->nimages--;
@@ -237 +237 @@
     else if(!strcmp(cmd, "dup"))
     {
-        if(ctx->nimages <= 0)
+        if(ctx->nimages < 1)
             return -1;
         ctx->images[ctx->nimages] = pipi_copy(ctx->images[ctx->nimages - 1]);
         ctx->nimages++;
     }
+    else if(!strcmp(cmd, "swap"))
+    {
+        pipi_image_t *tmp;
+        if(ctx->nimages < 2)
+            return -1;
+        tmp = ctx->images[ctx->nimages - 1];
+        ctx->images[ctx->nimages - 1] = ctx->images[ctx->nimages - 2];
+        ctx->images[ctx->nimages - 2] = tmp;
+    }
     else
     {