# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1528287580 -10800
# Node ID 77a4d8fab5cccf6923aa443790e00fa9e6d0aa3e
# Parent  8f47bd264458261d37d4d593ccd532f38e23b287
Add output buffer cropping to dmFinishRLEBuffers() and the flags and fields to DMGrowBuf.

diff -r 8f47bd264458 -r 77a4d8fab5cc tools/lib64gfx.c
--- a/tools/lib64gfx.c	Wed Jun 06 15:18:25 2018 +0300
+++ b/tools/lib64gfx.c	Wed Jun 06 15:19:40 2018 +0300
@@ -350,6 +350,22 @@
         memmove(dst->data, dst->data + dst->offs, dst->len);
         dst->offs = 0;
     }
+
+    switch (cfg->flags & DM_OUT_CROP_MASK)
+    {
+        case DM_OUT_CROP_END:
+            if (cfg->cropOutLen < dst->len)
+            {
+                memmove(dst->data, dst->data + dst->len - cfg->cropOutLen + 1, cfg->cropOutLen);
+                dst->len = cfg->cropOutLen;
+            }
+            break;
+
+        case DM_OUT_CROP_START:
+            if (cfg->cropOutLen <= dst->len)
+                dst->len = cfg->cropOutLen;
+            break;
+    }
 }
 
 
diff -r 8f47bd264458 -r 77a4d8fab5cc tools/lib64gfx.h
--- a/tools/lib64gfx.h	Wed Jun 06 15:18:25 2018 +0300
+++ b/tools/lib64gfx.h	Wed Jun 06 15:19:40 2018 +0300
@@ -232,6 +232,11 @@
 
     DM_RLE_BACKWARDS_INPUT  = 0x0100,
     DM_RLE_BACKWARDS_OUTPUT = 0x0200,
+
+    DM_OUT_CROP_NONE        = 0x0000,
+    DM_OUT_CROP_START       = 0x1000,
+    DM_OUT_CROP_END         = 0x2000,
+    DM_OUT_CROP_MASK        = 0xf000,
 };
 
 
@@ -240,6 +245,8 @@
     char *func;
     int type;
     int flags;
+    size_t cropOutLen;
+
     Uint8
         // DM_COMP_RLE_MARKER mode
         rleMarkerB,          // Marker byte for byte length runs (if DM_RLE_BYTE_RUNS used)