Mercurial > hg > dmlib

changeset 1720:77a4d8fab5cc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add output buffer cropping to dmFinishRLEBuffers() and the flags and fields to DMGrowBuf.
author Matti Hamalainen <ccr@tnsp.org>
date Wed, 06 Jun 2018 15:19:40 +0300
parents 8f47bd264458
children c9a6f1dae756
files tools/lib64gfx.c tools/lib64gfx.h
diffstat 2 files changed, 23 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- 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;
+    }
 }
 
 
--- 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)