1 files changed, 138 insertions, 0 deletions
diff --git a/src/imgbuf.cc b/src/imgbuf.cc
new file mode 100644
index 00000000..51f86b74
--- /dev/null
+++ b/src/imgbuf.cc
@@ -0,0 +1,138 @@
+/*
+ * File: imgbuf.cc
+ *
+ * Copyright (C) 2008 Jorge Arellano Cid <jcid@dillo.org>,
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
+#include "msg.h"
+#include "imgbuf.hh"
+#include "dw/core.hh"
+#include "dw/image.hh"
+
+using namespace dw::core;
+
+/*
+ * Local data
+ */
+static size_t linebuf_size = 0;
+static uchar_t *linebuf = NULL;
+
+
+/*
+ * Decode 'buf' (an image line) into RGB format.
+ */
+static uchar_t *Imgbuf_rgb_line(const uchar_t *buf,
+                                DilloImgType type, uchar_t *cmap,
+                                uint_t width, uint_t y)
+{
+   uint_t x;
+
+   switch (type) {
+   case DILLO_IMG_TYPE_INDEXED:
+      if (cmap) {
+         for (x = 0; x < width; x++)
+            memcpy(linebuf + x * 3, cmap + buf[x] * 3, 3);
+      } else {
+         MSG_WARN("Gif:: image lacks a color map\n");
+      }
+      break;
+   case DILLO_IMG_TYPE_GRAY:
+      for (x = 0; x < width; x++)
+         memset(linebuf + x * 3, buf[x], 3);
+      break;
+   case DILLO_IMG_TYPE_CMYK_INV:
+      /*
+       * We treat CMYK as if it were "RGBW", and it works. Everyone who is
+       * trying to handle CMYK jpegs is confused by this, and supposedly
+       * the issue is that Adobe CMYK is "wrong" but ubiquitous.
+       */
+      for (x = 0; x < width; x++) {
+         uint_t white = buf[x * 4 + 3];
+         linebuf[x * 3] = buf[x * 4] * white / 0x100;
+         linebuf[x * 3 + 1] = buf[x * 4 + 1] * white / 0x100;
+         linebuf[x * 3 + 2] = buf[x * 4 + 2] * white / 0x100;
+      }
+      break;
+   case DILLO_IMG_TYPE_RGB:
+      /* avoid a memcpy here!  --Jcid */
+      return (uchar_t *)buf;
+   case DILLO_IMG_TYPE_NOTSET:
+      MSG_ERR("Imgbuf_rgb_line: type not set...\n");
+      break;
+   }
+   return linebuf;
+}
+
+// Wrappers for Imgbuf -------------------------------------------------------
+
+/*
+ * Increment reference count for an Imgbuf
+ */
+void a_Imgbuf_ref(void *v_imgbuf)
+{
+   ((Imgbuf*)v_imgbuf)->ref();
+}
+
+/*
+ * Decrement reference count for an Imgbuf
+ */
+void a_Imgbuf_unref(void *v_imgbuf)
+{
+   if (v_imgbuf)
+      ((Imgbuf*)v_imgbuf)->unref();
+}
+
+/*
+ * Create a new Imgbuf
+ */
+void *a_Imgbuf_new(void *v_dw, int img_type, uint_t width, uint_t height)
+{
+   Layout *layout = ((Widget*)v_dw)->getLayout();
+   if (!layout) {
+      MSG_ERR("a_Imgbuf_new: layout is NULL.\n");
+      exit(1);
+   }
+   // Assert linebuf is wide enough.
+   if (3 * width > linebuf_size) {
+      linebuf_size = 3 * width;
+      linebuf = (uchar_t*) dRealloc(linebuf, linebuf_size);
+   }
+
+   return (void*)layout->createImgbuf(Imgbuf::RGB, width, height);
+}
+
+/*
+ * Last reference for this Imgbuf?
+ */
+int a_Imgbuf_last_reference(void *v_imgbuf)
+{
+   return ((Imgbuf*)v_imgbuf)->lastReference () ? 1 : 0;
+}
+
+/*
+ * Update the root buffer of an imgbuf.
+ */
+void a_Imgbuf_update(void *v_imgbuf, const uchar_t *buf, DilloImgType type,
+                     uchar_t *cmap, uint_t width, uint_t height, uint_t y)
+
+{
+   dReturn_if_fail ( y < height );
+
+   /* Decode 'buf' and copy it into the imgbuf */
+   uchar_t *newbuf = Imgbuf_rgb_line(buf, type, cmap, width, y);
+   ((Imgbuf*)v_imgbuf)->copyRow(y, (byte *)newbuf);
+}
+
+/*
+ * Reset for a new scan from a multiple-scan image.
+ */
+void a_Imgbuf_new_scan(void *v_imgbuf)
+{
+   ((Imgbuf*)v_imgbuf)->newScan();
+}
+