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-rw-r--r--src/trace/imagemap-gdk.cpp185
1 files changed, 185 insertions, 0 deletions
diff --git a/src/trace/imagemap-gdk.cpp b/src/trace/imagemap-gdk.cpp
new file mode 100644
index 0000000..10fe27e
--- /dev/null
+++ b/src/trace/imagemap-gdk.cpp
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#include <cstdlib>
+
+#include "imagemap-gdk.h"
+
+
+/*#########################################################################
+## G R A Y M A P
+#########################################################################*/
+
+GrayMap *gdkPixbufToGrayMap(GdkPixbuf *buf)
+{
+ if (!buf)
+ return nullptr;
+
+ int width = gdk_pixbuf_get_width(buf);
+ int height = gdk_pixbuf_get_height(buf);
+ guchar *pixdata = gdk_pixbuf_get_pixels(buf);
+ int rowstride = gdk_pixbuf_get_rowstride(buf);
+ int n_channels = gdk_pixbuf_get_n_channels(buf);
+
+ GrayMap *grayMap = GrayMapCreate(width, height);
+ if (!grayMap)
+ return nullptr;
+
+ //### Fill in the odd cells with RGB values
+ int x,y;
+ int row = 0;
+ for (y=0 ; y<height ; y++)
+ {
+ guchar *p = pixdata + row;
+ for (x=0 ; x<width ; x++)
+ {
+ int alpha = (int)p[3];
+ int white = 3 * (255-alpha);
+ unsigned long sample = (int)p[0] + (int)p[1] +(int)p[2];
+ unsigned long bright = sample * alpha / 256 + white;
+ grayMap->setPixel(grayMap, x, y, bright);
+ p += n_channels;
+ }
+ row += rowstride;
+ }
+
+ return grayMap;
+}
+
+GdkPixbuf *grayMapToGdkPixbuf(GrayMap *grayMap)
+{
+ if (!grayMap)
+ return nullptr;
+
+ guchar *pixdata = (guchar *)
+ malloc(sizeof(guchar) * grayMap->width * grayMap->height * 3);
+ if (!pixdata)
+ {
+ g_warning("grayMapToGdkPixbuf: can not allocate memory for conversion.");
+ return nullptr;
+ }
+
+ int n_channels = 3;
+ int rowstride = grayMap->width * 3;
+
+ GdkPixbuf *buf = gdk_pixbuf_new_from_data(pixdata, GDK_COLORSPACE_RGB,
+ 0, 8, grayMap->width, grayMap->height,
+ rowstride, (GdkPixbufDestroyNotify)g_free, nullptr);
+
+ //### Fill in the odd cells with RGB values
+ int x,y;
+ int row = 0;
+ for (y=0 ; y<grayMap->height ; y++)
+ {
+ guchar *p = pixdata + row;
+ for (x=0 ; x<grayMap->width ; x++)
+ {
+ unsigned long pix = grayMap->getPixel(grayMap, x, y) / 3;
+ p[0] = p[1] = p[2] = (guchar)(pix & 0xff);
+ p += n_channels;
+ }
+ row += rowstride;
+ }
+
+ return buf;
+}
+
+
+/*#########################################################################
+## R G B M A P
+#########################################################################*/
+
+RgbMap *gdkPixbufToRgbMap(GdkPixbuf *buf)
+{
+ if (!buf)
+ return nullptr;
+
+ int width = gdk_pixbuf_get_width(buf);
+ int height = gdk_pixbuf_get_height(buf);
+ guchar *pixdata = gdk_pixbuf_get_pixels(buf);
+ int rowstride = gdk_pixbuf_get_rowstride(buf);
+ int n_channels = gdk_pixbuf_get_n_channels(buf);
+
+ RgbMap *rgbMap = RgbMapCreate(width, height);
+ if (!rgbMap)
+ return nullptr;
+
+ //### Fill in the cells with RGB values
+ int x,y;
+ int row = 0;
+ for (y=0 ; y<height ; y++)
+ {
+ guchar *p = pixdata + row;
+ for (x=0 ; x<width ; x++)
+ {
+ int alpha = (int)p[3];
+ int white = 255 - alpha;
+ int r = (int)p[0]; r = r * alpha / 256 + white;
+ int g = (int)p[1]; g = g * alpha / 256 + white;
+ int b = (int)p[2]; b = b * alpha / 256 + white;
+
+ rgbMap->setPixel(rgbMap, x, y, r, g, b);
+ p += n_channels;
+ }
+ row += rowstride;
+ }
+
+ return rgbMap;
+}
+
+
+
+/*#########################################################################
+## I N D E X E D M A P
+#########################################################################*/
+
+
+GdkPixbuf *indexedMapToGdkPixbuf(IndexedMap *iMap)
+{
+ if (!iMap)
+ return nullptr;
+
+ guchar *pixdata = (guchar *)
+ malloc(sizeof(guchar) * iMap->width * iMap->height * 3);
+ if (!pixdata)
+ {
+ g_warning("indexedMapToGdkPixbuf: can not allocate memory for conversion.");
+ return nullptr;
+ }
+
+ int n_channels = 3;
+ int rowstride = iMap->width * 3;
+
+ GdkPixbuf *buf = gdk_pixbuf_new_from_data(pixdata, GDK_COLORSPACE_RGB,
+ 0, 8, iMap->width, iMap->height,
+ rowstride, (GdkPixbufDestroyNotify)g_free, nullptr);
+
+ //### Fill in the cells with RGB values
+ int x,y;
+ int row = 0;
+ for (y=0 ; y<iMap->height ; y++)
+ {
+ guchar *p = pixdata + row;
+ for (x=0 ; x<iMap->width ; x++)
+ {
+ RGB rgb = iMap->getPixelValue(iMap, x, y);
+ p[0] = rgb.r & 0xff;
+ p[1] = rgb.g & 0xff;
+ p[2] = rgb.b & 0xff;
+ p += n_channels;
+ }
+ row += rowstride;
+ }
+
+ return buf;
+}
+
+/*#########################################################################
+## E N D O F F I L E
+#########################################################################*/