1 files changed, 92 insertions, 0 deletions
diff --git a/chalk/colorspaces/wet/kis_texture_painter.cpp b/chalk/colorspaces/wet/kis_texture_painter.cpp
new file mode 100644
index 000000000..9300e808b
--- /dev/null
+++ b/chalk/colorspaces/wet/kis_texture_painter.cpp
@@ -0,0 +1,92 @@
+/*
+ *  Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
+ *
+ *  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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include <math.h>
+
+#include <kdebug.h>
+
+#include <kis_global.h>
+#include <kis_image.h>
+#include <kis_iterators_pixel.h>
+#include <kis_layer.h>
+#include <kis_paint_device.h>
+#include <kis_painter.h>
+#include <kis_types.h>
+
+#include "kis_wet_colorspace.h"
+#include "kis_texture_painter.h"
+
+KisTexturePainter::KisTexturePainter()
+    : super()
+{
+    // XXX make at least one of these configurable, probably blurh
+    m_height = 1;
+    m_blurh = 0.7;
+}
+
+KisTexturePainter::KisTexturePainter(KisPaintDeviceSP device) : super(device)
+{
+    m_height = 1;
+    m_blurh = 0.7;
+}
+
+void KisTexturePainter::createTexture( TQ_INT32 x,  TQ_INT32 y,  TQ_INT32 w,  TQ_INT32 h)
+{
+    double hscale = 128 * m_height / RAND_MAX;
+
+    int ibh = (int) floor(256 * m_blurh + 0.5);
+
+    // initialize with random data
+    for (int y2 = 0; y2 < h; y2++) {
+        KisHLineIterator i = m_device->createHLineIterator(x, y + y2, w, true);
+        while (!i.isDone()) {
+            WetPack* pack = reinterpret_cast<WetPack*>(i.rawData());
+            WetPix* w = &(pack->adsorb);
+            w->h = ( TQ_UINT16)floor(128 + hscale * rand());
+            ++i;
+        }
+    }
+
+    int lh;
+
+    // Blur horizontally
+    for (int y2 = 0; y2 < h; y2++) {
+        KisHLineIterator i = m_device->createHLineIterator(x, y + y2, w, true);
+
+        WetPack* pack = reinterpret_cast<WetPack*>(i.rawData());
+        WetPix* w = &(pack->adsorb);
+        lh = w->h;
+        ++i;
+
+        while (!i.isDone()) {
+            pack = reinterpret_cast<WetPack*>(i.rawData());
+            w = &(pack->adsorb);
+            w->h += ((lh - w->h) * ibh + 128) >> 8;
+            lh = w->h;
+            // XXX to make it easier for us later on, we store the height data in paint
+            // as well!
+            w = &(pack->paint);
+            w->h = lh;
+            ++i;
+        }
+    }
+
+    // Vertical blurring was commented out in wetdreams, the effect seems to be achievable
+    // without this.
+    // I think this is because with blur in one direction, you get more the effect of
+    // having 'fibers' in your paper
+}