Finish rebranding of Krita as Chalk

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/koffice@1238363 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 106 insertions, 0 deletions

diff --git a/chalk/core/kis_alpha_mask.h b/chalk/core/kis_alpha_mask.h
new file mode 100644
index 00000000..4665857e
--- /dev/null
+++ b/chalk/core/kis_alpha_mask.h
@@ -0,0 +1,106 @@
+/*
+ *  Copyright (c) 2004 Boudewijn Rempt <[email protected]>
+ *
+ *  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.
+ */
+#ifndef KIS_ALPHA_MASK_
+#define KIS_ALPHA_MASK_
+
+#include <tqimage.h>
+#include <tqvaluevector.h>
+
+#include <ksharedptr.h>
+
+#include "kis_global.h"
+#include "kis_types.h"
+
+/**
+ * KisAlphaMask is intended to create alpha values from a TQImage for use
+ * in brush creation. It is not a generic alpha tqmask that can be used with
+ * KisPaintDevices: use a KisSelection for that.
+ */
+class KisAlphaMask : public KShared {
+    
+ public:
+    /**
+       Create an alpha tqmask based on the specified TQImage. If the image is
+       not a grayscale, the tqmask value is calculated from the effective grey
+       level and alpha value.
+    */
+    KisAlphaMask(const TQImage& img);
+
+    /**
+       As above except quicker as the image does not need to be scanned
+       to see if it has any colour pixels.
+    */
+    KisAlphaMask(const TQImage& img, bool hasColor);
+
+    /**
+       Create a transparent tqmask.
+    */
+    KisAlphaMask(TQ_INT32 width, TQ_INT32 height);
+
+    virtual ~KisAlphaMask();
+
+    /**
+       @return the number of alpha values in a scanline.
+    */
+    TQ_INT32 height() const;
+
+    /**
+       @return the number of lines in the tqmask.
+     */
+       TQ_INT32 width() const;
+
+    /**
+       @return the alpha value at the specified position.
+
+       Returns TQ_UINT8 OPACITY_TRANSPARENT if the value is
+       outside the bounds of the tqmask.
+
+       XXX: this is, of course, not the best way of tqmasking.
+       Better would be to let KisAlphaMask fill a chunk of memory
+       with the alpha values at the right position, something like
+       void applyMask(TQ_UINT8 *pixeldata, TQ_INT32 pixelWidth,
+       TQ_INT32 alphaPos). That would be fastest, or we could
+       provide an iterator over the tqmask, that would be nice, too.
+    */
+    inline TQ_UINT8 alphaAt(TQ_INT32 x, TQ_INT32 y) const
+    {
+	if (y >= 0 && y < m_height && x >= 0 && x < m_width) {
+	    return m_data[(y * m_width) + x];
+	}
+	else {
+	    return OPACITY_TRANSPARENT;
+	}
+    }
+
+    void setAlphaAt(TQ_INT32 x, TQ_INT32 y, TQ_UINT8 alpha);
+
+    // Create a new tqmask by interpolating between tqmask1 and tqmask2 as t
+    // goes from 0 to 1.
+    static KisAlphaMaskSP interpolate(KisAlphaMaskSP tqmask1, KisAlphaMaskSP tqmask2, double t);
+
+private:
+    void computeAlpha(const TQImage& img);
+    void copyAlpha(const TQImage& img);
+
+    TQValueVector<TQ_UINT8> m_data;
+    TQ_INT32 m_width;
+    TQ_INT32 m_height;
+};
+
+#endif // KIS_ALPHA_MASK_
+