pointer: custom pointer shape support

Make the revised 'vbox_pointer' component the new 'pointer' component.

Fixes #2585

repos/os/include/pointer/dither_painter.h

@@ -0,0 +1,75 @@
+/*
+ * \brief  Functor for converting pixel formats by applying dithering
+ * \author Norman Feske
+ * \date   2014-09-10
+ */
+
+/*
+ * Copyright (C) 2014-2017 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#ifndef _DITHER_PAINTER_H_
+#define _DITHER_PAINTER_H_
+
+#include <util/dither_matrix.h>
+#include <os/surface.h>
+
+
+struct Dither_painter
+{
+	/*
+	 * Surface and texture must have the same size
+	 */
+	template <typename DST_PT, typename SRC_PT>
+	static inline void paint(Genode::Surface<DST_PT>       &surface,
+	                         Genode::Texture<SRC_PT> const &texture)
+	{
+		if (surface.size() != texture.size()) return;
+
+		Genode::Surface_base::Rect const clipped = surface.clip();
+
+		if (!clipped.valid()) return;
+
+		unsigned const offset = surface.size().w()*clipped.y1() + clipped.x1();
+
+		DST_PT              *dst,       *dst_line       = surface.addr()  + offset;
+		SRC_PT        const *src_pixel, *src_pixel_line = texture.pixel() + offset;
+		unsigned char const *src_alpha, *src_alpha_line = texture.alpha() + offset;
+
+		unsigned const line_len = surface.size().w();
+
+		for (int y = clipped.y1(), h = clipped.h() ; h--; y++) {
+
+			src_pixel = src_pixel_line;
+			src_alpha = src_alpha_line;
+			dst       = dst_line;
+
+			for (int x = clipped.x1(), w = clipped.w(); w--; x++) {
+
+				int const v = Genode::Dither_matrix::value(x, y) >> 4;
+
+				SRC_PT        const pixel = *src_pixel++;
+				unsigned char const alpha = *src_alpha++;
+
+				int const r = pixel.r() - v;
+				int const g = pixel.g() - v;
+				int const b = pixel.b() - v;
+				int const a = alpha ? (int)alpha - v : 0;
+
+				using Genode::min;
+				using Genode::max;
+
+				*dst++ = DST_PT(max(0, r), max(0, g), max(0, b), max(0, a));
+			}
+
+			src_pixel_line += line_len;
+			src_alpha_line += line_len;
+			dst_line       += line_len;
+		}
+	}
+};
+
+#endif /* _DITHER_PAINTER_H_ */

repos/os/include/pointer/shape_report.h

@@ -0,0 +1,38 @@
+/*
+ * \brief  shape report
+ * \author Christian Prochaska
+ * \date   2015-03-20
+ */
+
+/*
+ * Copyright (C) 2015-2017 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#ifndef _INCLUDE__POINTER__SHAPE_REPORT_H_
+#define _INCLUDE__POINTER__SHAPE_REPORT_H_
+
+namespace Pointer {
+
+	enum {
+		MAX_WIDTH = 100,
+		MAX_HEIGHT = 100,
+		MAX_SHAPE_SIZE = MAX_WIDTH*MAX_HEIGHT*4
+	};
+
+	struct Shape_report;
+}
+
+struct Pointer::Shape_report
+{
+	bool          visible;
+	unsigned int  x_hot;
+	unsigned int  y_hot;
+	unsigned int  width;
+	unsigned int  height;
+	unsigned char shape[MAX_SHAPE_SIZE];
+};
+
+#endif /* _INCLUDE__POINTER__SHAPE_REPORT_H_ */