--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file surface.h
+** \brief Surface and Pen Definitions
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**
+** This package 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 package 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.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __SYNFIG_SURFACE_H
+#define __SYNFIG_SURFACE_H
+
+/* === H E A D E R S ======================================================= */
+
+#include "color.h"
+#include "renddesc.h"
+#include <ETL/pen>
+#include <ETL/surface>
+#include <ETL/handle>
+
+/* === M A C R O S ========================================================= */
+
+/* === T Y P E D E F S ===================================================== */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+namespace synfig {
+
+class Target;
+class Target_Scanline;
+
+class ColorPrep
+{
+public:
+ ColorAccumulator cook(Color x)const
+ {
+ x.set_r(x.get_r()*x.get_a());
+ x.set_g(x.get_g()*x.get_a());
+ x.set_b(x.get_b()*x.get_a());
+ return x;
+ }
+ Color uncook(ColorAccumulator x)const
+ {
+ if(!x.get_a())
+ return Color::alpha();
+
+ const float a(1.0f/x.get_a());
+
+ x.set_r(x.get_r()*a);
+ x.set_g(x.get_g()*a);
+ x.set_b(x.get_b()*a);
+ return x;
+ }
+};
+
+/*! \class Surface
+** \brief Bitmap Surface
+** \todo writeme
+*/
+class Surface : public etl::surface<Color, ColorAccumulator, ColorPrep>
+{
+public:
+ typedef Color value_type;
+ class alpha_pen;
+
+ Surface() { }
+
+ Surface(const size_type::value_type &w, const size_type::value_type &h):
+ etl::surface<Color, ColorAccumulator,ColorPrep>(w,h) { }
+
+ Surface(const size_type &s):
+ etl::surface<Color, ColorAccumulator,ColorPrep>(s) { }
+
+ template <typename _pen>
+ Surface(const _pen &_begin, const _pen &_end):
+ etl::surface<Color, ColorAccumulator,ColorPrep>(_begin,_end) { }
+
+ template <class _pen> void blit_to(_pen &pen)
+ { return blit_to(pen,0,0, get_w(),get_h()); }
+
+ template <class _pen> void
+ blit_to(_pen& DEST_PEN, int x, int y, int w, int h)
+ {
+ etl::surface<Color, ColorAccumulator, ColorPrep>::blit_to(DEST_PEN,x,y,w,h);
+ }
+
+ void clear();
+
+ void blit_to(alpha_pen& DEST_PEN, int x, int y, int w, int h);
+}; // END of class Surface
+
+#ifndef DOXYGEN_SKIP
+
+/*! \internal Used by Pen_Alpha */
+struct _BlendFunc
+{
+ Color::BlendMethod blend_method;
+
+ _BlendFunc(Color::BlendMethod b= Color::BLEND_COMPOSITE):blend_method(b) { }
+
+ Color operator()(const Color &a,const Color &b,const Color::value_type &t)const
+ {
+ return Color::blend(b,a,t,blend_method);
+ }
+}; // END of class _BlendFunc
+
+#endif
+
+/*! \class Surface::alpha_pen
+** \brief Alpha-Blending Pen
+**
+** This pen works like a normal alpha pen, except that it supports
+** a variety of blending methods. Use set_blend_method() to select
+** which blending method you want to use.
+** The default blending method is Color::BLEND_COMPOSITE.
+** \see Color::BlendMethod
+*/
+class Surface::alpha_pen : public etl::alpha_pen< etl::generic_pen<Color, ColorAccumulator>, Color::value_type, _BlendFunc >
+{
+public:
+ alpha_pen() { }
+ alpha_pen(const etl::alpha_pen< etl::generic_pen<Color, ColorAccumulator>, Color::value_type, _BlendFunc > &x):
+ etl::alpha_pen< etl::generic_pen<Color, ColorAccumulator>, Color::value_type, _BlendFunc >(x)
+ { }
+
+ alpha_pen(const etl::generic_pen<Color, ColorAccumulator>& pen, const Color::value_type &a = 1, const _BlendFunc &func = _BlendFunc()):
+ etl::alpha_pen< etl::generic_pen<Color, ColorAccumulator>, Color::value_type, _BlendFunc >(pen,a,func)
+ { }
+
+ //! Sets the blend method to that described by \a method
+ void set_blend_method(Color::BlendMethod method) { affine_func_.blend_method=method; }
+
+ //! Returns the blend method being used for this pen
+ Color::BlendMethod get_blend_method()const { return affine_func_.blend_method; }
+}; // END of class Surface::alpha_pen
+
+//! Creates a target that will render to \a surface
+etl::handle<Target_Scanline> surface_target(Surface *surface);
+
+}; // END of namespace synfig
+
+/* === E N D =============================================================== */
+
+#endif
projects / synfig.git / blobdiff