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# ivaria/gradient.h

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    00001 /*
    00002     Copyright (C) 2003 by Jorrit Tyberghein
    00003               (C) 2003 by Frank Richter
    00004               (C) 2006 by Christopher Nelson
    00005
    00006     This library is free software; you can redistribute it and/or
    00007     modify it under the terms of the GNU Library General Public
    00008     License as published by the Free Software Foundation; either
    00009     version 2 of the License, or (at your option) any later version.
    00010
    00011     This library is distributed in the hope that it will be useful,
    00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00014     Library General Public License for more details.
    00015
    00016     You should have received a copy of the GNU Library General Public
    00017     License along with this library; if not, write to the Free
    00018     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00019 */
    00020
    00021 #ifndef __CS_IVARIA_GRADIENT_H__
    00022 #define __CS_IVARIA_GRADIENT_H__
    00023
    00028 #include "iutil/array.h"
    00029
    00030 #include "csutil/cscolor.h"
    00031 #include "csgfx/rgbpixel.h"
    00032
    00036 struct csGradientShade
    00037 {
    00039   csColor4 left;
    00041   csColor4 right;
    00043   float position;
    00044
    00046   csGradientShade () : left (0, 0, 0, 1.0f), right (0, 0, 0, 1.0f),
    00047     position (0) {}
    00048
    00050   csGradientShade (const csColor4& left_color, const csColor4& right_color,
    00051     float pos)  : left (left_color), right (right_color), position (pos) {}
    00053   explicit csGradientShade (const csColor& left_color,
    00054     const csColor& right_color, float pos) : left (left_color),
    00055     right (right_color), position (pos) {}
    00056
    00061   csGradientShade (const csColor4& color, float pos) : left (color),
    00062     right (color), position (pos) {}
    00067   explicit csGradientShade (const csColor& color, float pos) :
    00068     left (color), right (color), position (pos) {}
    00069
    00070   bool operator== (const csGradientShade& other)
    00071   {
    00072     return (left == other.left) && (right == other.right)
    00073       && (position == other.position);
    00074   }
    00075 };
    00076
    00080 struct iGradientShades : public iArrayReadOnly<csGradientShade>
    00081 {
    00082   SCF_IARRAYREADONLY_INTERFACE(iGradientShades);
    00083 };
    00084
    00127 struct iGradient : public virtual iBase
    00128 {
    00129   SCF_INTERFACE(iGradient, 0, 0, 1);
    00130
    00132
    00133   virtual void AddShade (const csGradientShade& shade) = 0;
    00134   virtual void AddShade (const csColor4& color, float position) = 0;
    00135   virtual void AddShade (const csColor4& left, const csColor4& right,
    00136     float position) = 0;
    00138
    00140   virtual void Clear () = 0;
    00141
    00158   virtual bool Render (csRGBcolor* pal, size_t count, float begin = 0.0f,
    00159     float end = 1.0f) const = 0;
    00160
    00177   virtual bool Render (csRGBpixel* pal, size_t count, float begin = 0.0f,
    00178     float end = 1.0f) const = 0;
    00179
    00181   virtual csPtr<iGradientShades> GetShades () = 0;
    00182 };
    00183
    00184
    00185 #endif // __CS_IVARIA_GRADIENT_H__