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/*
* Copyright (c) 1993-1995 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and the Network Research Group at
* Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#) $Header: /cs/research/mice/starship/src/local/CVS_repository/vic/renderer-window.h,v 1.1.1.1 1998/02/18 18:03:42 ucacsva Exp $ (LBL)
*/
#ifndef vic_renderer_window_h
#define vic_renderer_window_h
#include "renderer.h"
class VideoWindow;
class VideoImage;
/*
* A subclass of Renderer where video is sent to a display window.
*/
class WindowRenderer : public BlockRenderer {
protected:
WindowRenderer(VideoWindow* w, int decimation);
public:
~WindowRenderer();
void push(const u_char* frm, int miny, int maxy,
int minx, int maxx) const;
void sync() const;
void resize(int w, int h);
protected:
/*XXX*/
void dither_null(const u_char* frm, u_int off, u_int x,
u_int width, u_int height) const;
virtual void setcolor(int c);
void compute_scale(int w, int h);
virtual void alloc_image() = 0;
void doupdate();
virtual void update() = 0;
virtual void disable() = 0;
int index() const;
VideoWindow* window_;
VideoImage* image_;
int ww_; /* width of target window */
int wh_; /* height of target window */
int scale_; /* log base two of inverse of scale factor */
int outw_; /* width of target image (maybe != width_) */
int outh_; /* height of target image (maybe != height_) */
int color_; /* false to render grayscale */
int decimation_; /* 422 or 411 */
};
inline int WindowRenderer::index() const
{
int s = scale_ + 1;
if (s > 4)
s = 4;
else if (s <= 0)
/*XXX never upsample by more than 2*/
s = 0;
s <<= 2;
if (decimation_ == 422)
s |= 1;
if (!color_)
s |= 2;
return (s);
}
/*
* A subclass of WindowRenderer where video is dithered (or colorspace
* converted) locally.
*/
class WindowDitherer : public WindowRenderer {
protected:
WindowDitherer(VideoWindow*, int decimation);
void alloc_image();
u_char* pixbuf_;
};
#endif
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