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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 Computer Systems
* Engineering 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.
*/
static const char rcsid[] =
"@(#) $Header: /cs/research/mice/starship/src/local/CVS_repository/vic/renderer-window.cc,v 1.1.1.1 1998/02/18 18:03:42 ucacsva Exp $ (LBL)";
#include <stdlib.h>
#include "vw.h"
#include "renderer-window.h"
#include "color.h"
WindowRenderer::WindowRenderer(VideoWindow* w, int decimation) :
BlockRenderer(decimation == 422 ? FT_YUV_422 : FT_YUV_411),
window_(w),
image_(0),
ww_(w->width()),
wh_(w->height()),
scale_(0),
outw_(0),
outh_(0),
color_(0),
decimation_(decimation)
{
}
WindowRenderer::~WindowRenderer()
{
/*
* Clear out the image so that the VideoWindow class does
* not try to use it before another window gets attached
* and replaces the image.
*/
window_->setimage(0);
delete image_;
}
static inline int
distance(int a, int b)
{
a -= b;
return (a >= 0 ? a : -a);
}
void WindowRenderer::compute_scale(int w, int h)
{
width_ = w;
height_ = h;
framesize_ = w * h;
/*
* Choose a good scale factor. We scale up or down
* by factors of two. Find the closest scale so that
* the input geometry matches to the desired window size.
* On a mismatch, the image will be centered in the window.
*/
scale_ = 0;
int d = distance(ww_, width_);
int t = distance(ww_, width_ << 1);
if (t < d) {
outw_ = width_ << 1;
outh_ = height_ << 1;
scale_ = -1;
} else {
/*XXX this should be a loop */
t = distance(ww_, width_ >> 1);
if (t < d) {
d = t;
scale_ = 1;
}
t = distance(ww_, width_ >> 2);
if (t < d) {
d = t;
scale_ = 2;
}
t = distance(ww_, width_ >> 3);
if (t < d)
scale_ = 3;
outw_ = width_ >> scale_;
outh_ = height_ >> scale_;
}
}
void WindowRenderer::sync() const
{
window_->complete();
}
void WindowRenderer::push(const u_char*, int miny, int maxy, int minx, int maxx) const
{
if (scale_ >= 0) {
miny >>= scale_;
maxy >>= scale_;
minx >>= scale_;
maxx >>= scale_;
} else {
miny <<= -scale_;
maxy <<= -scale_;
minx <<= -scale_;
maxx <<= -scale_;
}
window_->render(image_, miny, maxy, minx, maxx);
}
/*
* Tell subclass that we've change decimation/color state
* so it can reconfigure with different rendering parameters.
*/
void WindowRenderer::doupdate()
{
/*
* Subclasses assume that output width is a multiple of 4.
* If not, disable the renderer. (This is a pathological
* case that should only happen with garbage streams.
* In theory, it could happen with non-standard video sources
* like X screen captures; XXX deal with this when things break.)
*/
if (outw_ & 3)
disable();
else
update();
}
void WindowRenderer::resize(int w, int h)
{
int outw = outw_;
int outh = outh_;
compute_scale(w, h);
/*
* Doing a resize can change the output window size
* (but it's not likely because this size is mainly
* dependent on the size of the window).
*/
if (outw != outw_ || outh != outh_) {
delete image_;
window_->setimage(0);
alloc_image();
/*XXX*/
window_->damage();
window_->redraw();
}
doupdate();
}
void WindowRenderer::setcolor(int c)
{
color_ = c;
doupdate();
}
void WindowRenderer::dither_null(const u_char*, u_int, u_int,
u_int, u_int) const
{
}
WindowDitherer::WindowDitherer(VideoWindow* vw, int decimation)
: WindowRenderer(vw, decimation)
{
}
void WindowDitherer::alloc_image()
{
StandardVideoImage* p;
p = StandardVideoImage::allocate(window_->tkwin(), outw_, outh_);
pixbuf_ = p->pixbuf();
image_ = p;
}
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