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/*
Copyright (C) 2004 Free Software Foundation, Inc.
Author: Alexander Malmberg <alexander@malmberg.org>
This file is part of GNUstep.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; see the file COPYING.LIB.
If not, see <http://www.gnu.org/licenses/> or write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "ARTGState.h"
#ifndef RDS
#include "x11/XWindowBuffer.h"
#endif
#include "blit.h"
#include <math.h>
#include <Foundation/NSData.h>
#include <Foundation/NSDictionary.h>
#include <Foundation/NSValue.h>
#include <AppKit/NSAffineTransform.h>
#include <AppKit/NSGraphics.h>
@implementation ARTGState (ReadRect)
-(NSDictionary *) GSReadRect: (NSRect)r
{
NSMutableDictionary *md = [[NSMutableDictionary alloc] init];
NSAffineTransform *matrix;
int x0, y0, x1, y1, w, h, ox, oy;
NSPoint p;
/* Get the bounding rect in pixel coordinates. */
p = r.origin;
p = [ctm transformPoint: p];
x0 = floor(p.x); x1 = ceil(p.x);
y0 = floor(p.y); y1 = ceil(p.y);
#define CHECK do { \
if (floor(p.x)<x0) x0=floor(p.x); \
if (floor(p.y)<y0) y0=floor(p.y); \
if (ceil(p.x)>x1) x1=ceil(p.x); \
if (ceil(p.y)>y1) y1=ceil(p.y); } while (0)
p = r.origin; p.x += r.size.width;
p = [ctm transformPoint: p];
CHECK;
p = r.origin; p.x += r.size.width; p.y += r.size.height;
p = [ctm transformPoint: p];
CHECK;
p = r.origin; p.y += r.size.height;
p = [ctm transformPoint: p];
CHECK;
#undef CHECK
/* Clip to the window. */
if (x0 < 0) x0 = 0;
if (x1 < 0) x1 = 0;
if (x0 > wi->sx) x0 = wi->sx;
if (x1 > wi->sx) x1 = wi->sx;
if (y0 < 0) y0 = 0;
if (y1 < 0) y1 = 0;
if (y0 > wi->sy) y0 = wi->sy;
if (y1 > wi->sy) y1 = wi->sy;
w = x1 - x0;
h = y1 - y0;
if (w <= 0 || h <= 0)
w = h = 0;
/* The matrix is the transform from user space to image space, and image
space has its origin in the lower left corner if the image. Thus, we need
to translate the ctm according to the position of the lower left corner
in the window. */
matrix=[ctm copy];
[matrix translateXBy: -x0 yBy: -y0];
ox = [matrix transformPoint: NSMakePoint(0, 0)].x - offset.x;
oy = offset.y - [matrix transformPoint: NSMakePoint(0, 0)].y;
[md setObject: NSDeviceRGBColorSpace forKey: @"ColorSpace"];
[md setObject: [NSNumber numberWithUnsignedInt: 1] forKey: @"HasAlpha"];
[md setObject: [NSNumber numberWithUnsignedInt: 8] forKey: @"BitsPerSample"];
[md setObject: [NSNumber numberWithUnsignedInt: 4] forKey: @"SamplesPerPixel"];
[md setObject: [NSValue valueWithSize: NSMakeSize(w, h)] forKey: @"Size"];
[md setObject: matrix forKey: @"Matrix"];
[matrix release];
if (!w || !h)
return [[md autorelease] makeImmutableCopyOnFail: YES];
/* The rectangle isn't degenerate, so we need to actually copy some data. */
{
NSMutableData *d;
int y;
composite_run_t c;
d = [[NSMutableData alloc] initWithLength: w * h * 4];
c.dst = [d mutableBytes];
c.src = wi->data + (oy - y1) * wi->bytes_per_line + (x0 + ox) * DI.bytes_per_pixel;
c.srca = wi->alpha + (oy - y1) * wi->sx + (x0 + ox);
for (y = 0; y < h; y++)
{
if (wi->has_alpha)
DI.read_pixels_a(&c, w);
else
DI.read_pixels_o(&c, w);
c.src += wi->bytes_per_line;
c.srca += wi->sx;
c.dst += w * 4;
}
[md setObject: [[d autorelease] makeImmutableCopyOnFail: YES] forKey: @"Data"];
}
return [[md autorelease] makeImmutableCopyOnFail: YES];
}
@end
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