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libs-back/Source/art/ARTContext.m
Alexander Malmberg 496e7e4a6e Rename ARTWindowBuffer to XWindowBuffer and move it to x11/. 
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/trunk@14426 72102866-910b-0410-8b05-ffd578937521
2002-09-10 19:37:47 +00:00

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Objective-C
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/*
Copyright (C) 2002 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 Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <math.h>
#include <AppKit/NSAffineTransform.h>
#include <AppKit/NSBezierPath.h>
#include <AppKit/NSColor.h>
#include "ARTGState.h"
#include "x11/XWindowBuffer.h"
#include "blit.h"
#include "ftfont.h"
#ifndef PI
#define PI 3.14159265358979323846264338327950288
#endif
/*
** subclassResponsibility **
Note that these aren't actually subclassResponsibility anymore; instead
of crashing, they just print a warning.
- (void) dissolveGState: (GSGState *)source
fromRect: (NSRect)aRect
toPoint: (NSPoint)aPoint
delta: (float)delta
- (void) DPSashow: (float)x : (float)y : (const char*)s
- (void) DPSawidthshow: (float)cx : (float)cy : (int)c : (float)ax : (float)ay
- (void) DPSwidthshow: (float)x : (float)y : (int)c : (const char*)s
DPSxshow, DPSyshow, DPSxyshow
** Other unimplemented stuff **
FontInfo:
-(void) set
Context:
- (NSColor *) NSReadPixel: (NSPoint) location
*/
/* Portions based on gnustep-back code, eg.: */
/* GSGState - Generic graphic state
Copyright (C) 1998 Free Software Foundation, Inc.
Written by: Adam Fedor <fedor@gnu.org>
Date: Mar 2002
This file is part of the GNU Objective C User Interface Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
*/
draw_info_t ART_DI;
@implementation ARTGState
/* TODO:
optimize all this. passing device_color_t structures around by value is
very expensive
*/
-(void) setColor: (device_color_t *)color state: (color_state_t)cState
{
device_color_t c;
unsigned char r,g,b;
[super setColor: color state: cState];
if (cState&(COLOR_FILL|COLOR_STROKE))
{
c=fillColor;
gsColorToRGB(&c); /* TODO: check this */
if (c.field[0]>1.0) c.field[0]=1.0;
if (c.field[0]<0.0) c.field[0]=0.0;
r=c.field[0]*255;
if (c.field[1]>1.0) c.field[1]=1.0;
if (c.field[1]<0.0) c.field[1]=0.0;
g=c.field[1]*255;
if (c.field[2]>1.0) c.field[2]=1.0;
if (c.field[2]<0.0) c.field[2]=0.0;
b=c.field[2]*255;
if (cState&COLOR_FILL)
{
fill_color[0]=r;
fill_color[1]=g;
fill_color[2]=b;
fill_color[3]=fillColor.field[AINDEX]*255;
}
if (cState&COLOR_STROKE)
{
stroke_color[0]=r;
stroke_color[1]=g;
stroke_color[2]=b;
stroke_color[3]=strokeColor.field[AINDEX]*255;
}
}
}
/* specially optimized versions (since these are common and simple) */
-(void) DPSsetgray: (float)gray
{
if (gray < 0.0) gray = 0.0;
if (gray > 1.0) gray = 1.0;
fillColor.space = strokeColor.space = gray_colorspace;
fillColor.field[0] = strokeColor.field[0] = gray;
cstate = COLOR_FILL | COLOR_STROKE;
stroke_color[0] = stroke_color[1] = stroke_color[2] =
fill_color[0] = fill_color[1] = fill_color[2] = gray * 255;
}
-(void) DPSsetalpha: (float)a
{
if (a < 0.0) a = 0.0;
if (a > 1.0) a = 1.0;
fillColor.field[AINDEX] = strokeColor.field[AINDEX] = a;
stroke_color[3] = fill_color[3] = a * 255;
}
- (void) DPSsetrgbcolor: (float)r : (float)g : (float)b
{
if (r < 0.0) r = 0.0; if (r > 1.0) r = 1.0;
if (g < 0.0) g = 0.0; if (g > 1.0) g = 1.0;
if (b < 0.0) b = 0.0; if (b > 1.0) b = 1.0;
fillColor.space = strokeColor.space = rgb_colorspace;
fillColor.field[0] = strokeColor.field[0] = r;
fillColor.field[1] = strokeColor.field[1] = g;
fillColor.field[2] = strokeColor.field[2] = b;
cstate = COLOR_FILL | COLOR_STROKE;
stroke_color[0] = fill_color[0] = r * 255;
stroke_color[1] = fill_color[1] = g * 255;
stroke_color[2] = fill_color[2] = b * 255;
}
/* ----------------------------------------------------------------------- */
/* Text operations */
/* ----------------------------------------------------------------------- */
- (void) DPSashow: (float)x : (float)y : (const char*)s
{ /* TODO: adds (x,y) in user space to each glyph's x/y advancement */
NSLog(@"ignoring DPSashow: %g : %g : '%s'",x,y,s);
}
- (void) DPSawidthshow: (float)cx : (float)cy : (int)c : (float)ax : (float)ay
: (const char*)s
{ /* TODO: add (ax,ay) in user space to each glyph's x/y advancement and
additionally add (cx,cy) to the character c's advancement */
NSLog(@"ignoring DPSawidthshow: %g : %g : %i : %g : %g : '%s'",
cx,cy,c,ax,ay,s);
}
- (void) DPScharpath: (const char*)s : (int)b
{ /* TODO: handle b? will freetype ever give us a stroke-only font? */
NSPoint p;
if ([path isEmpty]) return;
p=[self currentPoint];
[(id<FTFontInfo>)[font fontInfo]
outlineString: s
at: p.x:p.y
gstate: self];
[self DPSclosepath];
}
- (void) DPSshow: (const char*)s
{
NSPoint p;
int x,y;
if (!wi || !wi->data) return;
if (all_clipped)
return;
if ([path isEmpty]) return;
p=[path currentPoint];
x=p.x;
y=wi->sy-p.y;
[(id<FTFontInfo>)[font fontInfo]
drawString: s
at: x:y
to: clip_x0:clip_y0:clip_x1:clip_y1:CLIP_DATA:wi->bytes_per_line
color: fill_color[0]:fill_color[1]:fill_color[2]:fill_color[3]
transform: ctm
drawinfo: &DI];
}
- (void) DPSwidthshow: (float)x : (float)y : (int)c : (const char*)s
{ /* TODO: add (x,y) user-space to the character c's advancement */
NSLog(@"ignoring DPSwidthshow: %g : %g : %i : '%s'",x,y,c,s);
}
- (void) DPSxshow: (const char*)s : (const float*)numarray : (int)size
{
NSPoint p;
int x,y;
if (!wi || !wi->data) return;
if (all_clipped)
return;
if ([path isEmpty]) return;
p=[path currentPoint];
x=p.x;
y=wi->sy-p.y;
[(id<FTFontInfo>)[font fontInfo]
drawString: s
at: x:y
to: clip_x0:clip_y0:clip_x1:clip_y1:CLIP_DATA:wi->bytes_per_line
color: fill_color[0]:fill_color[1]:fill_color[2]:fill_color[3]
transform: ctm
deltas: numarray : size : 1];
}
- (void) DPSxyshow: (const char*)s : (const float*)numarray : (int)size
{
NSPoint p;
int x,y;
if (!wi || !wi->data) return;
if (all_clipped)
return;
if ([path isEmpty]) return;
p=[path currentPoint];
x=p.x;
y=wi->sy-p.y;
[(id<FTFontInfo>)[font fontInfo]
drawString: s
at: x:y
to: clip_x0:clip_y0:clip_x1:clip_y1:CLIP_DATA:wi->bytes_per_line
color: fill_color[0]:fill_color[1]:fill_color[2]:fill_color[3]
transform: ctm
deltas: numarray : size : 3];
}
- (void) DPSyshow: (const char*)s : (const float*)numarray : (int)size
{
NSPoint p;
int x,y;
if (!wi || !wi->data) return;
if (all_clipped)
return;
if ([path isEmpty]) return;
p=[path currentPoint];
x=p.x;
y=wi->sy-p.y;
[(id<FTFontInfo>)[font fontInfo]
drawString: s
at: x:y
to: clip_x0:clip_y0:clip_x1:clip_y1:CLIP_DATA:wi->bytes_per_line
color: fill_color[0]:fill_color[1]:fill_color[2]:fill_color[3]
transform: ctm
deltas: numarray : size : 2];
}
/* ----------------------------------------------------------------------- */
/* Gstate operations */
/* ----------------------------------------------------------------------- */
- (void) DPSinitgraphics
{
[super DPSinitgraphics];
line_width=1.0;
linecapstyle=ART_PATH_STROKE_CAP_BUTT;
linejoinstyle=ART_PATH_STROKE_JOIN_MITER;
miter_limit=10.0;
if (dash.n_dash)
{
free(dash.dash);
dash.dash=NULL;
dash.n_dash=0;
do_dash=0;
}
}
- (void) DPScurrentlinecap: (int*)linecap
{
switch (linecapstyle)
{
default:
case ART_PATH_STROKE_CAP_BUTT:
*linecap=NSButtLineCapStyle;
break;
case ART_PATH_STROKE_CAP_ROUND:
*linecap=NSRoundLineCapStyle;
break;
case ART_PATH_STROKE_CAP_SQUARE:
*linecap=NSSquareLineCapStyle;
break;
}
}
- (void) DPScurrentlinejoin: (int*)linejoin
{
switch (linejoinstyle)
{
default:
case ART_PATH_STROKE_JOIN_MITER:
*linejoin=NSMiterLineJoinStyle;
break;
case ART_PATH_STROKE_JOIN_ROUND:
*linejoin=NSRoundLineJoinStyle;
break;
case ART_PATH_STROKE_JOIN_BEVEL:
*linejoin=NSBevelLineJoinStyle;
break;
}
}
- (void) DPScurrentlinewidth: (float*)width
{
*width=line_width;
}
- (void) DPScurrentmiterlimit: (float*)limit
{
*limit=miter_limit;
}
- (void) DPScurrentstrokeadjust: (int*)b
{
/* TODO We never stroke-adjust, see DPSsetstrokeadjust. */
*b=0;
}
- (void) DPSsetdash: (const float*)pat : (int)size : (float)offs
{
int i;
if (dash.n_dash)
{
free(dash.dash);
dash.dash=NULL;
dash.n_dash=0;
do_dash=0;
}
if (size>0)
{
dash.offset=offs;
dash.n_dash=size;
dash.dash=malloc(sizeof(double)*size);
if (!dash.dash)
{
/* Revert to no dash. Better than crashing. */
dash.n_dash=0;
dash.offset=0;
do_dash=0;
}
else
{
for (i=0;i<size;i++)
dash.dash[i]=pat[i];
do_dash=1;
}
}
}
- (void) DPSsetlinecap: (int)linecap
{
switch (linecap)
{
default:
case NSButtLineCapStyle:
linecapstyle=ART_PATH_STROKE_CAP_BUTT;
break;
case NSRoundLineCapStyle:
linecapstyle=ART_PATH_STROKE_CAP_ROUND;
break;
case NSSquareLineCapStyle:
linecapstyle=ART_PATH_STROKE_CAP_SQUARE;
break;
}
}
- (void) DPSsetlinejoin: (int)linejoin
{
switch (linejoin)
{
default:
case NSMiterLineJoinStyle:
linejoinstyle=ART_PATH_STROKE_JOIN_MITER;
break;
case NSRoundLineJoinStyle:
linejoinstyle=ART_PATH_STROKE_JOIN_ROUND;
break;
case NSBevelLineJoinStyle:
linejoinstyle=ART_PATH_STROKE_JOIN_BEVEL;
break;
}
}
- (void) DPSsetlinewidth: (float)width
{
line_width=width;
/* TODO? handle line_width=0 properly */
if (line_width<=0) line_width=1;
}
- (void) DPSsetmiterlimit: (float)limit
{
miter_limit=limit;
}
- (void) DPSsetstrokeadjust: (int)b
{
/* Since we anti-alias stroke-adjustment isn't really applicable.
TODO:
However, it might be useful to handle stroke-adjusting by snapping
to whole pixels when rendering to avoid anti-aliasing of rectangles
and straight lines. */
}
@end
@interface ARTGState (internal_stuff)
-(void) _setup_stuff: (gswindow_device_t *)win : (int)x : (int)y;
-(void) GSCurrentDevice: (void **)device : (int *)x : (int *)y;
@end
@implementation ARTGState (internal_stuff)
- (void) dealloc
{
if (dash.dash)
free(dash.dash);
if (clip_span)
free(clip_span);
if (clip_index)
free(clip_index);
DESTROY(wi);
[super dealloc];
}
-(id) deepen
{
[super deepen];
if (dash.dash)
{
double *tmp=malloc(sizeof(double)*dash.n_dash);
if (tmp)
{
memcpy(tmp,dash.dash,sizeof(double)*dash.n_dash);
dash.dash=tmp;
}
else
{
dash.dash=NULL;
dash.n_dash=0;
do_dash=0;
}
}
if (clip_span)
{
unsigned int *n;
n=malloc(sizeof(unsigned int)*clip_num_span);
if (n)
{
memcpy(n,clip_span,sizeof(unsigned int)*clip_num_span);
clip_span=n;
n=malloc(sizeof(unsigned int *)*(clip_sy+1));
if (n)
{
memcpy(n,clip_index,sizeof(unsigned int *)*(clip_sy+1));
clip_index = n;
}
else
{
free(clip_span);
clip_span=clip_index=NULL;
clip_num_span=0;
}
}
else
{
clip_span=clip_index=NULL;
clip_num_span=0;
}
}
wi=RETAIN(wi);
return self;
}
-(void) _setup_stuff: (gswindow_device_t *)window : (int)x : (int)y
{
struct XWindowBuffer_depth_info_s di;
XWindowBuffer *new_wi;
[self setOffset: NSMakePoint(x, y)];
di.drawing_depth = DI.drawing_depth;
di.bytes_per_pixel = DI.bytes_per_pixel;
di.inline_alpha = DI.inline_alpha;
di.inline_alpha_ofs = DI.inline_alpha_ofs;
new_wi=[XWindowBuffer windowBufferForWindow: window depthInfo: &di];
if (new_wi != wi)
{
DESTROY(wi);
wi=new_wi;
}
else
{
DESTROY(new_wi);
}
}
-(void) GSCurrentDevice: (void **)device : (int *)x : (int *)y
{
if (x)
*x = 0;
if (y)
*y = 0;
if (device)
{
if (wi)
*device = wi->window;
else
*device = NULL;
}
}
@end
@implementation ARTContext
+ (void)initializeBackend
{
NSLog(@"Initializing libart/freetype backend");
[NSGraphicsContext setDefaultContextClass: [ARTContext class]];
[FTFontInfo initializeBackend];
}
- (id) initWithContextInfo: (NSDictionary *)info
{
NSString *contextType;
contextType = [info objectForKey:
NSGraphicsContextRepresentationFormatAttributeName];
self = [super initWithContextInfo: info];
if (contextType)
{
/* Most likely this is a PS or PDF context, so just return what
super gave us */
return self;
}
/* Create a default gstate */
gstate = [[ARTGState allocWithZone: [self zone]] initWithDrawContext: self];
[gstate DPSsetalpha: 1.0];
[gstate DPSsetlinewidth: 1.0];
{
Display *d=[(XGServer *)server xDisplay];
Visual *v=DefaultVisual(d,DefaultScreen(d));
int bpp=DefaultDepth(d,DefaultScreen(d));
XImage *i=XCreateImage(d,v,bpp,ZPixmap,0,NULL,8,8,8,0);
bpp=i->bits_per_pixel;
XDestroyImage(i);
artcontext_setup_draw_info(&DI,v->red_mask,v->green_mask,v->blue_mask,bpp);
}
return self;
}
- (void) flushGraphics
{ /* TODO: _really_ flush? (ie. force updates and wait for shm completion?) */
XFlush([(XGServer *)server xDisplay]);
}
+(void) waitAllContexts
{
}
+(void) _gotShmCompletion: (Drawable)d
{
[XWindowBuffer _gotShmCompletion: d];
}
-(void) gotShmCompletion: (Drawable)d
{
[XWindowBuffer _gotShmCompletion: d];
}
//
// Read the Color at a Screen Position
//
- (NSColor *) NSReadPixel: (NSPoint) location
{
NSLog(@"ignoring NSReadPixel: (%g %g)",location.x,location.y);
return nil;
}
- (void) beep
{
XBell([(XGServer *)server xDisplay], 50);
}
/* Private backend methods */
+(void) handleExposeRect: (NSRect)rect forDriver: (void *)driver
{
[(XWindowBuffer *)driver _exposeRect: rect];
}
@end
@implementation ARTContext (ops)
- (void) GSSetDevice: (void*)device : (int)x : (int)y
{
[(ARTGState *)gstate _setup_stuff: device : x : y];
}
-(void) GSCurrentDevice: (void **)device : (int *)x : (int *)y
{
[(ARTGState *)gstate GSCurrentDevice: device : x : y];
}
@end
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