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| | /* Image support for the NeXT/Open/GNUstep and macOS window system.
Copyright (C) 1989, 1992-1994, 2005-2006, 2008-2016 Free Software
Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
/*
Originally by Carl Edman
Updated by Christian Limpach (chris@nice.ch)
OpenStep/Rhapsody port by Scott Bender (sbender@harmony-ds.com)
macOS/Aqua port by Christophe de Dinechin (descubes@earthlink.net)
GNUstep port and post-20 update by Adrian Robert (arobert@cogsci.ucsd.edu)
*/
/* This should be the first include, as it may set up #defines affecting
interpretation of even the system includes. */
#include <config.h>
#include "lisp.h"
#include "dispextern.h"
#include "nsterm.h"
#include "frame.h"
#include "coding.h"
/* ==========================================================================
C interface. This allows easy calling from C files. We could just
compile everything as Objective-C, but that might mean slower
compilation and possible difficulties on some platforms..
========================================================================== */
void *
ns_image_from_XBM (char *bits, int width, int height,
unsigned long fg, unsigned long bg)
{
NSTRACE ("ns_image_from_XBM");
return [[EmacsImage alloc] initFromXBM: (unsigned char *) bits
width: width height: height
fg: fg bg: bg];
}
void *
ns_image_for_XPM (int width, int height, int depth)
{
NSTRACE ("ns_image_for_XPM");
return [[EmacsImage alloc] initForXPMWithDepth: depth
width: width height: height];
}
void *
ns_image_from_file (Lisp_Object file)
{
NSTRACE ("ns_image_from_file");
return [EmacsImage allocInitFromFile: file];
}
bool
ns_load_image (struct frame *f, struct image *img,
Lisp_Object spec_file, Lisp_Object spec_data)
{
EmacsImage *eImg = nil;
NSSize size;
NSTRACE ("ns_load_image");
if (STRINGP (spec_file))
{
eImg = [EmacsImage allocInitFromFile: spec_file];
}
else if (STRINGP (spec_data))
{
NSData *data;
data = [NSData dataWithBytes: SSDATA (spec_data)
length: SBYTES (spec_data)];
eImg = [[EmacsImage alloc] initWithData: data];
[eImg setPixmapData];
}
if (eImg == nil)
{
add_to_log ("Unable to load image %s", img->spec);
return 0;
}
size = [eImg size];
img->width = size.width;
img->height = size.height;
/* 4) set img->pixmap = emacsimage */
img->pixmap = eImg;
return 1;
}
int
ns_image_width (void *img)
{
return [(id)img size].width;
}
int
ns_image_height (void *img)
{
return [(id)img size].height;
}
unsigned long
ns_get_pixel (void *img, int x, int y)
{
return [(EmacsImage *)img getPixelAtX: x Y: y];
}
void
ns_put_pixel (void *img, int x, int y, unsigned long argb)
{
unsigned char alpha = (argb >> 24) & 0xFF;
if (alpha == 0)
alpha = 0xFF;
[(EmacsImage *)img setPixelAtX: x Y: y toRed: (argb >> 16) & 0xFF
green: (argb >> 8) & 0xFF blue: (argb & 0xFF) alpha: alpha];
}
void
ns_set_alpha (void *img, int x, int y, unsigned char a)
{
[(EmacsImage *)img setAlphaAtX: x Y: y to: a];
}
/* ==========================================================================
Class supporting bitmaps and images of various sorts.
========================================================================== */
@implementation EmacsImage
+ allocInitFromFile: (Lisp_Object)file
{
NSImageRep *imgRep;
Lisp_Object found;
EmacsImage *image;
/* Search bitmap-file-path for the file, if appropriate. */
found = x_find_image_file (file);
if (!STRINGP (found))
return nil;
found = ENCODE_FILE (found);
image = [[EmacsImage alloc] initByReferencingFile:
[NSString stringWithUTF8String: SSDATA (found)]];
image->bmRep = nil;
#ifdef NS_IMPL_COCOA
imgRep = [NSBitmapImageRep imageRepWithData:[image TIFFRepresentation]];
#else
imgRep = [image bestRepresentationForDevice: nil];
#endif
if (imgRep == nil)
{
[image release];
return nil;
}
/* The next two lines cause the DPI of the image to be ignored.
This seems to be the behavior users expect. */
#ifdef NS_IMPL_COCOA
#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
[image setScalesWhenResized: YES];
#endif
#endif
[image setSize: NSMakeSize([imgRep pixelsWide], [imgRep pixelsHigh])];
[image setName: [NSString stringWithUTF8String: SSDATA (file)]];
return image;
}
- (void)dealloc
{
[stippleMask release];
[bmRep release];
[super dealloc];
}
/* Create image from monochrome bitmap. If both FG and BG are 0
(black), set the background to white and make it transparent. */
- initFromXBM: (unsigned char *)bits width: (int)w height: (int)h
fg: (unsigned long)fg bg: (unsigned long)bg
{
unsigned char *planes[5];
unsigned char bg_alpha = 0xff;
[self initWithSize: NSMakeSize (w, h)];
bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL
pixelsWide: w pixelsHigh: h
bitsPerSample: 8 samplesPerPixel: 4
hasAlpha: YES isPlanar: YES
colorSpaceName: NSCalibratedRGBColorSpace
bytesPerRow: w bitsPerPixel: 0];
[bmRep getBitmapDataPlanes: planes];
if (fg == 0 && bg == 0)
{
bg = 0xffffff;
bg_alpha = 0;
}
{
/* pull bits out to set the (bytewise) alpha mask */
int i, j, k;
unsigned char *s = bits;
unsigned char *rr = planes[0];
unsigned char *gg = planes[1];
unsigned char *bb = planes[2];
unsigned char *alpha = planes[3];
unsigned char fgr = (fg >> 16) & 0xff;
unsigned char fgg = (fg >> 8) & 0xff;
unsigned char fgb = fg & 0xff;
unsigned char bgr = (bg >> 16) & 0xff;
unsigned char bgg = (bg >> 8) & 0xff;
unsigned char bgb = bg & 0xff;
unsigned char c;
int idx = 0;
for (j = 0; j < h; ++j)
for (i = 0; i < w; )
{
c = *s++;
for (k = 0; i < w && k < 8; ++k, ++i)
{
if (c & 0x80)
{
*rr++ = fgr;
*gg++ = fgg;
*bb++ = fgb;
*alpha++ = 0xff;
}
else
{
*rr++ = bgr;
*gg++ = bgg;
*bb++ = bgb;
*alpha++ = bg_alpha;
}
idx++;
c <<= 1;
}
}
}
xbm_fg = fg;
[self addRepresentation: bmRep];
return self;
}
/* Set color for a bitmap image. */
- setXBMColor: (NSColor *)color
{
NSSize s = [self size];
unsigned char *planes[5];
EmacsCGFloat r, g, b, a;
NSColor *rgbColor;
if (bmRep == nil || color == nil)
return self;
if ([color colorSpaceName] != NSCalibratedRGBColorSpace)
rgbColor = [color colorUsingColorSpaceName: NSCalibratedRGBColorSpace];
else
rgbColor = color;
[rgbColor getRed: &r green: &g blue: &b alpha: &a];
[bmRep getBitmapDataPlanes: planes];
{
int i, len = s.width*s.height;
int rr = r * 0xff, gg = g * 0xff, bb = b * 0xff;
unsigned char fgr = (xbm_fg >> 16) & 0xff;
unsigned char fgg = (xbm_fg >> 8) & 0xff;
unsigned char fgb = xbm_fg & 0xff;
for (i = 0; i < len; ++i)
if (planes[0][i] == fgr && planes[1][i] == fgg && planes[2][i] == fgb)
{
planes[0][i] = rr;
planes[1][i] = gg;
planes[2][i] = bb;
}
xbm_fg = ((rr << 16) & 0xff) + ((gg << 8) & 0xff) + (bb & 0xff);
}
return self;
}
- initForXPMWithDepth: (int)depth width: (int)width height: (int)height
{
NSSize s = {width, height};
int i;
[self initWithSize: s];
bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL
pixelsWide: width pixelsHigh: height
/* keep things simple for now */
bitsPerSample: 8 samplesPerPixel: 4 /*RGB+A*/
hasAlpha: YES isPlanar: YES
colorSpaceName: NSCalibratedRGBColorSpace
bytesPerRow: width bitsPerPixel: 0];
[bmRep getBitmapDataPlanes: pixmapData];
for (i =0; i<4; i++)
memset (pixmapData[i], 0, width*height);
[self addRepresentation: bmRep];
return self;
}
/* attempt to pull out pixmap data from a BitmapImageRep; returns NO if fails */
- (void) setPixmapData
{
NSEnumerator *reps;
NSImageRep *rep;
reps = [[self representations] objectEnumerator];
while ((rep = (NSImageRep *) [reps nextObject]))
{
if ([rep respondsToSelector: @selector (getBitmapDataPlanes:)])
{
NSBitmapImageRep *bmr = (NSBitmapImageRep *) rep;
if ([bmr numberOfPlanes] >= 3)
[bmr getBitmapDataPlanes: pixmapData];
/* The next two lines cause the DPI of the image to be ignored.
This seems to be the behavior users expect. */
#ifdef NS_IMPL_COCOA
#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_6
[self setScalesWhenResized: YES];
#endif
#endif
[self setSize: NSMakeSize([bmr pixelsWide], [bmr pixelsHigh])];
break;
}
}
}
/* note; this and next work only for image created with initForXPMWithDepth,
initFromSkipXBM, or where setPixmapData was called successfully */
/* return ARGB */
- (unsigned long) getPixelAtX: (int)x Y: (int)y
{
if (bmRep == nil)
return 0;
/* this method is faster but won't work for bitmaps */
if (pixmapData[0] != NULL)
{
int loc = x + y * [self size].width;
return (pixmapData[3][loc] << 24) /* alpha */
| (pixmapData[0][loc] << 16) | (pixmapData[1][loc] << 8)
| (pixmapData[2][loc]);
}
else
{
NSColor *color = [bmRep colorAtX: x y: y];
EmacsCGFloat r, g, b, a;
[color getRed: &r green: &g blue: &b alpha: &a];
return ((int)(a * 255.0) << 24)
| ((int)(r * 255.0) << 16) | ((int)(g * 255.0) << 8)
| ((int)(b * 255.0));
}
}
- (void) setPixelAtX: (int)x Y: (int)y toRed: (unsigned char)r
green: (unsigned char)g blue: (unsigned char)b
alpha:(unsigned char)a;
{
if (bmRep == nil)
return;
if (pixmapData[0] != NULL)
{
int loc = x + y * [self size].width;
pixmapData[0][loc] = r;
pixmapData[1][loc] = g;
pixmapData[2][loc] = b;
pixmapData[3][loc] = a;
}
else
{
[bmRep setColor:
[NSColor colorWithCalibratedRed: (r/255.0) green: (g/255.0)
blue: (b/255.0) alpha: (a/255.0)]
atX: x y: y];
}
}
- (void) setAlphaAtX: (int) x Y: (int) y to: (unsigned char) a
{
if (bmRep == nil)
return;
if (pixmapData[0] != NULL)
{
int loc = x + y * [self size].width;
pixmapData[3][loc] = a;
}
else
{
NSColor *color = [bmRep colorAtX: x y: y];
color = [color colorWithAlphaComponent: (a / 255.0)];
[bmRep setColor: color atX: x y: y];
}
}
/* returns a pattern color, which is cached here */
- (NSColor *)stippleMask
{
if (stippleMask == nil)
stippleMask = [[NSColor colorWithPatternImage: self] retain];
return stippleMask;
}
@end
|