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dispbtmp.c
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C/C++ Source or Header
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1991-06-21
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7KB
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213 lines
#ifndef lint
static char SccsId[] = "%W% %G%";
#endif
/* Module: dispbtmp.c (Display Bitmap)
* Purpose: Routines to map 16 bit data to a single plane bitmap
* Subroutine: init_halftone() returns: void
* Subroutine: select_halftone() returns: void
* Subroutine: make_halftone_panimage() returns: void
* Subroutine: make_halftone_display() returns: void
* Xlib calls: none
* Copyright: 1987, 1988, 1989 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
* Modified: {0} Michael VanHilst initial version 31 December 1987
* {1} MVH signed scalemap, some new names 3 December 1988
* {2} MVH new color structure for use with X11 10 May 1989
* {3} MVH update on partial display buffer 24 November 1989
* {4} MVH changed calls for replcate zoom 21 June 1991
* {n} <who> -- <does what> -- <when>
*/
#include <stdio.h> /* stderr, FILE, NULL, etc. */
#include <X11/Xlib.h> /* X window stuff */
#include <X11/Xutil.h> /* X window manager stuff */
#include "hfiles/constant.h" /* define codes */
#include "hfiles/define.h" /* MIN, MAX and more */
#include "hfiles/struct.h" /* all struct record types */
#include "hfiles/extern.h" /* major declared structs */
#include "hfiles/scale.h" /* scaling parameters & struct */
#include "defs/dither.def" /* halftoning tool buffers */
/*
* Subroutine: init_halftone
* Purpose: Initialize color struct pointers for halftoning
*/
void init_halftone ()
{
color.halftone.errbuf = &errbuf[0];
switch( color.halftone.matrixID ) {
case BOP_Matrix2:
color.halftone.matrix = &dotmatrix2[0][0];
break;
case BOP_Matrix1:
default:
color.halftone.matrix = &dotmatrix1[0][0];
break;
}
}
/*
* Subroutine: select_halftone
* Purpose: Respond to halftone selection command
*/
void select_halftone ()
{
static void new_halftone();
switch( control.response[1] ) {
case 0:
/*0 is main menu selection, change only main mode */
control.mode = BOP;
break;
case BOP_Invert:
/* invert is a toggle, switch cursor colors, redraw disp and pan boxes */
color.halftone.inverse = !color.halftone.inverse;
new_halftone(1);
break;
case BOP_Diffuse:
if( color.halftone.mode != BOP_Diffuse ) {
color.halftone.mode = BOP_Diffuse;
new_halftone(0);
}
break;
case BOP_Matrix1:
if( (color.halftone.mode != BOP_Dither) ||
(color.halftone.matrix != &dotmatrix1[0][0]) ) {
color.halftone.mode = BOP_Dither;
color.halftone.matrixID = BOP_Matrix1;
color.halftone.matrix = &dotmatrix1[0][0];
new_halftone(1);
}
break;
case BOP_Matrix2:
if( (color.halftone.mode != BOP_Dither) ||
(color.halftone.matrix != &dotmatrix2[0][0]) ) {
color.halftone.mode = BOP_Dither;
color.halftone.matrixID = BOP_Matrix2;
color.halftone.matrix = &dotmatrix2[0][0];
new_halftone(1);
}
break;
}
}
/*
* Subroutine: new_halftone
* Purpose: Redo halftone images of both dispbox and panbox
*/
static void new_halftone ( magnifier )
int magnifier; /* i: include-magnifier */
{
void make_halftone_display(), disp_dispbox(), disp_panbox(), draw_colorbar();
void set_magnifier_matrix(), panimage_halftone(), map_halftone_colorbar();
map_halftone_colorbar( 1, 0 );
if( magnifier )
set_magnifier_matrix(color.halftone.matrix, color.halftone.inverse);
make_halftone_display();
disp_dispbox();
panimage_halftone();
disp_panbox();
draw_colorbar(0);
}
/*
* Subroutine: make_halftone_panimage
* Purpose: Make halftone bitmap for pan window (panbox)
*/
void panimage_halftone ( )
{
void dither_sample(), diffuse_sample();
bzero(panbox.image.data, panbox.image.bytes_per_line * panbox.yheight);
if( color.halftone.mode == BOP_Dither ) {
dither_sample(buffer.panbuf, panbox.xwidth, 1,
(unsigned char *)panbox.image.data,
panbox.image.bytes_per_line,
0, 0, panbox.xwidth, panbox.yheight,
buffer.scalemap + SCALEOFF, color.halftone.matrix,
color.halftone.inverse);
} else if( color.halftone.mode == BOP_Diffuse ) {
diffuse_sample(buffer.panbuf, panbox.xwidth, 1,
(unsigned char *)panbox.image.data,
panbox.image.bytes_per_line,
0, 0, panbox.xwidth, panbox.yheight,
buffer.scalemap + SCALEOFF, color.halftone.errbuf,
color.halftone.inverse);
}
}
/*
* Subroutine: make_halftone_display
* Purpose: Make halftone bitmap for display window (dispbox)
*/
void make_halftone_display ( )
{
short *shortimage;
void diffuse_sample(), diffuse_replicate();
void dither_sample(), dither_replicate();
/* point to where the image begins in the image BUFFER */
shortimage = buffer.shortbuf +
(coord.bd.srcY1 * coord.buf.width) + coord.bd.srcX1;
/* zero out display buffer for lines to draw (will | with existing bits) */
if( coord.bd.clip )
/* if leaving space due to panning/zooming, zero everything */
bzero(dispbox.image.data, dispbox.image.bytes_per_line * dispbox.yheight);
else
bzero(dispbox.image.data + (coord.bd.dstY1 * dispbox.image.bytes_per_line),
coord.bd.dstYhght * dispbox.image.bytes_per_line);
/* halftone black and white images */
if( coord.bd.block < 0 ) {
int xrep1, yrep1;
if( coord.bd.dst_x < 0 )
xrep1 = coord.bd.dst_x + ((coord.bd.src_x + 1) * (-coord.bd.block));
else
xrep1 = -coord.bd.block;
if( coord.bd.dst_y < 0 )
yrep1 = coord.bd.dst_y + ((coord.bd.src_y + 1) * (-coord.bd.block));
else
yrep1 = -coord.bd.block;
if( color.halftone.mode == BOP_Diffuse ) {
diffuse_replicate(shortimage, coord.buf.width, -coord.bd.block,
(unsigned char *)dispbox.image.data,
dispbox.image.bytes_per_line, xrep1, yrep1,
coord.bd.dstX1, coord.bd.dstY1,
coord.bd.dstXwdth-1, coord.bd.dstYhght-1,
buffer.scalemap + SCALEOFF, color.halftone.errbuf,
color.halftone.inverse);
} else {
dither_replicate(shortimage, coord.buf.width, -coord.bd.block,
(unsigned char *)dispbox.image.data,
dispbox.image.bytes_per_line, xrep1, yrep1,
coord.bd.dstX1, coord.bd.dstY1,
coord.bd.dstXwdth-1, coord.bd.dstYhght-1,
buffer.scalemap + SCALEOFF, color.halftone.matrix,
color.halftone.inverse);
}
} else {
if( color.halftone.mode == BOP_Diffuse ) {
diffuse_sample(shortimage, coord.buf.width, coord.bd.block,
(unsigned char *)dispbox.image.data,
dispbox.image.bytes_per_line,
coord.bd.dstX1, coord.bd.dstY1,
coord.bd.dstXwdth, coord.bd.dstYhght,
buffer.scalemap + SCALEOFF, color.halftone.errbuf,
color.halftone.inverse);
} else {
dither_sample(shortimage, coord.buf.width, coord.bd.block,
(unsigned char *)dispbox.image.data,
dispbox.image.bytes_per_line,
coord.bd.dstX1, coord.bd.dstY1,
coord.bd.dstXwdth, coord.bd.dstYhght,
buffer.scalemap + SCALEOFF, color.halftone.matrix,
color.halftone.inverse);
}
}
}