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image.c
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C/C++ Source or Header
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1991-08-03
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12KB
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336 lines
#ifndef lint
static char SccsId[] = "%W% %G%";
#endif
/*
* Module: image.c (Make XImage)
* Project: PROS -- ROSAT RSDC
* Purpose: Stencil label icons onto blank (or prepared) button border
* bitmaps and install as XImage's in the button record
* Subroutines: btn_MakeXImages() returns: void
* Subroutines: static btn_AddLabel() returns: void
* Subroutines: static btn_LabelX() returns: int
* Subroutines: static btn_LabelY() returns: int
* Xlib calls: XCreateImage()
* Copyright: 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 18 March 1989
* {n} <who> -- <does what> -- <when>
*/
#include <stdio.h> /* define NULL */
#include <X11/Xlib.h>
#include "buttons.h"
/*
* Subroutine: btn_MakeXImages
* Purpose: Create XImage bitmaps for four states of a button
* Returns: void
* Called by: btn_LabelButtons() in MakeBox.c
* Uses: btn_Alloc() in BtnAlloc.c
* Uses: btn_AddLabel() below;
* Xlib calls: XCreateImage() with XYBitmap constant.
* Pre-state: four model bitmaps with the border pattern installed
* Post-state: off_out, off_in, on_out, on_in XImage's set in button record.
* Exception: Only labels present are installed.
*/
void btn_MakeXImages ( button, width, height, byte_width, visual,
off_out, off_in, on_out, on_in, mapsz, off, on, motf )
ButtonRecord *button; /* i: main structure describing button */
int width; /* i: width in pixels of button */
int height; /* i: height in pixels of button */
int byte_width; /* i: width in bytes of the button bitmap */
Visual *visual; /* i: visual for XCreateImage() */
unsigned char *off_out; /* i: filled bitmap with only border pattern */
unsigned char *off_in; /* i: filled bitmap with only border pattern */
unsigned char *on_out; /* i: filled bitmap with only border pattern */
unsigned char *on_in; /* i: filled bitmap with only border pattern */
int mapsz; /* i: size of button bitmap in bytes */
int off, on; /* i: reverse video when in on or off state */
int motf; /* i: don't use occupied labels */
{
unsigned char *data; /* l: pointer to bitmap currently processing */
XImage *ximage;
char *btn_Alloc();
static void btn_AddLabel();
#ifdef ALLIANT
extern int nbutton;
#endif
/* put the dimensions in the button record */
button->width = (unsigned int)width;
button->height = (unsigned int)height;
/* make bitmap for unoccupied off state */
data = (unsigned char *)btn_Alloc(mapsz, sizeof(char), "button bitmap");
bcopy((char *)off_out, (char *)data, mapsz);
if( button->look->off_out_1 != NULL )
btn_AddLabel(button->look->off_out_1,
width, height, byte_width, data, off);
if( button->look->off_out_2 != NULL )
btn_AddLabel(button->look->off_out_2,
width, height, byte_width, data, off);
ximage = XCreateImage
(button->display, visual, (unsigned int)1, XYBitmap, 0, (char *)data,
(unsigned int)width, (unsigned int)height, 8, byte_width);
/* set for "bitmap" standard order */
ximage->byte_order = LSBFirst;
ximage->bitmap_bit_order = LSBFirst;
button->image[OFF_OUT] = ximage;
/* make bitmap for occupied off state */
data = (unsigned char *)btn_Alloc(mapsz, sizeof(char), "button bitmap");
bcopy((char *)off_in, (char *)data, mapsz);
if( motf ) {
if( button->look->off_out_1 != NULL )
btn_AddLabel(button->look->off_out_1,
width, height, byte_width, data, off);
if( button->look->off_out_2 != NULL )
btn_AddLabel(button->look->off_out_2,
width, height, byte_width, data, off);
} else {
if( button->look->off_in_1 != NULL )
btn_AddLabel(button->look->off_in_1,
width, height, byte_width, data, off);
if( button->look->off_in_2 != NULL )
btn_AddLabel(button->look->off_in_2,
width, height, byte_width, data, off);
}
ximage = XCreateImage
(button->display, visual, (unsigned int)1, XYBitmap, 0, (char *)data,
(unsigned int)width, (unsigned int)height, 8, byte_width);
/* set for "bitmap" standard order */
ximage->byte_order = LSBFirst;
ximage->bitmap_bit_order = LSBFirst;
button->image[OFF_IN] = ximage;
/* make bitmap for unoccupied on state */
data = (unsigned char *)btn_Alloc(mapsz, sizeof(char), "button bitmap");
bcopy((char *)on_out, (char *)data, mapsz);
if( motf > 1 ) {
if( button->look->on_in_1 != NULL )
btn_AddLabel(button->look->on_in_1, width, height, byte_width, data, on);
if( button->look->on_in_2 != NULL )
btn_AddLabel(button->look->on_in_2, width, height, byte_width, data, on);
} else {
if( button->look->on_out_1 != NULL )
btn_AddLabel(button->look->on_out_1,
width, height, byte_width, data, on);
if( button->look->on_out_2 != NULL )
btn_AddLabel(button->look->on_out_2,
width, height, byte_width, data, on);
}
ximage = XCreateImage
(button->display, visual, (unsigned int)1, XYBitmap, 0, (char *)data,
(unsigned int)width, (unsigned int)height, 8, byte_width);
/* set for "bitmap" standard order */
ximage->byte_order = LSBFirst;
ximage->bitmap_bit_order = LSBFirst;
button->image[ON_OUT] = ximage;
/* make bitmap for occupied on state */
data = (unsigned char *)btn_Alloc(mapsz, sizeof(char), "button bitmap");
bcopy((char *)on_in, (char *)data, mapsz);
if( motf == 1 ) {
if( button->look->on_out_1 != NULL )
btn_AddLabel(button->look->on_out_1,
width, height, byte_width, data, on);
if( button->look->on_out_2 != NULL )
btn_AddLabel(button->look->on_out_2,
width, height, byte_width, data, on);
} else {
if( button->look->on_in_1 != NULL )
btn_AddLabel(button->look->on_in_1, width, height, byte_width, data, on);
if( button->look->on_in_2 != NULL )
btn_AddLabel(button->look->on_in_2, width, height, byte_width, data, on);
}
ximage = XCreateImage
(button->display, visual, (unsigned int)1, XYBitmap, 0, (char *)data,
(unsigned int)width, (unsigned int)height, 8, byte_width);
/* set for "bitmap" standard order */
ximage->byte_order = LSBFirst;
ximage->bitmap_bit_order = LSBFirst;
button->image[ON_IN] = ximage;
#ifdef ALLIANT
button->id[OFF_OUT] = nbutton++;
button->id[OFF_IN] = nbutton++;
button->id[ON_OUT] = nbutton++;
button->id[ON_IN] = nbutton++;
#endif
}
/*
* Subroutine: btn_AddLabel
* Purpose: Add the label icon to a button's bitmap.
* Returns: void
* Called by: btn_CreateButtons()
* Uses: btn_StencilLabel() in StencilLbl.c
* Uses: btn_LabelX() or btn_LabelY() below
* Xlib calls: none
* Pre-state: bitmap already contains border pattern
* Post-state: bitmap has label stenciled on
* Exception: Label is not stenciled if one dimension would be zero.
* Method: Get basic alignment parameters and call btn_StencilLabel();
*/
static void btn_AddLabel ( label, width, height, byte_width, bitmap, inverse )
ButtonLabel *label; /* i: record of label bitmap to stencil in */
int width; /* i: width in pixels of button */
int height; /* i: height in pixels of button */
int byte_width; /* i: width in bytes of the button bitmap */
unsigned char *bitmap;
int inverse; /* i: invert the bits for reverse video look */
{
int src_x, src_y; /* l: coords of start of stencil in src (label) */
int dst_x, dst_y; /* l: coords of start of stencil in dst (button) */
int xwdth; /* l: width (cols) to stencil */
int yhght; /* l: number of lines (rows) to stencil */
static int btn_LabelX(), btn_LabelY();
void btn_StencilLabel();
if( ((xwdth = btn_LabelX(label, width, &src_x, &dst_x)) > 0) &&
((yhght = btn_LabelY(label, height, &src_y, &dst_y)) > 0) ) {
btn_StencilLabel(label->label, label->mask, bitmap,
label->bytes_per_line, byte_width, src_x, src_y,
dst_x, dst_y, xwdth, yhght, inverse);
}
}
/*
* Subroutine: btn_LabelX
* Purpose: Determine width and x coordinates to copy label onto the button
* Returns: width to copy
* Called by: btn_AddLabel() above
* Uses: nothing
* Xlib calls: none
* Pre-state: label structure with
* Post-state: dst bitmap has label stenciled on
* Method: If there is enough room, the entire label is copied. If not,
* the x_clip value indicates what to cut off. If x_clip=0, the
* same amount is removed from both sides. If x_clip!=0, use
* the breaks array to select a specific break point (usually
* representing the breaks between characters). If x_clip>0
* cut from the left, if x_clip<0 cut from the left.
* The postition within the button is determined by x_ratio:
* 0 is at the left, .5 in the middle, 1 at the right, and then
* offset x_offset pixels. This has no meaning when cutting was
* needed, as the label will fill the entire width.
*/
static int btn_LabelX ( label, width, lbl_x, btn_x )
ButtonLabel *label;
int width;
int *lbl_x;
int *btn_x;
{
int xwdth;
/* if full label height fits */
if( width >= label->width ) {
*lbl_x = 0;
xwdth = label->width;
/* else label must be clipped to fit */
} else {
/* clip symmetrically on both ends, use button's width */
if( label->x_clip == 0 ) {
*lbl_x = (label->width - width) / 2;
*btn_x = 0;
return( width );
/* clip at given quanta */
} else {
/* find the appropriate length */
int stop;
stop = label->x_clip;
if( stop < 0 )
stop = -stop;
while( ((--stop) >= 0) && (label->breaks[stop] > width) );
if( stop < 0 )
return( 0 );
else
xwdth = label->breaks[stop];
/* set the appropriate starting offset */
if( label->x_clip > 0 )
*lbl_x = 0;
else
*lbl_x = label->width - xwdth;
}
}
/* determine where to start in button (first ideal, then adjest if needed) */
*btn_x = ((width - xwdth) * label->x_ratio) + label->x_offset;
if( *btn_x < 0 ) {
*btn_x = 0;
} else if( *btn_x > (width - xwdth) ) {
*btn_x = width - xwdth;
}
return( xwdth );
}
/*
* Subroutine: btn_LabelY
* Purpose: Determine height and y coordinates to copy label onto button
* Returns: height to copy
* Called by: btn_AddLabal() above
* Uses: nothing
* Xlib calls: none
* Pre-state: label structure with
* Post-state: dst bitmap has label stenciled on
* Method: If there is enough room, the entire label is copied. If not,
* the y_clip value indicates what to cut off. If y_clip=0, the
* same amount is removed from both sides. If y_clip!=0, use
* the breaks array to select a specific break point (usually
* representing the breaks between characters). If y_clip>0
* cut from the left, if y_clip<0 cut from the left.
* The postition within the button is determined by y_ratio:
* 0 is at the left, .5 in the middle, 1 at the right, and then
* offset y_offset pixels. This has no meaning when cutting was
* needed, as the label will fill the entire height.
*/
static int btn_LabelY ( label, height, lbl_y, btn_y )
ButtonLabel *label;
int height;
int *lbl_y;
int *btn_y;
{
int yhght;
/* if full label height fits */
if( height >= label->height ) {
*lbl_y = 0;
yhght = label->height;
/* else label must be clipped to fit */
} else {
/* clip symmetrically on both ends, use button's height */
if( label->y_clip == 0 ) {
*lbl_y = (label->height - height) / 2;
*btn_y = 0;
return( height );
/* clip at given quanta */
} else {
/* find the appropriate length */
int stop;
stop = label->y_clip;
if( stop < 0 )
stop = -stop;
while( ((--stop) >= 0) && (label->breaks[stop] > height) );
if( stop < 0 )
return( 0 );
else
yhght = label->breaks[stop];
/* set the appropriate starting offset */
if( label->y_clip > 0 )
*lbl_y = 0;
else
*lbl_y = label->height - yhght;
}
}
/* determine where to start in button (first ideal, then adjest if needed) */
*btn_y = ((height - yhght) * label->y_ratio) + label->y_offset;
if( *btn_y < 0 ) {
*btn_y = 0;
} else if( *btn_y > (height - yhght) ) {
*btn_y = height - yhght;
}
return( yhght );
}