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/*
* images.c -- $Id: images.c 685 2003-03-08 15:26:51Z travo $
* p_pixmap and p_rgbmap for X11
*
* Copyright (c) 1998. See accompanying LEGAL file for details.
*/
#include "config.h"
#include "playx.h"
#include "pstdlib.h"
static void x_image(p_win *w, unsigned char *bytes, int rgb, int ncols,
int nrows, int x0, int y0, int x1, int y1);
static int x_put1(XImage *im, int i, int j, p_col_t pixel);
static int x_put2b(XImage *im, int i, int j, p_col_t pixel);
static int x_put2l(XImage *im, int i, int j, p_col_t pixel);
static int x_put3b(XImage *im, int i, int j, p_col_t pixel);
static int x_put3l(XImage *im, int i, int j, p_col_t pixel);
static int x_put4b(XImage *im, int i, int j, p_col_t pixel);
static int x_put4l(XImage *im, int i, int j, p_col_t pixel);
void
p_ndx_cell(p_win *w, unsigned char *ndxs, int ncols, int nrows,
int x0, int y0, int x1, int y1)
{
x_image(w, ndxs, 0, ncols, nrows, x0, y0, x1, y1);
}
void
p_rgb_cell(p_win *w, unsigned char *rgbs, int ncols, int nrows,
int x0, int y0, int x1, int y1)
{
x_image(w, rgbs, 1, ncols, nrows, x0, y0, x1, y1);
}
static void
x_image(p_win *w, unsigned char *bytes, int rgb, int ncols,
int nrows, int x0, int y0, int x1, int y1)
{
unsigned char *cell;
int bpp, xa, ya, xb, yb, r, dr, dy, c, dc, dx;
int width = x1-x0;
int height = y1-y0;
int yexpand = (height>=nrows);
int xexpand = (width>=ncols);
int drow = rgb? 3 : 1;
int dcol = rgb? 3*ncols : ncols;
p_scr *s = w->s;
Display *dpy = s->xdpy->dpy;
GC gc = x_getgc(s, w, FillSolid);
XImage *im;
if (s->image) x_imzap(s);
s->own_image_data = 1;
im = s->image = XCreateImage(dpy, DefaultVisual(dpy, s->scr_num),
s->depth, ZPixmap, 0, (char *)0,
width, height, BitmapPad(dpy), 0);
bpp = im->bits_per_pixel;
if (yexpand) {
r = ((unsigned int)nrows)>>1;
dr = height%nrows - nrows;
dy = height/nrows;
} else {
r = ((unsigned int)height)>>1;
dr = nrows%height - height;
dy = (nrows/height)*dcol;
}
if (xexpand) {
c = ((unsigned int)ncols)>>1;
dc = width%ncols - ncols;
dx = width/ncols;
} else {
c = ((unsigned int)width)>>1;
dc = ncols%width - width;
dx = (ncols/width)*drow;
}
if ((long)bpp*(long)width*(long)height > 288L*(long)ncols*(long)nrows) {
/* less X protocol traffic in a series of filled rectangles */
int c0 = ((unsigned int)c)>>1;
x_imzap(s); /* wasteful to have created image,
* but easiest way to get bpp... */
for (ya=yb=y0 ; ya<y1 ; ya=yb) {
r += dr;
if (yexpand) {
yb += dy;
if (r>=0) yb++;
else r += nrows;
} else {
yb++;
}
cell = bytes;
c = c0;
for (xa=xb=x0 ; xa<x1 ; xa=xb) {
c += dc;
if (xexpand) {
xb += dx;
if (c>=0) xb++;
else c += ncols;
} else {
xb++;
}
p_color(w, rgb? P_RGB(cell[0], cell[1], cell[2]) : cell[0]);
XFillRectangle(dpy, w->d, gc, xa, ya, xb-xa, yb-ya);
if (xexpand) {
cell += drow;
} else {
cell += dx;
if (c>=0) cell += drow;
else c += width;
}
}
if (yexpand) {
bytes += dcol;
} else {
bytes += dy;
if (r>=0) bytes += dcol;
else r += height;
}
}
} else {
/* less X protocol traffic in one image */
int (*put_pixel)(XImage *, int, int, p_col_t)= 0;
int bpl = im->bytes_per_line;
p_col_t pixel;
im->data = p_malloc(bpl*height);
if (!im->data) { x_imzap(s); return; }
if (bpp==8) {
put_pixel = x_put1, bpp = 1;
} else if (im->byte_order==MSBFirst) {
if (bpp==32) put_pixel = x_put4b, bpp = 4;
else if (bpp==16) put_pixel = x_put2b, bpp = 2;
else if (bpp==24) put_pixel = x_put3b, bpp = 3;
} else {
if (bpp==32) put_pixel = x_put4l, bpp = 4;
else if (bpp==16) put_pixel = x_put2l, bpp = 2;
else if (bpp==24) put_pixel = x_put3l, bpp = 3;
}
if (put_pixel) {
y1 = height*bpl;
if (yexpand) dy *= bpl;
x1 = width*bpp;
if (xexpand) dx *= bpp;
} else {
/* generic case is slow, but still more efficient than setting
* the image parameters and letting XPutImage do the work --
* XPutImage uses XGetPixel as well as XPutPixel for this case
* (this is same as XPutPixel macro in Xutil.h) */
put_pixel = (int (*)(XImage *, int, int, p_col_t))im->f.put_pixel;
if (bpp==1) p_color(w, P_FG);
y1 = height;
bpl = 1;
x1 = width;
bpp = 1;
}
if (ncols==width && nrows==height) {
for (r=0 ; r<y1 ; r+=bpl)
for (c=0 ; c<x1 ; c+=bpp) {
pixel = rgb? P_RGB(bytes[0], bytes[1], bytes[2]) : bytes[0];
bytes += drow;
put_pixel(im, c, r, x_getpixel(w, pixel));
}
} else {
int i, j;
int c0 = ((unsigned int)c)>>1;
for (ya=yb=0 ; yb<y1 ; ya=yb) {
r += dr;
if (yexpand) {
yb += dy;
if (r>=0) yb += bpl;
else r += nrows;
} else {
yb += bpl;
}
cell = bytes;
c = c0;
for (xa=xb=0 ; xb<x1 ; xa=xb) {
c += dc;
if (xexpand) {
xb += dx;
if (c>=0) xb += bpp;
else c += ncols;
} else {
xb += bpp;
}
pixel = rgb? P_RGB(cell[0], cell[1], cell[2]) : cell[0];
pixel = x_getpixel(w, pixel);
for (j=ya ; j<yb ; j+=bpl)
for (i=xa ; i<xb ; i+=bpp)
put_pixel(im, i, j, pixel);
if (xexpand) {
cell += drow;
} else {
cell += dx;
if (c>=0) cell += drow;
else c += width;
}
}
if (yexpand) {
bytes += dcol;
} else {
bytes += dy;
if (r>=0) bytes += dcol;
else r += height;
}
}
}
XPutImage(dpy, w->d, gc, im, 0,0, x0, y0, width, height);
x_imzap(s);
}
if (p_signalling) p_abort();
}
static int
x_put1(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i] = pixel;
return 0;
}
static int
x_put2b(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i+0] = pixel>>8;
data[j+i+1] = pixel;
return 0;
}
static int
x_put2l(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i+0] = pixel;
data[j+i+1] = pixel>>8;
return 0;
}
static int
x_put3b(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i+0] = pixel>>16;
data[j+i+1] = pixel>>8;
data[j+i+2] = pixel;
return 0;
}
static int
x_put3l(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i+0] = pixel;
data[j+i+1] = pixel>>8;
data[j+i+2] = pixel>>16;
return 0;
}
static int
x_put4b(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i+0] = pixel>>24;
data[j+i+1] = pixel>>16;
data[j+i+2] = pixel>>8;
data[j+i+3] = pixel;
return 0;
}
static int
x_put4l(XImage *im, int i, int j, p_col_t pixel)
{
unsigned char *data = (unsigned char *)im->data;
data[j+i+0] = pixel;
data[j+i+1] = pixel>>8;
data[j+i+2] = pixel>>16;
data[j+i+3] = pixel>>24;
return 0;
}
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