mirrors/fltk
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
4b561b6e90
fltk/src/fl_draw_pixmap.cxx
Michael R Sweet 4b561b6e90 Updated copyright notices for all of the 1.0.x files. 
Updated the configure script for *BSD and GCC 2.95 (-fno-exceptions)

Added install rule to documentation directory.

Dumped old packages directory; added traditional RPM spec file and EPM
list file (that replace all of the packages stuff)

The FLUID man page is now "fluid.1" for the formatted page and "fluid.man"
for the non-formatted page, since only IRIX uses pack'd formatted man pages.

Whew!


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.0@1090 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
2000-04-25 22:17:00 +00:00

269 lines
7.4 KiB
C++
Raw Blame History

//
// "$Id: fl_draw_pixmap.cxx,v 1.4.2.5 2000/04/25 22:16:41 mike Exp $"
//
// Pixmap drawing code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2000 by Bill Spitzak and others.
//
// 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 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@easysw.com".
//
// Implemented without using the xpm library (which I can't use because
// it interferes with the color cube used by fl_draw_image).
// Current implementation is cheap and slow, and works best on a full-color
// display. Transparency is not handled, and colors are dithered to
// the color cube. Color index is achieved by adding the id
// characters together! Also mallocs a lot of temporary memory!
// Notice that there is no pixmap file interface. This is on purpose,
// as I want to discourage programs that require support files to work.
// All data needed by a program ui should be compiled in!!!
#include <config.h>
#include <FL/Fl.H>
#include <FL/fl_draw.H>
#include <FL/x.H>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
static int ncolors, chars_per_pixel;
int fl_measure_pixmap(/*const*/char * const *data, int &w, int &h) {
int i = sscanf(data[0],"%d %d %d %d",&w,&h,&ncolors,&chars_per_pixel);
if (i<4 || w<=0 || h<=0 ||
chars_per_pixel!=1 && chars_per_pixel!=2) return w=0;
return 1;
}
#ifdef U64
// The callback from fl_draw_image to get a row of data passes this:
struct pixmap_data {
int w, h;
const uchar*const* data;
union {
U64 colors[256];
U64* byte1[256];
};
};
// callback for 1 byte per pixel:
static void cb1(void*v, int x, int y, int w, uchar* buf) {
pixmap_data& d = *(pixmap_data*)v;
const uchar* p = d.data[y]+x;
U64* q = (U64*)buf;
for (int X=(w+1)/2; X--; p += 2) {
#if WORDS_BIGENDIAN
*q++ = (d.colors[p[0]]<<32) | d.colors[p[1]];
#else
*q++ = (d.colors[p[1]]<<32) | d.colors[p[0]];
#endif
}
}
// callback for 2 bytes per pixel:
static void cb2(void*v, int x, int y, int w, uchar* buf) {
pixmap_data& d = *(pixmap_data*)v;
const uchar* p = d.data[y]+2*x;
U64* q = (U64*)buf;
for (int X=(w+1)/2; X--;) {
U64* colors = d.byte1[*p++];
int index = *p++;
U64* colors1 = d.byte1[*p++];
int index1 = *p++;
#if WORDS_BIGENDIAN
*q++ = (colors[index]<<32) | colors1[index1];
#else
*q++ = (colors1[index1]<<32) | colors[index];
#endif
}
}
#else
// The callback from fl_draw_image to get a row of data passes this:
struct pixmap_data {
int w, h;
const uchar*const* data;
union {
U32 colors[256];
U32* byte1[256];
};
};
// callback for 1 byte per pixel:
static void cb1(void*v, int x, int y, int w, uchar* buf) {
pixmap_data& d = *(pixmap_data*)v;
const uchar* p = d.data[y]+x;
U32* q = (U32*)buf;
for (int X=w; X--;) *q++ = d.colors[*p++];
}
// callback for 2 bytes per pixel:
static void cb2(void*v, int x, int y, int w, uchar* buf) {
pixmap_data& d = *(pixmap_data*)v;
const uchar* p = d.data[y]+2*x;
U32* q = (U32*)buf;
for (int X=w; X--;) {
U32* colors = d.byte1[*p++];
*q++ = colors[*p++];
}
}
#endif
#ifdef WIN32
// this is in Fl_arg.C:
extern int fl_parse_color(const char*, uchar&, uchar&, uchar&);
#endif
uchar **fl_mask_bitmap; // if non-zero, create bitmap and store pointer here
int fl_draw_pixmap(/*const*/char*const* di, int x, int y, Fl_Color bg) {
pixmap_data d;
if (!fl_measure_pixmap(di, d.w, d.h)) return 0;
const uchar*const* data = (const uchar*const*)(di+1);
int transparent_index = -1;
if (ncolors < 0) { // fltk (non standard) compressed colormap
ncolors = -ncolors;
const uchar *p = *data++;
// if first color is ' ' it is transparent (put it later to make
// it not be transparent):
if (*p == ' ') {
uchar* c = (uchar*)&d.colors[' '];
#ifdef U64
*(U64*)c = 0;
#if WORDS_BIGENDIAN
c += 4;
#endif
#endif
transparent_index = ' ';
Fl::get_color(bg, c[0], c[1], c[2]); c[3] = 0;
p += 4;
ncolors--;
}
// read all the rest of the colors:
for (int i=0; i < ncolors; i++) {
uchar* c = (uchar*)&d.colors[*p++];
#ifdef U64
*(U64*)c = 0;
#if WORDS_BIGENDIAN
c += 4;
#endif
#endif
*c++ = *p++;
*c++ = *p++;
*c++ = *p++;
*c = 0;
}
} else { // normal XPM colormap with names
if (chars_per_pixel>1) memset(d.byte1, 0, sizeof(d.byte1));
for (int i=0; i<ncolors; i++) {
const uchar *p = *data++;
// the first 1 or 2 characters are the color index:
int index = *p++;
uchar* c;
if (chars_per_pixel>1) {
#ifdef U64
U64* colors = d.byte1[index];
if (!colors) colors = d.byte1[index] = new U64[256];
#else
U32* colors = d.byte1[index];
if (!colors) colors = d.byte1[index] = new U32[256];
#endif
c = (uchar*)&colors[*p];
index = (index<<8)+*p++;
} else {
c = (uchar *)&d.colors[index];
}
// look for "c word", or last word if none:
const uchar *previous_word = p;
for (;;) {
while (*p && isspace(*p)) p++; uchar what = *p++;
while (*p && !isspace(*p)) p++;
while (*p && isspace(*p)) p++;
if (!*p) {p = previous_word; break;}
if (what == 'c') break;
previous_word = p;
while (*p && !isspace(*p)) p++;
}
#ifdef U64
*(U64*)c = 0;
#if WORDS_BIGENDIAN
c += 4;
#endif
#endif
#ifdef WIN32
if (fl_parse_color((const char*)p, c[0], c[1], c[2])) {;
#else
XColor x;
if (XParseColor(fl_display, fl_colormap, (const char*)p, &x)) {
c[0] = x.red>>8; c[1] = x.green>>8; c[2] = x.blue>>8;
#endif
} else { // assumme "None" or "#transparent" for any errors
// this should be transparent...
Fl::get_color(bg, c[0], c[1], c[2]);
transparent_index = index;
}
}
}
d.data = data;
// build the mask bitmap used by Fl_Pixmap:
if (fl_mask_bitmap && transparent_index >= 0) {
int W = (d.w+7)/8;
uchar* bitmap = new uchar[W * d.h];
*fl_mask_bitmap = bitmap;
for (int y = 0; y < d.h; y++) {
const uchar* p = data[y];
if (chars_per_pixel <= 1) {
for (int x = 0; x < W; x++) {
int b = (*p++ != transparent_index);
if (*p++ != transparent_index) b |= 2;
if (*p++ != transparent_index) b |= 4;
if (*p++ != transparent_index) b |= 8;
if (*p++ != transparent_index) b |= 16;
if (*p++ != transparent_index) b |= 32;
if (*p++ != transparent_index) b |= 64;
if (*p++ != transparent_index) b |= 128;
*bitmap++ = b;
}
} else {
for (int x = 0; x < W; x++) {
int b = 0;
for (int i = 0; i < 8; i++) {
int index = *p++;
index = (index<<8) | (*p++);
if (index != transparent_index) b |= (1<<i);
}
*bitmap++ = b;
}
}
}
}
fl_draw_image(chars_per_pixel==1 ? cb1 : cb2, &d, x, y, d.w, d.h, 4);
if (chars_per_pixel > 1) for (int i = 0; i < 256; i++) delete d.byte1[i];
return 1;
}
//
// End of "$Id: fl_draw_pixmap.cxx,v 1.4.2.5 2000/04/25 22:16:41 mike Exp $".
//
Reference in New Issue View Git Blame Copy Permalink