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- //
- // "$Id: fl_draw_pixmap.cxx,v 1.4.2.3 1999/09/16 05:34:27 bill Exp $"
- //
- // Pixmap drawing code for the Fast Light Tool Kit (FLTK).
- //
- // Copyright 1998-1999 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 = (uchar**)(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 1.4.2.3 1999/09/16 05:34:27 bill Exp $".
- //
-