home *** CD-ROM | disk | FTP | other *** search
- //
- // "$Id: Fl_Pixmap.cxx,v 1.9 1999/02/16 15:10:53 mike 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".
- //
-
- // Draws X pixmap data, keeping it stashed in a server pixmap so it
- // redraws fast.
-
- // See fl_draw_pixmap.C for code used to get the actual data into pixmap.
- // Implemented without using the xpm library (which I can't use because
- // it interferes with the color cube used by fl_draw_image).
-
- #include <FL/Fl.H>
- #include <FL/fl_draw.H>
- #include <FL/x.H>
- #include <FL/Fl_Widget.H>
- #include <FL/Fl_Menu_Item.H>
- #include <FL/Fl_Pixmap.H>
-
- #include <stdio.h>
-
- extern uchar **fl_mask_bitmap; // used by fl_draw_pixmap.C to store mask
- void fl_restore_clip(); // in fl_rect.C
-
- void Fl_Pixmap::draw(int XP, int YP, int WP, int HP, int cx, int cy) {
- // ignore empty or bad pixmap data:
- if (w<0) {
- fl_measure_pixmap(data, w, h);
- if (WP==-1) { WP = w; HP = h; }
- }
- if (!w) return;
- // account for current clip region (faster on Irix):
- int X,Y,W,H; fl_clip_box(XP,YP,WP,HP,X,Y,W,H);
- cx += X-XP; cy += Y-YP;
- // clip the box down to the size of image, quit if empty:
- if (cx < 0) {W += cx; X -= cx; cx = 0;}
- if (cx+W > w) W = w-cx;
- if (W <= 0) return;
- if (cy < 0) {H += cy; Y -= cy; cy = 0;}
- if (cy+H > h) H = h-cy;
- if (H <= 0) return;
- if (!id) {
- id = (ulong)fl_create_offscreen(w, h);
- fl_begin_offscreen((Fl_Offscreen)id);
- uchar *bitmap = 0;
- fl_mask_bitmap = &bitmap;
- fl_draw_pixmap(data, 0, 0, FL_BLACK);
- fl_mask_bitmap = 0;
- if (bitmap) {
- #ifdef WIN32 // Matt: mask done
- // this won't work ehen the user changes display mode during run or
- // has two screens with differnet depths
- static uchar hiNibble[16] =
- { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
- 0x10, 0x90, 0x50, 0xd0, 0x20, 0xb0, 0x70, 0xf0 };
- static uchar loNibble[16] =
- { 0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e,
- 0x01, 0x09, 0x05, 0x0d, 0x02, 0x0b, 0x07, 0x0f };
- int np = GetDeviceCaps(fl_gc, PLANES); //: was always one on sample machines
- int bpp = GetDeviceCaps(fl_gc, BITSPIXEL);//: 1,4,8,16,24,32 and more odd stuff?
- int Bpr = (bpp*w+7)/8; //: bytes per row
- int pad = Bpr&1, w1 = (w+7)/8, shr = ((w-1)&7)+1;
- if (bpp==4) shr = (shr+1)/2;
- uchar *newarray = new uchar[(Bpr+pad)*h], *dst = newarray, *src = bitmap;
- for (int i=0; i<h; i++) {
- //: this is slooow, but we do it only once per pixmap
- for (int j=w1; j>0; j--) {
- uchar b = *src++;
- if (bpp==1) {
- *dst++ = ( hiNibble[b&15] ) | ( loNibble[(b>>4)&15] );
- } else if (bpp==4) {
- for (int k=(j==1)?shr:4; k>0; k--) {
- *dst++ = "\377\360\017\000"[b&3];
- b = b >> 2;
- }
- } else {
- for (int k=(j==1)?shr:8; k>0; k--) {
- if (b&1) {
- *dst++=0;
- if (bpp>8) *dst++=0;
- if (bpp>16) *dst++=0;
- if (bpp>24) *dst++=0;
- } else {
- *dst++=0xff;
- if (bpp>8) *dst++=0xff;
- if (bpp>16) *dst++=0xff;
- if (bpp>24) *dst++=0xff;
- }
- b = b >> 1;
- }
- }
- }
- dst += pad;
- }
- mask = (ulong)CreateBitmap(w, h, np, bpp, newarray);
- delete[] newarray;
- #else
- mask = XCreateBitmapFromData(fl_display, fl_window,
- (const char*)bitmap, (w+7)&-8, h);
- #endif
- delete[] bitmap;
- }
- fl_end_offscreen();
- }
- #ifdef WIN32
- if (mask) {
- HDC new_gc = CreateCompatibleDC(fl_gc);
- SelectObject(new_gc, (void*)mask);
- BitBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, SRCAND);
- SelectObject(new_gc, (void*)id);
- BitBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, SRCPAINT);
- DeleteDC(new_gc);
- } else {
- fl_copy_offscreen(X, Y, W, H, (Fl_Offscreen)id, cx, cy);
- }
- #else
- if (mask) {
- // I can't figure out how to combine a mask with existing region,
- // so cut the image down to a clipped rectangle:
- int nx, ny; fl_clip_box(X,Y,W,H,nx,ny,W,H);
- cx += nx-X; X = nx;
- cy += ny-Y; Y = ny;
- // make X use the bitmap as a mask:
- XSetClipMask(fl_display, fl_gc, mask);
- int ox = X-cx; if (ox < 0) ox += w;
- int oy = Y-cy; if (oy < 0) oy += h;
- XSetClipOrigin(fl_display, fl_gc, X-cx, Y-cy);
- }
- fl_copy_offscreen(X, Y, W, H, (Fl_Offscreen)id, cx, cy);
- if (mask) {
- // put the old clip region back
- XSetClipOrigin(fl_display, fl_gc, 0, 0);
- fl_restore_clip();
- }
- #endif
- }
-
- Fl_Pixmap::~Fl_Pixmap() {
- if (id) fl_delete_offscreen((Fl_Offscreen)id);
- if (mask) fl_delete_offscreen((Fl_Offscreen)mask);
- }
-
- static void pixmap_labeltype(
- const Fl_Label* o, int x, int y, int w, int h, Fl_Align a)
- {
- Fl_Pixmap* b = (Fl_Pixmap*)(o->value);
- if (b->w<0) fl_measure_pixmap(b->data, b->w, b->h);
- int cx;
- if (a & FL_ALIGN_LEFT) cx = 0;
- else if (a & FL_ALIGN_RIGHT) cx = b->w-w;
- else cx = (b->w-w)/2;
- int cy;
- if (a & FL_ALIGN_TOP) cy = 0;
- else if (a & FL_ALIGN_BOTTOM) cy = b->h-h;
- else cy = (b->h-h)/2;
- b->draw(x,y,w,h,cx,cy);
- }
-
- static void pixmap_measure(const Fl_Label* o, int& w, int& h) {
- Fl_Pixmap* b = (Fl_Pixmap*)(o->value);
- if (b->w<0) fl_measure_pixmap(b->data, b->w, b->h);
- w = b->w;
- h = b->h;
- }
-
- void Fl_Pixmap::label(Fl_Widget* o) {
- Fl::set_labeltype(_FL_PIXMAP_LABEL, pixmap_labeltype, pixmap_measure);
- o->label(_FL_PIXMAP_LABEL, (const char*)this);
- }
-
- void Fl_Pixmap::label(Fl_Menu_Item* o) {
- Fl::set_labeltype(_FL_PIXMAP_LABEL, pixmap_labeltype, pixmap_measure);
- o->label(_FL_PIXMAP_LABEL, (const char*)this);
- }
-
- //
- // End of "$Id: Fl_Pixmap.cxx,v 1.9 1999/02/16 15:10:53 mike Exp $".
- //
-