Grx September 2000

grx@gnu.de

3 participants
4 discussions

GRX 2.3.2
by Mariano Alvarez Fernandez 15 Sep '00

15 Sep '00

Hi. I want to package the next GRX release, and I think the most urgent is to compatibilize the BGI license with GRX. I plain to change the head of every source file to this: /** ** [FILENAME.C] ---- [small description] ** ** Copyright (c) [year] [author], [author information] ** ** This file is part of the GRX graphics library. ** ** The GRX graphics library is free software; you can redistribute it ** and/or modify it under some conditions; see the "copying.grx" file ** for details. ** ** 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. ** ** [Optional information about version and contibutions] ** **/ And the copying.grx file will be: --------------- This is file "copying.grx". This document describes the terms for distributing the source code of and any derived work based on the GRX graphics library. Such source code is marked with the next text: ** Copyright (c) [year] [author], [author information] ** ** This file is part of the GRX graphics library. ** ** The GRX graphics library is free software; you can redistribute it ** and/or modify it under some conditions; see the "copying.grx" file ** for details. Source code with the above copyright is distributed under the following terms: (1) The test programs for the graphics library (code in the 'test' sub-directory) is distributed without restrictions. This code is free for use in commercial, shareware or freeware applications. (2) The GRX graphics library is distributed under the terms of the GNU LGPL (Library General Public License) with the following amendments and/or exceptions: - Using the DOS versions (DOS only! this exception DOES NOT apply to the Linux version) you are permitted to distribute an application linked with GRX in binary only, provided that the documentation of the program: a) informs the user that GRX is used in the program, AND b) provides the user with the necessary information about how to obtain GRX. (i.e. ftp site, etc..) (3) Fonts (in the 'fonts' directory) are distributed according to the terms in the file "COPYING.MIT". Most of the fonts included with the GRX library were derived from fonts in the MIT X11R4 distribution. The exception is the "pc" BIOS font family, which is distributed without restrictions. A copy of the GNU GPL (in the file "COPYING") and the GNU LGPL (in the file "COPYING.LIB") is included with this document. If you did not receive a copy of "COPYING" or "COPYING.LIB", you may obtain one from where this document was obtained, or by writing to: Free Software Foundation 675 Mass Ave Cambridge, MA 02139 USA ----------------------------------- Please, Hartmut, Peter, Csaba, are you agree? Other things I want to do int the 2.3.2 release: - add the updated user's manual. - put bgi test programs in his own subdirectory. - make grx test programs use GrKeys functions. - add my ctx2pnm functions. Because my tech skills about graphics hardware aren't so good, I want to be only an "interim maintainer" while a more skilled person appears. Greetings, M.Alvarez

2 2

Animation (2)
by Josu Onandia 08 Sep '00

08 Sep '00

Hi again, I haven't received any answers for my previous email, that's why I've built my own solution: a function called GrBitBlt1bpp. As the name suggests, it's very similar to GrBitBlt, except that the source bitmap must have 1 bpp frame mode, and that it accepts two color parameters, foreground and background. I've put this function (provisionally) in bitblt.c Here is the source code. I haven't tested it exhaustively, only some cases. If anybody finds bugs, or has comments or suggestions, I would be glad to know about them. void GrBitBlt1bpp(GrContext *dst,int dx,int dy, GrContext *src,int x1,int y1,int x2,int y2,GrColor fg, GrColor bg) { int oldx1,oldy1; int oldx2,oldy2; int dstx2,dsty2; GRX_ENTER(); if(dst == NULL) dst = CURC; if(src == NULL) src = CURC; if(src->gc_driver->num_planes != 1 || src->gc_driver->bits_per_pixel != 1) return; isort(x1,x2); oldx1 = x1; isort(y1,y2); oldy1 = y1; cxclip_ordbox(src,x1,y1,x2,y2); oldx1 = (dx += (x1 - oldx1)); oldy1 = (dy += (y1 - oldy1)); oldx2 = dstx2 = dx + x2 - x1; oldy2 = dsty2 = dy + y2 - y1; clip_ordbox(dst,dx,dy,dstx2,dsty2); x1 += (dx - oldx1); y1 += (dy - oldy1); x2 -= (oldx2 - dstx2); y2 -= (oldy2 - dsty2); mouse_block(src,x1,y1,x2,y2); mouse_addblock(dst,dx,dy,dstx2,dsty2); (dst->gc_driver->drawbitmap)((dx + dst->gc_xoffset),(dy + dst->gc_yoffset), (x2 - x1 + 1),(y2 - y1 + 1),src->gc_baseaddr[0], src->gc_lineoffset, ((dx - oldx1) + ((dy - oldy1) * (src->gc_lineoffset << 3))), fg,bg); mouse_unblock(); GRX_LEAVE(); } Josu Onandia

1 0

Animation
by Josu Onandia 05 Sep '00

05 Sep '00

Hi, I need to do an animation. I have a monochrome image in memory that I want to move around the screen. I would like this image to be 1 bpp to save memory. The idea is to paint the image on the screen on some location. Then paint it again, but in black, to erase it, and then paint it on a different location, and so on. I create an in-memory context of 1 bpp, and draw there the image. What I need now is a function to put this context (or a subset of it) into the screen, but at the same time applying a foreground and a background colors. Is like painting text, in some way. The font itself is monochrome, and the colors and logical ops are applied in the process of painting. The functionality is there. Does anybody know how to use it to paint my bitmaps? Thanks Josu Onandia

1 0

GRX fonts.
by Mohamed Aly 01 Sep '00

01 Sep '00

I recently ported a DOS program from Borland to the DJGPP/GRX environment. I was looking for fonts for the GRX library. What font type should I look for? Is it GEM? Where to find more fonts or font utilities/editors to port my old MS WINDOWS fonts? Mohamed Aly

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Grx September 2000