From: Francois Fleuret Date: Sun, 7 Nov 2010 17:14:32 +0000 (+0100) Subject: Initial commit X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=commitdiff_plain;ds=inline;p=simple-window.git Initial commit --- 39bfbaa751bf606411fc7acf1376cd3737b871db diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..44f310b --- /dev/null +++ b/Makefile @@ -0,0 +1,34 @@ + +######################################################################### +# This program is free software: you can redistribute it and/or modify # +# it under the terms of the version 3 of the GNU General Public License # +# as published by the Free Software Foundation. # +# # +# This program 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 # +# General Public License for more details. # +# # +# You should have received a copy of the GNU General Public License # +# along with this program. If not, see . # +# # +# Written by and Copyright (C) Francois Fleuret # +# Contact for comments & bug reports # +######################################################################### + +CXXFLAGS = -Wall + +LDFLAGS=-lX11 + +all: example + +example: example.cc simple_window.o + $(CXX) $(OPTIONS) -o $@ $^ $(LDFLAGS) + +Makefile.depend: *.h *.cc Makefile + $(CC) -M *.cc > Makefile.depend + +clean: + rm -f *.o example Makefile.depend + +-include Makefile.depend diff --git a/example.cc b/example.cc new file mode 100644 index 0000000..7a91406 --- /dev/null +++ b/example.cc @@ -0,0 +1,59 @@ + +/////////////////////////////////////////////////////////////////////////// +// This program is free software: you can redistribute it and/or modify // +// it under the terms of the version 3 of the GNU General Public License // +// as published by the Free Software Foundation. // +// // +// This program 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 // +// General Public License for more details. // +// // +// You should have received a copy of the GNU General Public License // +// along with this program. If not, see . // +// // +// Written by and Copyright (C) Francois Fleuret // +// Contact for comments & bug reports // +/////////////////////////////////////////////////////////////////////////// + +#include + +#include "simple_window.h" + +using namespace std; + +int main() { + SimpleWindow window("Mandelbrot", 600, 600); + int n; + int depth = 100; + + const int width = window.get_width(); + const int height = window.get_height(); + + window.map(); + + for(int i = 0; i < width; i++) + for(int j = 0; j < height; j++) { + double cr = -2.0 + 3.0 * (double(i)/double(width)); + double ci = -1.5 + 3.0 * (double(j)/double(height)); + double zr = 0, zi = 0; + for(n = 0; (n < depth) && (zr*zr + zi*zi < 100); n++) { + double t = zr*zr -zi*zi + cr; + zi = 2*zr*zi + ci; + zr = t; + } + + float a = float(n)/float(depth); + + if(a < 0.5) window.color(0, 0, a*2); + else window.color((a-0.5)*2, (a-0.5)*2, 1.0); + + window.draw_point(i, j); + } + + window.show(); + + cout << "Press [ENTER] to close the window.\n"; + + cin.get(); +} diff --git a/simple_window.cc b/simple_window.cc new file mode 100644 index 0000000..5dd0aca --- /dev/null +++ b/simple_window.cc @@ -0,0 +1,152 @@ + +/////////////////////////////////////////////////////////////////////////// +// This program is free software: you can redistribute it and/or modify // +// it under the terms of the version 3 of the GNU General Public License // +// as published by the Free Software Foundation. // +// // +// This program 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 // +// General Public License for more details. // +// // +// You should have received a copy of the GNU General Public License // +// along with this program. If not, see . // +// // +// Written by and Copyright (C) Francois Fleuret // +// Contact for comments & bug reports // +/////////////////////////////////////////////////////////////////////////// + +#include "simple_window.h" + +SimpleWindow::SimpleWindow(const char *name, int w, int h) { + + width = w; height = h; + + dpy = XOpenDisplay(0); + + if (dpy) { + + Visual *v = XDefaultVisual(dpy, DefaultScreen(dpy)); + + blue_mask = v->blue_mask; + green_mask = v->green_mask; + red_mask = v->red_mask; + + if(blue_mask == 0 || green_mask == 0 || red_mask == 0) { + std::cerr << "Can not deal with the colors on that display.\n"; + } + + // We compute how many bits we have for each component, and + // compute the corresponding mask + red_shift = 1; + while(!(red_mask & 1)) { + red_mask = red_mask >> 1; + red_shift = red_shift << 1; + } + + green_shift = 1; + while(!(green_mask & 1)) { + green_mask = green_mask >> 1; + green_shift = green_shift << 1; + } + + blue_shift = 1; + while(!(blue_mask & 1)) { + blue_mask = blue_mask >> 1; + blue_shift = blue_shift << 1; + } + + gc = DefaultGC(dpy, DefaultScreen(dpy)); + + XSetWindowAttributes xswa; + + pixmap = XCreatePixmap(dpy, DefaultRootWindow(dpy), + width, height, DisplayPlanes(dpy, DefaultScreen(dpy))); + + xswa.background_pixmap = pixmap; + xswa.event_mask = NoEventMask; + xswa.backing_store = Always; + + window = XCreateWindow(dpy, DefaultRootWindow(dpy), 0, 0, width, height, + 0, 0, InputOutput, CopyFromParent, + CWBackPixmap | CWEventMask | CWBackingStore, + &xswa); + + XSizeHints size_hints; + size_hints.flags = PMinSize | PMaxSize; + size_hints.min_width = width; + size_hints.min_height = height; + size_hints.max_width = width; + size_hints.max_height = height; + XSetNormalHints(dpy, window, &size_hints); + + XStoreName(dpy, window, name); + + XSetState(dpy, gc, 0, 0, GXcopy, AllPlanes); + XFillRectangle(dpy, pixmap, gc, 0, 0, width, height); + XFlush(dpy); + } else abort(); +} + +SimpleWindow::~SimpleWindow() { + XUnmapWindow(dpy, window); + XDestroyWindow(dpy, window); + XCloseDisplay(dpy); +} + +int SimpleWindow::get_width() { + return width; +} + +int SimpleWindow::get_height() { + return height; +} + +void SimpleWindow::map() { + XMapWindow(dpy, window); + XFlush(dpy); +} + +void SimpleWindow::unmap() { + XUnmapWindow(dpy, window); + XFlush(dpy); +} + +void SimpleWindow::color(float red, float green, float blue) { + // We work under the assumption that the bits come in the + // red/green/blue order with the corresponding masks + XSetState(dpy, gc, + ((unsigned int) ( red * red_mask)) * red_shift + + ((unsigned int) (green * green_mask)) * green_shift + + ((unsigned int) ( blue * blue_mask)) * blue_shift, + 0, GXcopy, AllPlanes); +} + +void SimpleWindow::draw_point(int x, int y) { + XDrawPoint(dpy, pixmap, gc, x, y); +} + +void SimpleWindow::draw_line(int x1, int y1, int x2, int y2) { + XDrawLine(dpy, pixmap, gc, x1, y1, x2, y2); +} + +void SimpleWindow::draw_circle(int x, int y, int r) { + XDrawArc(dpy, pixmap, gc, x-r, y-r, 2*r, 2*r, 0, 360*64); +} + +void SimpleWindow::draw_text(char *s, int x, int y) { + XDrawString(dpy, pixmap, gc, x, y, s, strlen(s)); +} + +void SimpleWindow::fill_rectangle(int x, int y, int w, int h) { + XFillRectangle(dpy, pixmap, gc, x, y, w, h); +} + +void SimpleWindow::show() { + XCopyArea(dpy, pixmap, window, gc, 0, 0, width, height, 0, 0); + XFlush(dpy); +} + +void SimpleWindow::fill() { + XFillRectangle(dpy, pixmap, gc, 0, 0, width, height); +} diff --git a/simple_window.h b/simple_window.h new file mode 100644 index 0000000..0732847 --- /dev/null +++ b/simple_window.h @@ -0,0 +1,64 @@ + +/////////////////////////////////////////////////////////////////////////// +// This program is free software: you can redistribute it and/or modify // +// it under the terms of the version 3 of the GNU General Public License // +// as published by the Free Software Foundation. // +// // +// This program 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 // +// General Public License for more details. // +// // +// You should have received a copy of the GNU General Public License // +// along with this program. If not, see . // +// // +// Written by and Copyright (C) Francois Fleuret // +// Contact for comments & bug reports // +/////////////////////////////////////////////////////////////////////////// + +#ifndef SIMPLE_WINDOW_H +#define SIMPLE_WINDOW_H + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +class SimpleWindow { + Display *dpy; + Window window; + Pixmap pixmap; + GC gc; + +protected: + int red_mask, green_mask, blue_mask; + int red_shift, green_shift, blue_shift; + int width, height; + +public: + SimpleWindow(const char *name, int w, int h); + virtual ~SimpleWindow(); + + virtual int get_width(); + virtual int get_height(); + + virtual void map(); + virtual void unmap(); + virtual void color(float red, float green, float blue); + virtual void draw_point(int x, int y); + virtual void draw_line(int x1, int y1, int x2, int y2); + virtual void draw_circle(int x, int y, int r); + virtual void draw_text(char *s, int x, int y); + virtual void fill_rectangle(int x, int y, int w, int h); + virtual void show(); + virtual void fill(); +}; + +#endif