first commit

Makefile

@@ -0,0 +1,84 @@
+LIBNAME := $(shell basename $$(pwd))
+MAJOR := 1
+MINOR := 0.0
+
+UNAME_S := $(shell uname -s)
+
+ifeq ($(UNAME_S),Darwin)
+	LINKERNAME := $(LIBNAME).dylib
+	SONAME := $(LIBNAME).$(MAJOR).dylib
+	REALNAME := $(LINKERNAME)
+else
+	LINKERNAME := $(LIBNAME).so
+	SONAME := $(LINKERNAME).$(MAJOR)
+	REALNAME := $(SONAME).$(MINOR)
+endif
+
+PREFIX ?= /usr/local
+BINDIR ?= $(PREFIX)/bin
+CONFIGDIR ?= $(PREFIX)/etc
+INCLUDEDIR ?= $(PREFIX)/include
+LIBDIR ?= $(PREFIX)/lib
+DATADIR ?= $(PREFIX)/share
+MANDIR ?= $(DATADIR)/man
+DOCDIR ?= $(DATADIR)/$(LIBNAME)/doc
+
+SRCS := $(wildcard *.cpp)
+OBJS := $(subst .cpp,.o,$(SRCS))
+DEPS := $(subst .cpp,.d,$(SRCS))
+HDRS := $(filter-out $(LIBNAME).hpp,$(wildcard *.hpp))
+
+CXX ?= g++
+
+CXXFLAGS := $(CXXFLAGS) -Wshadow -Wall -Wpedantic -Wextra -g -fno-strict-aliasing -std=c++17 -fPIC
+ifeq ($(DEBUG),1)
+	CXXFLAGS += -D DEBUG -O0
+else
+	CXXFLAGS += -D NDEBUG -O3
+endif
+
+LDLIBS :=
+
+RM := /bin/rm -f
+INSTALL := /usr/bin/install -c
+
+.PHONY: all clean install
+
+all: $(REALNAME)
+
+$(REALNAME): $(OBJS) $(DEPS)
+ifeq ($(UNAME_S),Darwin)
+	$(CXX) -dynamiclib -o $(REALNAME) -current_version $(MAJOR) -compatibility_version $(MINOR) $(LDFLAGS) $(LDLIBS) $(OBJS)
+else
+	$(CXX) -g -shared -Wl,-soname,$(SONAME) -o $(REALNAME) $(LDFLAGS) $(LDLIBS) $(OBJS)
+endif
+
+%.o: %.cpp %.d Makefile
+	$(CXX) $(CXXFLAGS) -MMD -MP -MT $@ -MF $*.d -c $<
+
+-include *.d
+
+%.d: ;
+
+$(LIBNAME).hpp: $(HDRS)
+	@echo updating $(LIBNAME).hpp
+	@cp /dev/null $(LIBNAME).hpp
+	@for h in $(HDRS); \
+	do \
+		cat $$h >> $(LIBNAME).hpp; \
+	done
+
+clean:
+	$(RM) $(OBJS) $(DEPS) $(REALNAME) $(LIBNAME).hpp
+
+install: $(REALNAME) $(LIBNAME).hpp
+	$(INSTALL) -d $(LIBDIR)
+	$(INSTALL) -m 644 $(REALNAME) $(LIBDIR)
+	$(INSTALL) -d $(INCLUDEDIR)
+	$(INSTALL) -m 644 $(LIBNAME).hpp $(INCLUDEDIR)
+ifeq ($(UNAME_S),Darwin)
+	cd $(LIBDIR) && ln -sf $(REALNAME) $(SONAME)
+else
+	ldconfig
+	cd $(LIBDIR) && ln -sf $(SONAME) $(LINKERNAME)
+endif

ScreensaverPlugin.cpp

@@ -0,0 +1,56 @@
+//
+// ScreensaverPlugin.cpp
+// tmp
+//
+// Created by Bob Polis at 2020-10-26
+// Copyright (c) 2020 SwiftCoder. All rights reserved.
+//
+
+#include "ScreensaverPlugin.hpp"
+
+ScreensaverPlugin::ScreensaverPlugin(cairo_t* context, const cairo_rectangle_t& rect)
+    : _c {context}, _r {rect}, _x_dist {rect.x, rect.width}, _y_dist {rect.y, rect.height} {
+
+}
+
+void ScreensaverPlugin::make_black() {
+    cairo_set_source_rgb(_c, 0, 0, 0);
+    cairo_rectangle(_c, 0, 0, _r.width, _r.height);
+    cairo_fill(_c);
+}
+
+cairo_rectangle_t ScreensaverPlugin::random_rect() {
+    cairo_rectangle_t rect;
+    double v1, v2;
+    v1 = random_x();
+    v2 = random_x();
+    if (v1 < v2) {
+        rect.x = v1;
+        rect.width = v2 - v1;
+    } else {
+        rect.x = v2;
+        rect.width = v1 - v2;
+    }
+    v1 = random_y();
+    v2 = random_y();
+    if (v1 < v2) {
+        rect.y = v1;
+        rect.height = v2 - v1;
+    } else {
+        rect.y = v2;
+        rect.height = v1 - v2;
+    }
+    return rect;
+}
+
+double ScreensaverPlugin::random_x() {
+    return _x_dist(_eng);
+}
+
+double ScreensaverPlugin::random_y() {
+    return _y_dist(_eng);
+}
+
+double ScreensaverPlugin::random01() {
+    return _01_dist(_eng);
+}

ScreensaverPlugin.hpp

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+//
+// ScreensaverPlugin.hpp
+// screensaver
+//
+// Created by Bob Polis at 2020-10-26
+// Copyright (c) 2020 SwiftCoder. All rights reserved.
+//
+
+#ifndef _ScreensaverPlugin_H_
+#define _ScreensaverPlugin_H_
+
+#include <cairo/cairo.h>
+#include <random>
+
+class ScreensaverPlugin {
+    public:
+        ScreensaverPlugin(cairo_t* context, const cairo_rectangle_t& rect);
+        virtual ~ScreensaverPlugin() = default;
+
+        virtual void draw_frame() = 0;
+        virtual int fps() const = 0;
+
+    protected:
+        cairo_t* _c;
+        cairo_rectangle_t _r;
+        std::random_device _dev;
+        std::default_random_engine _eng {_dev()};
+        std::uniform_real_distribution<> _01_dist {};
+        std::uniform_real_distribution<> _x_dist;
+        std::uniform_real_distribution<> _y_dist;
+
+        void make_black();
+        cairo_rectangle_t random_rect();
+        double random_x();
+        double random_y();
+        double random01();
+};
+
+#endif // _ScreensaverPlugin_H_