From f7b4cc602b9a646fbc66f3f17d6bb9c20efc3ead Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Sun, 24 Jan 2021 18:44:56 +0100
Subject: Initial commit
---
.../cpp/cpp_cairo/Cairo Resources.txt | 6 +
upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.sln | 20 +++
upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.vcxproj | 93 +++++++++++
.../clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.cpp | 133 +++++++++++++++
.../clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.hpp | 59 +++++++
.../clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.o | Bin 0 -> 226800 bytes
.../clipper-6.4.2/cpp/cpp_cairo/libcairo-2.lib | Bin 0 -> 83700 bytes
upstream/clipper-6.4.2/cpp/cpp_cairo/main.cpp | 182 +++++++++++++++++++++
8 files changed, 493 insertions(+)
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/Cairo Resources.txt
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.sln
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.vcxproj
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.cpp
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.hpp
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.o
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/libcairo-2.lib
create mode 100644 upstream/clipper-6.4.2/cpp/cpp_cairo/main.cpp
(limited to 'upstream/clipper-6.4.2/cpp/cpp_cairo')
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/Cairo Resources.txt b/upstream/clipper-6.4.2/cpp/cpp_cairo/Cairo Resources.txt
new file mode 100644
index 0000000..e868eec
--- /dev/null
+++ b/upstream/clipper-6.4.2/cpp/cpp_cairo/Cairo Resources.txt
@@ -0,0 +1,6 @@
+http://cairographics.org/
+
+The Windows dynamic linked libraries necessary to run Cairo can be downloaded from
+http://www.gtk.org/download/win32.php
+All the dlls listed under the heading "Required third party dependencies" are
+required except gettext-runtime.dll.
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.sln b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.sln
new file mode 100644
index 0000000..651e81a
--- /dev/null
+++ b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.sln
@@ -0,0 +1,20 @@
+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual C++ Express 2010
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "cairo", "cairo.vcxproj", "{6AFBCA2B-9262-6D28-7506-E13747347388}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Win32 = Debug|Win32
+ Release|Win32 = Release|Win32
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {6AFBCA2B-9262-6D28-7506-E13747347388}.Debug|Win32.ActiveCfg = Debug|Win32
+ {6AFBCA2B-9262-6D28-7506-E13747347388}.Debug|Win32.Build.0 = Debug|Win32
+ {6AFBCA2B-9262-6D28-7506-E13747347388}.Release|Win32.ActiveCfg = Release|Win32
+ {6AFBCA2B-9262-6D28-7506-E13747347388}.Release|Win32.Build.0 = Release|Win32
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+EndGlobal
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.vcxproj b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.vcxproj
new file mode 100644
index 0000000..9816ce1
--- /dev/null
+++ b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo.vcxproj
@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+ <ItemGroup Label="ProjectConfigurations">
+ <ProjectConfiguration Include="Debug|Win32">
+ <Configuration>Debug</Configuration>
+ <Platform>Win32</Platform>
+ </ProjectConfiguration>
+ <ProjectConfiguration Include="Release|Win32">
+ <Configuration>Release</Configuration>
+ <Platform>Win32</Platform>
+ </ProjectConfiguration>
+ </ItemGroup>
+ <PropertyGroup Label="Globals">
+ <Keyword>Win32Proj</Keyword>
+ </PropertyGroup>
+ <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+ <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+ <ConfigurationType>Application</ConfigurationType>
+ <UseDebugLibraries>true</UseDebugLibraries>
+ <CharacterSet>Unicode</CharacterSet>
+ </PropertyGroup>
+ <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+ <ConfigurationType>Application</ConfigurationType>
+ <UseDebugLibraries>false</UseDebugLibraries>
+ </PropertyGroup>
+ <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+ <ImportGroup Label="ExtensionSettings">
+ </ImportGroup>
+ <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+ <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+ </ImportGroup>
+ <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+ <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+ </ImportGroup>
+ <PropertyGroup Label="UserMacros" />
+ <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+ <LinkIncremental>true</LinkIncremental>
+ <IncludePath>C:\Program Files %28x86%29\Borland\Clipper\PreReleaseTesting\cpp\cairo_src;$(IncludePath)</IncludePath>
+ <SourcePath>C:\Program Files %28x86%29\Borland\Clipper\PreReleaseTesting\cpp\cairo_src;C:\Program Files %28x86%29\Borland\graphics32\Examples\Vcl\Drawing\Clipper\PreReleaseTesting\cpp\cairo_src;$(SourcePath)</SourcePath>
+ </PropertyGroup>
+ <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+ <LinkIncremental>true</LinkIncremental>
+ </PropertyGroup>
+ <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+ <ClCompile>
+ <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+ <AdditionalIncludeDirectories>C:\Program Files (x86)\Borland\graphics32\Examples\Vcl\Drawing\Clipper\PreReleaseTesting\cpp\cairo_src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+ <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+ <WarningLevel>Level3</WarningLevel>
+ <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+ <Optimization>Disabled</Optimization>
+ <UseUnicodeForAssemblerListing>
+ </UseUnicodeForAssemblerListing>
+ </ClCompile>
+ <Link>
+ <TargetMachine>MachineX86</TargetMachine>
+ <GenerateDebugInformation>true</GenerateDebugInformation>
+ <SubSystem>Windows</SubSystem>
+ </Link>
+ </ItemDefinitionGroup>
+ <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+ <ClCompile>
+ <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+ <AdditionalIncludeDirectories>C:\Program Files (x86)\Borland\graphics32\Examples\Vcl\Drawing\Clipper\PreReleaseTesting\cpp\cairo_src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+ <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+ <WarningLevel>Level3</WarningLevel>
+ <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+ </ClCompile>
+ <Link>
+ <TargetMachine>MachineX86</TargetMachine>
+ <GenerateDebugInformation>true</GenerateDebugInformation>
+ <SubSystem>Windows</SubSystem>
+ <EnableCOMDATFolding>true</EnableCOMDATFolding>
+ <OptimizeReferences>true</OptimizeReferences>
+ </Link>
+ </ItemDefinitionGroup>
+ <ItemGroup>
+ <ClCompile Include="..\clipper.cpp" />
+ <ClCompile Include="cairo_clipper.cpp" />
+ <ClCompile Include="main.cpp" />
+ </ItemGroup>
+ <ItemGroup>
+ <ClInclude Include="..\cairo_src\cairo.h" />
+ <ClInclude Include="..\clipper.hpp" />
+ <ClInclude Include="cairo_clipper.hpp" />
+ </ItemGroup>
+ <ItemGroup>
+ <Library Include="libcairo-2.lib" />
+ </ItemGroup>
+ <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+ <ImportGroup Label="ExtensionTargets">
+ </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.cpp b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.cpp
new file mode 100644
index 0000000..72d5930
--- /dev/null
+++ b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.cpp
@@ -0,0 +1,133 @@
+/*******************************************************************************
+* *
+* Author : Angus Johnson *
+* Version : 1.1 *
+* Date : 4 April 2011 *
+* Copyright : Angus Johnson 2010-2011 *
+* *
+* License: *
+* Use, modification & distribution is subject to Boost Software License Ver 1. *
+* http://www.boost.org/LICENSE_1_0.txt *
+* *
+* Modified by Mike Owens to support coordinate transformation *
+*******************************************************************************/
+
+#include <stdexcept>
+#include <cmath>
+#include <iostream>
+#include <cairo.h>
+#include "clipper.hpp"
+#include "cairo_clipper.hpp"
+
+namespace ClipperLib {
+ namespace cairo {
+
+ namespace {
+
+ inline cInt Round(double val)
+ {
+ if ((val < 0)) return (cInt)(val - 0.5); else return (cInt)(val + 0.5);
+ }
+
+ void transform_point(cairo_t* pen, Transform transform, cInt* x, cInt* y)
+ {
+ double _x = (double)*x, _y = (double)*y;
+ switch (transform)
+ {
+ case tDeviceToUser:
+ cairo_device_to_user(pen, &_x, &_y);
+ break;
+ case tUserToDevice:
+ cairo_user_to_device(pen, &_x, &_y);
+ break;
+ default:
+ ;
+ }
+ *x = Round(_x); *y = Round(_y);
+ }
+ }
+
+ void cairo_to_clipper(cairo_t* cr,
+ Paths &pg,
+ int scaling_factor,
+ Transform transform)
+ {
+ if (scaling_factor > 8 || scaling_factor < 0)
+ throw clipperCairoException("cairo_to_clipper: invalid scaling factor");
+ double scaling = std::pow((double)10, scaling_factor);
+
+ pg.clear();
+ cairo_path_t *path = cairo_copy_path_flat(cr);
+
+ int poly_count = 0;
+ for (int i = 0; i < path->num_data; i += path->data[i].header.length) {
+ if( path->data[i].header.type == CAIRO_PATH_CLOSE_PATH) poly_count++;
+ }
+
+ pg.resize(poly_count);
+ int i = 0, pc = 0;
+ while (pc < poly_count)
+ {
+ int vert_count = 1;
+ int j = i;
+ while(j < path->num_data && path->data[j].header.type != CAIRO_PATH_CLOSE_PATH)
+ {
+ if (path->data[j].header.type == CAIRO_PATH_LINE_TO)
+ vert_count++;
+ j += path->data[j].header.length;
+ }
+ pg[pc].resize(vert_count);
+ if (path->data[i].header.type != CAIRO_PATH_MOVE_TO) {
+ pg.resize(pc);
+ break;
+ }
+ pg[pc][0].X = Round(path->data[i+1].point.x *scaling);
+ pg[pc][0].Y = Round(path->data[i+1].point.y *scaling);
+ if (transform != tNone)
+ transform_point(cr, transform, &pg[pc][0].X, &pg[pc][0].Y);
+
+ i += path->data[i].header.length;
+
+ j = 1;
+ while (j < vert_count && i < path->num_data && path->data[i].header.type == CAIRO_PATH_LINE_TO) {
+ pg[pc][j].X = Round(path->data[i+1].point.x *scaling);
+ pg[pc][j].Y = Round(path->data[i+1].point.y *scaling);
+ if (transform != tNone)
+ transform_point(cr, transform, &pg[pc][j].X, &pg[pc][j].Y);
+ j++;
+ i += path->data[i].header.length;
+ }
+ pc++;
+ i += path->data[i].header.length;
+ }
+ cairo_path_destroy(path);
+ }
+ //--------------------------------------------------------------------------
+
+ void clipper_to_cairo(const Paths &pg, cairo_t* cr, int scaling_factor, Transform transform)
+ {
+ if (scaling_factor > 8 || scaling_factor < 0)
+ throw clipperCairoException("clipper_to_cairo: invalid scaling factor");
+ double scaling = std::pow((double)10, scaling_factor);
+ for (size_t i = 0; i < pg.size(); ++i)
+ {
+ size_t sz = pg[i].size();
+ if (sz < 3)
+ continue;
+ cairo_new_sub_path(cr);
+ //std::cerr << "sub path";
+ for (size_t j = 0; j < sz; ++j) {
+ cInt x = pg[i][j].X, y = pg[i][j].Y;
+ if (transform != tNone)
+ transform_point(cr, transform, &x, &y);
+ //std::cerr << " (" << (double)x / scaling << "," << (double)y / scaling << ")";
+ cairo_line_to(cr, (double)x / scaling, (double)y / scaling);
+ }
+ //std::cerr << std::endl;
+ cairo_close_path(cr);
+ }
+ }
+ //--------------------------------------------------------------------------
+
+ }
+}
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.hpp b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.hpp
new file mode 100644
index 0000000..7c52dfd
--- /dev/null
+++ b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.hpp
@@ -0,0 +1,59 @@
+/*******************************************************************************
+* *
+* Author : Angus Johnson *
+* Version : 1.1 *
+* Date : 4 April 2011 *
+* Copyright : Angus Johnson 2010-2011 *
+* *
+* License: *
+* Use, modification & distribution is subject to Boost Software License Ver 1. *
+* http://www.boost.org/LICENSE_1_0.txt *
+* *
+* Modified by Mike Owens to support coordinate transformation *
+*******************************************************************************/
+
+#ifndef CLIPPER_CAIRO_CLIPPER_HPP
+#define CLIPPER_CAIRO_CLIPPER_HPP
+
+#include "clipper.hpp"
+
+typedef struct _cairo cairo_t;
+
+namespace ClipperLib {
+ namespace cairo {
+
+ enum Transform {
+ tNone,
+ tUserToDevice,
+ tDeviceToUser
+ };
+
+//nb: Since Clipper only accepts integer coordinates, fractional values have to
+//be scaled up and down when being passed to and from Clipper. This is easily
+//accomplished by setting the scaling factor (10^x) in the following functions.
+//When scaling, remember that on most platforms, integer is only a 32bit value.
+ void cairo_to_clipper(cairo_t* cr,
+ ClipperLib::Paths &pg,
+ int scaling_factor = 0,
+ Transform transform = tNone);
+
+ void clipper_to_cairo(const ClipperLib::Paths &pg,
+ cairo_t* cr,
+ int scaling_factor = 0,
+ Transform transform = tNone);
+ }
+
+ class clipperCairoException : public std::exception
+ {
+ public:
+ clipperCairoException(const char* description)
+ throw(): std::exception(), m_description (description) {}
+ virtual ~clipperCairoException() throw() {}
+ virtual const char* what() const throw() {return m_description.c_str();}
+ private:
+ std::string m_description;
+ };
+}
+
+#endif
+
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.o b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.o
new file mode 100644
index 0000000..c7ca888
Binary files /dev/null and b/upstream/clipper-6.4.2/cpp/cpp_cairo/cairo_clipper.o differ
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/libcairo-2.lib b/upstream/clipper-6.4.2/cpp/cpp_cairo/libcairo-2.lib
new file mode 100644
index 0000000..9be9bc1
Binary files /dev/null and b/upstream/clipper-6.4.2/cpp/cpp_cairo/libcairo-2.lib differ
diff --git a/upstream/clipper-6.4.2/cpp/cpp_cairo/main.cpp b/upstream/clipper-6.4.2/cpp/cpp_cairo/main.cpp
new file mode 100644
index 0000000..b196a22
--- /dev/null
+++ b/upstream/clipper-6.4.2/cpp/cpp_cairo/main.cpp
@@ -0,0 +1,182 @@
+//---------------------------------------------------------------------------
+
+#include <windows.h>
+#include <cstring>
+#include <cmath>
+#include <sstream>
+#pragma hdrstop
+
+#include "clipper.hpp"
+#include "cairo.h"
+#include "cairo-win32.h"
+#include "cairo_clipper.hpp"
+//---------------------------------------------------------------------------
+
+int offsetVal;
+
+LRESULT CALLBACK WndProcedure(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+
+int CALLBACK wWinMain(HINSTANCE hInstance,
+ HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
+{
+ WCHAR* ClsName = L"CairoApp";
+ WCHAR* WndName = L"A Simple Cairo Clipper Demo";
+ offsetVal = 0;
+
+ MSG Msg;
+ HWND hWnd;
+ WNDCLASSEX WndClsEx;
+
+ // Create the application window
+ WndClsEx.cbSize = sizeof(WNDCLASSEX);
+ WndClsEx.style = CS_HREDRAW | CS_VREDRAW;
+ WndClsEx.lpfnWndProc = WndProcedure;
+ WndClsEx.cbClsExtra = 0;
+ WndClsEx.cbWndExtra = 0;
+ WndClsEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+ WndClsEx.hCursor = LoadCursor(NULL, IDC_ARROW);
+ WndClsEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
+ WndClsEx.lpszMenuName = NULL;
+ WndClsEx.lpszClassName = ClsName;
+ WndClsEx.hInstance = hInstance;
+ WndClsEx.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
+
+ // Register the application
+ RegisterClassEx(&WndClsEx);
+
+ // Create the window object
+ hWnd = CreateWindow(ClsName, WndName, WS_OVERLAPPEDWINDOW,
+ CW_USEDEFAULT, CW_USEDEFAULT, 400, 300,
+ NULL, NULL, hInstance, NULL);
+ if( !hWnd ) return 0;
+
+ ShowWindow(hWnd, SW_SHOWNORMAL);
+ UpdateWindow(hWnd);
+
+ while( GetMessage(&Msg, NULL, 0, 0) )
+ {
+ TranslateMessage(&Msg);
+ DispatchMessage(&Msg);
+ }
+ return Msg.wParam;
+}
+//------------------------------------------------------------------------------
+
+
+void OnPaint(HWND hWnd, HDC dc)
+{
+ RECT rec;
+ GetClientRect(hWnd, &rec);
+ cairo_surface_t* surface = cairo_win32_surface_create(dc);
+ cairo_t* cr = cairo_create(surface);
+
+ cairo_set_fill_rule(cr, CAIRO_FILL_RULE_WINDING);
+ cairo_set_line_width (cr, 2.0);
+
+ //fill background with white ...
+ cairo_rectangle(cr, 0, 0, rec.right, rec.bottom);
+ cairo_set_source_rgba(cr, 1, 1, 1, 1);
+ cairo_fill(cr);
+
+ using namespace ClipperLib;
+
+ const int scaling = 2;
+
+ Clipper clpr; //clipper class
+ Paths pg; //std::vector for polygon(s) storage
+
+ //create a circular pattern, add the path to clipper and then draw it ...
+ cairo_arc(cr, 170,110,70,0,2*3.1415926);
+ cairo_close_path(cr);
+ cairo::cairo_to_clipper(cr, pg, scaling);
+ clpr.AddPaths(pg, ptSubject, true);
+ cairo_set_source_rgba(cr, 0, 0, 1, 0.25);
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgba(cr, 0, 0, 0, 0.5);
+ cairo_stroke (cr);
+
+ //draw a star and another circle, add them to clipper and draw ...
+ cairo_move_to(cr, 60,110);
+ cairo_line_to (cr, 240,70);
+ cairo_line_to (cr, 110,210);
+ cairo_line_to (cr, 140,25);
+ cairo_line_to (cr, 230,200);
+ cairo_close_path(cr);
+ cairo_new_sub_path(cr);
+ cairo_arc(cr, 190,50,20,0,2*3.1415926);
+ cairo_close_path(cr);
+ cairo::cairo_to_clipper(cr, pg, scaling);
+ clpr.AddPaths(pg, ptClip, true);
+ cairo_set_source_rgba(cr, 1, 0, 0, 0.25);
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgba(cr, 0, 0, 0, 0.5);
+ cairo_stroke (cr);
+
+ clpr.Execute(ctIntersection, pg, pftNonZero, pftNonZero);
+ //now do something fancy with the returned polygons ...
+ OffsetPaths(pg, pg, offsetVal * std::pow((double)10,scaling), jtMiter, etClosed);
+
+ //finally copy the clipped path back to the cairo context and draw it ...
+ cairo::clipper_to_cairo(pg, cr, scaling);
+ cairo_set_source_rgba(cr, 1, 1, 0, 1);
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgba(cr, 0, 0, 0, 1);
+ cairo_stroke (cr);
+
+ cairo_text_extents_t extent;
+ cairo_set_font_size(cr,11);
+ std::stringstream ss;
+ ss << "Polygon offset = " << offsetVal << ". (Adjust with arrow keys)";
+ std::string s = ss.str();
+ cairo_text_extents(cr, s.c_str(), &extent);
+ cairo_move_to(cr, 10, rec.bottom - extent.height);
+ cairo_show_text(cr, s.c_str());
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (surface);
+}
+//------------------------------------------------------------------------------
+
+LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
+{
+ PAINTSTRUCT ps;
+ HDC Handle;
+
+ switch(Msg)
+ {
+ case WM_DESTROY:
+ PostQuitMessage(WM_QUIT);
+ return 0;
+
+ case WM_PAINT:
+ Handle = BeginPaint(hWnd, &ps);
+ OnPaint(hWnd, Handle);
+ EndPaint(hWnd, &ps);
+ return 0;
+
+ case WM_KEYDOWN:
+ switch(wParam)
+ {
+ case VK_ESCAPE:
+ PostQuitMessage(0);
+ return 0;
+ case VK_RIGHT:
+ case VK_UP:
+ if (offsetVal < 20) offsetVal++;
+ InvalidateRect(hWnd, 0, false);
+ return 0;
+ case VK_LEFT:
+ case VK_DOWN:
+ if (offsetVal > -20) offsetVal--;
+ InvalidateRect(hWnd, 0, false);
+ return 0;
+ default:
+ return DefWindowProc(hWnd, Msg, wParam, lParam);
+ }
+
+ default:
+ return DefWindowProc(hWnd, Msg, wParam, lParam);
+ }
+}
+//---------------------------------------------------------------------------
+
--
cgit