svg: изображение

.gitignore

@@ -5,3 +5,4 @@
 /x64
 /unittest.vcxproj.filters
 /unittest.vcxproj.user
+/unittest.sln

cs-lab34.vcxproj

@@ -129,8 +129,13 @@
   <ItemGroup>
     <ClCompile Include="histogram.cpp" />
     <ClCompile Include="main.cpp" />
+    <ClCompile Include="svg.cpp" />
     <ClCompile Include="text.cpp" />
   </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="histogram_internal.h" />
+    <ClInclude Include="svg.h" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>

main.cpp

@@ -3,6 +3,7 @@
 #include <string>
 #include "histogram.h"
 #include "text.h"
+#include "svg.h"
 using namespace std;
 struct Input {
     vector<double> numbers;
@@ -32,9 +33,8 @@ int main()
 {
     const size_t SCREEN_WIDTH = 80;
     const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
-
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins, MAX_ASTERISK, in.bin_count);
+    show_histogram_svg(bins);
     return 0;
 }

svg.cpp

@@ -0,0 +1,61 @@
+#include <iostream>
+#include <vector>
+#include <string>
+using namespace std;
+
+void
+svg_begin(double width, double height) {
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' ";
+    cout << "height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end() {
+    cout << "</svg>\n";
+}
+
+void
+svg_text(double left, double baseline, string text) {
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+
+void
+svg_rect(double x, double y, double width, double height, string stroke, string fill) {
+    cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "' />";
+}
+
+
+
+void
+show_histogram_svg(const vector<double>& bins) {
+    const auto IMAGE_WIDTH = 400;
+    const auto IMAGE_HEIGHT = 300;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+    const auto BLOCK_WIDTH = 10;
+    const auto MAX_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH);
+
+    double max_count = (bins[0] * BLOCK_WIDTH);
+    for (double bin : bins) {
+        if ((bin * BLOCK_WIDTH) > max_count) {
+            max_count = (bin * BLOCK_WIDTH);
+        }
+    }
+
+    svg_begin(400, 300);
+    double top = 0;
+    for (double bin : bins) {
+        const double bin_width = MAX_WIDTH * ((BLOCK_WIDTH * bin) / max_count);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "blue", "#aaffaa");
+        top += BIN_HEIGHT;
+    }
+    svg_end();
+}
+

svg.h

@@ -0,0 +1,3 @@
+#pragma once
+#include <vector>
+void show_histogram_svg(const std::vector<double>& bins);

text.cpp

@@ -1,10 +1,11 @@
 #include "text.h"
+#include "svg.h"
 #include <string>
 #include <iostream>
 using namespace std;
 
 void
-show_histogram_text(const vector<double>& bins, size_t MAX_ASTERISK, size_t bin_count) {
+show_histogram_svg(const vector<double>& bins, size_t MAX_ASTERISK, size_t bin_count) {
     double max_count = bins[0];
     for (double x : bins) {
         if (x > max_count) {