Text support

CMakeLists.txt

@@ -140,6 +140,9 @@ write_basic_package_version_file(
   VERSION ${MANIFOLD_VERSION}
   COMPATIBILITY SameMajorVersion
 )
+
+target_link_libraries(cross_section PUBLIC TextToPolygon)
+
 install(EXPORT manifoldTargets DESTINATION ${CMAKE_INSTALL_DATADIR}/manifold)
 configure_file(manifoldConfig.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/manifoldConfig.cmake @ONLY)
 install(FILES

manifoldDeps.cmake

@@ -37,6 +37,24 @@ else()
     endif()
 endif()
 
+FetchContent_Declare(
+  TextToPolygon
+  GIT_REPOSITORY https://github.com/SovereignShop/text-to-polygon.git
+  GIT_TAG 670e4a71ba3dd1de2f7edcf73f748ab4eeec3828
+)
+FetchContent_MakeAvailable(TextToPolygon)
+
+target_link_libraries(TextToPolygon
+    PRIVATE
+    freetype
+)
+
+target_include_directories(TextToPolygon PUBLIC
+  $<BUILD_INTERFACE:${texttopolygon_SOURCE_DIR}>
+  $<INSTALL_INTERFACE:include>
+)
+
+
 FetchContent_Declare(glm
     GIT_REPOSITORY https://github.com/g-truc/glm.git
     GIT_TAG b06b775c1c80af51a1183c0e167f9de3b2351a79

src/cross_section/include/cross_section.h

@@ -17,6 +17,7 @@
 #include <functional>
 #include <memory>
 #include <vector>
+#include "text_to_polygon.h"
 
 #include "glm/ext/matrix_float3x2.hpp"
 #include "glm/ext/vector_float2.hpp"
@@ -74,6 +75,7 @@ class CrossSection {
   CrossSection(const Polygons& contours,
                FillRule fillrule = FillRule::Positive);
   CrossSection(const Rect& rect);
+  static CrossSection Text(const std::string& fontFile, const std::string& text, u_int32_t pixelHeight, int interpRes);
   static CrossSection Square(const glm::vec2 dims, bool center = false);
   static CrossSection Circle(float radius, int circularSegments = 0);
   ///@}

src/cross_section/src/cross_section.cpp

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "cross_section.h"
+#include "text_to_polygon.h"
 
 #include "clipper2/clipper.core.h"
 #include "clipper2/clipper.h"
@@ -304,6 +305,19 @@ std::shared_ptr<const PathImpl> CrossSection::GetPaths() const {
   return paths_;
 }
 
+/**
+ * Renders text to a cross section.
+ *
+ * @param fontFile path to a .ttf font file.
+ * @param text Text to render as polygon
+ * @param pixelHeight freetype pixelHeight.
+ * @param interpRes Resolution of interpolation of curves.
+ */
+CrossSection CrossSection::Text(const std::string& fontFile, const std::string& text, u_int32_t pixelHeight, int interpRes) {
+  Polygons polys = TextToPolygon::textToPolygons(fontFile, text, pixelHeight, interpRes);
+  return CrossSection(polys, FillRule::NonZero);
+}
+
 /**
  * Constructs a square with the given XY dimensions. By default it is
  * positioned in the first quadrant, touching the origin. If any dimensions in