From c807010554ca9b9e4432a5b075238acdb789536a Mon Sep 17 00:00:00 2001
From: Hermet Park <chuneon.park@samsung.com>
Date: Thu, 22 Oct 2020 13:36:29 +0900
Subject: [PATCH] examples FillRule: added shape::fillRule() example

one shape shows Winding, the other one shows EvenOdd.
---
 inc/thorvg.h              |   2 +-
 src/examples/FillRule.cpp | 141 ++++++++++++++++++++++++++++++++++++++
 src/examples/meson.build  |   1 +
 3 files changed, 143 insertions(+), 1 deletion(-)
 create mode 100644 src/examples/FillRule.cpp

diff --git a/inc/thorvg.h b/inc/thorvg.h
index 00e0163c..d6c3c214 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -245,7 +245,7 @@ public:
     //Getters
     uint32_t pathCommands(const PathCommand** cmds) const noexcept;
     uint32_t pathCoords(const Point** pts) const noexcept;
-    Result fill(uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a) const noexcept;
+    Result fill(uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a) const noexcept;   //TODO: => fillColor
     const Fill* fill() const noexcept;
     FillRule fillRule() const noexcept;
 
diff --git a/src/examples/FillRule.cpp b/src/examples/FillRule.cpp
new file mode 100644
index 00000000..57735432
--- /dev/null
+++ b/src/examples/FillRule.cpp
@@ -0,0 +1,141 @@
+#include "Common.h"
+
+/************************************************************************/
+/* Drawing Commands                                                     */
+/************************************************************************/
+
+void tvgDrawCmds(tvg::Canvas* canvas)
+{
+    if (!canvas) return;
+
+    //Star
+    auto shape1 = tvg::Shape::gen();
+    shape1->moveTo(186, 34);
+    shape1->lineTo(307, 365);
+    shape1->lineTo(26, 161);
+    shape1->lineTo(374, 160);
+    shape1->lineTo(97, 365);
+    shape1->close();
+    shape1->fill(255, 255, 255, 255);
+    shape1->fill(tvg::FillRule::Winding);  //Fill all winding shapes
+
+    if (canvas->push(move(shape1)) != tvg::Result::Success) return;
+
+    //Star 2
+    auto shape2 = tvg::Shape::gen();
+    shape2->moveTo(536, 334);
+    shape2->lineTo(657, 665);
+    shape2->lineTo(376, 461);
+    shape2->lineTo(724, 460);
+    shape2->lineTo(447, 665);
+    shape2->close();
+    shape2->fill(255, 255, 255, 255);
+    shape2->fill(tvg::FillRule::EvenOdd); //Fill polygons with even odd pattern
+
+    if (canvas->push(move(shape2)) != tvg::Result::Success) return;
+}
+
+/************************************************************************/
+/* Sw Engine Test Code                                                  */
+/************************************************************************/
+
+static unique_ptr<tvg::SwCanvas> swCanvas;
+
+void tvgSwTest(uint32_t* buffer)
+{
+    //Create a Canvas
+    swCanvas = tvg::SwCanvas::gen();
+    swCanvas->target(buffer, WIDTH, WIDTH, HEIGHT, tvg::SwCanvas::ARGB8888);
+
+    /* Push the shape into the Canvas drawing list
+       When this shape is into the canvas list, the shape could update & prepare
+       internal data asynchronously for coming rendering.
+       Canvas keeps this shape node unless user call canvas->clear() */
+    tvgDrawCmds(swCanvas.get());
+}
+
+void drawSwView(void* data, Eo* obj)
+{
+    if (swCanvas->draw() == tvg::Result::Success) {
+        swCanvas->sync();
+    }
+}
+
+
+/************************************************************************/
+/* GL Engine Test Code                                                  */
+/************************************************************************/
+
+static unique_ptr<tvg::GlCanvas> glCanvas;
+
+void initGLview(Evas_Object *obj)
+{
+    static constexpr auto BPP = 4;
+
+    //Create a Canvas
+    glCanvas = tvg::GlCanvas::gen();
+    glCanvas->target(nullptr, WIDTH * BPP, WIDTH, HEIGHT);
+
+    /* Push the shape into the Canvas drawing list
+       When this shape is into the canvas list, the shape could update & prepare
+       internal data asynchronously for coming rendering.
+       Canvas keeps this shape node unless user call canvas->clear() */
+    tvgDrawCmds(glCanvas.get());
+}
+
+void drawGLview(Evas_Object *obj)
+{
+    auto gl = elm_glview_gl_api_get(obj);
+    gl->glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+    gl->glClear(GL_COLOR_BUFFER_BIT);
+
+    if (glCanvas->draw() == tvg::Result::Success) {
+        glCanvas->sync();
+    }
+}
+
+
+/************************************************************************/
+/* Main Code                                                            */
+/************************************************************************/
+
+int main(int argc, char **argv)
+{
+    tvg::CanvasEngine tvgEngine = tvg::CanvasEngine::Sw;
+
+    if (argc > 1) {
+        if (!strcmp(argv[1], "gl")) tvgEngine = tvg::CanvasEngine::Gl;
+    }
+
+    //Initialize ThorVG Engine
+    if (tvgEngine == tvg::CanvasEngine::Sw) {
+        cout << "tvg engine: software" << endl;
+    } else {
+        cout << "tvg engine: opengl" << endl;
+    }
+
+    //Threads Count
+    auto threads = std::thread::hardware_concurrency();
+
+    //Initialize ThorVG Engine
+    if (tvg::Initializer::init(tvgEngine, threads) == tvg::Result::Success) {
+
+        elm_init(argc, argv);
+
+        if (tvgEngine == tvg::CanvasEngine::Sw) {
+            createSwView();
+        } else {
+            createGlView();
+        }
+
+        elm_run();
+        elm_shutdown();
+
+        //Terminate ThorVG Engine
+        tvg::Initializer::term(tvgEngine);
+
+    } else {
+        cout << "engine is not supported" << endl;
+    }
+    return 0;
+}
diff --git a/src/examples/meson.build b/src/examples/meson.build
index 05639111..43ad4fa1 100644
--- a/src/examples/meson.build
+++ b/src/examples/meson.build
@@ -9,6 +9,7 @@ source_file = [
     'CustomTransform.cpp',
     'DirectUpdate.cpp',
     'Duplicate.cpp',
+    'FillRule.cpp',
     'GradientTransform.cpp',
     'LinearGradient.cpp',
     'MultiCanvas.cpp',