sw_engine stroke: stabilizing line drawing.

Also added StrokeLine test

Change-Id: I91143039823d744bf9287534227927556a2f51e1

.gitignore

@@ -13,3 +13,4 @@ testScene
 testTransform
 testSceneTransform
 testStroke
+testStrokeLine

src/lib/sw_engine/tvgSwRle.cpp

@@ -612,7 +612,7 @@ static bool _decomposeOutline(RleWorker& rw)
                 goto close;
             }
         }
-        _lineTo(rw, UPSCALE(outline->pts[first]));
+        _lineTo(rw, start);
     close:
        first = last + 1;
     }

src/lib/sw_engine/tvgSwShape.cpp

@@ -316,6 +316,7 @@ bool shapeGenOutline(const Shape& shape, SwShape& sdata)
     auto outline = sdata.outline;
     if (!outline) outline = static_cast<SwOutline*>(calloc(1, sizeof(SwOutline)));
     assert(outline);
+    outline->opened = true;
 
     _growOutlinePoint(*outline, outlinePtsCnt);
     _growOutlineContour(*outline, outlineCntrsCnt);

src/lib/sw_engine/tvgSwStroke.cpp

@@ -635,15 +635,14 @@ static void _addReverseLeft(SwStroke& stroke, bool opened)
         } else {
             //switch begin/end tags if necessary
             auto ttag = dstTag[0] & (SW_STROKE_TAG_BEGIN | SW_STROKE_TAG_END);
-            if (ttag == (SW_STROKE_TAG_BEGIN || SW_STROKE_TAG_END)) {
-                dstTag[0] ^= (SW_STROKE_TAG_BEGIN || SW_STROKE_TAG_END);
-            }
+            if (ttag == SW_STROKE_TAG_BEGIN || ttag == SW_STROKE_TAG_END)
+              dstTag[0] ^= (SW_STROKE_TAG_BEGIN | SW_STROKE_TAG_END);
         }
 
         --srcPt;
         --srcTag;
-        --dstPt;
-        --dstTag;
+        ++dstPt;
+        ++dstTag;
     }
 
     left->ptsCnt = left->start;

test/makefile

@@ -11,3 +11,4 @@ all:
 	gcc -o testTransform testTransform.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
 	gcc -o testSceneTransform testSceneTransform.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
 	gcc -o testStroke testStroke.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
+	gcc -o testStrokeLine testStrokeLine.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`

test/testStrokeLine.cpp

@@ -0,0 +1,101 @@
+#include <tizenvg.h>
+#include <Elementary.h>
+
+using namespace std;
+
+#define WIDTH 800
+#define HEIGHT 800
+
+static uint32_t buffer[WIDTH * HEIGHT];
+
+void tvgtest()
+{
+    //Initialize TizenVG Engine
+    tvg::Engine::init();
+
+    //Create a Canvas
+    auto canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
+
+    for (int i = 0; i < 10; ++i) {
+        auto shape = tvg::Shape::gen();
+        shape->moveTo(50, 50 + (25 * i));
+        shape->lineTo(750, 50 + (25 * i));
+        shape->stroke(255, 255, 255, 255);       //color: r, g, b, a
+        shape->stroke(i + 1);                    //stroke width
+        shape->stroke(tvg::StrokeCap::Round);    //default is Square
+        canvas->push(move(shape));
+    }
+
+    auto shape1 = tvg::Shape::gen();
+    shape1->moveTo(20, 350);
+    shape1->lineTo(250, 350);
+    shape1->lineTo(220, 500);
+    shape1->lineTo(70, 470);
+    shape1->lineTo(70, 330);
+    shape1->stroke(255, 0, 0, 255);
+    shape1->stroke(10);
+    shape1->stroke(tvg::StrokeJoin::Round);
+    shape1->stroke(tvg::StrokeCap::Round);
+    canvas->push(move(shape1));
+
+    auto shape2 = tvg::Shape::gen();
+    shape2->moveTo(270, 350);
+    shape2->lineTo(500, 350);
+    shape2->lineTo(470, 500);
+    shape2->lineTo(320, 470);
+    shape2->lineTo(320, 330);
+    shape2->stroke(255, 255, 0, 255);
+    shape2->stroke(10);
+    shape2->stroke(tvg::StrokeJoin::Bevel);
+    shape2->stroke(tvg::StrokeCap::Square);
+    canvas->push(move(shape2));
+
+    auto shape3 = tvg::Shape::gen();
+    shape3->moveTo(520, 350);
+    shape3->lineTo(750, 350);
+    shape3->lineTo(720, 500);
+    shape3->lineTo(570, 470);
+    shape3->lineTo(570, 330);
+    shape3->stroke(0, 255, 0, 255);
+    shape3->stroke(10);
+    shape3->stroke(tvg::StrokeJoin::Miter);
+    shape3->stroke(tvg::StrokeCap::Butt);
+    canvas->push(move(shape3));
+
+    canvas->draw();
+    canvas->sync();
+
+    //Terminate TizenVG Engine
+    tvg::Engine::term();
+}
+
+void
+win_del(void *data, Evas_Object *o, void *ev)
+{
+   elm_exit();
+}
+
+int main(int argc, char **argv)
+{
+    tvgtest();
+
+    //Show the result using EFL...
+    elm_init(argc, argv);
+
+    Eo* win = elm_win_util_standard_add(NULL, "TizenVG Test");
+    evas_object_smart_callback_add(win, "delete,request", win_del, 0);
+
+    Eo* img = evas_object_image_filled_add(evas_object_evas_get(win));
+    evas_object_image_size_set(img, WIDTH, HEIGHT);
+    evas_object_image_data_set(img, buffer);
+    evas_object_size_hint_weight_set(img, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
+    evas_object_show(img);
+
+    elm_win_resize_object_add(win, img);
+    evas_object_geometry_set(win, 0, 0, WIDTH, HEIGHT);
+    evas_object_show(win);
+
+    elm_run();
+    elm_shutdown();
+}