sw_engine: support gradient transformation properly

added testGradientTransform

Change-Id: I29037d08ce951e5ceb2eef31cb414efc25296417

.gitignore

@@ -16,3 +16,4 @@ testStroke
 testStrokeLine
 testLinearGradient
 testRadialGradient
+testGradientTransform

src/lib/sw_engine/tvgSwCommon.h

@@ -252,7 +252,7 @@ void shapeResetStroke(SwShape& shape, const Shape& sdata);
 bool shapeGenStrokeRle(SwShape& shape, const Shape& sdata, const SwSize& clip);
 void shapeFree(SwShape* shape);
 void shapeDelStroke(SwShape& shape);
-bool shapeGenFillColors(SwShape& shape, const Fill* fill);
+bool shapeGenFillColors(SwShape& shape, const Fill* fill, const RenderTransform* transform, bool ctable);
 void shapeResetFill(SwShape& shape, const Fill* fill);
 void shapeDelFill(SwShape& shape);
 
@@ -261,7 +261,7 @@ bool strokeParseOutline(SwStroke& stroke, const SwOutline& outline);
 SwOutline* strokeExportOutline(SwStroke& stroke);
 void strokeFree(SwStroke* stroke);
 
-bool fillGenColorTable(SwFill* fill, const Fill* fdata);
+bool fillGenColorTable(SwFill* fill, const Fill* fdata, const RenderTransform* transform, bool ctable);
 void fillReset(SwFill* fill, const Fill* fdata);
 void fillFree(SwFill* fill);
 void fillFetchLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len);

src/lib/sw_engine/tvgSwFill.cpp

@@ -88,13 +88,26 @@ static bool _updateColorTable(SwFill* fill, const Fill* fdata)
 }
 
 
-bool _prepareLinear(SwFill* fill, const LinearGradient* linear)
+bool _prepareLinear(SwFill* fill, const LinearGradient* linear, const RenderTransform* transform)
 {
     assert(fill && linear);
 
     float x1, x2, y1, y2;
     if (linear->linear(&x1, &y1, &x2, &y2) != Result::Success) return false;
 
+    if (transform) {
+        auto cx = (x2 - x1) * 0.5f + x1;
+        auto cy = (y2 - y1) * 0.5f + y1;
+        auto dx = x1 - cx;
+        auto dy = y1 - cy;
+        x1 = dx * transform->e11 + dy * transform->e12 + transform->e31;
+        y1 = dx * transform->e21 + dy * transform->e22 + transform->e32;
+        dx = x2 - cx;
+        dy = y2 - cy;
+        x2 = dx * transform->e11 + dy * transform->e12 + transform->e31;
+        y2 = dx * transform->e21 + dy * transform->e22 + transform->e32;
+    }
+
     fill->linear.dx = x2 - x1;
     fill->linear.dy = y2 - y1;
     fill->linear.len = fill->linear.dx * fill->linear.dx + fill->linear.dy * fill->linear.dy;
@@ -105,11 +118,11 @@ bool _prepareLinear(SwFill* fill, const LinearGradient* linear)
     fill->linear.dy /= fill->linear.len;
     fill->linear.offset = -fill->linear.dx * x1 - fill->linear.dy * y1;
 
-    return _updateColorTable(fill, linear);
+    return true;
 }
 
 
-bool _prepareRadial(SwFill* fill, const RadialGradient* radial)
+bool _prepareRadial(SwFill* fill, const RadialGradient* radial, const RenderTransform* transform)
 {
     assert(fill && radial);
 
@@ -117,10 +130,18 @@ bool _prepareRadial(SwFill* fill, const RadialGradient* radial)
     if (radial->radial(&fill->radial.cx, &fill->radial.cy, &radius) != Result::Success) return false;
     if (radius < FLT_EPSILON) return true;
 
+    if (transform) {
+        auto tx = fill->radial.cx * transform->e11 + fill->radial.cy * transform->e12 + transform->e31;
+        auto ty = fill->radial.cx * transform->e21 + fill->radial.cy * transform->e22 + transform->e32;
+        fill->radial.cx = tx;
+        fill->radial.cy = ty;
+        radius *= transform->e33;
+    }
+
     fill->radial.a = radius * radius;
     fill->radial.inv2a = pow(1 / (2 * fill->radial.a), 2);
 
-    return _updateColorTable(fill, radial);
+    return true;
 }
 
 
@@ -251,7 +272,7 @@ void fillFetchLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x,
 }
 
 
-bool fillGenColorTable(SwFill* fill, const Fill* fdata)
+bool fillGenColorTable(SwFill* fill, const Fill* fdata, const RenderTransform* transform, bool ctable)
 {
     if (!fill) return false;
 
@@ -259,10 +280,14 @@ bool fillGenColorTable(SwFill* fill, const Fill* fdata)
 
     fill->spread = fdata->spread();
 
+    if (ctable) {
+        if (!_updateColorTable(fill, fdata)) return false;
+    }
+
     if (fdata->id() == FILL_ID_LINEAR) {
-        return _prepareLinear(fill, static_cast<const LinearGradient*>(fdata));
+        return _prepareLinear(fill, static_cast<const LinearGradient*>(fdata), transform);
     } else if (fdata->id() == FILL_ID_RADIAL) {
-        return _prepareRadial(fill, static_cast<const RadialGradient*>(fdata));
+        return _prepareRadial(fill, static_cast<const RadialGradient*>(fdata), transform);
     }
 
     cout << "What type of gradient?!" << endl;

src/lib/sw_engine/tvgSwRenderer.cpp

@@ -113,11 +113,12 @@ void* SwRenderer::prepare(const Shape& sdata, void* data, const RenderTransform*
     }
 
     //Fill
-    if (flags & (RenderUpdateFlag::Gradient)) {
+    if (flags & (RenderUpdateFlag::Gradient | RenderUpdateFlag::Transform)) {
         auto fill = sdata.fill();
         if (fill) {
-            shapeResetFill(*shape, fill);
-            if (!shapeGenFillColors(*shape, fill)) return shape;
+            auto ctable = (flags & RenderUpdateFlag::Gradient) ? true : false;
+            if (ctable) shapeResetFill(*shape, fill);
+            if (!shapeGenFillColors(*shape, fill, transform, ctable)) return shape;
         } else {
             shapeDelFill(*shape);
         }

src/lib/sw_engine/tvgSwShape.cpp

@@ -347,9 +347,9 @@ static void _transformOutline(SwOutline* outline, const RenderTransform* transfo
     for(uint32_t i = 0; i < outline->ptsCnt; ++i) {
         auto dx = static_cast<float>(outline->pts[i].x >> 6);
         auto dy = static_cast<float>(outline->pts[i].y >> 6);
-        auto tx = dx * transform->e11 + dy * transform->e12 + transform->e13;
-        auto ty = dx * transform->e21 + dy * transform->e22 + transform->e23;
-        auto pt = Point{tx + transform->e31, ty + transform->e32};
+        auto tx = dx * transform->e11 + dy * transform->e12 + transform->e31;
+        auto ty = dx * transform->e21 + dy * transform->e22 + transform->e32;
+        auto pt = Point{tx, ty};
         outline->pts[i] = TO_SWPOINT(&pt);
     }
 }
@@ -740,11 +740,11 @@ bool shapeGenStrokeRle(SwShape& shape, const Shape& sdata, const SwSize& clip)
 }
 
 
-bool shapeGenFillColors(SwShape& shape, const Fill* fill)
+bool shapeGenFillColors(SwShape& shape, const Fill* fill, const RenderTransform* transform, bool ctable)
 {
     assert(fill);
 
-    fillGenColorTable(shape.fill, fill);
+    fillGenColorTable(shape.fill, fill, transform, ctable);
     return true;
 }
 

test/makefile

@@ -14,3 +14,4 @@ all:
 	gcc -o testStrokeLine testStrokeLine.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
 	gcc -o testLinearGradient testLinearGradient.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
 	gcc -o testRadialGradient testRadialGradient.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`
+	gcc -o testGradientTransform testGradientTransform.cpp -g -lstdc++ `pkg-config --cflags --libs elementary tizenvg`

test/testGradientTransform.cpp

@@ -0,0 +1,170 @@
+#include <tizenvg.h>
+#include <Elementary.h>
+
+using namespace std;
+
+#define WIDTH 800
+#define HEIGHT 800
+
+static uint32_t buffer[WIDTH * HEIGHT];
+unique_ptr<tvg::SwCanvas> canvas = nullptr;
+tvg::Shape* pShape = nullptr;
+tvg::Shape* pShape2 = nullptr;
+tvg::Shape* pShape3 = nullptr;
+
+void tvgtest()
+{
+    //Create a Canvas
+    canvas = tvg::SwCanvas::gen();
+    canvas->target(buffer, WIDTH, WIDTH, HEIGHT);
+
+    //Shape1
+    auto shape = tvg::Shape::gen();
+
+    /* Acquire shape pointer to access it again.
+       instead, you should consider not to interrupt this pointer life-cycle. */
+    pShape = shape.get();
+
+    shape->appendRect(-285, -300, 200, 200, 0);
+    shape->appendRect(-185, -200, 300, 300, 100);
+    shape->appendCircle(115, 100, 100, 100);
+    shape->appendCircle(115, 200, 170, 100);
+
+    //LinearGradient
+    auto fill = tvg::LinearGradient::gen();
+    fill->linear(-285, -300, 285, 300);
+
+    //Gradient Color Stops
+    tvg::Fill::ColorStop colorStops[3];
+    colorStops[0] = {0, 255, 0, 0, 255};
+    colorStops[1] = {0.5, 255, 255, 0, 255};
+    colorStops[2] = {1, 255, 255, 255, 255};
+
+    fill->colorStops(colorStops, 3);
+    shape->fill(move(fill));
+    shape->translate(385, 400);
+    canvas->push(move(shape));
+
+    //Shape2
+    auto shape2 = tvg::Shape::gen();
+    pShape2 = shape2.get();
+    shape2->appendRect(-50, -50, 100, 100, 0);
+    shape2->translate(400, 400);
+
+    //LinearGradient
+    auto fill2 = tvg::LinearGradient::gen();
+    fill2->linear(-50, -50, 50, 50);
+
+    //Gradient Color Stops
+    tvg::Fill::ColorStop colorStops2[2];
+    colorStops2[0] = {0, 0, 0, 0, 255};
+    colorStops2[1] = {1, 255, 255, 255, 255};
+
+    fill2->colorStops(colorStops2, 2);
+    shape2->fill(move(fill2));
+    canvas->push(move(shape2));
+
+    //Shape3
+    auto shape3 = tvg::Shape::gen();
+    pShape3 = shape3.get();
+
+    /* Look, how shape3's origin is different with shape2
+       The center of the shape is the anchor point for transformation. */
+    shape3->appendRect(100, 100, 150, 100, 20);
+
+    //RadialGradient
+    auto fill3 = tvg::RadialGradient::gen();
+    fill3->radial(175, 150, 75);
+
+    //Gradient Color Stops
+    tvg::Fill::ColorStop colorStops3[4];
+    colorStops3[0] = {0, 0, 127, 0, 127};
+    colorStops3[1] = {0.25, 0, 170, 170, 170};
+    colorStops3[2] = {0.5, 200, 0, 200, 200};
+    colorStops3[3] = {1, 255, 255, 255, 255};
+
+    fill3->colorStops(colorStops3, 4);
+
+    shape3->fill(move(fill3));
+    shape3->translate(400, 400);
+    canvas->push(move(shape3));
+
+    //Draw first frame
+    canvas->draw();
+    canvas->sync();
+}
+
+void transit_cb(Elm_Transit_Effect *effect, Elm_Transit* transit, double progress)
+{
+    /* Update shape directly.
+       You can update only necessary properties of this shape,
+       while retaining other properties. */
+
+    //Update Shape1
+    pShape->scale(1 - 0.75 * progress);
+    pShape->rotate(360 * progress);
+
+    //Update shape for drawing (this may work asynchronously)
+    canvas->update(pShape);
+
+    //Update Shape2
+    pShape2->rotate(360 * progress);
+    pShape2->translate(400 + progress * 300, 400);
+    canvas->update(pShape2);
+
+    //Update Shape3
+    pShape3->rotate(-360 * progress);
+    pShape3->scale(0.5 + progress);
+    canvas->update(pShape3);
+
+    //Draw Next frames
+    canvas->draw();
+    canvas->sync();
+
+    //Update Efl Canvas
+    Eo* img = (Eo*) effect;
+    evas_object_image_data_update_add(img, 0, 0, WIDTH, HEIGHT);
+}
+
+void
+win_del(void *data, Evas_Object *o, void *ev)
+{
+    elm_exit();
+}
+
+int main(int argc, char **argv)
+{
+    //Initialize TizenVG Engine
+    tvg::Engine::init();
+
+    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_Transit *transit = elm_transit_add();
+    elm_transit_effect_add(transit, transit_cb, img, nullptr);
+    elm_transit_duration_set(transit, 2);
+    elm_transit_repeat_times_set(transit, -1);
+    elm_transit_auto_reverse_set(transit, EINA_TRUE);
+    elm_transit_go(transit);
+
+    elm_run();
+    elm_shutdown();
+
+    //Terminate TizenVG Engine
+    tvg::Engine::term();
+}