Use ThorVG instead of NanoSVG for importing SVGs

ThorVG is a platform-independent portable library for drawing vector-based
scene and animation.

Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>

1 files changed, 427 insertions, 0 deletions

diff --git a/thirdparty/thorvg/src/lib/tvgShape.cpp b/thirdparty/thorvg/src/lib/tvgShape.cpp
new file mode 100644
index 0000000000..8db5635932
--- /dev/null
+++ b/thirdparty/thorvg/src/lib/tvgShape.cpp
@@ -0,0 +1,427 @@
+/*
+ * Copyright (c) 2020-2021 Samsung Electronics Co., Ltd. All rights reserved.
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "tvgMath.h"
+#include "tvgShapeImpl.h"
+
+/************************************************************************/
+/* Internal Class Implementation                                        */
+/************************************************************************/
+constexpr auto PATH_KAPPA = 0.552284f;
+
+/************************************************************************/
+/* External Class Implementation                                        */
+/************************************************************************/
+
+Shape :: Shape() : pImpl(new Impl(this))
+{
+    Paint::pImpl->id = TVG_CLASS_ID_SHAPE;
+    Paint::pImpl->method(new PaintMethod<Shape::Impl>(pImpl));
+}
+
+
+Shape :: ~Shape()
+{
+    delete(pImpl);
+}
+
+
+unique_ptr<Shape> Shape::gen() noexcept
+{
+    return unique_ptr<Shape>(new Shape);
+}
+
+
+uint32_t Shape::identifier() noexcept
+{
+    return TVG_CLASS_ID_SHAPE;
+}
+
+
+Result Shape::reset() noexcept
+{
+    pImpl->path.reset();
+    pImpl->flag = RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+uint32_t Shape::pathCommands(const PathCommand** cmds) const noexcept
+{
+    if (!cmds) return 0;
+
+    *cmds = pImpl->path.cmds;
+
+    return pImpl->path.cmdCnt;
+}
+
+
+uint32_t Shape::pathCoords(const Point** pts) const noexcept
+{
+    if (!pts) return 0;
+
+    *pts = pImpl->path.pts;
+
+    return pImpl->path.ptsCnt;
+}
+
+
+Result Shape::appendPath(const PathCommand *cmds, uint32_t cmdCnt, const Point* pts, uint32_t ptsCnt) noexcept
+{
+    if (cmdCnt == 0 || ptsCnt == 0 || !cmds || !pts) return Result::InvalidArguments;
+
+    pImpl->path.grow(cmdCnt, ptsCnt);
+    pImpl->path.append(cmds, cmdCnt, pts, ptsCnt);
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::moveTo(float x, float y) noexcept
+{
+    pImpl->path.moveTo(x, y);
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::lineTo(float x, float y) noexcept
+{
+    pImpl->path.lineTo(x, y);
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y) noexcept
+{
+    pImpl->path.cubicTo(cx1, cy1, cx2, cy2, x, y);
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::close() noexcept
+{
+    pImpl->path.close();
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::appendCircle(float cx, float cy, float rx, float ry) noexcept
+{
+    auto rxKappa = rx * PATH_KAPPA;
+    auto ryKappa = ry * PATH_KAPPA;
+
+    pImpl->path.grow(6, 13);
+    pImpl->path.moveTo(cx, cy - ry);
+    pImpl->path.cubicTo(cx + rxKappa, cy - ry, cx + rx, cy - ryKappa, cx + rx, cy);
+    pImpl->path.cubicTo(cx + rx, cy + ryKappa, cx + rxKappa, cy + ry, cx, cy + ry);
+    pImpl->path.cubicTo(cx - rxKappa, cy + ry, cx - rx, cy + ryKappa, cx - rx, cy);
+    pImpl->path.cubicTo(cx - rx, cy - ryKappa, cx - rxKappa, cy - ry, cx, cy - ry);
+    pImpl->path.close();
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+Result Shape::appendArc(float cx, float cy, float radius, float startAngle, float sweep, bool pie) noexcept
+{
+    //just circle
+    if (sweep >= 360.0f || sweep <= -360.0f) return appendCircle(cx, cy, radius, radius);
+
+    startAngle = (startAngle * M_PI) / 180.0f;
+    sweep = sweep * M_PI / 180.0f;
+
+    auto nCurves = ceil(fabsf(sweep / float(M_PI_2)));
+    auto sweepSign = (sweep < 0 ? -1 : 1);
+    auto fract = fmodf(sweep, float(M_PI_2));
+    fract = (mathZero(fract)) ? float(M_PI_2) * sweepSign : fract;
+
+    //Start from here
+    Point start = {radius * cosf(startAngle), radius * sinf(startAngle)};
+
+    if (pie) {
+        pImpl->path.moveTo(cx, cy);
+        pImpl->path.lineTo(start.x + cx, start.y + cy);
+    } else {
+        pImpl->path.moveTo(start.x + cx, start.y + cy);
+    }
+
+    for (int i = 0; i < nCurves; ++i) {
+        auto endAngle = startAngle + ((i != nCurves - 1) ? float(M_PI_2) * sweepSign : fract);
+        Point end = {radius * cosf(endAngle), radius * sinf(endAngle)};
+
+        //variables needed to calculate bezier control points
+
+        //get bezier control points using article:
+        //(http://itc.ktu.lt/index.php/ITC/article/view/11812/6479)
+        auto ax = start.x;
+        auto ay = start.y;
+        auto bx = end.x;
+        auto by = end.y;
+        auto q1 = ax * ax + ay * ay;
+        auto q2 = ax * bx + ay * by + q1;
+        auto k2 = (4.0f/3.0f) * ((sqrtf(2 * q1 * q2) - q2) / (ax * by - ay * bx));
+
+        start = end; //Next start point is the current end point
+
+        end.x += cx;
+        end.y += cy;
+
+        Point ctrl1 = {ax - k2 * ay + cx, ay + k2 * ax + cy};
+        Point ctrl2 = {bx + k2 * by + cx, by - k2 * bx + cy};
+
+        pImpl->path.cubicTo(ctrl1.x, ctrl1.y, ctrl2.x, ctrl2.y, end.x, end.y);
+
+        startAngle = endAngle;
+    }
+
+    if (pie) pImpl->path.close();
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::appendRect(float x, float y, float w, float h, float rx, float ry) noexcept
+{
+    auto halfW = w * 0.5f;
+    auto halfH = h * 0.5f;
+
+    //clamping cornerRadius by minimum size
+    if (rx > halfW) rx = halfW;
+    if (ry > halfH) ry = halfH;
+
+    //rectangle
+    if (rx == 0 && ry == 0) {
+        pImpl->path.grow(5, 4);
+        pImpl->path.moveTo(x, y);
+        pImpl->path.lineTo(x + w, y);
+        pImpl->path.lineTo(x + w, y + h);
+        pImpl->path.lineTo(x, y + h);
+        pImpl->path.close();
+    //circle
+    } else if (mathEqual(rx, halfW) && mathEqual(ry, halfH)) {
+        return appendCircle(x + (w * 0.5f), y + (h * 0.5f), rx, ry);
+    } else {
+        auto hrx = rx * 0.5f;
+        auto hry = ry * 0.5f;
+        pImpl->path.grow(10, 17);
+        pImpl->path.moveTo(x + rx, y);
+        pImpl->path.lineTo(x + w - rx, y);
+        pImpl->path.cubicTo(x + w - rx + hrx, y, x + w, y + ry - hry, x + w, y + ry);
+        pImpl->path.lineTo(x + w, y + h - ry);
+        pImpl->path.cubicTo(x + w, y + h - ry + hry, x + w - rx + hrx, y + h, x + w - rx, y + h);
+        pImpl->path.lineTo(x + rx, y + h);
+        pImpl->path.cubicTo(x + rx - hrx, y + h, x, y + h - ry + hry, x, y + h - ry);
+        pImpl->path.lineTo(x, y + ry);
+        pImpl->path.cubicTo(x, y + ry - hry, x + rx - hrx, y, x + rx, y);
+        pImpl->path.close();
+    }
+
+    pImpl->flag |= RenderUpdateFlag::Path;
+
+    return Result::Success;
+}
+
+
+Result Shape::fill(uint8_t r, uint8_t g, uint8_t b, uint8_t a) noexcept
+{
+    pImpl->color[0] = r;
+    pImpl->color[1] = g;
+    pImpl->color[2] = b;
+    pImpl->color[3] = a;
+    pImpl->flag |= RenderUpdateFlag::Color;
+
+    if (pImpl->fill) {
+        delete(pImpl->fill);
+        pImpl->fill = nullptr;
+        pImpl->flag |= RenderUpdateFlag::Gradient;
+    }
+
+    return Result::Success;
+}
+
+
+Result Shape::fill(unique_ptr<Fill> f) noexcept
+{
+    auto p = f.release();
+    if (!p) return Result::MemoryCorruption;
+
+    if (pImpl->fill && pImpl->fill != p) delete(pImpl->fill);
+    pImpl->fill = p;
+    pImpl->flag |= RenderUpdateFlag::Gradient;
+
+    return Result::Success;
+}
+
+
+Result Shape::fillColor(uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a) const noexcept
+{
+    if (r) *r = pImpl->color[0];
+    if (g) *g = pImpl->color[1];
+    if (b) *b = pImpl->color[2];
+    if (a) *a = pImpl->color[3];
+
+    return Result::Success;
+}
+
+const Fill* Shape::fill() const noexcept
+{
+    return pImpl->fill;
+}
+
+
+Result Shape::stroke(float width) noexcept
+{
+    if (!pImpl->strokeWidth(width)) return Result::FailedAllocation;
+
+    return Result::Success;
+}
+
+
+float Shape::strokeWidth() const noexcept
+{
+    if (!pImpl->stroke) return 0;
+    return pImpl->stroke->width;
+}
+
+
+Result Shape::stroke(uint8_t r, uint8_t g, uint8_t b, uint8_t a) noexcept
+{
+    if (!pImpl->strokeColor(r, g, b, a)) return Result::FailedAllocation;
+
+    return Result::Success;
+}
+
+
+Result Shape::strokeColor(uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a) const noexcept
+{
+    if (!pImpl->stroke) return Result::InsufficientCondition;
+
+    if (r) *r = pImpl->stroke->color[0];
+    if (g) *g = pImpl->stroke->color[1];
+    if (b) *b = pImpl->stroke->color[2];
+    if (a) *a = pImpl->stroke->color[3];
+
+    return Result::Success;
+}
+
+
+Result Shape::stroke(unique_ptr<Fill> f) noexcept
+{
+    return pImpl->strokeFill(move(f));
+}
+
+
+const Fill* Shape::strokeFill() const noexcept
+{
+    if (!pImpl->stroke) return nullptr;
+
+    return pImpl->stroke->fill;
+}
+
+
+Result Shape::stroke(const float* dashPattern, uint32_t cnt) noexcept
+{
+    if ((cnt == 1) || (!dashPattern && cnt > 0) || (dashPattern && cnt == 0)) {
+        return Result::InvalidArguments;
+    }
+
+    for (uint32_t i = 0; i < cnt; i++)
+        if (dashPattern[i] < FLT_EPSILON) return Result::InvalidArguments;
+
+    if (!pImpl->strokeDash(dashPattern, cnt)) return Result::FailedAllocation;
+
+    return Result::Success;
+}
+
+
+uint32_t Shape::strokeDash(const float** dashPattern) const noexcept
+{
+    if (!pImpl->stroke) return 0;
+
+    if (dashPattern) *dashPattern = pImpl->stroke->dashPattern;
+
+    return pImpl->stroke->dashCnt;
+}
+
+
+Result Shape::stroke(StrokeCap cap) noexcept
+{
+    if (!pImpl->strokeCap(cap)) return Result::FailedAllocation;
+
+    return Result::Success;
+}
+
+
+Result Shape::stroke(StrokeJoin join) noexcept
+{
+    if (!pImpl->strokeJoin(join)) return Result::FailedAllocation;
+
+    return Result::Success;
+}
+
+
+StrokeCap Shape::strokeCap() const noexcept
+{
+    if (!pImpl->stroke) return StrokeCap::Square;
+
+    return pImpl->stroke->cap;
+}
+
+
+StrokeJoin Shape::strokeJoin() const noexcept
+{
+    if (!pImpl->stroke) return StrokeJoin::Bevel;
+
+    return pImpl->stroke->join;
+}
+
+
+Result Shape::fill(FillRule r) noexcept
+{
+    pImpl->rule = r;
+
+    return Result::Success;
+}
+
+
+FillRule Shape::fillRule() const noexcept
+{
+    return pImpl->rule;
+}
\ No newline at end of file