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Diffstat (limited to 'thirdparty/thorvg/src/lib/tvgShape.cpp')
| -rw-r--r-- | thirdparty/thorvg/src/lib/tvgShape.cpp | 427 |
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; +}
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