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+/*
+ * Copyright (c) 2020 - 2023 the ThorVG project. 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.
+ */
+
+#ifndef _TVG_SHAPE_IMPL_H_
+#define _TVG_SHAPE_IMPL_H_
+
+#include <memory.h>
+#include "tvgMath.h"
+#include "tvgPaint.h"
+
+/************************************************************************/
+/* Internal Class Implementation */
+/************************************************************************/
+
+struct Shape::Impl
+{
+ RenderShape rs; //shape data
+ RenderData rd = nullptr; //engine data
+ Shape* shape;
+ uint8_t flag = RenderUpdateFlag::None;
+ uint8_t opacity; //for composition
+ bool needComp; //composite or not
+
+ Impl(Shape* s) : shape(s)
+ {
+ }
+
+ bool dispose(RenderMethod& renderer)
+ {
+ renderer.dispose(rd);
+ rd = nullptr;
+ return true;
+ }
+
+ bool render(RenderMethod& renderer)
+ {
+ Compositor* cmp = nullptr;
+ bool ret;
+
+ if (needComp) {
+ cmp = renderer.target(bounds(renderer), renderer.colorSpace());
+ renderer.beginComposite(cmp, CompositeMethod::None, opacity);
+ }
+ ret = renderer.renderShape(rd);
+ if (cmp) renderer.endComposite(cmp);
+ return ret;
+ }
+
+ bool needComposition(uint8_t opacity)
+ {
+ if (opacity == 0) return false;
+
+ //Shape composition is only necessary when stroking & fill are valid.
+ if (!rs.stroke || rs.stroke->width < FLT_EPSILON || (!rs.stroke->fill && rs.stroke->color[3] == 0)) return false;
+ if (!rs.fill && rs.color[3] == 0) return false;
+
+ //translucent fill & stroke
+ if (opacity < 255) return true;
+
+ //Composition test
+ const Paint* target;
+ auto method = shape->composite(&target);
+ if (!target || method == tvg::CompositeMethod::ClipPath) return false;
+ if (target->pImpl->opacity == 255 || target->pImpl->opacity == 0) return false;
+
+ return true;
+ }
+
+ RenderData update(RenderMethod& renderer, const RenderTransform* transform, Array<RenderData>& clips, uint8_t opacity, RenderUpdateFlag pFlag, bool clipper)
+ {
+ if ((needComp = needComposition(opacity))) {
+ /* Overriding opacity value. If this scene is half-translucent,
+ It must do intermeidate composition with that opacity value. */
+ this->opacity = opacity;
+ opacity = 255;
+ }
+
+ rd = renderer.prepare(rs, rd, transform, clips, opacity, static_cast<RenderUpdateFlag>(pFlag | flag), clipper);
+ flag = RenderUpdateFlag::None;
+ return rd;
+ }
+
+ RenderRegion bounds(RenderMethod& renderer)
+ {
+ return renderer.region(rd);
+ }
+
+ bool bounds(float* x, float* y, float* w, float* h, bool stroking)
+ {
+ //Path bounding size
+ if (rs.path.pts.count > 0 ) {
+ auto pts = rs.path.pts.data;
+ Point min = { pts->x, pts->y };
+ Point max = { pts->x, pts->y };
+
+ for (auto pts2 = pts + 1; pts2 < rs.path.pts.end(); ++pts2) {
+ if (pts2->x < min.x) min.x = pts2->x;
+ if (pts2->y < min.y) min.y = pts2->y;
+ if (pts2->x > max.x) max.x = pts2->x;
+ if (pts2->y > max.y) max.y = pts2->y;
+ }
+
+ if (x) *x = min.x;
+ if (y) *y = min.y;
+ if (w) *w = max.x - min.x;
+ if (h) *h = max.y - min.y;
+ }
+
+ //Stroke feathering
+ if (stroking && rs.stroke) {
+ if (x) *x -= rs.stroke->width * 0.5f;
+ if (y) *y -= rs.stroke->width * 0.5f;
+ if (w) *w += rs.stroke->width;
+ if (h) *h += rs.stroke->width;
+ }
+ return rs.path.pts.count > 0 ? true : false;
+ }
+
+ void reserveCmd(uint32_t cmdCnt)
+ {
+ rs.path.cmds.reserve(cmdCnt);
+ }
+
+ void reservePts(uint32_t ptsCnt)
+ {
+ rs.path.pts.reserve(ptsCnt);
+ }
+
+ void grow(uint32_t cmdCnt, uint32_t ptsCnt)
+ {
+ rs.path.cmds.grow(cmdCnt);
+ rs.path.pts.grow(ptsCnt);
+ }
+
+ void append(const PathCommand* cmds, uint32_t cmdCnt, const Point* pts, uint32_t ptsCnt)
+ {
+ memcpy(rs.path.cmds.end(), cmds, sizeof(PathCommand) * cmdCnt);
+ memcpy(rs.path.pts.end(), pts, sizeof(Point) * ptsCnt);
+ rs.path.cmds.count += cmdCnt;
+ rs.path.pts.count += ptsCnt;
+
+ flag |= RenderUpdateFlag::Path;
+ }
+
+ void moveTo(float x, float y)
+ {
+ rs.path.cmds.push(PathCommand::MoveTo);
+ rs.path.pts.push({x, y});
+
+ flag |= RenderUpdateFlag::Path;
+ }
+
+ void lineTo(float x, float y)
+ {
+ rs.path.cmds.push(PathCommand::LineTo);
+ rs.path.pts.push({x, y});
+
+ flag |= RenderUpdateFlag::Path;
+ }
+
+ void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y)
+ {
+ rs.path.cmds.push(PathCommand::CubicTo);
+ rs.path.pts.push({cx1, cy1});
+ rs.path.pts.push({cx2, cy2});
+ rs.path.pts.push({x, y});
+
+ flag |= RenderUpdateFlag::Path;
+ }
+
+ void close()
+ {
+ //Don't close multiple times.
+ if (rs.path.cmds.count > 0 && rs.path.cmds.last() == PathCommand::Close) return;
+
+ rs.path.cmds.push(PathCommand::Close);
+
+ flag |= RenderUpdateFlag::Path;
+ }
+
+ bool strokeWidth(float width)
+ {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ rs.stroke->width = width;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ bool strokeTrim(float begin, float end)
+ {
+ if (!rs.stroke) {
+ if (begin == 0.0f && end == 1.0f) return true;
+ rs.stroke = new RenderStroke();
+ }
+
+ if (mathEqual(rs.stroke->trim.begin, begin) && mathEqual(rs.stroke->trim.end, end)) return true;
+
+ rs.stroke->trim.begin = begin;
+ rs.stroke->trim.end = end;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ bool strokeCap(StrokeCap cap)
+ {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ rs.stroke->cap = cap;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ bool strokeJoin(StrokeJoin join)
+ {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ rs.stroke->join = join;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ bool strokeMiterlimit(float miterlimit)
+ {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ rs.stroke->miterlimit = miterlimit;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ bool strokeColor(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
+ {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ if (rs.stroke->fill) {
+ delete(rs.stroke->fill);
+ rs.stroke->fill = nullptr;
+ flag |= RenderUpdateFlag::GradientStroke;
+ }
+
+ rs.stroke->color[0] = r;
+ rs.stroke->color[1] = g;
+ rs.stroke->color[2] = b;
+ rs.stroke->color[3] = a;
+
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ Result strokeFill(unique_ptr<Fill> f)
+ {
+ auto p = f.release();
+ if (!p) return Result::MemoryCorruption;
+
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ if (rs.stroke->fill && rs.stroke->fill != p) delete(rs.stroke->fill);
+ rs.stroke->fill = p;
+
+ flag |= RenderUpdateFlag::Stroke;
+ flag |= RenderUpdateFlag::GradientStroke;
+
+ return Result::Success;
+ }
+
+ Result strokeDash(const float* pattern, uint32_t cnt, float offset)
+ {
+ if ((cnt == 1) || (!pattern && cnt > 0) || (pattern && cnt == 0)) {
+ return Result::InvalidArguments;
+ }
+
+ for (uint32_t i = 0; i < cnt; i++) {
+ if (pattern[i] < FLT_EPSILON) return Result::InvalidArguments;
+ }
+
+ //Reset dash
+ if (!pattern && cnt == 0) {
+ free(rs.stroke->dashPattern);
+ rs.stroke->dashPattern = nullptr;
+ } else {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ if (rs.stroke->dashCnt != cnt) {
+ free(rs.stroke->dashPattern);
+ rs.stroke->dashPattern = nullptr;
+ }
+ if (!rs.stroke->dashPattern) {
+ rs.stroke->dashPattern = static_cast<float*>(malloc(sizeof(float) * cnt));
+ if (!rs.stroke->dashPattern) return Result::FailedAllocation;
+ }
+ for (uint32_t i = 0; i < cnt; ++i) {
+ rs.stroke->dashPattern[i] = pattern[i];
+ }
+ }
+ rs.stroke->dashCnt = cnt;
+ rs.stroke->dashOffset = offset;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return Result::Success;
+ }
+
+ bool strokeFirst()
+ {
+ if (!rs.stroke) return true;
+ return rs.stroke->strokeFirst;
+ }
+
+ bool strokeFirst(bool strokeFirst)
+ {
+ if (!rs.stroke) rs.stroke = new RenderStroke();
+ rs.stroke->strokeFirst = strokeFirst;
+ flag |= RenderUpdateFlag::Stroke;
+
+ return true;
+ }
+
+ void update(RenderUpdateFlag flag)
+ {
+ this->flag |= flag;
+ }
+
+ Paint* duplicate()
+ {
+ auto ret = Shape::gen();
+
+ auto dup = ret.get()->pImpl;
+ dup->rs.rule = rs.rule;
+
+ //Color
+ memcpy(dup->rs.color, rs.color, sizeof(rs.color));
+ dup->flag = RenderUpdateFlag::Color;
+
+ //Path
+ if (rs.path.cmds.count > 0 && rs.path.pts.count > 0) {
+ dup->rs.path.cmds = rs.path.cmds;
+ dup->rs.path.pts = rs.path.pts;
+ dup->flag |= RenderUpdateFlag::Path;
+ }
+
+ //Stroke
+ if (rs.stroke) {
+ dup->rs.stroke = new RenderStroke();
+ *dup->rs.stroke = *rs.stroke;
+ memcpy(dup->rs.stroke->color, rs.stroke->color, sizeof(rs.stroke->color));
+ if (rs.stroke->dashCnt > 0) {
+ dup->rs.stroke->dashPattern = static_cast<float*>(malloc(sizeof(float) * rs.stroke->dashCnt));
+ memcpy(dup->rs.stroke->dashPattern, rs.stroke->dashPattern, sizeof(float) * rs.stroke->dashCnt);
+ }
+ if (rs.stroke->fill) {
+ dup->rs.stroke->fill = rs.stroke->fill->duplicate();
+ dup->flag |= RenderUpdateFlag::GradientStroke;
+ }
+ dup->flag |= RenderUpdateFlag::Stroke;
+ }
+
+ //Fill
+ if (rs.fill) {
+ dup->rs.fill = rs.fill->duplicate();
+ dup->flag |= RenderUpdateFlag::Gradient;
+ }
+
+ return ret.release();
+ }
+
+ Iterator* iterator()
+ {
+ return nullptr;
+ }
+};
+
+#endif //_TVG_SHAPE_IMPL_H_