mirror of
https://github.com/thorvg/thorvg.git
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820 lines
31 KiB
C++
820 lines
31 KiB
C++
/*
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* Copyright (c) 2020 - 2023 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* Copyright notice for the EFL:
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* Copyright (C) EFL developers (see AUTHORS)
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tvgMath.h" /* to include math.h before cstring */
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#include <cstring>
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#include <string>
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#include "tvgSvgLoaderCommon.h"
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#include "tvgSvgSceneBuilder.h"
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#include "tvgSvgPath.h"
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#include "tvgSvgUtil.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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struct Box
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{
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float x, y, w, h;
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};
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static bool _appendShape(SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath);
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static unique_ptr<Scene> _sceneBuildHelper(const SvgNode* node, const Box& vBox, const string& svgPath, bool mask, int depth, bool* isMaskWhite = nullptr);
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static inline bool _isGroupType(SvgNodeType type)
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{
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if (type == SvgNodeType::Doc || type == SvgNodeType::G || type == SvgNodeType::Use || type == SvgNodeType::ClipPath || type == SvgNodeType::Symbol) return true;
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return false;
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}
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//According to: https://www.w3.org/TR/SVG11/coords.html#ObjectBoundingBoxUnits (the last paragraph)
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//a stroke width should be ignored for bounding box calculations
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static Box _boundingBox(const Shape* shape)
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{
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float x, y, w, h;
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shape->bounds(&x, &y, &w, &h, false);
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if (auto strokeW = shape->strokeWidth()) {
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x += 0.5f * strokeW;
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y += 0.5f * strokeW;
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w -= strokeW;
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h -= strokeW;
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}
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return {x, y, w, h};
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}
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static void _transformMultiply(const Matrix* mBBox, Matrix* gradTransf)
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{
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gradTransf->e13 = gradTransf->e13 * mBBox->e11 + mBBox->e13;
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gradTransf->e12 *= mBBox->e11;
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gradTransf->e11 *= mBBox->e11;
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gradTransf->e23 = gradTransf->e23 * mBBox->e22 + mBBox->e23;
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gradTransf->e22 *= mBBox->e22;
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gradTransf->e21 *= mBBox->e22;
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}
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static unique_ptr<LinearGradient> _applyLinearGradientProperty(SvgStyleGradient* g, const Shape* vg, const Box& vBox, int opacity)
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{
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Fill::ColorStop* stops;
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int stopCount = 0;
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auto fillGrad = LinearGradient::gen();
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bool isTransform = (g->transform ? true : false);
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Matrix finalTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
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if (isTransform) finalTransform = *g->transform;
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if (g->userSpace) {
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g->linear->x1 = g->linear->x1 * vBox.w;
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g->linear->y1 = g->linear->y1 * vBox.h;
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g->linear->x2 = g->linear->x2 * vBox.w;
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g->linear->y2 = g->linear->y2 * vBox.h;
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} else {
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Matrix m = {vBox.w, 0, vBox.x, 0, vBox.h, vBox.y, 0, 0, 1};
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if (isTransform) _transformMultiply(&m, &finalTransform);
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else {
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finalTransform = m;
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isTransform = true;
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}
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}
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if (isTransform) fillGrad->transform(finalTransform);
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fillGrad->linear(g->linear->x1, g->linear->y1, g->linear->x2, g->linear->y2);
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fillGrad->spread(g->spread);
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//Update the stops
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stopCount = g->stops.count;
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if (stopCount > 0) {
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stops = (Fill::ColorStop*)calloc(stopCount, sizeof(Fill::ColorStop));
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if (!stops) return fillGrad;
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auto prevOffset = 0.0f;
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for (uint32_t i = 0; i < g->stops.count; ++i) {
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auto colorStop = &g->stops.data[i];
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//Use premultiplied color
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stops[i].r = colorStop->r;
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stops[i].g = colorStop->g;
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stops[i].b = colorStop->b;
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stops[i].a = static_cast<uint8_t>((colorStop->a * opacity) / 255);
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stops[i].offset = colorStop->offset;
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//check the offset corner cases - refer to: https://svgwg.org/svg2-draft/pservers.html#StopNotes
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if (colorStop->offset < prevOffset) stops[i].offset = prevOffset;
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else if (colorStop->offset > 1) stops[i].offset = 1;
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prevOffset = stops[i].offset;
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}
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fillGrad->colorStops(stops, stopCount);
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free(stops);
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}
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return fillGrad;
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}
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static unique_ptr<RadialGradient> _applyRadialGradientProperty(SvgStyleGradient* g, const Shape* vg, const Box& vBox, int opacity)
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{
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Fill::ColorStop *stops;
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int stopCount = 0;
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auto fillGrad = RadialGradient::gen();
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bool isTransform = (g->transform ? true : false);
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Matrix finalTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
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if (isTransform) finalTransform = *g->transform;
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if (g->userSpace) {
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//The radius scalling is done according to the Units section:
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//https://www.w3.org/TR/2015/WD-SVG2-20150915/coords.html
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g->radial->cx = g->radial->cx * vBox.w;
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g->radial->cy = g->radial->cy * vBox.h;
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g->radial->r = g->radial->r * sqrtf(powf(vBox.w, 2.0f) + powf(vBox.h, 2.0f)) / sqrtf(2.0f);
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g->radial->fx = g->radial->fx * vBox.w;
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g->radial->fy = g->radial->fy * vBox.h;
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} else {
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Matrix m = {vBox.w, 0, vBox.x, 0, vBox.h, vBox.y, 0, 0, 1};
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if (isTransform) _transformMultiply(&m, &finalTransform);
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else {
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finalTransform = m;
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isTransform = true;
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}
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}
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if (isTransform) fillGrad->transform(finalTransform);
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//TODO: Tvg is not support to focal
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//if (g->radial->fx != 0 && g->radial->fy != 0) {
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// fillGrad->radial(g->radial->fx, g->radial->fy, g->radial->r);
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//}
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fillGrad->radial(g->radial->cx, g->radial->cy, g->radial->r);
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fillGrad->spread(g->spread);
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//Update the stops
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stopCount = g->stops.count;
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if (stopCount > 0) {
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stops = (Fill::ColorStop*)calloc(stopCount, sizeof(Fill::ColorStop));
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if (!stops) return fillGrad;
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auto prevOffset = 0.0f;
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for (uint32_t i = 0; i < g->stops.count; ++i) {
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auto colorStop = &g->stops.data[i];
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//Use premultiplied color
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stops[i].r = colorStop->r;
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stops[i].g = colorStop->g;
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stops[i].b = colorStop->b;
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stops[i].a = static_cast<uint8_t>((colorStop->a * opacity) / 255);
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stops[i].offset = colorStop->offset;
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//check the offset corner cases - refer to: https://svgwg.org/svg2-draft/pservers.html#StopNotes
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if (colorStop->offset < prevOffset) stops[i].offset = prevOffset;
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else if (colorStop->offset > 1) stops[i].offset = 1;
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prevOffset = stops[i].offset;
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}
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fillGrad->colorStops(stops, stopCount);
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free(stops);
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}
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return fillGrad;
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}
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static bool _appendChildShape(SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath)
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{
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auto valid = false;
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if (_appendShape(node, shape, vBox, svgPath)) valid = true;
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if (node->child.count > 0) {
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auto child = node->child.data;
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for (uint32_t i = 0; i < node->child.count; ++i, ++child) {
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if (_appendChildShape(*child, shape, vBox, svgPath)) valid = true;
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}
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}
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return valid;
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}
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static void _applyComposition(Paint* paint, const SvgNode* node, const Box& vBox, const string& svgPath)
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{
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/* ClipPath */
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/* Do not drop in Circular Dependency for ClipPath.
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Composition can be applied recursively if its children nodes have composition target to this one. */
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if (node->style->clipPath.applying) {
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TVGLOG("SVG", "Multiple Composition Tried! Check out Circular dependency?");
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} else {
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auto compNode = node->style->clipPath.node;
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if (compNode && compNode->child.count > 0) {
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node->style->clipPath.applying = true;
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auto comp = Shape::gen();
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auto child = compNode->child.data;
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auto valid = false; //Composite only when valid shapes are existed
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for (uint32_t i = 0; i < compNode->child.count; ++i, ++child) {
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if (_appendChildShape(*child, comp.get(), vBox, svgPath)) valid = true;
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}
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if (node->transform) {
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auto m = comp->transform();
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m = mathMultiply(node->transform, &m);
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comp->transform(m);
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}
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if (valid) paint->composite(move(comp), CompositeMethod::ClipPath);
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node->style->clipPath.applying = false;
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}
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}
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/* Mask */
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/* Do not drop in Circular Dependency for Mask.
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Composition can be applied recursively if its children nodes have composition target to this one. */
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if (node->style->mask.applying) {
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TVGLOG("SVG", "Multiple Composition Tried! Check out Circular dependency?");
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} else {
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auto compNode = node->style->mask.node;
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if (compNode && compNode->child.count > 0) {
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node->style->mask.applying = true;
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bool isMaskWhite = true;
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auto comp = _sceneBuildHelper(compNode, vBox, svgPath, true, 0, &isMaskWhite);
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if (comp) {
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if (node->transform) comp->transform(*node->transform);
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if (compNode->node.mask.type == SvgMaskType::Luminance && !isMaskWhite) {
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paint->composite(move(comp), CompositeMethod::LumaMask);
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} else {
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paint->composite(move(comp), CompositeMethod::AlphaMask);
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}
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}
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node->style->mask.applying = false;
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}
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}
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}
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static void _applyProperty(SvgNode* node, Shape* vg, const Box& vBox, const string& svgPath)
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{
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SvgStyleProperty* style = node->style;
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if (node->transform) vg->transform(*node->transform);
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if (node->type == SvgNodeType::Doc || !node->display) return;
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//If fill property is nullptr then do nothing
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if (style->fill.paint.none) {
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//Do nothing
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} else if (style->fill.paint.gradient) {
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Box bBox = vBox;
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if (!style->fill.paint.gradient->userSpace) bBox = _boundingBox(vg);
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if (style->fill.paint.gradient->type == SvgGradientType::Linear) {
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auto linear = _applyLinearGradientProperty(style->fill.paint.gradient, vg, bBox, style->fill.opacity);
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vg->fill(move(linear));
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} else if (style->fill.paint.gradient->type == SvgGradientType::Radial) {
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auto radial = _applyRadialGradientProperty(style->fill.paint.gradient, vg, bBox, style->fill.opacity);
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vg->fill(move(radial));
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}
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} else if (style->fill.paint.url) {
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//TODO: Apply the color pointed by url
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} else if (style->fill.paint.curColor) {
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//Apply the current style color
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vg->fill(style->color.r, style->color.g, style->color.b, style->fill.opacity);
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} else {
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//Apply the fill color
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vg->fill(style->fill.paint.color.r, style->fill.paint.color.g, style->fill.paint.color.b, style->fill.opacity);
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}
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//Apply the fill rule
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vg->fill((tvg::FillRule)style->fill.fillRule);
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//Rendering order
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vg->order(!style->paintOrder);
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//Apply node opacity
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if (style->opacity < 255) vg->opacity(style->opacity);
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if (node->type == SvgNodeType::G || node->type == SvgNodeType::Use) return;
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//Apply the stroke style property
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vg->stroke(style->stroke.width);
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vg->stroke(style->stroke.cap);
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vg->stroke(style->stroke.join);
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if (style->stroke.dash.array.count > 0) {
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vg->stroke(style->stroke.dash.array.data, style->stroke.dash.array.count);
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}
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//If stroke property is nullptr then do nothing
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if (style->stroke.paint.none) {
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vg->stroke(0.0f);
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} else if (style->stroke.paint.gradient) {
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Box bBox = vBox;
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if (!style->stroke.paint.gradient->userSpace) bBox = _boundingBox(vg);
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if (style->stroke.paint.gradient->type == SvgGradientType::Linear) {
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auto linear = _applyLinearGradientProperty(style->stroke.paint.gradient, vg, bBox, style->stroke.opacity);
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vg->stroke(move(linear));
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} else if (style->stroke.paint.gradient->type == SvgGradientType::Radial) {
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auto radial = _applyRadialGradientProperty(style->stroke.paint.gradient, vg, bBox, style->stroke.opacity);
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vg->stroke(move(radial));
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}
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} else if (style->stroke.paint.url) {
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//TODO: Apply the color pointed by url
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} else if (style->stroke.paint.curColor) {
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//Apply the current style color
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vg->stroke(style->color.r, style->color.g, style->color.b, style->stroke.opacity);
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} else {
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//Apply the stroke color
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vg->stroke(style->stroke.paint.color.r, style->stroke.paint.color.g, style->stroke.paint.color.b, style->stroke.opacity);
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}
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_applyComposition(vg, node, vBox, svgPath);
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}
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static unique_ptr<Shape> _shapeBuildHelper(SvgNode* node, const Box& vBox, const string& svgPath)
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{
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auto shape = Shape::gen();
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if (_appendShape(node, shape.get(), vBox, svgPath)) return shape;
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else return nullptr;
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}
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static bool _appendShape(SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath)
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{
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Array<PathCommand> cmds;
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Array<Point> pts;
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switch (node->type) {
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case SvgNodeType::Path: {
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if (node->node.path.path) {
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if (svgPathToTvgPath(node->node.path.path, cmds, pts)) {
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shape->appendPath(cmds.data, cmds.count, pts.data, pts.count);
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}
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}
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break;
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}
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case SvgNodeType::Ellipse: {
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shape->appendCircle(node->node.ellipse.cx, node->node.ellipse.cy, node->node.ellipse.rx, node->node.ellipse.ry);
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break;
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}
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case SvgNodeType::Polygon: {
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if (node->node.polygon.pointsCount < 2) break;
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shape->moveTo(node->node.polygon.points[0], node->node.polygon.points[1]);
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for (int i = 2; i < node->node.polygon.pointsCount - 1; i += 2) {
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shape->lineTo(node->node.polygon.points[i], node->node.polygon.points[i + 1]);
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}
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shape->close();
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break;
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}
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case SvgNodeType::Polyline: {
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if (node->node.polygon.pointsCount < 2) break;
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shape->moveTo(node->node.polygon.points[0], node->node.polygon.points[1]);
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for (int i = 2; i < node->node.polygon.pointsCount - 1; i += 2) {
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shape->lineTo(node->node.polygon.points[i], node->node.polygon.points[i + 1]);
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}
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break;
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}
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case SvgNodeType::Circle: {
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shape->appendCircle(node->node.circle.cx, node->node.circle.cy, node->node.circle.r, node->node.circle.r);
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break;
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}
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case SvgNodeType::Rect: {
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shape->appendRect(node->node.rect.x, node->node.rect.y, node->node.rect.w, node->node.rect.h, node->node.rect.rx, node->node.rect.ry);
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break;
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}
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case SvgNodeType::Line: {
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shape->moveTo(node->node.line.x1, node->node.line.y1);
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shape->lineTo(node->node.line.x2, node->node.line.y2);
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break;
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}
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default: {
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return false;
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}
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}
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_applyProperty(node, shape, vBox, svgPath);
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return true;
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}
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enum class imageMimeTypeEncoding
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{
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base64 = 0x1,
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utf8 = 0x2
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};
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constexpr imageMimeTypeEncoding operator|(imageMimeTypeEncoding a, imageMimeTypeEncoding b) {
|
|
return static_cast<imageMimeTypeEncoding>(static_cast<int>(a) | static_cast<int>(b));
|
|
}
|
|
|
|
constexpr bool operator&(imageMimeTypeEncoding a, imageMimeTypeEncoding b) {
|
|
return (static_cast<int>(a) & static_cast<int>(b));
|
|
}
|
|
|
|
|
|
static constexpr struct
|
|
{
|
|
const char* name;
|
|
int sz;
|
|
imageMimeTypeEncoding encoding;
|
|
} imageMimeTypes[] = {
|
|
{"jpeg", sizeof("jpeg"), imageMimeTypeEncoding::base64},
|
|
{"png", sizeof("png"), imageMimeTypeEncoding::base64},
|
|
{"svg+xml", sizeof("svg+xml"), imageMimeTypeEncoding::base64 | imageMimeTypeEncoding::utf8},
|
|
};
|
|
|
|
|
|
static bool _isValidImageMimeTypeAndEncoding(const char** href, const char** mimetype, imageMimeTypeEncoding* encoding) {
|
|
if (strncmp(*href, "image/", sizeof("image/") - 1)) return false; //not allowed mime type
|
|
*href += sizeof("image/") - 1;
|
|
|
|
//RFC2397 data:[<mediatype>][;base64],<data>
|
|
//mediatype := [ type "/" subtype ] *( ";" parameter )
|
|
//parameter := attribute "=" value
|
|
for (unsigned int i = 0; i < sizeof(imageMimeTypes) / sizeof(imageMimeTypes[0]); i++) {
|
|
if (!strncmp(*href, imageMimeTypes[i].name, imageMimeTypes[i].sz - 1)) {
|
|
*href += imageMimeTypes[i].sz - 1;
|
|
*mimetype = imageMimeTypes[i].name;
|
|
|
|
while (**href && **href != ',') {
|
|
while (**href && **href != ';') ++(*href);
|
|
if (!**href) return false;
|
|
++(*href);
|
|
|
|
if (imageMimeTypes[i].encoding & imageMimeTypeEncoding::base64) {
|
|
if (!strncmp(*href, "base64,", sizeof("base64,") - 1)) {
|
|
*href += sizeof("base64,") - 1;
|
|
*encoding = imageMimeTypeEncoding::base64;
|
|
return true; //valid base64
|
|
}
|
|
}
|
|
if (imageMimeTypes[i].encoding & imageMimeTypeEncoding::utf8) {
|
|
if (!strncmp(*href, "utf8,", sizeof("utf8,") - 1)) {
|
|
*href += sizeof("utf8,") - 1;
|
|
*encoding = imageMimeTypeEncoding::utf8;
|
|
return true; //valid utf8
|
|
}
|
|
}
|
|
}
|
|
//no encoding defined
|
|
if (**href == ',' && (imageMimeTypes[i].encoding & imageMimeTypeEncoding::utf8)) {
|
|
++(*href);
|
|
*encoding = imageMimeTypeEncoding::utf8;
|
|
return true; //allow no encoding defined if utf8 expected
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
static unique_ptr<Picture> _imageBuildHelper(SvgNode* node, const Box& vBox, const string& svgPath)
|
|
{
|
|
if (!node->node.image.href) return nullptr;
|
|
auto picture = Picture::gen();
|
|
|
|
const char* href = node->node.image.href;
|
|
if (!strncmp(href, "data:", sizeof("data:") - 1)) {
|
|
href += sizeof("data:") - 1;
|
|
const char* mimetype;
|
|
imageMimeTypeEncoding encoding;
|
|
if (!_isValidImageMimeTypeAndEncoding(&href, &mimetype, &encoding)) return nullptr; //not allowed mime type or encoding
|
|
if (encoding == imageMimeTypeEncoding::base64) {
|
|
string decoded = svgUtilBase64Decode(href);
|
|
if (picture->load(decoded.c_str(), decoded.size(), mimetype, true) != Result::Success) return nullptr;
|
|
} else {
|
|
string decoded = svgUtilURLDecode(href);
|
|
if (picture->load(decoded.c_str(), decoded.size(), mimetype, true) != Result::Success) return nullptr;
|
|
}
|
|
} else {
|
|
if (!strncmp(href, "file://", sizeof("file://") - 1)) href += sizeof("file://") - 1;
|
|
//TODO: protect against recursive svg image loading
|
|
//Temporarily disable embedded svg:
|
|
const char *dot = strrchr(href, '.');
|
|
if (dot && !strcmp(dot, ".svg")) {
|
|
TVGLOG("SVG", "Embedded svg file is disabled.");
|
|
return nullptr;
|
|
}
|
|
string imagePath = href;
|
|
if (strncmp(href, "/", 1)) {
|
|
auto last = svgPath.find_last_of("/");
|
|
imagePath = svgPath.substr(0, (last == string::npos ? 0 : last + 1)) + imagePath;
|
|
}
|
|
if (picture->load(imagePath) != Result::Success) return nullptr;
|
|
}
|
|
|
|
float w, h;
|
|
Matrix m = {1, 0, 0, 0, 1, 0, 0, 0, 1};
|
|
if (picture->size(&w, &h) == Result::Success && w > 0 && h > 0) {
|
|
auto sx = node->node.image.w / w;
|
|
auto sy = node->node.image.h / h;
|
|
m = {sx, 0, node->node.image.x, 0, sy, node->node.image.y, 0, 0, 1};
|
|
}
|
|
if (node->transform) m = mathMultiply(node->transform, &m);
|
|
picture->transform(m);
|
|
|
|
_applyComposition(picture.get(), node, vBox, svgPath);
|
|
return picture;
|
|
}
|
|
|
|
|
|
static Matrix _calculateAspectRatioMatrix(AspectRatioAlign align, AspectRatioMeetOrSlice meetOrSlice, float width, float height, const Box& box)
|
|
{
|
|
auto sx = width / box.w;
|
|
auto sy = height / box.h;
|
|
auto tvx = box.x * sx;
|
|
auto tvy = box.y * sy;
|
|
|
|
if (align == AspectRatioAlign::None)
|
|
return {sx, 0, -tvx, 0, sy, -tvy, 0, 0, 1};
|
|
|
|
//Scale
|
|
if (meetOrSlice == AspectRatioMeetOrSlice::Meet) {
|
|
if (sx < sy) sy = sx;
|
|
else sx = sy;
|
|
} else {
|
|
if (sx < sy) sx = sy;
|
|
else sy = sx;
|
|
}
|
|
|
|
//Align
|
|
tvx = box.x * sx;
|
|
tvy = box.y * sy;
|
|
auto tvw = box.w * sx;
|
|
auto tvh = box.h * sy;
|
|
|
|
switch (align) {
|
|
case AspectRatioAlign::XMinYMin: {
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMidYMin: {
|
|
tvx -= (width - tvw) * 0.5f;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMaxYMin: {
|
|
tvx -= width - tvw;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMinYMid: {
|
|
tvy -= (height - tvh) * 0.5f;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMidYMid: {
|
|
tvx -= (width - tvw) * 0.5f;
|
|
tvy -= (height - tvh) * 0.5f;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMaxYMid: {
|
|
tvx -= width - tvw;
|
|
tvy -= (height - tvh) * 0.5f;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMinYMax: {
|
|
tvy -= height - tvh;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMidYMax: {
|
|
tvx -= (width - tvw) * 0.5f;
|
|
tvy -= height - tvh;
|
|
break;
|
|
}
|
|
case AspectRatioAlign::XMaxYMax: {
|
|
tvx -= width - tvw;
|
|
tvy -= height - tvh;
|
|
break;
|
|
}
|
|
default: {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return {sx, 0, -tvx, 0, sy, -tvy, 0, 0, 1};
|
|
}
|
|
|
|
|
|
static unique_ptr<Scene> _useBuildHelper(const SvgNode* node, const Box& vBox, const string& svgPath, int depth, bool* isMaskWhite)
|
|
{
|
|
unique_ptr<Scene> finalScene;
|
|
auto scene = _sceneBuildHelper(node, vBox, svgPath, false, depth + 1, isMaskWhite);
|
|
|
|
// mUseTransform = mUseTransform * mTranslate
|
|
Matrix mUseTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
|
|
if (node->transform) mUseTransform = *node->transform;
|
|
if (node->node.use.x != 0.0f || node->node.use.y != 0.0f) {
|
|
Matrix mTranslate = {1, 0, node->node.use.x, 0, 1, node->node.use.y, 0, 0, 1};
|
|
mUseTransform = mathMultiply(&mUseTransform, &mTranslate);
|
|
}
|
|
|
|
if (node->node.use.symbol) {
|
|
auto symbol = node->node.use.symbol->node.symbol;
|
|
|
|
auto width = (symbol.hasWidth ? symbol.w : vBox.w);
|
|
if (node->node.use.isWidthSet) width = node->node.use.w;
|
|
auto height = (symbol.hasHeight ? symbol.h : vBox.h);;
|
|
if (node->node.use.isHeightSet) height = node->node.use.h;
|
|
auto vw = (symbol.hasViewBox ? symbol.vw : width);
|
|
auto vh = (symbol.hasViewBox ? symbol.vh : height);
|
|
|
|
Matrix mViewBox = {1, 0, 0, 0, 1, 0, 0, 0, 1};
|
|
if ((!mathEqual(width, vw) || !mathEqual(height, vh)) && vw > 0 && vh > 0) {
|
|
Box box = {symbol.vx, symbol.vy, vw, vh};
|
|
mViewBox = _calculateAspectRatioMatrix(symbol.align, symbol.meetOrSlice, width, height, box);
|
|
} else if (!mathZero(symbol.vx) || !mathZero(symbol.vy)) {
|
|
mViewBox = {1, 0, -symbol.vx, 0, 1, -symbol.vy, 0, 0, 1};
|
|
}
|
|
|
|
// mSceneTransform = mUseTransform * mSymbolTransform * mViewBox
|
|
Matrix mSceneTransform = mViewBox;
|
|
if (node->node.use.symbol->transform) {
|
|
mSceneTransform = mathMultiply(node->node.use.symbol->transform, &mViewBox);
|
|
}
|
|
mSceneTransform = mathMultiply(&mUseTransform, &mSceneTransform);
|
|
scene->transform(mSceneTransform);
|
|
|
|
if (node->node.use.symbol->node.symbol.overflowVisible) {
|
|
finalScene = move(scene);
|
|
} else {
|
|
auto viewBoxClip = Shape::gen();
|
|
viewBoxClip->appendRect(0, 0, width, height, 0, 0);
|
|
|
|
// mClipTransform = mUseTransform * mSymbolTransform
|
|
Matrix mClipTransform = mUseTransform;
|
|
if (node->node.use.symbol->transform) {
|
|
mClipTransform = mathMultiply(&mUseTransform, node->node.use.symbol->transform);
|
|
}
|
|
viewBoxClip->transform(mClipTransform);
|
|
|
|
auto compositeLayer = Scene::gen();
|
|
compositeLayer->composite(move(viewBoxClip), CompositeMethod::ClipPath);
|
|
compositeLayer->push(move(scene));
|
|
|
|
auto root = Scene::gen();
|
|
root->push(move(compositeLayer));
|
|
|
|
finalScene = move(root);
|
|
}
|
|
} else {
|
|
if (!mathIdentity((const Matrix*)(&mUseTransform))) scene->transform(mUseTransform);
|
|
finalScene = move(scene);
|
|
}
|
|
|
|
return finalScene;
|
|
}
|
|
|
|
|
|
static unique_ptr<Scene> _sceneBuildHelper(const SvgNode* node, const Box& vBox, const string& svgPath, bool mask, int depth, bool* isMaskWhite)
|
|
{
|
|
/* Exception handling: Prevent invalid SVG data input.
|
|
The size is the arbitrary value, we need an experimental size. */
|
|
if (depth > 2192) {
|
|
TVGERR("SVG", "Infinite recursive call - stopped after %d calls! Svg file may be incorrectly formatted.", depth);
|
|
return nullptr;
|
|
}
|
|
|
|
if (_isGroupType(node->type) || mask) {
|
|
auto scene = Scene::gen();
|
|
// For a Symbol node, the viewBox transformation has to be applied first - see _useBuildHelper()
|
|
if (!mask && node->transform && node->type != SvgNodeType::Symbol) scene->transform(*node->transform);
|
|
|
|
if (node->display && node->style->opacity != 0) {
|
|
auto child = node->child.data;
|
|
for (uint32_t i = 0; i < node->child.count; ++i, ++child) {
|
|
if (_isGroupType((*child)->type)) {
|
|
if ((*child)->type == SvgNodeType::Use)
|
|
scene->push(_useBuildHelper(*child, vBox, svgPath, depth + 1, isMaskWhite));
|
|
else
|
|
scene->push(_sceneBuildHelper(*child, vBox, svgPath, false, depth + 1, isMaskWhite));
|
|
} else if ((*child)->type == SvgNodeType::Image) {
|
|
auto image = _imageBuildHelper(*child, vBox, svgPath);
|
|
if (image) {
|
|
scene->push(move(image));
|
|
if (isMaskWhite) *isMaskWhite = false;
|
|
}
|
|
} else if ((*child)->type != SvgNodeType::Mask) {
|
|
auto shape = _shapeBuildHelper(*child, vBox, svgPath);
|
|
if (shape) {
|
|
if (isMaskWhite) {
|
|
uint8_t r, g, b;
|
|
shape->fillColor(&r, &g, &b, nullptr);
|
|
if (shape->fill() || r < 255 || g < 255 || b < 255 || shape->strokeFill() ||
|
|
(shape->strokeColor(&r, &g, &b, nullptr) == Result::Success && (r < 255 || g < 255 || b < 255))) {
|
|
*isMaskWhite = false;
|
|
}
|
|
}
|
|
scene->push(move(shape));
|
|
}
|
|
}
|
|
}
|
|
_applyComposition(scene.get(), node, vBox, svgPath);
|
|
scene->opacity(node->style->opacity);
|
|
}
|
|
return scene;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
static void _applySvgViewFlag(const Scene* scene, float& vx, float& vy, float& vw, float& vh, float& w, float& h, SvgViewFlag viewFlag)
|
|
{
|
|
bool noViewbox = !(viewFlag & SvgViewFlag::Viewbox);
|
|
bool noWidth = !(viewFlag & SvgViewFlag::Width);
|
|
bool noHeight = !(viewFlag & SvgViewFlag::Height);
|
|
|
|
if (noViewbox) {
|
|
float x, y;
|
|
scene->bounds(&x, &y, &vw, &vh, false);
|
|
if (noWidth && noHeight) {
|
|
vx = x;
|
|
vy = y;
|
|
} else {
|
|
vw = noWidth ? vw : w;
|
|
vh = noHeight ? vh : h;
|
|
}
|
|
}
|
|
w = noWidth ? vw : w;
|
|
h = noHeight ? vh : h;
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* External Class Implementation */
|
|
/************************************************************************/
|
|
|
|
unique_ptr<Scene> svgSceneBuild(SvgNode* node, float& vx, float& vy, float& vw, float& vh, float& w, float& h, AspectRatioAlign align, AspectRatioMeetOrSlice meetOrSlice, const string& svgPath, SvgViewFlag viewFlag)
|
|
{
|
|
//TODO: aspect ratio is valid only if viewBox was set
|
|
|
|
if (!node || (node->type != SvgNodeType::Doc)) return nullptr;
|
|
|
|
Box vBox = {vx, vy, vw, vh};
|
|
auto docNode = _sceneBuildHelper(node, vBox, svgPath, false, 0);
|
|
_applySvgViewFlag(docNode.get(), vx, vy, vw, vh, w, h, viewFlag);
|
|
|
|
if (!mathEqual(w, vw) || !mathEqual(h, vh)) {
|
|
Matrix m = _calculateAspectRatioMatrix(align, meetOrSlice, w, h, {vx, vy, vw, vh});
|
|
docNode->transform(m);
|
|
} else if (!mathZero(vx) || !mathZero(vy)) {
|
|
docNode->translate(-vx, -vy);
|
|
}
|
|
|
|
auto viewBoxClip = Shape::gen();
|
|
viewBoxClip->appendRect(0, 0, w, h, 0, 0);
|
|
viewBoxClip->fill(0, 0, 0, 255);
|
|
|
|
auto compositeLayer = Scene::gen();
|
|
compositeLayer->composite(move(viewBoxClip), CompositeMethod::ClipPath);
|
|
compositeLayer->push(move(docNode));
|
|
|
|
auto root = Scene::gen();
|
|
root->push(move(compositeLayer));
|
|
|
|
return root;
|
|
}
|