mirror of
https://github.com/thorvg/thorvg.git
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e293d73f11
If a clip was defined by a use node pointing to a basic shape subject to transformation, and the use node itself was translated, the order of applying these transformations was incorrect.
942 lines
36 KiB
C++
942 lines
36 KiB
C++
/*
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* Copyright (c) 2020 - 2024 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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#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 "tvgShape.h"
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#include "tvgCompressor.h"
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#include "tvgPaint.h"
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#include "tvgFill.h"
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#include "tvgStr.h"
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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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static bool _appendShape(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath);
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static bool _appendClipShape(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath, const Matrix* transform);
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static unique_ptr<Scene> _sceneBuildHelper(SvgLoaderData& loaderData, 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 Box _boundingBox(const Text* text)
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{
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float x, y, w, h;
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text->bounds(&x, &y, &w, &h, false);
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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 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[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 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 scaling 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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g->radial->fr = g->radial->fr * sqrtf(powf(vBox.w, 2.0f) + powf(vBox.h, 2.0f)) / sqrtf(2.0f);
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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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P(fillGrad)->radial(g->radial->cx, g->radial->cy, g->radial->r, g->radial->fx, g->radial->fy, g->radial->fr);
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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[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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//The SVG standard allows only for 'use' nodes that point directly to a basic shape.
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static bool _appendClipUseNode(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath)
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{
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if (node->child.count != 1) return false;
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auto child = *(node->child.data);
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Matrix finalTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
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if (node->transform) finalTransform = *node->transform;
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if (node->node.use.x != 0.0f || node->node.use.y != 0.0f) {
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Matrix m = {1, 0, node->node.use.x, 0, 1, node->node.use.y, 0, 0, 1};
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finalTransform *= m;
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}
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if (child->transform) finalTransform *= *child->transform;
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return _appendClipShape(loaderData, child, shape, vBox, svgPath, identity((const Matrix*)(&finalTransform)) ? nullptr : &finalTransform);
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}
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static bool _appendClipChild(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath, bool clip)
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{
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if (node->type == SvgNodeType::Use) {
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return _appendClipUseNode(loaderData, node, shape, vBox, svgPath);
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}
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return _appendClipShape(loaderData, node, shape, vBox, svgPath, nullptr);
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}
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static Matrix _compositionTransform(Paint* paint, const SvgNode* node, const SvgNode* compNode, SvgNodeType type)
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{
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Matrix m = {1, 0, 0, 0, 1, 0, 0, 0, 1};
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//The initial mask transformation ignored according to the SVG standard.
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if (node->transform && type != SvgNodeType::Mask) {
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m = *node->transform;
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}
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if (compNode->transform) {
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m *= *compNode->transform;
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}
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if (!compNode->node.clip.userSpace) {
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float x, y, w, h;
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P(paint)->bounds(&x, &y, &w, &h, false, false);
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Matrix mBBox = {w, 0, x, 0, h, y, 0, 0, 1};
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m *= mBBox;
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}
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return m;
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}
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static void _applyComposition(SvgLoaderData& loaderData, 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 exist
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for (uint32_t i = 0; i < compNode->child.count; ++i, ++child) {
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if (_appendClipChild(loaderData, *child, comp.get(), vBox, svgPath, compNode->child.count > 1)) valid = true;
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}
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if (valid) {
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Matrix finalTransform = _compositionTransform(paint, node, compNode, SvgNodeType::ClipPath);
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comp->transform(finalTransform);
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paint->clip(std::move(comp));
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}
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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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if (auto comp = _sceneBuildHelper(loaderData, compNode, vBox, svgPath, true, 0, &isMaskWhite)) {
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if (!compNode->node.mask.userSpace) {
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Matrix finalTransform = _compositionTransform(paint, node, compNode, SvgNodeType::Mask);
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comp->transform(finalTransform);
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} else {
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if (node->transform) comp->transform(*node->transform);
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}
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if (compNode->node.mask.type == SvgMaskType::Luminance && !isMaskWhite) {
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paint->composite(std::move(comp), CompositeMethod::LumaMask);
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} else {
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paint->composite(std::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(SvgLoaderData& loaderData, SvgNode* node, Shape* vg, const Box& vBox, const string& svgPath, bool clip)
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{
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SvgStyleProperty* style = node->style;
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//Clip transformation is applied directly to the path in the _appendClipShape function
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if (node->transform && !clip) vg->transform(*node->transform);
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if (node->type == SvgNodeType::Doc || !node->style->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, bBox, style->fill.opacity);
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vg->fill(std::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, bBox, style->fill.opacity);
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vg->fill(std::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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TVGLOG("SVG", "The fill's url not supported.");
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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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vg->strokeMiterlimit(style->stroke.miterlimit);
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if (style->stroke.dash.array.count > 0) {
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P(vg)->strokeDash(style->stroke.dash.array.data, style->stroke.dash.array.count, style->stroke.dash.offset);
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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, bBox, style->stroke.opacity);
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vg->stroke(std::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, bBox, style->stroke.opacity);
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vg->stroke(std::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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TVGLOG("SVG", "The stroke's url not supported.");
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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(loaderData, vg, node, vBox, svgPath);
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}
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static unique_ptr<Shape> _shapeBuildHelper(SvgLoaderData& loaderData, 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(loaderData, node, shape.get(), vBox, svgPath)) return shape;
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else return nullptr;
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}
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static bool _recognizeShape(SvgNode* node, Shape* shape)
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{
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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 (!svgPathToShape(node->node.path.path, shape)) {
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TVGERR("SVG", "Invalid path information.");
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return false;
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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.pts.count < 2) break;
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auto pts = node->node.polygon.pts.begin();
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shape->moveTo(pts[0], pts[1]);
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for (pts += 2; pts < node->node.polygon.pts.end(); pts += 2) {
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shape->lineTo(pts[0], pts[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.polyline.pts.count < 2) break;
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auto pts = node->node.polyline.pts.begin();
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shape->moveTo(pts[0], pts[1]);
|
|
for (pts += 2; pts < node->node.polyline.pts.end(); pts += 2) {
|
|
shape->lineTo(pts[0], pts[1]);
|
|
}
|
|
break;
|
|
}
|
|
case SvgNodeType::Circle: {
|
|
shape->appendCircle(node->node.circle.cx, node->node.circle.cy, node->node.circle.r, node->node.circle.r);
|
|
break;
|
|
}
|
|
case SvgNodeType::Rect: {
|
|
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);
|
|
break;
|
|
}
|
|
case SvgNodeType::Line: {
|
|
shape->moveTo(node->node.line.x1, node->node.line.y1);
|
|
shape->lineTo(node->node.line.x2, node->node.line.y2);
|
|
break;
|
|
}
|
|
default: {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
static bool _appendShape(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath)
|
|
{
|
|
if (!_recognizeShape(node, shape)) return false;
|
|
|
|
_applyProperty(loaderData, node, shape, vBox, svgPath, false);
|
|
return true;
|
|
}
|
|
|
|
|
|
static bool _appendClipShape(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath, const Matrix* transform)
|
|
{
|
|
//The 'transform' matrix has higher priority than the node->transform, since it already contains it
|
|
auto m = transform ? transform : (node->transform ? node->transform : nullptr);
|
|
|
|
uint32_t currentPtsCnt = 0;
|
|
if (m) {
|
|
const Point *tmp = nullptr;
|
|
currentPtsCnt = shape->pathCoords(&tmp);
|
|
}
|
|
|
|
if (!_recognizeShape(node, shape)) return false;
|
|
|
|
if (m) {
|
|
const Point *pts = nullptr;
|
|
auto ptsCnt = shape->pathCoords(&pts);
|
|
|
|
auto p = const_cast<Point*>(pts) + currentPtsCnt;
|
|
while (currentPtsCnt++ < ptsCnt) {
|
|
*p *= *m;
|
|
++p;
|
|
}
|
|
}
|
|
|
|
_applyProperty(loaderData, node, shape, vBox, svgPath, true);
|
|
return true;
|
|
}
|
|
|
|
|
|
enum class imageMimeTypeEncoding
|
|
{
|
|
base64 = 0x1,
|
|
utf8 = 0x2
|
|
};
|
|
|
|
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},
|
|
{"webp", sizeof("webp"), 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;
|
|
}
|
|
|
|
#include "tvgTaskScheduler.h"
|
|
|
|
static unique_ptr<Picture> _imageBuildHelper(SvgLoaderData& loaderData, SvgNode* node, const Box& vBox, const string& svgPath)
|
|
{
|
|
if (!node->node.image.href || !strlen(node->node.image.href)) return nullptr;
|
|
auto picture = Picture::gen();
|
|
|
|
TaskScheduler::async(false); //force to load a picture on the same thread
|
|
|
|
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
|
|
char *decoded = nullptr;
|
|
if (encoding == imageMimeTypeEncoding::base64) {
|
|
auto size = b64Decode(href, strlen(href), &decoded);
|
|
if (picture->load(decoded, size, mimetype, false) != Result::Success) {
|
|
free(decoded);
|
|
TaskScheduler::async(true);
|
|
return nullptr;
|
|
}
|
|
} else {
|
|
auto size = svgUtilURLDecode(href, &decoded);
|
|
if (picture->load(decoded, size, mimetype, false) != Result::Success) {
|
|
free(decoded);
|
|
TaskScheduler::async(true);
|
|
return nullptr;
|
|
}
|
|
}
|
|
loaderData.images.push(decoded);
|
|
} 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.");
|
|
TaskScheduler::async(true);
|
|
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) {
|
|
TaskScheduler::async(true);
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
TaskScheduler::async(true);
|
|
|
|
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 = *node->transform * m;
|
|
picture->transform(m);
|
|
|
|
_applyComposition(loaderData, 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(SvgLoaderData& loaderData, const SvgNode* node, const Box& vBox, const string& svgPath, int depth, bool* isMaskWhite)
|
|
{
|
|
auto scene = _sceneBuildHelper(loaderData, 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 *= 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 ((!tvg::equal(width, vw) || !tvg::equal(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 (!tvg::zero(symbol.vx) || !tvg::zero(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 = *node->node.use.symbol->transform * mViewBox;
|
|
}
|
|
mSceneTransform = mUseTransform * mSceneTransform;
|
|
scene->transform(mSceneTransform);
|
|
|
|
if (!node->node.use.symbol->node.symbol.overflowVisible) {
|
|
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 = mUseTransform * *node->node.use.symbol->transform;
|
|
}
|
|
viewBoxClip->transform(mClipTransform);
|
|
|
|
scene->clip(std::move(viewBoxClip));
|
|
}
|
|
} else {
|
|
scene->transform(mUseTransform);
|
|
}
|
|
|
|
return scene;
|
|
}
|
|
|
|
|
|
static void _applyTextFill(SvgStyleProperty* style, Text* text, const Box& vBox)
|
|
{
|
|
//If fill property is nullptr then do nothing
|
|
if (style->fill.paint.none) {
|
|
//Do nothing
|
|
} else if (style->fill.paint.gradient) {
|
|
Box bBox = vBox;
|
|
if (!style->fill.paint.gradient->userSpace) bBox = _boundingBox(text);
|
|
|
|
if (style->fill.paint.gradient->type == SvgGradientType::Linear) {
|
|
auto linear = _applyLinearGradientProperty(style->fill.paint.gradient, bBox, style->fill.opacity);
|
|
text->fill(std::move(linear));
|
|
} else if (style->fill.paint.gradient->type == SvgGradientType::Radial) {
|
|
auto radial = _applyRadialGradientProperty(style->fill.paint.gradient, bBox, style->fill.opacity);
|
|
text->fill(std::move(radial));
|
|
}
|
|
} else if (style->fill.paint.url) {
|
|
//TODO: Apply the color pointed by url
|
|
TVGLOG("SVG", "The fill's url not supported.");
|
|
} else if (style->fill.paint.curColor) {
|
|
//Apply the current style color
|
|
text->fill(style->color.r, style->color.g, style->color.b);
|
|
text->opacity(style->fill.opacity);
|
|
} else {
|
|
//Apply the fill color
|
|
text->fill(style->fill.paint.color.r, style->fill.paint.color.g, style->fill.paint.color.b);
|
|
text->opacity(style->fill.opacity);
|
|
}
|
|
}
|
|
|
|
|
|
static unique_ptr<Text> _textBuildHelper(SvgLoaderData& loaderData, const SvgNode* node, const Box& vBox, const string& svgPath)
|
|
{
|
|
auto textNode = &node->node.text;
|
|
if (!textNode->text) return nullptr;
|
|
auto text = Text::gen();
|
|
|
|
Matrix textTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
|
|
if (node->transform) textTransform = *node->transform;
|
|
translateR(&textTransform, node->node.text.x, node->node.text.y - textNode->fontSize);
|
|
text->transform(textTransform);
|
|
|
|
//TODO: handle def values of font and size as used in a system?
|
|
const float ptPerPx = 0.75f; //1 pt = 1/72; 1 in = 96 px; -> 72/96 = 0.75
|
|
auto fontSizePt = textNode->fontSize * ptPerPx;
|
|
if (textNode->fontFamily) text->font(textNode->fontFamily, fontSizePt);
|
|
text->text(textNode->text);
|
|
|
|
_applyTextFill(node->style, text.get(), vBox);
|
|
_applyComposition(loaderData, text.get(), node, vBox, svgPath);
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
static unique_ptr<Scene> _sceneBuildHelper(SvgLoaderData& loaderData, 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->style->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(loaderData, *child, vBox, svgPath, depth + 1, isMaskWhite));
|
|
else if (!((*child)->type == SvgNodeType::Symbol && node->type != SvgNodeType::Use))
|
|
scene->push(_sceneBuildHelper(loaderData, *child, vBox, svgPath, false, depth + 1, isMaskWhite));
|
|
} else if ((*child)->type == SvgNodeType::Image) {
|
|
auto image = _imageBuildHelper(loaderData, *child, vBox, svgPath);
|
|
if (image) {
|
|
scene->push(std::move(image));
|
|
if (isMaskWhite) *isMaskWhite = false;
|
|
}
|
|
} else if ((*child)->type == SvgNodeType::Text) {
|
|
auto text = _textBuildHelper(loaderData, *child, vBox, svgPath);
|
|
if (text) scene->push(std::move(text));
|
|
} else if ((*child)->type != SvgNodeType::Mask) {
|
|
auto shape = _shapeBuildHelper(loaderData, *child, vBox, svgPath);
|
|
if (shape) {
|
|
if (isMaskWhite) {
|
|
uint8_t r, g, b;
|
|
shape->fillColor(&r, &g, &b);
|
|
if (shape->fill() || r < 255 || g < 255 || b < 255 || shape->strokeFill() ||
|
|
(shape->strokeColor(&r, &g, &b) == Result::Success && (r < 255 || g < 255 || b < 255))) {
|
|
*isMaskWhite = false;
|
|
}
|
|
}
|
|
scene->push(std::move(shape));
|
|
}
|
|
}
|
|
}
|
|
_applyComposition(loaderData, scene.get(), node, vBox, svgPath);
|
|
scene->opacity(node->style->opacity);
|
|
}
|
|
return scene;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
static void _updateInvalidViewSize(const Scene* scene, Box& vBox, float& w, float& h, SvgViewFlag viewFlag)
|
|
{
|
|
bool validWidth = (viewFlag & SvgViewFlag::Width);
|
|
bool validHeight = (viewFlag & SvgViewFlag::Height);
|
|
|
|
float x, y;
|
|
scene->bounds(&x, &y, &vBox.w, &vBox.h, false);
|
|
if (!validWidth && !validHeight) {
|
|
vBox.x = x;
|
|
vBox.y = y;
|
|
} else {
|
|
if (validWidth) vBox.w = w;
|
|
if (validHeight) vBox.h = h;
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}
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|
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//the size would have 1x1 or percentage values.
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if (!validWidth) w *= vBox.w;
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if (!validHeight) h *= vBox.h;
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}
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|
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/************************************************************************/
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|
/* External Class Implementation */
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/************************************************************************/
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|
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Scene* svgSceneBuild(SvgLoaderData& loaderData, Box vBox, float w, float h, AspectRatioAlign align, AspectRatioMeetOrSlice meetOrSlice, const string& svgPath, SvgViewFlag viewFlag)
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|
{
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|
//TODO: aspect ratio is valid only if viewBox was set
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|
|
|
if (!loaderData.doc || (loaderData.doc->type != SvgNodeType::Doc)) return nullptr;
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|
|
|
auto docNode = _sceneBuildHelper(loaderData, loaderData.doc, vBox, svgPath, false, 0);
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|
|
|
if (!(viewFlag & SvgViewFlag::Viewbox)) _updateInvalidViewSize(docNode.get(), vBox, w, h, viewFlag);
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|
|
|
if (!tvg::equal(w, vBox.w) || !tvg::equal(h, vBox.h)) {
|
|
Matrix m = _calculateAspectRatioMatrix(align, meetOrSlice, w, h, vBox);
|
|
docNode->transform(m);
|
|
} else if (!tvg::zero(vBox.x) || !tvg::zero(vBox.y)) {
|
|
docNode->translate(-vBox.x, -vBox.y);
|
|
}
|
|
|
|
auto viewBoxClip = Shape::gen();
|
|
viewBoxClip->appendRect(0, 0, w, h);
|
|
|
|
auto compositeLayer = Scene::gen();
|
|
compositeLayer->clip(std::move(viewBoxClip));
|
|
compositeLayer->push(std::move(docNode));
|
|
|
|
auto root = Scene::gen();
|
|
root->push(std::move(compositeLayer));
|
|
|
|
loaderData.doc->node.doc.vx = vBox.x;
|
|
loaderData.doc->node.doc.vy = vBox.y;
|
|
loaderData.doc->node.doc.vw = vBox.w;
|
|
loaderData.doc->node.doc.vh = vBox.h;
|
|
loaderData.doc->node.doc.w = w;
|
|
loaderData.doc->node.doc.h = h;
|
|
|
|
return root.release();
|
|
}
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