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https://github.com/thorvg/thorvg.git
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f573e1390f
The 'Paint' function now includes an internal stroking option, allowing the bounding box to be calculated with or without the stroke size taken into account. This feature is particularly useful for SVG loaders, and we might consider making the interface available for user demands in the future.
311 lines
9.9 KiB
C++
311 lines
9.9 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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#ifndef _TVG_PICTURE_IMPL_H_
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#define _TVG_PICTURE_IMPL_H_
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#include <string>
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#include "tvgPaint.h"
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#include "tvgLoader.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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struct PictureIterator : Iterator
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{
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Paint* paint = nullptr;
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Paint* ptr = nullptr;
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PictureIterator(Paint* p) : paint(p) {}
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const Paint* next() override
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{
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if (!ptr) ptr = paint;
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else ptr = nullptr;
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return ptr;
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}
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uint32_t count() override
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{
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if (paint) return 1;
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else return 0;
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}
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void begin() override
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{
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ptr = nullptr;
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}
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};
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struct Picture::Impl
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{
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shared_ptr<LoadModule> loader = nullptr;
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Paint* paint = nullptr; //vector picture uses
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Surface* surface = nullptr; //bitmap picture uses
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RenderData rd = nullptr; //engine data
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float w = 0, h = 0;
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RenderMesh rm; //mesh data
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Picture* picture = nullptr;
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bool resizing = false;
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bool needComp = false; //need composition
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Impl(Picture* p) : picture(p)
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{
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}
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~Impl()
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{
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delete(paint);
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delete(surface);
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}
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bool dispose(RenderMethod& renderer)
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{
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if (paint) paint->pImpl->dispose(renderer);
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else if (surface) renderer.dispose(rd);
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rd = nullptr;
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return true;
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}
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RenderTransform resizeTransform(const RenderTransform* pTransform)
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{
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//Overriding Transformation by the desired image size
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auto sx = w / loader->w;
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auto sy = h / loader->h;
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auto scale = sx < sy ? sx : sy;
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RenderTransform tmp;
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tmp.m = {scale, 0, 0, 0, scale, 0, 0, 0, 1};
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if (!pTransform) return tmp;
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else return RenderTransform(pTransform, &tmp);
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}
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bool needComposition(uint8_t opacity)
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{
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//In this case, paint(scene) would try composition itself.
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if (opacity < 255) return false;
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//Composition test
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const Paint* target;
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auto method = picture->composite(&target);
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if (!target || method == tvg::CompositeMethod::ClipPath) return false;
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if (target->pImpl->opacity == 255 || target->pImpl->opacity == 0) return false;
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return true;
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}
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RenderData update(RenderMethod &renderer, const RenderTransform* pTransform, Array<RenderData>& clips, uint8_t opacity, RenderUpdateFlag pFlag, bool clipper)
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{
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auto flag = load();
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if (surface) {
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auto transform = resizeTransform(pTransform);
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rd = renderer.prepare(surface, &rm, rd, &transform, clips, opacity, static_cast<RenderUpdateFlag>(pFlag | flag));
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} else if (paint) {
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if (resizing) {
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loader->resize(paint, w, h);
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resizing = false;
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}
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needComp = needComposition(opacity) ? true : false;
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rd = paint->pImpl->update(renderer, pTransform, clips, opacity, static_cast<RenderUpdateFlag>(pFlag | flag), clipper);
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}
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return rd;
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}
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bool render(RenderMethod &renderer)
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{
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bool ret = false;
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if (surface) return renderer.renderImage(rd);
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else if (paint) {
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Compositor* cmp = nullptr;
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if (needComp) {
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cmp = renderer.target(bounds(renderer), renderer.colorSpace());
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renderer.beginComposite(cmp, CompositeMethod::None, 255);
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}
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ret = paint->pImpl->render(renderer);
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if (cmp) renderer.endComposite(cmp);
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}
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return ret;
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}
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bool size(float w, float h)
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{
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this->w = w;
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this->h = h;
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resizing = true;
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return true;
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}
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bool bounds(float* x, float* y, float* w, float* h, bool stroking)
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{
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if (rm.triangleCnt > 0) {
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auto triangles = rm.triangles;
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auto min = triangles[0].vertex[0].pt;
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auto max = triangles[0].vertex[0].pt;
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for (uint32_t i = 0; i < rm.triangleCnt; ++i) {
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if (triangles[i].vertex[0].pt.x < min.x) min.x = triangles[i].vertex[0].pt.x;
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else if (triangles[i].vertex[0].pt.x > max.x) max.x = triangles[i].vertex[0].pt.x;
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if (triangles[i].vertex[0].pt.y < min.y) min.y = triangles[i].vertex[0].pt.y;
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else if (triangles[i].vertex[0].pt.y > max.y) max.y = triangles[i].vertex[0].pt.y;
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if (triangles[i].vertex[1].pt.x < min.x) min.x = triangles[i].vertex[1].pt.x;
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else if (triangles[i].vertex[1].pt.x > max.x) max.x = triangles[i].vertex[1].pt.x;
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if (triangles[i].vertex[1].pt.y < min.y) min.y = triangles[i].vertex[1].pt.y;
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else if (triangles[i].vertex[1].pt.y > max.y) max.y = triangles[i].vertex[1].pt.y;
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if (triangles[i].vertex[2].pt.x < min.x) min.x = triangles[i].vertex[2].pt.x;
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else if (triangles[i].vertex[2].pt.x > max.x) max.x = triangles[i].vertex[2].pt.x;
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if (triangles[i].vertex[2].pt.y < min.y) min.y = triangles[i].vertex[2].pt.y;
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else if (triangles[i].vertex[2].pt.y > max.y) max.y = triangles[i].vertex[2].pt.y;
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}
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if (x) *x = min.x;
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if (y) *y = min.y;
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if (w) *w = max.x - min.x;
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if (h) *h = max.y - min.y;
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} else {
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if (x) *x = 0;
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if (y) *y = 0;
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if (w) *w = this->w;
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if (h) *h = this->h;
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}
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return true;
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}
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RenderRegion bounds(RenderMethod& renderer)
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{
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if (rd) return renderer.region(rd);
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if (paint) return paint->pImpl->bounds(renderer);
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return {0, 0, 0, 0};
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}
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Result load(const string& path)
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{
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if (paint || surface) return Result::InsufficientCondition;
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if (loader) loader->close();
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bool invalid; //Invalid Path
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loader = LoaderMgr::loader(path, &invalid);
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if (!loader) {
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if (invalid) return Result::InvalidArguments;
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return Result::NonSupport;
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}
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if (!loader->read()) return Result::Unknown;
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w = loader->w;
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h = loader->h;
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return Result::Success;
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}
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Result load(const char* data, uint32_t size, const string& mimeType, bool copy)
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{
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if (paint || surface) return Result::InsufficientCondition;
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if (loader) loader->close();
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loader = LoaderMgr::loader(data, size, mimeType, copy);
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if (!loader) return Result::NonSupport;
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if (!loader->read()) return Result::Unknown;
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w = loader->w;
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h = loader->h;
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return Result::Success;
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}
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Result load(uint32_t* data, uint32_t w, uint32_t h, bool copy)
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{
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if (paint || surface) return Result::InsufficientCondition;
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if (loader) loader->close();
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loader = LoaderMgr::loader(data, w, h, copy);
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if (!loader) return Result::FailedAllocation;
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this->w = loader->w;
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this->h = loader->h;
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return Result::Success;
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}
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void mesh(const Polygon* triangles, const uint32_t triangleCnt)
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{
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if (triangles && triangleCnt > 0) {
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this->rm.triangleCnt = triangleCnt;
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this->rm.triangles = (Polygon*)malloc(sizeof(Polygon) * triangleCnt);
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memcpy(this->rm.triangles, triangles, sizeof(Polygon) * triangleCnt);
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} else {
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free(this->rm.triangles);
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this->rm.triangles = nullptr;
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this->rm.triangleCnt = 0;
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}
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}
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Paint* duplicate()
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{
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load();
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auto ret = Picture::gen();
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auto dup = ret.get()->pImpl;
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if (paint) dup->paint = paint->duplicate();
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dup->loader = loader;
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if (surface) {
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dup->surface = new Surface;
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*dup->surface = *surface;
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//TODO: A dupilcation is not a proxy... it needs copy of the pixel data?
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dup->surface->owner = false;
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}
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dup->w = w;
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dup->h = h;
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dup->resizing = resizing;
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if (rm.triangleCnt > 0) {
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dup->rm.triangleCnt = rm.triangleCnt;
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dup->rm.triangles = (Polygon*)malloc(sizeof(Polygon) * rm.triangleCnt);
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memcpy(dup->rm.triangles, rm.triangles, sizeof(Polygon) * rm.triangleCnt);
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}
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return ret.release();
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}
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Iterator* iterator()
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{
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load();
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return new PictureIterator(paint);
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}
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uint32_t* data(uint32_t* w, uint32_t* h)
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{
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//Try it, If not loaded yet.
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load();
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if (loader) {
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if (w) *w = static_cast<uint32_t>(loader->w);
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if (h) *h = static_cast<uint32_t>(loader->h);
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} else {
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if (w) *w = 0;
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if (h) *h = 0;
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}
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if (surface) return surface->buf32;
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else return nullptr;
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}
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RenderUpdateFlag load();
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};
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#endif //_TVG_PICTURE_IMPL_H_
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