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https://github.com/thorvg/thorvg.git
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6dd414ee3b
We have encountered that multi-threading usage that user creates,
multiple canvases owned by multiple user threads.
Current sw_engine memory pool has been considered only for multi-threads,
spawned by tvg task scheduler.
In this case it's safe but when user threads introduced, it can occur race-condition.
Thus, Here is a renewal policy that non-threading tvg(initialized threads with zero),
takes care of multiple user threads bu changing its policy,
each of canvases should have individual memory pool to guarantee mutual-exclusion.
@API additions
enum MempoolPolicy
{
Default = 0, ///< Default behavior that ThorVG is designed to.
Shareable, ///< Memory Pool is shared among the SwCanvases.
Individual ///< Allocate designated memory pool that is only used by current instance.
};
Result SwCanvas::mempool(MempoolPolicy policy) noexcept;
All in all, if user calls multiple threads, set memory pool policy to Individual.
112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
/*
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* Copyright (c) 2020-2021 Samsung Electronics Co., Ltd. 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 <algorithm>
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#include "tvgSwCommon.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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static bool _genOutline(SwImage* image, const Picture* pdata, const Matrix* transform, SwMpool* mpool, unsigned tid)
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{
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float w, h;
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pdata->viewbox(nullptr, nullptr, &w, &h);
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if (w == 0 || h == 0) return false;
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image->outline = mpoolReqOutline(mpool, tid);
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auto outline = image->outline;
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outline->reservedPtsCnt = 5;
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outline->pts = static_cast<SwPoint*>(realloc(outline->pts, outline->reservedPtsCnt * sizeof(SwPoint)));
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outline->types = static_cast<uint8_t*>(realloc(outline->types, outline->reservedPtsCnt * sizeof(uint8_t)));
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outline->reservedCntrsCnt = 1;
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outline->cntrs = static_cast<uint32_t*>(realloc(outline->cntrs, outline->reservedCntrsCnt * sizeof(uint32_t)));
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Point to[4] = {{0 ,0}, {w, 0}, {w, h}, {0, h}};
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for (int i = 0; i < 4; i++) {
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outline->pts[outline->ptsCnt] = mathTransform(&to[i], transform);
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outline->types[outline->ptsCnt] = SW_CURVE_TYPE_POINT;
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++outline->ptsCnt;
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}
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outline->pts[outline->ptsCnt] = outline->pts[0];
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outline->types[outline->ptsCnt] = SW_CURVE_TYPE_POINT;
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++outline->ptsCnt;
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outline->cntrs[outline->cntrsCnt] = outline->ptsCnt - 1;
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++outline->cntrsCnt;
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outline->opened = false;
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image->outline = outline;
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image->w = w;
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image->h = h;
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return true;
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}
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/************************************************************************/
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/* External Class Implementation */
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/************************************************************************/
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bool imagePrepare(SwImage* image, const Picture* pdata, const Matrix* transform, const SwBBox& clipRegion, SwBBox& renderRegion, SwMpool* mpool, unsigned tid)
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{
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if (!_genOutline(image, pdata, transform, mpool, tid)) return false;
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return mathUpdateOutlineBBox(image->outline, clipRegion, renderRegion);
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}
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bool imagePrepared(const SwImage* image)
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{
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return image->rle ? true : false;
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}
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bool imageGenRle(SwImage* image, TVG_UNUSED const Picture* pdata, const SwBBox& renderRegion, bool antiAlias)
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{
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if ((image->rle = rleRender(image->rle, image->outline, renderRegion, antiAlias))) return true;
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return false;
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}
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void imageDelOutline(SwImage* image, SwMpool* mpool, uint32_t tid)
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{
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mpoolRetOutline(mpool, tid);
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image->outline = nullptr;
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}
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void imageReset(SwImage* image)
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{
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rleReset(image->rle);
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image->rle = nullptr;
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}
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void imageFree(SwImage* image)
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{
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rleFree(image->rle);
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}
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