mirror of
https://github.com/thorvg/thorvg.git
synced 2025-06-09 06:04:03 +00:00
c31156e737
tvg sw_engine tries to skip composition as far as its doable, it tries composition only if the translucent shape with stroking is there. There has been a condition bug that composition is applied unnecessarily even if stroking is disabled. This resulted in broken blending at gradient filling since it applied alpha values multiple times. Issues: https://github.com/Samsung/thorvg/issues/445
652 lines
18 KiB
C++
652 lines
18 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 <math.h>
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#include "tvgSwCommon.h"
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#include "tvgTaskScheduler.h"
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#include "tvgSwRenderer.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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static int32_t initEngineCnt = false;
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static int32_t rendererCnt = 0;
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static SwMpool* globalMpool = nullptr;
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static uint32_t threadsCnt = 0;
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struct SwTask : Task
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{
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Matrix* transform = nullptr;
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SwSurface* surface = nullptr;
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SwMpool* mpool = nullptr;
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RenderUpdateFlag flags = RenderUpdateFlag::None;
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Array<RenderData> clips;
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uint32_t opacity;
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SwBBox bbox = {{0, 0}, {0, 0}}; //Whole Rendering Region
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RenderRegion bounds() const
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{
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RenderRegion region;
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//Range over?
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region.x = bbox.min.x > 0 ? bbox.min.x : 0;
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region.y = bbox.min.y > 0 ? bbox.min.y : 0;
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region.w = bbox.max.x - region.x;
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region.h = bbox.max.y - region.y;
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return region;
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}
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virtual bool dispose() = 0;
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};
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struct SwShapeTask : SwTask
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{
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SwShape shape;
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const Shape* sdata = nullptr;
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bool cmpStroking;
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void run(unsigned tid) override
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{
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if (opacity == 0) return; //Invisible
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/* Valid filling & stroking each increases the value by 1.
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This value is referenced for compositing shape & stroking. */
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bool stroking = false;
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bool filling = false;
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//Valid Stroking?
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uint8_t strokeAlpha = 0;
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auto strokeWidth = sdata->strokeWidth();
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if (HALF_STROKE(strokeWidth) > 0) {
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sdata->strokeColor(nullptr, nullptr, nullptr, &strokeAlpha);
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}
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bool validStroke = (strokeAlpha > 0) || sdata->strokeFill();
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auto clipRegion = bbox;
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//invisible shape turned to visible by alpha.
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auto prepareShape = false;
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if (!shapePrepared(&shape) && ((flags & RenderUpdateFlag::Color) || (opacity > 0))) prepareShape = true;
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//Shape
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if (flags & (RenderUpdateFlag::Path | RenderUpdateFlag::Transform) || prepareShape) {
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uint8_t alpha = 0;
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sdata->fillColor(nullptr, nullptr, nullptr, &alpha);
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alpha = static_cast<uint8_t>(static_cast<uint32_t>(alpha) * opacity / 255);
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bool renderShape = (alpha > 0 || sdata->fill());
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if (renderShape || validStroke) {
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shapeReset(&shape);
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if (!shapePrepare(&shape, sdata, transform, clipRegion, bbox, mpool, tid)) goto err;
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if (renderShape) {
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/* We assume that if stroke width is bigger than 2,
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shape outline below stroke could be full covered by stroke drawing.
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Thus it turns off antialising in that condition.
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Also, it shouldn't be dash style. */
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auto antiAlias = (strokeAlpha == 255 && strokeWidth > 2 && sdata->strokeDash(nullptr) == 0) ? false : true;
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if (!shapeGenRle(&shape, sdata, antiAlias, clips.count > 0 ? true : false)) goto err;
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filling = true;
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}
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}
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}
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//Fill
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if (flags & (RenderUpdateFlag::Gradient | RenderUpdateFlag::Transform | RenderUpdateFlag::Color)) {
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auto fill = sdata->fill();
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if (fill) {
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auto ctable = (flags & RenderUpdateFlag::Gradient) ? true : false;
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if (ctable) shapeResetFill(&shape);
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if (!shapeGenFillColors(&shape, fill, transform, surface, opacity, ctable)) goto err;
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filling = true;
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} else {
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shapeDelFill(&shape);
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}
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}
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//Stroke
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if (flags & (RenderUpdateFlag::Stroke | RenderUpdateFlag::Transform)) {
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if (validStroke) {
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shapeResetStroke(&shape, sdata, transform);
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if (!shapeGenStrokeRle(&shape, sdata, transform, clipRegion, bbox, mpool, tid)) goto err;
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stroking = true;
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if (auto fill = sdata->strokeFill()) {
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auto ctable = (flags & RenderUpdateFlag::GradientStroke) ? true : false;
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if (ctable) shapeResetStrokeFill(&shape);
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if (!shapeGenStrokeFillColors(&shape, fill, transform, surface, opacity, ctable)) goto err;
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} else {
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shapeDelStrokeFill(&shape);
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}
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} else {
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shapeDelStroke(&shape);
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}
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}
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//Clip Path
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for (auto clip = clips.data; clip < (clips.data + clips.count); ++clip) {
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auto clipper = &static_cast<SwShapeTask*>(*clip)->shape;
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//Clip shape rle
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if (shape.rle) {
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if (clipper->rect) rleClipRect(shape.rle, &clipper->bbox);
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else if (clipper->rle) rleClipPath(shape.rle, clipper->rle);
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}
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//Clip stroke rle
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if (shape.strokeRle) {
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if (clipper->rect) rleClipRect(shape.strokeRle, &clipper->bbox);
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else if (clipper->rle) rleClipPath(shape.strokeRle, clipper->rle);
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}
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}
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goto end;
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err:
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shapeReset(&shape);
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end:
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shapeDelOutline(&shape, mpool, tid);
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if (stroking && filling && opacity < 255) cmpStroking = true;
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else cmpStroking = false;
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}
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bool dispose() override
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{
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shapeFree(&shape);
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return true;
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}
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};
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struct SwImageTask : SwTask
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{
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SwImage image;
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const Picture* pdata = nullptr;
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void run(unsigned tid) override
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{
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auto clipRegion = bbox;
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//Invisible shape turned to visible by alpha.
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auto prepareImage = false;
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if (!imagePrepared(&image) && ((flags & RenderUpdateFlag::Image) || (opacity > 0))) prepareImage = true;
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if (prepareImage) {
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imageReset(&image);
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if (!imagePrepare(&image, pdata, transform, clipRegion, bbox, mpool, tid)) goto end;
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//Clip Path?
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if (clips.count > 0) {
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if (!imageGenRle(&image, pdata, bbox, false)) goto end;
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if (image.rle) {
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for (auto clip = clips.data; clip < (clips.data + clips.count); ++clip) {
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auto clipper = &static_cast<SwShapeTask*>(*clip)->shape;
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if (clipper->rect) rleClipRect(image.rle, &clipper->bbox);
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else if (clipper->rle) rleClipPath(image.rle, clipper->rle);
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}
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}
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}
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}
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image.data = const_cast<uint32_t*>(pdata->data());
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end:
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imageDelOutline(&image, mpool, tid);
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}
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bool dispose() override
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{
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imageFree(&image);
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return true;
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}
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};
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static void _termEngine()
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{
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if (rendererCnt > 0) return;
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mpoolTerm(globalMpool);
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globalMpool = nullptr;
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}
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/************************************************************************/
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/* External Class Implementation */
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/************************************************************************/
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SwRenderer::~SwRenderer()
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{
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clear();
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if (surface) delete(surface);
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if (!sharedMpool) mpoolTerm(mpool);
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--rendererCnt;
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if (rendererCnt == 0 && initEngineCnt == 0) _termEngine();
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}
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bool SwRenderer::clear()
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{
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for (auto task = tasks.data; task < (tasks.data + tasks.count); ++task) (*task)->done();
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tasks.clear();
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if (surface) {
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vport.x = vport.y = 0;
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vport.w = surface->w;
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vport.h = surface->h;
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}
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return true;
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}
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bool SwRenderer::sync()
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{
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return true;
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}
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RenderRegion SwRenderer::viewport()
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{
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return vport;
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}
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bool SwRenderer::viewport(const RenderRegion& vp)
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{
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this->vport = vp;
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return true;
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}
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bool SwRenderer::target(uint32_t* buffer, uint32_t stride, uint32_t w, uint32_t h, uint32_t cs)
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{
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if (!buffer || stride == 0 || w == 0 || h == 0 || w > stride) return false;
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if (!surface) {
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surface = new SwSurface;
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if (!surface) return false;
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}
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surface->buffer = buffer;
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surface->stride = stride;
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surface->w = w;
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surface->h = h;
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surface->cs = cs;
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vport.x = vport.y = 0;
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vport.w = surface->w;
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vport.h = surface->h;
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return rasterCompositor(surface);
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}
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bool SwRenderer::preRender()
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{
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return rasterClear(surface);
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}
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bool SwRenderer::postRender()
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{
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tasks.clear();
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//Free Composite Caches
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for (auto comp = compositors.data; comp < (compositors.data + compositors.count); ++comp) {
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free((*comp)->compositor->image.data);
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delete((*comp)->compositor);
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delete(*comp);
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}
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compositors.reset();
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return true;
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}
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bool SwRenderer::renderImage(RenderData data)
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{
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auto task = static_cast<SwImageTask*>(data);
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task->done();
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if (task->opacity == 0) return true;
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return rasterImage(surface, &task->image, task->transform, task->bbox, task->opacity);
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}
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bool SwRenderer::renderShape(RenderData data)
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{
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auto task = static_cast<SwShapeTask*>(data);
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if (!task) return false;
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task->done();
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if (task->opacity == 0) return true;
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uint32_t opacity;
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Compositor* cmp = nullptr;
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//Do Stroking Composition
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if (task->cmpStroking) {
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opacity = 255;
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cmp = target(task->bounds());
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beginComposite(cmp, CompositeMethod::None, task->opacity);
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//No Stroking Composition
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} else {
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opacity = task->opacity;
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}
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//Main raster stage
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uint8_t r, g, b, a;
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if (auto fill = task->sdata->fill()) {
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rasterGradientShape(surface, &task->shape, fill->id());
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} else {
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task->sdata->fillColor(&r, &g, &b, &a);
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a = static_cast<uint8_t>((opacity * (uint32_t) a) / 255);
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if (a > 0) rasterSolidShape(surface, &task->shape, r, g, b, a);
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}
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if (auto strokeFill = task->sdata->strokeFill()) {
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rasterGradientStroke(surface, &task->shape, strokeFill->id());
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} else {
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if (task->sdata->strokeColor(&r, &g, &b, &a) == Result::Success) {
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a = static_cast<uint8_t>((opacity * (uint32_t) a) / 255);
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if (a > 0) rasterStroke(surface, &task->shape, r, g, b, a);
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}
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}
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if (task->cmpStroking) endComposite(cmp);
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return true;
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}
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RenderRegion SwRenderer::region(RenderData data)
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{
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return static_cast<SwTask*>(data)->bounds();
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}
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bool SwRenderer::beginComposite(Compositor* cmp, CompositeMethod method, uint32_t opacity)
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{
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if (!cmp) return false;
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auto p = static_cast<SwCompositor*>(cmp);
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p->method = method;
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p->opacity = opacity;
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//Current Context?
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if (p->method != CompositeMethod::None) {
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surface = p->recoverSfc;
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surface->compositor = p;
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}
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return true;
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}
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bool SwRenderer::mempool(bool shared)
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{
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if (shared == sharedMpool) return true;
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if (shared) {
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if (!sharedMpool) {
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if (!mpoolTerm(mpool)) return false;
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mpool = globalMpool;
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}
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} else {
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if (sharedMpool) mpool = mpoolInit(threadsCnt);
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}
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sharedMpool = shared;
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if (mpool) return true;
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return false;
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}
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Compositor* SwRenderer::target(const RenderRegion& region)
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{
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auto x = region.x;
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auto y = region.y;
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auto w = region.w;
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auto h = region.h;
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//Out of boundary
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if (x > surface->w || y > surface->h) return nullptr;
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SwSurface* cmp = nullptr;
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//Use cached data
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for (auto p = compositors.data; p < (compositors.data + compositors.count); ++p) {
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if ((*p)->compositor->valid) {
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cmp = *p;
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break;
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}
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}
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//New Composition
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if (!cmp) {
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cmp = new SwSurface;
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if (!cmp) goto err;
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//Inherits attributes from main surface
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*cmp = *surface;
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cmp->compositor = new SwCompositor;
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if (!cmp->compositor) goto err;
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//SwImage, Optimize Me: Surface size from MainSurface(WxH) to Parameter W x H
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cmp->compositor->image.data = (uint32_t*) malloc(sizeof(uint32_t) * surface->stride * surface->h);
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if (!cmp->compositor->image.data) goto err;
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compositors.push(cmp);
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}
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//Boundary Check
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if (x + w > surface->w) w = (surface->w - x);
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if (y + h > surface->h) h = (surface->h - y);
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#ifdef THORVG_LOG_ENABLED
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printf("SW_ENGINE: Using intermediate composition [Region: %d %d %d %d]\n", x, y, w, h);
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#endif
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cmp->compositor->recoverSfc = surface;
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cmp->compositor->recoverCmp = surface->compositor;
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cmp->compositor->valid = false;
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cmp->compositor->bbox.min.x = x;
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cmp->compositor->bbox.min.y = y;
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cmp->compositor->bbox.max.x = x + w;
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cmp->compositor->bbox.max.y = y + h;
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cmp->compositor->image.w = surface->stride;
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cmp->compositor->image.h = surface->h;
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//We know partial clear region
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cmp->buffer = cmp->compositor->image.data + (cmp->stride * y + x);
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cmp->w = w;
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cmp->h = h;
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rasterClear(cmp);
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//Recover context
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cmp->buffer = cmp->compositor->image.data;
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cmp->w = cmp->compositor->image.w;
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cmp->h = cmp->compositor->image.h;
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//Switch render target
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surface = cmp;
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return cmp->compositor;
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err:
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if (cmp) {
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if (cmp->compositor) delete(cmp->compositor);
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delete(cmp);
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}
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return nullptr;
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}
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bool SwRenderer::endComposite(Compositor* cmp)
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{
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if (!cmp) return false;
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auto p = static_cast<SwCompositor*>(cmp);
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p->valid = true;
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//Recover Context
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surface = p->recoverSfc;
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surface->compositor = p->recoverCmp;
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//Default is alpha blending
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if (p->method == CompositeMethod::None) {
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return rasterImage(surface, &p->image, nullptr, p->bbox, p->opacity);
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}
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return true;
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}
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bool SwRenderer::dispose(RenderData data)
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{
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auto task = static_cast<SwTask*>(data);
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if (!task) return true;
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task->done();
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task->dispose();
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if (task->transform) free(task->transform);
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delete(task);
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return true;
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}
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void* SwRenderer::prepareCommon(SwTask* task, const RenderTransform* transform, uint32_t opacity, const Array<RenderData>& clips, RenderUpdateFlag flags)
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{
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if (!surface) return task;
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if (flags == RenderUpdateFlag::None) return task;
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//Finish previous task if it has duplicated request.
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task->done();
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if (clips.count > 0) {
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//Guarantee composition targets get ready.
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for (auto clip = clips.data; clip < (clips.data + clips.count); ++clip) {
|
|
static_cast<SwShapeTask*>(*clip)->done();
|
|
}
|
|
task->clips = clips;
|
|
}
|
|
|
|
if (transform) {
|
|
if (!task->transform) task->transform = static_cast<Matrix*>(malloc(sizeof(Matrix)));
|
|
*task->transform = transform->m;
|
|
} else {
|
|
if (task->transform) free(task->transform);
|
|
task->transform = nullptr;
|
|
}
|
|
|
|
task->opacity = opacity;
|
|
task->surface = surface;
|
|
task->mpool = mpool;
|
|
task->flags = flags;
|
|
task->bbox.min.x = max(static_cast<SwCoord>(0), static_cast<SwCoord>(vport.x));
|
|
task->bbox.min.y = max(static_cast<SwCoord>(0), static_cast<SwCoord>(vport.y));
|
|
task->bbox.max.x = min(static_cast<SwCoord>(surface->w), static_cast<SwCoord>(vport.x + vport.w));
|
|
task->bbox.max.y = min(static_cast<SwCoord>(surface->h), static_cast<SwCoord>(vport.y + vport.h));
|
|
|
|
tasks.push(task);
|
|
TaskScheduler::request(task);
|
|
|
|
return task;
|
|
}
|
|
|
|
|
|
RenderData SwRenderer::prepare(const Picture& pdata, RenderData data, const RenderTransform* transform, uint32_t opacity, Array<RenderData>& clips, RenderUpdateFlag flags)
|
|
{
|
|
//prepare task
|
|
auto task = static_cast<SwImageTask*>(data);
|
|
if (!task) {
|
|
task = new SwImageTask;
|
|
if (!task) return nullptr;
|
|
task->pdata = &pdata;
|
|
}
|
|
return prepareCommon(task, transform, opacity, clips, flags);
|
|
}
|
|
|
|
|
|
RenderData SwRenderer::prepare(const Shape& sdata, RenderData data, const RenderTransform* transform, uint32_t opacity, Array<RenderData>& clips, RenderUpdateFlag flags)
|
|
{
|
|
//prepare task
|
|
auto task = static_cast<SwShapeTask*>(data);
|
|
if (!task) {
|
|
task = new SwShapeTask;
|
|
if (!task) return nullptr;
|
|
task->sdata = &sdata;
|
|
}
|
|
return prepareCommon(task, transform, opacity, clips, flags);
|
|
}
|
|
|
|
|
|
SwRenderer::SwRenderer():mpool(globalMpool)
|
|
{
|
|
}
|
|
|
|
|
|
bool SwRenderer::init(uint32_t threads)
|
|
{
|
|
if ((initEngineCnt++) > 0) return true;
|
|
|
|
threadsCnt = threads;
|
|
|
|
//Share the memory pool among the renderer
|
|
globalMpool = mpoolInit(threads);
|
|
if (!globalMpool) {
|
|
--initEngineCnt;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
int32_t SwRenderer::init()
|
|
{
|
|
return initEngineCnt;
|
|
}
|
|
|
|
|
|
bool SwRenderer::term()
|
|
{
|
|
if ((--initEngineCnt) > 0) return true;
|
|
|
|
initEngineCnt = 0;
|
|
|
|
_termEngine();
|
|
|
|
return true;
|
|
}
|
|
|
|
SwRenderer* SwRenderer::gen()
|
|
{
|
|
++rendererCnt;
|
|
return new SwRenderer();
|
|
}
|