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sw_engine renderer: add clip() interface.

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As there are multiple types of painting tasks,
the clip() interface has been newly designed to handle clipping behavior
according to each task's role when requested."

Now Scene clipper could implement clipping behavior on it.
This commit is contained in:
Hermet Park 2023-04-10 22:19:13 +09:00
parent a0fbe7db41
commit a45275b779
1 changed files with 23 additions and 19 deletions
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42
src/lib/sw_engine/tvgSwRenderer.cpp
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@ -61,6 +61,7 @@ struct SwTask : Task
}
virtual bool dispose() = 0;
virtual bool clip(SwRleData* target) = 0;
virtual ~SwTask()
{
@ -76,6 +77,15 @@ struct SwShapeTask : SwTask
bool cmpStroking = false;
bool clipper = false;
bool clip(SwRleData* target) override
{
if (shape.fastTrack) rleClipRect(target, &bbox);
else if (shape.rle) rleClipPath(target, shape.rle);
else return false;
return true;
}
void run(unsigned tid) override
{
if (opacity == 0 && !clipper) return; //Invisible
@ -150,22 +160,13 @@ struct SwShapeTask : SwTask
//Clip Path
for (auto clip = clips.data; clip < (clips.data + clips.count); ++clip) {
auto clipper = static_cast<SwTask*>(*clip);
//Guarantee composition targets get ready.
static_cast<SwShapeTask*>(*clip)->done(tid);
auto clipper = &static_cast<SwShapeTask*>(*clip)->shape;
clipper->done(tid);
//Clip shape rle
if (shape.rle) {
if (clipper->fastTrack) rleClipRect(shape.rle, &clipper->bbox);
else if (clipper->rle) rleClipPath(shape.rle, clipper->rle);
else goto err;
}
if (shape.rle && !clipper->clip(shape.rle)) goto err;
//Clip stroke rle
if (shape.strokeRle) {
if (clipper->fastTrack) rleClipRect(shape.strokeRle, &clipper->bbox);
else if (clipper->rle) rleClipPath(shape.strokeRle, clipper->rle);
else goto err;
}
if (shape.strokeRle && !clipper->clip(shape.strokeRle)) goto err;
}
goto end;
@ -189,6 +190,12 @@ struct SwImageTask : SwTask
Polygon* triangles;
uint32_t triangleCnt;
bool clip(SwRleData* target) override
{
TVGERR("SW_ENGINE", "Image is used as ClipPath?");
return true;
}
void run(unsigned tid) override
{
auto clipRegion = bbox;
@ -205,13 +212,10 @@ struct SwImageTask : SwTask
if (!imageGenRle(&image, bbox, false)) goto end;
if (image.rle) {
for (auto clip = clips.data; clip < (clips.data + clips.count); ++clip) {
auto clipper = static_cast<SwTask*>(*clip);
//Guarantee composition targets get ready.
static_cast<SwShapeTask*>(*clip)->done(tid);
auto clipper = &static_cast<SwShapeTask*>(*clip)->shape;
if (clipper->fastTrack) rleClipRect(image.rle, &clipper->bbox);
else if (clipper->rle) rleClipPath(image.rle, clipper->rle);
else goto err;
clipper->done(tid);
if (!clipper->clip(image.rle)) goto err;
}
}
}