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renderer: caching the viewport update

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reuse cached scene viewport data if scene had no update before,
just a minor optimization
This commit is contained in:
Hermet Park 2025-06-12 16:06:51 +09:00 • committed by Hermet Park
parent 3eaf110e0a
commit 8f10f45756
1 changed files with 13 additions and 4 deletions
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17
src/renderer/tvgScene.h
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@ -68,6 +68,7 @@ struct SceneImpl : Scene
Array<RenderEffect*>* effects = nullptr;
uint8_t compFlag = CompositionFlag::Invalid;
uint8_t opacity; //for composition
bool vdirty = false;
SceneImpl() : impl(Paint::Impl(this))
{
@ -105,7 +106,7 @@ struct SceneImpl : Scene
RenderData update(RenderMethod* renderer, const Matrix& transform, Array<RenderData>& clips, uint8_t opacity, RenderUpdateFlag flag, TVG_UNUSED bool clipper)
{
this->vport = renderer->viewport();
if (paints.empty()) return nullptr;
if (needComposition(opacity)) {
/* Overriding opacity value. If this scene is half-translucent,
@ -123,11 +124,17 @@ struct SceneImpl : Scene
}
}
//this viewport update is more performant than in bounds()?
vport = renderer->viewport();
vdirty = true;
return nullptr;
}
bool render(RenderMethod* renderer)
{
if (paints.empty()) return true;
RenderCompositor* cmp = nullptr;
auto ret = true;
@ -157,9 +164,11 @@ struct SceneImpl : Scene
return ret;
}
RenderRegion bounds(RenderMethod* renderer) const
RenderRegion bounds(RenderMethod* renderer)
{
if (paints.empty()) return {};
if (!vdirty) return vport;
vdirty = false;
//Merge regions
RenderRegion pRegion = {{INT32_MAX, INT32_MAX}, {0, 0}};
@ -185,8 +194,8 @@ struct SceneImpl : Scene
pRegion.max.x += eRegion.max.x;
pRegion.max.y += eRegion.max.y;
pRegion.intersect(this->vport);
return pRegion;
vport = RenderRegion::intersect(vport, pRegion);
return vport;
}
Result bounds(Point* pt4, Matrix& m, bool obb, bool stroking)