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sw_engine: dropshadow stability++
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Browse source 
removed the direct rendering optimization of the dropshadow,
because it's a buggy.
This commit is contained in:
Hermet Park 2025-07-08 00:32:11 +09:00 • committed by Hermet Park
parent 4e645918c7
commit 78753eed31
3 changed files with 6 additions and 15 deletions
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2
src/renderer/sw_engine/tvgSwCommon.h
View file

@ -672,7 +672,7 @@ uint32_t rasterUnpremultiply(uint32_t data);
bool effectGaussianBlur(SwCompositor* cmp, SwSurface* surface, const RenderEffectGaussianBlur* params);
bool effectGaussianBlurRegion(RenderEffectGaussianBlur* effect);
void effectGaussianBlurUpdate(RenderEffectGaussianBlur* effect, const Matrix& transform);
bool effectDropShadow(SwCompositor* cmp, SwSurface* surfaces[2], const RenderEffectDropShadow* params, bool direct);
bool effectDropShadow(SwCompositor* cmp, SwSurface* surfaces[2], const RenderEffectDropShadow* params);
bool effectDropShadowRegion(RenderEffectDropShadow* effect);
void effectDropShadowUpdate(RenderEffectDropShadow* effect, const Matrix& transform);
void effectFillUpdate(RenderEffectFill* effect);

17
src/renderer/sw_engine/tvgSwPostEffect.cpp
View file

@ -267,14 +267,14 @@ static void _dropShadowFilter(uint32_t* dst, uint32_t* src, int stride, int w, i
}
static void _dropShadowShift(uint32_t* dst, uint32_t* src, int dstride, int sstride, RenderRegion& bbox, SwPoint& offset, uint8_t opacity, bool direct)
static void _dropShadowShift(uint32_t* dst, uint32_t* src, int dstride, int sstride, RenderRegion& bbox, SwPoint& offset, uint8_t opacity)
{
src += (bbox.min.y * sstride + bbox.min.x);
dst += (bbox.min.y * dstride + bbox.min.x);
auto w = bbox.max.x - bbox.min.x;
auto h = bbox.max.y - bbox.min.y;
auto translucent = (direct || opacity < 255);
auto translucent = (opacity < 255);
//shift offset
if (bbox.min.x + offset.x < 0) src -= offset.x;
@ -342,7 +342,7 @@ void effectDropShadowUpdate(RenderEffectDropShadow* params, const Matrix& transf
//A quite same integration with effectGaussianBlur(). See it for detailed comments.
//surface[0]: the original image, to overlay it into the filtered image.
//surface[1]: temporary buffer for generating the filtered image.
bool effectDropShadow(SwCompositor* cmp, SwSurface* surface[2], const RenderEffectDropShadow* params, bool direct)
bool effectDropShadow(SwCompositor* cmp, SwSurface* surface[2], const RenderEffectDropShadow* params)
{
//FIXME: if the body is partially visible due to clipping, the shadow also becomes partially visible.
@ -360,8 +360,6 @@ bool effectDropShadow(SwCompositor* cmp, SwSurface* surface[2], const RenderEffe
auto front = cmp->image.buf32;
auto back = buffer[1]->buf32;
auto opacity = direct ? MULTIPLY(params->color[3], cmp->opacity) : params->color[3];
TVGLOG("SW_ENGINE", "DropShadow region(%d, %d, %d, %d) params(%f %f %f), level(%d)", bbox.min.x, bbox.min.y, bbox.max.x, bbox.max.y, params->angle, params->distance, params->sigma, data->level);
//saving the original image in order to overlay it into the filtered image.
@ -387,16 +385,9 @@ bool effectDropShadow(SwCompositor* cmp, SwSurface* surface[2], const RenderEffe
rasterXYFlip(front, back, stride, h, w, bbox, true);
std::swap(cmp->image.buf32, back);
//draw to the main surface directly
if (direct) {
_dropShadowShift(cmp->recoverSfc->buf32, cmp->image.buf32, cmp->recoverSfc->stride, stride, bbox, data->offset, opacity, direct);
std::swap(cmp->image.buf32, buffer[0]->buf32);
return true;
}
//draw to the intermediate surface
rasterClear(surface[1], bbox.min.x, bbox.min.y, w, h);
_dropShadowShift(buffer[1]->buf32, cmp->image.buf32, stride, stride, bbox, data->offset, opacity, direct);
_dropShadowShift(buffer[1]->buf32, cmp->image.buf32, stride, stride, bbox, data->offset, params->color[3]);
std::swap(cmp->image.buf32, buffer[1]->buf32);
//compositing shadow and body

2
src/renderer/sw_engine/tvgSwRenderer.cpp
View file

@ -731,7 +731,7 @@ bool SwRenderer::render(RenderCompositor* cmp, const RenderEffect* effect, bool
cmp1->compositor->valid = false;
auto cmp2 = request(surface->channelSize, true);
SwSurface* surfaces[] = {cmp1, cmp2};
auto ret = effectDropShadow(p, surfaces, static_cast<const RenderEffectDropShadow*>(effect), direct);
auto ret = effectDropShadow(p, surfaces, static_cast<const RenderEffectDropShadow*>(effect));
cmp1->compositor->valid = true;
return ret;
}