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Issue #2364 - use DrawTarget::DrawSurfaceWithShadow to render box shadows on platforms that accelerate it.

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Moonchild 2023-10-30 13:03:32 +01:00 • committed by roytam1
commit 4beb3b947c
13 changed files with 228 additions and 150 deletions
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33
gfx/2d/DrawTargetCairo.cpp
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@ -931,16 +931,18 @@ DrawTargetCairo::DrawSurfaceWithShadow(SourceSurface *aSurface,
if (cairo_surface_get_type(sourcesurf) == CAIRO_SURFACE_TYPE_TEE) {
blursurf = cairo_tee_surface_index(sourcesurf, 0);
surf = cairo_tee_surface_index(sourcesurf, 1);
} else {
blursurf = sourcesurf;
surf = sourcesurf;
}
if (aSigma != 0.0f) {
MOZ_ASSERT(cairo_surface_get_type(blursurf) == CAIRO_SURFACE_TYPE_IMAGE);
Rect extents(0, 0, width, height);
AlphaBoxBlur blur(extents,
cairo_image_surface_get_stride(blursurf),
aSigma, aSigma);
blur.Blur(cairo_image_surface_get_data(blursurf));
} else {
blursurf = sourcesurf;
surf = sourcesurf;
}
WillChange();
@ -951,25 +953,24 @@ DrawTargetCairo::DrawSurfaceWithShadow(SourceSurface *aSurface,
cairo_identity_matrix(mContext);
cairo_translate(mContext, aDest.x, aDest.y);
if (IsOperatorBoundByMask(aOperator)){
cairo_set_source_rgba(mContext, aColor.r, aColor.g, aColor.b, aColor.a);
cairo_mask_surface(mContext, blursurf, aOffset.x, aOffset.y);
bool needsGroup = !IsOperatorBoundByMask(aOperator);
if (needsGroup) {
cairo_push_group(mContext);
}
cairo_set_source_rgba(mContext, aColor.r, aColor.g, aColor.b, aColor.a);
cairo_mask_surface(mContext, blursurf, aOffset.x, aOffset.y);
if (blursurf != surf ||
aSurface->GetFormat() != SurfaceFormat::A8) {
// Now that the shadow has been drawn, we can draw the surface on top.
cairo_set_source_surface(mContext, surf, 0, 0);
cairo_new_path(mContext);
cairo_rectangle(mContext, 0, 0, width, height);
cairo_fill(mContext);
} else {
cairo_push_group(mContext);
cairo_set_source_rgba(mContext, aColor.r, aColor.g, aColor.b, aColor.a);
cairo_mask_surface(mContext, blursurf, aOffset.x, aOffset.y);
}
// Now that the shadow has been drawn, we can draw the surface on top.
cairo_set_source_surface(mContext, surf, 0, 0);
cairo_new_path(mContext);
cairo_rectangle(mContext, 0, 0, width, height);
cairo_fill(mContext);
if (needsGroup) {
cairo_pop_group_to_source(mContext);
cairo_paint(mContext);
}
@ -1924,7 +1925,7 @@ DrawTargetCairo::CreateShadowDrawTarget(const IntSize &aSize, SurfaceFormat aFor
// If we don't have a blur then we can use the RGBA mask and keep all the
// operations in graphics memory.
if (aSigma == 0.0F) {
if (aSigma == 0.0f || aFormat == SurfaceFormat::A8) {
RefPtr<DrawTargetCairo> target = new DrawTargetCairo();
if (target->InitAlreadyReferenced(similar, aSize)) {
return target.forget();