// Blurs a small surface and creates the mask.
static already_AddRefed<SourceSurface>
CreateBlurMask(const IntSize& aRectSize,
RectCornerRadii* aCornerRadii,
gfxIntSize aBlurRadius,
IntMargin& aExtendDestBy,
IntMargin& aSliceBorder,
DrawTarget& aDestDrawTarget)
{
IntMargin slice;
gfxAlphaBoxBlur blur;
IntSize minSize =
ComputeMinSizeForShadowShape(aCornerRadii, aBlurRadius, slice, aRectSize);
IntRect minRect(IntPoint(), minSize);
gfxContext* blurCtx = blur.Init(ThebesRect(Rect(minRect)), gfxIntSize(),
aBlurRadius, nullptr, nullptr);
if (!blurCtx) {
return nullptr;
}
DrawTarget* blurDT = blurCtx->GetDrawTarget();
ColorPattern black(Color(0.f, 0.f, 0.f, 1.f));
if (aCornerRadii) {
RefPtr<Path> roundedRect =
MakePathForRoundedRect(*blurDT, Rect(minRect), *aCornerRadii);
blurDT->Fill(roundedRect, black);
} else {
blurDT->FillRect(Rect(minRect), black);
}
IntPoint topLeft;
RefPtr<SourceSurface> result = blur.DoBlur(&aDestDrawTarget, &topLeft);
if (!result) {
return nullptr;
}
IntRect expandedMinRect(topLeft, result->GetSize());
aExtendDestBy = expandedMinRect - minRect;
aSliceBorder = slice + aExtendDestBy;
MOZ_ASSERT(aSliceBorder.LeftRight() <= expandedMinRect.width);
MOZ_ASSERT(aSliceBorder.TopBottom() <= expandedMinRect.height);
return result.forget();
}
static void
PaintCheckMark(nsIFrame* aFrame,
nsRenderingContext* aCtx,
const nsRect& aDirtyRect,
nsPoint aPt)
{
nsRect rect(aPt, aFrame->GetSize());
rect.Deflate(aFrame->GetUsedBorderAndPadding());
// Points come from the coordinates on a 7X7 unit box centered at 0,0
const int32_t checkPolygonX[] = { -3, -1, 3, 3, -1, -3 };
const int32_t checkPolygonY[] = { -1, 1, -3, -1, 3, 1 };
const int32_t checkNumPoints = sizeof(checkPolygonX) / sizeof(int32_t);
const int32_t checkSize = 9; // 2 units of padding on either side
// of the 7x7 unit checkmark
// Scale the checkmark based on the smallest dimension
nscoord paintScale = std::min(rect.width, rect.height) / checkSize;
nsPoint paintCenter(rect.x + rect.width / 2,
rect.y + rect.height / 2);
DrawTarget* drawTarget = aCtx->GetDrawTarget();
RefPtr<PathBuilder> builder = drawTarget->CreatePathBuilder();
nsPoint p = paintCenter + nsPoint(checkPolygonX[0] * paintScale,
checkPolygonY[0] * paintScale);
int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
builder->MoveTo(NSPointToPoint(p, appUnitsPerDevPixel));
for (int32_t polyIndex = 1; polyIndex < checkNumPoints; polyIndex++) {
p = paintCenter + nsPoint(checkPolygonX[polyIndex] * paintScale,
checkPolygonY[polyIndex] * paintScale);
builder->LineTo(NSPointToPoint(p, appUnitsPerDevPixel));
}
RefPtr<Path> path = builder->Finish();
drawTarget->Fill(path,
ColorPattern(ToDeviceColor(aFrame->StyleColor()->mColor)));
}