already_AddRefed<Path>
nsSVGPathGeometryElement::GetOrBuildPath(const DrawTarget& aDrawTarget,
FillRule aFillRule)
{
// We only cache the path if it matches the backend used for screen painting:
bool cacheable = aDrawTarget.GetBackendType() ==
gfxPlatform::GetPlatform()->GetDefaultContentBackend();
// Checking for and returning mCachedPath before checking the pref means
// that the pref is only live on page reload (or app restart for SVG in
// chrome). The benefit is that we avoid causing a CPU memory cache miss by
// looking at the global variable that the pref's stored in.
if (cacheable && mCachedPath) {
if (aDrawTarget.GetBackendType() == mCachedPath->GetBackendType()) {
RefPtr<Path> path(mCachedPath);
return path.forget();
}
}
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder(aFillRule);
RefPtr<Path> path = BuildPath(builder);
if (cacheable && NS_SVGPathCachingEnabled()) {
mCachedPath = path;
}
return path.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)));
}