Support complex-rounded image spoilers.

ui/effects/spoiler_mess.cpp

@@ -501,48 +501,52 @@ void FillSpoilerRect(
 void FillSpoilerRect(
 		QPainter &p,
 		QRect rect,
-		ImageRoundRadius radius,
-		RectParts corners,
+		Images::CornersMaskRef mask,
 		const SpoilerMessFrame &frame,
 		QImage &cornerCache,
 		QPoint originShift) {
-	if (radius == ImageRoundRadius::None || !corners) {
-		FillSpoilerRect(p, rect, frame, originShift);
-		return;
-	}
-	const auto &mask = Images::CornersMask(radius);
-	const auto side = mask[0].width() / style::DevicePixelRatio();
-	const auto xFillFrom = (corners & RectPart::FullLeft) ? side : 0;
-	const auto xFillTo = rect.width()
-		- ((corners & RectPart::FullRight) ? side : 0);
-	const auto yFillFrom = (corners & RectPart::FullTop) ? side : 0;
-	const auto yFillTo = rect.height()
-		- ((corners & RectPart::FullBottom) ? side : 0);
-	const auto xFill = xFillTo - xFillFrom;
-	const auto yFill = yFillTo - yFillFrom;
-	if (xFill < 0 || yFill < 0) {
-		// Unexpected.. but maybe not fatal, just glitchy.
+	constexpr auto kTopLeft = 0;
+	constexpr auto kTopRight = 1;
+	constexpr auto kBottomLeft = 2;
+	constexpr auto kBottomRight = 3;
+
+	if ((!mask.p[kTopLeft] || mask.p[kTopLeft]->isNull())
+		&& (!mask.p[kTopRight] || mask.p[kTopRight]->isNull())
+		&& (!mask.p[kBottomLeft] || mask.p[kBottomLeft]->isNull())
+		&& (!mask.p[kBottomRight] || mask.p[kBottomRight]->isNull())) {
 		FillSpoilerRect(p, rect, frame, originShift);
 		return;
 	}
 	const auto ratio = style::DevicePixelRatio();
-	const auto paintPart = [&](int x, int y, int w, int h) {
+	const auto cornerSize = [&](int index) {
+		const auto corner = mask.p[index];
+		return (!corner || corner->isNull()) ? 0 : (corner->width() / ratio);
+	};
+	const auto verticalSkip = [&](int left, int right) {
+		return std::max(cornerSize(left), cornerSize(right));
+	};
+	const auto fillBg = [&](QRect part) {
 		FillSpoilerRect(
 			p,
-			{ rect.x() + x, rect.y() + y, w, h },
+			part.translated(rect.topLeft()),
 			frame,
-			originShift - QPoint(x, y));
+			originShift - part.topLeft());
 	};
-	const auto paintCorner = [&](QPoint position, const QImage &mask) {
-		if (cornerCache.width() < mask.width()
-			|| cornerCache.height() < mask.height()) {
+	const auto fillCorner = [&](int x, int y, int index) {
+		const auto position = QPoint(x, y);
+		const auto corner = mask.p[index];
+		if (!corner || corner->isNull()) {
+			return;
+		}
+		if (cornerCache.width() < corner->width()
+			|| cornerCache.height() < corner->height()) {
 			cornerCache = QImage(
-				std::max(cornerCache.width(), mask.width()),
-				std::max(cornerCache.height(), mask.height()),
+				std::max(cornerCache.width(), corner->width()),
+				std::max(cornerCache.height(), corner->height()),
 				QImage::Format_ARGB32_Premultiplied);
 			cornerCache.setDevicePixelRatio(ratio);
 		}
-		const auto size = mask.size() / ratio;
+		const auto size = corner->size() / ratio;
 		const auto target = QRect(QPoint(), size);
 		auto q = QPainter(&cornerCache);
 		q.setCompositionMode(QPainter::CompositionMode_Source);
@@ -552,36 +556,83 @@ void FillSpoilerRect(
 			frame,
 			originShift - rect.topLeft() - position);
 		q.setCompositionMode(QPainter::CompositionMode_DestinationIn);
-		q.drawImage(target, mask);
+		q.drawImage(target, *corner);
 		q.end();
 		p.drawImage(
 			QRect(rect.topLeft() + position, size),
 			cornerCache,
-			QRect(QPoint(), mask.size()));
+			QRect(QPoint(), corner->size()));
 	};
-	if (yFillFrom > 0) {
-		if (xFillFrom > 0) {
-			paintCorner({}, mask[0]);
+	const auto top = verticalSkip(kTopLeft, kTopRight);
+	const auto bottom = verticalSkip(kBottomLeft, kBottomRight);
+		if (top) {
+		const auto left = cornerSize(kTopLeft);
+		const auto right = cornerSize(kTopRight);
+		if (left) {
+			fillCorner(rect.left(), rect.top(), kTopLeft);
+			if (const auto add = top - left) {
+				fillBg({ rect.left(), rect.top() + left, left, add });
+			}
 		}
-		if (xFill) {
-			paintPart(xFillFrom, 0, xFill, yFillFrom);
+		if (const auto fill = rect.width() - left - right; fill > 0) {
+			fillBg({ rect.left() + left, rect.top(), fill, top });
 		}
-		if (xFillTo < rect.width()) {
-			paintCorner({ xFillTo, 0 }, mask[1]);
+		if (right) {
+			fillCorner(
+				rect.left() + rect.width() - right,
+				rect.top(),
+				kTopRight);
+			if (const auto add = top - right) {
+				fillBg({
+					rect.left() + rect.width() - right,
+					rect.top() + right,
+					right,
+					add,
+				});
+			}
 		}
 	}
-	if (yFill) {
-		paintPart(0, yFillFrom, rect.width(), yFill);
+	if (const auto h = rect.height() - top - bottom; h > 0) {
+		fillBg({ rect.left(), rect.top() + top, rect.width(), h });
 	}
-	if (yFillTo < rect.height()) {
-		if (xFillFrom > 0) {
-			paintCorner({ 0, yFillTo }, mask[2]);
+	if (bottom) {
+		const auto left = cornerSize(kBottomLeft);
+		const auto right = cornerSize(kBottomRight);
+		if (left) {
+			fillCorner(
+				rect.left(),
+				rect.top() + rect.height() - left,
+				kBottomLeft);
+			if (const auto add = bottom - left) {
+				fillBg({
+					rect.left(),
+					rect.top() + rect.height() - bottom,
+					left,
+					add,
+				});
+			}
 		}
-		if (xFill) {
-			paintPart(xFillFrom, yFillTo, xFill, rect.height() - yFillTo);
+		if (const auto fill = rect.width() - left - right; fill > 0) {
+			fillBg({
+				rect.left() + left,
+				rect.top() + rect.height() - bottom,
+				fill,
+				bottom,
+			});
 		}
-		if (xFillTo < rect.width()) {
-			paintCorner({ xFillTo, yFillTo }, mask[3]);
+		if (right) {
+			fillCorner(
+				rect.left() + rect.width() - right,
+				rect.top() + rect.height() - right,
+				kBottomRight);
+			if (const auto add = bottom - right) {
+				fillBg({
+					rect.left() + rect.width() - right,
+					rect.top() + rect.height() - bottom,
+					right,
+					add,
+				});
+			}
 		}
 	}
 }

ui/effects/spoiler_mess.h

@@ -8,15 +8,9 @@
 
 #include <crl/crl_time.h>
 
-enum class ImageRoundRadius;
-
-namespace base {
-template <typename EnumType>
-class flags;
-} // namespace base
-
-enum class RectPart;
-using RectParts = base::flags<RectPart>;
+namespace Images {
+struct CornersMaskRef;
+} // namespace Images
 
 namespace Ui {
 
@@ -49,8 +43,7 @@ void FillSpoilerRect(
 void FillSpoilerRect(
 	QPainter &p,
 	QRect rect,
-	ImageRoundRadius radius,
-	RectParts corners,
+	Images::CornersMaskRef mask,
 	const SpoilerMessFrame &frame,
 	QImage &cornerCache,
 	QPoint originShift = {});

ui/image/image_prepare.cpp

@@ -1009,8 +1009,7 @@ QImage Circle(QImage &&image, QRect target) {
 
 QImage Round(
 		QImage &&image,
-		gsl::span<const QImage, 4> cornerMasks,
-		RectParts corners,
+		CornersMaskRef mask,
 		QRect target) {
 	if (target.isNull()) {
 		target = QRect(QPoint(), image.size());
@@ -1035,23 +1034,24 @@ QImage Round(
 	Assert(image.depth() == ((kImageIntsPerPixel * sizeof(uint32)) << 3));
 	Assert(image.bytesPerLine() == (imageIntsPerLine << 2));
 	const auto maskCorner = [&](
-			const QImage &mask,
+			const QImage *mask,
 			bool right = false,
 			bool bottom = false) {
-		const auto maskWidth = mask.width();
-		const auto maskHeight = mask.height();
-		if (mask.isNull()
+		const auto maskWidth = mask ? mask->width() : 0;
+		const auto maskHeight = mask ? mask->height() : 0;
+		if (!maskWidth
+			|| !maskHeight
 			|| targetWidth < maskWidth
 			|| targetHeight < maskHeight) {
 			return;
 		}
 
-		const auto maskBytesPerPixel = (mask.depth() >> 3);
-		const auto maskBytesPerLine = mask.bytesPerLine();
+		const auto maskBytesPerPixel = (mask->depth() >> 3);
+		const auto maskBytesPerLine = mask->bytesPerLine();
 		const auto maskBytesAdded = maskBytesPerLine
 			- maskWidth * maskBytesPerPixel;
 		Assert(maskBytesAdded >= 0);
-		Assert(mask.depth() == (maskBytesPerPixel << 3));
+		Assert(mask->depth() == (maskBytesPerPixel << 3));
 		const auto imageIntsAdded = imageIntsPerLine
 			- maskWidth * kImageIntsPerPixel;
 		Assert(imageIntsAdded >= 0);
@@ -1062,7 +1062,7 @@ QImage Round(
 		if (bottom) {
 			imageInts += (targetHeight - maskHeight) * imageIntsPerLine;
 		}
-		auto maskBytes = mask.constBits();
+		auto maskBytes = mask->constBits();
 		for (auto y = 0; y != maskHeight; ++y) {
 			for (auto x = 0; x != maskWidth; ++x) {
 				auto opacity = static_cast<anim::ShiftedMultiplier>(*maskBytes) + 1;
@@ -1075,18 +1075,27 @@ QImage Round(
 		}
 	};
 
-	if (corners & RectPart::TopLeft) maskCorner(cornerMasks[0]);
-	if (corners & RectPart::TopRight) maskCorner(cornerMasks[1], true);
-	if (corners & RectPart::BottomLeft) {
-		maskCorner(cornerMasks[2], false, true);
-	}
-	if (corners & RectPart::BottomRight) {
-		maskCorner(cornerMasks[3], true, true);
-	}
+	maskCorner(mask.p[0]);
+	maskCorner(mask.p[1], true);
+	maskCorner(mask.p[2], false, true);
+	maskCorner(mask.p[3], true, true);
 
 	return std::move(image);
 }
 
+QImage Round(
+		QImage &&image,
+		gsl::span<const QImage, 4> cornerMasks,
+		RectParts corners,
+		QRect target) {
+	return Round(std::move(image), CornersMaskRef({
+		(corners & RectPart::TopLeft) ? &cornerMasks[0] : nullptr,
+		(corners & RectPart::TopRight) ? &cornerMasks[1] : nullptr,
+		(corners & RectPart::BottomLeft) ? &cornerMasks[2] : nullptr,
+		(corners & RectPart::BottomRight) ? &cornerMasks[3] : nullptr,
+	}), target);
+}
+
 QImage Round(
 		QImage &&image,
 		ImageRoundRadius radius,

ui/image/image_prepare.h

@@ -46,6 +46,24 @@ namespace Images {
 	int bottomAlpha,
 	QColor color = QColor(0, 0, 0));
 
+struct CornersMaskRef {
+	CornersMaskRef() = default;
+	explicit CornersMaskRef(gsl::span<const QImage, 4> masks)
+	: p{ &masks[0], &masks[1], &masks[2], &masks[3] } {
+	}
+	explicit CornersMaskRef(std::array<const QImage, 4> masks)
+	: p{ &masks[0], &masks[1], &masks[2], &masks[3] } {
+	}
+	explicit CornersMaskRef(gsl::span<const QImage*, 4> masks)
+	: p{ masks[0], masks[1], masks[2], masks[3] } {
+	}
+	explicit CornersMaskRef(std::array<const QImage*, 4> masks)
+	: p{ masks[0], masks[1], masks[2], masks[3] } {
+	}
+
+	std::array<const QImage*, 4> p{};
+};
+
 [[nodiscard]] const std::array<QImage, 4> &CornersMask(
 	ImageRoundRadius radius);
 [[nodiscard]] std::array<QImage, 4> PrepareCorners(
@@ -100,6 +118,11 @@ inline constexpr auto is_flag_type(Option) { return true; };
 	ImageRoundRadius radius,
 	RectParts corners = RectPart::AllCorners);
 
+[[nodiscard]] QImage Round(
+	QImage &&image,
+	CornersMaskRef mask,
+	QRect target = QRect());
+
 [[nodiscard]] QImage Blur(QImage &&image, bool ignoreAlpha = false);
 [[nodiscard]] QImage Round(
 	QImage &&image,