BPicture: add gradient support

Fixes #9680.

Change-Id: I0013326559cc40ff26cf7b44794c0b32aea832ba
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2829
Reviewed-by: Stephan Aßmus <[email protected]>

headers/private/interface/PictureDataWriter.h

@@ -20,6 +20,7 @@
 
 
 class Layer;
+class BGradient;
 class BPositionIO;
 class BRegion;
 
@@ -91,6 +92,24 @@ public:
 			status_t			WriteDrawShape(const int32& opCount,
 									const void* opList, const int32& ptCount,
 									const void* ptList, const bool& fill);
+			status_t			WriteDrawRectGradient(const BRect& rect, const BGradient& gradient,
+									const bool& fill);
+			status_t			WriteDrawRoundRectGradient(const BRect& rect,
+									const BPoint& radius, const BGradient& gradient, const bool& fill);
+			status_t			WriteDrawBezierGradient(const BPoint points[4], const BGradient& gradient,
+									const bool& fill);
+			status_t			WriteDrawArcGradient(const BPoint& center,
+									const BPoint& radius,
+									const float& startTheta,
+									const float& arcTheta, const BGradient& gradient, const bool& fill);
+			status_t			WriteDrawEllipseGradient(const BRect& rect, const BGradient& gradient,
+									const bool& fill);
+			status_t			WriteDrawPolygonGradient(const int32& numPoints,
+									BPoint* points, const bool& isClosed, const BGradient& gradient,
+									const bool& fill);
+			status_t			WriteDrawShapeGradient(const int32& opCount,
+									const void* opList, const int32& ptCount,
+									const void* ptList, const BGradient& gradient, const bool& fill);
 			status_t			WriteDrawBitmap(const BRect& srcRect,
 									const BRect& dstRect, const int32& width,
 									const int32& height,

headers/private/interface/PicturePlayer.h

@@ -21,6 +21,7 @@
 
 
 class BAffineTransform;
+class BGradient;
 class BList;
 class BPicture;
 class BShape;
@@ -94,6 +95,13 @@ struct picture_player_callbacks {
 		int32 ptCount, const BPoint ptList[], bool inverse);
 	void (*draw_string_locations)(void* userData, const char* string,
 		size_t length, const BPoint locations[], size_t locationCount);
+	void (*draw_rect_gradient)(void* userData, const BRect& rect, BGradient& gradient, bool fill);
+	void (*draw_round_rect_gradient)(void* userData, const BRect& rect, const BPoint& radii, BGradient& gradient, bool fill);
+	void (*draw_bezier_gradient)(void* userData, size_t numControlPoints, const BPoint controlPoints[], BGradient& gradient, bool fill);
+	void (*draw_arc_gradient)(void* userData, const BPoint& center, const BPoint& radii, float startTheta, float arcTheta, BGradient& gradient, bool fill);
+	void (*draw_ellipse_gradient)(void* userData, const BRect& rect, BGradient& gradient, bool fill);
+	void (*draw_polygon_gradient)(void* userData, size_t numPoints, const BPoint points[], bool isClosed, BGradient& gradient, bool fill);
+	void (*draw_shape_gradient)(void* userData, const BShape& shape, BGradient& gradient, bool fill);
 };
 
 

headers/private/interface/PictureProtocol.h

@@ -23,6 +23,20 @@ enum {
 	B_PIC_STROKE_ELLIPSE		= 0x0115,
 	B_PIC_FILL_ELLIPSE			= 0x0116,
 	B_PIC_DRAW_STRING_LOCATIONS	= 0x0117,
+	B_PIC_STROKE_RECT_GRADIENT	= 0x0118,
+	B_PIC_FILL_RECT_GRADIENT	= 0x0119,
+	B_PIC_STROKE_ROUND_RECT_GRADIENT = 0x011A,
+	B_PIC_FILL_ROUND_RECT_GRADIENT = 0x011B,
+	B_PIC_STROKE_BEZIER_GRADIENT = 0x011C,
+	B_PIC_FILL_BEZIER_GRADIENT	= 0x011D,
+	B_PIC_STROKE_POLYGON_GRADIENT = 0x011E,
+	B_PIC_FILL_POLYGON_GRADIENT	= 0x011F,
+	B_PIC_STROKE_SHAPE_GRADIENT	= 0x0120,
+	B_PIC_FILL_SHAPE_GRADIENT	= 0x0121,
+	B_PIC_STROKE_ARC_GRADIENT	= 0x0122,
+	B_PIC_FILL_ARC_GRADIENT		= 0x0123,
+	B_PIC_STROKE_ELLIPSE_GRADIENT = 0x0124,
+	B_PIC_FILL_ELLIPSE_GRADIENT	= 0x0125,
 
 	B_PIC_ENTER_STATE_CHANGE	= 0x0200,
 	B_PIC_SET_CLIPPING_RECTS	= 0x0201,
@@ -62,7 +76,7 @@ enum {
 };
 
 
-const static uint32 kOpsTableSize = 51;
+const static uint32 kOpsTableSize = 70;
 
 
 #endif

src/kits/interface/PictureDataWriter.cpp

@@ -14,6 +14,7 @@
 #include <string.h>
 
 #include <DataIO.h>
+#include <Gradient.h>
 #include <Point.h>
 #include <Rect.h>
 #include <Region.h>
@@ -519,6 +520,137 @@ PictureDataWriter::WriteDrawShape(const int32& opCount, const void* opList,
 }
 
 
+status_t
+PictureDataWriter::WriteDrawRectGradient(const BRect& rect, const BGradient& gradient, const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_RECT_GRADIENT : B_PIC_STROKE_RECT_GRADIENT);
+		Write<BRect>(rect);
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+status_t
+PictureDataWriter::WriteDrawRoundRectGradient(const BRect& rect, const BPoint& radius, const BGradient& gradient,
+	const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_ROUND_RECT_GRADIENT : B_PIC_STROKE_ROUND_RECT_GRADIENT);
+		Write<BRect>(rect);
+		Write<BPoint>(radius);
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+status_t
+PictureDataWriter::WriteDrawBezierGradient(const BPoint points[4], const BGradient& gradient, const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_BEZIER_GRADIENT : B_PIC_STROKE_BEZIER_GRADIENT);
+		for (int32 i = 0; i < 4; i++)
+			Write<BPoint>(points[i]);
+
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+status_t
+PictureDataWriter::WriteDrawArcGradient(const BPoint& center, const BPoint& radius,
+	const float& startTheta, const float& arcTheta, const BGradient& gradient, const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_ARC_GRADIENT : B_PIC_STROKE_ARC_GRADIENT);
+		Write<BPoint>(center);
+		Write<BPoint>(radius);
+		Write<float>(startTheta);
+		Write<float>(arcTheta);
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+status_t
+PictureDataWriter::WriteDrawEllipseGradient(const BRect& rect, const BGradient& gradient, const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_ELLIPSE_GRADIENT : B_PIC_STROKE_ELLIPSE_GRADIENT);
+		Write<BRect>(rect);
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+status_t
+PictureDataWriter::WriteDrawPolygonGradient(const int32& numPoints, BPoint* points,
+	const bool& isClosed, const BGradient& gradient, const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_POLYGON_GRADIENT : B_PIC_STROKE_POLYGON_GRADIENT);
+		Write<int32>(numPoints);
+		for (int32 i = 0; i < numPoints; i++)
+			Write<BPoint>(points[i]);
+
+		if (!fill)
+			Write<uint8>((uint8)isClosed);
+
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+status_t
+PictureDataWriter::WriteDrawShapeGradient(const int32& opCount, const void* opList,
+	const int32& ptCount, const void* ptList, const BGradient& gradient, const bool& fill)
+{
+	try {
+		BeginOp(fill ? B_PIC_FILL_SHAPE_GRADIENT : B_PIC_STROKE_SHAPE_GRADIENT);
+		Write<int32>(opCount);
+		Write<int32>(ptCount);
+		WriteData(opList, opCount * sizeof(uint32));
+		WriteData(ptList, ptCount * sizeof(BPoint));
+		gradient.Flatten(fData);
+		EndOp();
+	} catch (status_t& status) {
+		return status;
+	}
+
+	return B_OK;
+}
+
+
 status_t
 PictureDataWriter::WriteDrawBitmap(const BRect& srcRect, const BRect& dstRect,
 	const int32& width, const int32& height, const int32& bytesPerRow,

src/kits/interface/PicturePlayer.cpp

@@ -18,9 +18,12 @@
 #include <string.h>
 
 #include <AffineTransform.h>
+#include <DataIO.h>
+#include <Gradient.h>
 #include <PictureProtocol.h>
 #include <Shape.h>
 
+#include <AutoDeleter.h>
 #include <StackOrHeapArray.h>
 
 
@@ -520,6 +523,88 @@ draw_string_locations(void* _context, const char* _string, size_t length,
 }
 
 
+static void
+draw_rect_gradient(void* _context, const BRect& rect, BGradient& gradient, bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+	((void (*)(void*, BRect, BGradient&))context->function_table[fill ? 56 : 57])(
+		context->user_data, rect, gradient);
+}
+
+
+static void
+draw_round_rect_gradient(void* _context, const BRect& rect, const BPoint& radii, BGradient& gradient,
+	bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+	((void (*)(void*, BRect, BPoint, BGradient&))context->function_table[fill ? 58 : 59])(
+		context->user_data, rect, radii, gradient);
+}
+
+
+static void
+draw_bezier_gradient(void* _context, size_t numPoints, const BPoint _points[], BGradient& gradient, bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+	if (numPoints != 4)
+		return;
+
+	BPoint points[4] = { _points[0], _points[1], _points[2], _points[3] };
+	((void (*)(void*, BPoint*, BGradient&))context->function_table[fill ? 60 : 61])(
+		context->user_data, points, gradient);
+}
+
+
+static void
+draw_arc_gradient(void* _context, const BPoint& center, const BPoint& radii,
+	float startTheta, float arcTheta, BGradient& gradient, bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+	((void (*)(void*, BPoint, BPoint, float, float, BGradient&))
+		context->function_table[fill ? 62 : 63])(context->user_data, center,
+			radii, startTheta, arcTheta, gradient);
+}
+
+
+static void
+draw_ellipse_gradient(void* _context, const BRect& rect, BGradient& gradient, bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+	BPoint radii((rect.Width() + 1) / 2.0f, (rect.Height() + 1) / 2.0f);
+	BPoint center = rect.LeftTop() + radii;
+	((void (*)(void*, BPoint, BPoint, BGradient&))
+		context->function_table[fill ? 64 : 65])(context->user_data, center,
+			radii, gradient);
+}
+
+
+static void
+draw_polygon_gradient(void* _context, size_t numPoints, const BPoint _points[],
+	bool isClosed, BGradient& gradient, bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+
+	BStackOrHeapArray<BPoint, 200> points(numPoints);
+	if (!points.IsValid())
+		return;
+
+	memcpy((void*)points, _points, numPoints * sizeof(BPoint));
+
+	((void (*)(void*, int32, BPoint*, bool, BGradient&))
+		context->function_table[fill ? 66 : 67])(context->user_data, numPoints,
+			points, isClosed, gradient);
+}
+
+
+static void
+draw_shape_gradient(void* _context, const BShape& shape, BGradient& gradient, bool fill)
+{
+	adapter_context* context = reinterpret_cast<adapter_context*>(_context);
+	((void (*)(void*, BShape, BGradient&))context->function_table[fill ? 68 : 69])(
+		context->user_data, shape, gradient);
+}
+
+
 
 #if DEBUG > 1
 static const char *
@@ -655,7 +740,14 @@ PicturePlayer::Play(void** callBackTable, int32 tableEntries, void* userData)
 		blend_layer,
 		clip_to_rect,
 		clip_to_shape,
-		draw_string_locations
+		draw_string_locations,
+		draw_rect_gradient,
+		draw_round_rect_gradient,
+		draw_bezier_gradient,
+		draw_arc_gradient,
+		draw_ellipse_gradient,
+		draw_polygon_gradient,
+		draw_shape_gradient
 	};
 
 	// We don't check if the functions in the table are NULL, but we
@@ -719,6 +811,20 @@ public:
 			return true;
 		}
 
+		bool GetGradient(BGradient*& gradient)
+		{
+			BMemoryIO stream(fBuffer, fRemaining);
+			printf("fRemaining: %ld\n", fRemaining);
+			if (BGradient::Unflatten(gradient, &stream) != B_OK) {
+				printf("BGradient::Unflatten(_gradient, &stream) != B_OK\n");
+				return false;
+			}
+
+			fRemaining -= stream.Position();
+			fBuffer += stream.Position();
+			return true;
+		}
+
 		template<typename T>
 		bool
 		GetRemaining(const T*& buffer, size_t& size)
@@ -936,6 +1042,141 @@ PicturePlayer::_Play(const picture_player_callbacks& callbacks, void* userData,
 				break;
 			}
 
+			case B_PIC_STROKE_RECT_GRADIENT:
+			case B_PIC_FILL_RECT_GRADIENT:
+			{
+				const BRect* rect;
+				BGradient* gradient;
+				if (callbacks.draw_rect_gradient == NULL || !reader.Get(rect) || !reader.GetGradient(gradient))
+					break;
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				callbacks.draw_rect_gradient(userData, *rect, *gradient,
+					header->op == B_PIC_FILL_RECT_GRADIENT);
+				break;
+			}
+
+			case B_PIC_STROKE_ROUND_RECT_GRADIENT:
+			case B_PIC_FILL_ROUND_RECT_GRADIENT:
+			{
+				const BRect* rect;
+				const BPoint* radii;
+				BGradient* gradient;
+				if (callbacks.draw_round_rect_gradient == NULL || !reader.Get(rect)
+					|| !reader.Get(radii) || !reader.GetGradient(gradient)) {
+					break;
+				}
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				callbacks.draw_round_rect_gradient(userData, *rect, *radii, *gradient,
+					header->op == B_PIC_FILL_ROUND_RECT_GRADIENT);
+				break;
+			}
+
+			case B_PIC_STROKE_BEZIER_GRADIENT:
+			case B_PIC_FILL_BEZIER_GRADIENT:
+			{
+				const size_t kNumControlPoints = 4;
+				const BPoint* controlPoints;
+				BGradient* gradient;
+				if (callbacks.draw_bezier_gradient == NULL
+					|| !reader.Get(controlPoints, kNumControlPoints) || !reader.GetGradient(gradient)) {
+					break;
+				}
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				callbacks.draw_bezier_gradient(userData, kNumControlPoints,
+					controlPoints, *gradient, header->op == B_PIC_FILL_BEZIER_GRADIENT);
+				break;
+			}
+
+			case B_PIC_STROKE_POLYGON_GRADIENT:
+			case B_PIC_FILL_POLYGON_GRADIENT:
+			{
+				const uint32* numPoints;
+				const BPoint* points;
+				BGradient* gradient;
+				if (callbacks.draw_polygon_gradient == NULL || !reader.Get(numPoints)
+					|| !reader.Get(points, *numPoints)) {
+					break;
+				}
+
+				bool isClosed = true;
+				const bool* closedPointer;
+				if (header->op != B_PIC_FILL_POLYGON_GRADIENT) {
+					if (!reader.Get(closedPointer))
+						break;
+
+					isClosed = *closedPointer;
+				}
+
+				if (!reader.GetGradient(gradient))
+					break;
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				callbacks.draw_polygon_gradient(userData, *numPoints, points, isClosed, *gradient,
+					header->op == B_PIC_FILL_POLYGON_GRADIENT);
+				break;
+			}
+
+			case B_PIC_STROKE_SHAPE_GRADIENT:
+			case B_PIC_FILL_SHAPE_GRADIENT:
+			{
+				const uint32* opCount;
+				const uint32* pointCount;
+				const uint32* opList;
+				const BPoint* pointList;
+				BGradient* gradient;
+				if (callbacks.draw_shape_gradient == NULL || !reader.Get(opCount)
+					|| !reader.Get(pointCount) || !reader.Get(opList, *opCount)
+					|| !reader.Get(pointList, *pointCount) || !reader.GetGradient(gradient)) {
+					break;
+				}
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				// TODO: remove BShape data copying
+				BShape shape;
+				shape.SetData(*opCount, *pointCount, opList, pointList);
+
+				callbacks.draw_shape_gradient(userData, shape, *gradient,
+					header->op == B_PIC_FILL_SHAPE_GRADIENT);
+				break;
+			}
+
+			case B_PIC_STROKE_ARC_GRADIENT:
+			case B_PIC_FILL_ARC_GRADIENT:
+			{
+				const BPoint* center;
+				const BPoint* radii;
+				const float* startTheta;
+				const float* arcTheta;
+				BGradient* gradient;
+				if (callbacks.draw_arc_gradient == NULL || !reader.Get(center)
+					|| !reader.Get(radii) || !reader.Get(startTheta)
+					|| !reader.Get(arcTheta) || !reader.GetGradient(gradient)) {
+					break;
+				}
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				callbacks.draw_arc_gradient(userData, *center, *radii, *startTheta,
+					*arcTheta, *gradient, header->op == B_PIC_FILL_ARC_GRADIENT);
+				break;
+			}
+
+			case B_PIC_STROKE_ELLIPSE_GRADIENT:
+			case B_PIC_FILL_ELLIPSE_GRADIENT:
+			{
+				const BRect* rect;
+				BGradient* gradient;
+				if (callbacks.draw_ellipse_gradient == NULL || !reader.Get(rect) || !reader.GetGradient(gradient))
+					break;
+				ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+				callbacks.draw_ellipse_gradient(userData, *rect, *gradient,
+					header->op == B_PIC_FILL_ELLIPSE_GRADIENT);
+				break;
+			}
+
 			case B_PIC_DRAW_STRING:
 			{
 				const float* escapementSpace;

src/servers/app/ServerPicture.cpp

@@ -49,7 +49,7 @@ using std::stack;
 
 class ShapePainter : public BShapeIterator {
 public:
-	ShapePainter(Canvas* canvas);
+	ShapePainter(Canvas* canvas, BGradient* gradient);
 	virtual ~ShapePainter();
 
 	status_t Iterate(const BShape* shape);
@@ -65,14 +65,16 @@ public:
 
 private:
 	Canvas*	fCanvas;
+	BGradient* fGradient;
 	stack<uint32>	fOpStack;
 	stack<BPoint>	fPtStack;
 };
 
 
-ShapePainter::ShapePainter(Canvas* canvas)
+ShapePainter::ShapePainter(Canvas* canvas, BGradient* gradient)
 	:
-	fCanvas(canvas)
+	fCanvas(canvas),
+	fGradient(gradient)
 {
 }
 
@@ -217,8 +219,14 @@ ShapePainter::Draw(BRect frame, bool filled)
 		transform.Apply(&screenOffset);
 		transform.Apply(&frame);
 
-		fCanvas->GetDrawingEngine()->DrawShape(frame, opCount, opList,
-			ptCount, ptList, filled, screenOffset, fCanvas->Scale());
+		/* stroked gradients are not yet supported */
+		if (fGradient != NULL && filled) {
+			fCanvas->GetDrawingEngine()->FillShape(frame, opCount, opList,
+				ptCount, ptList, *fGradient, screenOffset, fCanvas->Scale());
+		} else {
+			fCanvas->GetDrawingEngine()->DrawShape(frame, opCount, opList,
+				ptCount, ptList, filled, screenOffset, fCanvas->Scale());
+		}
 
 		delete[] opList;
 		delete[] ptList;
@@ -381,7 +389,125 @@ static void
 draw_shape(void* _canvas, const BShape& shape, bool fill)
 {
 	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
-	ShapePainter drawShape(canvas);
+	ShapePainter drawShape(canvas, NULL);
+
+	drawShape.Iterate(&shape);
+	drawShape.Draw(shape.Bounds(), fill);
+}
+
+
+static void
+draw_rect_gradient(void* _canvas, const BRect& _rect, BGradient& gradient, bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+	BRect rect = _rect;
+
+	const SimpleTransform transform =
+		canvas->PenToScreenTransform();
+	transform.Apply(&rect);
+	transform.Apply(&gradient);
+
+	canvas->GetDrawingEngine()->FillRect(rect, gradient);
+}
+
+
+static void
+draw_round_rect_gradient(void* _canvas, const BRect& _rect, const BPoint& radii, BGradient& gradient,
+	bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+	BRect rect = _rect;
+
+	const SimpleTransform transform =
+		canvas->PenToScreenTransform();
+	transform.Apply(&rect);
+	transform.Apply(&gradient);
+	float scale = canvas->CurrentState()->CombinedScale();
+	canvas->GetDrawingEngine()->FillRoundRect(rect, radii.x * scale,
+		radii.y * scale, gradient);
+}
+
+
+static void
+draw_bezier_gradient(void* _canvas, size_t numPoints, const BPoint viewPoints[], BGradient& gradient,
+	bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+
+	const size_t kSupportedPoints = 4;
+	if (numPoints != kSupportedPoints)
+		return;
+
+	BPoint points[kSupportedPoints];
+	const SimpleTransform transform =
+		canvas->PenToScreenTransform();
+	transform.Apply(points, viewPoints, kSupportedPoints);
+	transform.Apply(&gradient);
+	canvas->GetDrawingEngine()->FillBezier(points, gradient);
+}
+
+
+static void
+draw_arc_gradient(void* _canvas, const BPoint& center, const BPoint& radii,
+	float startTheta, float arcTheta, BGradient& gradient, bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+
+	BRect rect(center.x - radii.x, center.y - radii.y,
+		center.x + radii.x - 1, center.y + radii.y - 1);
+	const SimpleTransform transform =
+		canvas->PenToScreenTransform();
+	transform.Apply(&rect);
+	transform.Apply(&gradient);
+	canvas->GetDrawingEngine()->FillArc(rect, startTheta, arcTheta, gradient);
+}
+
+
+static void
+draw_ellipse_gradient(void* _canvas, const BRect& _rect, BGradient& gradient, bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+	BRect rect = _rect;
+
+	const SimpleTransform transform =
+		canvas->PenToScreenTransform();
+	transform.Apply(&rect);
+	transform.Apply(&gradient);
+	canvas->GetDrawingEngine()->FillEllipse(rect, gradient);
+}
+
+
+static void
+draw_polygon_gradient(void* _canvas, size_t numPoints, const BPoint viewPoints[],
+	bool isClosed, BGradient& gradient, bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+
+	if (numPoints == 0)
+		return;
+
+	BStackOrHeapArray<BPoint, 200> points(numPoints);
+	if (!points.IsValid())
+		return;
+
+	const SimpleTransform transform =
+		canvas->PenToScreenTransform();
+	transform.Apply(points, viewPoints, numPoints);
+	transform.Apply(&gradient);
+
+	BRect polyFrame;
+	get_polygon_frame(points, numPoints, &polyFrame);
+
+	canvas->GetDrawingEngine()->FillPolygon(points, numPoints, polyFrame,
+		gradient, isClosed && numPoints > 2);
+}
+
+
+static void
+draw_shape_gradient(void* _canvas, const BShape& shape, BGradient& gradient, bool fill)
+{
+	Canvas* const canvas = reinterpret_cast<Canvas*>(_canvas);
+	ShapePainter drawShape(canvas, &gradient);
 
 	drawShape.Iterate(&shape);
 	drawShape.Draw(shape.Bounds(), fill);
@@ -929,7 +1055,14 @@ static const BPrivate::picture_player_callbacks kPicturePlayerCallbacks = {
 	blend_layer,
 	clip_to_rect,
 	clip_to_shape,
-	draw_string_locations
+	draw_string_locations,
+	draw_rect_gradient,
+	draw_round_rect_gradient,
+	draw_bezier_gradient,
+	draw_arc_gradient,
+	draw_ellipse_gradient,
+	draw_polygon_gradient,
+	draw_shape_gradient
 };
 
 

src/servers/app/ServerWindow.cpp

@@ -3507,6 +3507,193 @@ ServerWindow::_DispatchPictureMessage(int32 code, BPrivate::LinkReceiver& link)
 			break;
 		}
 
+		//case AS_STROKE_RECT_GRADIENT:
+		case AS_FILL_RECT_GRADIENT:
+		{
+			BRect rect;
+			link.Read<BRect>(&rect);
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			picture->WriteDrawRectGradient(rect, *gradient, code == AS_FILL_RECT_GRADIENT);
+			break;
+		}
+
+		//case AS_STROKE_ARC_GRADIENT:
+		case AS_FILL_ARC_GRADIENT:
+		{
+			BRect rect;
+			link.Read<BRect>(&rect);
+			float startTheta, arcTheta;
+			link.Read<float>(&startTheta);
+			link.Read<float>(&arcTheta);
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			BPoint radii((rect.Width() + 1) / 2, (rect.Height() + 1) / 2);
+			BPoint center = rect.LeftTop() + radii;
+
+			picture->WriteDrawArcGradient(center, radii, startTheta, arcTheta, *gradient,
+				code == AS_FILL_ARC_GRADIENT);
+			break;
+		}
+
+		//case AS_STROKE_BEZIER_GRADIENT:
+		case AS_FILL_BEZIER_GRADIENT:
+		{
+			BPoint points[4];
+			for (int32 i = 0; i < 4; i++) {
+				link.Read<BPoint>(&(points[i]));
+			}
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			picture->WriteDrawBezierGradient(points, *gradient, code == AS_FILL_BEZIER_GRADIENT);
+			break;
+		}
+
+		//case AS_STROKE_ELLIPSE_GRADIENT:
+		case AS_FILL_ELLIPSE_GRADIENT:
+		{
+			BRect rect;
+			link.Read<BRect>(&rect);
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			picture->WriteDrawEllipseGradient(rect, *gradient, code == AS_FILL_ELLIPSE_GRADIENT);
+			break;
+		}
+
+		//case AS_STROKE_ROUNDRECT_GRADIENT:
+		case AS_FILL_ROUNDRECT_GRADIENT:
+		{
+			BRect rect;
+			link.Read<BRect>(&rect);
+
+			BPoint radii;
+			link.Read<float>(&radii.x);
+			link.Read<float>(&radii.y);
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			picture->WriteDrawRoundRectGradient(rect, radii, *gradient, code == AS_FILL_ROUNDRECT_GRADIENT);
+			break;
+		}
+
+		//case AS_STROKE_TRIANGLE_GRADIENT:
+		case AS_FILL_TRIANGLE_GRADIENT:
+		{
+			// There is no B_PIC_FILL/STROKE_TRIANGLE op,
+			// we implement it using B_PIC_FILL/STROKE_POLYGON
+			BPoint points[3];
+
+			for (int32 i = 0; i < 3; i++) {
+				link.Read<BPoint>(&(points[i]));
+			}
+
+			BRect rect;
+			link.Read<BRect>(&rect);
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			picture->WriteDrawPolygonGradient(3, points,
+					true, *gradient, code == AS_FILL_TRIANGLE_GRADIENT);
+			break;
+		}
+
+		//case AS_STROKE_POLYGON_GRADIENT:
+		case AS_FILL_POLYGON_GRADIENT:
+		{
+			BRect polyFrame;
+			bool isClosed = true;
+			int32 pointCount;
+			const bool fill = (code == AS_FILL_POLYGON_GRADIENT);
+
+			link.Read<BRect>(&polyFrame);
+			if (code == AS_STROKE_POLYGON)
+				link.Read<bool>(&isClosed);
+			link.Read<int32>(&pointCount);
+
+			ArrayDeleter<BPoint> pointList(new(nothrow) BPoint[pointCount]);
+			if (link.Read(pointList.Get(), pointCount * sizeof(BPoint)) != B_OK)
+				break;
+
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			picture->WriteDrawPolygonGradient(pointCount, pointList.Get(),
+				isClosed && pointCount > 2, *gradient, fill);
+			break;
+		}
+
+		//case AS_STROKE_SHAPE_GRADIENT:
+		case AS_FILL_SHAPE_GRADIENT:
+		{
+			BRect shapeFrame;
+			int32 opCount;
+			int32 ptCount;
+
+			link.Read<BRect>(&shapeFrame);
+			link.Read<int32>(&opCount);
+			link.Read<int32>(&ptCount);
+
+			ArrayDeleter<uint32> opList(new(std::nothrow) uint32[opCount]);
+			ArrayDeleter<BPoint> ptList(new(std::nothrow) BPoint[ptCount]);
+			if (opList.Get() == NULL || ptList.Get() == NULL
+				|| link.Read(opList.Get(), opCount * sizeof(uint32)) != B_OK
+				|| link.Read(ptList.Get(), ptCount * sizeof(BPoint)) != B_OK)
+				break;
+
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			// This might seem a bit weird, but under BeOS, the shapes
+			// are always offset by the current pen location
+			BPoint penLocation
+				= fCurrentView->CurrentState()->PenLocation();
+			for (int32 i = 0; i < ptCount; i++) {
+				ptList.Get()[i] += penLocation;
+			}
+			const bool fill = (code == AS_FILL_SHAPE_GRADIENT);
+			picture->WriteDrawShapeGradient(opCount, opList.Get(), ptCount, ptList.Get(), *gradient, fill);
+
+			break;
+		}
+
+		case AS_FILL_REGION_GRADIENT:
+		{
+			// There is no B_PIC_FILL_REGION op, we have to
+			// implement it using B_PIC_FILL_RECT
+			BRegion region;
+			if (link.ReadRegion(&region) < B_OK)
+				break;
+
+			BGradient* gradient;
+			if (link.ReadGradient(&gradient) != B_OK)
+				break;
+			ObjectDeleter<BGradient> gradientDeleter(gradient);
+
+			for (int32 i = 0; i < region.CountRects(); i++)
+				picture->WriteDrawRectGradient(region.RectAt(i), *gradient, true);
+			break;
+		}
+
 		case AS_STROKE_LINE:
 		{
 			ViewStrokeLineInfo info;