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/*
 * Copyright 2006-2018 Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Stefano Ceccherini, stefano.ceccherini@gmail.com
 *		Julian Harnath, <julian.harnath@rwth-achen.de>
 *		Stephan Aßmus <superstippi@gmx.de>
 */

#include <PictureDataWriter.h>

#include <stdio.h>
#include <string.h>

#include <DataIO.h>
#include <Point.h>
#include <Rect.h>
#include <Region.h>

#include <PictureProtocol.h>

#define THROW_ERROR(error) throw (status_t)(error)


// TODO: Review writing of strings. AFAIK in the picture data format
// They are not supposed to be NULL terminated
// (at least, it's not mandatory) so we should write their size too.
PictureDataWriter::PictureDataWriter()
	:
	fData(NULL)
{
}


PictureDataWriter::PictureDataWriter(BPositionIO* data)
	:
	fData(data)
{
}


PictureDataWriter::~PictureDataWriter()
{
}


status_t
PictureDataWriter::SetTo(BPositionIO* data)
{
	if (data == NULL)
		return B_BAD_VALUE;

	fData = data;

	return B_OK;
}


status_t
PictureDataWriter::WriteSetOrigin(const BPoint& point)
{
	try {
		BeginOp(B_PIC_SET_ORIGIN);
		Write<BPoint>(point);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteInvertRect(const BRect& rect)
{
	try {
		WritePushState();
		WriteSetDrawingMode(B_OP_INVERT);

		BeginOp(B_PIC_FILL_RECT);
		Write<BRect>(rect);
		EndOp();

		WritePopState();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetDrawingMode(const drawing_mode& mode)
{
	try {
		BeginOp(B_PIC_SET_DRAWING_MODE);
		Write<int16>((int16)mode);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetPenLocation(const BPoint& point)
{
	try {
		BeginOp(B_PIC_SET_PEN_LOCATION);
		Write<BPoint>(point);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetPenSize(const float& penSize)
{
	try {
		BeginOp(B_PIC_SET_PEN_SIZE);
		Write<float>(penSize);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetLineMode(const cap_mode& cap, const join_mode& join,
	const float& miterLimit)
{
	try {
		BeginOp(B_PIC_SET_LINE_MODE);
		Write<int16>((int16)cap);
		Write<int16>((int16)join);
		Write<float>(miterLimit);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetScale(const float& scale)
{
	try {
		BeginOp(B_PIC_SET_SCALE);
		Write<float>(scale);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetTransform(BAffineTransform transform)
{
	try {
		BeginOp(B_PIC_SET_TRANSFORM);
		Write<BAffineTransform>(transform);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteTranslateBy(double x, double y)
{
	try {
		BeginOp(B_PIC_AFFINE_TRANSLATE);
		Write<double>(x);
		Write<double>(y);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteScaleBy(double x, double y)
{
	try {
		BeginOp(B_PIC_AFFINE_SCALE);
		Write<double>(x);
		Write<double>(y);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteRotateBy(double angleRadians)
{
	try {
		BeginOp(B_PIC_AFFINE_ROTATE);
		Write<double>(angleRadians);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetPattern(const ::pattern& pattern)
{
	try {
		BeginOp(B_PIC_SET_STIPLE_PATTERN);
		Write< ::pattern>(pattern);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteClipToPicture(int32 pictureToken,
						const BPoint& origin, bool inverse)
{
	// TODO: I don't know if it's compatible with R5's BPicture version
	try {
		BeginOp(B_PIC_CLIP_TO_PICTURE);
		Write<int32>(pictureToken);
		Write<BPoint>(origin);
		Write<bool>(inverse);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetClipping(const BRegion& region)
{
	// TODO: I don't know if it's compatible with R5's BPicture version
	try {
		const int32 numRects = region.CountRects();
		if (numRects > 0 && region.Frame().IsValid()) {
			BeginOp(B_PIC_SET_CLIPPING_RECTS);
			Write<uint32>(numRects);
			for (int32 i = 0; i < numRects; i++)
				Write<BRect>(region.RectAt(i));

			EndOp();
		} else
			WriteClearClipping();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteClearClipping()
{
	try {
		BeginOp(B_PIC_CLEAR_CLIPPING_RECTS);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetHighColor(const rgb_color& color)
{
	try {
		BeginOp(B_PIC_SET_FORE_COLOR);
		Write<rgb_color>(color);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetLowColor(const rgb_color& color)
{
	try {
		BeginOp(B_PIC_SET_BACK_COLOR);
		Write<rgb_color>(color);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawRect(const BRect& rect, const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_RECT : B_PIC_STROKE_RECT);
		Write<BRect>(rect);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawRoundRect(const BRect& rect, const BPoint& radius,
	const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_ROUND_RECT : B_PIC_STROKE_ROUND_RECT);
		Write<BRect>(rect);
		Write<BPoint>(radius);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawEllipse(const BRect& rect, const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_ELLIPSE : B_PIC_STROKE_ELLIPSE);
		Write<BRect>(rect);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawArc(const BPoint& center, const BPoint& radius,
	const float& startTheta, const float& arcTheta, const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_ARC : B_PIC_STROKE_ARC);
		Write<BPoint>(center);
		Write<BPoint>(radius);
		Write<float>(startTheta);
		Write<float>(arcTheta);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawPolygon(const int32& numPoints, BPoint* points,
	const bool& isClosed, const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_POLYGON : B_PIC_STROKE_POLYGON);
		Write<int32>(numPoints);
		for (int32 i = 0; i < numPoints; i++)
			Write<BPoint>(points[i]);

		if (!fill)
			Write<uint8>((uint8)isClosed);

		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawBezier(const BPoint points[4], const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_BEZIER : B_PIC_STROKE_BEZIER);
		for (int32 i = 0; i < 4; i++)
			Write<BPoint>(points[i]);

		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteStrokeLine(const BPoint& start, const BPoint& end)
{
	try {
		BeginOp(B_PIC_STROKE_LINE);
		Write<BPoint>(start);
		Write<BPoint>(end);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawString(const BPoint& where, const char* string,
	const int32& length, const escapement_delta& escapement)
{
	try {
		BeginOp(B_PIC_SET_PEN_LOCATION);
		Write<BPoint>(where);
		EndOp();

		BeginOp(B_PIC_DRAW_STRING);
		Write<float>(escapement.space);
		Write<float>(escapement.nonspace);
		//WriteData(string, length + 1);
			// TODO: is string 0 terminated? why is length given?
		WriteData(string, length);
		Write<uint8>(0);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawString(const char* string,
	int32 length, const BPoint* locations, int32 locationCount)
{
	try {
		BeginOp(B_PIC_DRAW_STRING_LOCATIONS);
		Write<int32>(locationCount);
		for (int32 i = 0; i < locationCount; i++) {
			Write<BPoint>(locations[i]);
		}
		WriteData(string, length);
		Write<uint8>(0);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawShape(const int32& opCount, const void* opList,
	const int32& ptCount, const void* ptList, const bool& fill)
{
	try {
		BeginOp(fill ? B_PIC_FILL_SHAPE : B_PIC_STROKE_SHAPE);
		Write<int32>(opCount);
		Write<int32>(ptCount);
		WriteData(opList, opCount * sizeof(uint32));
		WriteData(ptList, ptCount * sizeof(BPoint));
		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,
	const int32& colorSpace, const int32& flags, const void* data,
	const int32& length)
{
	if (length != height * bytesPerRow)
		debugger("PictureDataWriter::WriteDrawBitmap: invalid length");
	try {
		BeginOp(B_PIC_DRAW_PIXELS);
		Write<BRect>(srcRect);
		Write<BRect>(dstRect);
		Write<int32>(width);
		Write<int32>(height);
		Write<int32>(bytesPerRow);
		Write<int32>(colorSpace);
		Write<int32>(flags);
		WriteData(data, length);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteDrawPicture(const BPoint& where, const int32& token)
{
	// TODO: I'm not sure about this function. I think we need
	// to attach the picture data too.
	// The token won't be sufficient in many cases (for example, when
	// we archive/flatten the picture.
	try {
		BeginOp(B_PIC_DRAW_PICTURE);
		Write<BPoint>(where);
		Write<int32>(token);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontFamily(const font_family family)
{
	try {
		BeginOp(B_PIC_SET_FONT_FAMILY);
		WriteData(family, strlen(family));
		Write<uint8>(0);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontStyle(const font_style style)
{
	try {
		BeginOp(B_PIC_SET_FONT_STYLE);
		WriteData(style, strlen(style));
		Write<uint8>(0);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontSpacing(const int32& spacing)
{
	try {
		BeginOp(B_PIC_SET_FONT_SPACING);
		Write<int32>(spacing);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontSize(const float& size)
{
	try {
		BeginOp(B_PIC_SET_FONT_SIZE);
		Write<float>(size);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontRotation(const float& rotation)
{
	try {
		BeginOp(B_PIC_SET_FONT_ROTATE);
		Write<float>(rotation);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontEncoding(const int32& encoding)
{
	try {
		BeginOp(B_PIC_SET_FONT_ENCODING);
		Write<int32>(encoding);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontFlags(const int32& flags)
{
	try {
		BeginOp(B_PIC_SET_FONT_FLAGS);
		Write<int32>(flags);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontShear(const float& shear)
{
	try {
		BeginOp(B_PIC_SET_FONT_SHEAR);
		Write<float>(shear);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteSetFontFace(const int32& face)
{
	try {
		BeginOp(B_PIC_SET_FONT_FACE);
		Write<int32>(face);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WritePushState()
{
	try {
		BeginOp(B_PIC_PUSH_STATE);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WritePopState()
{
	try {
		BeginOp(B_PIC_POP_STATE);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteBlendLayer(Layer* layer)
{
	try {
		BeginOp(B_PIC_BLEND_LAYER);
		Write<Layer*>(layer);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteClipToRect(const BRect& rect, bool inverse)
{
	try {
		BeginOp(B_PIC_CLIP_TO_RECT);
		Write<bool>(inverse);
		Write<BRect>(rect);
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


status_t
PictureDataWriter::WriteClipToShape(int32 opCount, const void* opList,
	int32 ptCount, const void* ptList, bool inverse)
{
	try {
		BeginOp(B_PIC_CLIP_TO_SHAPE);
		Write<bool>(inverse);
		Write<int32>(opCount);
		Write<int32>(ptCount);
		WriteData(opList, opCount * sizeof(uint32));
		WriteData(ptList, ptCount * sizeof(BPoint));
		EndOp();
	} catch (status_t& status) {
		return status;
	}

	return B_OK;
}


// private
void
PictureDataWriter::BeginOp(const int16& op)
{
	if (fData == NULL)
		THROW_ERROR(B_NO_INIT);

	fStack.push(fData->Position());
	fData->Write(&op, sizeof(op));

	// Init the size of the opcode block to 0
	int32 size = 0;
	fData->Write(&size, sizeof(size));
}


void
PictureDataWriter::EndOp()
{
	if (fData == NULL)
		THROW_ERROR(B_NO_INIT);

	off_t curPos = fData->Position();
	off_t stackPos = fStack.top();
	fStack.pop();

	// The size of the op is calculated like this:
	// current position on the stream minus the position on the stack,
	// minus the space occupied by the op code itself (int16)
	// and the space occupied by the size field (int32)
	int32 size = curPos - stackPos - sizeof(int32) - sizeof(int16);

	// Size was set to 0 in BeginOp()
	// Now we overwrite it with the correct value
	fData->Seek(stackPos + sizeof(int16), SEEK_SET);
	fData->Write(&size, sizeof(size));
	fData->Seek(curPos, SEEK_SET);
}


void
PictureDataWriter::WriteData(const void* data, size_t size)
{
	ssize_t result = fData->Write(data, size);
	if (result < 0)
		THROW_ERROR(result);

	if ((size_t)result != size)
		THROW_ERROR(B_IO_ERROR);
}