haiku-beta6/src/servers/app/server/ScreenDriver.cpp

//------------------------------------------------------------------------------
//	Copyright (c) 2001-2002, OpenBeOS
//
//	Permission is hereby granted, free of charge, to any person obtaining a
//	copy of this software and associated documentation files (the "Software"),
//	to deal in the Software without restriction, including without limitation
//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
//	and/or sell copies of the Software, and to permit persons to whom the
//	Software is furnished to do so, subject to the following conditions:
//
//	The above copyright notice and this permission notice shall be included in
//	all copies or substantial portions of the Software.
//
//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
//	DEALINGS IN THE SOFTWARE.
//
//	File Name:		ScreenDriver.cpp
//	Author:			DarkWyrm <[email protected]>
//					Gabe Yoder <[email protected]>
//	Description:	BWindowScreen graphics module
//  
//------------------------------------------------------------------------------
#include "Angle.h"
#include "ScreenDriver.h"
#include "ServerProtocol.h"
#include "ServerBitmap.h"
#include "ServerCursor.h"
#include "ServerConfig.h"
#include "SystemPalette.h"
#include "ColorUtils.h"
#include "PortLink.h"
#include "FontFamily.h"
#include "RGBColor.h"
#include "LayerData.h"
#include <View.h>
#include <stdio.h>
#include <string.h>
#include <String.h>
#include <math.h>

//TODO: Remove the need for these
int64 solidhigh64=0xFFFFFFFFLL;
int8 *solidhigh=(int8*)solidhigh64;

void HLine_32Bit(graphics_card_info i, uint16 x, uint16 y, uint16 length, rgb_color col);
void HLine_16Bit(graphics_card_info i, uint16 x, uint16 y, uint16 length, uint16 col);
void HLine_16Bit(graphics_card_info i, uint16 x, uint16 y, uint16 length, uint8 col);

class LineCalc
{
public:
	LineCalc(const BPoint &pta, const BPoint &ptb);
	float GetX(float y);
	float GetY(float x);
	float Slope(void) { return slope; }
	float Offset(void) { return offset; }
private:
	float slope;
	float offset;
	BPoint start, end;
};

LineCalc::LineCalc(const BPoint &pta, const BPoint &ptb)
{
	start=pta;
	end=ptb;
	slope=(start.y-end.y)/(start.x-end.x);
	offset=start.y-(slope * start.x);
}

float LineCalc::GetX(float y)
{
	return ( (y-offset)/slope );
}

float LineCalc::GetY(float x)
{
	return ( (slope * x) + offset );
}

FrameBuffer::FrameBuffer(const char *title, uint32 space, status_t *st,bool debug)
	: BWindowScreen(title,space,st,debug)
{
	is_connected=false;
	port_id serverport=find_port(SERVER_INPUT_PORT);
	serverlink=new PortLink(serverport);
	mousepos.Set(0,0);
	buttons=0;
}

FrameBuffer::~FrameBuffer(void)
{
	delete serverlink;
}

void FrameBuffer::ScreenConnected(bool connected)
{
	is_connected=connected;
	if(connected)
	{
		// Cache the state just in case
		graphics_card_info *info=CardInfo();
		gcinfo=*info;
	}
}

void FrameBuffer::MessageReceived(BMessage *msg)
{
	switch(msg->what)
	{
		case B_KEY_DOWN:
		{
			int32 key,modifiers;
			msg->FindInt32("key",&key);
			msg->FindInt32("modifiers",&modifiers);

			int32 servermods=0;
			servermods|=modifiers & B_RIGHT_COMMAND_KEY;
			servermods|=modifiers & B_RIGHT_OPTION_KEY;
			servermods|=modifiers & B_RIGHT_CONTROL_KEY;
			servermods|=modifiers & B_SHIFT_KEY;
			
			switch(key)
			{
				case 0x47:	// Enter key
				{
					port_id serverport=find_port(SERVER_PORT_NAME);
					write_port(serverport,B_QUIT_REQUESTED,NULL,0);
					break;
				}
#ifdef ENABLE_INPUT_SERVER_EMULATION
				case 0x57:	// up arrow
				{
					// Attach data:
					// 1) int64 - time of mouse click
					// 2) float - x coordinate of mouse click
					// 3) float - y coordinate of mouse click
					// 4) int32 - modifier keys down
					// 5) int32 - buttons down
					// 6) int32 - clicks
					
					
					if(mousepos.y<=0)
					{
						mousepos.y=0;
						break;
					}
					
					uint32 clicks=1; // can't get the # of clicks without a *lot* of extra work :(
					int64 time=(int64)real_time_clock();
					
					if(modifiers & B_SHIFT_KEY)
						mousepos.y--;
					else
					{
						mousepos.y-=10;
						if(mousepos.y<0)
							mousepos.y=0;
					}

					serverlink->SetOpCode(B_MOUSE_MOVED);
					serverlink->Attach(&time, sizeof(int64));
					serverlink->Attach(&mousepos.x,sizeof(float));
					serverlink->Attach(&mousepos.y,sizeof(float));
					serverlink->Attach(&servermods, sizeof(int32));
					serverlink->Attach(&buttons, sizeof(uint32));
					serverlink->Attach(&clicks, sizeof(uint32));
					serverlink->Flush();
					break;
				}
				case 0x62:	// down arrow
				{
					// Attach data:
					// 1) int64 - time of mouse click
					// 2) float - x coordinate of mouse click
					// 3) float - y coordinate of mouse click
					// 4) int32 - modifier keys down
					// 5) int32 - buttons down
					// 6) int32 - clicks
					
					
					if(mousepos.y>= (gcinfo.height-1))
					{
						mousepos.y=gcinfo.height-1;
						break;
					}
					
					uint32 clicks=1; // can't get the # of clicks without a *lot* of extra work :(
					int64 time=(int64)real_time_clock();
					
					if(modifiers & B_SHIFT_KEY)
						mousepos.y++;
					else
					{
						mousepos.y+=10;
						if(mousepos.y>gcinfo.height-1)
							mousepos.y=gcinfo.height-1;
					}

					serverlink->SetOpCode(B_MOUSE_MOVED);
					serverlink->Attach(&time, sizeof(int64));
					serverlink->Attach(&mousepos.x,sizeof(float));
					serverlink->Attach(&mousepos.y,sizeof(float));
					serverlink->Attach(&servermods, sizeof(int32));
					serverlink->Attach(&buttons, sizeof(uint32));
					serverlink->Attach(&clicks, sizeof(uint32));
					serverlink->Flush();
					break;
				}
				case 0x61:	// left arrow
				{
					// Attach data:
					// 1) int64 - time of mouse click
					// 2) float - x coordinate of mouse click
					// 3) float - y coordinate of mouse click
					// 4) int32 - modifier keys down
					// 5) int32 - buttons down
					// 6) int32 - clicks
					
					
					if(mousepos.x<=0)
					{
						mousepos.x=0;
						break;
					}
					
					uint32 clicks=1; // can't get the # of clicks without a *lot* of extra work :(
					int64 time=(int64)real_time_clock();
					
					if(modifiers & B_SHIFT_KEY)
						mousepos.x--;
					else
					{
						mousepos.x-=10;
						if(mousepos.x<0)
							mousepos.x=0;
					}

					serverlink->SetOpCode(B_MOUSE_MOVED);
					serverlink->Attach(&time, sizeof(int64));
					serverlink->Attach(&mousepos.x,sizeof(float));
					serverlink->Attach(&mousepos.y,sizeof(float));
					serverlink->Attach(&servermods, sizeof(int32));
					serverlink->Attach(&buttons, sizeof(uint32));
					serverlink->Attach(&clicks, sizeof(uint32));
					serverlink->Flush();
					break;
				}
				case 0x63:	// right arrow
				{
					// Attach data:
					// 1) int64 - time of mouse click
					// 2) float - x coordinate of mouse click
					// 3) float - y coordinate of mouse click
					// 4) int32 - modifier keys down
					// 5) int32 - buttons down
					// 6) int32 - clicks
					
					
					if(mousepos.x>= (gcinfo.width-1))
					{
						mousepos.x=gcinfo.width-1;
						break;
					}
					
					uint32 clicks=1; // can't get the # of clicks without a *lot* of extra work :(
					int64 time=(int64)real_time_clock();
					
					if(modifiers & B_SHIFT_KEY)
						mousepos.x++;
					else
					{
						mousepos.x+=10;
						if(mousepos.x>gcinfo.width-1)
							mousepos.x=gcinfo.width-1;
					}

					serverlink->SetOpCode(B_MOUSE_MOVED);
					serverlink->Attach(&time, sizeof(int64));
					serverlink->Attach(&mousepos.x,sizeof(float));
					serverlink->Attach(&mousepos.y,sizeof(float));
					serverlink->Attach(&servermods, sizeof(int32));
					serverlink->Attach(&buttons, sizeof(uint32));
					serverlink->Attach(&clicks, sizeof(uint32));
					serverlink->Flush();
					break;
				}
#endif	// end server emu code
				default:
					break;
			}
		}
		case B_MODIFIERS_CHANGED:
		{
			int32 modifiers;
			if(msg->FindInt32("modifiers",&modifiers)==B_OK)
			{
#ifdef ENABLE_INPUT_SERVER_EMULATION

				uint32 clicks=1; // can't get the # of clicks without a *lot* of extra work :(
				int64 time=(int64)real_time_clock();
				
				// we need to be able to shift click & such, so we will construct
				// a new modifiers value which excludes our mouse click keys
				int32 servermods=0;
				servermods|=modifiers & B_RIGHT_COMMAND_KEY;
				servermods|=modifiers & B_RIGHT_OPTION_KEY;
				servermods|=modifiers & B_RIGHT_CONTROL_KEY;
				servermods|=modifiers & B_SHIFT_KEY;
				
				if(modifiers & B_LEFT_OPTION_KEY)
				{
					buttons=B_PRIMARY_MOUSE_BUTTON;
					
					serverlink->SetOpCode(B_MOUSE_DOWN);
					serverlink->Attach(&time, sizeof(int64));
					serverlink->Attach(&mousepos.x,sizeof(float));
					serverlink->Attach(&mousepos.y,sizeof(float));
					serverlink->Attach(&servermods, sizeof(uint32));
					serverlink->Attach(&buttons, sizeof(uint32));
					serverlink->Attach(&clicks, sizeof(uint32));
					serverlink->Flush();
				}
				else
					if(modifiers & B_LEFT_CONTROL_KEY)
					{
						buttons=B_SECONDARY_MOUSE_BUTTON;

						serverlink->SetOpCode(B_MOUSE_DOWN);
						serverlink->Attach(&time, sizeof(int64));
						serverlink->Attach(&mousepos.x,sizeof(float));
						serverlink->Attach(&mousepos.y,sizeof(float));
						serverlink->Attach(&servermods, sizeof(uint32));
						serverlink->Attach(&buttons, sizeof(uint32));
						serverlink->Attach(&clicks, sizeof(uint32));
						serverlink->Flush();
					}
					else
					{
						// well, we got this far so none of the buttons
						// are down. set our mouse buttons to up and if this
						// is a change, send a B_MOUSE_UP message
						if(buttons>0)
						{
							serverlink->SetOpCode(B_MOUSE_UP);
							serverlink->Attach(&time, sizeof(int64));
							serverlink->Attach(&mousepos.x,sizeof(float));
							serverlink->Attach(&mousepos.y,sizeof(float));
							serverlink->Attach(&servermods, sizeof(uint32));
							serverlink->Flush();
						}
						buttons=0;
					}
#endif	// end server emu code
			}
			break;
		}
		default:
			BWindowScreen::MessageReceived(msg);
	}
}

bool FrameBuffer::QuitRequested(void)
{
	port_id serverport=find_port(SERVER_PORT_NAME);

	if(serverport!=B_NAME_NOT_FOUND)
		write_port(serverport,B_QUIT_REQUESTED,NULL,0);

	return true;
}

ScreenDriver::ScreenDriver(void) : DisplayDriver()
{
	status_t st;
	fbuffer=new FrameBuffer("OBAppServer",B_8_BIT_640x480,&st,true);

	drawmode = B_OP_COPY;

	cursor=NULL;
	under_cursor=NULL;
	cursorframe.Set(0,0,0,0);
}

ScreenDriver::~ScreenDriver(void)
{
	if(cursor)
		delete cursor;
	if(under_cursor)
		delete under_cursor;
}

bool ScreenDriver::Initialize(void)
{
	fbuffer->Show();

	// wait 1 sec for the window to show...
	snooze(500000);

	// we start out without a cursor shown because otherwise we get glitches in the
	// upper left corner. init_desktop *always* sets a cursor, so this shouldn't be a problem
	return true;
}

void ScreenDriver::Shutdown(void)
{
	fbuffer->Lock();
	fbuffer->Quit();
}

void ScreenDriver::DrawBitmap(ServerBitmap *bitmap, BRect source, BRect dest, LayerData *d)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		// Scale bitmap here if source!=dest
	
		switch(fbuffer->gcinfo.bits_per_pixel)
		{	
			case 32:
			case 24:
			{
				// TODO: Implement
				printf("DrawBitmap: 32/24-bit unimplemented\n");
				break;
			}
			case 16:
			case 15:
			{
				// TODO: Implement
				printf("DrawBitmap: 16/15-bit unimplemented\n");
				break;
			}
			case 8:
			{
				// TODO: Implement
				printf("DrawBitmap: 8-bit unimplemented\n");
				break;
			}
			default:
			{
				break;
			}
		}
	}

	_Unlock();
}

// Ellipse code shamelessly stolen from the graphics library gd v2.0.1 and bolted on
// to support our API
void ScreenDriver::FillEllipse(BRect r, LayerData *ldata, int8 *pat)
{
	long d, b_sq, b_sq_4, b_sq_6;
	long a_sq, a_sq_4, a_sq_6;
	int x, y, switchem;
	long lsqrt (long);
	int pix, half, pstart;
	int32 thick = (int32)ldata->pensize;
	
	half = thick / 2;
	int32 w=int32(r.Width()/2),
		h=int32(r.Height()/2);
	int32 cx=(int32)r.left+w;
	int32 cy=(int32)r.top+h;
	
	d = 2 * (long) h *h + (long) w *w - 2 * (long) w *w * h;
	b_sq = (long) h *h;
	b_sq_4 = 4 * (long) h *h;
	b_sq_6 = 6 * (long) h *h;
	a_sq = (long) w *w;
	a_sq_4 = 4 * (long) w *w;
	a_sq_6 = 6 * (long) w *w;
	
	x = 0;
	y = -h;
//	switchem = a_sq / lsqrt (a_sq + b_sq);
	switchem = a_sq / (int32)sqrt(a_sq + b_sq);

	while (x <= switchem)
	{
		pstart = y - half;
		for (pix = pstart; pix < pstart + thick; pix++)
		{
			Line( BPoint(cx - x, cy + pix), BPoint(cx + x, cy + pix), ldata, solidhigh);
			Line( BPoint(cx - x, cy - pix), BPoint(cx + x, cy - pix), ldata, solidhigh);
		}
		if (d < 0)
			d += b_sq_4 * x++ + b_sq_6;
		else
			d += b_sq_4 * x++ + b_sq_6 + a_sq_4 * (++y);
	}
	
	/* Middlesplat!
	** Go a little further if the thickness is not nominal...
	*/
	if (thick > 1)
	{
		int xp = x;
		int yp = y;
		int dp = d;
		int thick2 = thick + 2;
		int half2 = half + 1;
		
		while (xp <= switchem + half)
		{
			pstart = yp - half2;
			for (pix = pstart; pix < pstart + thick2; pix++)
			{
				Line( BPoint(cx - xp, cy + pix), BPoint(cx + xp, cy + pix), ldata, solidhigh);
				Line( BPoint(cx - xp, cy - pix), BPoint(cx + xp, cy - pix), ldata, solidhigh);
			}
			if (dp < 0)
				dp += b_sq_4 * xp++ + b_sq_6;
			else
				dp += b_sq_4 * xp++ + b_sq_6 + a_sq_4 * (++yp);
		}
	}
	
	d += -2 * (long) b_sq + 2 * (long) a_sq - 2 * (long) b_sq *(x - 1) + 2 * (long) a_sq *(y - 1);
	
	while (y <= 0)
	{
		pstart = x - half;
		for (pix = pstart; pix < pstart + thick; pix++)
		{
			Line( BPoint(cx - pix, cy + y), BPoint(cx + pix, cy + y), ldata, solidhigh);
			Line( BPoint(cx - pix, cy - y), BPoint(cx + pix, cy - y), ldata, solidhigh);
		}
		
		if (d < 0)
			d += a_sq_4 * y++ + a_sq_6 + b_sq_4 * (++x);
		else
			d += a_sq_4 * y++ + a_sq_6;
	}
}

void ScreenDriver::FillRect(BRect r, LayerData *d, int8 *pat)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
	//	int32 width=rect.IntegerWidth();
		for(int32 i=(int32)r.top;i<=r.bottom;i++)
	//		HLine(fbuffer->gcinfo,(int32)rect.left,i,width,col);
			Line(BPoint(r.left,i),BPoint(r.right,i),d,pat);
	}
	_Unlock();
}

void ScreenDriver::FillRoundRect(BRect r, float xrad, float yrad, LayerData *d, int8 *pat)
{
	FillRect(r,d,pat);
}

void ScreenDriver::FillTriangle(BPoint *pts, BRect r, LayerData *d, int8 *pat)
{
	if(!pts || !d || !pat)
		return;

	_Lock();
	if(fbuffer->IsConnected())
	{
		BPoint first, second, third;

		// Sort points according to their y values
		if(pts[0].y < pts[1].y)
		{
			first=pts[0];
			second=pts[1];
		}
		else
		{
			first=pts[1];
			second=pts[0];
		}
		
		if(second.y<pts[2].y)
		{
			third=pts[2];
		}
		else
		{
			// second is lower than "third", so we must ensure that this third point
			// isn't higher than our first point
			third=second;
			if(first.y<pts[2].y)
				second=pts[2];
			else
			{
				second=first;
				first=pts[2];
			}
		}
		
		// Now that the points are sorted, check to see if they all have the same
		// y value
		if(first.y==second.y && second.y==third.y)
		{
			BPoint start,end;
			start.y=first.y;
			end.y=first.y;
			start.x=MIN(first.x,MIN(second.x,third.x));
			end.x=MAX(first.x,MAX(second.x,third.x));
			Line(start,end, d, pat);
			_Unlock();
			return;
		}

		int32 i;

		// Special case #1: first and second in the same row
		if(first.y==second.y)
		{
			LineCalc lineA(first, third);
			LineCalc lineB(second, third);
			
			Line(first, second,d,pat);
			for(i=int32(first.y+1);i<third.y;i++)
				Line( BPoint(lineA.GetX(i),i), BPoint(lineB.GetX(i),i),d,pat);
			_Unlock();
			return;
		}
		
		// Special case #2: second and third in the same row
		if(second.y==third.y)
		{
			LineCalc lineA(first, second);
			LineCalc lineB(first, third);
			
			Line(second, third,d,pat);
			for(i=int32(first.y+1);i<third.y;i++)
				Line( BPoint(lineA.GetX(i),i), BPoint(lineB.GetX(i),i),d,pat);
			_Unlock();
			return;
		}
		
		// Normal case.
		// Calculate the y deltas for the two lines and we set the maximum for the
		// first loop to the lesser of the two so that we can change lines.
		int32 dy1=int32(second.y-first.y),
			dy2=int32(third.y-first.y),
			max;
		max=int32(first.y+MIN(dy1,dy2));
		
		LineCalc lineA(first, second);
		LineCalc lineB(first, third);
		LineCalc lineC(second, third);
		
		for(i=int32(first.y+1);i<max;i++)
			Line( BPoint(lineA.GetX(i),i), BPoint(lineB.GetX(i),i),d,pat);

		for(i=max; i<third.y; i++)
			Line( BPoint(lineC.GetX(i),i), BPoint(lineB.GetX(i),i),d,pat);
		
	}
	_Unlock();
}

void ScreenDriver::SetThickPixel(int x, int y, int thick, RGBColor col)
{
	switch(fbuffer->gcinfo.bits_per_pixel)
	{
		case 32:
		case 24:
			SetThickPixel32(x,y,thick,col.GetColor32());
			break;
		case 16:
		case 15:
			SetThickPixel16(x,y,thick,col.GetColor16());
			break;
		case 8:
			SetThickPixel8(x,y,thick,col.GetColor8());
			break;
		default:
			printf("Unknown pixel depth %d in SetThickPixel\n",fbuffer->gcinfo.bits_per_pixel);
			break;
	}
}

void ScreenDriver::SetThickPixel32(int x, int y, int thick, rgb_color col)
{
	// Code courtesy of YNOP's SecondDriver
	union
	{
		uint8 bytes[4];
		uint32 word;
	}c1;
	
	c1.bytes[0]=col.blue; 
	c1.bytes[1]=col.green; 
	c1.bytes[2]=col.red; 
	c1.bytes[3]=col.alpha; 

	/*
	uint32 *bits=(uint32*)fbuffer->gcinfo.frame_buffer;
	*(bits + x + (y*fbuffer->gcinfo.width))=c1.word;
	*/
	uint32 *bits=(uint32*)fbuffer->gcinfo.frame_buffer+(x-thick/2)+(y-thick/2)*fbuffer->gcinfo.width;
	int i,j;
	for (i=0; i<thick; i++)
	{
		for (j=0; j<thick; j++)
		{
			*(bits+j)=c1.word;
		}
		bits += fbuffer->gcinfo.width;
	}
}

void ScreenDriver::SetThickPixel16(int x, int y, int thick, uint16 col)
{
// TODO: Implement
printf("SetThickPixel16 unimplemented\n");

}

void ScreenDriver::SetThickPixel8(int x, int y, int thick, uint8 col)
{
	// When the DisplayDriver API changes, we'll use the uint8 highcolor. Until then,
	// we'll use *pattern
  /*
	uint8 *bits=(uint8*)fbuffer->gcinfo.frame_buffer;
	*(bits + x + (y*fbuffer->gcinfo.bytes_per_row))=col;
	*/

	uint8 *bits=(uint8*)fbuffer->gcinfo.frame_buffer+(x-thick/2)+(y-thick/2)*fbuffer->gcinfo.bytes_per_row;
	int i,j;
	for (i=0; i<thick; i++)
	{
		for (j=0; j<thick; j++)
		{
			*(bits+j)=col;
		}
		bits += fbuffer->gcinfo.bytes_per_row;
	}
}

void ScreenDriver::SetPixel(int x, int y, RGBColor col)
{
	switch(fbuffer->gcinfo.bits_per_pixel)
	{
		case 32:
		case 24:
			SetPixel32(x,y,col.GetColor32());
			break;
		case 16:
		case 15:
			SetPixel16(x,y,col.GetColor16());
			break;
		case 8:
			SetPixel8(x,y,col.GetColor8());
			break;
		default:
			break;
	}
}

void ScreenDriver::SetPixel32(int x, int y, rgb_color col)
{
	// Code courtesy of YNOP's SecondDriver
	union
	{
		uint8 bytes[4];
		uint32 word;
	}c1;
	
	c1.bytes[0]=col.blue; 
	c1.bytes[1]=col.green; 
	c1.bytes[2]=col.red; 
	c1.bytes[3]=col.alpha; 

	uint32 *bits=(uint32*)fbuffer->gcinfo.frame_buffer;
	*(bits + x + (y*fbuffer->gcinfo.width))=c1.word;
}

void ScreenDriver::SetPixel16(int x, int y, uint16 col)
{
// TODO: Implement
printf("SetPixel16 unimplemented\n");

}

void ScreenDriver::SetPixel8(int x, int y, uint8 col)
{
	// When the DisplayDriver API changes, we'll use the uint8 highcolor. Until then,
	// we'll use *pattern
	uint8 *bits=(uint8*)fbuffer->gcinfo.frame_buffer;
	*(bits + x + (y*fbuffer->gcinfo.bytes_per_row))=col;

}

void ScreenDriver::SetMode(int32 space)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		fbuffer->SetSpace(space);
		
		// We have changed the frame buffer info, so update the cached info
		graphics_card_info *info=fbuffer->CardInfo();
		fbuffer->gcinfo=*info;
		
		// clear the frame buffer. Otherwise, we'll have garbage in it
		LayerData d;
		d.highcolor.SetColor(80,85,152);
		for(int32 i=0; i<info->height; i++)
		{
			Line(BPoint(0,i),BPoint(info->width-1,i),&d,solidhigh);
		}
	}
	_Unlock();
}


// Currently does not support pattern
void ScreenDriver::StrokeArc(BRect r, float angle, float span, LayerData *d, int8 *pat)
{
	float xc = (r.left+r.right)/2;
	float yc = (r.top+r.bottom)/2;
	float rx = r.Width()/2;
	float ry = r.Height()/2;
	int Rx2 = ROUND(rx*rx);
	int Ry2 = ROUND(ry*ry);
	int twoRx2 = 2*Rx2;
	int twoRy2 = 2*Ry2;
	int p;
	int x=0;
	int y = (int)ry;
	int px = 0;
	int py = twoRx2 * y;
	int startx, endx;
	int startQuad, endQuad;
	bool useQuad1, useQuad2, useQuad3, useQuad4;
	bool shortspan = false;
	int thick = (int)d->pensize;

	// Watch out for bozos giving us whacko spans
	if ( (span >= 360) || (span <= -360) )
	{
	  StrokeEllipse(r,d,pat);
	  return;
	}

	if ( span > 0 )
	{
		startQuad = (int)(angle/90)%4+1;
		endQuad = (int)((angle+span)/90)%4+1;
		startx = ROUND(.5*r.Width()*fabs(cos(angle*M_PI/180)));
		endx = ROUND(.5*r.Width()*fabs(cos((angle+span)*M_PI/180)));
	}
	else
	{
		endQuad = (int)(angle/90)%4+1;
		startQuad = (int)((angle+span)/90)%4+1;
		endx = ROUND(.5*r.Width()*fabs(cos(angle*M_PI/180)));
		startx = ROUND(.5*r.Width()*fabs(cos((angle+span)*M_PI/180)));
	}

	if ( startQuad != endQuad )
	{
		useQuad1 = (endQuad > 1) && (startQuad > endQuad);
		useQuad2 = ((startQuad == 1) && (endQuad > 2)) || ((startQuad > endQuad) && (endQuad > 2));
		useQuad3 = ((startQuad < 3) && (endQuad == 4)) || ((startQuad < 3) && (endQuad < startQuad));
		useQuad4 = (startQuad < 4) && (startQuad > endQuad);
	}
	else
	{
		if ( (span < 90) && (span > -90) )
		{
			useQuad1 = false;
			useQuad2 = false;
			useQuad3 = false;
			useQuad4 = false;
			shortspan = true;
		}
		else
		{
			useQuad1 = (startQuad != 1);
			useQuad2 = (startQuad != 2);
			useQuad3 = (startQuad != 3);
			useQuad4 = (startQuad != 4);
		}
	}

	if ( useQuad1 || 
	     (!shortspan && (((startQuad == 1) && (x <= startx)) || ((endQuad == 1) && (x >= endx)))) || 
	     (shortspan && (startQuad == 1) && (x <= startx) && (x >= endx)) ) 
		SetThickPixel(xc+x,yc-y,thick,d->highcolor);
	if ( useQuad2 || 
	     (!shortspan && (((startQuad == 2) && (x >= startx)) || ((endQuad == 2) && (x <= endx)))) || 
	     (shortspan && (startQuad == 2) && (x >= startx) && (x <= endx)) ) 
		SetThickPixel(xc-x,yc-y,thick,d->highcolor);
	if ( useQuad3 || 
	     (!shortspan && (((startQuad == 3) && (x <= startx)) || ((endQuad == 3) && (x >= endx)))) || 
	     (shortspan && (startQuad == 3) && (x <= startx) && (x >= endx)) ) 
		SetThickPixel(xc-x,yc+y,thick,d->highcolor);
	if ( useQuad4 || 
	     (!shortspan && (((startQuad == 4) && (x >= startx)) || ((endQuad == 4) && (x <= endx)))) || 
	     (shortspan && (startQuad == 4) && (x >= startx) && (x <= endx)) ) 
		SetThickPixel(xc+x,yc+y,thick,d->highcolor);

	p = ROUND (Ry2 - (Rx2 * ry) + (.25 * Rx2));
	while (px < py)
	{
		x++;
		px += twoRy2;
		if ( p < 0 )
			p += Ry2 + px;
		else
		{
			y--;
			py -= twoRx2;
			p += Ry2 + px - py;
		}

		if ( useQuad1 || 
		     (!shortspan && (((startQuad == 1) && (x <= startx)) || ((endQuad == 1) && (x >= endx)))) || 
		     (shortspan && (startQuad == 1) && (x <= startx) && (x >= endx)) ) 
			SetThickPixel(xc+x,yc-y,thick,d->highcolor);
		if ( useQuad2 || 
		     (!shortspan && (((startQuad == 2) && (x >= startx)) || ((endQuad == 2) && (x <= endx)))) || 
		     (shortspan && (startQuad == 2) && (x >= startx) && (x <= endx)) ) 
			SetThickPixel(xc-x,yc-y,thick,d->highcolor);
		if ( useQuad3 || 
		     (!shortspan && (((startQuad == 3) && (x <= startx)) || ((endQuad == 3) && (x >= endx)))) || 
		     (shortspan && (startQuad == 3) && (x <= startx) && (x >= endx)) ) 
			SetThickPixel(xc-x,yc+y,thick,d->highcolor);
		if ( useQuad4 || 
		     (!shortspan && (((startQuad == 4) && (x >= startx)) || ((endQuad == 4) && (x <= endx)))) || 
		     (shortspan && (startQuad == 4) && (x >= startx) && (x <= endx)) ) 
			SetThickPixel(xc+x,yc+y,thick,d->highcolor);
	}

	p = ROUND(Ry2*(x+.5)*(x+.5) + Rx2*(y-1)*(y-1) - Rx2*Ry2);
	while (y>0)
	{
		y--;
		py -= twoRx2;
		if (p>0)
			p += Rx2 - py;
		else
		{
			x++;
			px += twoRy2;
			p += Rx2 - py +px;
		}

		if ( useQuad1 || 
		     (!shortspan && (((startQuad == 1) && (x <= startx)) || ((endQuad == 1) && (x >= endx)))) || 
		     (shortspan && (startQuad == 1) && (x <= startx) && (x >= endx)) ) 
			SetThickPixel(xc+x,yc-y,thick,d->highcolor);
		if ( useQuad2 || 
		     (!shortspan && (((startQuad == 2) && (x >= startx)) || ((endQuad == 2) && (x <= endx)))) || 
		     (shortspan && (startQuad == 2) && (x >= startx) && (x <= endx)) ) 
			SetThickPixel(xc-x,yc-y,thick,d->highcolor);
		if ( useQuad3 || 
		     (!shortspan && (((startQuad == 3) && (x <= startx)) || ((endQuad == 3) && (x >= endx)))) || 
		     (shortspan && (startQuad == 3) && (x <= startx) && (x >= endx)) ) 
			SetThickPixel(xc-x,yc+y,thick,d->highcolor);
		if ( useQuad4 || 
		     (!shortspan && (((startQuad == 4) && (x >= startx)) || ((endQuad == 4) && (x <= endx)))) || 
		     (shortspan && (startQuad == 4) && (x >= startx) && (x <= endx)) ) 
			SetThickPixel(xc+x,yc+y,thick,d->highcolor);
	}
}

// Currently does not support pattern
void ScreenDriver::StrokeBezier(BPoint *pts, LayerData *d, int8 *pat)
{
	double Ax, Bx, Cx, Dx;
	double Ay, By, Cy, Dy;
	int x, y;
	int lastx=-1, lasty=-1;
	double t;
	double dt = .001;
	double dt2, dt3;
	double X, Y, dx, ddx, dddx, dy, ddy, dddy;

	Ax = -pts[0].x + 3*pts[1].x - 3*pts[2].x + pts[3].x;
	Bx = 3*pts[0].x - 6*pts[1].x + 3*pts[2].x;
	Cx = -3*pts[0].x + 3*pts[1].x;
	Dx = pts[0].x;

	Ay = -pts[0].y + 3*pts[1].y - 3*pts[2].y + pts[3].y;
	By = 3*pts[0].y - 6*pts[1].y + 3*pts[2].y;
	Cy = -3*pts[0].y + 3*pts[1].y;
	Dy = pts[0].y;
	
	dt2 = dt * dt;
	dt3 = dt2 * dt;
	X = Dx;
	dx = Ax*dt3 + Bx*dt2 + Cx*dt;
	ddx = 6*Ax*dt3 + 2*Bx*dt2;
	dddx = 6*Ax*dt3;
	Y = Dy;
	dy = Ay*dt3 + By*dt2 + Cy*dt;
	ddy = 6*Ay*dt3 + 2*By*dt2;
	dddy = 6*Ay*dt3;

	lastx = -1;
	lasty = -1;

	for (t=0; t<=1; t+=dt)
	{
		x = ROUND(X);
		y = ROUND(Y);
		if ( (x!=lastx) || (y!=lasty) )
			SetThickPixel(x,y,d->pensize,d->highcolor);
		lastx = x;
		lasty = y;

		X += dx;
		dx += ddx;
		ddx += dddx;
		Y += dy;
		dy += ddy;
		ddy += dddy;
	}
}

// Ellipse code shamelessly stolen from the graphics library gd v2.0.1 and bolted on
// to support our API
void ScreenDriver::StrokeEllipse(BRect r, LayerData *ldata, int8 *pat)
{
	long d, b_sq, b_sq_4, b_sq_6;
	long a_sq, a_sq_4, a_sq_6;
	int x, y, switchem;
	long lsqrt (long);
	int pix, half, pstart;
	int32 thick = (int32)ldata->pensize;
	
	half = thick / 2;
	int32 w=int32(r.Width()/2),
		h=int32(r.Height()/2);
	int32 cx=(int32)r.left+w;
	int32 cy=(int32)r.top+h;
	
	d = 2 * (long) h *h + (long) w *w - 2 * (long) w *w * h;
	b_sq = (long) h *h;
	b_sq_4 = 4 * (long) h *h;
	b_sq_6 = 6 * (long) h *h;
	a_sq = (long) w *w;
	a_sq_4 = 4 * (long) w *w;
	a_sq_6 = 6 * (long) w *w;
	
	x = 0;
	y = -h;
//	switchem = a_sq / lsqrt (a_sq + b_sq);
	switchem = a_sq / (int32)sqrt(a_sq + b_sq);

	while (x <= switchem)
	{
		pstart = y - half;
		for (pix = pstart; pix < pstart + thick; pix++)
		{
			SetPixel(cx + x, cy + pix, ldata->highcolor);
			SetPixel(cx - x, cy + pix, ldata->highcolor);
			SetPixel(cx + x, cy - pix, ldata->highcolor);
			SetPixel(cx - x, cy - pix, ldata->highcolor);
		}
		if (d < 0)
			d += b_sq_4 * x++ + b_sq_6;
		else
			d += b_sq_4 * x++ + b_sq_6 + a_sq_4 * (++y);
	}
	
	/* Middlesplat!
	** Go a little further if the thickness is not nominal...
	*/
	if (thick > 1)
	{
		int xp = x;
		int yp = y;
		int dp = d;
		int thick2 = thick + 2;
		int half2 = half + 1;
		
		while (xp <= switchem + half)
		{
			pstart = yp - half2;
			for (pix = pstart; pix < pstart + thick2; pix++)
			{
				SetPixel(cx + xp, cy + pix, ldata->highcolor);
				SetPixel(cx - xp, cy + pix, ldata->highcolor);
				SetPixel(cx + xp, cy - pix, ldata->highcolor);
				SetPixel(cx - xp, cy - pix, ldata->highcolor);
			}
			if (dp < 0)
				dp += b_sq_4 * xp++ + b_sq_6;
			else
				dp += b_sq_4 * xp++ + b_sq_6 + a_sq_4 * (++yp);
		}
	}
	
	d += -2 * (long) b_sq + 2 * (long) a_sq - 2 * (long) b_sq *(x - 1) + 2 * (long) a_sq *(y - 1);
	
	while (y <= 0)
	{
		pstart = x - half;
		for (pix = pstart; pix < pstart + thick; pix++)
		{
			SetPixel (cx + pix, cy + y, ldata->highcolor);
			SetPixel (cx - pix, cy + y, ldata->highcolor);
			SetPixel (cx + pix, cy - y, ldata->highcolor);
			SetPixel (cx - pix, cy - y, ldata->highcolor);
		}
		
		if (d < 0)
			d += a_sq_4 * y++ + a_sq_6 + b_sq_4 * (++x);
		else
			d += a_sq_4 * y++ + a_sq_6;
	}

}

void ScreenDriver::StrokeLine(BPoint start, BPoint end, LayerData *d, int8 *pat)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		// Courtesy YNOP's SecondDriver with minor changes by DW
		int oct=0;
		int xoff=(int32)end.x;
		int yoff=(int32)end.y; 
		int32 x2=(int32)start.x-xoff;
		int32 y2=(int32)start.y-yoff; 
		int32 x1=0;
		int32 y1=0;
		if(y2<0){ y2=-y2; oct+=4; }//bit2=1
		if(x2<0){ x2=-x2; oct+=2;}//bit1=1
		if(x2<y2){ int t=x2; x2=y2; y2=t; oct+=1;}//bit0=1
		int x=x1,
			y=y1,
			sum=x2-x1,
			Dx=2*(x2-x1),
			Dy=2*(y2-y1);
		for(int i=0; i <= x2-x1; i++)
		{
			switch(oct)
			{
				case 0:SetPixel(( x)+xoff,( y)+yoff,d->highcolor);break;
				case 1:SetPixel(( y)+xoff,( x)+yoff,d->highcolor);break;
	 			case 3:SetPixel((-y)+xoff,( x)+yoff,d->highcolor);break;
				case 2:SetPixel((-x)+xoff,( y)+yoff,d->highcolor);break;
				case 6:SetPixel((-x)+xoff,(-y)+yoff,d->highcolor);break;
				case 7:SetPixel((-y)+xoff,(-x)+yoff,d->highcolor);break;
				case 5:SetPixel(( y)+xoff,(-x)+yoff,d->highcolor);break;
				case 4:SetPixel(( x)+xoff,(-y)+yoff,d->highcolor);break;
			}
			x++;
			sum-=Dy;
			if(sum < 0)
			{
				y++;
				sum += Dx;
			}
		}
	}
	_Unlock();
}

void ScreenDriver::StrokePolygon(BPoint *ptlist, int32 numpts, BRect rect, LayerData *d, int8 *pat, bool is_closed=true)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		for(int32 i=0; i<(numpts-1); i++)
			Line(ptlist[i],ptlist[i+1],d,pat);
	
		if(is_closed)
			Line(ptlist[numpts-1],ptlist[0],d,pat);
	}
	_Unlock();
}

void ScreenDriver::StrokeRect(BRect r, LayerData *d, int8 *pat)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		Line(r.LeftTop(),r.RightTop(),d,pat);
		Line(r.RightTop(),r.RightBottom(),d,pat);
		Line(r.RightBottom(),r.LeftBottom(),d,pat);
		Line(r.LeftTop(),r.LeftBottom(),d,pat);
	}
	_Unlock();
}

void ScreenDriver::StrokeRoundRect(BRect r, float xrad, float yrad, LayerData *d, int8 *pat)
{
// TODO: Implement
printf("ScreenDriver::StrokeRoundRect( (%f,%f,%f,%f), %llx) ---->Unimplemented<----\n",r.left,r.top,
	r.right,r.bottom,*((uint64*)pat));
	StrokeRect(r,d,pat);
}

void ScreenDriver::StrokeTriangle(BPoint *pts, BRect r, LayerData *d, int8 *pat)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		Line(pts[0],pts[1],d,pat);
		Line(pts[1],pts[2],d,pat);
		Line(pts[2],pts[0],d,pat);
	}
	_Unlock();
}

void ScreenDriver::SetPixelPattern(int x, int y, uint8 *pattern, uint8 patternindex)
{
	// This function is designed to add pattern support to this thing. Should be
	// inlined later to add speed lost in the multiple function calls.
	if(patternindex>32)
		return;

	if(fbuffer->IsConnected())
	{
//		uint64 *p64=(uint64*)pattern;

		// check for transparency in mask. If transparent, we can quit here
		
//		bool transparent_bit=
//			( *p64 & ~((uint64)2 << (32-patternindex)))?true:false;

//		bool highcolor_bit=
//			( *p64 & ~((uint64)2 << (64-patternindex)))?true:false;
			
		switch(fbuffer->gcinfo.bits_per_pixel)
		{	
			case 32:
			case 24:
			{
				
				break;
			}
			case 16:
			case 15:
			{
				break;
			}
			case 8:
			{
				break;
			}
			default:
			{
				break;
			}
		}
	}
}

void ScreenDriver::Line(BPoint start, BPoint end, LayerData *d, int8 *pat)
{
	// Internal function which is called from within other functions
	
	// Courtesy YNOP's SecondDriver with minor changes by DW
	int oct=0;
	int xoff=(int32)end.x;
	int yoff=(int32)end.y; 
	int32 x2=(int32)start.x-xoff;
	int32 y2=(int32)start.y-yoff; 
	int32 x1=0;
	int32 y1=0;
	if(y2<0){ y2=-y2; oct+=4; }//bit2=1
	if(x2<0){ x2=-x2; oct+=2;}//bit1=1
	if(x2<y2){ int t=x2; x2=y2; y2=t; oct+=1;}//bit0=1
	int x=x1,
		y=y1,
		sum=x2-x1,
		Dx=2*(x2-x1),
		Dy=2*(y2-y1);
	for(int i=0; i <= x2-x1; i++)
	{
		switch(oct)
		{
			case 0:SetPixel(( x)+xoff,( y)+yoff,d->highcolor);break;
			case 1:SetPixel(( y)+xoff,( x)+yoff,d->highcolor);break;
 			case 3:SetPixel((-y)+xoff,( x)+yoff,d->highcolor);break;
			case 2:SetPixel((-x)+xoff,( y)+yoff,d->highcolor);break;
			case 6:SetPixel((-x)+xoff,(-y)+yoff,d->highcolor);break;
			case 7:SetPixel((-y)+xoff,(-x)+yoff,d->highcolor);break;
			case 5:SetPixel(( y)+xoff,(-x)+yoff,d->highcolor);break;
			case 4:SetPixel(( x)+xoff,(-y)+yoff,d->highcolor);break;
		}
		x++;
		sum-=Dy;
		if(sum < 0)
		{
			y++;
			sum += Dx;
		}
	}
}

void ScreenDriver::HideCursor(void)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		if(!IsCursorHidden())
			BlitBitmap(under_cursor,under_cursor->Bounds(),cursorframe, B_OP_COPY);
		DisplayDriver::HideCursor();

	}
	_Unlock();
}

void ScreenDriver::MoveCursorTo(float x, float y)
{
	_Lock();
	if(!IsCursorHidden())
		BlitBitmap(under_cursor,under_cursor->Bounds(),cursorframe, B_OP_COPY);

	cursorframe.OffsetTo(x,y);
	ExtractToBitmap(under_cursor,under_cursor->Bounds(),cursorframe);
	
	if(!IsCursorHidden())
		BlitBitmap(cursor,cursor->Bounds(),cursorframe, B_OP_OVER);
	
	_Unlock();
}

void ScreenDriver::ShowCursor(void)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		if(IsCursorHidden())
			BlitBitmap(cursor,cursor->Bounds(),cursorframe, B_OP_OVER);
		DisplayDriver::ShowCursor();
	}
	_Unlock();
}

void ScreenDriver::ObscureCursor(void)
{
	_Lock();
	if(!IsCursorHidden() && fbuffer->IsConnected())
		BlitBitmap(under_cursor,under_cursor->Bounds(),cursorframe, B_OP_COPY);
	DisplayDriver::ObscureCursor();
	_Unlock();
}

void ScreenDriver::SetCursor(ServerCursor *csr)
{
	if(!csr)
		return;
		
	_Lock();

	// erase old if visible
	if(!IsCursorHidden() && under_cursor)
		BlitBitmap(under_cursor,under_cursor->Bounds(),cursorframe, B_OP_COPY);

	if(cursor)
		delete cursor;
	if(under_cursor)
		delete under_cursor;
	
	cursor=new ServerCursor(csr);
	under_cursor=new ServerCursor(csr);
	
	cursorframe.right=cursorframe.left+csr->Bounds().Width();
	cursorframe.bottom=cursorframe.top+csr->Bounds().Height();
	
	ExtractToBitmap(under_cursor,under_cursor->Bounds(),cursorframe);
	
	if(!IsCursorHidden())
		BlitBitmap(cursor,cursor->Bounds(),cursorframe, B_OP_OVER);
	
	_Unlock();
}

void ScreenDriver::HLine(int32 x1, int32 x2, int32 y, RGBColor color)
{
	// Internal function called from others in the driver
	
	// TODO: Implement and substitute Line() calls with HLine calls as appropriate
	// elsewhere in the driver
	
	switch(fbuffer->gcinfo.bits_per_pixel)
	{
		case 32:
		case 24:
			break;
		case 16:
		case 15:
			break;
		default:
			break;
	}
}

void HLine_32Bit(graphics_card_info i, uint16 x, uint16 y, uint16 length, rgb_color col)
{
// TODO: Finish
printf("HLine32() Unfinished\n");
	uint32 c=0,*pcolor,bytes;
	
	// apparently width=bytes per row
	uint32 bpr=i.width;
	
	// ARGB order
	c|=col.alpha * 0x01000000;
	c|=col.red * 0x010000;
	c|=col.green * 0x0100;
	c|=col.blue;

	bytes=(uint32(x+length)>bpr)?length-((x+length)-bpr):length;

	pcolor=(uint32*)i.frame_buffer;
	pcolor+=(y*bpr)+(x*4);
	for(int32 i=0;i<length;i++)
		pcolor[i]=c;
}

void HLine_16Bit(graphics_card_info i, uint16 x, uint16 y, uint16 length, uint16 col)
{
// TODO: Implement
printf("HLine16() Unimplemented\n");
}

void HLine_8Bit(graphics_card_info i, uint16 x, uint16 y, uint16 length, uint8 col)
{
	size_t bytes;
	uint32 bpr=i.width;
	if( (bpr%2)!=0 )
		bpr++;

	uint8 *pcolor=(uint8*)i.frame_buffer;
	
	pcolor+=(y*bpr)+x;

	bytes=(uint32(x+length)>bpr)?length-((x+length)-bpr):length;

	memset(pcolor,col,bytes);
}

// This function is intended to eventually take care of most of the heavy lifting for
// DrawBitmap in 32-bit mode, with others coming later. Right now, it is *just* used for
// the 
void ScreenDriver::BlitBitmap(ServerBitmap *sourcebmp,BRect sourcerect, BRect destrect, drawing_mode mode=B_OP_COPY)
{
	// Another internal function called from other functions.
	
	if(!sourcebmp)
		return;

	if(sourcebmp->BitsPerPixel() != fbuffer->gcinfo.bits_per_pixel)
		return;

	uint8 colorspace_size=sourcebmp->BitsPerPixel()/8;
	// First, clip source rect to destination
	if(sourcerect.Width() > destrect.Width())
		sourcerect.right=sourcerect.left+destrect.Width();
	

	if(sourcerect.Height() > destrect.Height())
		sourcerect.bottom=sourcerect.top+destrect.Height();
	

	// Second, check rectangle bounds against their own bitmaps
	BRect work_rect;

	work_rect.Set(	sourcebmp->Bounds().left,
					sourcebmp->Bounds().top,
					sourcebmp->Bounds().right,
					sourcebmp->Bounds().bottom	);
	if( !(work_rect.Contains(sourcerect)) )
	{	// something in selection must be clipped
		if(sourcerect.left < 0)
			sourcerect.left = 0;
		if(sourcerect.right > work_rect.right)
			sourcerect.right = work_rect.right;
		if(sourcerect.top < 0)
			sourcerect.top = 0;
		if(sourcerect.bottom > work_rect.bottom)
			sourcerect.bottom = work_rect.bottom;
	}

	work_rect.Set(	0,0,fbuffer->gcinfo.width-1,fbuffer->gcinfo.height-1);

	if( !(work_rect.Contains(destrect)) )
	{	// something in selection must be clipped
		if(destrect.left < 0)
			destrect.left = 0;
		if(destrect.right > work_rect.right)
			destrect.right = work_rect.right;
		if(destrect.top < 0)
			destrect.top = 0;
		if(destrect.bottom > work_rect.bottom)
			destrect.bottom = work_rect.bottom;
	}

	// Set pointers to the actual data
	uint8 *src_bits  = (uint8*) sourcebmp->Bits();	
	uint8 *dest_bits = (uint8*) fbuffer->gcinfo.frame_buffer;

	// Get row widths for offset looping
	uint32 src_width  = uint32 (sourcebmp->BytesPerRow());
	uint32 dest_width = uint32 (fbuffer->gcinfo.bytes_per_row);

	// Offset bitmap pointers to proper spot in each bitmap
	src_bits += uint32 ( (sourcerect.top  * src_width)  + (sourcerect.left  * colorspace_size) );
	dest_bits += uint32 ( (destrect.top * dest_width) + (destrect.left * colorspace_size) );

	uint32 line_length = uint32 ((destrect.right - destrect.left+1)*colorspace_size);
	uint32 lines = uint32 (destrect.bottom-destrect.top+1);

	switch(mode)
	{
		case B_OP_OVER:
		{
			uint32 srow_pixels=src_width>>2;
			uint8 *srow_index, *drow_index;
			
			
			// This could later be optimized to use uint32's for faster copying
			for (uint32 pos_y=0; pos_y!=lines; pos_y++)
			{
				
				srow_index=src_bits;
				drow_index=dest_bits;
				
				for(uint32 pos_x=0; pos_x!=srow_pixels;pos_x++)
				{
					// 32-bit RGBA32 mode byte order is BGRA
					if(srow_index[3]>127)
					{
						*drow_index=*srow_index; drow_index++; srow_index++;
						*drow_index=*srow_index; drow_index++; srow_index++;
						*drow_index=*srow_index; drow_index++; srow_index++;
						// we don't copy the alpha channel
						drow_index++; srow_index++;
					}
					else
					{
						srow_index+=4;
						drow_index+=4;
					}
				}
		
				// Increment offsets
		   		src_bits += src_width;
		   		dest_bits += dest_width;
			}
			break;
		}
		default:	// B_OP_COPY
		{
			for (uint32 pos_y = 0; pos_y != lines; pos_y++)
			{
				memcpy(dest_bits,src_bits,line_length);
		
				// Increment offsets
		   		src_bits += src_width;
		   		dest_bits += dest_width;
			}
			break;
		}
	}
}

void ScreenDriver::ExtractToBitmap(ServerBitmap *destbmp,BRect destrect, BRect sourcerect)
{
	// Another internal function called from other functions. Extracts data from
	// the framebuffer to a target ServerBitmap

	if(!destbmp)
		return;

	if(destbmp->BitsPerPixel() != fbuffer->gcinfo.bits_per_pixel)
		return;

	uint8 colorspace_size=destbmp->BitsPerPixel()/8;
	// First, clip source rect to destination
	if(sourcerect.Width() > destrect.Width())
		sourcerect.right=sourcerect.left+destrect.Width();
	

	if(sourcerect.Height() > destrect.Height())
		sourcerect.bottom=sourcerect.top+destrect.Height();
	

	// Second, check rectangle bounds against their own bitmaps
	BRect work_rect;

	work_rect.Set(	destbmp->Bounds().left,
					destbmp->Bounds().top,
					destbmp->Bounds().right,
					destbmp->Bounds().bottom	);
	if( !(work_rect.Contains(destrect)) )
	{	// something in selection must be clipped
		if(destrect.left < 0)
			destrect.left = 0;
		if(destrect.right > work_rect.right)
			destrect.right = work_rect.right;
		if(destrect.top < 0)
			destrect.top = 0;
		if(destrect.bottom > work_rect.bottom)
			destrect.bottom = work_rect.bottom;
	}

	work_rect.Set(	0,0,fbuffer->gcinfo.width-1,fbuffer->gcinfo.height-1);

	if( !(work_rect.Contains(sourcerect)) )
	{	// something in selection must be clipped
		if(sourcerect.left < 0)
			sourcerect.left = 0;
		if(sourcerect.right > work_rect.right)
			sourcerect.right = work_rect.right;
		if(sourcerect.top < 0)
			sourcerect.top = 0;
		if(sourcerect.bottom > work_rect.bottom)
			sourcerect.bottom = work_rect.bottom;
	}

	// Set pointers to the actual data
	uint8 *dest_bits  = (uint8*) destbmp->Bits();	
	uint8 *src_bits = (uint8*) fbuffer->gcinfo.frame_buffer;

	// Get row widths for offset looping
	uint32 dest_width  = uint32 (destbmp->BytesPerRow());
	uint32 src_width = uint32 (fbuffer->gcinfo.bytes_per_row);

	// Offset bitmap pointers to proper spot in each bitmap
	src_bits += uint32 ( (sourcerect.top  * src_width)  + (sourcerect.left  * colorspace_size) );
	dest_bits += uint32 ( (destrect.top * dest_width) + (destrect.left * colorspace_size) );

	uint32 line_length = uint32 ((destrect.right - destrect.left+1)*colorspace_size);
	uint32 lines = uint32 (destrect.bottom-destrect.top+1);

	for (uint32 pos_y = 0; pos_y != lines; pos_y++)
	{ 
		memcpy(dest_bits,src_bits,line_length);

		// Increment offsets
   		src_bits += src_width;
   		dest_bits += dest_width;
	}
}

void ScreenDriver::InvertRect(BRect r)
{
	_Lock();
	if(fbuffer->IsConnected())
	{
		if(r.top<0 || r.left<0 || 
			r.right>fbuffer->gcinfo.width-1 || r.bottom>fbuffer->gcinfo.height-1)
		{
			_Unlock();
			return;
		}
		
		switch(fbuffer->gcinfo.bits_per_pixel)
		{
			case 32:
			case 24:
			{
				uint16 width=r.IntegerWidth(), height=r.IntegerHeight();
				uint32 *start=(uint32*)fbuffer->gcinfo.frame_buffer, *index;
				start+=int32(r.top)*fbuffer->gcinfo.width;
				start+=int32(r.left);
				
				for(int32 i=0;i<height;i++)
				{
					index=start + (i*fbuffer->gcinfo.width);
					for(int32 j=0; j<width; j++)
						index[j]^=0xFFFFFF00L;
				}
				break;
			}
			case 16:
				// TODO: Implement
				printf("ScreenDriver::16-bit mode unimplemented\n");
				break;
			case 15:
				// TODO: Implement
				printf("ScreenDriver::15-bit mode unimplemented\n");
				break;
			case 8:
				// TODO: Implement
				printf("ScreenDriver::8-bit mode unimplemented\n");
				break;
			default:
				break;
		}

	}
	_Unlock();
}


float ScreenDriver::StringWidth(const char *string, int32 length, LayerData *d)
{
	if(!string || !d || !d->font)
		return 0.0;
	_Lock();

	ServerFont *font=d->font;
	FontStyle *style=font->Style();

	if(!style)
	{
		_Unlock();
		return 0.0;
	}

	FT_Face face;
	FT_GlyphSlot slot;
	FT_UInt glyph_index, previous=0;
	FT_Vector pen,delta;
	int16 error=0;
	int32 strlength,i;
	float returnval;

	error=FT_New_Face(ftlib, style->GetPath(), 0, &face);
	if(error)
	{
		_Unlock();
		return 0.0;
	}

	slot=face->glyph;

	bool use_kerning=FT_HAS_KERNING(face) && font->Spacing()==B_STRING_SPACING;
	
	error=FT_Set_Char_Size(face, 0,int32(font->Size())*64,72,72);
	if(error)
	{
		_Unlock();
		return 0.0;
	}

	// set the pen position in 26.6 cartesian space coordinates
	pen.x=0;
	
	slot=face->glyph;
	
	strlength=strlen(string);
	if(length<strlength)
		strlength=length;

	for(i=0;i<strlength;i++)
	{
		// get kerning and move pen
		if(use_kerning && previous && glyph_index)
		{
			FT_Get_Kerning(face, previous, glyph_index,ft_kerning_default, &delta);
			pen.x+=delta.x;
		}

		error=FT_Load_Char(face,string[i],FT_LOAD_MONOCHROME);

		// increment pen position
		pen.x+=slot->advance.x;
		previous=glyph_index;
	}

	FT_Done_Face(face);

	returnval=pen.x>>6;
	_Unlock();
	return returnval;
}

float ScreenDriver::StringHeight(const char *string, int32 length, LayerData *d)
{
	if(!string || !d || !d->font)
		return 0.0;
	_Lock();

	ServerFont *font=d->font;
	FontStyle *style=font->Style();

	if(!style)
	{
		_Unlock();
		return 0.0;
	}

	FT_Face face;
	FT_GlyphSlot slot;
	int16 error=0;
	int32 strlength,i;
	float returnval=0.0,ascent=0.0,descent=0.0;

	error=FT_New_Face(ftlib, style->GetPath(), 0, &face);
	if(error)
	{
		_Unlock();
		return 0.0;
	}

	slot=face->glyph;
	
	error=FT_Set_Char_Size(face, 0,int32(font->Size())*64,72,72);
	if(error)
	{
		_Unlock();
		return 0.0;
	}

	slot=face->glyph;
	
	strlength=strlen(string);
	if(length<strlength)
		strlength=length;

	for(i=0;i<strlength;i++)
	{
		FT_Load_Char(face,string[i],FT_LOAD_RENDER);
		if(slot->metrics.horiBearingY<slot->metrics.height)
			descent=MAX((slot->metrics.height-slot->metrics.horiBearingY)>>6,descent);
		else
			ascent=MAX(slot->bitmap.rows,ascent);
	}
	_Unlock();

	FT_Done_Face(face);

	returnval=ascent+descent;
	_Unlock();
	return returnval;
}

void ScreenDriver::DrawString(const char *string, int32 length, BPoint pt, LayerData *d, escapement_delta *edelta=NULL)
{
	if(!string || !d || !d->font)
		return;

	_Lock();

	pt.y--;	// because of Be's backward compatibility hack

	ServerFont *font=d->font;
	FontStyle *style=font->Style();

	if(!style)
	{
		_Unlock();
		return;
	}

	FT_Face face;
	FT_GlyphSlot slot;
	FT_Matrix rmatrix,smatrix;
	FT_UInt glyph_index, previous=0;
	FT_Vector pen,delta,space,nonspace;
	int16 error=0;
	int32 strlength,i;
	Angle rotation(font->Rotation()), shear(font->Shear());

	bool antialias=( (font->Size()<18 && font->Flags()& B_DISABLE_ANTIALIASING==0)
		|| font->Flags()& B_FORCE_ANTIALIASING)?true:false;

	// Originally, I thought to do this shear checking here, but it really should be
	// done in BFont::SetShear()
	float shearangle=shear.Value();
	if(shearangle>135)
		shearangle=135;
	if(shearangle<45)
		shearangle=45;

	if(shearangle>90)
		shear=90+((180-shearangle)*2);
	else
		shear=90-(90-shearangle)*2;
	
	error=FT_New_Face(ftlib, style->GetPath(), 0, &face);
	if(error)
	{
		printf("Couldn't create face object\n");
		_Unlock();
		return;
	}

	slot=face->glyph;

	bool use_kerning=FT_HAS_KERNING(face) && font->Spacing()==B_STRING_SPACING;
	
	error=FT_Set_Char_Size(face, 0,int32(font->Size())*64,72,72);
	if(error)
	{
		_Unlock();
		return;
	}

	// if we do any transformation, we do a call to FT_Set_Transform() here
	
	// First, rotate
	rmatrix.xx = (FT_Fixed)( rotation.Cosine()*0x10000); 
	rmatrix.xy = (FT_Fixed)( rotation.Sine()*0x10000); 
	rmatrix.yx = (FT_Fixed)(-rotation.Sine()*0x10000); 
	rmatrix.yy = (FT_Fixed)( rotation.Cosine()*0x10000); 
	
	// Next, shear
	smatrix.xx = (FT_Fixed)(0x10000); 
	smatrix.xy = (FT_Fixed)(-shear.Cosine()*0x10000); 
	smatrix.yx = (FT_Fixed)(0); 
	smatrix.yy = (FT_Fixed)(0x10000); 

	//FT_Matrix_Multiply(&rmatrix,&smatrix);
	FT_Matrix_Multiply(&smatrix,&rmatrix);
	
	// Set up the increment value for escapement padding
	space.x=int32(d->edelta.space * rotation.Cosine()*64);
	space.y=int32(d->edelta.space * rotation.Sine()*64);
	nonspace.x=int32(d->edelta.nonspace * rotation.Cosine()*64);
	nonspace.y=int32(d->edelta.nonspace * rotation.Sine()*64);
	
	// set the pen position in 26.6 cartesian space coordinates
	pen.x=(int32)pt.x * 64;
	pen.y=(int32)pt.y * 64;
	
	slot=face->glyph;

	
	strlength=strlen(string);
	if(length<strlength)
		strlength=length;

	for(i=0;i<strlength;i++)
	{
		//FT_Set_Transform(face,&smatrix,&pen);
		FT_Set_Transform(face,&rmatrix,&pen);

		// Handle escapement padding option
		if((uint8)string[i]<=0x20)
		{
			pen.x+=space.x;
			pen.y+=space.y;
		}
		else
		{
			pen.x+=nonspace.x;
			pen.y+=nonspace.y;
		}

	
		// get kerning and move pen
		if(use_kerning && previous && glyph_index)
		{
			FT_Get_Kerning(face, previous, glyph_index,ft_kerning_default, &delta);
			pen.x+=delta.x;
			pen.y+=delta.y;
		}

		error=FT_Load_Char(face,string[i],
			((antialias)?FT_LOAD_RENDER:FT_LOAD_RENDER | FT_LOAD_MONOCHROME) );

		if(!error)
		{
			if(antialias)
				BlitGray2RGB32(&slot->bitmap,
					BPoint(slot->bitmap_left,pt.y-(slot->bitmap_top-pt.y)), d);
			else
				BlitMono2RGB32(&slot->bitmap,
					BPoint(slot->bitmap_left,pt.y-(slot->bitmap_top-pt.y)), d);
		}
		else
			printf("Couldn't load character %c\n", string[i]);

		// increment pen position
		pen.x+=slot->advance.x;
		pen.y+=slot->advance.y;
		previous=glyph_index;
	}
	FT_Done_Face(face);
	_Unlock();
}

void ScreenDriver::BlitMono2RGB32(FT_Bitmap *src, BPoint pt, LayerData *d)
{
	rgb_color color=d->highcolor.GetColor32();
	
	// pointers to the top left corner of the area to be copied in each bitmap
	uint8 *srcbuffer, *destbuffer;
	
	// index pointers which are incremented during the course of the blit
	uint8 *srcindex, *destindex, *rowptr, value;
	
	// increment values for the index pointers
	int32 srcinc=src->pitch, destinc=fbuffer->gcinfo.bytes_per_row;
	
	int16 i,j,k, srcwidth=src->pitch, srcheight=src->rows;
	int32 x=(int32)pt.x,y=(int32)pt.y;
	
	// starting point in source bitmap
	srcbuffer=(uint8*)src->buffer;

	if(y<0)
	{
		if(y<pt.y)
			y++;
		srcbuffer+=srcinc * (0-y);
		srcheight-=srcinc;
		destbuffer+=destinc * (0-y);
	}

	if(y+srcheight>fbuffer->gcinfo.height)
	{
		if(y>pt.y)
			y--;
		srcheight-=(y+srcheight-1)-fbuffer->gcinfo.height;
	}

	if(x+srcwidth>fbuffer->gcinfo.width)
	{
		if(x>pt.x)
			x--;
		srcwidth-=(x+srcwidth-1)-fbuffer->gcinfo.width;
	}
	
	if(x<0)
	{
		if(x<pt.x)
			x++;
		srcbuffer+=(0-x)>>3;
		srcwidth-=0-x;
		destbuffer+=(0-x)*4;
	}
	
	// starting point in destination bitmap
	destbuffer=(uint8*)fbuffer->gcinfo.frame_buffer+int32( (pt.y*fbuffer->gcinfo.bytes_per_row)+(pt.x*4) );

	srcindex=srcbuffer;
	destindex=destbuffer;

	for(i=0; i<srcheight; i++)
	{
		rowptr=destindex;		

		for(j=0;j<srcwidth;j++)
		{
			for(k=0; k<8; k++)
			{
				value=*(srcindex+j) & (1 << (7-k));
				if(value)
				{
					rowptr[0]=color.blue;
					rowptr[1]=color.green;
					rowptr[2]=color.red;
					rowptr[3]=color.alpha;
				}

				rowptr+=4;
			}

		}
		
		srcindex+=srcinc;
		destindex+=destinc;
	}

}

void ScreenDriver::BlitGray2RGB32(FT_Bitmap *src, BPoint pt, LayerData *d)
{
	// pointers to the top left corner of the area to be copied in each bitmap
	uint8 *srcbuffer=NULL, *destbuffer=NULL;
	
	// index pointers which are incremented during the course of the blit
	uint8 *srcindex=NULL, *destindex=NULL, *rowptr=NULL;
	
	rgb_color highcolor=d->highcolor.GetColor32(), lowcolor=d->lowcolor.GetColor32();	float rstep,gstep,bstep,astep;

	rstep=float(highcolor.red-lowcolor.red)/255.0;
	gstep=float(highcolor.green-lowcolor.green)/255.0;
	bstep=float(highcolor.blue-lowcolor.blue)/255.0;
	astep=float(highcolor.alpha-lowcolor.alpha)/255.0;
	
	// increment values for the index pointers
	int32 x=(int32)pt.x,
		y=(int32)pt.y,
		srcinc=src->pitch,
//		destinc=dest->BytesPerRow(),
		destinc=fbuffer->gcinfo.bytes_per_row,
		srcwidth=src->width,
		srcheight=src->rows,
		incval=0;
	
	int16 i,j;
	
	// starting point in source bitmap
	srcbuffer=(uint8*)src->buffer;

	// starting point in destination bitmap
//	destbuffer=(uint8*)dest->Bits()+(y*dest->BytesPerRow()+(x*4));
	destbuffer=(uint8*)fbuffer->gcinfo.frame_buffer+(y*fbuffer->gcinfo.bytes_per_row+(x*4));


	if(y<0)
	{
		if(y<pt.y)
			y++;
		
		incval=0-y;
		
		srcbuffer+=incval * srcinc;
		srcheight-=incval;
		destbuffer+=incval * destinc;
	}

	if(y+srcheight>fbuffer->gcinfo.height)
	{
		if(y>pt.y)
			y--;
		srcheight-=(y+srcheight-1)-fbuffer->gcinfo.height;
	}

	if(x+srcwidth>fbuffer->gcinfo.width)
	{
		if(x>pt.x)
			x--;
		srcwidth-=(x+srcwidth-1)-fbuffer->gcinfo.width;
	}
	
	if(x<0)
	{
		if(x<pt.x)
			x++;
		incval=0-x;
		srcbuffer+=incval;
		srcwidth-=incval;
		destbuffer+=incval*4;
	}

	int32 value;

	srcindex=srcbuffer;
	destindex=destbuffer;

	for(i=0; i<srcheight; i++)
	{
		rowptr=destindex;		

		for(j=0;j<srcwidth;j++)
		{
			value=*(srcindex+j) ^ 255;

			if(value!=255)
			{
				if(d->draw_mode==B_OP_COPY)
				{
					rowptr[0]=uint8(highcolor.blue-(value*bstep));
					rowptr[1]=uint8(highcolor.green-(value*gstep));
					rowptr[2]=uint8(highcolor.red-(value*rstep));
					rowptr[3]=255;
				}
				else
					if(d->draw_mode==B_OP_OVER)
					{
						if(highcolor.alpha>127)
						{
							rowptr[0]=uint8(highcolor.blue-(value*(float(highcolor.blue-rowptr[0])/255.0)));
							rowptr[1]=uint8(highcolor.green-(value*(float(highcolor.green-rowptr[1])/255.0)));
							rowptr[2]=uint8(highcolor.red-(value*(float(highcolor.red-rowptr[2])/255.0)));
							rowptr[3]=255;
						}
					}
			}
			rowptr+=4;

		}
		
		srcindex+=srcinc;
		destindex+=destinc;
	}
}

rgb_color ScreenDriver::GetBlitColor(rgb_color src, rgb_color dest, LayerData *d, bool use_high=true)
{
	rgb_color returncolor={0,0,0,0};
	int16 value;
	if(!d)
		return returncolor;
	
	switch(d->draw_mode)
	{
		case B_OP_COPY:
		{
			return src;
		}
		case B_OP_ADD:
		{
			value=src.red+dest.red;
			returncolor.red=(value>255)?255:value;

			value=src.green+dest.green;
			returncolor.green=(value>255)?255:value;

			value=src.blue+dest.blue;
			returncolor.blue=(value>255)?255:value;
			return returncolor;
		}
		case B_OP_SUBTRACT:
		{
			value=src.red-dest.red;
			returncolor.red=(value<0)?0:value;

			value=src.green-dest.green;
			returncolor.green=(value<0)?0:value;

			value=src.blue-dest.blue;
			returncolor.blue=(value<0)?0:value;
			return returncolor;
		}
		case B_OP_BLEND:
		{
			value=int16(src.red+dest.red)>>1;
			returncolor.red=value;

			value=int16(src.green+dest.green)>>1;
			returncolor.green=value;

			value=int16(src.blue+dest.blue)>>1;
			returncolor.blue=value;
			return returncolor;
		}
		case B_OP_MIN:
		{
			
			return ( uint16(src.red+src.blue+src.green) > 
				uint16(dest.red+dest.blue+dest.green) )?dest:src;
		}
		case B_OP_MAX:
		{
			return ( uint16(src.red+src.blue+src.green) < 
				uint16(dest.red+dest.blue+dest.green) )?dest:src;
		}
		case B_OP_OVER:
		{
			return (use_high && src.alpha>127)?src:dest;
		}
		case B_OP_INVERT:
		{
			returncolor.red=dest.red ^ 255;
			returncolor.green=dest.green ^ 255;
			returncolor.blue=dest.blue ^ 255;
			return (use_high && src.alpha>127)?returncolor:dest;
		}
		// This is a pain in the arse to implement, so I'm saving it for the real
		// server
		case B_OP_ALPHA:
		{
			return src;
		}
		case B_OP_ERASE:
		{
			// This one's tricky. 
			return (use_high && src.alpha>127)?d->lowcolor.GetColor32():dest;
		}
		case B_OP_SELECT:
		{
			// This one's tricky, too. We are passed a color in src. If it's the layer's
			// high color or low color, we check for a swap.
			if(d->highcolor==src)
				return (use_high && d->highcolor==dest)?d->lowcolor.GetColor32():dest;
			
			if(d->lowcolor==src)
				return (use_high && d->lowcolor==dest)?d->highcolor.GetColor32():dest;

			return dest;
		}
		default:
		{
			break;
		}
	}
	_Unlock();
	return returncolor;
}