haiku/src/servers/app/server/AccelerantDriver.cpp

//------------------------------------------------------------------------------
//	Copyright (c) 2001-2003, 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
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//	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:		AccelerantDriver.cpp
//	Author:			Gabe Yoder <gyoder@stny.rr.com>
//	Description:		A display driver which works directly with the
//				accelerant for the graphics card.
//  
//------------------------------------------------------------------------------
#include "AccelerantDriver.h"
#include "ServerCursor.h"
#include "ServerBitmap.h"
#include "LayerData.h"
#include <FindDirectory.h>
#include <graphic_driver.h>
#include <malloc.h>

/*!
	\brief Sets up internal variables needed by AccelerantDriver
	
*/
AccelerantDriver::AccelerantDriver(void) : DisplayDriver()
{
  //drawmode = DRAW_COPY;
  drawmode = 0;

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

  card_fd = -1;
  accelerant_image = -1;
//  accelerant_hook = NULL;
  mode_list = NULL;
}


/*!
	\brief Deletes the heap memory used by the AccelerantDriver
	
*/
AccelerantDriver::~AccelerantDriver(void)
{
  if (cursor)
	delete cursor;
  if (under_cursor)
	delete under_cursor;
  if (mode_list)
	free(mode_list);
}

/*!
	\brief Initializes the driver object.
	\return true if successful, false if not
	
	Initialize sets up the driver for display, including the initial clearing
	of the screen. If things do not go as they should, false should be returned.
*/
bool AccelerantDriver::Initialize(void)
{
  int i;
  char signature[1024];
  char path[PATH_MAX];
  struct stat accelerant_stat;
  const static directory_which dirs[] =
  {
	B_USER_ADDONS_DIRECTORY,
	B_COMMON_ADDONS_DIRECTORY,
	B_BEOS_ADDONS_DIRECTORY
  };

  //card_fd = open("/dev/graphics/1002_4755_000400",B_READ_WRITE);
  card_fd = open("/dev/graphics/nv10_010000",B_READ_WRITE);
  //card_fd = open("/dev/graphics/stub",B_READ_WRITE);
  if ( card_fd < 0 )
  {
	printf("Failed to open graphics device\n");
	return false;
  }

  if (ioctl(card_fd, B_GET_ACCELERANT_SIGNATURE, &signature, sizeof(signature)) != B_OK)
  {
	close(card_fd);
	return false;
  }
//printf("signature %s\n",signature);

  accelerant_image = -1;
  for (i=0; i<3; i++)
  {
	if (find_directory (dirs[i], -1, false, path, PATH_MAX) != B_OK)
	  continue;
	strcat(path,"/accelerants/");
	strcat(path,signature);
	if (stat(path, &accelerant_stat) != 0)
	  continue;
	accelerant_image = load_add_on(path);
	if (accelerant_image >= 0)
	{
	  if ( get_image_symbol(accelerant_image,B_ACCELERANT_ENTRY_POINT,
			B_SYMBOL_TYPE_ANY,(void**)(&accelerant_hook)) != B_OK )
		return false;

	  init_accelerant InitAccelerant;
	  InitAccelerant = (init_accelerant)accelerant_hook(B_INIT_ACCELERANT,NULL);
	  if (!InitAccelerant || (InitAccelerant(card_fd) != B_OK))
		return false;
	  break;
	}
  }
  if (accelerant_image < 0)
	return false;

  int mode_count;
  accelerant_mode_count GetModeCount = (accelerant_mode_count)accelerant_hook(B_ACCELERANT_MODE_COUNT, NULL);
  if ( !GetModeCount )
	return false;
  mode_count = GetModeCount();
  if ( !mode_count )
	return false;
  get_mode_list GetModeList = (get_mode_list)accelerant_hook(B_GET_MODE_LIST, NULL);
  if ( !GetModeList )
	return false;
  mode_list = (display_mode *)calloc(sizeof(display_mode), mode_count);
  if ( !mode_list )
	return false;
  if ( GetModeList(mode_list) != B_OK )
	return false;

#if 0
  set_display_mode SetDisplayMode = (set_display_mode)accelerant_hook(B_SET_DISPLAY_MODE, NULL);
  if ( !SetDisplayMode )
	return false;
  /* Use the first mode in the list */
  if ( SetDisplayMode(mode_list) != B_OK )
	return false;
#endif

  get_display_mode GetDisplayMode = (get_display_mode)accelerant_hook(B_GET_DISPLAY_MODE,NULL);
  if ( !GetDisplayMode )
	return false;
  if ( GetDisplayMode(&mDisplayMode) != B_OK )
	return FALSE;
  //_SetDepth(mDisplayMode.space);
  _SetWidth(mDisplayMode.virtual_width);
  _SetHeight(mDisplayMode.virtual_height);
  //_SetMode(mDisplayMode.flags); ???


  get_frame_buffer_config GetFrameBufferConfig = (get_frame_buffer_config)accelerant_hook(B_GET_FRAME_BUFFER_CONFIG, NULL);
  if ( !GetFrameBufferConfig )
	return false;
  if ( GetFrameBufferConfig(&mFrameBufferConfig) != B_OK )
	return false;

  return true;
}

/*!
	\brief Shuts down the driver's video subsystem
	
	Any work done by Initialize() should be undone here. Note that Shutdown() is
	called even if Initialize() was unsuccessful.
*/
void AccelerantDriver::Shutdown(void)
{
  uninit_accelerant UninitAccelerant = (uninit_accelerant)accelerant_hook(B_UNINIT_ACCELERANT,NULL);
  if ( UninitAccelerant )
    UninitAccelerant();
  if (accelerant_image >= 0)
	unload_add_on(accelerant_image);
  if (card_fd >= 0)
	close(card_fd);
}

/*!
	\brief Called for all BView::CopyBits calls
	\param src Source rectangle.
	\param rect Destination rectangle.
	
	Bounds checking must be done in this call. If the destination is not the same size 
	as the source, the source should be scaled to fit.
*/
void AccelerantDriver::CopyBits(BRect src, BRect dest)
{
}

/*!
	\brief Called for all BView::DrawBitmap calls
	\param bmp Bitmap to be drawn. It will always be non-NULL and valid. The color 
	space is not guaranteed to match.
	\param src Source rectangle
	\param dest Destination rectangle. Source will be scaled to fit if not the same size.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	
	Bounds checking must be done in this call.
*/
void AccelerantDriver::DrawBitmap(ServerBitmap *bmp, BRect src, BRect dest, LayerData *d)
{
}

/*!
	\brief Utilizes the font engine to draw a string to the frame buffer
	\param string String to be drawn. Always non-NULL.
	\param length Number of characters in the string to draw. Always greater than 0. If greater
	than the number of characters in the string, draw the entire string.
	\param pt Point at which the baseline starts. Characters are to be drawn 1 pixel above
	this for backwards compatibility. While the point itself is guaranteed to be inside
	the frame buffers coordinate range, the clipping of each individual glyph must be
	performed by the driver itself.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param delta Extra character padding
*/
void AccelerantDriver::DrawString(const char *string, int32 length, BPoint pt, LayerData *d, escapement_delta *delta=NULL)
{
}

/*!
	\brief Called for all BView::FillArc calls
	\param r Rectangle enclosing the entire arc
	\param angle Starting angle for the arc in degrees
	\param span Span of the arc in degrees. Ending angle = angle+span.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the arc may end up
	being clipped.
*/
void AccelerantDriver::FillArc(BRect r, float angle, float span, LayerData *d, int8 *pat)
{
}

/*!
	\brief Called for all BView::FillBezier calls.
	\param pts 4-element array of BPoints in the order of start, end, and then the two control
	points. 
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call.
*/
void AccelerantDriver::FillBezier(BPoint *pts, LayerData *d, int8 *pat)
{
}

/*!
	\brief Called for all BView::FillEllipse calls
	\param BRect enclosing the ellipse to be drawn.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the ellipse may end up
	being clipped.
*/
void AccelerantDriver::FillEllipse(BRect r, LayerData *d, int8 *pat)
{
}

/*!
	\brief Called for all BView::FillPolygon calls
	\param ptlist Array of BPoints defining the polygon.
	\param numpts Number of points in the BPoint array.
	\param rect Rectangle which contains the polygon
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	The points in the array are not guaranteed to be within the framebuffer's 
	coordinate range.
*/
void AccelerantDriver::FillPolygon(BPoint *ptlist, int32 numpts, BRect rect, LayerData *d, int8 *pat)
{
}

/*!
	\brief Called for all BView::FillRect calls
	\param r BRect to be filled. Guaranteed to be in the frame buffer's coordinate space
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

*/
void AccelerantDriver::FillRect(BRect r, LayerData *d, int8 *pat)
{
/* Need to add check for possible hardware acceleration of this */
/* Need to deal with pattern */
	_Lock();

	switch (mDisplayMode.space)
	{
		case B_CMAP8:
			{
			} break;
		case B_RGB16_BIG:
		case B_RGB16_LITTLE:
		case B_RGB15_BIG:
		case B_RGBA15_BIG:
		case B_RGB15_LITTLE:
		case B_RGBA15_LITTLE:
			{
			} break;
		case B_RGB32_BIG:
		case B_RGBA32_BIG:
		case B_RGB32_LITTLE:
		case B_RGBA32_LITTLE:
			{
				uint32 *fb = (uint32 *)((uint8 *)mFrameBufferConfig.frame_buffer + (int)r.top*mFrameBufferConfig.bytes_per_row);
				int x,y;
				rgb_color color = d->highcolor.GetColor32();
				uint32 drawcolor = (color.alpha << 24) | (color.red << 16) | (color.green << 8) | (color.blue);
				for (y=(int)r.top; y<=(int)r.bottom; y++)
				{
					for (x=(int)r.left; x<=r.right; x++)
					{
						fb[x] = drawcolor;
					}
					fb = (uint32 *)((uint8 *)fb + mFrameBufferConfig.bytes_per_row);
				}
			} break;
		default:
			printf("Error: Unknown color space\n");
	}

	_Unlock();
}

/*!
	\brief Called for all BView::FillRoundRect calls
	\param r Rectangle to fill
	\param X radius of the corner arcs
	\param Y radius of the corner arcs
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the roundrect may end 
	up being clipped.
*/
void AccelerantDriver::FillRoundRect(BRect r, float xrad, float yrad, LayerData *d, int8 *pat)
{
}

//void AccelerantDriver::FillShape(SShape *sh, LayerData *d, int8 *pat)
//{
//}

/*!
	\brief Called for all BView::FillTriangle calls
	\param pts Array of 3 BPoints. Always non-NULL.
	\param r BRect enclosing the triangle. While it will definitely enclose the triangle,
	it may not be within the frame buffer's bounds.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the triangle may end 
	up being clipped.
*/
void AccelerantDriver::FillTriangle(BPoint *pts, BRect r, LayerData *d, int8 *pat)
{
}

/*!
	\brief Hides the cursor.
	
	Hide calls are not nestable, unlike that of the BApplication class. Subclasses should
	call _SetCursorHidden(true) somewhere within this function to ensure that data is
	maintained accurately.
*/
void AccelerantDriver::HideCursor(void)
{
//	_SetCursorHidden(true);
}

/*!
	\brief Moves the cursor to the given point.
	\param x Cursor's new x coordinate
	\param y Cursor's new y coordinate

	The coordinates passed to MoveCursorTo are guaranteed to be within the frame buffer's
	range, but the cursor data itself will need to be clipped. A check to see if the 
	cursor is obscured should be made and if so, a call to _SetCursorObscured(false) 
	should be made the cursor in addition to displaying at the passed coordinates.
*/
void AccelerantDriver::MoveCursorTo(float x, float y)
{
}

/*!
	\brief Inverts the colors in the rectangle.
	\param r Rectangle of the area to be inverted. Guaranteed to be within bounds.
*/
void AccelerantDriver::InvertRect(BRect r)
{
}

/*!
	\brief Shows the cursor.
	
	Show calls are not nestable, unlike that of the BApplication class. Subclasses should
	call _SetCursorHidden(false) somewhere within this function to ensure that data is
	maintained accurately.
*/
void AccelerantDriver::ShowCursor(void)
{
	//_SetCursorHidden(false);
}

/*!
	\brief Obscures the cursor.
	
	Obscure calls are not nestable. Subclasses should call _SetCursorObscured(true) 
	somewhere within this function to ensure that data is maintained accurately. When the
	next call to MoveCursorTo() is made, the cursor will be shown again.
*/
void AccelerantDriver::ObscureCursor(void)
{
	//_SetCursorObscured(true);
}

/*!
	\brief Changes the cursor.
	\param cursor The new cursor. Guaranteed to be non-NULL.
	
	The driver does not take ownership of the given cursor. Subclasses should make
	a copy of the cursor passed to it. The default version of this function hides the
	cursor, replaces it, and shows the cursor if previously visible.
*/
void AccelerantDriver::SetCursor(ServerCursor *cursor)
{
}

/*!
	\brief Called for all BView::StrokeArc calls
	\param r Rectangle enclosing the entire arc
	\param angle Starting angle for the arc in degrees
	\param span Span of the arc in degrees. Ending angle = angle+span.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the arc may end up
	being clipped.
*/void AccelerantDriver::StrokeArc(BRect r, float angle, float span, LayerData *d, int8 *pat)
{
}

/*!
	\brief Called for all BView::StrokeBezier calls.
	\param pts 4-element array of BPoints in the order of start, end, and then the two control
	points. 
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call.
*/
void AccelerantDriver::StrokeBezier(BPoint *pts, LayerData *d, int8 *pat)
{
/* Need to add bounds checking code */
/* Probably should check to make sure that we have at least 4 points */
	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;
	}
}

/*!
	\brief Called for all BView::StrokeEllipse calls
	\param r BRect enclosing the ellipse to be drawn.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the ellipse may end up
	being clipped.
*/
void AccelerantDriver::StrokeEllipse(BRect r, LayerData *d, int8 *pat)
{
}

/*!
	\brief Draws a line. Really.
	\param start Starting point
	\param end Ending point
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.
	
	The endpoints themselves are guaranteed to be in bounds, but clipping for lines with
	a thickness greater than 1 will need to be done.
*/
void AccelerantDriver::StrokeLine(BPoint start, BPoint end, LayerData *d, int8 *pat)
{
	_Lock();
	int x1 = ROUND(start.x);
	int y1 = ROUND(start.y);
	int x2 = ROUND(end.x);
	int y2 = ROUND(end.y);
	int dx = x2 - x1;
	int dy = y2 - y1;
	int steps, k;
	double xInc, yInc;
	double x = x1;
	double y = y1;

	if ( abs(dx) > abs(dy) )
		steps = abs(dx);
	else
		steps = abs(dy);
	xInc = dx / (double) steps;
	yInc = dy / (double) steps;

	SetPixel(ROUND(x),ROUND(y),d->highcolor);
	for (k=0; k<steps; k++)
	{
		x += xInc;
		y += yInc;
		SetPixel(ROUND(x),ROUND(y),d->highcolor);
	}
	_Unlock();
}

/*!
	\brief Called for all BView::StrokePolygon calls
	\param ptlist Array of BPoints defining the polygon.
	\param numpts Number of points in the BPoint array.
	\param rect Rectangle which contains the polygon
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	The points in the array are not guaranteed to be within the framebuffer's 
	coordinate range.
*/
void AccelerantDriver::StrokePolygon(BPoint *ptlist, int32 numpts, BRect rect, LayerData *d, int8 *pat, bool is_closed=true)
{
}

/*!
	\brief Called for all BView::StrokeRect calls
	\param r BRect to be filled. Guaranteed to be in the frame buffer's coordinate space
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

*/
void AccelerantDriver::StrokeRect(BRect r, LayerData *d, int8 *pat)
{
}

/*!
	\brief Called for all BView::StrokeRoundRect calls
	\param r The rect itself
	\param xrad X radius of the corner arcs
	\param yrad Y radius of the corner arcs
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the roundrect may end 
	up being clipped.
*/
void AccelerantDriver::StrokeRoundRect(BRect r, float xrad, float yrad, LayerData *d, int8 *pat)
{
}

//void AccelerantDriver::StrokeShape(SShape *sh, LayerData *d, int8 *pat)
//{
//}

/*!
	\brief Called for all BView::StrokeTriangle calls
	\param pts Array of 3 BPoints. Always non-NULL.
	\param r BRect enclosing the triangle. While it will definitely enclose the triangle,
	it may not be within the frame buffer's bounds.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\param pat 8-byte array containing the pattern to use. Always non-NULL.

	Bounds checking must be done in this call because only part of the triangle may end 
	up being clipped.
*/
void AccelerantDriver::StrokeTriangle(BPoint *pts, BRect r, LayerData *d, int8 *pat)
{
}

/*!
	\brief Draws a series of lines - optimized for speed
	\param pts Array of BPoints pairs
	\param numlines Number of lines to be drawn
	\param colors Array of colors for each respective line
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	
	Data for this call is passed directly from userland - this call is responsible for all
	checking. All lines are to be processed in the call using the same LayerData settings
	for each line.
*/
void AccelerantDriver::StrokeLineArray(BPoint *pts, int32 numlines, RGBColor *colors, LayerData *d)
{
}

/*!
	\brief Sets the screen mode to specified resolution and color depth.
	\param mode constant as defined in GraphicsDefs.h
	
	Subclasses must include calls to _SetDepth, _SetHeight, _SetWidth, and _SetMode
	to update the state variables kept internally by the DisplayDriver class.
*/
void AccelerantDriver::SetMode(int32 mode)
{
}

/*!
	\brief Dumps the contents of the frame buffer to a file.
	\param path Path and leaf of the file to be created without an extension
	\return False if unimplemented or unsuccessful. True if otherwise.
	
	Subclasses should add an extension based on what kind of file is saved
*/
bool AccelerantDriver::DumpToFile(const char *path)
{
	return false;
}

/*!
	\brief Gets the width of a string in pixels
	\param string Source null-terminated string
	\param length Number of characters in the string
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\return Width of the string in pixels
	
	This corresponds to BView::StringWidth.
*/
float AccelerantDriver::StringWidth(const char *string, int32 length, LayerData *d)
{
	return 0.0;
}

/*!
	\brief Gets the height of a string in pixels
	\param string Source null-terminated string
	\param length Number of characters in the string
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	\return Height of the string in pixels
	
	The height calculated in this function does not include any padding - just the
	precise maximum height of the characters within and does not necessarily equate
	with a font's height, i.e. the strings 'case' and 'alps' will have different values
	even when called with all other values equal.
*/
float AccelerantDriver::StringHeight(const char *string, int32 length, LayerData *d)
{
	return 0.0;
}

/*!
	\brief Retrieves the bounding box each character in the string
	\param string Source null-terminated string
	\param count Number of characters in the string
	\param mode Metrics mode for either screen or printing
	\param delta Optional glyph padding. This value may be NULL.
	\param rectarray Array of BRect objects which will have at least count elements
	\param d Data structure containing any other data necessary for the call. Always non-NULL.

	See BFont::GetBoundingBoxes for more details on this function.
*/
void AccelerantDriver::GetBoundingBoxes(const char *string, int32 count, 
		font_metric_mode mode, escapement_delta *delta, BRect *rectarray, LayerData *d)
{
}

/*!
	\brief Retrieves the escapements for each character in the string
	\param string Source null-terminated string
	\param charcount Number of characters in the string
	\param delta Optional glyph padding. This value may be NULL.
	\param escapements Array of escapement_delta objects which will have at least charcount elements
	\param offsets Actual offset values when iterating over the string. This array will also 
		have at least charcount elements and the values placed therein will reflect 
		the current kerning/spacing mode.
	\param d Data structure containing any other data necessary for the call. Always non-NULL.
	
	See BFont::GetEscapements for more details on this function.
*/
void AccelerantDriver::GetEscapements(const char *string, int32 charcount, 
		escapement_delta *delta, escapement_delta *escapements, escapement_delta *offsets, LayerData *d)
{
}

/*!
	\brief Retrieves the inset values of each glyph from its escapement values
	\param string Source null-terminated string
	\param charcount Number of characters in the string
	\param edgearray Array of edge_info objects which will have at least charcount elements
	\param d Data structure containing any other data necessary for the call. Always non-NULL.

	See BFont::GetEdges for more details on this function.
*/
void AccelerantDriver::GetEdges(const char *string, int32 charcount, edge_info *edgearray, LayerData *d)
{
}

/*!
	\brief Determines whether a font contains a certain string of characters
	\param string Source null-terminated string
	\param charcount Number of characters in the string
	\param hasarray Array of booleans which will have at least charcount elements

	See BFont::GetHasGlyphs for more details on this function.
*/
void AccelerantDriver::GetHasGlyphs(const char *string, int32 charcount, bool *hasarray)
{
}

/*!
	\brief Truncates an array of strings to a certain width
	\param instrings Array of null-terminated strings
	\param stringcount Number of strings passed to the function
	\param mode Truncation mode
	\param maxwidth Maximum width for all strings
	\param outstrings String array provided by the caller into which the truncated strings are
		to be placed.

	See BFont::GetTruncatedStrings for more details on this function.
*/
void AccelerantDriver::GetTruncatedStrings( const char **instrings, int32 stringcount, 
	uint32 mode, float maxwidth, char **outstrings)
{
}

void AccelerantDriver::SetPixel(int x, int y, RGBColor col)
{
	switch (mDisplayMode.space)
	{
		case B_CMAP8:
			{
			} break;
		case B_RGB16_BIG:
		case B_RGB16_LITTLE:
		case B_RGB15_BIG:
		case B_RGBA15_BIG:
		case B_RGB15_LITTLE:
		case B_RGBA15_LITTLE:
			{
			} break;
		case B_RGB32_BIG:
		case B_RGBA32_BIG:
		case B_RGB32_LITTLE:
		case B_RGBA32_LITTLE:
			{
				uint32 *fb = (uint32 *)((uint8 *)mFrameBufferConfig.frame_buffer + y*mFrameBufferConfig.bytes_per_row);
				rgb_color color = col.GetColor32();
				fb[x] = (color.alpha << 24) | (color.red << 16) | (color.green << 8) | (color.blue);
			} break;
		default:
			printf("Error: Unknown color space\n");
	}
}

void AccelerantDriver::SetThickPixel(int x, int y, int thick, RGBColor col)
{
	switch (mDisplayMode.space)
	{
		case B_CMAP8:
			{
			} break;
		case B_RGB16_BIG:
		case B_RGB16_LITTLE:
		case B_RGB15_BIG:
		case B_RGBA15_BIG:
		case B_RGB15_LITTLE:
		case B_RGBA15_LITTLE:
			{
			} break;
		case B_RGB32_BIG:
		case B_RGBA32_BIG:
		case B_RGB32_LITTLE:
		case B_RGBA32_LITTLE:
			{
				int i,j;
				uint32 *fb = (uint32 *)((uint8 *)mFrameBufferConfig.frame_buffer + (y-thick/2)*mFrameBufferConfig.bytes_per_row) + x-thick/2;
				rgb_color color = col.GetColor32();
				uint32 drawcolor = (color.alpha << 24) | (color.red << 16) | (color.green << 8) | (color.blue);
				for (i=0; i<thick; i++)
				{
					for (j=0; j<thick; j++)
					{
						fb[j] = drawcolor;
					}
					fb = (uint32 *)((uint8 *)fb + mFrameBufferConfig.bytes_per_row);
				}
			} break;
		default:
			printf("Error: Unknown color space\n");
	}
}

void AccelerantDriver::HLine(int32 x1, int32 x2, int32 y, RGBColor col)
{
	switch (mDisplayMode.space)
	{
		case B_CMAP8:
			{
			} break;
		case B_RGB16_BIG:
		case B_RGB16_LITTLE:
		case B_RGB15_BIG:
		case B_RGBA15_BIG:
		case B_RGB15_LITTLE:
		case B_RGBA15_LITTLE:
			{
			} break;
		case B_RGB32_BIG:
		case B_RGBA32_BIG:
		case B_RGB32_LITTLE:
		case B_RGBA32_LITTLE:
			{
				uint32 *fb = (uint32 *)((uint8 *)mFrameBufferConfig.frame_buffer + y*mFrameBufferConfig.bytes_per_row);
				rgb_color color = col.GetColor32();
				uint32 drawcolor = (color.alpha << 24) | (color.red << 16) | (color.green << 8) | (color.blue);
				int x;
				if ( x1 > x2 )
				{
					x = x2;
					x2 = x1;
					x1 = x;
				}
				for (x=x1; x<x2; x++)
					fb[x] = drawcolor;
			} break;
		default:
			printf("Error: Unknown color space\n");
	}
}