FreeRDP/libfreerdp-gdi/gdi.c

/**
 * FreeRDP: A Remote Desktop Protocol Client
 * GDI Library
 *
 * Copyright 2010-2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <freerdp/freerdp.h>

#include "color.h"
#include "decode.h"

#include "gdi_dc.h"
#include "gdi_pen.h"
#include "gdi_line.h"
#include "gdi_shape.h"
#include "gdi_brush.h"
#include "gdi_region.h"
#include "gdi_bitmap.h"
#include "gdi_palette.h"
#include "gdi_drawing.h"
#include "gdi_clipping.h"

#include "gdi.h"

/* Ternary Raster Operation Table */
const uint32 rop3_code_table[] =
{
	0x00000042, /* 0 */
	0x00010289, /* DPSoon */
	0x00020C89, /* DPSona */
	0x000300AA, /* PSon */
	0x00040C88, /* SDPona */
	0x000500A9, /* DPon */
	0x00060865, /* PDSxnon */
	0x000702C5, /* PDSaon */
	0x00080F08, /* SDPnaa */
	0x00090245, /* PDSxon */
	0x000A0329, /* DPna */
	0x000B0B2A, /* PSDnaon */
	0x000C0324, /* SPna */
	0x000D0B25, /* PDSnaon */
	0x000E08A5, /* PDSonon */
	0x000F0001, /* Pn */
	0x00100C85, /* PDSona */
	0x001100A6, /* DSon */
	0x00120868, /* SDPxnon */
	0x001302C8, /* SDPaon */
	0x00140869, /* DPSxnon */
	0x001502C9, /* DPSaon */
	0x00165CCA, /* PSDPSanaxx */
	0x00171D54, /* SSPxDSxaxn */
	0x00180D59, /* SPxPDxa */
	0x00191CC8, /* SDPSanaxn */
	0x001A06C5, /* PDSPaox */
	0x001B0768, /* SDPSxaxn */
	0x001C06CA, /* PSDPaox */
	0x001D0766, /* DSPDxaxn */
	0x001E01A5, /* PDSox */
	0x001F0385, /* PDSoan */
	0x00200F09, /* DPSnaa */
	0x00210248, /* SDPxon */
	0x00220326, /* DSna */
	0x00230B24, /* SPDnaon */
	0x00240D55, /* SPxDSxa */
	0x00251CC5, /* PDSPanaxn */
	0x002606C8, /* SDPSaox */
	0x00271868, /* SDPSxnox */
	0x00280369, /* DPSxa */
	0x002916CA, /* PSDPSaoxxn */
	0x002A0CC9, /* DPSana */
	0x002B1D58, /* SSPxPDxaxn */
	0x002C0784, /* SPDSoax */
	0x002D060A, /* PSDnox */
	0x002E064A, /* PSDPxox */
	0x002F0E2A, /* PSDnoan */
	0x0030032A, /* PSna */
	0x00310B28, /* SDPnaon */
	0x00320688, /* SDPSoox */
	0x00330008, /* Sn */
	0x003406C4, /* SPDSaox */
	0x00351864, /* SPDSxnox */
	0x003601A8, /* SDPox */
	0x00370388, /* SDPoan */
	0x0038078A, /* PSDPoax */
	0x00390604, /* SPDnox */
	0x003A0644, /* SPDSxox */
	0x003B0E24, /* SPDnoan */
	0x003C004A, /* PSx */
	0x003D18A4, /* SPDSonox */
	0x003E1B24, /* SPDSnaox */
	0x003F00EA, /* PSan */
	0x00400F0A, /* PSDnaa */
	0x00410249, /* DPSxon */
	0x00420D5D, /* SDxPDxa */
	0x00431CC4, /* SPDSanaxn */
	0x00440328, /* SDna */
	0x00450B29, /* DPSnaon */
	0x004606C6, /* DSPDaox */
	0x0047076A, /* PSDPxaxn */
	0x00480368, /* SDPxa */
	0x004916C5, /* PDSPDaoxxn */
	0x004A0789, /* DPSDoax */
	0x004B0605, /* PDSnox */
	0x004C0CC8, /* SDPana */
	0x004D1954, /* SSPxDSxoxn */
	0x004E0645, /* PDSPxox */
	0x004F0E25, /* PDSnoan */
	0x00500325, /* PDna */
	0x00510B26, /* DSPnaon */
	0x005206C9, /* DPSDaox */
	0x00530764, /* SPDSxaxn */
	0x005408A9, /* DPSonon */
	0x00550009, /* Dn */
	0x005601A9, /* DPSox */
	0x00570389, /* DPSoan */
	0x00580785, /* PDSPoax */
	0x00590609, /* DPSnox */
	0x005A0049, /* DPx */
	0x005B18A9, /* DPSDonox */
	0x005C0649, /* DPSDxox */
	0x005D0E29, /* DPSnoan */
	0x005E1B29, /* DPSDnaox */
	0x005F00E9, /* DPan */
	0x00600365, /* PDSxa */
	0x006116C6, /* DSPDSaoxxn */
	0x00620786, /* DSPDoax */
	0x00630608, /* SDPnox */
	0x00640788, /* SDPSoax */
	0x00650606, /* DSPnox */
	0x00660046, /* DSx */
	0x006718A8, /* SDPSonox */
	0x006858A6, /* DSPDSonoxxn */
	0x00690145, /* PDSxxn */
	0x006A01E9, /* DPSax */
	0x006B178A, /* PSDPSoaxxn */
	0x006C01E8, /* SDPax */
	0x006D1785, /* PDSPDoaxxn */
	0x006E1E28, /* SDPSnoax */
	0x006F0C65, /* PDSxnan */
	0x00700CC5, /* PDSana */
	0x00711D5C, /* SSDxPDxaxn */
	0x00720648, /* SDPSxox */
	0x00730E28, /* SDPnoan */
	0x00740646, /* DSPDxox */
	0x00750E26, /* DSPnoan */
	0x00761B28, /* SDPSnaox */
	0x007700E6, /* DSan */
	0x007801E5, /* PDSax */
	0x00791786, /* DSPDSoaxxn */
	0x007A1E29, /* DPSDnoax */
	0x007B0C68, /* SDPxnan */
	0x007C1E24, /* SPDSnoax */
	0x007D0C69, /* DPSxnan */
	0x007E0955, /* SPxDSxo */
	0x007F03C9, /* DPSaan */
	0x008003E9, /* DPSaa */
	0x00810975, /* SPxDSxon */
	0x00820C49, /* DPSxna */
	0x00831E04, /* SPDSnoaxn */
	0x00840C48, /* SDPxna */
	0x00851E05, /* PDSPnoaxn */
	0x008617A6, /* DSPDSoaxx */
	0x008701C5, /* PDSaxn */
	0x008800C6, /* DSa */
	0x00891B08, /* SDPSnaoxn */
	0x008A0E06, /* DSPnoa */
	0x008B0666, /* DSPDxoxn */
	0x008C0E08, /* SDPnoa */
	0x008D0668, /* SDPSxoxn */
	0x008E1D7C, /* SSDxPDxax */
	0x008F0CE5, /* PDSanan */
	0x00900C45, /* PDSxna */
	0x00911E08, /* SDPSnoaxn */
	0x009217A9, /* DPSDPoaxx */
	0x009301C4, /* SPDaxn */
	0x009417AA, /* PSDPSoaxx */
	0x009501C9, /* DPSaxn */
	0x00960169, /* DPSxx */
	0x0097588A, /* PSDPSonoxx */
	0x00981888, /* SDPSonoxn */
	0x00990066, /* DSxn */
	0x009A0709, /* DPSnax */
	0x009B07A8, /* SDPSoaxn */
	0x009C0704, /* SPDnax */
	0x009D07A6, /* DSPDoaxn */
	0x009E16E6, /* DSPDSaoxx */
	0x009F0345, /* PDSxan */
	0x00A000C9, /* DPa */
	0x00A11B05, /* PDSPnaoxn */
	0x00A20E09, /* DPSnoa */
	0x00A30669, /* DPSDxoxn */
	0x00A41885, /* PDSPonoxn */
	0x00A50065, /* PDxn */
	0x00A60706, /* DSPnax */
	0x00A707A5, /* PDSPoaxn */
	0x00A803A9, /* DPSoa */
	0x00A90189, /* DPSoxn */
	0x00AA0029, /* D */
	0x00AB0889, /* DPSono */
	0x00AC0744, /* SPDSxax */
	0x00AD06E9, /* DPSDaoxn */
	0x00AE0B06, /* DSPnao */
	0x00AF0229, /* DPno */
	0x00B00E05, /* PDSnoa */
	0x00B10665, /* PDSPxoxn */
	0x00B21974, /* SSPxDSxox */
	0x00B30CE8, /* SDPanan */
	0x00B4070A, /* PSDnax */
	0x00B507A9, /* DPSDoaxn */
	0x00B616E9, /* DPSDPaoxx */
	0x00B70348, /* SDPxan */
	0x00B8074A, /* PSDPxax */
	0x00B906E6, /* DSPDaoxn */
	0x00BA0B09, /* DPSnao */
	0x00BB0226, /* DSno */
	0x00BC1CE4, /* SPDSanax */
	0x00BD0D7D, /* SDxPDxan */
	0x00BE0269, /* DPSxo */
	0x00BF08C9, /* DPSano */
	0x00C000CA, /* PSa */
	0x00C11B04, /* SPDSnaoxn */
	0x00C21884, /* SPDSonoxn */
	0x00C3006A, /* PSxn */
	0x00C40E04, /* SPDnoa */
	0x00C50664, /* SPDSxoxn */
	0x00C60708, /* SDPnax */
	0x00C707AA, /* PSDPoaxn */
	0x00C803A8, /* SDPoa */
	0x00C90184, /* SPDoxn */
	0x00CA0749, /* DPSDxax */
	0x00CB06E4, /* SPDSaoxn */
	0x00CC0020, /* S */
	0x00CD0888, /* SDPono */
	0x00CE0B08, /* SDPnao */
	0x00CF0224, /* SPno */
	0x00D00E0A, /* PSDnoa */
	0x00D1066A, /* PSDPxoxn */
	0x00D20705, /* PDSnax */
	0x00D307A4, /* SPDSoaxn */
	0x00D41D78, /* SSPxPDxax */
	0x00D50CE9, /* DPSanan */
	0x00D616EA, /* PSDPSaoxx */
	0x00D70349, /* DPSxan */
	0x00D80745, /* PDSPxax */
	0x00D906E8, /* SDPSaoxn */
	0x00DA1CE9, /* DPSDanax */
	0x00DB0D75, /* SPxDSxan */
	0x00DC0B04, /* SPDnao */
	0x00DD0228, /* SDno */
	0x00DE0268, /* SDPxo */
	0x00DF08C8, /* SDPano */
	0x00E003A5, /* PDSoa */
	0x00E10185, /* PDSoxn */
	0x00E20746, /* DSPDxax */
	0x00E306EA, /* PSDPaoxn */
	0x00E40748, /* SDPSxax */
	0x00E506E5, /* PDSPaoxn */
	0x00E61CE8, /* SDPSanax */
	0x00E70D79, /* SPxPDxan */
	0x00E81D74, /* SSPxDSxax */
	0x00E95CE6, /* DSPDSanaxxn */
	0x00EA02E9, /* DPSao */
	0x00EB0849, /* DPSxno */
	0x00EC02E8, /* SDPao */
	0x00ED0848, /* SDPxno */
	0x00EE0086, /* DSo */
	0x00EF0A08, /* SDPnoo */
	0x00F00021, /* P */
	0x00F10885, /* PDSono */
	0x00F20B05, /* PDSnao */
	0x00F3022A, /* PSno */
	0x00F40B0A, /* PSDnao */
	0x00F50225, /* PDno */
	0x00F60265, /* PDSxo */
	0x00F708C5, /* PDSano */
	0x00F802E5, /* PDSao */
	0x00F90845, /* PDSxno */
	0x00FA0089, /* DPo */
	0x00FB0A09, /* DPSnoo */
	0x00FC008A, /* PSo */
	0x00FD0A0A, /* PSDnoo */
	0x00FE02A9, /* DPSoo */
	0x00FF0062  /* 1 */
};

/* GDI Helper Functions */

uint32
gdi_rop3_code(uint8 code)
{
	return rop3_code_table[code];
}

void
gdi_copy_mem(uint8 * d, uint8 * s, int n)
{
	memcpy(d, s, n);
}

void
gdi_copy_mem_backwards(uint8 * d, uint8 * s, int n)
{
	d = (d + n) - 1;
	s = (s + n) - 1;
	
	while (n & (~7))
	{
		*(d--) = *(s--);
		*(d--) = *(s--);
		*(d--) = *(s--);
		*(d--) = *(s--);
		*(d--) = *(s--);
		*(d--) = *(s--);
		*(d--) = *(s--);
		*(d--) = *(s--);
		n = n - 8;
	}

	while (n > 0)
	{
		*(d--) = *(s--);
		n--;
	}
}

uint8*
gdi_get_bitmap_pointer(HGDI_DC hdcBmp, int x, int y)
{
	uint8 * p;
	HGDI_BITMAP hBmp = (HGDI_BITMAP) hdcBmp->selectedObject;
	
	if (x >= 0 && x < hBmp->width && y >= 0 && y < hBmp->height)
	{
		p = hBmp->data + (y * hBmp->width * hdcBmp->bytesPerPixel) + (x * hdcBmp->bytesPerPixel);
		return p;
	}
	else
	{
		printf("gdi_get_bitmap_pointer: requesting invalid pointer: (%d,%d) in %dx%d\n", x, y, hBmp->width, hBmp->height);
		return 0;
	}
}

uint8*
gdi_get_brush_pointer(HGDI_DC hdcBrush, int x, int y)
{
	uint8 * p;

	if (hdcBrush->brush != NULL)
	{
		if (hdcBrush->brush->style == GDI_BS_PATTERN)
		{
			HGDI_BITMAP hBmpBrush = hdcBrush->brush->pattern;
	
			if (x >= 0 && y >= 0)
			{
				x = x % hBmpBrush->width;
				y = y % hBmpBrush->height;
				p = hBmpBrush->data + (y * hBmpBrush->scanline) + (x * hBmpBrush->bytesPerPixel);
				return p;
			}
		}
	}

	p = (uint8*) &(hdcBrush->textColor);
	return p;
}

int
gdi_is_mono_pixel_set(uint8* data, int x, int y, int width)
{
	int byte;
	int shift;

	width = (width + 7) / 8;
	byte = (y * width) + (x / 8);
	shift = x % 8;

	return (data[byte] & (0x80 >> shift)) != 0;
}

HGDI_BITMAP
gdi_create_bitmap(GDI* gdi, int width, int height, int bpp, uint8* data)
{
	uint8* bmpData;
	HGDI_BITMAP bitmap;
	
	bmpData = gdi_image_convert(data, NULL, width, height, gdi->srcBpp, bpp, gdi->clrconv);
	bitmap = gdi_CreateBitmap(width, height, gdi->dstBpp, bmpData);
	
	return bitmap;
}

GDI_IMAGE*
gdi_bitmap_new(GDI *gdi, int width, int height, int bpp, uint8* data)
{
	GDI_IMAGE *gdi_bmp;
	
	gdi_bmp = (GDI_IMAGE*) malloc(sizeof(GDI_IMAGE));
	gdi_bmp->hdc = gdi_CreateCompatibleDC(gdi->hdc);
	
	DEBUG_GDI("gdi_bitmap_new: width:%d height:%d bpp:%d", width, height, bpp);

	if (data == NULL)
	{
		gdi_bmp->bitmap = gdi_CreateCompatibleBitmap(gdi->hdc, width, height);
	}
	else
	{
		gdi_bmp->bitmap = gdi_create_bitmap(gdi, width, height, bpp, data);
	}
	
	gdi_SelectObject(gdi_bmp->hdc, (HGDIOBJECT) gdi_bmp->bitmap);
	gdi_bmp->org_bitmap = NULL;

	return gdi_bmp;
}

void
gdi_bitmap_free(GDI_IMAGE *gdi_bmp)
{
	if (gdi_bmp != 0)
	{
		gdi_SelectObject(gdi_bmp->hdc, (HGDIOBJECT) gdi_bmp->org_bitmap);
		gdi_DeleteObject((HGDIOBJECT) gdi_bmp->bitmap);
		gdi_DeleteDC(gdi_bmp->hdc);
		free(gdi_bmp);
	}
}

/* GDI callbacks registered in libfreerdp */

static void
gdi_ui_desktop_save(struct rdp_inst * inst, int offset, int x, int y, int cx, int cy)
{
	DEBUG_GDI("gdi_ui_desktop_save");
}

static void
gdi_ui_desktop_restore(struct rdp_inst * inst, int offset, int x, int y, int cx, int cy)
{
	DEBUG_GDI("gdi_ui_desktop_restore");
}

/**
 * Create a new glyph.
 * @param inst current instance
 * @param width glyph width
 * @param height glyph height
 * @param data glyph data
 * @return new glyph
 */

static FRDP_HGLYPH
gdi_ui_create_glyph(struct rdp_inst * inst, int width, int height, uint8 * data)
{
	uint8* glyph;
	GDI_IMAGE *gdi_bmp;

	DEBUG_GDI("gdi_ui_create_glyph: width:%d height:%d", width, height);

	gdi_bmp = (GDI_IMAGE*) malloc(sizeof(GDI_IMAGE));
	
	gdi_bmp->hdc = gdi_GetDC();
	gdi_bmp->hdc->bytesPerPixel = 1;
	gdi_bmp->hdc->bitsPerPixel = 1;
	glyph = gdi_glyph_convert(width, height, data);
	gdi_bmp->bitmap = gdi_CreateBitmap(width, height, 1, glyph);
	gdi_bmp->bitmap->bytesPerPixel = 1;
	gdi_bmp->bitmap->bitsPerPixel = 1;
	gdi_SelectObject(gdi_bmp->hdc, (HGDIOBJECT) gdi_bmp->bitmap);
	gdi_bmp->org_bitmap = NULL;

	return (FRDP_HGLYPH) gdi_bmp;
}

/**
 * Destroy a glyph.
 * @param inst current instance
 * @param glyph glyph
 */

static void
gdi_ui_destroy_glyph(struct rdp_inst * inst, FRDP_HGLYPH glyph)
{
	gdi_bitmap_free((GDI_IMAGE*) glyph);
}

/**
 * Create a new bitmap.
 * @param inst current instance
 * @param width bitmap width
 * @param height bitmap height
 * @param data bitmap data
 * @return new bitmap
 */

static FRDP_HBITMAP
gdi_ui_create_bitmap(struct rdp_inst * inst, int width, int height, uint8* data)
{
	GDI_IMAGE *gdi_bmp;
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("gdi_ui_create_bitmap: width:%d height:%d", width, height);

	gdi_bmp = gdi_bitmap_new(gdi, width, height, gdi->dstBpp, data);
	
	return (FRDP_HBITMAP) gdi_bmp;
}

/**
 * Paint a bitmap without persisting it in the bitmap cache.
 * @param inst current instance
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param width bitmap width
 * @param height bitmap height
 * @param data bitmap data
 */

static void
gdi_ui_paint_bitmap(struct rdp_inst * inst, int x, int y, int cx, int cy, int width, int height, uint8 * data)
{
	GDI_IMAGE *gdi_bmp;
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_paint_bitmap: x:%d y:%d cx:%d cy:%d", x, y, cx, cy);

	gdi_bmp = (GDI_IMAGE*) inst->ui_create_bitmap(inst, width, height, data);
	gdi_BitBlt(gdi->primary->hdc, x, y, cx, cy, gdi_bmp->hdc, 0, 0, GDI_SRCCOPY);
	inst->ui_destroy_bitmap(inst, (FRDP_HBITMAP) gdi_bmp);
}

/**
 * Destroy a bitmap.
 * @param inst current instance
 * @param bmp bitmap
 */

static void
gdi_ui_destroy_bitmap(struct rdp_inst * inst, FRDP_HBITMAP bmp)
{
	gdi_bitmap_free((GDI_IMAGE*) bmp);
}

/**
 * Draw a line using a pen.\n
 * LineTo (LINETO_ORDER) @msdn{cc241589}
 * @param inst current instance
 * @param opcode raster operation code
 * @param startx line starting x position
 * @param starty line starting y position
 * @param endx line ending x position
 * @param endy line ending y position
 * @param pen pen
 */

static void
gdi_ui_line(struct rdp_inst * inst, uint8 opcode, int startx, int starty, int endx, int endy, FRDP_PEN * pen)
{
	HGDI_PEN hPen;
	int cx, cy;
	uint32 color;
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_line opcode:0x%02X startx:%d starty:%d endx:%d endy:%d", opcode, startx, starty, endx, endy);

	cx = endx - startx + 1;
	cy = endy - starty + 1;
	
	color = gdi_color_convert(pen->color, gdi->srcBpp, 32, gdi->clrconv);
	hPen = gdi_CreatePen(pen->style, pen->width, (GDI_COLOR) color);
	gdi_SelectObject(gdi->drawing->hdc, (HGDIOBJECT) hPen);
	gdi_SetROP2(gdi->drawing->hdc, opcode);

	gdi_MoveToEx(gdi->drawing->hdc, startx, starty, NULL);
	gdi_LineTo(gdi->drawing->hdc, endx, endy);
	
	gdi_DeleteObject((HGDIOBJECT) hPen);
}

/**
 * Draw a rectangle using a color.
 * @param inst current instance
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param color color
 */

static void
gdi_ui_rect(struct rdp_inst * inst, int x, int y, int cx, int cy, uint32 color)
{
	GDI_RECT rect;
	HGDI_BRUSH hBrush;
	uint32 brush_color;
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_rect: x:%d y:%d cx:%d cy:%d", x, y, cx, cy);

	gdi_CRgnToRect(x, y, cx, cy, &rect);
	brush_color = gdi_color_convert(color, gdi->srcBpp, 32, gdi->clrconv);

	hBrush = gdi_CreateSolidBrush(brush_color);
	gdi_FillRect(gdi->drawing->hdc, &rect, hBrush);
	gdi_DeleteObject((HGDIOBJECT) hBrush);
}

/**
 * Draw a polygon using a brush.\n
 * PolygonSC (POLYGON_SC_ORDER) @msdn{cc241594}\n
 * PolygonCB (POLYGON_CB_ORDER) @msdn{cc241595}
 * @param inst current instance
 * @param opcode raster operation code
 * @param fillmode fill mode
 * @param point array of points
 * @param npoints number of points
 * @param brush brush
 * @param bgcolor background color
 * @param fgcolor foreground color
 */

static void
gdi_ui_polygon(struct rdp_inst * inst, uint8 opcode, uint8 fillmode, FRDP_POINT * point, int npoints, FRDP_BRUSH * brush, uint32 bgcolor, uint32 fgcolor)
{
	DEBUG_GDI("ui_polygon");
}

/**
 * Draw a solid color polyline.\n
 * Polyline (POLYLINE_ORDER) @msdn{cc241596}
 * @param inst current instance
 * @param opcode raster operation code
 * @param points array of points
 * @param npoints number of points
 * @param pen pen
 */

static void
gdi_ui_polyline(struct rdp_inst * inst, uint8 opcode, FRDP_POINT * points, int npoints, FRDP_PEN * pen)
{
	int i;
	HGDI_PEN hPen;
	int cx, cy;
	uint32 color;
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_polyline: opcode:%d npoints:%d", opcode, npoints);

	color = gdi_color_convert(pen->color, gdi->srcBpp, 32, gdi->clrconv);

	hPen = gdi_CreatePen(pen->style, pen->width, (GDI_COLOR) color);
	gdi_SelectObject(gdi->drawing->hdc, (HGDIOBJECT) hPen);
	gdi_SetROP2(gdi->drawing->hdc, opcode);

	cx = points[0].x;
	cy = points[0].y;
	for(i = 1; i < npoints; i++)
	{
		gdi_MoveToEx(gdi->drawing->hdc, cx, cy, NULL);
		cx += points[i].x;
		cy += points[i].y;
		gdi_LineTo(gdi->drawing->hdc, cx, cy);
	}

	gdi_DeleteObject((HGDIOBJECT) hPen);
}

/**
 * Draw an ellipse using a brush.\n
 * EclipseSC (ELLIPSE_SC_ORDER) @msdn{cc241597}\n
 * EclipseCB (ELLIPSE_CB_ORDER) @msdn{cc241599}
 * @param inst current instance
 * @param opcode raster operation code
 * @param fillmode fill mode
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param brush brush
 * @param bgcolor background color
 * @param fgcolor foreground color
 */

static void
gdi_ui_ellipse(struct rdp_inst * inst, uint8 opcode, uint8 fillmode, int x, int y, int cx, int cy, FRDP_BRUSH * brush, uint32 bgcolor, uint32 fgcolor)
{
	DEBUG_GDI("ui_ellipse");
}

/**
 * Start drawing a set of glyphs.
 * @param inst current instance
 * @param bgcolor background color
 * @param fgcolor foreground color
 */

static void
gdi_ui_start_draw_glyphs(struct rdp_inst * inst, uint32 bgcolor, uint32 fgcolor)
{
	uint32 color;
	GDI *gdi = GET_GDI(inst);
	color = gdi_color_convert(fgcolor, gdi->srcBpp, 32, gdi->clrconv);
	gdi->textColor = gdi_SetTextColor(gdi->drawing->hdc, color);
}

/**
 * Draw a single glyph.
 * @param inst current instance
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param glyph glyph
 */

static void
gdi_ui_draw_glyph(struct rdp_inst * inst, int x, int y, int cx, int cy, FRDP_HGLYPH glyph)
{
	GDI_IMAGE* gdi_bmp;
	GDI *gdi = GET_GDI(inst);

	gdi_bmp = (GDI_IMAGE*) glyph;
	gdi_BitBlt(gdi->drawing->hdc, x, y, cx, cy, gdi_bmp->hdc, 0, 0, GDI_DSPDxax);
}

/**
 * End drawing a set of glyphs.
 * @param inst current instance
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 */

static void
gdi_ui_end_draw_glyphs(struct rdp_inst * inst, int x, int y, int cx, int cy)
{
	GDI *gdi = GET_GDI(inst);
	gdi_SetTextColor(gdi->drawing->hdc, gdi->textColor);
}

/**
 * DstBlt (DSTBLT_ORDER) primary drawing order.\n
 * @msdn{cc241587}
 * @param inst current instance
 * @param opcode raster operation code
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 */

static void
gdi_ui_destblt(struct rdp_inst * inst, uint8 opcode, int x, int y, int cx, int cy)
{
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_destblt: x: %d y: %d cx: %d cy: %d rop: 0x%X", x, y, cx, cy, rop3_code_table[opcode]);
	gdi_BitBlt(gdi->drawing->hdc, x, y, cx, cy, NULL, 0, 0, gdi_rop3_code(opcode));
}

/**
 * PatBlt (PATBLT_ORDER) primary drawing order.\n
 * @msdn{cc241602}
 * @param inst current instance
 * @param opcode raster operation code
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param brush brush
 * @param bgcolor background color
 * @param fgcolor foreground color
 */

static void
gdi_ui_patblt(struct rdp_inst * inst, uint8 opcode, int x, int y, int cx, int cy, FRDP_BRUSH * brush, uint32 bgcolor, uint32 fgcolor)
{
	HGDI_BRUSH originalBrush;
	GDI *gdi = GET_GDI(inst);
	
	DEBUG_GDI("ui_patblt: x: %d y: %d cx: %d cy: %d rop: 0x%X", x, y, cx, cy, gdi_rop3_code(opcode));
	
	if (brush->style == GDI_BS_PATTERN)
	{
		uint8* data;
		HGDI_BITMAP hBmp;

		if (brush->bd->color_code > 1)
			data = gdi_image_convert(brush->bd->data, NULL, 8, 8, gdi->srcBpp, gdi->dstBpp, gdi->clrconv);
		else
			data = gdi_mono_image_convert(brush->bd->data, 8, 8, gdi->srcBpp, gdi->dstBpp, bgcolor, fgcolor, gdi->clrconv);

		hBmp = gdi_CreateBitmap(8, 8, gdi->drawing->hdc->bitsPerPixel, data);

		originalBrush = gdi->drawing->hdc->brush;
		gdi->drawing->hdc->brush = gdi_CreatePatternBrush(hBmp);

		gdi_PatBlt(gdi->drawing->hdc, x, y, cx, cy, gdi_rop3_code(opcode));

		gdi_DeleteObject((HGDIOBJECT) gdi->drawing->hdc->brush);
		gdi->drawing->hdc->brush = originalBrush;
	}
	else if (brush->style == GDI_BS_SOLID)
	{
		uint32 color;
		originalBrush = gdi->drawing->hdc->brush;

		color = gdi_color_convert(fgcolor, gdi->srcBpp, 32, gdi->clrconv);
		gdi->drawing->hdc->brush = gdi_CreateSolidBrush(color);

		gdi_PatBlt(gdi->drawing->hdc, x, y, cx, cy, gdi_rop3_code(opcode));

		gdi_DeleteObject((HGDIOBJECT) gdi->drawing->hdc->brush);
		gdi->drawing->hdc->brush = originalBrush;
	}
	else
	{
		printf("ui_patblt: unknown brush style: %d\n", brush->style);
	}
}

/**
 * ScrBlt (SCRBLT_ORDER) primary drawing order.\n
 * @msdn{cc241606}
 * @param inst current instance
 * @param opcode raster operation code
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param srcx source x position
 * @param srcy source y position
 */

static void
gdi_ui_screenblt(struct rdp_inst * inst, uint8 opcode, int x, int y, int cx, int cy, int srcx, int srcy)
{
	GDI *gdi = GET_GDI(inst);
	
	DEBUG_GDI("gdi_ui_screenblt x:%d y:%d cx:%d cy:%d srcx:%d srcy:%d rop:0x%X",
	          x, y, cx, cy, srcx, srcy, rop3_code_table[opcode]);
	
	gdi_BitBlt(gdi->drawing->hdc, x, y, cx, cy, gdi->primary->hdc, srcx, srcy, gdi_rop3_code(opcode));
}

/**
 * MemBlt (MEMBLT_ORDER) primary drawing order.\n
 * @msdn{cc241608}
 * @param inst current instance
 * @param opcode raster operation code
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param src source bitmap
 * @param srcx source bitmap x position
 * @param srcy source bitmap y position
 */

static void
gdi_ui_memblt(struct rdp_inst * inst, uint8 opcode, int x, int y, int cx, int cy, FRDP_HBITMAP src, int srcx, int srcy)
{
	GDI_IMAGE *gdi_bmp;
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("gdi_ui_memblt: x:%d y:%d cx:%d cy:%d srcx:%d, srcy:%d rop:0x%X",
	          x, y, cx, cy, srcx, srcy, gdi_rop3_code(opcode));

	gdi_bmp = (GDI_IMAGE*) src;
	gdi_BitBlt(gdi->drawing->hdc, x, y, cx, cy, gdi_bmp->hdc, srcx, srcy, gdi_rop3_code(opcode));
}

/**
 * Mem3Blt (MEM3BLT_ORDER) primary drawing order.\n
 * @msdn{cc241588}
 * @param inst current instance
 * @param opcode raster operation code
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 * @param src source bitmap
 * @param srcx source bitmap x position
 * @param srcy source bitmap y position
 * @param brush brush
 * @param bgcolor background color
 * @param fgcolor foreground color
 */

static void
gdi_ui_mem3blt(struct rdp_inst * inst, uint8 opcode, int x, int y, int cx, int cy,
	FRDP_HBITMAP src, int srcx, int srcy, FRDP_BRUSH * brush, uint32 bgcolor, uint32 fgcolor)
{
	DEBUG_GDI("gdi_ui_mem3blt opcode: 0x%X", rop3_code_table[opcode]);
}

/**
 * Cache color table (CACHE_COLOR_TABLE_ORDER).\n
 * @msdn{cc241617}
 * @param inst current instance
 * @param colors color table
 * @return new palette created from color table
 */

static FRDP_HPALETTE
gdi_ui_create_palette(struct rdp_inst * inst, FRDP_PALETTE * palette)
{
	DEBUG_GDI("gdi_ui_create_palette");
	return (FRDP_HPALETTE) gdi_CreatePalette((HGDI_PALETTE) palette);
}

/**
 * Set the current palette.
 * @param inst current instance
 * @param palette new color palette
 */

static void
gdi_ui_set_palette(struct rdp_inst * inst, FRDP_HPALETTE palette)
{
	GDI *gdi = GET_GDI(inst);
	DEBUG_GDI("gdi_ui_set_palette");
	gdi->clrconv->palette = (FRDP_PALETTE*) palette;
}

/**
 * Set current clipping region.
 * @param inst current instance
 * @param x x position
 * @param y y position
 * @param cx delta x
 * @param cy delta y
 */

static void
gdi_ui_set_clipping_region(struct rdp_inst * inst, int x, int y, int cx, int cy)
{
	GDI *gdi = GET_GDI(inst);
	gdi_SetClipRgn(gdi->drawing->hdc, x, y, cx, cy);
}

/**
 * Reset the current clipping region.
 * @param inst current instance
 */

static void
gdi_ui_reset_clipping_region(struct rdp_inst * inst)
{
	GDI *gdi = GET_GDI(inst);
	gdi_SetNullClipRgn(gdi->drawing->hdc);
}

/**
 * Create new drawing surface
 * @param inst current instance
 * @param width surface width
 * @param height surface height
 * @param old_surface old drawing surface
 * @return new drawing surface
 */

static FRDP_HBITMAP
gdi_ui_create_surface(struct rdp_inst * inst, int width, int height, FRDP_HBITMAP old_surface)
{
	GDI_IMAGE *gdi_bmp;
	GDI_IMAGE *old_gdi_bmp;
	GDI *gdi = GET_GDI(inst);

	gdi_bmp = gdi_bitmap_new(gdi, width, height, gdi->dstBpp, NULL);
	old_gdi_bmp = (GDI_IMAGE*) old_surface;
	
	if (old_gdi_bmp != 0)
	{
		gdi_bitmap_free(old_gdi_bmp);
	}

	if (gdi->drawing == old_gdi_bmp)
	{
		gdi->drawing = gdi_bmp;
	}
	
	DEBUG_GDI("ui_create_surface");
	
	return (FRDP_HBITMAP) gdi_bmp;
}

/**
 * Switch Surface (SWITCH_SURFACE_ORDER).
 * @msdn{cc241630}
 * @param inst current instance
 * @param surface new surface
 */

static void
gdi_ui_switch_surface(struct rdp_inst * inst, FRDP_HBITMAP surface)
{
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_switch_surface");
	
	if (surface != 0)
	{
		gdi->drawing = (GDI_IMAGE*) surface;
	}
	else
	{
		gdi->drawing = (GDI_IMAGE*) gdi->primary;
	}
}

/**
 * Destroy a surface.
 * @param inst
 * @param surface
 */

static void
gdi_ui_destroy_surface(struct rdp_inst * inst, FRDP_HBITMAP surface)
{
	GDI *gdi = GET_GDI(inst);

	DEBUG_GDI("ui_destroy_surface");
	
	if (gdi->drawing == surface)
	{
		gdi->drawing = gdi->primary;
	}
	
	if (surface != 0)
	{
		gdi_bitmap_free((GDI_IMAGE*) surface);
	}
}

static int
gdi_ui_decode(struct rdp_inst * inst, uint8 * data, int size)
{
	GDI *gdi = GET_GDI(inst);
	gdi_decode_data(gdi, data, size);
	return 0;
}

/**
 * Register GDI callbacks with libfreerdp.
 * @param inst current instance
 * @return
 */

static int
gdi_register_callbacks(rdpInst * inst)
{
	inst->ui_desktop_save = gdi_ui_desktop_save;
	inst->ui_desktop_restore = gdi_ui_desktop_restore;
	inst->ui_create_bitmap = gdi_ui_create_bitmap;
	inst->ui_paint_bitmap = gdi_ui_paint_bitmap;
	inst->ui_destroy_bitmap = gdi_ui_destroy_bitmap;
	inst->ui_line = gdi_ui_line;
	inst->ui_rect = gdi_ui_rect;
	inst->ui_polygon = gdi_ui_polygon;
	inst->ui_polyline = gdi_ui_polyline;
	inst->ui_ellipse = gdi_ui_ellipse;
	inst->ui_start_draw_glyphs = gdi_ui_start_draw_glyphs;
	inst->ui_draw_glyph = gdi_ui_draw_glyph;
	inst->ui_end_draw_glyphs = gdi_ui_end_draw_glyphs;
	inst->ui_destblt = gdi_ui_destblt;
	inst->ui_patblt = gdi_ui_patblt;
	inst->ui_screenblt = gdi_ui_screenblt;
	inst->ui_memblt = gdi_ui_memblt;
	inst->ui_triblt = gdi_ui_mem3blt;
	inst->ui_create_palette = gdi_ui_create_palette;
	inst->ui_set_palette = gdi_ui_set_palette;
	inst->ui_create_glyph = gdi_ui_create_glyph;
	inst->ui_destroy_glyph = gdi_ui_destroy_glyph;
	inst->ui_set_clip = gdi_ui_set_clipping_region;
	inst->ui_reset_clip = gdi_ui_reset_clipping_region;
	inst->ui_create_surface = gdi_ui_create_surface;
	inst->ui_set_surface = gdi_ui_switch_surface;
	inst->ui_destroy_surface = gdi_ui_destroy_surface;
	inst->ui_decode = gdi_ui_decode;
	return 0;
}

/**
 * Initialize GDI
 * @param inst current instance
 * @return
 */

int
gdi_init(rdpInst * inst, uint32 flags)
{
	GDI *gdi = (GDI*) malloc(sizeof(GDI));
	memset(gdi, 0, sizeof(GDI));
	SET_GDI(inst, gdi);

	gdi->width = inst->settings->width;
	gdi->height = inst->settings->height;
	gdi->srcBpp = inst->settings->color_depth;

	/* default internal buffer format */
	gdi->dstBpp = 32;
	gdi->bytesPerPixel = 4;

	if (gdi->srcBpp > 16)
	{
		if (flags & CLRBUF_32BPP)
		{
			gdi->dstBpp = 32;
			gdi->bytesPerPixel = 4;
		}
		else if (flags & CLRBUF_16BPP)
		{
			gdi->dstBpp = 16;
			gdi->bytesPerPixel = 2;
		}
	}
	else
	{
		if (flags & CLRBUF_16BPP)
		{
			gdi->dstBpp = 16;
			gdi->bytesPerPixel = 2;
		}
		else if (flags & CLRBUF_32BPP)
		{
			gdi->dstBpp = 32;
			gdi->bytesPerPixel = 4;
		}
	}
	
	gdi->hdc = gdi_GetDC();
	gdi->hdc->bitsPerPixel = gdi->dstBpp;
	gdi->hdc->bytesPerPixel = gdi->bytesPerPixel;

	gdi->clrconv = (HCLRCONV) malloc(sizeof(CLRCONV));
	gdi->clrconv->palette = NULL;
	gdi->clrconv->alpha = (flags & CLRCONV_ALPHA) ? 1 : 0;
	gdi->clrconv->invert = (flags & CLRCONV_INVERT) ? 1 : 0;
	gdi->clrconv->rgb555 = (flags & CLRCONV_RGB555) ? 1 : 0;

	gdi->hdc->alpha = gdi->clrconv->alpha;
	gdi->hdc->invert = gdi->clrconv->invert;
	gdi->hdc->rgb555 = gdi->clrconv->rgb555;

	gdi->primary = gdi_bitmap_new(gdi, gdi->width, gdi->height, gdi->dstBpp, NULL);
	gdi->primary_buffer = gdi->primary->bitmap->data;
	gdi->drawing = gdi->primary;

	gdi->primary->hdc->hwnd = (HGDI_WND) malloc(sizeof(GDI_WND));
	gdi->primary->hdc->hwnd->invalid = gdi_CreateRectRgn(0, 0, 0, 0);
	gdi->primary->hdc->hwnd->invalid->null = 1;

	gdi->tile = gdi_bitmap_new(gdi, 64, 64, 32, NULL);

	gdi_register_callbacks(inst);

	return 0;
}

void gdi_free(rdpInst* inst)
{
	GDI *gdi = GET_GDI(inst);

	if (gdi)
	{
		gdi_bitmap_free(gdi->primary);
		gdi_DeleteObject((HGDIOBJECT) gdi->hdc);
		free(gdi->clrconv);
		free(gdi);
	}
	
	SET_GDI(inst, NULL);
}